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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 15:01:30 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 15:01:30 +0000
commit6beeb1b708550be0d4a53b272283e17e5e35fe17 (patch)
tree1ce8673d4aaa948e5554000101f46536a1e4cc29 /modules/http/http_request.c
parentInitial commit. (diff)
downloadapache2-6beeb1b708550be0d4a53b272283e17e5e35fe17.tar.xz
apache2-6beeb1b708550be0d4a53b272283e17e5e35fe17.zip
Adding upstream version 2.4.57.upstream/2.4.57
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'modules/http/http_request.c')
-rw-r--r--modules/http/http_request.c861
1 files changed, 861 insertions, 0 deletions
diff --git a/modules/http/http_request.c b/modules/http/http_request.c
new file mode 100644
index 0000000..d59cfe2
--- /dev/null
+++ b/modules/http/http_request.c
@@ -0,0 +1,861 @@
+/* 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.
+ */
+
+/*
+ * http_request.c: functions to get and process requests
+ *
+ * Rob McCool 3/21/93
+ *
+ * Thoroughly revamped by rst for Apache. NB this file reads
+ * best from the bottom up.
+ *
+ */
+
+#include "apr_strings.h"
+#include "apr_file_io.h"
+#include "apr_fnmatch.h"
+
+#define APR_WANT_STRFUNC
+#include "apr_want.h"
+
+#include "ap_config.h"
+#include "httpd.h"
+#include "http_config.h"
+#include "http_request.h"
+#include "http_core.h"
+#include "http_protocol.h"
+#include "http_log.h"
+#include "http_main.h"
+#include "util_filter.h"
+#include "util_charset.h"
+#include "scoreboard.h"
+
+#include "mod_core.h"
+
+#if APR_HAVE_STDARG_H
+#include <stdarg.h>
+#endif
+
+APLOG_USE_MODULE(http);
+
+/*****************************************************************
+ *
+ * Mainline request processing...
+ */
+
+/* XXX A cleaner and faster way to do this might be to pass the request_rec
+ * down the filter chain as a parameter. It would need to change for
+ * subrequest vs. main request filters; perhaps the subrequest filter could
+ * make the switch.
+ */
+static void update_r_in_filters(ap_filter_t *f,
+ request_rec *from,
+ request_rec *to)
+{
+ while (f) {
+ if (f->r == from) {
+ f->r = to;
+ }
+ f = f->next;
+ }
+}
+
+static void ap_die_r(int type, request_rec *r, int recursive_error)
+{
+ char *custom_response;
+ request_rec *r_1st_err = r;
+
+ if (type == OK || type == DONE) {
+ ap_finalize_request_protocol(r);
+ return;
+ }
+
+ if (!ap_is_HTTP_VALID_RESPONSE(type)) {
+ ap_filter_t *next;
+
+ /*
+ * Check if we still have the ap_http_header_filter in place. If
+ * this is the case we should not ignore the error here because
+ * it means that we have not sent any response at all and never
+ * will. This is bad. Sent an internal server error instead.
+ */
+ next = r->output_filters;
+ while (next && (next->frec != ap_http_header_filter_handle)) {
+ next = next->next;
+ }
+
+ /*
+ * If next != NULL then we left the while above because of
+ * next->frec == ap_http_header_filter
+ */
+ if (next) {
+ if (type != AP_FILTER_ERROR) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(01579)
+ "Invalid response status %i", type);
+ }
+ else {
+ ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(02831)
+ "Response from AP_FILTER_ERROR");
+ }
+ type = HTTP_INTERNAL_SERVER_ERROR;
+ }
+ else {
+ return;
+ }
+ }
+
+ /*
+ * The following takes care of Apache redirects to custom response URLs
+ * Note that if we are already dealing with the response to some other
+ * error condition, we just report on the original error, and give up on
+ * any attempt to handle the other thing "intelligently"...
