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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 06:33:50 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 06:33:50 +0000
commitfe39ffb8b90ae4e002ed73fe98617cd590abb467 (patch)
treeb80e5956907d8aeaaffe4e4f0c068c0e6157ce8b /modules/dav/main/mod_dav.c
parentInitial commit. (diff)
downloadapache2-fe39ffb8b90ae4e002ed73fe98617cd590abb467.tar.xz
apache2-fe39ffb8b90ae4e002ed73fe98617cd590abb467.zip
Adding upstream version 2.4.56.upstream/2.4.56
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'modules/dav/main/mod_dav.c')
-rw-r--r--modules/dav/main/mod_dav.c5237
1 files changed, 5237 insertions, 0 deletions
diff --git a/modules/dav/main/mod_dav.c b/modules/dav/main/mod_dav.c
new file mode 100644
index 0000000..d16ab4a
--- /dev/null
+++ b/modules/dav/main/mod_dav.c
@@ -0,0 +1,5237 @@
+/* Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/*
+ * DAV extension module for Apache 2.0.*
+ *
+ * This module is repository-independent. It depends on hooks provided by a
+ * repository implementation.
+ *
+ * APACHE ISSUES:
+ * - within a DAV hierarchy, if an unknown method is used and we default
+ * to Apache's implementation, it sends back an OPTIONS with the wrong
+ * set of methods -- there is NO HOOK for us.
+ * therefore: we need to manually handle the HTTP_METHOD_NOT_ALLOWED
+ * and HTTP_NOT_IMPLEMENTED responses (not ap_send_error_response).
+ * - process_mkcol_body() had to dup code from ap_setup_client_block().
+ * - it would be nice to get status lines from Apache for arbitrary
+ * status codes
+ * - it would be nice to be able to extend Apache's set of response
+ * codes so that it doesn't return 500 when an unknown code is placed
+ * into r->status.
+ * - http_vhost functions should apply "const" to their params
+ *
+ * DESIGN NOTES:
+ * - For PROPFIND, we batch up the entire response in memory before
+ * sending it. We may want to reorganize around sending the information
+ * as we suck it in from the propdb. Alternatively, we should at least
+ * generate a total Content-Length if we're going to buffer in memory
+ * so that we can keep the connection open.
+ */
+
+#include "apr_strings.h"
+#include "apr_lib.h" /* for apr_is* */
+
+#define APR_WANT_STRFUNC
+#include "apr_want.h"
+
+#include "httpd.h"
+#include "http_config.h"
+#include "http_core.h"
+#include "http_log.h"
+#include "http_main.h"
+#include "http_protocol.h"
+#include "http_request.h"
+#include "util_script.h"
+
+#include "mod_dav.h"
+
+#include "ap_provider.h"
+
+
+/* ### what is the best way to set this? */
+#define DAV_DEFAULT_PROVIDER "filesystem"
+
+/* used to denote that mod_dav will be handling this request */
+#define DAV_HANDLER_NAME "dav-handler"
+
+APLOG_USE_MODULE(dav);
+
+enum {
+ DAV_ENABLED_UNSET = 0,
+ DAV_ENABLED_OFF,
+ DAV_ENABLED_ON
+};
+
+/* per-dir configuration */
+typedef struct {
+ const char *provider_name;
+ const dav_provider *provider;
+ const char *dir;
+ int locktimeout;
+ int allow_depthinfinity;
+ int allow_lockdiscovery;
+
+} dav_dir_conf;
+
+/* per-server configuration */
+typedef struct {
+ int unused;
+
+} dav_server_conf;
+
+#define DAV_INHERIT_VALUE(parent, child, field) \
+ ((child)->field ? (child)->field : (parent)->field)
+
+
+/* forward-declare for use in configuration lookup */
+extern module DAV_DECLARE_DATA dav_module;
+
+/* DAV methods */
+enum {
+ DAV_M_BIND = 0,
+ DAV_M_SEARCH,
+ DAV_M_LAST
+};
+static int dav_methods[DAV_M_LAST];
+
+
+static int dav_init_handler(apr_pool_t *p, apr_pool_t *plog, apr_pool_t *ptemp,
+ server_rec *s)
+{
+ /* DBG0("dav_init_handler"); */
+
+ /* Register DAV methods */
+ dav_methods[DAV_M_BIND] = ap_method_register(p, "BIND");
+ dav_methods[DAV_M_SEARCH] = ap_method_register(p, "SEARCH");
+
+ return OK;
+}
+
+static void *dav_create_server_config(apr_pool_t *p, server_rec *s)
+{
+ dav_server_conf *newconf;
+
+ newconf = (dav_server_conf *)apr_pcalloc(p, sizeof(*newconf));
+
+ /* ### this isn't used at the moment... */
+
+ return newconf;
+}
+
+static void *dav_merge_server_config(apr_pool_t *p, void *base, void *overrides)
+{
+#if 0
+ dav_server_conf *child = overrides;
+#endif
+ dav_server_conf *newconf;
+
+ newconf = (dav_server_conf *)apr_pcalloc(p, sizeof(*newconf));
+
+ /* ### nothing to merge right now... */
+
+ return newconf;
+}
+
+static void *dav_create_dir_config(apr_pool_t *p, char *dir)
+{
+ /* NOTE: dir==NULL creates the default per-dir config */
+
+ dav_dir_conf *conf;
+
+ conf = (dav_dir_conf *)apr_pcalloc(p, sizeof(*conf));
+
+ /* clean up the directory to remove any trailing slash */
+ if (dir != NULL) {
+ char *d;
+ apr_size_t l;
+
+ l = strlen(dir);
+ d = apr_pstrmemdup(p, dir, l);
+ if (l > 1 && d[l - 1] == '/')
+ d[l - 1] = '\0';
+ conf->dir = d;
+ }
+
+ return conf;
+}
+
+static void *dav_merge_dir_config(apr_pool_t *p, void *base, void *overrides)
+{
+ dav_dir_conf *parent = base;
+ dav_dir_conf *child = overrides;
+ dav_dir_conf *newconf = (dav_dir_conf *)apr_pcalloc(p, sizeof(*newconf));
+
+ /* DBG3("dav_merge_dir_config: new=%08lx base=%08lx overrides=%08lx",
+ (long)newconf, (long)base, (long)overrides); */
+
+ newconf->provider_name = DAV_INHERIT_VALUE(parent, child, provider_name);
+ newconf->provider = DAV_INHERIT_VALUE(parent, child, provider);
+ if (parent->provider_name != NULL) {
+ if (child->provider_name == NULL) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, 0, NULL, APLOGNO(00578)
+ "\"DAV Off\" cannot be used to turn off a subtree "
+ "of a DAV-enabled location.");
+ }
+ else if (strcasecmp(child->provider_name,
+ parent->provider_name) != 0) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, 0, NULL, APLOGNO(00579)
+ "A subtree cannot specify a different DAV provider "
+ "than its parent.");
+ }
+ }
+
+ newconf->locktimeout = DAV_INHERIT_VALUE(parent, child, locktimeout);
+ newconf->dir = DAV_INHERIT_VALUE(parent, child, dir);
+ newconf->allow_depthinfinity = DAV_INHERIT_VALUE(parent, child,
+ allow_depthinfinity);
+ newconf->allow_lockdiscovery = DAV_INHERIT_VALUE(parent, child,
+ allow_lockdiscovery);
+
+ return newconf;
+}
+
+DAV_DECLARE(const char *) dav_get_provider_name(request_rec *r)
+{
+ dav_dir_conf *conf = ap_get_module_config(r->per_dir_config, &dav_module);
+ return conf ? conf->provider_name : NULL;
+}
+
+DAV_DECLARE(const dav_provider *) dav_get_provider(request_rec *r)
+{
+ dav_dir_conf *conf;
+
+ conf = ap_get_module_config(r->per_dir_config, &dav_module);
+ /* assert: conf->provider_name != NULL
+ (otherwise, DAV is disabled, and we wouldn't be here) */
+
+ /* assert: conf->provider != NULL
+ (checked when conf->provider_name is set) */
+ return conf->provider;
+}
+
+DAV_DECLARE(const dav_hooks_locks *) dav_get_lock_hooks(request_rec *r)
+{
+ return dav_get_provider(r)->locks;
+}
+
+DAV_DECLARE(const dav_hooks_propdb *) dav_get_propdb_hooks(request_rec *r)
+{
+ return dav_get_provider(r)->propdb;
+}
+
+DAV_DECLARE(const dav_hooks_vsn *) dav_get_vsn_hooks(request_rec *r)
+{
+ return dav_get_provider(r)->vsn;
+}
+
+DAV_DECLARE(const dav_hooks_binding *) dav_get_binding_hooks(request_rec *r)
+{
+ return dav_get_provider(r)->binding;
+}
+
+DAV_DECLARE(const dav_hooks_search *) dav_get_search_hooks(request_rec *r)
+{
+ return dav_get_provider(r)->search;
+}
+
+/*
+ * Command handler for the DAV directive, which is TAKE1.
+ */
+static const char *dav_cmd_dav(cmd_parms *cmd, void *config, const char *arg1)
+{
+ dav_dir_conf *conf = (dav_dir_conf *)config;
+
+ if (strcasecmp(arg1, "on") == 0) {
+ conf->provider_name = DAV_DEFAULT_PROVIDER;
+ }
+ else if (strcasecmp(arg1, "off") == 0) {
+ conf->provider_name = NULL;
+ conf->provider = NULL;
+ }
+ else {
+ conf->provider_name = arg1;
+ }
+
+ if (conf->provider_name != NULL) {
+ /* lookup and cache the actual provider now */
+ conf->provider = dav_lookup_provider(conf->provider_name);
+
+ if (conf->provider == NULL) {
+ /* by the time they use it, the provider should be loaded and
+ registered with us. */
+ return apr_psprintf(cmd->pool,
+ "Unknown DAV provider: %s",
+ conf->provider_name);
+ }
+ }
+
+ return NULL;
+}
+
+/*
+ * Command handler for the DAVDepthInfinity directive, which is FLAG.
+ */
+static const char *dav_cmd_davdepthinfinity(cmd_parms *cmd, void *config,
+ int arg)
+{
+ dav_dir_conf *conf = (dav_dir_conf *)config;
+
+ if (arg)
+ conf->allow_depthinfinity = DAV_ENABLED_ON;
+ else
+ conf->allow_depthinfinity = DAV_ENABLED_OFF;
+ return NULL;
+}
+
+/*
+ * Command handler for the DAVLockDiscovery directive, which is FLAG.
+ */
+static const char *dav_cmd_davlockdiscovery(cmd_parms *cmd, void *config,
+ int arg)
+{
+ dav_dir_conf *conf = (dav_dir_conf *)config;
+
+ if (arg)
+ conf->allow_lockdiscovery = DAV_ENABLED_ON;
+ else
+ conf->allow_lockdiscovery = DAV_ENABLED_OFF;
+ return NULL;
+}
+
+/*
+ * Command handler for DAVMinTimeout directive, which is TAKE1
+ */
+static const char *dav_cmd_davmintimeout(cmd_parms *cmd, void *config,
+ const char *arg1)
+{
+ dav_dir_conf *conf = (dav_dir_conf *)config;
+
+ conf->locktimeout = atoi(arg1);
+ if (conf->locktimeout < 0)
+ return "DAVMinTimeout requires a non-negative integer.";
+
+ return NULL;
+}
+
+/*
+** dav_error_response()
+**
+** Send a nice response back to the user. In most cases, Apache doesn't
+** allow us to provide details in the body about what happened. This
+** function allows us to completely specify the response body.
+**
+** ### this function is not logging any errors! (e.g. the body)
+*/
+static int dav_error_response(request_rec *r, int status, const char *body)
+{
+ r->status = status;
+ r->status_line = ap_get_status_line(status);
+
+ ap_set_content_type(r, "text/html; charset=ISO-8859-1");
+
+ /* begin the response now... */
+ ap_rvputs(r,
+ DAV_RESPONSE_BODY_1,
+ r->status_line,
+ DAV_RESPONSE_BODY_2,
+ &r->status_line[4],
+ DAV_RESPONSE_BODY_3,
+ body,
+ DAV_RESPONSE_BODY_4,
+ ap_psignature("<hr />\n", r),
+ DAV_RESPONSE_BODY_5,
+ NULL);
+
+ /* the response has been sent. */
+ /*
+ * ### Use of DONE obviates logging..!
+ */
+ return DONE;
+}
+
+
+/*
+ * Send a "standardized" error response based on the error's namespace & tag
+ */
+static int dav_error_response_tag(request_rec *r,
+ dav_error *err)
+{
+ r->status = err->status;
+
+ ap_set_content_type(r, DAV_XML_CONTENT_TYPE);
+
+ ap_rputs(DAV_XML_HEADER DEBUG_CR
+ "<D:error xmlns:D=\"DAV:\"", r);
+
+ if (err->desc != NULL) {
+ /* ### should move this namespace somewhere (with the others!) */
+ ap_rputs(" xmlns:m=\"http://apache.org/dav/xmlns\"", r);
+ }
+
+ if (err->childtags) {
+ if (err->namespace != NULL) {
+ ap_rprintf(r,
+ " xmlns:C=\"%s\">" DEBUG_CR
+ "<C:%s>%s</C:%s>" DEBUG_CR,
+ err->namespace,
+ err->tagname, err->childtags, err->tagname);
+ }
+ else {
+ ap_rprintf(r,
+ ">" DEBUG_CR
+ "<D:%s>%s</D:%s>" DEBUG_CR,
+ err->tagname, err->childtags, err->tagname);
+ }
+ }
+ else {
+ if (err->namespace != NULL) {
+ ap_rprintf(r,
+ " xmlns:C=\"%s\">" DEBUG_CR
+ "<C:%s/>" DEBUG_CR,
+ err->namespace, err->tagname);
+ }
+ else {
+ ap_rprintf(r,
+ ">" DEBUG_CR
+ "<D:%s/>" DEBUG_CR, err->tagname);
+ }
+ }
+
+ /* here's our mod_dav specific tag: */
+ if (err->desc != NULL) {
+ ap_rprintf(r,
+ "<m:human-readable errcode=\"%d\">" DEBUG_CR
+ "%s" DEBUG_CR
+ "</m:human-readable>" DEBUG_CR,
+ err->error_id,
+ apr_xml_quote_string(r->pool, err->desc, 0));
+ }
+
+ ap_rputs("</D:error>" DEBUG_CR, r);
+
+ /* the response has been sent. */
+ /*
+ * ### Use of DONE obviates logging..!
+ */
+ return DONE;
+}
+
+
+/*
+ * Apache's URI escaping does not replace '&' since that is a valid character
+ * in a URI (to form a query section). We must explicitly handle it so that
+ * we can embed the URI into an XML document.
+ */
+static const char *dav_xml_escape_uri(apr_pool_t *p, const char *uri)
+{
+ const char *e_uri = ap_escape_uri(p, uri);
+
+ /* check the easy case... */
+ if (ap_strchr_c(e_uri, '&') == NULL)
+ return e_uri;
+
+ /* there was a '&', so more work is needed... sigh. */
+
+ /*
+ * Note: this is a teeny bit of overkill since we know there are no
+ * '<' or '>' characters, but who cares.
+ */
+ return apr_xml_quote_string(p, e_uri, 0);
+}
+
+
+/* Write a complete RESPONSE object out as a <DAV:response> xml
+ element. Data is sent into brigade BB, which is auto-flushed into
+ the output filter stack for request R. Use POOL for any temporary
+ allocations.
+
+ [Presumably the <multistatus> tag has already been written; this
+ routine is shared by dav_send_multistatus and dav_stream_response.]
+*/
+DAV_DECLARE(void) dav_send_one_response(dav_response *response,
+ apr_bucket_brigade *bb,
+ request_rec *r,
+ apr_pool_t *pool)
+{
+ apr_text *t = NULL;
+
+ if (response->propresult.xmlns == NULL) {
+ ap_fputs(r->output_filters, bb, "<D:response>");
+ }
+ else {
+ ap_fputs(r->output_filters, bb, "<D:response");
+ for (t = response->propresult.xmlns; t; t = t->next) {
+ ap_fputs(r->output_filters, bb, t->text);
+ }
+ ap_fputc(r->output_filters, bb, '>');
+ }
+
+ ap_fputstrs(r->output_filters, bb,
+ DEBUG_CR "<D:href>",
+ dav_xml_escape_uri(pool, response->href),
+ "</D:href>" DEBUG_CR,
+ NULL);
+
+ if (response->propresult.propstats == NULL) {
+ /* use the Status-Line text from Apache. Note, this will
+ * default to 500 Internal Server Error if first->status
+ * is not a known (or valid) status code.
+ */
+ ap_fputstrs(r->output_filters, bb,
+ "<D:status>HTTP/1.1 ",
+ ap_get_status_line(response->status),
+ "</D:status>" DEBUG_CR,
+ NULL);
+ }
+ else {
+ /* assume this includes <propstat> and is quoted properly */
+ for (t = response->propresult.propstats; t; t = t->next) {
+ ap_fputs(r->output_filters, bb, t->text);
+ }
+ }
+
+ if (response->desc != NULL) {
+ /*
+ * We supply the description, so we know it doesn't have to
+ * have any escaping/encoding applied to it.
+ */
+ ap_fputstrs(r->output_filters, bb,
+ "<D:responsedescription>",
+ response->desc,
+ "</D:responsedescription>" DEBUG_CR,
+ NULL);
+ }
+
+ ap_fputs(r->output_filters, bb, "</D:response>" DEBUG_CR);
+}
+
+
+/* Factorized helper function: prep request_rec R for a multistatus
+ response and write <multistatus> tag into BB, destined for
+ R->output_filters. Use xml NAMESPACES in initial tag, if
+ non-NULL. */
+DAV_DECLARE(void) dav_begin_multistatus(apr_bucket_brigade *bb,
+ request_rec *r, int status,
+ apr_array_header_t *namespaces)
+{
+ /* Set the correct status and Content-Type */
+ r->status = status;
+ ap_set_content_type(r, DAV_XML_CONTENT_TYPE);
+
+ /* Send the headers and actual multistatus response now... */
+ ap_fputs(r->output_filters, bb, DAV_XML_HEADER DEBUG_CR
+ "<D:multistatus xmlns:D=\"DAV:\"");
+
+ if (namespaces != NULL) {
+ int i;
+
+ for (i = namespaces->nelts; i--; ) {
+ ap_fprintf(r->output_filters, bb, " xmlns:ns%d=\"%s\"", i,
+ APR_XML_GET_URI_ITEM(namespaces, i));
+ }
+ }
+
+ ap_fputs(r->output_filters, bb, ">" DEBUG_CR);
+}
+
+/* Finish a multistatus response started by dav_begin_multistatus: */
+DAV_DECLARE(apr_status_t) dav_finish_multistatus(request_rec *r,
+ apr_bucket_brigade *bb)
+{
+ apr_bucket *b;
+
+ ap_fputs(r->output_filters, bb, "</D:multistatus>" DEBUG_CR);
+
+ /* indicate the end of the response body */
+ b = apr_bucket_eos_create(r->connection->bucket_alloc);
+ APR_BRIGADE_INSERT_TAIL(bb, b);
+
+ /* deliver whatever might be remaining in the brigade */
+ return ap_pass_brigade(r->output_filters, bb);
+}
+
+DAV_DECLARE(void) dav_send_multistatus(request_rec *r, int status,
+ dav_response *first,
+ apr_array_header_t *namespaces)
+{
+ apr_pool_t *subpool;
+ apr_bucket_brigade *bb = apr_brigade_create(r->pool,
+ r->connection->bucket_alloc);
+
+ dav_begin_multistatus(bb, r, status, namespaces);
+
+ apr_pool_create(&subpool, r->pool);
+ apr_pool_tag(subpool, "mod_dav-multistatus");
+
+ for (; first != NULL; first = first->next) {
+ apr_pool_clear(subpool);
+ dav_send_one_response(first, bb, r, subpool);
+ }
+ apr_pool_destroy(subpool);
+
+ dav_finish_multistatus(r, bb);
+}
+
+/*
+ * dav_log_err()
+ *
+ * Write error information to the log.
+ */
+static void dav_log_err(request_rec *r, dav_error *err, int level)
+{
+ dav_error *errscan;
+
+ /* Log the errors */
+ /* ### should have a directive to log the first or all */
+ for (errscan = err; errscan != NULL; errscan = errscan->prev) {
+ if (errscan->desc == NULL)
+ continue;
+
+ /* Intentional no APLOGNO */
+ ap_log_rerror(APLOG_MARK, level, errscan->aprerr, r, "%s [%d, #%d]",
+ errscan->desc, errscan->status, errscan->error_id);
+ }
+}
+
+/*
+ * dav_handle_err()
+ *
+ * Handle the standard error processing. <err> must be non-NULL.
+ *
+ * <response> is set by the following:
+ * - dav_validate_request()
+ * - dav_add_lock()
+ * - repos_hooks->remove_resource
+ * - repos_hooks->move_resource
+ * - repos_hooks->copy_resource
+ * - vsn_hooks->update
+ */
+DAV_DECLARE(int) dav_handle_err(request_rec *r, dav_error *err,
+ dav_response *response)
+{
+ /* log the errors */
+ dav_log_err(r, err, APLOG_ERR);
+
+ if (!ap_is_HTTP_VALID_RESPONSE(err->status)) {
+ /* we have responded already */
+ return AP_FILTER_ERROR;
+ }
+
+ if (response == NULL) {
+ dav_error *stackerr = err;
+
+ /* our error messages are safe; tell Apache this */
+ apr_table_setn(r->notes, "verbose-error-to", "*");
+
+ /* Didn't get a multistatus response passed in, but we still
+ might be able to generate a standard <D:error> response.
+ Search the error stack for an errortag. */
+ while (stackerr != NULL && stackerr->tagname == NULL)
+ stackerr = stackerr->prev;
+
+ if (stackerr != NULL && stackerr->tagname != NULL)
+ return dav_error_response_tag(r, stackerr);
+
+ return err->status;
+ }
+
+ /* send the multistatus and tell Apache the request/response is DONE. */
+ dav_send_multistatus(r, err->status, response, NULL);
+ return DONE;
+}
+
+/* handy function for return values of methods that (may) create things.
