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-rw-r--r--modules/cache/mod_cache_disk.c1585
1 files changed, 1585 insertions, 0 deletions
diff --git a/modules/cache/mod_cache_disk.c b/modules/cache/mod_cache_disk.c
new file mode 100644
index 0000000..8d17a19
--- /dev/null
+++ b/modules/cache/mod_cache_disk.c
@@ -0,0 +1,1585 @@
+/* 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.
+ */
+
+#include "apr_lib.h"
+#include "apr_file_io.h"
+#include "apr_strings.h"
+#include "mod_cache.h"
+#include "mod_cache_disk.h"
+#include "http_config.h"
+#include "http_log.h"
+#include "http_core.h"
+#include "ap_provider.h"
+#include "util_filter.h"
+#include "util_script.h"
+#include "util_charset.h"
+
+/*
+ * mod_cache_disk: Disk Based HTTP 1.1 Cache.
+ *
+ * Flow to Find the .data file:
+ * Incoming client requests URI /foo/bar/baz
+ * Generate <hash> off of /foo/bar/baz
+ * Open <hash>.header
+ * Read in <hash>.header file (may contain Format #1 or Format #2)
+ * If format #1 (Contains a list of Vary Headers):
+ * Use each header name (from .header) with our request values (headers_in) to
+ * regenerate <hash> using HeaderName+HeaderValue+.../foo/bar/baz
+ * re-read in <hash>.header (must be format #2)
+ * read in <hash>.data
+ *
+ * Format #1:
+ * apr_uint32_t format;
+ * apr_time_t expire;
+ * apr_array_t vary_headers (delimited by CRLF)
+ *
+ * Format #2:
+ * disk_cache_info_t (first sizeof(apr_uint32_t) bytes is the format)
+ * entity name (dobj->name) [length is in disk_cache_info_t->name_len]
+ * r->headers_out (delimited by CRLF)
+ * CRLF
+ * r->headers_in (delimited by CRLF)
+ * CRLF
+ */
+
+module AP_MODULE_DECLARE_DATA cache_disk_module;
+
+/* Forward declarations */
+static int remove_entity(cache_handle_t *h);
+static apr_status_t store_headers(cache_handle_t *h, request_rec *r, cache_info *i);
+static apr_status_t store_body(cache_handle_t *h, request_rec *r, apr_bucket_brigade *in,
+ apr_bucket_brigade *out);
+static apr_status_t recall_headers(cache_handle_t *h, request_rec *r);
+static apr_status_t recall_body(cache_handle_t *h, apr_pool_t *p, apr_bucket_brigade *bb);
+static apr_status_t read_array(request_rec *r, apr_array_header_t* arr,
+ apr_file_t *file);
+
+/*
+ * Local static functions
+ */
+
+static char *header_file(apr_pool_t *p, disk_cache_conf *conf,
+ disk_cache_object_t *dobj, const char *name)
+{
+ if (!dobj->hashfile) {
+ dobj->hashfile = ap_cache_generate_name(p, conf->dirlevels,
+ conf->dirlength, name);
+ }
+
+ if (dobj->prefix) {
+ return apr_pstrcat(p, dobj->prefix, CACHE_VDIR_SUFFIX "/",
+ dobj->hashfile, CACHE_HEADER_SUFFIX, NULL);
+ }
+ else {
+ return apr_pstrcat(p, conf->cache_root, "/", dobj->hashfile,
+ CACHE_HEADER_SUFFIX, NULL);
+ }
+}
+
+static char *data_file(apr_pool_t *p, disk_cache_conf *conf,
+ disk_cache_object_t *dobj, const char *name)
+{
+ if (!dobj->hashfile) {
+ dobj->hashfile = ap_cache_generate_name(p, conf->dirlevels,
+ conf->dirlength, name);
+ }
+
+ if (dobj->prefix) {
+ return apr_pstrcat(p, dobj->prefix, CACHE_VDIR_SUFFIX "/",
+ dobj->hashfile, CACHE_DATA_SUFFIX, NULL);
+ }
+ else {
+ return apr_pstrcat(p, conf->cache_root, "/", dobj->hashfile,
+ CACHE_DATA_SUFFIX, NULL);
+ }
+}
+
+static apr_status_t mkdir_structure(disk_cache_conf *conf, const char *file, apr_pool_t *pool)
+{
+ apr_status_t rv;
+ char *p;
+
+ for (p = (char*)file + conf->cache_root_len + 1;;) {
+ p = strchr(p, '/');
+ if (!p)
+ break;
+ *p = '\0';
+
+ rv = apr_dir_make(file,
+ APR_UREAD|APR_UWRITE|APR_UEXECUTE, pool);
+ if (rv != APR_SUCCESS && !APR_STATUS_IS_EEXIST(rv)) {
+ return rv;
+ }
+ *p = '/';
+ ++p;
+ }
+ return APR_SUCCESS;
+}
+
+/* htcacheclean may remove directories underneath us.
+ * So, we'll try renaming three times at a cost of 0.002 seconds.