+ */
+ if (recursive_error != HTTP_OK) {
+ while (r_1st_err->prev && (r_1st_err->prev->status != HTTP_OK))
+ r_1st_err = r_1st_err->prev; /* Get back to original error */
+
+ if (r_1st_err != r) {
+ /* The recursive error was caused by an ErrorDocument specifying
+ * an internal redirect to a bad URI. ap_internal_redirect has
+ * changed the filter chains to point to the ErrorDocument's
+ * request_rec. Back out those changes so we can safely use the
+ * original failing request_rec to send the canned error message.
+ *
+ * ap_send_error_response gets rid of existing resource filters
+ * on the output side, so we can skip those.
+ */
+ update_r_in_filters(r_1st_err->proto_output_filters, r, r_1st_err);
+ update_r_in_filters(r_1st_err->input_filters, r, r_1st_err);
+ }
+
+ custom_response = NULL; /* Do NOT retry the custom thing! */
+ }
+ else {
+ int error_index = ap_index_of_response(type);
+ custom_response = ap_response_code_string(r, error_index);
+ recursive_error = 0;
+ }
+
+ r->status = type;
+
+ /*
+ * This test is done here so that none of the auth modules needs to know
+ * about proxy authentication. They treat it like normal auth, and then
+ * we tweak the status.
+ */
+ if (HTTP_UNAUTHORIZED == r->status && PROXYREQ_PROXY == r->proxyreq) {
+ r->status = HTTP_PROXY_AUTHENTICATION_REQUIRED;
+ }
+
+ /* If we don't want to keep the connection, make sure we mark that the
+ * connection is not eligible for keepalive. If we want to keep the
+ * connection, be sure that the request body (if any) has been read.
+ */
+ if (ap_status_drops_connection(r->status)) {
+ r->connection->keepalive = AP_CONN_CLOSE;
+ }
+
+ /*
+ * Two types of custom redirects --- plain text, and URLs. Plain text has
+ * a leading '"', so the URL code, here, is triggered on its absence
+ */
+
+ if (custom_response && custom_response[0] != '"') {
+
+ if (ap_is_url(custom_response)) {
+ /*
+ * The URL isn't local, so lets drop through the rest of this
+ * apache code, and continue with the usual REDIRECT handler.
+ * But note that the client will ultimately see the wrong
+ * status...
+ */
+ r->status = HTTP_MOVED_TEMPORARILY;
+ apr_table_setn(r->headers_out, "Location", custom_response);
+ }
+ else if (custom_response[0] == '/') {
+ const char *error_notes, *original_method;
+ int original_method_number;
+ r->no_local_copy = 1; /* Do NOT send HTTP_NOT_MODIFIED for
+ * error documents! */
+ /*
+ * This redirect needs to be a GET no matter what the original
+ * method was.
+ */
+ apr_table_setn(r->subprocess_env, "REQUEST_METHOD", r->method);
+
+ /*
+ * Provide a special method for modules to communicate
+ * more informative (than the plain canned) messages to us.
+ * Propagate them to ErrorDocuments via the ERROR_NOTES variable:
+ */
+ if ((error_notes = apr_table_get(r->notes,
+ "error-notes")) != NULL) {
+ apr_table_setn(r->subprocess_env, "ERROR_NOTES", error_notes);
+ }
+ original_method = r->method;
+ original_method_number = r->method_number;
+ r->method = "GET";
+ r->method_number = M_GET;
+ ap_internal_redirect(custom_response, r);
+ /* preserve ability to see %<m in the access log */
+ r->method = original_method;
+ r->method_number = original_method_number;
+ return;
+ }
+ else {
+ /*
+ * Dumb user has given us a bad url to redirect to --- fake up
+ * dying with a recursive server error...