+ * locn if provided is assumed to be escaped. */
+static int dav_created(request_rec *r, const char *locn, const char *what,
+ int replaced)
+{
+ const char *body;
+
+ if (locn == NULL) {
+ locn = ap_escape_uri(r->pool, r->uri);
+ }
+
+ /* did the target resource already exist? */
+ if (replaced) {
+ /* Apache will supply a default message */
+ return HTTP_NO_CONTENT;
+ }
+
+ /* Per HTTP/1.1, S10.2.2: add a Location header to contain the
+ * URI that was created. */
+
+ /* Convert locn to an absolute URI, and return in Location header */
+ apr_table_setn(r->headers_out, "Location", ap_construct_url(r->pool, locn, r));
+
+ /* ### insert an ETag header? see HTTP/1.1 S10.2.2 */
+
+ /* Apache doesn't allow us to set a variable body for HTTP_CREATED, so
+ * we must manufacture the entire response. */
+ body = apr_pstrcat(r->pool, what, " ", ap_escape_html(r->pool, locn),
+ " has been created.", NULL);
+ return dav_error_response(r, HTTP_CREATED, body);
+}
+
+/* ### move to dav_util? */
+DAV_DECLARE(int) dav_get_depth(request_rec *r, int def_depth)
+{
+ const char *depth = apr_table_get(r->headers_in, "Depth");
+
+ if (depth == NULL) {
+ return def_depth;
+ }
+
+ if (ap_cstr_casecmp(depth, "infinity") == 0) {
+ return DAV_INFINITY;
+ }
+ else if (strcmp(depth, "0") == 0) {
+ return 0;
+ }
+ else if (strcmp(depth, "1") == 0) {
+ return 1;
+ }
+
+ /* The caller will return an HTTP_BAD_REQUEST. This will augment the
+ * default message that Apache provides. */
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00580)
+ "An invalid Depth header was specified.");
+ return -1;
+}
+
+static int dav_get_overwrite(request_rec *r)
+{
+ const char *overwrite = apr_table_get(r->headers_in, "Overwrite");
+
+ if (overwrite == NULL) {
+ return 1; /* default is "T" */
+ }
+
+ if ((*overwrite == 'F' || *overwrite == 'f') && overwrite[1] == '\0') {
+ return 0;
+ }
+
+ if ((*overwrite == 'T' || *overwrite == 't') && overwrite[1] == '\0') {
+ return 1;
+ }
+
+ /* The caller will return an HTTP_BAD_REQUEST. This will augment the
+ * default message that Apache provides. */
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00581)
+ "An invalid Overwrite header was specified.");
+ return -1;
+}
+
+/* resolve a request URI to a resource descriptor.
+ *
+ * If label_allowed != 0, then allow the request target to be altered by
+ * a Label: header.
+ *
+ * If use_checked_in is true, then the repository provider should return
+ * the resource identified by the DAV:checked-in property of the resource
+ * identified by the Request-URI.
+ */
+DAV_DECLARE(dav_error *) dav_get_resource(request_rec *r, int label_allowed,
+ int use_checked_in, dav_resource **res_p)
+{
+ dav_dir_conf *conf;
+ const char *label = NULL;
+ dav_error *err;
+
+ /* if the request target can be overridden, get any target selector */
+ if (label_allowed) {
+ label = apr_table_get(r->headers_in, "label");
+ }
+
+ conf = ap_get_module_config(r->per_dir_config, &dav_module);
+ /* assert: conf->provider != NULL */
+ if (conf->provider == NULL) {
+ return dav_new_error(r->pool, HTTP_METHOD_NOT_ALLOWED, 0, 0,
+ apr_psprintf(r->pool,
+ "DAV not enabled for %s",
+ ap_escape_html(r->pool, r->uri)));
+ }
+
+ /* resolve the resource */
+ err = (*conf->provider->repos->get_resource)(r, conf->dir,
+ label, use_checked_in,
+ res_p);
+ if (err != NULL) {
+ err = dav_push_error(r->pool, err->status, 0,
+ "Could not fetch resource information.", err);
+ return err;
+ }
+
+ /* Note: this shouldn't happen, but just be sure... */
+ if (*res_p == NULL) {
+ /* ### maybe use HTTP_INTERNAL_SERVER_ERROR */
+ return dav_new_error(r->pool, HTTP_NOT_FOUND, 0, 0,
+ apr_psprintf(r->pool,
+ "The provider did not define a "
+ "resource for %s.",
+ ap_escape_html(r->pool, r->uri)));
+ }
+
+ /* ### hmm. this doesn't feel like the right place or thing to do */
+ /* if there were any input headers requiring a Vary header in the response,
+ * add it now */
+ dav_add_vary_header(r, r, *res_p);
+
+ return NULL;
+}
+
+DAV_DECLARE(dav_error *) dav_open_lockdb(request_rec *r,
+ int ro,
+ dav_lockdb **lockdb)
+{
+ const dav_hooks_locks *hooks = DAV_GET_HOOKS_LOCKS(r);
+
+ if (hooks == NULL) {
+ *lockdb = NULL;
+ return NULL;
+ }
+
+ /* open the thing lazily */
+ return (*hooks->open_lockdb)(r, ro, 0, lockdb);
+}
+
+DAV_DECLARE(void) dav_close_lockdb(dav_lockdb *lockdb)
+{
+ (lockdb->hooks->close_lockdb)(lockdb);
+}
+
+/**
+ * @return 1 if valid content-range,
+ * 0 if no content-range,
+ * -1 if malformed content-range
+ */
+static int dav_parse_range(request_rec *r,
+ apr_off_t *range_start, apr_off_t *range_end)
+{
+ const char *range_c;
+ char *range;
+ char *dash;
+ char *slash;
+
+ range_c = apr_table_get(r->headers_in, "content-range");
+ if (range_c == NULL)
+ return 0;
+
+ range = apr_pstrdup(r->pool, range_c);
+ if (ap_cstr_casecmpn(range, "bytes ", 6) != 0
+ || (dash = ap_strchr(range + 6, '-')) == NULL
+ || (slash = ap_strchr(range + 6, '/')) == NULL) {
+ /* malformed header */
+ return -1;
+ }
+
+ *dash++ = *slash++ = '\0';
+
+ /* detect invalid ranges */
+ if (!ap_parse_strict_length(range_start, range + 6)) {
+ return -1;
+ }
+ if (!ap_parse_strict_length(range_end, dash)
+ || *range_end < *range_start) {
+ return -1;
+ }
+
+ if (*slash != '*') {
+ apr_off_t dummy;
+
+ if (!ap_parse_strict_length(&dummy, slash)
+ || dummy <= *range_end) {
+ return -1;
+ }
+ }
+
+ /* we now have a valid range */
+ return 1;
+}
+
+/* handle the GET method */
+static int dav_method_get(request_rec *r)
+{
+ dav_resource *resource;
+ dav_error *err;
+ int status;
+
+ /* This method should only be called when the resource is not
+ * visible to Apache. We will fetch the resource from the repository,
+ * then create a subrequest for Apache to handle.
+ */
+ err = dav_get_resource(r, 1 /* label_allowed */, 0 /* use_checked_in */,
+ &resource);
+ if (err != NULL)
+ return dav_handle_err(r, err, NULL);
+
+ /* check for any method preconditions */
+ if (dav_run_method_precondition(r, resource, NULL, NULL, &err) != DECLINED
+ && err) {
+ return dav_handle_err(r, err, NULL);
+ }
+
+ if (!resource->exists) {
+ /* Apache will supply a default error for this. */
+ return HTTP_NOT_FOUND;
+ }
+
+ /* set up the HTTP headers for the response */
+ if ((err = (*resource->hooks->set_headers)(r, resource)) != NULL) {
+ err = dav_push_error(r->pool, err->status, 0,
+ "Unable to set up HTTP headers.",
+ err);
+ return dav_handle_err(r, err, NULL);
+ }
+
+ /* Handle conditional requests */
+ status = ap_meets_conditions(r);
+ if (status) {
+ return status;
+ }
+
+ if (r->header_only) {
+ return DONE;
+ }
+
+ /* okay... time to deliver the content */
+ if ((err = (*resource->hooks->deliver)(resource,
+ r->output_filters)) != NULL) {
+ err = dav_push_error(r->pool, err->status, 0,
+ "Unable to deliver content.",
+ err);
+ return dav_handle_err(r, err, NULL);
+ }
+
+ return DONE;
+}
+
+/* validate resource/locks on POST, then pass to the default handler */
+static int dav_method_post(request_rec *r)
+{
+ dav_resource *resource;
+ dav_error *err;
+
+ /* Ask repository module to resolve the resource */
+ err = dav_get_resource(r, 0 /* label_allowed */, 0 /* use_checked_in */,
+ &resource);
+ if (err != NULL)
+ return dav_handle_err(r, err, NULL);
+
+ /* check for any method preconditions */
+ if (dav_run_method_precondition(r, resource, NULL, NULL, &err) != DECLINED
+ && err) {
+ return dav_handle_err(r, err, NULL);
+ }
+
+ /* Note: depth == 0. Implies no need for a multistatus response. */
+ if ((err = dav_validate_request(r, resource, 0, NULL, NULL,
+ DAV_VALIDATE_RESOURCE, NULL)) != NULL) {
+ /* ### add a higher-level description? */
+ return dav_handle_err(r, err, NULL);
+ }
+
+ return DECLINED;
+}
+
+/* handle the PUT method */
+static int dav_method_put(request_rec *r)
+{
+ dav_resource *resource;
+ int resource_state;
+ dav_auto_version_info av_info;
+ const dav_hooks_locks *locks_hooks = DAV_GET_HOOKS_LOCKS(r);
+ const char *body;
+ dav_error *err;
+ dav_error *err2;
+ dav_stream_mode mode;
+ dav_stream *stream;
+ dav_response *multi_response;
+ int has_range;
+ apr_off_t range_start;
+ apr_off_t range_end;
+
+ /* Ask repository module to resolve the resource */
+ err = dav_get_resource(r, 0 /* label_allowed */, 0 /* use_checked_in */,
+ &resource);
+ if (err != NULL)
+ return dav_handle_err(r, err, NULL);
+
+ /* check for any method preconditions */
+ if (dav_run_method_precondition(r, resource, NULL, NULL, &err) != DECLINED
+ && err) {
+ return dav_handle_err(r, err, NULL);
+ }
+
+ /* If not a file or collection resource, PUT not allowed */
+ if (resource->type != DAV_RESOURCE_TYPE_REGULAR
+ && resource->type != DAV_RESOURCE_TYPE_WORKING) {
+ body = apr_psprintf(r->pool,
+ "Cannot create resource %s with PUT.",
+ ap_escape_html(r->pool, r->uri));
+ return dav_error_response(r, HTTP_CONFLICT, body);
+ }
+
+ /* Cannot PUT a collection */
+ if (resource->collection) {
+ return dav_error_response(r, HTTP_CONFLICT,
+ "Cannot PUT to a collection.");
+
+ }
+
+ resource_state = dav_get_resource_state(r, resource);
+
+ /*
+ * Note: depth == 0 normally requires no multistatus response. However,
+ * if we pass DAV_VALIDATE_PARENT, then we could get an error on a URI
+ * other than the Request-URI, thereby requiring a multistatus.
+ *
+ * If the resource does not exist (DAV_RESOURCE_NULL), then we must
+ * check the resource *and* its parent. If the resource exists or is
+ * a locknull resource, then we check only the resource.
+ */
+ if ((err = dav_validate_request(r, resource, 0, NULL, &multi_response,
+ resource_state == DAV_RESOURCE_NULL ?
+ DAV_VALIDATE_PARENT :
+ DAV_VALIDATE_RESOURCE, NULL)) != NULL) {
+ /* ### add a higher-level description? */
+ return dav_handle_err(r, err, multi_response);
+ }
+
+ has_range = dav_parse_range(r, &range_start, &range_end);
+ if (has_range < 0) {
+ /* RFC 2616 14.16: If we receive an invalid Content-Range we must
+ * not use the content.
+ */
+ body = apr_psprintf(r->pool,
+ "Malformed Content-Range header for PUT %s.",
+ ap_escape_html(r->pool, r->uri));
+ return dav_error_response(r, HTTP_BAD_REQUEST, body);
+ } else if (has_range) {
+ mode = DAV_MODE_WRITE_SEEKABLE;
+ }
+ else {
+ mode = DAV_MODE_WRITE_TRUNC;
+ }
+
+ /* make sure the resource can be modified (if versioning repository) */
+ if ((err = dav_auto_checkout(r, resource,
+ 0 /* not parent_only */,
+ &av_info)) != NULL) {
+ /* ### add a higher-level description? */
+ return dav_handle_err(r, err, NULL);
+ }
+
+ /* Create the new file in the repository */
+ if ((err = (*resource->hooks->open_stream)(resource, mode,
+ &stream)) != NULL) {
+ int status = err->status ? err->status : HTTP_FORBIDDEN;
+ if (status > 299) {
+ err = dav_push_error(r->pool, status, 0,
+ apr_psprintf(r->pool,
+ "Unable to PUT new contents for %s.",
+ ap_escape_html(r->pool, r->uri)),
+ err);
+ }
+ else {
+ err = NULL;
+ }
+ }
+
+ if (err == NULL && has_range) {
+ /* a range was provided. seek to the start */
+ err = (*resource->hooks->seek_stream)(stream, range_start);
+ }
+
+ if (err == NULL) {
+ apr_bucket_brigade *bb;
+ apr_bucket *b;
+ int seen_eos = 0;
+
+ bb = apr_brigade_create(r->pool, r->connection->bucket_alloc);
+
+ do {
+ apr_status_t rc;
+
+ rc = ap_get_brigade(r->input_filters, bb, AP_MODE_READBYTES,
+ APR_BLOCK_READ, DAV_READ_BLOCKSIZE);
+
+ if (rc != APR_SUCCESS) {
+ int http_err;
+ char *msg = ap_escape_html(r->pool, r->uri);
+ http_err = ap_map_http_request_error(rc, HTTP_BAD_REQUEST);
+ msg = apr_psprintf(r->pool, "An error occurred while reading "
+ "the request body (URI: %s)",
+ msg);
+ err = dav_new_error(r->pool, http_err, 0, rc, msg);
+ break;
+ }
+
+ for (b = APR_BRIGADE_FIRST(bb);
+ b != APR_BRIGADE_SENTINEL(bb);
+ b = APR_BUCKET_NEXT(b))
+ {
+ const char *data;
+ apr_size_t len;
+
+ if (APR_BUCKET_IS_EOS(b)) {
+ seen_eos = 1;
+ break;
+ }
+
+ if (APR_BUCKET_IS_METADATA(b)) {
+ continue;
+ }
+
+ if (err == NULL) {
+ /* write whatever we read, until we see an error */
+ rc = apr_bucket_read(b, &data, &len, APR_BLOCK_READ);
+ if (rc != APR_SUCCESS) {
+ err = dav_new_error(r->pool, HTTP_BAD_REQUEST, 0, rc,
+ apr_psprintf(r->pool,
+ "An error occurred while"
+ " reading the request body"
+ " from the bucket (URI: %s)",
+ ap_escape_html(r->pool, r->uri)));
+ break;
+ }
+
+ err = (*resource->hooks->write_stream)(stream, data, len);
+ }
+ }
+
+ apr_brigade_cleanup(bb);
+ } while (!seen_eos);
+
+ apr_brigade_destroy(bb);
+
+ err2 = (*resource->hooks->close_stream)(stream,
+ err == NULL /* commit */);
+ err = dav_join_error(err, err2);
+ }
+
+ /*
+ * Ensure that we think the resource exists now.
+ * ### eek. if an error occurred during the write and we did not commit,
+ * ### then the resource might NOT exist (e.g. dav_fs_repos.c)
+ */
+ if (err == NULL) {
+ resource->exists = 1;
+ }
+
+ /* restore modifiability of resources back to what they were */
+ err2 = dav_auto_checkin(r, resource, err != NULL /* undo if error */,
+ 0 /*unlock*/, &av_info);
+
+ /* check for errors now */
+ if (err != NULL) {
+ err = dav_join_error(err, err2); /* don't forget err2 */
+ return dav_handle_err(r, err, NULL);
+ }
+
+ if (err2 != NULL) {
+ /* just log a warning */
+ err2 = dav_push_error(r->pool, err2->status, 0,
+ "The PUT was successful, but there "
+ "was a problem automatically checking in "
+ "the resource or its parent collection.",
+ err2);
+ dav_log_err(r, err2, APLOG_WARNING);
+ }
+
+ /* ### place the Content-Type and Content-Language into the propdb */
+
+ if (locks_hooks != NULL) {
+ dav_lockdb *lockdb;
+
+ if ((err = (*locks_hooks->open_lockdb)(r, 0, 0, &lockdb)) != NULL) {
+ /* The file creation was successful, but the locking failed. */
+ err = dav_push_error(r->pool, err->status, 0,
+ "The file was PUT successfully, but there "
+ "was a problem opening the lock database "
+ "which prevents inheriting locks from the "
+ "parent resources.",
+ err);
+ return dav_handle_err(r, err, NULL);
+ }
+
+ /* notify lock system that we have created/replaced a resource */
+ err = dav_notify_created(r, lockdb, resource, resource_state, 0);
+
+ (*locks_hooks->close_lockdb)(lockdb);
+
+ if (err != NULL) {
+ /* The file creation was successful, but the locking failed. */
+ err = dav_push_error(r->pool, err->status, 0,
+ "The file was PUT successfully, but there "
+ "was a problem updating its lock "
+ "information.",
+ err);
+ return dav_handle_err(r, err, NULL);
+ }
+ }
+
+ /* NOTE: WebDAV spec, S8.7.1 states properties should be unaffected */
+
+ /* return an appropriate response (HTTP_CREATED or HTTP_NO_CONTENT) */
+ return dav_created(r, NULL, "Resource", resource_state == DAV_RESOURCE_EXISTS);
+}
+
+
+/* Use POOL to temporarily construct a dav_response object (from WRES
+ STATUS, and PROPSTATS) and stream it via WRES's ctx->brigade. */
+static void dav_stream_response(dav_walk_resource *wres,
+ int status,
+ dav_get_props_result *propstats,
+ apr_pool_t *pool)
+{
+ dav_response resp = { 0 };
+ dav_walker_ctx *ctx = wres->walk_ctx;
+
+ resp.href = wres->resource->uri;
+ resp.status = status;
+ if (propstats) {
+ resp.propresult = *propstats;
+ }
+
+ dav_send_one_response(&resp, ctx->bb, ctx->r, pool);
+}
+
+
+/* ### move this to dav_util? */
+DAV_DECLARE(void) dav_add_response(dav_walk_resource *wres,
+ int status, dav_get_props_result *propstats)
+{
+ dav_response *resp;
+
+ /* just drop some data into an dav_response */
+ resp = apr_pcalloc(wres->pool, sizeof(*resp));
+ resp->href = apr_pstrdup(wres->pool, wres->resource->uri);
+ resp->status = status;
+ if (propstats) {
+ resp->propresult = *propstats;
+ }
+
+ resp->next = wres->response;
+ wres->response = resp;
+}
+
+
+/* handle the DELETE method */
+static int dav_method_delete(request_rec *r)
+{
+ dav_resource *resource;
+ dav_auto_version_info av_info;
+ dav_error *err;
+ dav_error *err2;
+ dav_response *multi_response;
+ int result;
+ int depth;
+
+ /* We don't use the request body right now, so torch it. */
+ if ((result = ap_discard_request_body(r)) != OK) {
+ return result;
+ }
+
+ /* Ask repository module to resolve the resource */
+ err = dav_get_resource(r, 0 /* label_allowed */, 0 /* use_checked_in */,
+ &resource);
+ if (err != NULL)
+ return dav_handle_err(r, err, NULL);
+
+ /* check for any method preconditions */
+ if (dav_run_method_precondition(r, resource, NULL, NULL, &err) != DECLINED
+ && err) {
+ return dav_handle_err(r, err, NULL);
+ }
+
+ if (!resource->exists) {
+ /* Apache will supply a default error for this. */
+ return HTTP_NOT_FOUND;
+ }
+
+ /* 2518 says that depth must be infinity only for collections.
+ * For non-collections, depth is ignored, unless it is an illegal value (1).
+ */
+ depth = dav_get_depth(r, DAV_INFINITY);
+
+ if (resource->collection && depth != DAV_INFINITY) {
+ /* This supplies additional information for the default message. */
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00582)
+ "Depth must be \"infinity\" for DELETE of a collection.");
+ return HTTP_BAD_REQUEST;
+ }
+
+ if (!resource->collection && depth == 1) {
+ /* This supplies additional information for the default message. */
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00583)
+ "Depth of \"1\" is not allowed for DELETE.");
+ return HTTP_BAD_REQUEST;
+ }
+
+ /*
+ ** If any resources fail the lock/If: conditions, then we must fail
+ ** the delete. Each of the failing resources will be listed within
+ ** a DAV:multistatus body, wrapped into a 424 response.
+ **
+ ** Note that a failure on the resource itself does not generate a
+ ** multistatus response -- only internal members/collections.
+ */
+ if ((err = dav_validate_request(r, resource, depth, NULL,
+ &multi_response,
+ DAV_VALIDATE_PARENT
+ | DAV_VALIDATE_USE_424, NULL)) != NULL) {
+ err = dav_push_error(r->pool, err->status, 0,
+ apr_psprintf(r->pool,
+ "Could not DELETE %s due to a failed "
+ "precondition (e.g. locks).",
+ ap_escape_html(r->pool, r->uri)),
+ err);
+ return dav_handle_err(r, err, multi_response);
+ }
+
+ /* ### RFC 2518 s. 8.10.5 says to remove _all_ locks, not just those
+ * locked by the token(s) in the if_header.