+ */
+static apr_status_t safe_file_rename(disk_cache_conf *conf,
+ const char *src, const char *dest,
+ apr_pool_t *pool)
+{
+ apr_status_t rv;
+
+ rv = apr_file_rename(src, dest, pool);
+
+ if (rv != APR_SUCCESS) {
+ int i;
+
+ for (i = 0; i < 2 && rv != APR_SUCCESS; i++) {
+ /* 1000 micro-seconds aka 0.001 seconds. */
+ apr_sleep(1000);
+
+ rv = mkdir_structure(conf, dest, pool);
+ if (rv != APR_SUCCESS)
+ continue;
+
+ rv = apr_file_rename(src, dest, pool);
+ }
+ }
+
+ return rv;
+}
+
+static apr_status_t file_cache_el_final(disk_cache_conf *conf, disk_cache_file_t *file,
+ request_rec *r)
+{
+ apr_status_t rv = APR_SUCCESS;
+
+ /* This assumes that the tempfiles are on the same file system
+ * as the cache_root. If not, then we need a file copy/move
+ * rather than a rename.
+ */
+
+ /* move the file over */
+ if (file->tempfd) {
+
+ rv = safe_file_rename(conf, file->tempfile, file->file, file->pool);
+ if (rv != APR_SUCCESS) {
+ ap_log_rerror(APLOG_MARK, APLOG_WARNING, rv, r, APLOGNO(00699)
+ "rename tempfile to file failed:"
+ " %s -> %s", file->tempfile, file->file);
+ apr_file_remove(file->tempfile, file->pool);
+ }
+
+ file->tempfd = NULL;
+ }
+
+ return rv;
+}
+
+static apr_status_t file_cache_temp_cleanup(void *dummy)
+{
+ disk_cache_file_t *file = (disk_cache_file_t *)dummy;
+
+ /* clean up the temporary file */
+ if (file->tempfd) {
+ apr_file_remove(file->tempfile, file->pool);
+ file->tempfd = NULL;
+ }
+ file->tempfile = NULL;
+ file->pool = NULL;
+
+ return APR_SUCCESS;
+}
+
+static apr_status_t file_cache_create(disk_cache_conf *conf, disk_cache_file_t *file,
+ apr_pool_t *pool)
+{
+ file->pool = pool;
+ file->tempfile = apr_pstrcat(pool, conf->cache_root, AP_TEMPFILE, NULL);
+
+ apr_pool_cleanup_register(pool, file, file_cache_temp_cleanup, apr_pool_cleanup_null);
+
+ return APR_SUCCESS;
+}
+
+/* These two functions get and put state information into the data
+ * file for an ap_cache_el, this state information will be read
+ * and written transparent to clients of this module
+ */
+static int file_cache_recall_mydata(apr_file_t *fd, cache_info *info,
+ disk_cache_object_t *dobj, request_rec *r)
+{
+ apr_status_t rv;
+ char *urlbuff;
+ apr_size_t len;
+
+ /* read the data from the cache file */
+ len = sizeof(disk_cache_info_t);
+ rv = apr_file_read_full(fd, &dobj->disk_info, len, &len);
+ if (rv != APR_SUCCESS) {
+ return rv;
+ }
+
+ /* Store it away so we can get it later. */
+ info->status = dobj->disk_info.status;
+ info->date = dobj->disk_info.date;
+ info->expire = dobj->disk_info.expire;
+ info->request_time = dobj->disk_info.request_time;
+ info->response_time = dobj->disk_info.response_time;
+
+ memcpy(&info->control, &dobj->disk_info.control, sizeof(cache_control_t));
+
+ /* Note that we could optimize this by conditionally doing the palloc
+ * depending upon the size. */
+ urlbuff = apr_palloc(r->pool, dobj->disk_info.name_len + 1);
+ len = dobj->disk_info.name_len;
+ rv = apr_file_read_full(fd, urlbuff, len, &len);
+ if (rv != APR_SUCCESS) {
+ return rv;
+ }
+ urlbuff[dobj->disk_info.name_len] = '\0';
+
+ /* check that we have the same URL */
+ /* Would strncmp be correct? */
+ if (strcmp(urlbuff, dobj->name) != 0) {
+ return APR_EGENERAL;
+ }
+
+ return APR_SUCCESS;
+}
+
+static const char* regen_key(apr_pool_t *p, apr_table_t *headers,
+ apr_array_header_t *varray, const char *oldkey)
+{
+ struct iovec *iov;
+ int i, k;
+ int nvec;
+ const char *header;
+ const char **elts;
+
+ nvec = (varray->nelts * 2) + 1;
+ iov = apr_palloc(p, sizeof(struct iovec) * nvec);
+ elts = (const char **) varray->elts;
+
+ /* TODO:
+ * - Handle multiple-value headers better. (sort them?)
+ * - Handle Case in-sensitive Values better.
+ * This isn't the end of the world, since it just lowers the cache
+ * hit rate, but it would be nice to fix.
+ *
+ * The majority are case insenstive if they are values (encoding etc).
+ * Most of rfc2616 is case insensitive on header contents.
+ *
+ * So the better solution may be to identify headers which should be
+ * treated case-sensitive?
+ * HTTP URI's (3.2.3) [host and scheme are insensitive]
+ * HTTP method (5.1.1)
+ * HTTP-date values (3.3.1)
+ * 3.7 Media Types [excerpt]
+ * The type, subtype, and parameter attribute names are case-
+ * insensitive. Parameter values might or might not be case-sensitive,
+ * depending on the semantics of the parameter name.
+ * 4.20 Except [excerpt]
+ * Comparison of expectation values is case-insensitive for unquoted
+ * tokens (including the 100-continue token), and is case-sensitive for
+ * quoted-string expectation-extensions.