+ */
+ recursive_error = HTTP_INTERNAL_SERVER_ERROR;
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(01580)
+ "Invalid error redirection directive: %s",
+ custom_response);
+ }
+ }
+ ap_send_error_response(r_1st_err, recursive_error);
+}
+
+AP_DECLARE(void) ap_die(int type, request_rec *r)
+{
+ ap_die_r(type, r, r->status);
+}
+
+AP_DECLARE(apr_status_t) ap_check_pipeline(conn_rec *c, apr_bucket_brigade *bb,
+ unsigned int max_blank_lines)
+{
+ apr_status_t rv = APR_EOF;
+ ap_input_mode_t mode = AP_MODE_SPECULATIVE;
+ unsigned int num_blank_lines = 0;
+ apr_size_t cr = 0;
+ char buf[2];
+
+ while (c->keepalive != AP_CONN_CLOSE && !c->aborted) {
+ apr_size_t len = cr + 1;
+
+ apr_brigade_cleanup(bb);
+ rv = ap_get_brigade(c->input_filters, bb, mode,
+ APR_NONBLOCK_READ, len);
+ if (rv != APR_SUCCESS || APR_BRIGADE_EMPTY(bb)) {
+ if (mode == AP_MODE_READBYTES) {
+ /* Unexpected error, stop with this connection */
+ ap_log_cerror(APLOG_MARK, APLOG_ERR, rv, c, APLOGNO(02967)
+ "Can't consume pipelined empty lines");
+ c->keepalive = AP_CONN_CLOSE;
+ rv = APR_EGENERAL;
+ }
+ else if (rv != APR_SUCCESS && !APR_STATUS_IS_EAGAIN(rv)) {
+ /* Pipe is dead */
+ c->keepalive = AP_CONN_CLOSE;
+ }
+ else {
+ /* Pipe is up and empty */
+ rv = APR_EAGAIN;
+ }
+ break;
+ }
+ if (!max_blank_lines) {
+ apr_off_t n = 0;
+ /* Single read asked, (non-meta-)data available? */
+ rv = apr_brigade_length(bb, 0, &n);
+ if (rv == APR_SUCCESS && n <= 0) {
+ rv = APR_EAGAIN;
+ }
+ break;
+ }
+
+ /* Lookup and consume blank lines */
+ rv = apr_brigade_flatten(bb, buf, &len);
+ if (rv != APR_SUCCESS || len != cr + 1) {
+ int log_level;
+ if (mode == AP_MODE_READBYTES) {
+ /* Unexpected error, stop with this connection */
+ c->keepalive = AP_CONN_CLOSE;
+ log_level = APLOG_ERR;
+ rv = APR_EGENERAL;
+ }
+ else {
+ /* Let outside (non-speculative/blocking) read determine
+ * where this possible failure comes from (metadata,
+ * morphed EOF socket, ...). Debug only here.
+ */
+ log_level = APLOG_DEBUG;
+ rv = APR_SUCCESS;
+ }
+ ap_log_cerror(APLOG_MARK, log_level, rv, c, APLOGNO(02968)
+ "Can't check pipelined data");
+ break;
+ }
+
+ if (mode == AP_MODE_READBYTES) {
+ /* [CR]LF consumed, try next */
+ mode = AP_MODE_SPECULATIVE;
+ cr = 0;
+ }
+ else if (cr) {
+ AP_DEBUG_ASSERT(len == 2 && buf[0] == APR_ASCII_CR);
+ if (buf[1] == APR_ASCII_LF) {
+ /* consume this CRLF */
+ mode = AP_MODE_READBYTES;
+ num_blank_lines++;
+ }
+ else {
+ /* CR(?!LF) is data */
+ break;
+ }
+ }
+ else {
+ if (buf[0] == APR_ASCII_LF) {
+ /* consume this LF */
+ mode = AP_MODE_READBYTES;
+ num_blank_lines++;
+ }
+ else if (buf[0] == APR_ASCII_CR) {
+ cr = 1;
+ }
+ else {
+ /* Not [CR]LF, some data */
+ break;
+ }
+ }
+ if (num_blank_lines > max_blank_lines) {
+ /* Enough blank lines with this connection,
+ * stop and don't recycle it.