+ */
+ if ((result = dav_unlock(r, resource, NULL)) != OK) {
+ return result;
+ }
+
+ /* if versioned resource, make sure parent is checked out */
+ if ((err = dav_auto_checkout(r, resource, 1 /* parent_only */,
+ &av_info)) != NULL) {
+ /* ### add a higher-level description? */
+ return dav_handle_err(r, err, NULL);
+ }
+
+ /* try to remove the resource */
+ err = (*resource->hooks->remove_resource)(resource, &multi_response);
+
+ /* restore writability of parent back to what it was */
+ err2 = dav_auto_checkin(r, NULL, err != NULL /* undo if error */,
+ 0 /*unlock*/, &av_info);
+
+ /* check for errors now */
+ if (err != NULL) {
+ err = dav_push_error(r->pool, err->status, 0,
+ apr_psprintf(r->pool,
+ "Could not DELETE %s.",
+ ap_escape_html(r->pool, r->uri)),
+ err);
+ return dav_handle_err(r, err, multi_response);
+ }
+ if (err2 != NULL) {
+ /* just log a warning */
+ err = dav_push_error(r->pool, err2->status, 0,
+ "The DELETE was successful, but there "
+ "was a problem automatically checking in "
+ "the parent collection.",
+ err2);
+ dav_log_err(r, err, APLOG_WARNING);
+ }
+
+ /* ### HTTP_NO_CONTENT if no body, HTTP_OK if there is a body (some day) */
+
+ /* Apache will supply a default error for this. */
+ return HTTP_NO_CONTENT;
+}
+
+/* generate DAV:supported-method-set OPTIONS response */
+static dav_error *dav_gen_supported_methods(request_rec *r,
+ const apr_xml_elem *elem,
+ const apr_table_t *methods,
+ apr_text_header *body)
+{
+ const apr_array_header_t *arr;
+ const apr_table_entry_t *elts;
+ apr_xml_elem *child;
+ apr_xml_attr *attr;
+ char *s;
+ int i;
+
+ apr_text_append(r->pool, body, "<D:supported-method-set>" DEBUG_CR);
+
+ if (elem->first_child == NULL) {
+ /* show all supported methods */
+ arr = apr_table_elts(methods);
+ elts = (const apr_table_entry_t *)arr->elts;
+
+ for (i = 0; i < arr->nelts; ++i) {
+ if (elts[i].key == NULL)
+ continue;
+
+ s = apr_pstrcat(r->pool,
+ "<D:supported-method D:name=\"",
+ elts[i].key,
+ "\"/>" DEBUG_CR, NULL);
+ apr_text_append(r->pool, body, s);
+ }
+ }
+ else {
+ /* check for support of specific methods */
+ for (child = elem->first_child; child != NULL; child = child->next) {
+ if (child->ns == APR_XML_NS_DAV_ID
+ && strcmp(child->name, "supported-method") == 0) {
+ const char *name = NULL;
+
+ /* go through attributes to find method name */
+ for (attr = child->attr; attr != NULL; attr = attr->next) {
+ if (attr->ns == APR_XML_NS_DAV_ID
+ && strcmp(attr->name, "name") == 0)
+ name = attr->value;
+ }
+
+ if (name == NULL) {
+ return dav_new_error(r->pool, HTTP_BAD_REQUEST, 0, 0,
+ "A DAV:supported-method element "
+ "does not have a \"name\" attribute");
+ }
+
+ /* see if method is supported */
+ if (apr_table_get(methods, name) != NULL) {
+ s = apr_pstrcat(r->pool,
+ "<D:supported-method D:name=\"",
+ name, "\"/>" DEBUG_CR, NULL);
+ apr_text_append(r->pool, body, s);
+ }
+ }
+ }
+ }
+
+ apr_text_append(r->pool, body, "</D:supported-method-set>" DEBUG_CR);
+ return NULL;
+}
+
+/* generate DAV:supported-live-property-set OPTIONS response */
+static dav_error *dav_gen_supported_live_props(request_rec *r,
+ const dav_resource *resource,
+ const apr_xml_elem *elem,
+ apr_text_header *body)
+{
+ dav_lockdb *lockdb;
+ dav_propdb *propdb;
+ apr_xml_elem *child;
+ apr_xml_attr *attr;
+ dav_error *err;
+
+ /* open lock database, to report on supported lock properties */
+ if ((err = dav_open_lockdb(r, 1, &lockdb)) != NULL) {
+ return dav_push_error(r->pool, err->status, 0,
+ "The lock database could not be opened, "
+ "preventing the reporting of supported lock "
+ "properties.",
+ err);
+ }
+
+ /* open the property database (readonly) for the resource */
+ if ((err = dav_open_propdb(r, lockdb, resource, DAV_PROPDB_RO, NULL,
+ &propdb)) != NULL) {
+ if (lockdb != NULL)
+ (*lockdb->hooks->close_lockdb)(lockdb);
+
+ return dav_push_error(r->pool, err->status, 0,
+ "The property database could not be opened, "
+ "preventing report of supported properties.",
+ err);
+ }
+
+ apr_text_append(r->pool, body, "<D:supported-live-property-set>" DEBUG_CR);
+
+ if (elem->first_child == NULL) {
+ /* show all supported live properties */
+ dav_get_props_result props = dav_get_allprops(propdb, DAV_PROP_INSERT_SUPPORTED);
+ body->last->next = props.propstats;
+ while (body->last->next != NULL)
+ body->last = body->last->next;
+ }
+ else {
+ /* check for support of specific live property */
+ for (child = elem->first_child; child != NULL; child = child->next) {
+ if (child->ns == APR_XML_NS_DAV_ID
+ && strcmp(child->name, "supported-live-property") == 0) {
+ const char *name = NULL;
+ const char *nmspace = NULL;
+
+ /* go through attributes to find name and namespace */
+ for (attr = child->attr; attr != NULL; attr = attr->next) {
+ if (attr->ns == APR_XML_NS_DAV_ID) {
+ if (strcmp(attr->name, "name") == 0)
+ name = attr->value;
+ else if (strcmp(attr->name, "namespace") == 0)
+ nmspace = attr->value;
+ }
+ }
+
+ if (name == NULL) {
+ err = dav_new_error(r->pool, HTTP_BAD_REQUEST, 0, 0,
+ "A DAV:supported-live-property "
+ "element does not have a \"name\" "
+ "attribute");
+ break;
+ }
+
+ /* default namespace to DAV: */
+ if (nmspace == NULL)
+ nmspace = "DAV:";
+
+ /* check for support of property */
+ dav_get_liveprop_supported(propdb, nmspace, name, body);
+ }
+ }
+ }
+
+ apr_text_append(r->pool, body, "</D:supported-live-property-set>" DEBUG_CR);
+
+ dav_close_propdb(propdb);
+
+ if (lockdb != NULL)
+ (*lockdb->hooks->close_lockdb)(lockdb);
+
+ return err;
+}
+
+
+/* generate DAV:supported-report-set OPTIONS response */
+static dav_error *dav_gen_supported_reports(request_rec *r,
+ const dav_resource *resource,
+ const apr_xml_elem *elem,
+ apr_text_header *body)
+{
+ apr_xml_elem *child;
+ apr_xml_attr *attr;
+ dav_error *err = NULL;
+ char *s;
+ apr_array_header_t *reports;
+ const dav_report_elem *rp;
+
+ apr_text_append(r->pool, body, "<D:supported-report-set>" DEBUG_CR);
+
+ reports = apr_array_make(r->pool, 5, sizeof(const char *));
+ dav_run_gather_reports(r, resource, reports, &err);
+ if (err != NULL) {
+ return dav_push_error(r->pool, err->status, 0,
+ "DAV:supported-report-set could not be "
+ "determined due to a problem fetching the "
+ "available reports for this resource.",
+ err);
+ }
+
+ if (elem->first_child == NULL) {
+ int i;
+
+ /* show all supported reports */
+ rp = (const dav_report_elem *)reports->elts;
+ for (i = 0; i < reports->nelts; i++, rp++) {
+ /* Note: we presume reports->namespace is
+ * properly XML/URL quoted */
+ s = apr_pstrcat(r->pool,
+ "<D:supported-report D:name=\"",
+ rp->name,
+ "\" D:namespace=\"",
+ rp->nmspace,
+ "\"/>" DEBUG_CR, NULL);
+ apr_text_append(r->pool, body, s);
+ }
+ }
+ else {
+ /* check for support of specific report */
+ for (child = elem->first_child; child != NULL; child = child->next) {
+ if (child->ns == APR_XML_NS_DAV_ID
+ && strcmp(child->name, "supported-report") == 0) {
+ const char *name = NULL;
+ const char *nmspace = NULL;
+ int i;
+
+ /* go through attributes to find name and namespace */
+ for (attr = child->attr; attr != NULL; attr = attr->next) {
+ if (attr->ns == APR_XML_NS_DAV_ID) {
+ if (strcmp(attr->name, "name") == 0)
+ name = attr->value;
+ else if (strcmp(attr->name, "namespace") == 0)
+ nmspace = attr->value;
+ }
+ }
+
+ if (name == NULL) {
+ return dav_new_error(r->pool, HTTP_BAD_REQUEST, 0, 0,
+ "A DAV:supported-report element "
+ "does not have a \"name\" attribute");
+ }
+
+ /* default namespace to DAV: */
+ if (nmspace == NULL) {
+ nmspace = "DAV:";
+ }
+
+ rp = (const dav_report_elem *)reports->elts;
+ for (i = 0; i < reports->nelts; i++, rp++) {
+ if (strcmp(name, rp->name) == 0
+ && strcmp(nmspace, rp->nmspace) == 0) {
+ /* Note: we presume reports->nmspace is
+ * properly XML/URL quoted
+ */
+ s = apr_pstrcat(r->pool,
+ "<D:supported-report "
+ "D:name=\"",
+ rp->name,
+ "\" D:namespace=\"",
+ rp->nmspace,
+ "\"/>" DEBUG_CR, NULL);
+ apr_text_append(r->pool, body, s);
+ break;
+ }
+ }
+ }
+ }
+ }
+
+ apr_text_append(r->pool, body, "</D:supported-report-set>" DEBUG_CR);
+ return NULL;
+}
+
+
+/* handle the SEARCH method */
+static int dav_method_search(request_rec *r)
+{
+ const dav_hooks_search *search_hooks = DAV_GET_HOOKS_SEARCH(r);
+ dav_resource *resource;
+ dav_error *err;
+ dav_response *multi_status;
+
+ /* If no search provider, decline the request */
+ if (search_hooks == NULL)
+ return DECLINED;
+
+ /* This method should only be called when the resource is not
+ * visible to Apache. We will fetch the resource from the repository,
+ * then create a subrequest for Apache to handle.
+ */
+ err = dav_get_resource(r, 1 /* label_allowed */, 0 /* use_checked_in */,
+ &resource);
+ if (err != NULL)
+ return dav_handle_err(r, err, NULL);
+
+ if (!resource->exists) {
+ /* Apache will supply a default error for this. */
+ return HTTP_NOT_FOUND;
+ }
+
+ /* set up the HTTP headers for the response */
+ if ((err = (*resource->hooks->set_headers)(r, resource)) != NULL) {
+ err = dav_push_error(r->pool, err->status, 0,
+ "Unable to set up HTTP headers.",
+ err);
+ return dav_handle_err(r, err, NULL);
+ }
+
+ if (r->header_only) {
+ return DONE;
+ }
+
+ /* okay... time to search the content */
+ /* Let's validate XML and process walk function
+ * in the hook function
+ */
+ if ((err = (*search_hooks->search_resource)(r, &multi_status)) != NULL) {
+ /* ### add a higher-level description? */
+ return dav_handle_err(r, err, NULL);
+ }
+
+ /* We have results in multi_status */
+ /* Should I pass namespace?? */
+ dav_send_multistatus(r, HTTP_MULTI_STATUS, multi_status, NULL);
+
+ return DONE;
+}
+
+
+/* handle the OPTIONS method */
+static int dav_method_options(request_rec *r)
+{
+ const dav_hooks_locks *locks_hooks = DAV_GET_HOOKS_LOCKS(r);
+ const dav_hooks_vsn *vsn_hooks = DAV_GET_HOOKS_VSN(r);
+ const dav_hooks_binding *binding_hooks = DAV_GET_HOOKS_BINDING(r);
+ const dav_hooks_search *search_hooks = DAV_GET_HOOKS_SEARCH(r);
+ dav_resource *resource;
+ const char *dav_level;
+ char *allow;
+ char *s;
+ const apr_array_header_t *arr;
+ const apr_table_entry_t *elts;
+ apr_table_t *methods = apr_table_make(r->pool, 12);
+ apr_text_header vsn_options = { 0 };
+ apr_text_header body = { 0 };
+ apr_text *t;
+ int text_size;
+ int result;
+ int i;
+ apr_array_header_t *uri_ary;
+ apr_xml_doc *doc;
+ const apr_xml_elem *elem;
+ dav_error *err;
+
+ apr_array_header_t *extensions;
+ ap_list_provider_names_t *entry;
+
+ /* resolve the resource */
+ err = dav_get_resource(r, 0 /* label_allowed */, 0 /* use_checked_in */,
+ &resource);
+ if (err != NULL)
+ return dav_handle_err(r, err, NULL);
+
+ /* parse any request body */
+ if ((result = ap_xml_parse_input(r, &doc)) != OK) {
+ return result;
+ }
+ /* note: doc == NULL if no request body */
+
+ /* check for any method preconditions */
+ if (dav_run_method_precondition(r, resource, NULL, doc, &err) != DECLINED
+ && err) {
+ return dav_handle_err(r, err, NULL);
+ }
+
+ if (doc && !dav_validate_root(doc, "options")) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00584)
+ "The \"options\" element was not found.");
+ return HTTP_BAD_REQUEST;
+ }
+
+ /* determine which providers are available */
+ dav_level = "1";
+
+ if (locks_hooks != NULL) {
+ dav_level = "1,2";
+ }
+
+ if (binding_hooks != NULL)
+ dav_level = apr_pstrcat(r->pool, dav_level, ",bindings", NULL);
+
+ /* DAV header additions registered by external modules */
+ extensions = ap_list_provider_names(r->pool, DAV_OPTIONS_EXTENSION_GROUP, "0");
+ entry = (ap_list_provider_names_t *)extensions->elts;
+
+ for (i = 0; i < extensions->nelts; i++, entry++) {
+ const dav_options_provider *options =
+ dav_get_options_providers(entry->provider_name);
+
+ if (options && options->dav_header) {
+ apr_text_header hoptions = { 0 };
+
+ options->dav_header(r, resource, &hoptions);
+ for (t = hoptions.first; t && t->text; t = t->next)
+ dav_level = apr_pstrcat(r->pool, dav_level, ",", t->text, NULL);
+ }
+ }
+
+ /* ###
+ * MSFT Web Folders chokes if length of DAV header value > 63 characters!
+ * To workaround that, we use separate DAV headers for versioning and
+ * live prop provider namespace URIs.
+ * ###
+ */
+ apr_table_setn(r->headers_out, "DAV", dav_level);
+
+ /*
+ * If there is a versioning provider, generate DAV headers
+ * for versioning options.
+ */
+ if (vsn_hooks != NULL) {
+ (*vsn_hooks->get_vsn_options)(r->pool, &vsn_options);
+
+ for (t = vsn_options.first; t != NULL; t = t->next)
+ apr_table_addn(r->headers_out, "DAV", t->text);
+ }
+
+ /*
+ * Gather property set URIs from all the liveprop providers,
+ * and generate a separate DAV header for each URI, to avoid
+ * problems with long header lengths.
+ */
+ uri_ary = apr_array_make(r->pool, 5, sizeof(const char *));
+ dav_run_gather_propsets(uri_ary);
+ for (i = 0; i < uri_ary->nelts; ++i) {
+ if (((char **)uri_ary->elts)[i] != NULL)
+ apr_table_addn(r->headers_out, "DAV", ((char **)uri_ary->elts)[i]);
+ }
+
+ /* this tells MSFT products to skip looking for FrontPage extensions */
+ apr_table_setn(r->headers_out, "MS-Author-Via", "DAV");
+
+ /*
+ * Determine which methods are allowed on the resource.
+ * Three cases: resource is null (3), is lock-null (7.4), or exists.
+ *
+ * All cases support OPTIONS, and if there is a lock provider, LOCK.
+ * (Lock-) null resources also support MKCOL and PUT.
+ * Lock-null supports PROPFIND and UNLOCK.
+ * Existing resources support lots of stuff.
+ */
+
+ apr_table_addn(methods, "OPTIONS", "");
+
+ /* ### take into account resource type */
+ switch (dav_get_resource_state(r, resource))
+ {
+ case DAV_RESOURCE_EXISTS:
+ /* resource exists */
+ apr_table_addn(methods, "GET", "");
+ apr_table_addn(methods, "HEAD", "");
+ apr_table_addn(methods, "POST", "");
+ apr_table_addn(methods, "DELETE", "");
+ apr_table_addn(methods, "TRACE", "");
+ apr_table_addn(methods, "PROPFIND", "");
+ apr_table_addn(methods, "PROPPATCH", "");
+ apr_table_addn(methods, "COPY", "");
+ apr_table_addn(methods, "MOVE", "");
+
+ if (!resource->collection)
+ apr_table_addn(methods, "PUT", "");
+
+ if (locks_hooks != NULL) {
+ apr_table_addn(methods, "LOCK", "");
+ apr_table_addn(methods, "UNLOCK", "");
+ }
+
+ break;
+
+ case DAV_RESOURCE_LOCK_NULL:
+ /* resource is lock-null. */
+ apr_table_addn(methods, "MKCOL", "");
+ apr_table_addn(methods, "PROPFIND", "");
+ apr_table_addn(methods, "PUT", "");
+
+ if (locks_hooks != NULL) {
+ apr_table_addn(methods, "LOCK", "");
+ apr_table_addn(methods, "UNLOCK", "");
+ }
+
+ break;
+
+ case DAV_RESOURCE_NULL:
+ /* resource is null. */
+ apr_table_addn(methods, "MKCOL", "");
+ apr_table_addn(methods, "PUT", "");
+
+ if (locks_hooks != NULL)
+ apr_table_addn(methods, "LOCK", "");
+
+ break;
+
+ default:
+ /* ### internal error! */
+ break;
+ }
+
+ /* If there is a versioning provider, add versioning methods */
+ if (vsn_hooks != NULL) {
+ if (!resource->exists) {
+ if ((*vsn_hooks->versionable)(resource))
+ apr_table_addn(methods, "VERSION-CONTROL", "");
+
+ if (vsn_hooks->can_be_workspace != NULL
+ && (*vsn_hooks->can_be_workspace)(resource))
+ apr_table_addn(methods, "MKWORKSPACE", "");
+
+ if (vsn_hooks->can_be_activity != NULL
+ && (*vsn_hooks->can_be_activity)(resource))
+ apr_table_addn(methods, "MKACTIVITY", "");
+ }
+ else if (!resource->versioned) {
+ if ((*vsn_hooks->versionable)(resource))
+ apr_table_addn(methods, "VERSION-CONTROL", "");
+ }
+ else if (resource->working) {
+ apr_table_addn(methods, "CHECKIN", "");
+
+ /* ### we might not support this DeltaV option */
+ apr_table_addn(methods, "UNCHECKOUT", "");
+ }
+ else if (vsn_hooks->add_label != NULL) {
+ apr_table_addn(methods, "CHECKOUT", "");
+ apr_table_addn(methods, "LABEL", "");
+ }
+ else {
+ apr_table_addn(methods, "CHECKOUT", "");
+ }
+ }
+
+ /* If there is a bindings provider, see if resource is bindable */
+ if (binding_hooks != NULL
+ && (*binding_hooks->is_bindable)(resource)) {
+ apr_table_addn(methods, "BIND", "");
+ }
+
+ /* If there is a search provider, set SEARCH in option */
+ if (search_hooks != NULL) {
+ apr_table_addn(methods, "SEARCH", "");
+ }
+
+ /* additional methods registered by external modules */
+ extensions = ap_list_provider_names(r->pool, DAV_OPTIONS_EXTENSION_GROUP, "0");
+ entry = (ap_list_provider_names_t *)extensions->elts;
+
+ for (i = 0; i < extensions->nelts; i++, entry++) {
+ const dav_options_provider *options =
+ dav_get_options_providers(entry->provider_name);
+
+ if (options && options->dav_method) {
+ apr_text_header hoptions = { 0 };
+
+ options->dav_method(r, resource, &hoptions);
+ for (t = hoptions.first; t && t->text; t = t->next)
+ apr_table_addn(methods, t->text, "");
+ }
+ }
+
+ /* Generate the Allow header */
+ arr = apr_table_elts(methods);
+ elts = (const apr_table_entry_t *)arr->elts;
+ text_size = 0;
+
+ /* first, compute total length */
+ for (i = 0; i < arr->nelts; ++i) {
+ if (elts[i].key == NULL)
+ continue;
+
+ /* add 1 for comma or null */
+ text_size += strlen(elts[i].key) + 1;
+ }
+
+ s = allow = apr_palloc(r->pool, text_size);
+
+ for (i = 0; i < arr->nelts; ++i) {
+ if (elts[i].key == NULL)
+ continue;
+
+ if (s != allow)
+ *s++ = ',';
+
+ strcpy(s, elts[i].key);
+ s += strlen(s);
+ }
+
+ apr_table_setn(r->headers_out, "Allow", allow);
+
+
+ /* If there is search set_option_head function, set head */
+ /* DASL: <DAV:basicsearch>
+ * DASL: <http://foo.bar.com/syntax1>
+ * DASL: <http://akuma.com/syntax2>
+ */
+ if (search_hooks != NULL
+ && *search_hooks->set_option_head != NULL) {
+ if ((err = (*search_hooks->set_option_head)(r)) != NULL) {
+ return dav_handle_err(r, err, NULL);
+ }
+ }
+
+ /* if there was no request body, then there is no response body */
+ if (doc == NULL) {
+ ap_set_content_length(r, 0);
+
+ /* ### this sends a Content-Type. the default OPTIONS does not. */
+
+ /* ### the default (ap_send_http_options) returns OK, but I believe
+ * ### that is because it is the default handler and nothing else
+ * ### will run after the thing. */
+ return DONE;
+ }
+
+ /* handle each options request */
+ for (elem = doc->root->first_child; elem != NULL; elem = elem->next) {
+ /* check for something we recognize first */
+ int core_option = 0;
+ dav_error *err = NULL;
+
+ if (elem->ns == APR_XML_NS_DAV_ID) {
+ if (strcmp(elem->name, "supported-method-set") == 0) {
+ err = dav_gen_supported_methods(r, elem, methods, &body);
+ core_option = 1;
+ }
+ else if (strcmp(elem->name, "supported-live-property-set") == 0) {
+ err = dav_gen_supported_live_props(r, resource, elem, &body);
+ core_option = 1;
+ }
+ else if (strcmp(elem->name, "supported-report-set") == 0) {
+ err = dav_gen_supported_reports(r, resource, elem, &body);
+ core_option = 1;
+ }
+ }
+
+ if (err != NULL)
+ return dav_handle_err(r, err, NULL);
+
+ /* if unrecognized option, pass to versioning provider */
+ if (!core_option && vsn_hooks != NULL) {
+ if ((err = (*vsn_hooks->get_option)(resource, elem, &body))
+ != NULL) {
+ return dav_handle_err(r, err, NULL);
+ }
+ }
+ }
+
+ /* send the options response */
+ r->status = HTTP_OK;
+ ap_set_content_type(r, DAV_XML_CONTENT_TYPE);
+
+ /* send the headers and response body */
+ ap_rputs(DAV_XML_HEADER DEBUG_CR
+ "<D:options-response xmlns:D=\"DAV:\">" DEBUG_CR, r);
+
+ for (t = body.first; t != NULL; t = t->next)
+ ap_rputs(t->text, r);
+
+ ap_rputs("</D:options-response>" DEBUG_CR, r);
+
+ /* we've sent everything necessary to the client. */
+ return DONE;
+}
+
+static void dav_cache_badprops(dav_walker_ctx *ctx)
+{
+ const apr_xml_elem *elem;
+ apr_text_header hdr = { 0 };
+
+ /* just return if we built the thing already */
+ if (ctx->propstat_404 != NULL) {
+ return;
+ }
+
+ apr_text_append(ctx->w.pool, &hdr,
+ "<D:propstat>" DEBUG_CR
+ "<D:prop>" DEBUG_CR);
+
+ elem = dav_find_child(ctx->doc->root, "prop");
+ for (elem = elem->first_child; elem; elem = elem->next) {
+ apr_text_append(ctx->w.pool, &hdr,
+ apr_xml_empty_elem(ctx->w.pool, elem));
+ }
+
+ apr_text_append(ctx->w.pool, &hdr,
+ "</D:prop>" DEBUG_CR
+ "<D:status>HTTP/1.1 404 Not Found</D:status>" DEBUG_CR
+ "</D:propstat>" DEBUG_CR);
+
+ ctx->propstat_404 = hdr.first;
+}
+
+static dav_error * dav_propfind_walker(dav_walk_resource *wres, int calltype)
+{
+ dav_walker_ctx *ctx = wres->walk_ctx;
+ dav_dir_conf *conf;
+ int flags = DAV_PROPDB_RO;
+ dav_error *err;
+ dav_propdb *propdb;
+ dav_get_props_result propstats = { 0 };
+
+ /* check for any method preconditions */
+ if (dav_run_method_precondition(ctx->r, NULL, wres->resource, ctx->doc, &err) != DECLINED
+ && err) {
+ apr_pool_clear(ctx->scratchpool);
+ return NULL;
+ }
+
+ conf = ap_get_module_config(ctx->r->per_dir_config, &dav_module);
+ if (conf && conf->allow_lockdiscovery == DAV_ENABLED_OFF)
+ flags |= DAV_PROPDB_DISABLE_LOCKDISCOVERY;
+
+ /*
+ ** Note: ctx->doc can only be NULL for DAV_PROPFIND_IS_ALLPROP. Since
+ ** dav_get_allprops() does not need to do namespace translation,
+ ** we're okay.