+ */
+
+ for (i=0, k=0; i < varray->nelts; i++) {
+ header = apr_table_get(headers, elts[i]);
+ if (!header) {
+ header = "";
+ }
+ iov[k].iov_base = (char*) elts[i];
+ iov[k].iov_len = strlen(elts[i]);
+ k++;
+ iov[k].iov_base = (char*) header;
+ iov[k].iov_len = strlen(header);
+ k++;
+ }
+ iov[k].iov_base = (char*) oldkey;
+ iov[k].iov_len = strlen(oldkey);
+ k++;
+
+ return apr_pstrcatv(p, iov, k, NULL);
+}
+
+static int array_alphasort(const void *fn1, const void *fn2)
+{
+ return strcmp(*(char**)fn1, *(char**)fn2);
+}
+
+static void tokens_to_array(apr_pool_t *p, const char *data,
+ apr_array_header_t *arr)
+{
+ char *token;
+
+ while ((token = ap_get_list_item(p, &data)) != NULL) {
+ *((const char **) apr_array_push(arr)) = token;
+ }
+
+ /* Sort it so that "Vary: A, B" and "Vary: B, A" are stored the same. */
+ qsort((void *) arr->elts, arr->nelts,
+ sizeof(char *), array_alphasort);
+}
+
+/*
+ * Hook and mod_cache callback functions
+ */
+static int create_entity(cache_handle_t *h, request_rec *r, const char *key, apr_off_t len,
+ apr_bucket_brigade *bb)
+{
+ disk_cache_dir_conf *dconf = ap_get_module_config(r->per_dir_config, &cache_disk_module);
+ disk_cache_conf *conf = ap_get_module_config(r->server->module_config,
+ &cache_disk_module);
+ cache_object_t *obj;
+ disk_cache_object_t *dobj;
+ apr_pool_t *pool;
+
+ if (conf->cache_root == NULL) {
+ return DECLINED;
+ }
+
+ /* we don't support caching of range requests (yet) */
+ if (r->status == HTTP_PARTIAL_CONTENT) {
+ ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(00700)
+ "URL %s partial content response not cached",
+ key);
+ return DECLINED;
+ }
+
+ /* Note, len is -1 if unknown so don't trust it too hard */
+ if (len > dconf->maxfs) {
+ ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(00701)
+ "URL %s failed the size check "
+ "(%" APR_OFF_T_FMT " > %" APR_OFF_T_FMT ")",
+ key, len, dconf->maxfs);
+ return DECLINED;
+ }
+ if (len >= 0 && len < dconf->minfs) {
+ ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(00702)
+ "URL %s failed the size check "
+ "(%" APR_OFF_T_FMT " < %" APR_OFF_T_FMT ")",
+ key, len, dconf->minfs);
+ return DECLINED;
+ }
+
+ /* Allocate and initialize cache_object_t and disk_cache_object_t */
+ h->cache_obj = obj = apr_pcalloc(r->pool, sizeof(*obj));
+ obj->vobj = dobj = apr_pcalloc(r->pool, sizeof(*dobj));
+
+ obj->key = apr_pstrdup(r->pool, key);
+
+ dobj->name = obj->key;
+ dobj->prefix = NULL;
+ /* Save the cache root */
+ dobj->root = apr_pstrmemdup(r->pool, conf->cache_root, conf->cache_root_len);
+ dobj->root_len = conf->cache_root_len;
+
+ apr_pool_create(&pool, r->pool);
+ apr_pool_tag(pool, "mod_cache (create_entity)");
+
+ file_cache_create(conf, &dobj->hdrs, pool);
+ file_cache_create(conf, &dobj->vary, pool);
+ file_cache_create(conf, &dobj->data, pool);
+
+ dobj->data.file = data_file(r->pool, conf, dobj, key);
+ dobj->hdrs.file = header_file(r->pool, conf, dobj, key);
+ dobj->vary.file = header_file(r->pool, conf, dobj, key);
+
+ dobj->disk_info.header_only = r->header_only;
+
+ return OK;
+}
+
+static int open_entity(cache_handle_t *h, request_rec *r, const char *key)
+{
+ apr_uint32_t format;
+ apr_size_t len;
+ const char *nkey;
+ apr_status_t rc;
+ static int error_logged = 0;
+ disk_cache_conf *conf = ap_get_module_config(r->server->module_config,
+ &cache_disk_module);
+#ifdef APR_SENDFILE_ENABLED
+ core_dir_config *coreconf = ap_get_core_module_config(r->per_dir_config);
+#endif
+ apr_finfo_t finfo;
+ cache_object_t *obj;
+ cache_info *info;
+ disk_cache_object_t *dobj;
+ int flags;
+ apr_pool_t *pool;
+
+ h->cache_obj = NULL;
+
+ /* Look up entity keyed to 'url' */
+ if (conf->cache_root == NULL) {