+ */
+ c->keepalive = AP_CONN_CLOSE;
+ rv = APR_NOTFOUND;
+ break;
+ }
+ }
+
+ return rv;
+}
+
+#define RETRIEVE_BRIGADE_FROM_POOL(bb, key, pool, allocator) do { \
+ apr_pool_userdata_get((void **)&bb, key, pool); \
+ if (bb == NULL) { \
+ bb = apr_brigade_create(pool, allocator); \
+ apr_pool_userdata_setn((const void *)bb, key, NULL, pool); \
+ } \
+ else { \
+ apr_brigade_cleanup(bb); \
+ } \
+} while(0)
+
+AP_DECLARE(void) ap_process_request_after_handler(request_rec *r)
+{
+ apr_bucket_brigade *bb;
+ apr_bucket *b;
+ conn_rec *c = r->connection;
+ apr_status_t rv;
+
+ /* Send an EOR bucket through the output filter chain. When
+ * this bucket is destroyed, the request will be logged and
+ * its pool will be freed
+ */
+ RETRIEVE_BRIGADE_FROM_POOL(bb, "ap_process_request_after_handler_brigade",
+ c->pool, c->bucket_alloc);
+ b = ap_bucket_eor_create(c->bucket_alloc, r);
+ APR_BRIGADE_INSERT_HEAD(bb, b);
+
+ ap_pass_brigade(c->output_filters, bb);
+
+ /* The EOR bucket has either been handled by an output filter (eg.
+ * deleted or moved to a buffered_bb => no more in bb), or an error
+ * occured before that (eg. c->aborted => still in bb) and we ought
+ * to destroy it now. So cleanup any remaining bucket along with
+ * the orphan request (if any).
+ */
+ apr_brigade_cleanup(bb);
+
+ /* From here onward, it is no longer safe to reference r
+ * or r->pool, because r->pool may have been destroyed
+ * already by the EOR bucket's cleanup function.
+ */
+
+ /* Check pipeline consuming blank lines, they must not be interpreted as
+ * the next pipelined request, otherwise we would block on the next read
+ * without flushing data, and hence possibly delay pending response(s)
+ * until the next/real request comes in or the keepalive timeout expires.
+ */
+ rv = ap_check_pipeline(c, bb, DEFAULT_LIMIT_BLANK_LINES);
+ c->data_in_input_filters = (rv == APR_SUCCESS);
+ apr_brigade_cleanup(bb);
+
+ if (c->cs)
+ c->cs->state = (c->aborted) ? CONN_STATE_LINGER
+ : CONN_STATE_WRITE_COMPLETION;
+ AP_PROCESS_REQUEST_RETURN((uintptr_t)r, r->uri, r->status);
+ if (ap_extended_status) {
+ ap_time_process_request(c->sbh, STOP_PREQUEST);
+ }
+}
+
+void ap_process_async_request(request_rec *r)
+{
+ conn_rec *c = r->connection;
+ int access_status;
+
+ /* Give quick handlers a shot at serving the request on the fast
+ * path, bypassing all of the other Apache hooks.
+ *
+ * This hook was added to enable serving files out of a URI keyed
+ * content cache ( e.g., Mike Abbott's Quick Shortcut Cache,
+ * described here: http://oss.sgi.com/projects/apache/mod_qsc.html )
+ *
+ * It may have other uses as well, such as routing requests directly to
+ * content handlers that have the ability to grok HTTP and do their
+ * own access checking, etc (e.g. servlet engines).
+ *
+ * Use this hook with extreme care and only if you know what you are
+ * doing.