+ **
+ ** Note: we cast to lose the "const". The propdb won't try to change
+ ** the resource, however, since we are opening readonly.
+ */
+ err = dav_popen_propdb(ctx->scratchpool,
+ ctx->r, ctx->w.lockdb, wres->resource, flags,
+ ctx->doc ? ctx->doc->namespaces : NULL, &propdb);
+ if (err != NULL) {
+ /* ### do something with err! */
+
+ if (ctx->propfind_type == DAV_PROPFIND_IS_PROP) {
+ dav_get_props_result badprops = { 0 };
+
+ /* some props were expected on this collection/resource */
+ dav_cache_badprops(ctx);
+ badprops.propstats = ctx->propstat_404;
+ dav_stream_response(wres, 0, &badprops, ctx->scratchpool);
+ }
+ else {
+ /* no props on this collection/resource */
+ dav_stream_response(wres, HTTP_OK, NULL, ctx->scratchpool);
+ }
+
+ apr_pool_clear(ctx->scratchpool);
+ return NULL;
+ }
+ /* ### what to do about closing the propdb on server failure? */
+
+ if (ctx->propfind_type == DAV_PROPFIND_IS_PROP) {
+ propstats = dav_get_props(propdb, ctx->doc);
+ }
+ else {
+ dav_prop_insert what = ctx->propfind_type == DAV_PROPFIND_IS_ALLPROP
+ ? DAV_PROP_INSERT_VALUE
+ : DAV_PROP_INSERT_NAME;
+ propstats = dav_get_allprops(propdb, what);
+ }
+ dav_stream_response(wres, 0, &propstats, ctx->scratchpool);
+
+ dav_close_propdb(propdb);
+
+ /* at this point, ctx->scratchpool has been used to stream a
+ single response. this function fully controls the pool, and
+ thus has the right to clear it for the next iteration of this
+ callback. */
+ apr_pool_clear(ctx->scratchpool);
+
+ return NULL;
+}
+
+/* handle the PROPFIND method */
+static int dav_method_propfind(request_rec *r)
+{
+ dav_resource *resource;
+ int depth;
+ dav_error *err;
+ int result;
+ apr_xml_doc *doc;
+ dav_walker_ctx ctx = { { 0 } };
+ dav_response *multi_status;
+
+ /* Ask repository module to resolve the resource */
+ err = dav_get_resource(r, 1 /* label_allowed */, 0 /* use_checked_in */,
+ &resource);
+ if (err != NULL)
+ return dav_handle_err(r, err, NULL);
+
+ if ((result = ap_xml_parse_input(r, &doc)) != OK) {
+ return result;
+ }
+ /* note: doc == NULL if no request body */
+
+ /* check for any method preconditions */
+ if (dav_run_method_precondition(r, resource, NULL, doc, &err) != DECLINED
+ && err) {
+ return dav_handle_err(r, err, NULL);
+ }
+
+ if (dav_get_resource_state(r, resource) == DAV_RESOURCE_NULL) {
+ /* Apache will supply a default error for this. */
+ return HTTP_NOT_FOUND;
+ }
+
+ if ((depth = dav_get_depth(r, DAV_INFINITY)) < 0) {
+ /* dav_get_depth() supplies additional information for the
+ * default message. */
+ return HTTP_BAD_REQUEST;
+ }
+
+ if (depth == DAV_INFINITY && resource->collection) {
+ dav_dir_conf *conf;
+ conf = (dav_dir_conf *)ap_get_module_config(r->per_dir_config,
+ &dav_module);
+ /* default is to DISALLOW these requests */
+ if (conf->allow_depthinfinity != DAV_ENABLED_ON) {
+ return dav_error_response(r, HTTP_FORBIDDEN,
+ apr_psprintf(r->pool,
+ "PROPFIND requests with a "
+ "Depth of \"infinity\" are "
+ "not allowed for %s.",
+ ap_escape_html(r->pool,
+ r->uri)));
+ }
+ }
+
+ if (doc && !dav_validate_root(doc, "propfind")) {
+ /* This supplies additional information for the default message. */
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00585)
+ "The \"propfind\" element was not found.");
+ return HTTP_BAD_REQUEST;
+ }
+
+ /* ### validate that only one of these three elements is present */
+
+ if (doc == NULL || dav_find_child(doc->root, "allprop") != NULL) {
+ /* note: no request body implies allprop */
+ ctx.propfind_type = DAV_PROPFIND_IS_ALLPROP;
+ }
+ else if (dav_find_child(doc->root, "propname") != NULL) {
+ ctx.propfind_type = DAV_PROPFIND_IS_PROPNAME;
+ }
+ else if (dav_find_child(doc->root, "prop") != NULL) {
+ ctx.propfind_type = DAV_PROPFIND_IS_PROP;
+ }
+ else {
+ /* "propfind" element must have one of the above three children */
+
+ /* This supplies additional information for the default message. */
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00586)
+ "The \"propfind\" element does not contain one of "
+ "the required child elements (the specific command).");
+ return HTTP_BAD_REQUEST;
+ }
+
+ ctx.w.walk_type = DAV_WALKTYPE_NORMAL | DAV_WALKTYPE_AUTH;
+ ctx.w.func = dav_propfind_walker;
+ ctx.w.walk_ctx = &ctx;
+ ctx.w.pool = r->pool;
+ ctx.w.root = resource;
+
+ ctx.doc = doc;
+ ctx.r = r;
+ ctx.bb = apr_brigade_create(r->pool, r->connection->bucket_alloc);
+ apr_pool_create(&ctx.scratchpool, r->pool);
+ apr_pool_tag(ctx.scratchpool, "mod_dav-scratch");
+
+ if ((err = dav_open_lockdb(r, 1, &ctx.w.lockdb)) != NULL) {
+ err = dav_push_error(r->pool, err->status, 0,
+ "The lock database could not be opened, "
+ "preventing access to the various lock "
+ "properties for the PROPFIND.",
+ err);
+ return dav_handle_err(r, err, NULL);
+ }
+ if (ctx.w.lockdb != NULL) {
+ /* if we have a lock database, then we can walk locknull resources */
+ ctx.w.walk_type |= DAV_WALKTYPE_LOCKNULL;
+ }
+
+ /* send <multistatus> tag, with all doc->namespaces attached. */
+
+ /* NOTE: we *cannot* leave out the doc's namespaces from the
+ initial <multistatus> tag. if a 404 was generated for an HREF,
+ then we need to spit out the doc's namespaces for use by the
+ 404. Note that <response> elements will override these ns0,
+ ns1, etc, but NOT within the <response> scope for the
+ badprops. */
+ dav_begin_multistatus(ctx.bb, r, HTTP_MULTI_STATUS,
+ doc ? doc->namespaces : NULL);
+
+ /* Have the provider walk the resource. */
+ err = (*resource->hooks->walk)(&ctx.w, depth, &multi_status);
+
+ if (ctx.w.lockdb != NULL) {
+ (*ctx.w.lockdb->hooks->close_lockdb)(ctx.w.lockdb);
+ }
+
+ if (err != NULL) {
+ /* If an error occurred during the resource walk, there's
+ basically nothing we can do but abort the connection and
+ log an error. This is one of the limitations of HTTP; it
+ needs to "know" the entire status of the response before
+ generating it, which is just impossible in these streamy
+ response situations. */
+ err = dav_push_error(r->pool, err->status, 0,
+ "Provider encountered an error while streaming"
+ " a multistatus PROPFIND response.", err);
+ dav_log_err(r, err, APLOG_ERR);
+ r->connection->aborted = 1;
+ return DONE;
+ }
+
+ dav_finish_multistatus(r, ctx.bb);
+
+ /* the response has been sent. */
+ return DONE;
+}
+
+DAV_DECLARE(apr_text *) dav_failed_proppatch(apr_pool_t *p,
+ apr_array_header_t *prop_ctx)
+{
+ apr_text_header hdr = { 0 };
+ int i = prop_ctx->nelts;
+ dav_prop_ctx *ctx = (dav_prop_ctx *)prop_ctx->elts;
+ dav_error *err424_set = NULL;
+ dav_error *err424_delete = NULL;
+ const char *s;
+
+ /* ### might be nice to sort by status code and description */
+
+ for ( ; i-- > 0; ++ctx ) {
+ apr_text_append(p, &hdr,
+ "<D:propstat>" DEBUG_CR
+ "<D:prop>");
+ apr_text_append(p, &hdr, apr_xml_empty_elem(p, ctx->prop));
+ apr_text_append(p, &hdr, "</D:prop>" DEBUG_CR);
+
+ if (ctx->err == NULL) {
+ /* nothing was assigned here yet, so make it a 424 */
+
+ if (ctx->operation == DAV_PROP_OP_SET) {
+ if (err424_set == NULL)
+ err424_set = dav_new_error(p, HTTP_FAILED_DEPENDENCY, 0, 0,
+ "Attempted DAV:set operation "
+ "could not be completed due "
+ "to other errors.");
+ ctx->err = err424_set;
+ }
+ else if (ctx->operation == DAV_PROP_OP_DELETE) {
+ if (err424_delete == NULL)
+ err424_delete = dav_new_error(p, HTTP_FAILED_DEPENDENCY, 0, 0,
+ "Attempted DAV:remove "
+ "operation could not be "
+ "completed due to other "
+ "errors.");
+ ctx->err = err424_delete;
+ }
+ }
+
+ s = apr_psprintf(p,
+ "<D:status>"
+ "HTTP/1.1 %d (status)"
+ "</D:status>" DEBUG_CR,
+ ctx->err->status);
+ apr_text_append(p, &hdr, s);
+
+ /* ### we should use compute_desc if necessary... */
+ if (ctx->err->desc != NULL) {
+ apr_text_append(p, &hdr, "<D:responsedescription>" DEBUG_CR);
+ apr_text_append(p, &hdr, ctx->err->desc);
+ apr_text_append(p, &hdr, "</D:responsedescription>" DEBUG_CR);
+ }
+
+ apr_text_append(p, &hdr, "</D:propstat>" DEBUG_CR);
+ }
+
+ return hdr.first;
+}
+
+DAV_DECLARE(apr_text *) dav_success_proppatch(apr_pool_t *p,
+ apr_array_header_t *prop_ctx)
+{
+ apr_text_header hdr = { 0 };
+ int i = prop_ctx->nelts;
+ dav_prop_ctx *ctx = (dav_prop_ctx *)prop_ctx->elts;
+
+ /*
+ * ### we probably need to revise the way we assemble the response...
+ * ### this code assumes everything will return status==200.
+ */
+
+ apr_text_append(p, &hdr,
+ "<D:propstat>" DEBUG_CR
+ "<D:prop>" DEBUG_CR);
+
+ for ( ; i-- > 0; ++ctx ) {
+ apr_text_append(p, &hdr, apr_xml_empty_elem(p, ctx->prop));
+ }
+
+ apr_text_append(p, &hdr,
+ "</D:prop>" DEBUG_CR
+ "<D:status>HTTP/1.1 200 OK</D:status>" DEBUG_CR
+ "</D:propstat>" DEBUG_CR);
+
+ return hdr.first;
+}
+
+static void dav_prop_log_errors(dav_prop_ctx *ctx)
+{
+ dav_log_err(ctx->r, ctx->err, APLOG_ERR);
+}
+
+/*
+ * Call <func> for each context. This can stop when an error occurs, or
+ * simply iterate through the whole list.
+ *
+ * Returns 1 if an error occurs (and the iteration is aborted). Returns 0
+ * if all elements are processed.
+ *
+ * If <reverse> is true (non-zero), then the list is traversed in
+ * reverse order.
+ */
+static int dav_process_ctx_list(void (*func)(dav_prop_ctx *ctx),
+ apr_array_header_t *ctx_list, int stop_on_error,
+ int reverse)
+{
+ int i = ctx_list->nelts;
+ dav_prop_ctx *ctx = (dav_prop_ctx *)ctx_list->elts;
+
+ if (reverse)
+ ctx += i;
+
+ while (i--) {
+ if (reverse)
+ --ctx;
+
+ (*func)(ctx);
+ if (stop_on_error && DAV_PROP_CTX_HAS_ERR(*ctx)) {
+ return 1;
+ }
+
+ if (!reverse)
+ ++ctx;
+ }
+
+ return 0;
+}
+
+/* handle the PROPPATCH method */
+static int dav_method_proppatch(request_rec *r)
+{
+ dav_error *err;
+ dav_resource *resource;
+ int result;
+ apr_xml_doc *doc;
+ apr_xml_elem *child;
+ dav_propdb *propdb;
+ int failure = 0;
+ dav_response resp = { 0 };
+ apr_text *propstat_text;
+ apr_array_header_t *ctx_list;
+ dav_prop_ctx *ctx;
+ dav_auto_version_info av_info;
+
+ /* Ask repository module to resolve the resource */
+ err = dav_get_resource(r, 0 /* label_allowed */, 0 /* use_checked_in */,
+ &resource);
+ if (err != NULL)
+ return dav_handle_err(r, err, NULL);
+
+ if ((result = ap_xml_parse_input(r, &doc)) != OK) {
+ return result;
+ }
+ /* note: doc == NULL if no request body */
+
+ /* check for any method preconditions */
+ if (dav_run_method_precondition(r, resource, NULL, doc, &err) != DECLINED
+ && err) {
+ return dav_handle_err(r, err, NULL);
+ }
+
+ if (!resource->exists) {
+ /* Apache will supply a default error for this. */
+ return HTTP_NOT_FOUND;
+ }
+
+ if (doc == NULL || !dav_validate_root(doc, "propertyupdate")) {
+ /* This supplies additional information for the default message. */
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00587)
+ "The request body does not contain "
+ "a \"propertyupdate\" element.");
+ return HTTP_BAD_REQUEST;
+ }
+
+ /* Check If-Headers and existing locks */
+ /* Note: depth == 0. Implies no need for a multistatus response. */
+ if ((err = dav_validate_request(r, resource, 0, NULL, NULL,
+ DAV_VALIDATE_RESOURCE, NULL)) != NULL) {
+ /* ### add a higher-level description? */
+ return dav_handle_err(r, err, NULL);
+ }
+
+ /* make sure the resource can be modified (if versioning repository) */
+ if ((err = dav_auto_checkout(r, resource,
+ 0 /* not parent_only */,
+ &av_info)) != NULL) {
+ /* ### add a higher-level description? */
+ return dav_handle_err(r, err, NULL);
+ }
+
+ if ((err = dav_open_propdb(r, NULL, resource,
+ DAV_PROPDB_NONE, doc->namespaces,
+ &propdb)) != NULL) {
+ /* undo any auto-checkout */
+ dav_auto_checkin(r, resource, 1 /*undo*/, 0 /*unlock*/, &av_info);
+
+ err = dav_push_error(r->pool, HTTP_INTERNAL_SERVER_ERROR, 0,
+ apr_psprintf(r->pool,
+ "Could not open the property "
+ "database for %s.",
+ ap_escape_html(r->pool, r->uri)),
+ err);
+ return dav_handle_err(r, err, NULL);
+ }
+ /* ### what to do about closing the propdb on server failure? */
+
+ /* ### validate "live" properties */
+
+ /* set up an array to hold property operation contexts */
+ ctx_list = apr_array_make(r->pool, 10, sizeof(dav_prop_ctx));
+
+ /* do a first pass to ensure that all "remove" properties exist */
+ for (child = doc->root->first_child; child; child = child->next) {
+ int is_remove;
+ apr_xml_elem *prop_group;
+ apr_xml_elem *one_prop;
+
+ /* Ignore children that are not set/remove */
+ if (child->ns != APR_XML_NS_DAV_ID
+ || (!(is_remove = (strcmp(child->name, "remove") == 0))
+ && strcmp(child->name, "set") != 0)) {
+ continue;
+ }
+
+ /* make sure that a "prop" child exists for set/remove */
+ if ((prop_group = dav_find_child(child, "prop")) == NULL) {
+ dav_close_propdb(propdb);
+
+ /* undo any auto-checkout */
+ dav_auto_checkin(r, resource, 1 /*undo*/, 0 /*unlock*/, &av_info);
+
+ /* This supplies additional information for the default message. */
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00588)
+ "A \"prop\" element is missing inside "
+ "the propertyupdate command.");
+ return HTTP_BAD_REQUEST;
+ }
+
+ for (one_prop = prop_group->first_child; one_prop;
+ one_prop = one_prop->next) {
+
+ ctx = (dav_prop_ctx *)apr_array_push(ctx_list);
+ ctx->propdb = propdb;
+ ctx->operation = is_remove ? DAV_PROP_OP_DELETE : DAV_PROP_OP_SET;
+ ctx->prop = one_prop;
+
+ ctx->r = r; /* for later use by dav_prop_log_errors() */
+
+ dav_prop_validate(ctx);
+
+ if ( DAV_PROP_CTX_HAS_ERR(*ctx) ) {
+ failure = 1;
+ }
+ }
+ }
+
+ /* ### should test that we found at least one set/remove */
+
+ /* execute all of the operations */
+ if (!failure && dav_process_ctx_list(dav_prop_exec, ctx_list, 1, 0)) {
+ failure = 1;
+ }
+
+ /* generate a failure/success response */
+ if (failure) {
+ (void)dav_process_ctx_list(dav_prop_rollback, ctx_list, 0, 1);
+ propstat_text = dav_failed_proppatch(r->pool, ctx_list);
+ }
+ else {
+ (void)dav_process_ctx_list(dav_prop_commit, ctx_list, 0, 0);
+ propstat_text = dav_success_proppatch(r->pool, ctx_list);
+ }
+
+ /* make sure this gets closed! */
+ dav_close_propdb(propdb);
+
+ /* complete any auto-versioning */
+ dav_auto_checkin(r, resource, failure, 0 /*unlock*/, &av_info);
+
+ /* log any errors that occurred */
+ (void)dav_process_ctx_list(dav_prop_log_errors, ctx_list, 0, 0);
+
+ resp.href = resource->uri;
+
+ /* ### should probably use something new to pass along this text... */
+ resp.propresult.propstats = propstat_text;
+
+ dav_send_multistatus(r, HTTP_MULTI_STATUS, &resp, doc->namespaces);
+
+ /* the response has been sent. */
+ return DONE;
+}
+
+static int process_mkcol_body(request_rec *r)
+{
+ /* This is snarfed from ap_setup_client_block(). We could get pretty
+ * close to this behavior by passing REQUEST_NO_BODY, but we need to
+ * return HTTP_UNSUPPORTED_MEDIA_TYPE (while ap_setup_client_block
+ * returns HTTP_REQUEST_ENTITY_TOO_LARGE). */
+
+ const char *tenc = apr_table_get(r->headers_in, "Transfer-Encoding");
+ const char *lenp = apr_table_get(r->headers_in, "Content-Length");
+
+ /* make sure to set the Apache request fields properly. */
+ r->read_body = REQUEST_NO_BODY;
+ r->read_chunked = 0;
+ r->remaining = 0;
+
+ if (tenc) {
+ if (ap_cstr_casecmp(tenc, "chunked")) {
+ /* Use this instead of Apache's default error string */
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00589)
+ "Unknown Transfer-Encoding %s", tenc);
+ return HTTP_NOT_IMPLEMENTED;
+ }
+
+ r->read_chunked = 1;
+ }
+ else if (lenp) {
+ if (!ap_parse_strict_length(&r->remaining, lenp)) {
+ r->remaining = 0;
+ /* This supplies additional information for the default message. */
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00590)
+ "Invalid Content-Length %s", lenp);
+ return HTTP_BAD_REQUEST;
+ }
+ }
+
+ if (r->read_chunked || r->remaining > 0) {
+ /* ### log something? */
+
+ /* Apache will supply a default error for this. */
+ return HTTP_UNSUPPORTED_MEDIA_TYPE;
+ }
+
+ /*
+ * Get rid of the body. this will call ap_setup_client_block(), but
+ * our copy above has already verified its work.
+ */
+ return ap_discard_request_body(r);
+}
+
+/* handle the MKCOL method */
+static int dav_method_mkcol(request_rec *r)
+{
+ dav_resource *resource;
+ int resource_state;
+ dav_auto_version_info av_info;
+ const dav_hooks_locks *locks_hooks = DAV_GET_HOOKS_LOCKS(r);
+ dav_error *err;
+ dav_error *err2;
+ int result;
+ dav_response *multi_status;
+
+ /* handle the request body */
+ /* ### this may move lower once we start processing bodies */
+ if ((result = process_mkcol_body(r)) != OK) {
+ return result;
+ }
+
+ /* Ask repository module to resolve the resource */
+ err = dav_get_resource(r, 0 /* label_allowed */, 0 /* use_checked_in */,
+ &resource);
+ if (err != NULL)
+ return dav_handle_err(r, err, NULL);
+
+ /* check for any method preconditions */
+ if (dav_run_method_precondition(r, resource, NULL, NULL, &err) != DECLINED
+ && err) {
+ return dav_handle_err(r, err, NULL);
+ }
+
+ if (resource->exists) {
+ /* oops. something was already there! */
+
+ /* Apache will supply a default error for this. */
+ /* ### we should provide a specific error message! */
+ return HTTP_METHOD_NOT_ALLOWED;
+ }
+
+ resource_state = dav_get_resource_state(r, resource);
+
+ /*
+ * Check If-Headers and existing locks.
+ *
+ * Note: depth == 0 normally requires no multistatus response. However,
+ * if we pass DAV_VALIDATE_PARENT, then we could get an error on a URI
+ * other than the Request-URI, thereby requiring a multistatus.
+ *
+ * If the resource does not exist (DAV_RESOURCE_NULL), then we must
+ * check the resource *and* its parent. If the resource exists or is
+ * a locknull resource, then we check only the resource.