+ if (!error_logged) {
+ error_logged = 1;
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00703)
+ "Cannot cache files to disk without a CacheRoot specified.");
+ }
+ return DECLINED;
+ }
+
+ /* Create and init the cache object */
+ obj = apr_pcalloc(r->pool, sizeof(cache_object_t));
+ dobj = apr_pcalloc(r->pool, sizeof(disk_cache_object_t));
+
+ info = &(obj->info);
+
+ /* Open the headers file */
+ dobj->prefix = NULL;
+
+ /* Save the cache root */
+ dobj->root = apr_pstrmemdup(r->pool, conf->cache_root, conf->cache_root_len);
+ dobj->root_len = conf->cache_root_len;
+
+ dobj->vary.file = header_file(r->pool, conf, dobj, key);
+ flags = APR_READ|APR_BINARY|APR_BUFFERED;
+ rc = apr_file_open(&dobj->vary.fd, dobj->vary.file, flags, 0, r->pool);
+ if (rc != APR_SUCCESS) {
+ return DECLINED;
+ }
+
+ /* read the format from the cache file */
+ len = sizeof(format);
+ apr_file_read_full(dobj->vary.fd, &format, len, &len);
+
+ if (format == VARY_FORMAT_VERSION) {
+ apr_array_header_t* varray;
+ apr_time_t expire;
+
+ len = sizeof(expire);
+ apr_file_read_full(dobj->vary.fd, &expire, len, &len);
+
+ varray = apr_array_make(r->pool, 5, sizeof(char*));
+ rc = read_array(r, varray, dobj->vary.fd);
+ if (rc != APR_SUCCESS) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, rc, r, APLOGNO(00704)
+ "Cannot parse vary header file: %s",
+ dobj->vary.file);
+ apr_file_close(dobj->vary.fd);
+ return DECLINED;
+ }
+ apr_file_close(dobj->vary.fd);
+
+ nkey = regen_key(r->pool, r->headers_in, varray, key);
+
+ dobj->hashfile = NULL;
+ dobj->prefix = dobj->vary.file;
+ dobj->hdrs.file = header_file(r->pool, conf, dobj, nkey);
+
+ flags = APR_READ|APR_BINARY|APR_BUFFERED;
+ rc = apr_file_open(&dobj->hdrs.fd, dobj->hdrs.file, flags, 0, r->pool);
+ if (rc != APR_SUCCESS) {
+ return DECLINED;
+ }
+ }
+ else if (format != DISK_FORMAT_VERSION) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00705)
+ "File '%s' has a version mismatch. File had version: %d.",
+ dobj->vary.file, format);
+ apr_file_close(dobj->vary.fd);
+ return DECLINED;
+ }
+ else {
+ apr_off_t offset = 0;
+
+ /* oops, not vary as it turns out */
+ dobj->hdrs.fd = dobj->vary.fd;
+ dobj->vary.fd = NULL;
+ dobj->hdrs.file = dobj->vary.file;
+
+ /* This wasn't a Vary Format file, so we must seek to the
+ * start of the file again, so that later reads work.
+ */
+ apr_file_seek(dobj->hdrs.fd, APR_SET, &offset);
+ nkey = key;
+ }
+
+ obj->key = nkey;
+ dobj->key = nkey;
+ dobj->name = key;
+
+ apr_pool_create(&pool, r->pool);
+ apr_pool_tag(pool, "mod_cache (open_entity)");
+
+ file_cache_create(conf, &dobj->hdrs, pool);
+ file_cache_create(conf, &dobj->vary, pool);
+ file_cache_create(conf, &dobj->data, pool);
+
+ dobj->data.file = data_file(r->pool, conf, dobj, nkey);
+
+ /* Read the bytes to setup the cache_info fields */
+ rc = file_cache_recall_mydata(dobj->hdrs.fd, info, dobj, r);
+ if (rc != APR_SUCCESS) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, rc, r, APLOGNO(00706)
+ "Cannot read header file %s", dobj->hdrs.file);
+ apr_file_close(dobj->hdrs.fd);
+ return DECLINED;
+ }
+
+
+ /* Is this a cached HEAD request? */
+ if (dobj->disk_info.header_only && !r->header_only) {
+ ap_log_rerror(APLOG_MARK, APLOG_DEBUG, APR_SUCCESS, r, APLOGNO(00707)
+ "HEAD request cached, non-HEAD requested, ignoring: %s",
+ dobj->hdrs.file);
+ apr_file_close(dobj->hdrs.fd);
+ return DECLINED;
+ }
+
+ /* Open the data file */
+ if (dobj->disk_info.has_body) {
+ flags = APR_READ | APR_BINARY;
+#ifdef APR_SENDFILE_ENABLED
+ /* When we are in the quick handler we don't have the per-directory
+ * configuration, so this check only takes the global setting of
+ * the EnableSendFile directive into account.