+ */
+ AP_PROCESS_REQUEST_ENTRY((uintptr_t)r, r->uri);
+ if (ap_extended_status) {
+ ap_time_process_request(r->connection->sbh, START_PREQUEST);
+ }
+
+ if (APLOGrtrace4(r)) {
+ int i;
+ const apr_array_header_t *t_h = apr_table_elts(r->headers_in);
+ const apr_table_entry_t *t_elt = (apr_table_entry_t *)t_h->elts;
+ ap_log_rerror(APLOG_MARK, APLOG_TRACE4, 0, r,
+ "Headers received from client:");
+ for (i = 0; i < t_h->nelts; i++, t_elt++) {
+ ap_log_rerror(APLOG_MARK, APLOG_TRACE4, 0, r, " %s: %s",
+ ap_escape_logitem(r->pool, t_elt->key),
+ ap_escape_logitem(r->pool, t_elt->val));
+ }
+ }
+
+#if APR_HAS_THREADS
+ apr_thread_mutex_create(&r->invoke_mtx, APR_THREAD_MUTEX_DEFAULT, r->pool);
+ apr_thread_mutex_lock(r->invoke_mtx);
+#endif
+ access_status = ap_run_quick_handler(r, 0); /* Not a look-up request */
+ if (access_status == DECLINED) {
+ access_status = ap_process_request_internal(r);
+ if (access_status == OK) {
+ access_status = ap_invoke_handler(r);
+ }
+ }
+
+ if (access_status == SUSPENDED) {
+ /* TODO: Should move these steps into a generic function, so modules
+ * working on a suspended request can also call _ENTRY again.
+ */
+ AP_PROCESS_REQUEST_RETURN((uintptr_t)r, r->uri, access_status);
+ if (ap_extended_status) {
+ ap_time_process_request(c->sbh, STOP_PREQUEST);
+ }
+ if (c->cs)
+ c->cs->state = CONN_STATE_SUSPENDED;
+#if APR_HAS_THREADS
+ apr_thread_mutex_unlock(r->invoke_mtx);
+#endif
+ return;
+ }
+#if APR_HAS_THREADS
+ apr_thread_mutex_unlock(r->invoke_mtx);
+#endif
+
+ ap_die_r(access_status, r, HTTP_OK);
+
+ ap_process_request_after_handler(r);
+}
+
+AP_DECLARE(void) ap_process_request(request_rec *r)
+{
+ apr_bucket_brigade *bb;
+ apr_bucket *b;
+ conn_rec *c = r->connection;
+ apr_status_t rv;
+
+ ap_process_async_request(r);
+
+ if (!c->data_in_input_filters) {
+ RETRIEVE_BRIGADE_FROM_POOL(bb, "ap_process_request_brigade",
+ c->pool, c->bucket_alloc);
+ b = apr_bucket_flush_create(c->bucket_alloc);
+ APR_BRIGADE_INSERT_HEAD(bb, b);
+ rv = ap_pass_brigade(c->output_filters, bb);
+ if (APR_STATUS_IS_TIMEUP(rv)) {
+ /*
+ * Notice a timeout as an error message. This might be
+ * valuable for detecting clients with broken network
+ * connections or possible DoS attacks.
+ */
+ ap_log_cerror(APLOG_MARK, APLOG_INFO, rv, c, APLOGNO(01581)
+ "flushing data to the client");
+ }
+ apr_brigade_cleanup(bb);
+ }
+ if (ap_extended_status) {
+ ap_time_process_request(c->sbh, STOP_PREQUEST);
+ }
+}
+
+static apr_table_t *rename_original_env(apr_pool_t *p, apr_table_t *t)
+{
+ const apr_array_header_t *env_arr = apr_table_elts(t);
+ const apr_table_entry_t *elts = (const apr_table_entry_t *) env_arr->elts;
+ apr_table_t *new = apr_table_make(p, env_arr->nalloc);
+ int i;
+
+ for (i = 0; i < env_arr->nelts; ++i) {
+ if (!elts[i].key)
+ continue;
+ apr_table_setn(new, apr_pstrcat(p, "REDIRECT_", elts[i].key, NULL),
+ elts[i].val);
+ }
+
+ return new;
+}
+
+static request_rec *internal_internal_redirect(const char *new_uri,
+ request_rec *r) {
+ int access_status;
+ request_rec *new;
+ const char *vary_header;
+
+ if (ap_is_recursion_limit_exceeded(r)) {
+ ap_die(HTTP_INTERNAL_SERVER_ERROR, r);
+ return NULL;
+ }
+
+ new = (request_rec *) apr_pcalloc(r->pool, sizeof(request_rec));
+
+ new->connection = r->connection;
+ new->server = r->server;
+ new->pool = r->pool;
+
+ /*
+ * A whole lot of this really ought to be shared with http_protocol.c...