+ */
+ if ((err = dav_validate_request(r, resource, 0, NULL, &multi_status,
+ resource_state == DAV_RESOURCE_NULL ?
+ DAV_VALIDATE_PARENT :
+ DAV_VALIDATE_RESOURCE, NULL)) != NULL) {
+ /* ### add a higher-level description? */
+ return dav_handle_err(r, err, multi_status);
+ }
+
+ /* if versioned resource, make sure parent is checked out */
+ if ((err = dav_auto_checkout(r, resource, 1 /* parent_only */,
+ &av_info)) != NULL) {
+ /* ### add a higher-level description? */
+ return dav_handle_err(r, err, NULL);
+ }
+
+ /* try to create the collection */
+ resource->collection = 1;
+ err = (*resource->hooks->create_collection)(resource);
+
+ /* restore modifiability of parent back to what it was */
+ err2 = dav_auto_checkin(r, NULL, err != NULL /* undo if error */,
+ 0 /*unlock*/, &av_info);
+
+ /* check for errors now */
+ if (err != NULL) {
+ return dav_handle_err(r, err, NULL);
+ }
+ if (err2 != NULL) {
+ /* just log a warning */
+ err = dav_push_error(r->pool, err2->status, 0,
+ "The MKCOL was successful, but there "
+ "was a problem automatically checking in "
+ "the parent collection.",
+ err2);
+ dav_log_err(r, err, APLOG_WARNING);
+ }
+
+ if (locks_hooks != NULL) {
+ dav_lockdb *lockdb;
+
+ if ((err = (*locks_hooks->open_lockdb)(r, 0, 0, &lockdb)) != NULL) {
+ /* The directory creation was successful, but the locking failed. */
+ err = dav_push_error(r->pool, err->status, 0,
+ "The MKCOL was successful, but there "
+ "was a problem opening the lock database "
+ "which prevents inheriting locks from the "
+ "parent resources.",
+ err);
+ return dav_handle_err(r, err, NULL);
+ }
+
+ /* notify lock system that we have created/replaced a resource */
+ err = dav_notify_created(r, lockdb, resource, resource_state, 0);
+
+ (*locks_hooks->close_lockdb)(lockdb);
+
+ if (err != NULL) {
+ /* The dir creation was successful, but the locking failed. */
+ err = dav_push_error(r->pool, err->status, 0,
+ "The MKCOL was successful, but there "
+ "was a problem updating its lock "
+ "information.",
+ err);
+ return dav_handle_err(r, err, NULL);
+ }
+ }
+
+ /* return an appropriate response (HTTP_CREATED) */
+ return dav_created(r, NULL, "Collection", 0);
+}
+
+/* handle the COPY and MOVE methods */
+static int dav_method_copymove(request_rec *r, int is_move)
+{
+ dav_resource *resource;
+ dav_resource *resnew;
+ dav_auto_version_info src_av_info = { 0 };
+ dav_auto_version_info dst_av_info = { 0 };
+ const char *body;
+ const char *dest;
+ dav_error *err;
+ dav_error *err2;
+ dav_error *err3;
+ dav_response *multi_response;
+ dav_lookup_result lookup;
+ int is_dir;
+ int overwrite;
+ int depth;
+ int result;
+ dav_lockdb *lockdb;
+ int replace_dest;
+ int resnew_state;
+
+ /* Ask repository module to resolve the resource */
+ err = dav_get_resource(r, !is_move /* label_allowed */,
+ 0 /* use_checked_in */, &resource);
+ if (err != NULL)
+ return dav_handle_err(r, err, NULL);
+
+ /* check for any method preconditions */
+ if (dav_run_method_precondition(r, resource, NULL, NULL, &err) != DECLINED
+ && err) {
+ return dav_handle_err(r, err, NULL);
+ }
+
+ if (!resource->exists) {
+ /* Apache will supply a default error for this. */
+ return HTTP_NOT_FOUND;
+ }
+
+ /* If not a file or collection resource, COPY/MOVE not allowed */
+ /* ### allow COPY/MOVE of DeltaV resource types */
+ if (resource->type != DAV_RESOURCE_TYPE_REGULAR) {
+ body = apr_psprintf(r->pool,
+ "Cannot COPY/MOVE resource %s.",
+ ap_escape_html(r->pool, r->uri));
+ return dav_error_response(r, HTTP_METHOD_NOT_ALLOWED, body);
+ }
+
+ /* get the destination URI */
+ dest = apr_table_get(r->headers_in, "Destination");
+ if (dest == NULL) {
+ /* Look in headers provided by Netscape's Roaming Profiles */
+ const char *nscp_host = apr_table_get(r->headers_in, "Host");
+ const char *nscp_path = apr_table_get(r->headers_in, "New-uri");
+
+ if (nscp_host != NULL && nscp_path != NULL)
+ dest = apr_pstrcat(r->pool, "http://", nscp_host, nscp_path, NULL);
+ }
+ if (dest == NULL) {
+ /* This supplies additional information for the default message. */
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00591)
+ "The request is missing a Destination header.");
+ return HTTP_BAD_REQUEST;
+ }
+
+ lookup = dav_lookup_uri(dest, r, 1 /* must_be_absolute */);
+ if (lookup.rnew == NULL) {
+ if (lookup.err.status == HTTP_BAD_REQUEST) {
+ /* This supplies additional information for the default message. */
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00592)
+ "%s", lookup.err.desc);
+ return HTTP_BAD_REQUEST;
+ }
+
+ /* ### this assumes that dav_lookup_uri() only generates a status
+ * ### that Apache can provide a status line for!! */
+
+ return dav_error_response(r, lookup.err.status, lookup.err.desc);
+ }
+ if (lookup.rnew->status != HTTP_OK) {
+ const char *auth = apr_table_get(lookup.rnew->err_headers_out,
+ "WWW-Authenticate");
+ if (lookup.rnew->status == HTTP_UNAUTHORIZED && auth != NULL) {
+ /* propagate the WWW-Authorization header up from the
+ * subreq so the client sees it. */
+ apr_table_setn(r->err_headers_out, "WWW-Authenticate",
+ apr_pstrdup(r->pool, auth));
+ }
+
+ /* ### how best to report this... */
+ return dav_error_response(r, lookup.rnew->status,
+ "Destination URI had an error.");
+ }
+
+ /* Resolve destination resource */
+ err = dav_get_resource(lookup.rnew, 0 /* label_allowed */,
+ 0 /* use_checked_in */, &resnew);
+ if (err != NULL)
+ return dav_handle_err(r, err, NULL);
+
+ /* check for any method preconditions */
+ if (dav_run_method_precondition(r, resource, resnew, NULL, &err) != DECLINED
+ && err) {
+ return dav_handle_err(r, err, NULL);
+ }
+
+ /* are the two resources handled by the same repository? */
+ if (resource->hooks != resnew->hooks) {
+ /* ### this message exposes some backend config, but screw it... */
+ return dav_error_response(r, HTTP_BAD_GATEWAY,
+ "Destination URI is handled by a "
+ "different repository than the source URI. "
+ "MOVE or COPY between repositories is "
+ "not possible.");
+ }
+
+ /* get and parse the overwrite header value */
+ if ((overwrite = dav_get_overwrite(r)) < 0) {
+ /* dav_get_overwrite() supplies additional information for the
+ * default message. */
+ return HTTP_BAD_REQUEST;
+ }
+
+ /* quick failure test: if dest exists and overwrite is false. */
+ if (resnew->exists && !overwrite) {
+ /* Supply some text for the error response body. */
+ return dav_error_response(r, HTTP_PRECONDITION_FAILED,
+ "Destination is not empty and "
+ "Overwrite is not \"T\"");
+ }
+
+ /* are the source and destination the same? */
+ if ((*resource->hooks->is_same_resource)(resource, resnew)) {
+ /* Supply some text for the error response body. */
+ return dav_error_response(r, HTTP_FORBIDDEN,
+ "Source and Destination URIs are the same.");
+
+ }
+
+ is_dir = resource->collection;
+
+ /* get and parse the Depth header value. "0" and "infinity" are legal. */
+ if ((depth = dav_get_depth(r, DAV_INFINITY)) < 0) {
+ /* dav_get_depth() supplies additional information for the
+ * default message. */
+ return HTTP_BAD_REQUEST;
+ }
+ if (depth == 1) {
+ /* This supplies additional information for the default message. */
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00593)
+ "Depth must be \"0\" or \"infinity\" for COPY or MOVE.");
+ return HTTP_BAD_REQUEST;
+ }
+ if (is_move && is_dir && depth != DAV_INFINITY) {
+ /* This supplies additional information for the default message. */
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00594)
+ "Depth must be \"infinity\" when moving a collection.");
+ return HTTP_BAD_REQUEST;
+ }
+
+ /*
+ * Check If-Headers and existing locks for each resource in the source.
+ * We will return a 424 response with a DAV:multistatus body.
+ * The multistatus responses will contain the information about any
+ * resource that fails the validation.
+ *
+ * We check the parent resource, too, if this is a MOVE. Moving the
+ * resource effectively removes it from the parent collection, so we
+ * must ensure that we have met the appropriate conditions.
+ *
+ * If a problem occurs with the Request-URI itself, then a plain error
+ * (rather than a multistatus) will be returned.
+ */
+ if ((err = dav_validate_request(r, resource, depth, NULL,
+ &multi_response,
+ (is_move ? DAV_VALIDATE_PARENT
+ : DAV_VALIDATE_RESOURCE
+ | DAV_VALIDATE_NO_MODIFY)
+ | DAV_VALIDATE_USE_424,
+ NULL)) != NULL) {
+ err = dav_push_error(r->pool, err->status, 0,
+ apr_psprintf(r->pool,
+ "Could not %s %s due to a failed "
+ "precondition on the source "
+ "(e.g. locks).",
+ is_move ? "MOVE" : "COPY",
+ ap_escape_html(r->pool, r->uri)),
+ err);
+ return dav_handle_err(r, err, multi_response);
+ }
+
+ /*
+ * Check If-Headers and existing locks for destination. Note that we
+ * use depth==infinity since the target (hierarchy) will be deleted
+ * before the move/copy is completed.
+ *
+ * Note that we are overwriting the target, which implies a DELETE, so
+ * we are subject to the error/response rules as a DELETE. Namely, we
+ * will return a 424 error if any of the validations fail.
+ * (see dav_method_delete() for more information)
+ */
+ if ((err = dav_validate_request(lookup.rnew, resnew, DAV_INFINITY, NULL,
+ &multi_response,
+ DAV_VALIDATE_PARENT
+ | DAV_VALIDATE_USE_424, NULL)) != NULL) {
+ err = dav_push_error(r->pool, err->status, 0,
+ apr_psprintf(r->pool,
+ "Could not MOVE/COPY %s due to a "
+ "failed precondition on the "
+ "destination (e.g. locks).",
+ ap_escape_html(r->pool, r->uri)),
+ err);
+ return dav_handle_err(r, err, multi_response);
+ }
+
+ if (is_dir
+ && depth == DAV_INFINITY
+ && (*resource->hooks->is_parent_resource)(resource, resnew)) {
+ /* Supply some text for the error response body. */
+ return dav_error_response(r, HTTP_FORBIDDEN,
+ "Source collection contains the "
+ "Destination.");
+
+ }
+ if (is_dir
+ && (*resnew->hooks->is_parent_resource)(resnew, resource)) {
+ /* The destination must exist (since it contains the source), and
+ * a condition above implies Overwrite==T. Obviously, we cannot
+ * delete the Destination before the MOVE/COPY, as that would
+ * delete the Source.
+ */
+
+ /* Supply some text for the error response body. */
+ return dav_error_response(r, HTTP_FORBIDDEN,
+ "Destination collection contains the Source "
+ "and Overwrite has been specified.");
+ }
+
+ /* ### for now, we don't need anything in the body */
+ if ((result = ap_discard_request_body(r)) != OK) {
+ return result;
+ }
+
+ if ((err = dav_open_lockdb(r, 0, &lockdb)) != NULL) {
+ /* ### add a higher-level description? */
+ return dav_handle_err(r, err, NULL);
+ }
+
+ /* remove any locks from the old resources */
+ /*
+ * ### this is Yet Another Traversal. if we do a rename(), then we
+ * ### really don't have to do this in some cases since the inode
+ * ### values will remain constant across the move. but we can't
+ * ### know that fact from outside the provider :-(
+ *
+ * ### note that we now have a problem atomicity in the move/copy
+ * ### since a failure after this would have removed locks (technically,
+ * ### this is okay to do, but really...)
+ */
+ if (is_move && lockdb != NULL) {
+ /* ### this is wrong! it blasts direct locks on parent resources */
+ /* ### pass lockdb! */
+ (void)dav_unlock(r, resource, NULL);
+ }
+
+ /* if this is a move, then the source parent collection will be modified */
+ if (is_move) {
+ if ((err = dav_auto_checkout(r, resource, 1 /* parent_only */,
+ &src_av_info)) != NULL) {
+ if (lockdb != NULL)
+ (*lockdb->hooks->close_lockdb)(lockdb);
+
+ /* ### add a higher-level description? */
+ return dav_handle_err(r, err, NULL);
+ }
+ }
+
+ /*
+ * Remember the initial state of the destination, so the lock system
+ * can be notified as to how it changed.
+ */
+ resnew_state = dav_get_resource_state(lookup.rnew, resnew);
+
+ /* In a MOVE operation, the destination is replaced by the source.
+ * In a COPY operation, if the destination exists, is under version
+ * control, and is the same resource type as the source,
+ * then it should not be replaced, but modified to be a copy of
+ * the source.
+ */
+ if (!resnew->exists)
+ replace_dest = 0;
+ else if (is_move || !resource->versioned)
+ replace_dest = 1;
+ else if (resource->type != resnew->type)
+ replace_dest = 1;
+ else if ((resource->collection == 0) != (resnew->collection == 0))
+ replace_dest = 1;
+ else
+ replace_dest = 0;
+
+ /* If the destination must be created or replaced,
+ * make sure the parent collection is writable
+ */
+ if (!resnew->exists || replace_dest) {
+ if ((err = dav_auto_checkout(r, resnew, 1 /*parent_only*/,
+ &dst_av_info)) != NULL) {
+ /* could not make destination writable:
+ * if move, restore state of source parent
+ */
+ if (is_move) {
+ (void)dav_auto_checkin(r, NULL, 1 /* undo */,
+ 0 /*unlock*/, &src_av_info);
+ }
+
+ if (lockdb != NULL)
+ (*lockdb->hooks->close_lockdb)(lockdb);
+
+ /* ### add a higher-level description? */
+ return dav_handle_err(r, err, NULL);
+ }
+ }
+
+ /* If source and destination parents are the same, then
+ * use the same resource object, so status updates to one are reflected
+ * in the other, when doing auto-versioning. Otherwise,
+ * we may try to checkin the parent twice.
+ */
+ if (src_av_info.parent_resource != NULL
+ && dst_av_info.parent_resource != NULL
+ && (*src_av_info.parent_resource->hooks->is_same_resource)
+ (src_av_info.parent_resource, dst_av_info.parent_resource)) {
+
+ dst_av_info.parent_resource = src_av_info.parent_resource;
+ }
+
+ /* If destination is being replaced, remove it first
+ * (we know Ovewrite must be TRUE). Then try to copy/move the resource.
+ */
+ if (replace_dest)
+ err = (*resnew->hooks->remove_resource)(resnew, &multi_response);
+
+ if (err == NULL) {
+ if (is_move)
+ err = (*resource->hooks->move_resource)(resource, resnew,
+ &multi_response);
+ else
+ err = (*resource->hooks->copy_resource)(resource, resnew, depth,
+ &multi_response);
+ }
+
+ /* perform any auto-versioning cleanup */
+ err2 = dav_auto_checkin(r, NULL, err != NULL /* undo if error */,
+ 0 /*unlock*/, &dst_av_info);
+
+ if (is_move) {
+ err3 = dav_auto_checkin(r, NULL, err != NULL /* undo if error */,
+ 0 /*unlock*/, &src_av_info);
+ }
+ else
+ err3 = NULL;
+
+ /* check for error from remove/copy/move operations */
+ if (err != NULL) {
+ if (lockdb != NULL)
+ (*lockdb->hooks->close_lockdb)(lockdb);
+
+ err = dav_push_error(r->pool, err->status, 0,
+ apr_psprintf(r->pool,
+ "Could not MOVE/COPY %s.",
+ ap_escape_html(r->pool, r->uri)),
+ err);
+ return dav_handle_err(r, err, multi_response);
+ }
+
+ /* check for errors from auto-versioning */
+ if (err2 != NULL) {
+ /* just log a warning */
+ err = dav_push_error(r->pool, err2->status, 0,
+ "The MOVE/COPY was successful, but there was a "
+ "problem automatically checking in the "
+ "source parent collection.",
+ err2);
+ dav_log_err(r, err, APLOG_WARNING);
+ }
+ if (err3 != NULL) {
+ /* just log a warning */
+ err = dav_push_error(r->pool, err3->status, 0,
+ "The MOVE/COPY was successful, but there was a "
+ "problem automatically checking in the "
+ "destination or its parent collection.",
+ err3);
+ dav_log_err(r, err, APLOG_WARNING);
+ }
+
+ /* propagate any indirect locks at the target */
+ if (lockdb != NULL) {
+
+ /* notify lock system that we have created/replaced a resource */
+ err = dav_notify_created(r, lockdb, resnew, resnew_state, depth);
+
+ (*lockdb->hooks->close_lockdb)(lockdb);
+
+ if (err != NULL) {
+ /* The move/copy was successful, but the locking failed. */
+ err = dav_push_error(r->pool, err->status, 0,
+ "The MOVE/COPY was successful, but there "
+ "was a problem updating the lock "
+ "information.",
+ err);
+ return dav_handle_err(r, err, NULL);
+ }
+ }
+
+ /* return an appropriate response (HTTP_CREATED or HTTP_NO_CONTENT) */
+ return dav_created(r, lookup.rnew->unparsed_uri, "Destination",
+ resnew_state == DAV_RESOURCE_EXISTS);
+}
+
+/* dav_method_lock: Handler to implement the DAV LOCK method
+ * Returns appropriate HTTP_* response.
+ */
+static int dav_method_lock(request_rec *r)
+{
+ dav_error *err;
+ dav_resource *resource;
+ dav_resource *parent;
+ const dav_hooks_locks *locks_hooks;
+ int result;
+ int depth;
+ int new_lock_request = 0;
+ apr_xml_doc *doc;
+ dav_lock *lock;
+ dav_response *multi_response = NULL;
+ dav_lockdb *lockdb;
+ int resource_state;
+
+ /* If no locks provider, decline the request */
+ locks_hooks = DAV_GET_HOOKS_LOCKS(r);
+ if (locks_hooks == NULL)
+ return DECLINED;
+
+ if ((result = ap_xml_parse_input(r, &doc)) != OK)
+ return result;
+
+ depth = dav_get_depth(r, DAV_INFINITY);
+ if (depth != 0 && depth != DAV_INFINITY) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00595)
+ "Depth must be 0 or \"infinity\" for LOCK.");
+ return HTTP_BAD_REQUEST;
+ }
+
+ /* Ask repository module to resolve the resource */
+ err = dav_get_resource(r, 0 /* label_allowed */, 0 /* use_checked_in */,
+ &resource);
+ if (err != NULL)
+ return dav_handle_err(r, err, NULL);
+
+ /* check for any method preconditions */
+ if (dav_run_method_precondition(r, resource, NULL, doc, &err) != DECLINED
+ && err) {
+ return dav_handle_err(r, err, NULL);
+ }
+
+ /* Check if parent collection exists */
+ if ((err = resource->hooks->get_parent_resource(resource, &parent)) != NULL) {
+ /* ### add a higher-level description? */
+ return dav_handle_err(r, err, NULL);
+ }
+ if (parent && (!parent->exists || parent->collection != 1)) {
+ err = dav_new_error(r->pool, HTTP_CONFLICT, 0, 0,
+ apr_psprintf(r->pool,
+ "The parent resource of %s does not "
+ "exist or is not a collection.",
+ ap_escape_html(r->pool, r->uri)));
+ return dav_handle_err(r, err, NULL);
+ }
+
+ /*
+ * Open writable. Unless an error occurs, we'll be
+ * writing into the database.
+ */
+ if ((err = (*locks_hooks->open_lockdb)(r, 0, 0, &lockdb)) != NULL) {
+ /* ### add a higher-level description? */
+ return dav_handle_err(r, err, NULL);
+ }
+
+ if (doc != NULL) {
+ if ((err = dav_lock_parse_lockinfo(r, resource, lockdb, doc,
+ &lock)) != NULL) {
+ /* ### add a higher-level description to err? */
+ goto error;
+ }
+ new_lock_request = 1;
+
+ lock->auth_user = apr_pstrdup(r->pool, r->user);
+ }
+
+ resource_state = dav_get_resource_state(r, resource);
+
+ /*
+ * Check If-Headers and existing locks.
+ *
+ * If this will create a locknull resource, then the LOCK will affect
+ * the parent collection (much like a PUT/MKCOL). For that case, we must
+ * validate the parent resource's conditions.
+ */
+ if ((err = dav_validate_request(r, resource, depth, NULL, &multi_response,
+ (resource_state == DAV_RESOURCE_NULL
+ ? DAV_VALIDATE_PARENT
+ : DAV_VALIDATE_RESOURCE)
+ | (new_lock_request ? lock->scope : 0)
+ | DAV_VALIDATE_ADD_LD,
+ lockdb)) != OK) {
+ err = dav_push_error(r->pool, err->status, 0,
+ apr_psprintf(r->pool,
+ "Could not LOCK %s due to a failed "
+ "precondition (e.g. other locks).",
+ ap_escape_html(r->pool, r->uri)),
+ err);
+ goto error;
+ }
+
+ if (new_lock_request == 0) {
+ dav_locktoken_list *ltl;
+
+ /*
+ * Refresh request
+ * ### Assumption: We can renew multiple locks on the same resource
+ * ### at once. First harvest all the positive lock-tokens given in
+ * ### the If header. Then modify the lock entries for this resource
+ * ### with the new Timeout val.