+ */
+ flags |= AP_SENDFILE_ENABLED(coreconf->enable_sendfile);
+#endif
+ rc = apr_file_open(&dobj->data.fd, dobj->data.file, flags, 0, r->pool);
+ if (rc != APR_SUCCESS) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, rc, r, APLOGNO(00708)
+ "Cannot open data file %s", dobj->data.file);
+ apr_file_close(dobj->hdrs.fd);
+ return DECLINED;
+ }
+
+ rc = apr_file_info_get(&finfo, APR_FINFO_SIZE | APR_FINFO_IDENT,
+ dobj->data.fd);
+ if (rc == APR_SUCCESS) {
+ dobj->file_size = finfo.size;
+ }
+
+ /* Atomic check - does the body file belong to the header file? */
+ if (dobj->disk_info.inode == finfo.inode &&
+ dobj->disk_info.device == finfo.device) {
+
+ /* Initialize the cache_handle callback functions */
+ ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(00709)
+ "Recalled cached URL info header %s", dobj->name);
+
+ /* make the configuration stick */
+ h->cache_obj = obj;
+ obj->vobj = dobj;
+
+ return OK;
+ }
+
+ }
+ else {
+
+ /* make the configuration stick */
+ h->cache_obj = obj;
+ obj->vobj = dobj;
+
+ return OK;
+ }
+
+ /* Oh dear, no luck matching header to the body */
+ ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(00710)
+ "Cached URL info header '%s' didn't match body, ignoring this entry",
+ dobj->name);
+
+ apr_file_close(dobj->hdrs.fd);
+ return DECLINED;
+}
+
+static void close_disk_cache_fd(disk_cache_file_t *file)
+{
+ if (file->fd != NULL) {
+ apr_file_close(file->fd);
+ file->fd = NULL;
+ }
+ if (file->tempfd != NULL) {
+ apr_file_close(file->tempfd);
+ file->tempfd = NULL;
+ }
+}
+
+static int remove_entity(cache_handle_t *h)
+{
+ disk_cache_object_t *dobj = (disk_cache_object_t *) h->cache_obj->vobj;
+
+ close_disk_cache_fd(&(dobj->hdrs));
+ close_disk_cache_fd(&(dobj->vary));
+ close_disk_cache_fd(&(dobj->data));
+
+ /* Null out the cache object pointer so next time we start from scratch */
+ h->cache_obj = NULL;
+ return OK;
+}
+
+static int remove_url(cache_handle_t *h, request_rec *r)
+{
+ apr_status_t rc;
+ disk_cache_object_t *dobj;
+
+ /* Get disk cache object from cache handle */
+ dobj = (disk_cache_object_t *) h->cache_obj->vobj;
+ if (!dobj) {
+ return DECLINED;
+ }
+
+ /* Delete headers file */
+ if (dobj->hdrs.file) {
+ ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(00711)
+ "Deleting %s from cache.", dobj->hdrs.file);
+
+ rc = apr_file_remove(dobj->hdrs.file, r->pool);
+ if ((rc != APR_SUCCESS) && !APR_STATUS_IS_ENOENT(rc)) {
+ /* Will only result in an output if httpd is started with -e debug.
+ * For reason see log_error_core for the case s == NULL.
+ */
+ ap_log_rerror(APLOG_MARK, APLOG_DEBUG, rc, r, APLOGNO(00712)
+ "Failed to delete headers file %s from cache.",
+ dobj->hdrs.file);
+ return DECLINED;
+ }
+ }
+
+ /* Delete data file */
+ if (dobj->data.file) {
+ ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(00713)
+ "Deleting %s from cache.", dobj->data.file);
+
+ rc = apr_file_remove(dobj->data.file, r->pool);
+ if ((rc != APR_SUCCESS) && !APR_STATUS_IS_ENOENT(rc)) {
+ /* Will only result in an output if httpd is started with -e debug.
+ * For reason see log_error_core for the case s == NULL.
+ */
+ ap_log_rerror(APLOG_MARK, APLOG_DEBUG, rc, r, APLOGNO(00714)
+ "Failed to delete data file %s from cache.",
+ dobj->data.file);
+ return DECLINED;
+ }
+ }
+
+ /* now delete directories as far as possible up to our cache root */
+ if (dobj->root) {
+ const char *str_to_copy;
+
+ str_to_copy = dobj->hdrs.file ? dobj->hdrs.file : dobj->data.file;
+ if (str_to_copy) {
+ char *dir, *slash, *q;
+
+ dir = apr_pstrdup(r->pool, str_to_copy);
+
+ /* remove filename */
+ slash = strrchr(dir, '/');
+ *slash = '\0';
+
+ /*
+ * now walk our way back to the cache root, delete everything
+ * in the way as far as possible
+ *
+ * Note: due to the way we constructed the file names in
+ * header_file and data_file, we are guaranteed that the
+ * cache_root is suffixed by at least one '/' which will be
+ * turned into a terminating null by this loop. Therefore,
+ * we won't either delete or go above our cache root.
+ */
+ for (q = dir + dobj->root_len; *q ; ) {
+ ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(00715)
+ "Deleting directory %s from cache", dir);
+
+ rc = apr_dir_remove(dir, r->pool);
+ if (rc != APR_SUCCESS && !APR_STATUS_IS_ENOENT(rc)) {
+ break;
+ }
+ slash = strrchr(q, '/');
+ *slash = '\0';
+ }
+ }
+ }
+
+ return OK;
+}
+
+static apr_status_t read_array(request_rec *r, apr_array_header_t* arr,
+ apr_file_t *file)
+{
+ char w[MAX_STRING_LEN];
+ apr_size_t p;
+ apr_status_t rv;
+
+ while (1) {
+ rv = apr_file_gets(w, MAX_STRING_LEN - 1, file);
+ if (rv != APR_SUCCESS) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00716)
+ "Premature end of vary array.");
+ return rv;
+ }
+
+ p = strlen(w);
+ if (p > 0 && w[p - 1] == '\n') {
+ if (p > 1 && w[p - 2] == CR) {
+ w[p - 2] = '\0';
+ }
+ else {
+ w[p - 1] = '\0';
+ }
+ }
+
+ /* If we've finished reading the array, break out of the loop. */
+ if (w[0] == '\0') {
+ break;
+ }
+
+ *((const char **) apr_array_push(arr)) = apr_pstrdup(r->pool, w);
+ }
+
+ return APR_SUCCESS;
+}
+
+static apr_status_t store_array(apr_file_t *fd, apr_array_header_t* arr)
+{
+ int i;
+ apr_status_t rv;
+ struct iovec iov[2];
+ apr_size_t amt;
+ const char **elts;
+
+ elts = (const char **) arr->elts;
+
+ for (i = 0; i < arr->nelts; i++) {
+ iov[0].iov_base = (char*) elts[i];
+ iov[0].iov_len = strlen(elts[i]);
+ iov[1].iov_base = CRLF;
+ iov[1].iov_len = sizeof(CRLF) - 1;
+
+ rv = apr_file_writev_full(fd, (const struct iovec *) &iov, 2, &amt);
+ if (rv != APR_SUCCESS) {
+ return rv;
+ }
+ }
+
+ iov[0].iov_base = CRLF;
+ iov[0].iov_len = sizeof(CRLF) - 1;
+
+ return apr_file_writev_full(fd, (const struct iovec *) &iov, 1, &amt);
+}
+
+static apr_status_t read_table(cache_handle_t *handle, request_rec *r,
+ apr_table_t *table, apr_file_t *file)
+{
+ char w[MAX_STRING_LEN];
+ char *l;
+ apr_size_t p;
+ apr_status_t rv;
+
+ while (1) {
+
+ /* ### What about APR_EOF? */
+ rv = apr_file_gets(w, MAX_STRING_LEN - 1, file);
+ if (rv != APR_SUCCESS) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(00717)
+ "Premature end of cache headers.");
+ return rv;
+ }
+
+ /* Delete terminal (CR?)LF */
+
+ p = strlen(w);
+ /* Indeed, the host's '\n':
+ '\012' for UNIX; '\015' for MacOS; '\025' for OS/390
+ -- whatever the script generates.