+ * another missing cleanup. It's particularly inappropriate to be
+ * setting header_only, etc., here.
+ */
+
+ new->method = r->method;
+ new->method_number = r->method_number;
+ new->allowed_methods = ap_make_method_list(new->pool, 2);
+ ap_parse_uri(new, new_uri);
+ new->parsed_uri.port_str = r->parsed_uri.port_str;
+ new->parsed_uri.port = r->parsed_uri.port;
+
+ new->request_config = ap_create_request_config(r->pool);
+
+ new->per_dir_config = r->server->lookup_defaults;
+
+ new->prev = r;
+ r->next = new;
+
+ new->useragent_addr = r->useragent_addr;
+ new->useragent_ip = r->useragent_ip;
+
+ /* Must have prev and next pointers set before calling create_request
+ * hook.
+ */
+ ap_run_create_request(new);
+
+ /* Inherit the rest of the protocol info... */
+
+ new->the_request = r->the_request;
+
+ new->allowed = r->allowed;
+
+ new->status = r->status;
+ new->assbackwards = r->assbackwards;
+ new->header_only = r->header_only;
+ new->protocol = r->protocol;
+ new->proto_num = r->proto_num;
+ new->hostname = r->hostname;
+ new->request_time = r->request_time;
+ new->main = r->main;
+
+ new->headers_in = r->headers_in;
+ new->trailers_in = r->trailers_in;
+ new->headers_out = apr_table_make(r->pool, 12);
+ if (ap_is_HTTP_REDIRECT(new->status)) {
+ const char *location = apr_table_get(r->headers_out, "Location");
+ if (location)
+ apr_table_setn(new->headers_out, "Location", location);
+ }
+
+ /* A module (like mod_rewrite) can force an internal redirect
+ * to carry over the Vary header (if present).
+ */
+ if (apr_table_get(r->notes, "redirect-keeps-vary")) {
+ if((vary_header = apr_table_get(r->headers_out, "Vary"))) {
+ apr_table_setn(new->headers_out, "Vary", vary_header);
+ }
+ }
+
+ new->err_headers_out = r->err_headers_out;
+ new->trailers_out = apr_table_make(r->pool, 5);
+ new->subprocess_env = rename_original_env(r->pool, r->subprocess_env);
+ new->notes = apr_table_make(r->pool, 5);
+
+ new->htaccess = r->htaccess;
+ new->no_cache = r->no_cache;
+ new->expecting_100 = r->expecting_100;
+ new->no_local_copy = r->no_local_copy;
+ new->read_length = r->read_length; /* We can only read it once */
+ new->vlist_validator = r->vlist_validator;
+
+ new->proto_output_filters = r->proto_output_filters;
+ new->proto_input_filters = r->proto_input_filters;
+
+ new->input_filters = new->proto_input_filters;
+
+ if (new->main) {
+ ap_filter_t *f, *nextf;
+
+ /* If this is a subrequest, the filter chain may contain a
+ * mixture of filters specific to the old request (r), and
+ * some inherited from r->main. Here, inherit that filter
+ * chain, and remove all those which are specific to the old
+ * request; ensuring the subreq filter is left in place. */
+ new->output_filters = r->output_filters;
+
+ f = new->output_filters;
+ do {
+ nextf = f->next;
+
+ if (f->r == r && f->frec != ap_subreq_core_filter_handle) {
+ ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01582)
+ "dropping filter '%s' in internal redirect from %s to %s",
+ f->frec->name, r->unparsed_uri, new_uri);
+
+ /* To remove the filter, first set f->r to the *new*
+ * request_rec, so that ->output_filters on 'new' is
+ * changed (if necessary) when removing the filter. */
+ f->r = new;
+ ap_remove_output_filter(f);
+ }
+
+ f = nextf;
+
+ /* Stop at the protocol filters. If a protocol filter has
+ * been newly installed for this resource, better leave it
+ * in place, though it's probably a misconfiguration or
+ * filter bug to get into this state. */
+ } while (f && f != new->proto_output_filters);
+ }
+ else {
+ /* If this is not a subrequest, clear out all
+ * resource-specific filters. */
+ new->output_filters = new->proto_output_filters;
+ }
+
+ update_r_in_filters(new->input_filters, r, new);
+ update_r_in_filters(new->output_filters, r, new);
+
+ apr_table_setn(new->subprocess_env, "REDIRECT_STATUS",
+ apr_itoa(r->pool, r->status));
+
+ /* Begin by presuming any module can make its own path_info assumptions,
+ * until some module interjects and changes the value.