+ */
+
+ if ((err = dav_get_locktoken_list(r, &ltl)) != NULL) {
+ err = dav_push_error(r->pool, err->status, 0,
+ apr_psprintf(r->pool,
+ "The lock refresh for %s failed "
+ "because no lock tokens were "
+ "specified in an \"If:\" "
+ "header.",
+ ap_escape_html(r->pool, r->uri)),
+ err);
+ goto error;
+ }
+
+ if ((err = (*locks_hooks->refresh_locks)(lockdb, resource, ltl,
+ dav_get_timeout(r),
+ &lock)) != NULL) {
+ /* ### add a higher-level description to err? */
+ goto error;
+ }
+ } else {
+ /* New lock request */
+ char *locktoken_txt;
+ dav_dir_conf *conf;
+
+ conf = (dav_dir_conf *)ap_get_module_config(r->per_dir_config,
+ &dav_module);
+
+ /* apply lower bound (if any) from DAVMinTimeout directive */
+ if (lock->timeout != DAV_TIMEOUT_INFINITE
+ && lock->timeout < time(NULL) + conf->locktimeout)
+ lock->timeout = time(NULL) + conf->locktimeout;
+
+ err = dav_add_lock(r, resource, lockdb, lock, &multi_response);
+ if (err != NULL) {
+ /* ### add a higher-level description to err? */
+ goto error;
+ }
+
+ locktoken_txt = apr_pstrcat(r->pool, "<",
+ (*locks_hooks->format_locktoken)(r->pool,
+ lock->locktoken),
+ ">", NULL);
+
+ apr_table_setn(r->headers_out, "Lock-Token", locktoken_txt);
+ }
+
+ (*locks_hooks->close_lockdb)(lockdb);
+
+ r->status = HTTP_OK;
+ ap_set_content_type(r, DAV_XML_CONTENT_TYPE);
+
+ ap_rputs(DAV_XML_HEADER DEBUG_CR "<D:prop xmlns:D=\"DAV:\">" DEBUG_CR, r);
+ if (lock == NULL)
+ ap_rputs("<D:lockdiscovery/>" DEBUG_CR, r);
+ else {
+ ap_rprintf(r,
+ "<D:lockdiscovery>" DEBUG_CR
+ "%s" DEBUG_CR
+ "</D:lockdiscovery>" DEBUG_CR,
+ dav_lock_get_activelock(r, lock, NULL));
+ }
+ ap_rputs("</D:prop>", r);
+
+ /* the response has been sent. */
+ return DONE;
+
+ error:
+ (*locks_hooks->close_lockdb)(lockdb);
+ return dav_handle_err(r, err, multi_response);
+}
+
+/* dav_method_unlock: Handler to implement the DAV UNLOCK method
+ * Returns appropriate HTTP_* response.
+ */
+static int dav_method_unlock(request_rec *r)
+{
+ dav_error *err;
+ dav_resource *resource;
+ const dav_hooks_locks *locks_hooks;
+ int result;
+ const char *const_locktoken_txt;
+ char *locktoken_txt;
+ dav_locktoken *locktoken = NULL;
+ int resource_state;
+ dav_response *multi_response;
+
+ /* If no locks provider, decline the request */
+ locks_hooks = DAV_GET_HOOKS_LOCKS(r);
+ if (locks_hooks == NULL)
+ return DECLINED;
+
+ if ((const_locktoken_txt = apr_table_get(r->headers_in,
+ "Lock-Token")) == NULL) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00596)
+ "Unlock failed (%s): "
+ "No Lock-Token specified in header", r->filename);
+ return HTTP_BAD_REQUEST;
+ }
+
+ locktoken_txt = apr_pstrdup(r->pool, const_locktoken_txt);
+ if (locktoken_txt[0] != '<') {
+ /* ### should provide more specifics... */
+ return HTTP_BAD_REQUEST;
+ }
+ locktoken_txt++;
+
+ if (locktoken_txt[strlen(locktoken_txt) - 1] != '>') {
+ /* ### should provide more specifics... */
+ return HTTP_BAD_REQUEST;
+ }
+ locktoken_txt[strlen(locktoken_txt) - 1] = '\0';
+
+ if ((err = (*locks_hooks->parse_locktoken)(r->pool, locktoken_txt,
+ &locktoken)) != NULL) {
+ err = dav_push_error(r->pool, HTTP_BAD_REQUEST, 0,
+ apr_psprintf(r->pool,
+ "The UNLOCK on %s failed -- an "
+ "invalid lock token was specified "
+ "in the \"If:\" header.",
+ ap_escape_html(r->pool, r->uri)),
+ err);
+ return dav_handle_err(r, err, NULL);
+ }
+
+ /* Ask repository module to resolve the resource */
+ err = dav_get_resource(r, 0 /* label_allowed */, 0 /* use_checked_in */,
+ &resource);
+ if (err != NULL)
+ return dav_handle_err(r, err, NULL);
+
+ /* check for any method preconditions */
+ if (dav_run_method_precondition(r, resource, NULL, NULL, &err) != DECLINED
+ && err) {
+ return dav_handle_err(r, err, NULL);
+ }
+
+ resource_state = dav_get_resource_state(r, resource);
+
+ /*
+ * Check If-Headers and existing locks.
+ *
+ * Note: depth == 0 normally requires no multistatus response. However,
+ * if we pass DAV_VALIDATE_PARENT, then we could get an error on a URI
+ * other than the Request-URI, thereby requiring a multistatus.
+ *
+ * If the resource is a locknull resource, then the UNLOCK will affect
+ * the parent collection (much like a delete). For that case, we must
+ * validate the parent resource's conditions.
+ */
+ if ((err = dav_validate_request(r, resource, 0, locktoken,
+ &multi_response,
+ resource_state == DAV_RESOURCE_LOCK_NULL
+ ? DAV_VALIDATE_PARENT
+ : DAV_VALIDATE_RESOURCE, NULL)) != NULL) {
+ /* ### add a higher-level description? */
+ return dav_handle_err(r, err, multi_response);
+ }
+
+ /* ### RFC 2518 s. 8.11: If this resource is locked by locktoken,
+ * _all_ resources locked by locktoken are released. It does not say
+ * resource has to be the root of an infinite lock. Thus, an UNLOCK
+ * on any part of an infinite lock will remove the lock on all resources.
+ *
+ * For us, if r->filename represents an indirect lock (part of an infinity lock),
+ * we must actually perform an UNLOCK on the direct lock for this resource.
+ */
+ if ((result = dav_unlock(r, resource, locktoken)) != OK) {
+ return result;
+ }
+
+ return HTTP_NO_CONTENT;
+}
+
+static int dav_method_vsn_control(request_rec *r)
+{
+ dav_resource *resource;
+ int resource_state;
+ dav_auto_version_info av_info;
+ const dav_hooks_locks *locks_hooks = DAV_GET_HOOKS_LOCKS(r);
+ const dav_hooks_vsn *vsn_hooks = DAV_GET_HOOKS_VSN(r);
+ dav_error *err;
+ apr_xml_doc *doc;
+ const char *target = NULL;
+ int result;
+
+ /* if no versioning provider, decline the request */
+ if (vsn_hooks == NULL)
+ return DECLINED;
+
+ /* ask repository module to resolve the resource */
+ err = dav_get_resource(r, 0 /* label_allowed */, 0 /* use_checked_in */,
+ &resource);
+ if (err != NULL)
+ return dav_handle_err(r, err, NULL);
+
+ /* parse the request body (may be a version-control element) */
+ if ((result = ap_xml_parse_input(r, &doc)) != OK) {
+ return result;
+ }
+ /* note: doc == NULL if no request body */
+
+ /* check for any method preconditions */
+ if (dav_run_method_precondition(r, resource, NULL, doc, &err) != DECLINED
+ && err) {
+ return dav_handle_err(r, err, NULL);
+ }
+
+ /* remember the pre-creation resource state */
+ resource_state = dav_get_resource_state(r, resource);
+
+ if (doc != NULL) {
+ const apr_xml_elem *child;
+ apr_size_t tsize;
+
+ if (!dav_validate_root(doc, "version-control")) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00597)
+ "The request body does not contain "
+ "a \"version-control\" element.");
+ return HTTP_BAD_REQUEST;
+ }
+
+ /* get the version URI */
+ if ((child = dav_find_child(doc->root, "version")) == NULL) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00598)
+ "The \"version-control\" element does not contain "
+ "a \"version\" element.");
+ return HTTP_BAD_REQUEST;
+ }
+
+ if ((child = dav_find_child(child, "href")) == NULL) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00599)
+ "The \"version\" element does not contain "
+ "an \"href\" element.");
+ return HTTP_BAD_REQUEST;
+ }
+
+ /* get version URI */
+ apr_xml_to_text(r->pool, child, APR_XML_X2T_INNER, NULL, NULL,
+ &target, &tsize);
+ if (tsize == 0) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00600)
+ "An \"href\" element does not contain a URI.");
+ return HTTP_BAD_REQUEST;
+ }
+ }
+
+ /* Check request preconditions */
+
+ /* ### need a general mechanism for reporting precondition violations
+ * ### (should be returning XML document for 403/409 responses)
+ */
+
+ /* if not versioning existing resource, must specify version to select */
+ if (!resource->exists && target == NULL) {
+ err = dav_new_error(r->pool, HTTP_CONFLICT, 0, 0,
+ "<DAV:initial-version-required/>");
+ return dav_handle_err(r, err, NULL);
+ }
+ else if (resource->exists) {
+ /* cannot add resource to existing version history */
+ if (target != NULL) {
+ err = dav_new_error(r->pool, HTTP_CONFLICT, 0, 0,
+ "<DAV:cannot-add-to-existing-history/>");
+ return dav_handle_err(r, err, NULL);
+ }
+
+ /* resource must be unversioned and versionable, or version selector */
+ if (resource->type != DAV_RESOURCE_TYPE_REGULAR
+ || (!resource->versioned && !(vsn_hooks->versionable)(resource))) {
+ err = dav_new_error(r->pool, HTTP_CONFLICT, 0, 0,
+ "<DAV:must-be-versionable/>");
+ return dav_handle_err(r, err, NULL);
+ }
+
+ /* the DeltaV spec says if resource is a version selector,
+ * then VERSION-CONTROL is a no-op
+ */
+ if (resource->versioned) {
+ /* set the Cache-Control header, per the spec */
+ apr_table_setn(r->headers_out, "Cache-Control", "no-cache");
+
+ /* no body */
+ ap_set_content_length(r, 0);
+
+ return DONE;
+ }
+ }
+
+ /* Check If-Headers and existing locks */
+ /* Note: depth == 0. Implies no need for a multistatus response. */
+ if ((err = dav_validate_request(r, resource, 0, NULL, NULL,
+ resource_state == DAV_RESOURCE_NULL ?
+ DAV_VALIDATE_PARENT :
+ DAV_VALIDATE_RESOURCE, NULL)) != NULL) {
+ return dav_handle_err(r, err, NULL);
+ }
+
+ /* if in versioned collection, make sure parent is checked out */
+ if ((err = dav_auto_checkout(r, resource, 1 /* parent_only */,
+ &av_info)) != NULL) {
+ return dav_handle_err(r, err, NULL);
+ }
+
+ /* attempt to version-control the resource */
+ if ((err = (*vsn_hooks->vsn_control)(resource, target)) != NULL) {
+ dav_auto_checkin(r, resource, 1 /*undo*/, 0 /*unlock*/, &av_info);
+ err = dav_push_error(r->pool, HTTP_CONFLICT, 0,
+ apr_psprintf(r->pool,
+ "Could not VERSION-CONTROL resource %s.",
+ ap_escape_html(r->pool, r->uri)),
+ err);
+ return dav_handle_err(r, err, NULL);
+ }
+
+ /* revert writability of parent directory */
+ err = dav_auto_checkin(r, resource, 0 /*undo*/, 0 /*unlock*/, &av_info);
+ if (err != NULL) {
+ /* just log a warning */
+ err = dav_push_error(r->pool, err->status, 0,
+ "The VERSION-CONTROL was successful, but there "
+ "was a problem automatically checking in "
+ "the parent collection.",
+ err);
+ dav_log_err(r, err, APLOG_WARNING);
+ }
+
+ /* if the resource is lockable, let lock system know of new resource */
+ if (locks_hooks != NULL
+ && (*locks_hooks->get_supportedlock)(resource) != NULL) {
+ dav_lockdb *lockdb;
+
+ if ((err = (*locks_hooks->open_lockdb)(r, 0, 0, &lockdb)) != NULL) {
+ /* The resource creation was successful, but the locking failed. */
+ err = dav_push_error(r->pool, err->status, 0,
+ "The VERSION-CONTROL was successful, but there "
+ "was a problem opening the lock database "
+ "which prevents inheriting locks from the "
+ "parent resources.",
+ err);
+ return dav_handle_err(r, err, NULL);
+ }
+
+ /* notify lock system that we have created/replaced a resource */
+ err = dav_notify_created(r, lockdb, resource, resource_state, 0);
+
+ (*locks_hooks->close_lockdb)(lockdb);
+
+ if (err != NULL) {
+ /* The dir creation was successful, but the locking failed. */
+ err = dav_push_error(r->pool, err->status, 0,
+ "The VERSION-CONTROL was successful, but there "
+ "was a problem updating its lock "
+ "information.",
+ err);
+ return dav_handle_err(r, err, NULL);
+ }
+ }
+
+ /* set the Cache-Control header, per the spec */
+ apr_table_setn(r->headers_out, "Cache-Control", "no-cache");
+
+ /* return an appropriate response (HTTP_CREATED) */
+ return dav_created(r, resource->uri, "Version selector", 0 /*replaced*/);
+}
+
+/* handle the CHECKOUT method */
+static int dav_method_checkout(request_rec *r)
+{
+ dav_resource *resource;
+ dav_resource *working_resource;
+ const dav_hooks_vsn *vsn_hooks = DAV_GET_HOOKS_VSN(r);
+ dav_error *err;
+ int result;
+ apr_xml_doc *doc;
+ int apply_to_vsn = 0;
+ int is_unreserved = 0;
+ int is_fork_ok = 0;
+ int create_activity = 0;
+ apr_array_header_t *activities = NULL;
+
+ /* If no versioning provider, decline the request */
+ if (vsn_hooks == NULL)
+ return DECLINED;
+
+ if ((result = ap_xml_parse_input(r, &doc)) != OK)
+ return result;
+
+ if (doc != NULL) {
+ const apr_xml_elem *aset;
+
+ if (!dav_validate_root(doc, "checkout")) {
+ /* This supplies additional information for the default msg. */
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00601)
+ "The request body, if present, must be a "
+ "DAV:checkout element.");
+ return HTTP_BAD_REQUEST;
+ }
+
+ if (dav_find_child(doc->root, "apply-to-version") != NULL) {
+ if (apr_table_get(r->headers_in, "label") != NULL) {
+ /* ### we want generic 403/409 XML reporting here */
+ /* ### DAV:must-not-have-label-and-apply-to-version */
+ return dav_error_response(r, HTTP_CONFLICT,
+ "DAV:apply-to-version cannot be "
+ "used in conjunction with a "
+ "Label header.");
+ }
+ apply_to_vsn = 1;
+ }
+
+ is_unreserved = dav_find_child(doc->root, "unreserved") != NULL;
+ is_fork_ok = dav_find_child(doc->root, "fork-ok") != NULL;
+
+ if ((aset = dav_find_child(doc->root, "activity-set")) != NULL) {
+ if (dav_find_child(aset, "new") != NULL) {
+ create_activity = 1;
+ }
+ else {
+ const apr_xml_elem *child = aset->first_child;
+
+ activities = apr_array_make(r->pool, 1, sizeof(const char *));
+
+ for (; child != NULL; child = child->next) {
+ if (child->ns == APR_XML_NS_DAV_ID
+ && strcmp(child->name, "href") == 0) {
+ const char *href;
+
+ href = dav_xml_get_cdata(child, r->pool,
+ 1 /* strip_white */);
+ *(const char **)apr_array_push(activities) = href;
+ }
+ }
+
+ if (activities->nelts == 0) {
+ /* no href's is a DTD violation:
+ <!ELEMENT activity-set (href+ | new)>
+ */
+
+ /* This supplies additional info for the default msg. */
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00602)
+ "Within the DAV:activity-set element, the "
+ "DAV:new element must be used, or at least "
+ "one DAV:href must be specified.");
+ return HTTP_BAD_REQUEST;
+ }
+ }
+ }
+ }
+
+ /* Ask repository module to resolve the resource */
+ err = dav_get_resource(r, 1 /*label_allowed*/, apply_to_vsn, &resource);
+ if (err != NULL)
+ return dav_handle_err(r, err, NULL);
+
+ /* check for any method preconditions */
+ if (dav_run_method_precondition(r, resource, NULL, doc, &err) != DECLINED
+ && err) {
+ return dav_handle_err(r, err, NULL);
+ }
+
+ if (!resource->exists) {
+ /* Apache will supply a default error for this. */
+ return HTTP_NOT_FOUND;
+ }
+
+ /* Check the state of the resource: must be a file or collection,
+ * must be versioned, and must not already be checked out.
+ */
+ if (resource->type != DAV_RESOURCE_TYPE_REGULAR
+ && resource->type != DAV_RESOURCE_TYPE_VERSION) {
+ return dav_error_response(r, HTTP_CONFLICT,
+ "Cannot checkout this type of resource.");
+ }
+
+ if (!resource->versioned) {
+ return dav_error_response(r, HTTP_CONFLICT,
+ "Cannot checkout unversioned resource.");
+ }
+
+ if (resource->working) {
+ return dav_error_response(r, HTTP_CONFLICT,
+ "The resource is already checked out to the workspace.");
+ }
+
+ /* ### do lock checks, once behavior is defined */
+
+ /* Do the checkout */
+ if ((err = (*vsn_hooks->checkout)(resource, 0 /*auto_checkout*/,
+ is_unreserved, is_fork_ok,
+ create_activity, activities,
+ &working_resource)) != NULL) {
+ err = dav_push_error(r->pool, HTTP_CONFLICT, 0,
+ apr_psprintf(r->pool,
+ "Could not CHECKOUT resource %s.",
+ ap_escape_html(r->pool, r->uri)),
+ err);
+ return dav_handle_err(r, err, NULL);
+ }
+
+ /* set the Cache-Control header, per the spec */
+ apr_table_setn(r->headers_out, "Cache-Control", "no-cache");
+
+ /* if no working resource created, return OK,
+ * else return CREATED with working resource URL in Location header
+ */
+ if (working_resource == NULL) {
+ /* no body */
+ ap_set_content_length(r, 0);
+ return DONE;
+ }
+
+ return dav_created(r, working_resource->uri, "Checked-out resource", 0);
+}
+
+/* handle the UNCHECKOUT method */
+static int dav_method_uncheckout(request_rec *r)
+{
+ dav_resource *resource;
+ const dav_hooks_vsn *vsn_hooks = DAV_GET_HOOKS_VSN(r);
+ dav_error *err;
+ int result;
+
+ /* If no versioning provider, decline the request */
+ if (vsn_hooks == NULL)
+ return DECLINED;
+
+ if ((result = ap_discard_request_body(r)) != OK) {
+ return result;
+ }
+
+ /* Ask repository module to resolve the resource */
+ err = dav_get_resource(r, 0 /* label_allowed */, 0 /* use_checked_in */,
+ &resource);
+ if (err != NULL)
+ return dav_handle_err(r, err, NULL);
+
+ /* check for any method preconditions */
+ if (dav_run_method_precondition(r, resource, NULL, NULL, &err) != DECLINED
+ && err) {
+ return dav_handle_err(r, err, NULL);
+ }
+
+ if (!resource->exists) {
+ /* Apache will supply a default error for this. */
+ return HTTP_NOT_FOUND;
+ }
+
+ /* Check the state of the resource: must be a file or collection,
+ * must be versioned, and must be checked out.
+ */
+ if (resource->type != DAV_RESOURCE_TYPE_REGULAR) {
+ return dav_error_response(r, HTTP_CONFLICT,
+ "Cannot uncheckout this type of resource.");
+ }
+
+ if (!resource->versioned) {
+ return dav_error_response(r, HTTP_CONFLICT,
+ "Cannot uncheckout unversioned resource.");
+ }
+
+ if (!resource->working) {
+ return dav_error_response(r, HTTP_CONFLICT,
+ "The resource is not checked out to the workspace.");
+ }
+
+ /* ### do lock checks, once behavior is defined */
+
+ /* Do the uncheckout */
+ if ((err = (*vsn_hooks->uncheckout)(resource)) != NULL) {
+ err = dav_push_error(r->pool, HTTP_CONFLICT, 0,
+ apr_psprintf(r->pool,
+ "Could not UNCHECKOUT resource %s.",
+ ap_escape_html(r->pool, r->uri)),
+ err);
+ return dav_handle_err(r, err, NULL);
+ }
+
+ /* no body */
+ ap_set_content_length(r, 0);
+
+ return DONE;
+}
+
+/* handle the CHECKIN method */
+static int dav_method_checkin(request_rec *r)
+{
+ dav_resource *resource;
+ dav_resource *new_version;
+ const dav_hooks_vsn *vsn_hooks = DAV_GET_HOOKS_VSN(r);
+ dav_error *err;
+ int result;
+ apr_xml_doc *doc;
+ int keep_checked_out = 0;
+
+ /* If no versioning provider, decline the request */
+ if (vsn_hooks == NULL)
+ return DECLINED;
+
+ if ((result = ap_xml_parse_input(r, &doc)) != OK)
+ return result;
+
+ if (doc != NULL) {
+ if (!dav_validate_root(doc, "checkin")) {
+ /* This supplies additional information for the default msg. */
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00603)
+ "The request body, if present, must be a "
+ "DAV:checkin element.");
+ return HTTP_BAD_REQUEST;
+ }
+
+ keep_checked_out = dav_find_child(doc->root, "keep-checked-out") != NULL;
+ }
+
+ /* Ask repository module to resolve the resource */
+ err = dav_get_resource(r, 0 /* label_allowed */, 0 /* use_checked_in */,
+ &resource);
+ if (err != NULL)
+ return dav_handle_err(r, err, NULL);
+
+ /* check for any method preconditions */
+ if (dav_run_method_precondition(r, resource, NULL, doc, &err) != DECLINED
+ && err) {
+ return dav_handle_err(r, err, NULL);
+ }
+
+ if (!resource->exists) {
+ /* Apache will supply a default error for this. */
+ return HTTP_NOT_FOUND;
+ }
+
+ /* Check the state of the resource: must be a file or collection,
+ * must be versioned, and must be checked out.