+ */
+ if (p > 0 && w[p - 1] == '\n') {
+ if (p > 1 && w[p - 2] == CR) {
+ w[p - 2] = '\0';
+ }
+ else {
+ w[p - 1] = '\0';
+ }
+ }
+
+ /* If we've finished reading the headers, break out of the loop. */
+ if (w[0] == '\0') {
+ break;
+ }
+
+#if APR_CHARSET_EBCDIC
+ /* Chances are that we received an ASCII header text instead of
+ * the expected EBCDIC header lines. Try to auto-detect:
+ */
+ if (!(l = strchr(w, ':'))) {
+ int maybeASCII = 0, maybeEBCDIC = 0;
+ unsigned char *cp, native;
+ apr_size_t inbytes_left, outbytes_left;
+
+ for (cp = w; *cp != '\0'; ++cp) {
+ native = apr_xlate_conv_byte(ap_hdrs_from_ascii, *cp);
+ if (apr_isprint(*cp) && !apr_isprint(native))
+ ++maybeEBCDIC;
+ if (!apr_isprint(*cp) && apr_isprint(native))
+ ++maybeASCII;
+ }
+ if (maybeASCII > maybeEBCDIC) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00718)
+ "CGI Interface Error: Script headers apparently ASCII: (CGI = %s)",
+ r->filename);
+ inbytes_left = outbytes_left = cp - w;
+ apr_xlate_conv_buffer(ap_hdrs_from_ascii,
+ w, &inbytes_left, w, &outbytes_left);
+ }
+ }
+#endif /*APR_CHARSET_EBCDIC*/
+
+ /* if we see a bogus header don't ignore it. Shout and scream */
+ if (!(l = strchr(w, ':'))) {
+ return APR_EGENERAL;
+ }
+
+ *l++ = '\0';
+ while (apr_isspace(*l)) {
+ ++l;
+ }
+
+ apr_table_add(table, w, l);
+ }
+
+ return APR_SUCCESS;
+}
+
+/*
+ * Reads headers from a buffer and returns an array of headers.
+ * Returns NULL on file error
+ * This routine tries to deal with too long lines and continuation lines.
+ * @@@: XXX: FIXME: currently the headers are passed thru un-merged.
+ * Is that okay, or should they be collapsed where possible?