+ */
+ new->used_path_info = AP_REQ_DEFAULT_PATH_INFO;
+
+#if APR_HAS_THREADS
+ new->invoke_mtx = r->invoke_mtx;
+#endif
+
+ /*
+ * XXX: hmm. This is because mod_setenvif and mod_unique_id really need
+ * to do their thing on internal redirects as well. Perhaps this is a
+ * misnamed function.
+ */
+ if ((access_status = ap_post_read_request(new))) {
+ ap_die(access_status, new);
+ return NULL;
+ }
+
+ return new;
+}
+
+/* XXX: Is this function is so bogus and fragile that we deep-6 it? */
+AP_DECLARE(void) ap_internal_fast_redirect(request_rec *rr, request_rec *r)
+{
+ /* We need to tell POOL_DEBUG that we're guaranteeing that rr->pool
+ * will exist as long as r->pool. Otherwise we run into troubles because
+ * some values in this request will be allocated in r->pool, and others in
+ * rr->pool.
+ */
+ apr_pool_join(r->pool, rr->pool);
+ r->proxyreq = rr->proxyreq;
+ r->no_cache = (r->no_cache && rr->no_cache);
+ r->no_local_copy = (r->no_local_copy && rr->no_local_copy);
+ r->mtime = rr->mtime;
+ r->uri = rr->uri;
+ r->filename = rr->filename;
+ r->canonical_filename = rr->canonical_filename;
+ r->path_info = rr->path_info;
+ r->args = rr->args;
+ r->finfo = rr->finfo;
+ r->handler = rr->handler;
+ ap_set_content_type(r, rr->content_type);
+ r->content_encoding = rr->content_encoding;
+ r->content_languages = rr->content_languages;
+ r->per_dir_config = rr->per_dir_config;
+ /* copy output headers from subrequest, but leave negotiation headers */
+ r->notes = apr_table_overlay(r->pool, rr->notes, r->notes);
+ r->headers_out = apr_table_overlay(r->pool, rr->headers_out,
+ r->headers_out);
+ r->err_headers_out = apr_table_overlay(r->pool, rr->err_headers_out,
+ r->err_headers_out);
+ r->trailers_out = apr_table_overlay(r->pool, rr->trailers_out,
+ r->trailers_out);
+ r->subprocess_env = apr_table_overlay(r->pool, rr->subprocess_env,
+ r->subprocess_env);
+
+ r->output_filters = rr->output_filters;
+ r->input_filters = rr->input_filters;
+
+ /* If any filters pointed at the now-defunct rr, we must point them
+ * at our "new" instance of r. In particular, some of rr's structures
+ * will now be bogus (say rr->headers_out). If a filter tried to modify
+ * their f->r structure when it is pointing to rr, the real request_rec
+ * will not get updated. Fix that here.