+ */
+ if (resource->type != DAV_RESOURCE_TYPE_REGULAR) {
+ return dav_error_response(r, HTTP_CONFLICT,
+ "Cannot checkin this type of resource.");
+ }
+
+ if (!resource->versioned) {
+ return dav_error_response(r, HTTP_CONFLICT,
+ "Cannot checkin unversioned resource.");
+ }
+
+ if (!resource->working) {
+ return dav_error_response(r, HTTP_CONFLICT,
+ "The resource is not checked out.");
+ }
+
+ /* ### do lock checks, once behavior is defined */
+
+ /* Do the checkin */
+ if ((err = (*vsn_hooks->checkin)(resource, keep_checked_out, &new_version))
+ != NULL) {
+ err = dav_push_error(r->pool, HTTP_CONFLICT, 0,
+ apr_psprintf(r->pool,
+ "Could not CHECKIN resource %s.",
+ ap_escape_html(r->pool, r->uri)),
+ err);
+ return dav_handle_err(r, err, NULL);
+ }
+
+ return dav_created(r, new_version->uri, "Version", 0);
+}
+
+static int dav_method_update(request_rec *r)
+{
+ dav_resource *resource;
+ dav_resource *version = NULL;
+ const dav_hooks_vsn *vsn_hooks = DAV_GET_HOOKS_VSN(r);
+ apr_xml_doc *doc;
+ apr_xml_elem *child;
+ int is_label = 0;
+ int depth;
+ int result;
+ apr_size_t tsize;
+ const char *target;
+ dav_response *multi_response;
+ dav_error *err;
+ dav_lookup_result lookup;
+
+ /* If no versioning provider, or UPDATE not supported,
+ * decline the request */
+ if (vsn_hooks == NULL || vsn_hooks->update == NULL)
+ return DECLINED;
+
+ if ((depth = dav_get_depth(r, 0)) < 0) {
+ /* dav_get_depth() supplies additional information for the
+ * default message. */
+ return HTTP_BAD_REQUEST;
+ }
+
+ /* parse the request body */
+ if ((result = ap_xml_parse_input(r, &doc)) != OK) {
+ return result;
+ }
+
+ if (doc == NULL || !dav_validate_root(doc, "update")) {
+ /* This supplies additional information for the default message. */
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00604)
+ "The request body does not contain "
+ "an \"update\" element.");
+ return HTTP_BAD_REQUEST;
+ }
+
+ /* check for label-name or version element, but not both */
+ if ((child = dav_find_child(doc->root, "label-name")) != NULL)
+ is_label = 1;
+ else if ((child = dav_find_child(doc->root, "version")) != NULL) {
+ /* get the href element */
+ if ((child = dav_find_child(child, "href")) == NULL) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00605)
+ "The version element does not contain "
+ "an \"href\" element.");
+ return HTTP_BAD_REQUEST;
+ }
+ }
+ else {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00606)
+ "The \"update\" element does not contain "
+ "a \"label-name\" or \"version\" element.");
+ return HTTP_BAD_REQUEST;
+ }
+
+ /* a depth greater than zero is only allowed for a label */
+ if (!is_label && depth != 0) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00607)
+ "Depth must be zero for UPDATE with a version");
+ return HTTP_BAD_REQUEST;
+ }
+
+ /* get the target value (a label or a version URI) */
+ apr_xml_to_text(r->pool, child, APR_XML_X2T_INNER, NULL, NULL,
+ &target, &tsize);
+ if (tsize == 0) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00608)
+ "A \"label-name\" or \"href\" element does not contain "
+ "any content.");
+ return HTTP_BAD_REQUEST;
+ }
+
+ /* Ask repository module to resolve the resource */
+ err = dav_get_resource(r, 0 /* label_allowed */, 0 /* use_checked_in */,
+ &resource);
+ if (err != NULL)
+ return dav_handle_err(r, err, NULL);
+
+ /* check for any method preconditions */
+ if (dav_run_method_precondition(r, resource, NULL, doc, &err) != DECLINED
+ && err) {
+ return dav_handle_err(r, err, NULL);
+ }
+
+ if (!resource->exists) {
+ /* Apache will supply a default error for this. */
+ return HTTP_NOT_FOUND;
+ }
+
+ /* ### need a general mechanism for reporting precondition violations
+ * ### (should be returning XML document for 403/409 responses)
+ */
+ if (resource->type != DAV_RESOURCE_TYPE_REGULAR
+ || !resource->versioned || resource->working) {
+ return dav_error_response(r, HTTP_CONFLICT,
+ "<DAV:must-be-checked-in-version-controlled-resource>");
+ }
+
+ /* if target is a version, resolve the version resource */
+ /* ### dav_lookup_uri only allows absolute URIs; is that OK? */
+ if (!is_label) {
+ lookup = dav_lookup_uri(target, r, 0 /* must_be_absolute */);
+ if (lookup.rnew == NULL) {
+ if (lookup.err.status == HTTP_BAD_REQUEST) {
+ /* This supplies additional information for the default message. */
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00609)
+ "%s", lookup.err.desc);
+ return HTTP_BAD_REQUEST;
+ }
+
+ /* ### this assumes that dav_lookup_uri() only generates a status
+ * ### that Apache can provide a status line for!! */
+
+ return dav_error_response(r, lookup.err.status, lookup.err.desc);
+ }
+ if (lookup.rnew->status != HTTP_OK) {
+ /* ### how best to report this... */
+ return dav_error_response(r, lookup.rnew->status,
+ "Version URI had an error.");
+ }
+
+ /* resolve version resource */
+ err = dav_get_resource(lookup.rnew, 0 /* label_allowed */,
+ 0 /* use_checked_in */, &version);
+ if (err != NULL)
+ return dav_handle_err(r, err, NULL);
+
+ /* NULL out target, since we're using a version resource */
+ target = NULL;
+ }
+
+ /* do the UPDATE operation */
+ err = (*vsn_hooks->update)(resource, version, target, depth, &multi_response);
+
+ if (err != NULL) {
+ err = dav_push_error(r->pool, err->status, 0,
+ apr_psprintf(r->pool,
+ "Could not UPDATE %s.",
+ ap_escape_html(r->pool, r->uri)),
+ err);
+ return dav_handle_err(r, err, multi_response);
+ }
+
+ /* set the Cache-Control header, per the spec */
+ apr_table_setn(r->headers_out, "Cache-Control", "no-cache");
+
+ /* no body */
+ ap_set_content_length(r, 0);
+
+ return DONE;
+}
+
+/* context maintained during LABEL treewalk */
+typedef struct dav_label_walker_ctx
+{
+ /* input: */
+ dav_walk_params w;
+
+ /* original request */
+ request_rec *r;
+
+ /* label being manipulated */
+ const char *label;
+
+ /* label operation */
+ int label_op;
+#define DAV_LABEL_ADD 1
+#define DAV_LABEL_SET 2
+#define DAV_LABEL_REMOVE 3
+
+ /* version provider hooks */
+ const dav_hooks_vsn *vsn_hooks;
+
+} dav_label_walker_ctx;
+
+static dav_error * dav_label_walker(dav_walk_resource *wres, int calltype)
+{
+ dav_label_walker_ctx *ctx = wres->walk_ctx;
+ dav_error *err = NULL;
+
+ /* check for any method preconditions */
+ if (dav_run_method_precondition(ctx->r, NULL, wres->resource, NULL, &err) != DECLINED
+ && err) {
+ /* precondition failed, dropping through */
+ }
+
+ /* Check the state of the resource: must be a version or
+ * non-checkedout version selector
+ */
+ /* ### need a general mechanism for reporting precondition violations
+ * ### (should be returning XML document for 403/409 responses)
+ */
+ else if (wres->resource->type != DAV_RESOURCE_TYPE_VERSION &&
+ (wres->resource->type != DAV_RESOURCE_TYPE_REGULAR
+ || !wres->resource->versioned)) {
+ err = dav_new_error(ctx->w.pool, HTTP_CONFLICT, 0, 0,
+ "<DAV:must-be-version-or-version-selector/>");
+ }
+ else if (wres->resource->working) {
+ err = dav_new_error(ctx->w.pool, HTTP_CONFLICT, 0, 0,
+ "<DAV:must-not-be-checked-out/>");
+ }
+ else {
+ /* do the label operation */
+ if (ctx->label_op == DAV_LABEL_REMOVE)
+ err = (*ctx->vsn_hooks->remove_label)(wres->resource, ctx->label);
+ else
+ err = (*ctx->vsn_hooks->add_label)(wres->resource, ctx->label,
+ ctx->label_op == DAV_LABEL_SET);
+ }
+
+ if (err != NULL) {
+ /* ### need utility routine to add response with description? */
+ dav_add_response(wres, err->status, NULL);
+ wres->response->desc = err->desc;
+ }
+
+ return NULL;
+}
+
+static int dav_method_label(request_rec *r)
+{
+ dav_resource *resource;
+ const dav_hooks_vsn *vsn_hooks = DAV_GET_HOOKS_VSN(r);
+ apr_xml_doc *doc;
+ apr_xml_elem *child;
+ int depth;
+ int result;
+ apr_size_t tsize;
+ dav_error *err;
+ dav_label_walker_ctx ctx = { { 0 } };
+ dav_response *multi_status;
+
+ /* If no versioning provider, or the provider doesn't support
+ * labels, decline the request */
+ if (vsn_hooks == NULL || vsn_hooks->add_label == NULL)
+ return DECLINED;
+
+ /* parse the request body */
+ if ((result = ap_xml_parse_input(r, &doc)) != OK) {
+ return result;
+ }
+
+ /* Ask repository module to resolve the resource */
+ err = dav_get_resource(r, 1 /* label_allowed */, 0 /* use_checked_in */,
+ &resource);
+ if (err != NULL)
+ return dav_handle_err(r, err, NULL);
+
+ /* check for any method preconditions */
+ if (dav_run_method_precondition(r, resource, NULL, doc, &err) != DECLINED
+ && err) {
+ return dav_handle_err(r, err, NULL);
+ }
+
+ if (!resource->exists) {
+ /* Apache will supply a default error for this. */
+ return HTTP_NOT_FOUND;
+ }
+
+ if ((depth = dav_get_depth(r, 0)) < 0) {
+ /* dav_get_depth() supplies additional information for the
+ * default message. */
+ return HTTP_BAD_REQUEST;
+ }
+
+ if (doc == NULL || !dav_validate_root(doc, "label")) {
+ /* This supplies additional information for the default message. */
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00610)
+ "The request body does not contain "
+ "a \"label\" element.");
+ return HTTP_BAD_REQUEST;
+ }
+
+ /* check for add, set, or remove element */
+ if ((child = dav_find_child(doc->root, "add")) != NULL) {
+ ctx.label_op = DAV_LABEL_ADD;
+ }
+ else if ((child = dav_find_child(doc->root, "set")) != NULL) {
+ ctx.label_op = DAV_LABEL_SET;
+ }
+ else if ((child = dav_find_child(doc->root, "remove")) != NULL) {
+ ctx.label_op = DAV_LABEL_REMOVE;
+ }
+ else {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00611)
+ "The \"label\" element does not contain "
+ "an \"add\", \"set\", or \"remove\" element.");
+ return HTTP_BAD_REQUEST;
+ }
+
+ /* get the label string */
+ if ((child = dav_find_child(child, "label-name")) == NULL) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00612)
+ "The label command element does not contain "
+ "a \"label-name\" element.");
+ return HTTP_BAD_REQUEST;
+ }
+
+ apr_xml_to_text(r->pool, child, APR_XML_X2T_INNER, NULL, NULL,
+ &ctx.label, &tsize);
+ if (tsize == 0) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00613)
+ "A \"label-name\" element does not contain "
+ "a label name.");
+ return HTTP_BAD_REQUEST;
+ }
+
+ /* do the label operation walk */
+ ctx.w.walk_type = DAV_WALKTYPE_NORMAL;
+ ctx.w.func = dav_label_walker;
+ ctx.w.walk_ctx = &ctx;
+ ctx.w.pool = r->pool;
+ ctx.w.root = resource;
+ ctx.r = r;
+ ctx.vsn_hooks = vsn_hooks;
+
+ err = (*resource->hooks->walk)(&ctx.w, depth, &multi_status);
+
+ if (err != NULL) {
+ /* some sort of error occurred which terminated the walk */
+ err = dav_push_error(r->pool, err->status, 0,
+ "The LABEL operation was terminated prematurely.",
+ err);
+ return dav_handle_err(r, err, multi_status);
+ }
+
+ if (multi_status != NULL) {
+ /* One or more resources had errors. If depth was zero, convert
+ * response to simple error, else make sure there is an
+ * overall error to pass to dav_handle_err()
+ */
+ if (depth == 0) {
+ err = dav_new_error(r->pool, multi_status->status, 0, 0,
+ multi_status->desc);
+ multi_status = NULL;
+ }
+ else {
+ err = dav_new_error(r->pool, HTTP_MULTI_STATUS, 0, 0,
+ "Errors occurred during the LABEL operation.");
+ }
+
+ return dav_handle_err(r, err, multi_status);
+ }
+
+ /* set the Cache-Control header, per the spec */
+ apr_table_setn(r->headers_out, "Cache-Control", "no-cache");
+
+ /* no body */
+ ap_set_content_length(r, 0);
+
+ return DONE;
+}
+
+static int dav_core_deliver_report(request_rec *r,
+ const dav_resource *resource,
+ const apr_xml_doc *doc,
+ ap_filter_t *output, dav_error **err)
+{
+ const dav_hooks_vsn *vsn_hooks = DAV_GET_HOOKS_VSN(r);
+
+ if (vsn_hooks) {
+ *err = (*vsn_hooks->deliver_report)(r, resource, doc,
+ r->output_filters);
+ return OK;
+ }
+
+ return DECLINED;
+}
+
+static void dav_core_gather_reports(
+ request_rec *r,
+ const dav_resource *resource,
+ apr_array_header_t *reports,
+ dav_error **err)
+{
+ const dav_hooks_vsn *vsn_hooks = DAV_GET_HOOKS_VSN(r);
+
+ if (vsn_hooks) {
+ const dav_report_elem *rp;
+
+ (*err) = (*vsn_hooks->avail_reports)(resource, &rp);
+ while (rp && rp->name) {
+
+ dav_report_elem *report = apr_array_push(reports);
+
+ report->nmspace = rp->nmspace;
+ report->name = rp->name;
+
+ rp++;
+ }
+ }
+
+}
+
+static int dav_method_report(request_rec *r)
+{
+ dav_resource *resource;
+ const dav_hooks_vsn *vsn_hooks = DAV_GET_HOOKS_VSN(r);
+ apr_xml_doc *doc;
+ dav_error *err = NULL;
+
+ int result;
+ int label_allowed;
+
+ if ((result = ap_xml_parse_input(r, &doc)) != OK) {
+ return result;
+ }
+ if (doc == NULL) {
+ /* This supplies additional information for the default msg. */
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00614)
+ "The request body must specify a report.");
+ return HTTP_BAD_REQUEST;
+ }
+
+ /* Ask repository module to resolve the resource.
+ * First determine whether a Target-Selector header is allowed
+ * for this report.
+ */
+ label_allowed = vsn_hooks ? (*vsn_hooks->report_label_header_allowed)(doc) : 0;
+ err = dav_get_resource(r, label_allowed, 0 /* use_checked_in */,
+ &resource);
+ if (err != NULL) {
+ return dav_handle_err(r, err, NULL);
+ }
+
+ /* check for any method preconditions */
+ if (dav_run_method_precondition(r, resource, NULL, doc, &err) != DECLINED
+ && err) {
+ return dav_handle_err(r, err, NULL);
+ }
+
+ if (!resource->exists) {
+ /* Apache will supply a default error for this. */
+ return HTTP_NOT_FOUND;
+ }
+
+ /* set up defaults for the report response */
+ r->status = HTTP_OK;
+ ap_set_content_type(r, DAV_XML_CONTENT_TYPE);
+ err = NULL;
+
+ /* run report hook */
+ result = dav_run_deliver_report(r, resource, doc,
+ r->output_filters, &err);
+ if (err != NULL) {
+
+ if (! r->sent_bodyct) {
+ /* No data has been sent to client yet; throw normal error. */
+ return dav_handle_err(r, err, NULL);
+ }
+
+ /* If an error occurred during the report delivery, there's
+ basically nothing we can do but abort the connection and
+ log an error. This is one of the limitations of HTTP; it
+ needs to "know" the entire status of the response before
+ generating it, which is just impossible in these streamy
+ response situations. */
+ err = dav_push_error(r->pool, err->status, 0,
+ "Provider encountered an error while streaming"
+ " a REPORT response.", err);
+ dav_log_err(r, err, APLOG_ERR);
+ r->connection->aborted = 1;
+
+ return DONE;
+ }
+ switch (result) {
+ case OK:
+ return DONE;
+ case DECLINED:
+ /* No one handled the report */
+ return HTTP_NOT_IMPLEMENTED;
+ default:
+ return DONE;
+ }
+
+ return DONE;
+}
+
+static int dav_method_make_workspace(request_rec *r)
+{
+ dav_resource *resource;
+ const dav_hooks_vsn *vsn_hooks = DAV_GET_HOOKS_VSN(r);
+ dav_error *err;
+ apr_xml_doc *doc;
+ int result;
+
+ /* if no versioning provider, or the provider does not support workspaces,
+ * decline the request
+ */
+ if (vsn_hooks == NULL || vsn_hooks->make_workspace == NULL)
+ return DECLINED;
+
+ /* ask repository module to resolve the resource */
+ err = dav_get_resource(r, 0 /* label_allowed */, 0 /* use_checked_in */,
+ &resource);
+ if (err != NULL)
+ return dav_handle_err(r, err, NULL);
+
+ /* parse the request body (must be a mkworkspace element) */
+ if ((result = ap_xml_parse_input(r, &doc)) != OK) {
+ return result;
+ }
+
+ /* check for any method preconditions */
+ if (dav_run_method_precondition(r, resource, NULL, doc, &err) != DECLINED
+ && err) {
+ return dav_handle_err(r, err, NULL);
+ }
+
+ if (doc == NULL
+ || !dav_validate_root(doc, "mkworkspace")) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00615)
+ "The request body does not contain "
+ "a \"mkworkspace\" element.");
+ return HTTP_BAD_REQUEST;
+ }
+
+ /* Check request preconditions */
+
+ /* ### need a general mechanism for reporting precondition violations
+ * ### (should be returning XML document for 403/409 responses)
+ */
+
+ /* resource must not already exist */
+ if (resource->exists) {
+ err = dav_new_error(r->pool, HTTP_CONFLICT, 0, 0,
+ "<DAV:resource-must-be-null/>");
+ return dav_handle_err(r, err, NULL);
+ }
+
+ /* ### what about locking? */
+
+ /* attempt to create the workspace */
+ if ((err = (*vsn_hooks->make_workspace)(resource, doc)) != NULL) {
+ err = dav_push_error(r->pool, err->status, 0,
+ apr_psprintf(r->pool,
+ "Could not create workspace %s.",
+ ap_escape_html(r->pool, r->uri)),
+ err);
+ return dav_handle_err(r, err, NULL);
+ }
+
+ /* set the Cache-Control header, per the spec */
+ apr_table_setn(r->headers_out, "Cache-Control", "no-cache");
+
+ /* return an appropriate response (HTTP_CREATED) */
+ return dav_created(r, resource->uri, "Workspace", 0 /*replaced*/);
+}
+
+static int dav_method_make_activity(request_rec *r)
+{
+ dav_resource *resource;
+ const dav_hooks_vsn *vsn_hooks = DAV_GET_HOOKS_VSN(r);
+ dav_error *err;
+ int result;
+
+ /* if no versioning provider, or the provider does not support activities,
+ * decline the request
+ */
+ if (vsn_hooks == NULL || vsn_hooks->make_activity == NULL)
+ return DECLINED;
+
+ /* ask repository module to resolve the resource */
+ err = dav_get_resource(r, 0 /* label_allowed */, 0 /* use_checked_in */,
+ &resource);
+ if (err != NULL)
+ return dav_handle_err(r, err, NULL);
+
+ /* check for any method preconditions */
+ if (dav_run_method_precondition(r, resource, NULL, NULL, &err) != DECLINED
+ && err) {
+ return dav_handle_err(r, err, NULL);
+ }
+
+ /* MKACTIVITY does not have a defined request body. */
+ if ((result = ap_discard_request_body(r)) != OK) {
+ return result;
+ }
+
+ /* Check request preconditions */
+
+ /* ### need a general mechanism for reporting precondition violations
+ * ### (should be returning XML document for 403/409 responses)
+ */
+
+ /* resource must not already exist */
+ if (resource->exists) {
+ err = dav_new_error(r->pool, HTTP_CONFLICT, 0, 0,
+ "<DAV:resource-must-be-null/>");
+ return dav_handle_err(r, err, NULL);
+ }
+
+ /* the provider must say whether the resource can be created as
+ an activity, i.e. whether the location is ok. */
+ if (vsn_hooks->can_be_activity != NULL
+ && !(*vsn_hooks->can_be_activity)(resource)) {
+ err = dav_new_error(r->pool, HTTP_FORBIDDEN, 0, 0,
+ "<DAV:activity-location-ok/>");
+ return dav_handle_err(r, err, NULL);
+ }
+
+ /* ### what about locking? */
+
+ /* attempt to create the activity */
+ if ((err = (*vsn_hooks->make_activity)(resource)) != NULL) {
+ err = dav_push_error(r->pool, err->status, 0,
+ apr_psprintf(r->pool,
+ "Could not create activity %s.",
+ ap_escape_html(r->pool, r->uri)),
+ err);
+ return dav_handle_err(r, err, NULL);
+ }
+
+ /* set the Cache-Control header, per the spec */
+ apr_table_setn(r->headers_out, "Cache-Control", "no-cache");
+
+ /* return an appropriate response (HTTP_CREATED) */
+ return dav_created(r, resource->uri, "Activity", 0 /*replaced*/);
+}
+
+static int dav_method_baseline_control(request_rec *r)
+{
+ /* ### */
+ return HTTP_METHOD_NOT_ALLOWED;
+}
+
+static int dav_method_merge(request_rec *r)
+{
+ dav_resource *resource;
+ dav_resource *source_resource;
+ const dav_hooks_vsn *vsn_hooks = DAV_GET_HOOKS_VSN(r);
+ dav_error *err;
+ int result;
+ apr_xml_doc *doc;
+ apr_xml_elem *source_elem;
+ apr_xml_elem *href_elem;
+ apr_xml_elem *prop_elem;
+ const char *source;
+ int no_auto_merge;
+ int no_checkout;
+ dav_lookup_result lookup;
+
+ /* If no versioning provider, decline the request */
+ if (vsn_hooks == NULL)
+ return DECLINED;
+
+ if ((result = ap_xml_parse_input(r, &doc)) != OK)
+ return result;
+
+ if (doc == NULL || !dav_validate_root(doc, "merge")) {
+ /* This supplies additional information for the default msg. */
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00616)
+ "The request body must be present and must be a "
+ "DAV:merge element.");
+ return HTTP_BAD_REQUEST;
+ }
+
+ if ((source_elem = dav_find_child(doc->root, "source")) == NULL) {
+ /* This supplies additional information for the default msg. */
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00617)
+ "The DAV:merge element must contain a DAV:source "
+ "element.");
+ return HTTP_BAD_REQUEST;
+ }
+ if ((href_elem = dav_find_child(source_elem, "href")) == NULL) {
+ /* This supplies additional information for the default msg. */
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00618)
+ "The DAV:source element must contain a DAV:href "
+ "element.");
+ return HTTP_BAD_REQUEST;
+ }
+ source = dav_xml_get_cdata(href_elem, r->pool, 1 /* strip_white */);
+
+ /* get a subrequest for the source, so that we can get a dav_resource
+ for that source. */
+ lookup = dav_lookup_uri(source, r, 0 /* must_be_absolute */);
+ if (lookup.rnew == NULL) {
+ if (lookup.err.status == HTTP_BAD_REQUEST) {
+ /* This supplies additional information for the default message. */
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00619)
+ "%s", lookup.err.desc);
+ return HTTP_BAD_REQUEST;
+ }
+
+ /* ### this assumes that dav_lookup_uri() only generates a status
+ * ### that Apache can provide a status line for!! */
+
+ return dav_error_response(r, lookup.err.status, lookup.err.desc);
+ }
+ if (lookup.rnew->status != HTTP_OK) {
+ /* ### how best to report this... */
+ return dav_error_response(r, lookup.rnew->status,
+ "Merge source URI had an error.");
+ }
+ err = dav_get_resource(lookup.rnew, 0 /* label_allowed */,
+ 0 /* use_checked_in */, &source_resource);
+ if (err != NULL)
+ return dav_handle_err(r, err, NULL);
+
+ /* check for any method preconditions */
+ if (dav_run_method_precondition(r, source_resource, NULL, doc, &err) != DECLINED
+ && err) {
+ return dav_handle_err(r, err, NULL);
+ }
+
+ no_auto_merge = dav_find_child(doc->root, "no-auto-merge") != NULL;
+ no_checkout = dav_find_child(doc->root, "no-checkout") != NULL;
+
+ prop_elem = dav_find_child(doc->root, "prop");
+
+ /* ### check RFC. I believe the DAV:merge element may contain any
+ ### element also allowed within DAV:checkout. need to extract them
+ ### here, and pass them along.