+ */
+static apr_status_t recall_headers(cache_handle_t *h, request_rec *r)
+{
+ disk_cache_object_t *dobj = (disk_cache_object_t *) h->cache_obj->vobj;
+ apr_status_t rv;
+
+ /* This case should not happen... */
+ if (!dobj->hdrs.fd) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00719)
+ "recalling headers; but no header fd for %s", dobj->name);
+ return APR_NOTFOUND;
+ }
+
+ h->req_hdrs = apr_table_make(r->pool, 20);
+ h->resp_hdrs = apr_table_make(r->pool, 20);
+
+ /* Call routine to read the header lines/status line */
+ rv = read_table(h, r, h->resp_hdrs, dobj->hdrs.fd);
+ if (rv != APR_SUCCESS) {
+ ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(02987)
+ "Error reading response headers from %s for %s",
+ dobj->hdrs.file, dobj->name);
+ }
+ rv = read_table(h, r, h->req_hdrs, dobj->hdrs.fd);
+ if (rv != APR_SUCCESS) {
+ ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(02988)
+ "Error reading request headers from %s for %s",
+ dobj->hdrs.file, dobj->name);
+ }
+
+ apr_file_close(dobj->hdrs.fd);
+
+ ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(00720)
+ "Recalled headers for URL %s", dobj->name);
+ return APR_SUCCESS;
+}
+
+static apr_status_t recall_body(cache_handle_t *h, apr_pool_t *p, apr_bucket_brigade *bb)
+{
+ disk_cache_object_t *dobj = (disk_cache_object_t*) h->cache_obj->vobj;
+
+ if (dobj->data.fd) {
+ apr_brigade_insert_file(bb, dobj->data.fd, 0, dobj->file_size, p);
+ }
+
+ return APR_SUCCESS;
+}
+
+static apr_status_t store_table(apr_file_t *fd, apr_table_t *table)
+{
+ int i;
+ apr_status_t rv;
+ struct iovec iov[4];
+ apr_size_t amt;
+ apr_table_entry_t *elts;
+
+ elts = (apr_table_entry_t *) apr_table_elts(table)->elts;
+ for (i = 0; i < apr_table_elts(table)->nelts; ++i) {
+ if (elts[i].key != NULL) {
+ iov[0].iov_base = elts[i].key;
+ iov[0].iov_len = strlen(elts[i].key);
+ iov[1].iov_base = ": ";
+ iov[1].iov_len = sizeof(": ") - 1;
+ iov[2].iov_base = elts[i].val;
+ iov[2].iov_len = strlen(elts[i].val);
+ iov[3].iov_base = CRLF;
+ iov[3].iov_len = sizeof(CRLF) - 1;
+
+ rv = apr_file_writev_full(fd, (const struct iovec *) &iov, 4, &amt);
+ if (rv != APR_SUCCESS) {
+ return rv;
+ }
+ }
+ }
+ iov[0].iov_base = CRLF;
+ iov[0].iov_len = sizeof(CRLF) - 1;
+ rv = apr_file_writev_full(fd, (const struct iovec *) &iov, 1, &amt);
+ return rv;
+}
+
+static apr_status_t store_headers(cache_handle_t *h, request_rec *r, cache_info *info)
+{
+ disk_cache_object_t *dobj = (disk_cache_object_t*) h->cache_obj->vobj;
+
+ memcpy(&h->cache_obj->info, info, sizeof(cache_info));
+
+ if (r->headers_out) {
+ dobj->headers_out = ap_cache_cacheable_headers_out(r);
+ }
+
+ if (r->headers_in) {
+ dobj->headers_in = ap_cache_cacheable_headers_in(r);
+ }
+
+ if (r->header_only && r->status != HTTP_NOT_MODIFIED) {
+ dobj->disk_info.header_only = 1;
+ }
+
+ return APR_SUCCESS;
+}
+
+static apr_status_t write_headers(cache_handle_t *h, request_rec *r)
+{
+ disk_cache_conf *conf = ap_get_module_config(r->server->module_config,
+ &cache_disk_module);
+ apr_status_t rv;
+ apr_size_t amt;
+ disk_cache_object_t *dobj = (disk_cache_object_t*) h->cache_obj->vobj;
+
+ disk_cache_info_t disk_info;
+ struct iovec iov[2];
+
+ memset(&disk_info, 0, sizeof(disk_cache_info_t));
+
+ if (dobj->headers_out) {
+ const char *tmp;
+
+ tmp = apr_table_get(dobj->headers_out, "Vary");
+
+ if (tmp) {
+ apr_array_header_t* varray;
+ apr_uint32_t format = VARY_FORMAT_VERSION;
+
+ /* If we were initially opened as a vary format, rollback
+ * that internal state for the moment so we can recreate the
+ * vary format hints in the appropriate directory.
+ */
+ if (dobj->prefix) {
+ dobj->hdrs.file = dobj->prefix;
+ dobj->prefix = NULL;
+ }
+
+ rv = mkdir_structure(conf, dobj->hdrs.file, r->pool);
+ if (rv == APR_SUCCESS) {
+ rv = apr_file_mktemp(&dobj->vary.tempfd, dobj->vary.tempfile,
+ APR_CREATE | APR_WRITE | APR_BINARY | APR_EXCL,
+ dobj->vary.pool);
+ }
+
+ if (rv != APR_SUCCESS) {
+ ap_log_rerror(APLOG_MARK, APLOG_WARNING, rv, r, APLOGNO(00721)
+ "could not create vary file %s",
+ dobj->vary.tempfile);
+ return rv;
+ }
+
+ amt = sizeof(format);
+ rv = apr_file_write_full(dobj->vary.tempfd, &format, amt, NULL);
+ if (rv != APR_SUCCESS) {
+ ap_log_rerror(APLOG_MARK, APLOG_WARNING, rv, r, APLOGNO(00722)
+ "could not write to vary file %s",
+ dobj->vary.tempfile);
+ apr_file_close(dobj->vary.tempfd);
+ apr_pool_destroy(dobj->vary.pool);
+ return rv;