+ */
+ update_r_in_filters(r->input_filters, rr, r);
+ update_r_in_filters(r->output_filters, rr, r);
+
+ if (r->main) {
+ ap_filter_t *next = r->output_filters;
+ while (next && (next != r->proto_output_filters)) {
+ if (next->frec == ap_subreq_core_filter_handle) {
+ break;
+ }
+ next = next->next;
+ }
+ if (!next || next == r->proto_output_filters) {
+ ap_add_output_filter_handle(ap_subreq_core_filter_handle,
+ NULL, r, r->connection);
+ }
+ }
+ else {
+ /*
+ * We need to check if we now have the SUBREQ_CORE filter in our filter
+ * chain. If this is the case we need to remove it since we are NO
+ * subrequest. But we need to keep in mind that the SUBREQ_CORE filter
+ * does not necessarily need to be the first filter in our chain. So we
+ * need to go through the chain. But we only need to walk up the chain
+ * until the proto_output_filters as the SUBREQ_CORE filter is below the
+ * protocol filters.
+ */
+ ap_filter_t *next;
+
+ next = r->output_filters;
+ while (next && (next->frec != ap_subreq_core_filter_handle)
+ && (next != r->proto_output_filters)) {
+ next = next->next;
+ }
+ if (next && (next->frec == ap_subreq_core_filter_handle)) {
+ ap_remove_output_filter(next);
+ }
+ }
+}
+
+AP_DECLARE(void) ap_internal_redirect(const char *new_uri, request_rec *r)
+{
+ int access_status;
+ request_rec *new = internal_internal_redirect(new_uri, r);
+
+ AP_INTERNAL_REDIRECT(r->uri, new_uri);
+
+ /* ap_die was already called, if an error occured */
+ if (!new) {
+ return;
+ }
+
+ access_status = ap_run_quick_handler(new, 0); /* Not a look-up request */
+ if (access_status == DECLINED) {
+ access_status = ap_process_request_internal(new);
+ if (access_status == OK) {
+ access_status = ap_invoke_handler(new);
+ }
+ }
+ ap_die(access_status, new);
+}
+
+/* This function is designed for things like actions or CGI scripts, when
+ * using AddHandler, and you want to preserve the content type across
+ * an internal redirect.
+ */
+AP_DECLARE(void) ap_internal_redirect_handler(const char *new_uri, request_rec *r)
+{
+ int access_status;
+ request_rec *new = internal_internal_redirect(new_uri, r);
+
+ /* ap_die was already called, if an error occured */
+ if (!new) {
+ return;
+ }
+
+ if (r->handler)
+ ap_set_content_type(new, r->content_type);
+ access_status = ap_process_request_internal(new);
+ if (access_status == OK) {
+ access_status = ap_invoke_handler(new);
+ }
+ ap_die(access_status, new);
+}
+
+AP_DECLARE(void) ap_allow_methods(request_rec *r, int reset, ...)
+{
+ const char *method;
+ va_list methods;
+
+ /*
+ * Get rid of any current settings if requested; not just the
+ * well-known methods but any extensions as well.
+ */
+ if (reset) {
+ ap_clear_method_list(r->allowed_methods);
+ }
+
+ va_start(methods, reset);
+ while ((method = va_arg(methods, const char *)) != NULL) {
+ ap_method_list_add(r->allowed_methods, method);
+ }
+ va_end(methods);
+}
+
+AP_DECLARE(void) ap_allow_standard_methods(request_rec *r, int reset, ...)
+{
+ int method;
+ va_list methods;
+ apr_int64_t mask;
+
+ /*
+ * Get rid of any current settings if requested; not just the
+ * well-known methods but any extensions as well.
+ */
+ if (reset) {
+ ap_clear_method_list(r->allowed_methods);
+ }
+
+ mask = 0;
+ va_start(methods, reset);
+ while ((method = va_arg(methods, int)) != -1) {
+ mask |= (AP_METHOD_BIT << method);
+ }
+ va_end(methods);
+
+ r->allowed_methods->method_mask |= mask;
+}