+ ### if so, then refactor the CHECKOUT method handling so we can reuse
+ ### the code. maybe create a structure to hold CHECKOUT parameters
+ ### which can be passed to the checkout() and merge() hooks. */
+
+ /* Ask repository module to resolve the resource */
+ err = dav_get_resource(r, 0 /* label_allowed */, 0 /* use_checked_in */,
+ &resource);
+ if (err != NULL)
+ return dav_handle_err(r, err, NULL);
+
+ /* check for any method preconditions */
+ if (dav_run_method_precondition(r, source_resource, resource, doc, &err) != DECLINED
+ && err) {
+ return dav_handle_err(r, err, NULL);
+ }
+
+ if (!resource->exists) {
+ /* Apache will supply a default error for this. */
+ return HTTP_NOT_FOUND;
+ }
+
+ /* ### check the source and target resources flags/types */
+
+ /* ### do lock checks, once behavior is defined */
+
+ /* set the Cache-Control header, per the spec */
+ /* ### correct? */
+ apr_table_setn(r->headers_out, "Cache-Control", "no-cache");
+
+ /* Initialize these values for a standard MERGE response. If the MERGE
+ is going to do something different (i.e. an error), then it must
+ return a dav_error, and we'll reset these values properly. */
+ r->status = HTTP_OK;
+ ap_set_content_type(r, "text/xml");
+
+ /* ### should we do any preliminary response generation? probably not,
+ ### because we may have an error, thus demanding something else in
+ ### the response body. */
+
+ /* Do the merge, including any response generation. */
+ if ((err = (*vsn_hooks->merge)(resource, source_resource,
+ no_auto_merge, no_checkout,
+ prop_elem,
+ r->output_filters)) != NULL) {
+ /* ### is err->status the right error here? */
+ err = dav_push_error(r->pool, err->status, 0,
+ apr_psprintf(r->pool,
+ "Could not MERGE resource \"%s\" "
+ "into \"%s\".",
+ ap_escape_html(r->pool, source),
+ ap_escape_html(r->pool, r->uri)),
+ err);
+ return dav_handle_err(r, err, NULL);
+ }
+
+ /* the response was fully generated by the merge() hook. */
+ /* ### urk. does this prevent logging? need to check... */
+ return DONE;
+}
+
+static int dav_method_bind(request_rec *r)
+{
+ dav_resource *resource;
+ dav_resource *binding;
+ dav_auto_version_info av_info;
+ const dav_hooks_binding *binding_hooks = DAV_GET_HOOKS_BINDING(r);
+ const char *dest;
+ dav_error *err;
+ dav_error *err2;
+ dav_response *multi_response = NULL;
+ dav_lookup_result lookup;
+ int overwrite;
+
+ /* If no bindings provider, decline the request */
+ if (binding_hooks == NULL)
+ return DECLINED;
+
+ /* Ask repository module to resolve the resource */
+ err = dav_get_resource(r, 0 /* label_allowed */, 0 /* use_checked_in */,
+ &resource);
+ if (err != NULL)
+ return dav_handle_err(r, err, NULL);
+
+ /* check for any method preconditions */
+ if (dav_run_method_precondition(r, resource, NULL, NULL, &err) != DECLINED
+ && err) {
+ return dav_handle_err(r, err, NULL);
+ }
+
+ if (!resource->exists) {
+ /* Apache will supply a default error for this. */
+ return HTTP_NOT_FOUND;
+ }
+
+ /* get the destination URI */
+ dest = apr_table_get(r->headers_in, "Destination");
+ if (dest == NULL) {
+ /* This supplies additional information for the default message. */
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00620)
+ "The request is missing a Destination header.");
+ return HTTP_BAD_REQUEST;
+ }
+
+ lookup = dav_lookup_uri(dest, r, 0 /* must_be_absolute */);
+ if (lookup.rnew == NULL) {
+ if (lookup.err.status == HTTP_BAD_REQUEST) {
+ /* This supplies additional information for the default message. */
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00621)
+ "%s", lookup.err.desc);
+ return HTTP_BAD_REQUEST;
+ }
+ else if (lookup.err.status == HTTP_BAD_GATEWAY) {
+ /* ### Bindings protocol draft 02 says to return 507
+ * ### (Cross Server Binding Forbidden); Apache already defines 507
+ * ### as HTTP_INSUFFICIENT_STORAGE. So, for now, we'll return
+ * ### HTTP_FORBIDDEN
+ */
+ return dav_error_response(r, HTTP_FORBIDDEN,
+ "Cross server bindings are not "
+ "allowed by this server.");
+ }
+
+ /* ### this assumes that dav_lookup_uri() only generates a status
+ * ### that Apache can provide a status line for!! */
+
+ return dav_error_response(r, lookup.err.status, lookup.err.desc);
+ }
+ if (lookup.rnew->status != HTTP_OK) {
+ /* ### how best to report this... */
+ return dav_error_response(r, lookup.rnew->status,
+ "Destination URI had an error.");
+ }
+
+ /* resolve binding resource */
+ err = dav_get_resource(lookup.rnew, 0 /* label_allowed */,
+ 0 /* use_checked_in */, &binding);
+ if (err != NULL)
+ return dav_handle_err(r, err, NULL);
+
+ /* check for any method preconditions */
+ if (dav_run_method_precondition(r, resource, binding, NULL, &err) != DECLINED
+ && err) {
+ return dav_handle_err(r, err, NULL);
+ }
+
+ /* are the two resources handled by the same repository? */
+ if (resource->hooks != binding->hooks) {
+ /* ### this message exposes some backend config, but screw it... */
+ return dav_error_response(r, HTTP_BAD_GATEWAY,
+ "Destination URI is handled by a "
+ "different repository than the source URI. "
+ "BIND between repositories is not possible.");
+ }
+
+ /* get and parse the overwrite header value */
+ if ((overwrite = dav_get_overwrite(r)) < 0) {
+ /* dav_get_overwrite() supplies additional information for the
+ * default message. */
+ return HTTP_BAD_REQUEST;
+ }
+
+ /* quick failure test: if dest exists and overwrite is false. */
+ if (binding->exists && !overwrite) {
+ return dav_error_response(r, HTTP_PRECONDITION_FAILED,
+ "Destination is not empty and "
+ "Overwrite is not \"T\"");
+ }
+
+ /* are the source and destination the same? */
+ if ((*resource->hooks->is_same_resource)(resource, binding)) {
+ return dav_error_response(r, HTTP_FORBIDDEN,
+ "Source and Destination URIs are the same.");
+ }
+
+ /*
+ * Check If-Headers and existing locks for destination. Note that we
+ * use depth==infinity since the target (hierarchy) will be deleted
+ * before the move/copy is completed.
+ *
+ * Note that we are overwriting the target, which implies a DELETE, so
+ * we are subject to the error/response rules as a DELETE. Namely, we
+ * will return a 424 error if any of the validations fail.
+ * (see dav_method_delete() for more information)
+ */
+ if ((err = dav_validate_request(lookup.rnew, binding, DAV_INFINITY, NULL,
+ &multi_response,
+ DAV_VALIDATE_PARENT
+ | DAV_VALIDATE_USE_424, NULL)) != NULL) {
+ err = dav_push_error(r->pool, err->status, 0,
+ apr_psprintf(r->pool,
+ "Could not BIND %s due to a "
+ "failed precondition on the "
+ "destination (e.g. locks).",
+ ap_escape_html(r->pool, r->uri)),
+ err);
+ return dav_handle_err(r, err, multi_response);
+ }
+
+ /* guard against creating circular bindings */
+ if (resource->collection
+ && (*resource->hooks->is_parent_resource)(resource, binding)) {
+ return dav_error_response(r, HTTP_FORBIDDEN,
+ "Source collection contains the Destination.");
+ }
+ if (resource->collection
+ && (*resource->hooks->is_parent_resource)(binding, resource)) {
+ /* The destination must exist (since it contains the source), and
+ * a condition above implies Overwrite==T. Obviously, we cannot
+ * delete the Destination before the BIND, as that would
+ * delete the Source.
+ */
+
+ return dav_error_response(r, HTTP_FORBIDDEN,
+ "Destination collection contains the Source and "
+ "Overwrite has been specified.");
+ }
+
+ /* prepare the destination collection for modification */
+ if ((err = dav_auto_checkout(r, binding, 1 /* parent_only */,
+ &av_info)) != NULL) {
+ /* could not make destination writable */
+ return dav_handle_err(r, err, NULL);
+ }
+
+ /* If target exists, remove it first (we know Ovewrite must be TRUE).
+ * Then try to bind to the resource.
+ */
+ if (binding->exists)
+ err = (*resource->hooks->remove_resource)(binding, &multi_response);
+
+ if (err == NULL) {
+ err = (*binding_hooks->bind_resource)(resource, binding);
+ }
+
+ /* restore parent collection states */
+ err2 = dav_auto_checkin(r, NULL,
+ err != NULL /* undo if error */,
+ 0 /* unlock */, &av_info);
+
+ /* check for error from remove/bind operations */
+ if (err != NULL) {
+ err = dav_push_error(r->pool, err->status, 0,
+ apr_psprintf(r->pool,
+ "Could not BIND %s.",
+ ap_escape_html(r->pool, r->uri)),
+ err);
+ return dav_handle_err(r, err, multi_response);
+ }
+
+ /* check for errors from reverting writability */
+ if (err2 != NULL) {
+ /* just log a warning */
+ err = dav_push_error(r->pool, err2->status, 0,
+ "The BIND was successful, but there was a "
+ "problem automatically checking in the "
+ "source parent collection.",
+ err2);
+ dav_log_err(r, err, APLOG_WARNING);
+ }
+
+ /* return an appropriate response (HTTP_CREATED) */
+ /* ### spec doesn't say what happens when destination was replaced */
+ return dav_created(r, lookup.rnew->unparsed_uri, "Binding", 0);
+}
+
+
+/*
+ * Response handler for DAV resources
+ */
+static int dav_handler(request_rec *r)
+{
+ if (strcmp(r->handler, DAV_HANDLER_NAME) != 0)
+ return DECLINED;
+
+ /* Reject requests with an unescaped hash character, as these may
+ * be more destructive than the user intended. */
+ if (r->parsed_uri.fragment != NULL) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00622)
+ "buggy client used un-escaped hash in Request-URI");
+ return dav_error_response(r, HTTP_BAD_REQUEST,
+ "The request was invalid: the URI included "
+ "an un-escaped hash character");
+ }
+
+ /* ### do we need to do anything with r->proxyreq ?? */
+
+ /*
+ * ### anything else to do here? could another module and/or
+ * ### config option "take over" the handler here? i.e. how do
+ * ### we lock down this hierarchy so that we are the ultimate
+ * ### arbiter? (or do we simply depend on the administrator
+ * ### to avoid conflicting configurations?)
+ */
+
+ /*
+ * Set up the methods mask, since that's one of the reasons this handler
+ * gets called, and lower-level things may need the info.
+ *
+ * First, set the mask to the methods we handle directly. Since by
+ * definition we own our managed space, we unconditionally set
+ * the r->allowed field rather than ORing our values with anything
+ * any other module may have put in there.
+ *
+ * These are the HTTP-defined methods that we handle directly.
+ */
+ r->allowed = 0
+ | (AP_METHOD_BIT << M_GET)
+ | (AP_METHOD_BIT << M_PUT)
+ | (AP_METHOD_BIT << M_DELETE)
+ | (AP_METHOD_BIT << M_OPTIONS)
+ | (AP_METHOD_BIT << M_INVALID);
+
+ /*
+ * These are the DAV methods we handle.
+ */
+ r->allowed |= 0
+ | (AP_METHOD_BIT << M_COPY)
+ | (AP_METHOD_BIT << M_LOCK)
+ | (AP_METHOD_BIT << M_UNLOCK)
+ | (AP_METHOD_BIT << M_MKCOL)
+ | (AP_METHOD_BIT << M_MOVE)
+ | (AP_METHOD_BIT << M_PROPFIND)
+ | (AP_METHOD_BIT << M_PROPPATCH);
+
+ /*
+ * These are methods that we don't handle directly, but let the
+ * server's default handler do for us as our agent.
+ */
+ r->allowed |= 0
+ | (AP_METHOD_BIT << M_POST);
+
+ /* ### hrm. if we return HTTP_METHOD_NOT_ALLOWED, then an Allow header
+ * ### is sent; it will need the other allowed states; since the default
+ * ### handler is not called on error, then it doesn't add the other
+ * ### allowed states, so we must
+ */
+
+ /* ### we might need to refine this for just where we return the error.
+ * ### also, there is the issue with other methods (see ISSUES)
+ */
+
+ /* dispatch the appropriate method handler */
+ if (r->method_number == M_GET) {
+ return dav_method_get(r);
+ }
+
+ if (r->method_number == M_PUT) {
+ return dav_method_put(r);
+ }
+
+ if (r->method_number == M_POST) {
+ return dav_method_post(r);
+ }
+
+ if (r->method_number == M_DELETE) {
+ return dav_method_delete(r);
+ }
+
+ if (r->method_number == M_OPTIONS) {
+ return dav_method_options(r);
+ }
+
+ if (r->method_number == M_PROPFIND) {
+ return dav_method_propfind(r);
+ }
+
+ if (r->method_number == M_PROPPATCH) {
+ return dav_method_proppatch(r);
+ }
+
+ if (r->method_number == M_MKCOL) {
+ return dav_method_mkcol(r);
+ }
+
+ if (r->method_number == M_COPY) {
+ return dav_method_copymove(r, DAV_DO_COPY);
+ }
+
+ if (r->method_number == M_MOVE) {
+ return dav_method_copymove(r, DAV_DO_MOVE);
+ }
+
+ if (r->method_number == M_LOCK) {
+ return dav_method_lock(r);
+ }
+
+ if (r->method_number == M_UNLOCK) {
+ return dav_method_unlock(r);
+ }
+
+ if (r->method_number == M_VERSION_CONTROL) {
+ return dav_method_vsn_control(r);
+ }
+
+ if (r->method_number == M_CHECKOUT) {
+ return dav_method_checkout(r);
+ }
+
+ if (r->method_number == M_UNCHECKOUT) {
+ return dav_method_uncheckout(r);
+ }
+
+ if (r->method_number == M_CHECKIN) {
+ return dav_method_checkin(r);
+ }
+
+ if (r->method_number == M_UPDATE) {
+ return dav_method_update(r);
+ }
+
+ if (r->method_number == M_LABEL) {
+ return dav_method_label(r);
+ }
+
+ if (r->method_number == M_REPORT) {
+ return dav_method_report(r);
+ }
+
+ if (r->method_number == M_MKWORKSPACE) {
+ return dav_method_make_workspace(r);
+ }
+
+ if (r->method_number == M_MKACTIVITY) {
+ return dav_method_make_activity(r);
+ }
+
+ if (r->method_number == M_BASELINE_CONTROL) {
+ return dav_method_baseline_control(r);
+ }
+
+ if (r->method_number == M_MERGE) {
+ return dav_method_merge(r);
+ }
+
+ /* BIND method */
+ if (r->method_number == dav_methods[DAV_M_BIND]) {
+ return dav_method_bind(r);
+ }
+
+ /* DASL method */
+ if (r->method_number == dav_methods[DAV_M_SEARCH]) {
+ return dav_method_search(r);
+ }
+
+ /* ### add'l methods for Advanced Collections, ACLs */
+
+ return DECLINED;
+}
+
+static int dav_fixups(request_rec *r)
+{
+ dav_dir_conf *conf;
+
+ /* quickly ignore any HTTP/0.9 requests which aren't subreqs. */
+ if (r->assbackwards && !r->main) {
+ return DECLINED;
+ }
+
+ conf = (dav_dir_conf *)ap_get_module_config(r->per_dir_config,
+ &dav_module);
+
+ /* if DAV is not enabled, then we've got nothing to do */
+ if (conf->provider == NULL) {
+ return DECLINED;
+ }
+
+ /* We are going to handle almost every request. In certain cases,
+ the provider maps to the filesystem (thus, handle_get is
+ FALSE), and core Apache will handle it. a For that case, we
+ just return right away. */
+ if (r->method_number == M_GET) {
+ /*
+ * ### need some work to pull Content-Type and Content-Language
+ * ### from the property database.
+ */
+
+ /*
+ * If the repository hasn't indicated that it will handle the
+ * GET method, then just punt.
+ *
+ * ### this isn't quite right... taking over the response can break
+ * ### things like mod_negotiation. need to look into this some more.
+ */
+ if (!conf->provider->repos->handle_get) {
+ return DECLINED;
+ }
+ }
+
+ /* ### this is wrong. We should only be setting the r->handler for the
+ * requests that mod_dav knows about. If we set the handler for M_POST
+ * requests, then CGI scripts that use POST will return the source for the
+ * script. However, mod_dav DOES handle POST, so something else needs
+ * to be fixed.
+ */
+ if (r->method_number != M_POST) {
+
+ /* We are going to be handling the response for this resource. */
+ r->handler = DAV_HANDLER_NAME;
+ return OK;
+ }
+
+ return DECLINED;
+}
+
+static void register_hooks(apr_pool_t *p)
+{
+ ap_hook_handler(dav_handler, NULL, NULL, APR_HOOK_MIDDLE);
+ ap_hook_post_config(dav_init_handler, NULL, NULL, APR_HOOK_MIDDLE);
+ ap_hook_fixups(dav_fixups, NULL, NULL, APR_HOOK_MIDDLE);
+
+ dav_hook_find_liveprop(dav_core_find_liveprop, NULL, NULL, APR_HOOK_LAST);
+ dav_hook_insert_all_liveprops(dav_core_insert_all_liveprops,
+ NULL, NULL, APR_HOOK_MIDDLE);
+
+ dav_hook_deliver_report(dav_core_deliver_report,
+ NULL, NULL, APR_HOOK_LAST);
+ dav_hook_gather_reports(dav_core_gather_reports,
+ NULL, NULL, APR_HOOK_LAST);
+
+ dav_core_register_uris(p);
+}
+
+/*---------------------------------------------------------------------------
+ *
+ * Configuration info for the module
+ */
+
+static const command_rec dav_cmds[] =
+{
+ /* per directory/location */
+ AP_INIT_TAKE1("DAV", dav_cmd_dav, NULL, ACCESS_CONF,
+ "specify the DAV provider for a directory or location"),
+
+ /* per directory/location, or per server */
+ AP_INIT_TAKE1("DAVMinTimeout", dav_cmd_davmintimeout, NULL,
+ ACCESS_CONF|RSRC_CONF,
+ "specify minimum allowed timeout"),
+
+ /* per directory/location, or per server */
+ AP_INIT_FLAG("DAVDepthInfinity", dav_cmd_davdepthinfinity, NULL,
+ ACCESS_CONF|RSRC_CONF,
+ "allow Depth infinity PROPFIND requests"),
+
+ /* per directory/location, or per server */
+ AP_INIT_FLAG("DAVLockDiscovery", dav_cmd_davlockdiscovery, NULL,
+ ACCESS_CONF|RSRC_CONF,
+ "allow lock discovery by PROPFIND requests"),
+
+ { NULL }
+};
+
+module DAV_DECLARE_DATA dav_module =
+{
+ STANDARD20_MODULE_STUFF,
+ dav_create_dir_config, /* dir config creater */
+ dav_merge_dir_config, /* dir merger --- default is to override */
+ dav_create_server_config, /* server config */
+ dav_merge_server_config, /* merge server config */
+ dav_cmds, /* command table */
+ register_hooks, /* register hooks */
+};
+
+APR_HOOK_STRUCT(
+ APR_HOOK_LINK(gather_propsets)
+ APR_HOOK_LINK(find_liveprop)
+ APR_HOOK_LINK(insert_all_liveprops)
+ APR_HOOK_LINK(deliver_report)
+ APR_HOOK_LINK(gather_reports)
+ APR_HOOK_LINK(method_precondition)
+ )
+
+APR_IMPLEMENT_EXTERNAL_HOOK_VOID(dav, DAV, gather_propsets,
+ (apr_array_header_t *uris),
+ (uris))
+
+APR_IMPLEMENT_EXTERNAL_HOOK_RUN_FIRST(dav, DAV, int, find_liveprop,
+ (const dav_resource *resource,
+ const char *ns_uri, const char *name,
+ const dav_hooks_liveprop **hooks),
+ (resource, ns_uri, name, hooks), 0)
+
+APR_IMPLEMENT_EXTERNAL_HOOK_VOID(dav, DAV, insert_all_liveprops,
+ (request_rec *r, const dav_resource *resource,
+ dav_prop_insert what, apr_text_header *phdr),
+ (r, resource, what, phdr))
+
+APR_IMPLEMENT_EXTERNAL_HOOK_RUN_FIRST(dav, DAV, int, deliver_report,
+ (request_rec *r,
+ const dav_resource *resource,
+ const apr_xml_doc *doc,
+ ap_filter_t *output, dav_error **err),
+ (r, resource, doc, output, err), DECLINED)
+
+APR_IMPLEMENT_EXTERNAL_HOOK_VOID(dav, DAV, gather_reports,
+ (request_rec *r, const dav_resource *resource,
+ apr_array_header_t *reports, dav_error **err),
+ (r, resource, reports, err))
+
+APR_IMPLEMENT_EXTERNAL_HOOK_RUN_FIRST(dav, DAV, int, method_precondition,
+ (request_rec *r,
+ dav_resource *src, const dav_resource *dest,
+ const apr_xml_doc *doc,
+ dav_error **err),
+ (r, src, dest, doc, err), DECLINED)