+ }
+
+ amt = sizeof(h->cache_obj->info.expire);
+ rv = apr_file_write_full(dobj->vary.tempfd,
+ &h->cache_obj->info.expire, amt, NULL);
+ if (rv != APR_SUCCESS) {
+ ap_log_rerror(APLOG_MARK, APLOG_WARNING, rv, r, APLOGNO(00723)
+ "could not write to vary file %s",
+ dobj->vary.tempfile);
+ apr_file_close(dobj->vary.tempfd);
+ apr_pool_destroy(dobj->vary.pool);
+ return rv;
+ }
+
+ varray = apr_array_make(r->pool, 6, sizeof(char*));
+ tokens_to_array(r->pool, tmp, varray);
+
+ store_array(dobj->vary.tempfd, varray);
+
+ rv = apr_file_close(dobj->vary.tempfd);
+ if (rv != APR_SUCCESS) {
+ ap_log_rerror(APLOG_MARK, APLOG_WARNING, rv, r, APLOGNO(00724)
+ "could not close vary file %s",
+ dobj->vary.tempfile);
+ apr_pool_destroy(dobj->vary.pool);
+ return rv;
+ }
+
+ tmp = regen_key(r->pool, dobj->headers_in, varray, dobj->name);
+ dobj->prefix = dobj->hdrs.file;
+ dobj->hashfile = NULL;
+ dobj->data.file = data_file(r->pool, conf, dobj, tmp);
+ dobj->hdrs.file = header_file(r->pool, conf, dobj, tmp);
+ }
+ }
+
+
+ rv = apr_file_mktemp(&dobj->hdrs.tempfd, dobj->hdrs.tempfile,
+ APR_CREATE | APR_WRITE | APR_BINARY |
+ APR_BUFFERED | APR_EXCL, dobj->hdrs.pool);
+
+ if (rv != APR_SUCCESS) {
+ ap_log_rerror(APLOG_MARK, APLOG_WARNING, rv, r, APLOGNO(00725)
+ "could not create header file %s",
+ dobj->hdrs.tempfile);
+ return rv;
+ }
+
+ disk_info.format = DISK_FORMAT_VERSION;
+ disk_info.date = h->cache_obj->info.date;
+ disk_info.expire = h->cache_obj->info.expire;
+ disk_info.entity_version = dobj->disk_info.entity_version++;
+ disk_info.request_time = h->cache_obj->info.request_time;
+ disk_info.response_time = h->cache_obj->info.response_time;
+ disk_info.status = h->cache_obj->info.status;
+ disk_info.inode = dobj->disk_info.inode;
+ disk_info.device = dobj->disk_info.device;
+ disk_info.has_body = dobj->disk_info.has_body;
+ disk_info.header_only = dobj->disk_info.header_only;
+
+ disk_info.name_len = strlen(dobj->name);
+
+ memcpy(&disk_info.control, &h->cache_obj->info.control, sizeof(cache_control_t));
+
+ iov[0].iov_base = (void*)&disk_info;
+ iov[0].iov_len = sizeof(disk_cache_info_t);
+ iov[1].iov_base = (void*)dobj->name;
+ iov[1].iov_len = disk_info.name_len;
+
+ rv = apr_file_writev_full(dobj->hdrs.tempfd, (const struct iovec *) &iov,
+ 2, &amt);
+ if (rv != APR_SUCCESS) {
+ ap_log_rerror(APLOG_MARK, APLOG_WARNING, rv, r, APLOGNO(00726)
+ "could not write info to header file %s",
+ dobj->hdrs.tempfile);
+ apr_file_close(dobj->hdrs.tempfd);
+ apr_pool_destroy(dobj->hdrs.pool);
+ return rv;
+ }
+
+ if (dobj->headers_out) {
+ rv = store_table(dobj->hdrs.tempfd, dobj->headers_out);
+ if (rv != APR_SUCCESS) {
+ ap_log_rerror(APLOG_MARK, APLOG_WARNING, rv, r, APLOGNO(00727)
+ "could not write out-headers to header file %s",
+ dobj->hdrs.tempfile);
+ apr_file_close(dobj->hdrs.tempfd);
+ apr_pool_destroy(dobj->hdrs.pool);
+ return rv;
+ }
+ }
+
+ /* Parse the vary header and dump those fields from the headers_in. */
+ /* FIXME: Make call to the same thing cache_select calls to crack Vary. */
+ if (dobj->headers_in) {
+ rv = store_table(dobj->hdrs.tempfd, dobj->headers_in);
+ if (rv != APR_SUCCESS) {
+ ap_log_rerror(APLOG_MARK, APLOG_WARNING, rv, r, APLOGNO(00728)
+ "could not write in-headers to header file %s",
+ dobj->hdrs.tempfile);
+ apr_file_close(dobj->hdrs.tempfd);
+ apr_pool_destroy(dobj->hdrs.pool);
+ return rv;
+ }
+ }
+
+ rv = apr_file_close(dobj->hdrs.tempfd); /* flush and close */
+ if (rv != APR_SUCCESS) {
+ ap_log_rerror(APLOG_MARK, APLOG_WARNING, rv, r, APLOGNO(00729)
+ "could not close header file %s",
+ dobj->hdrs.tempfile);
+ apr_pool_destroy(dobj->hdrs.pool);
+ return rv;
+ }
+
+ return APR_SUCCESS;
+}
+
+static apr_status_t store_body(cache_handle_t *h, request_rec *r,
+ apr_bucket_brigade *in, apr_bucket_brigade *out)
+{
+ apr_bucket *e;
+ apr_status_t rv = APR_SUCCESS;
+ disk_cache_object_t *dobj = (disk_cache_object_t *) h->cache_obj->vobj;
+ disk_cache_dir_conf *dconf = ap_get_module_config(r->per_dir_config, &cache_disk_module);
+ int seen_eos = 0;
+
+ if (!dobj->offset) {
+ dobj->offset = dconf->readsize;
+ }
+ if (!dobj->timeout && dconf->readtime) {
+ dobj->timeout = apr_time_now() + dconf->readtime;
+ }
+
+ if (dobj->offset) {
+ apr_brigade_partition(in, dobj->offset, &e);
+ }
+
+ while (APR_SUCCESS == rv && !APR_BRIGADE_EMPTY(in)) {
+ const char *str;
+ apr_size_t length, written;
+
+ e = APR_BRIGADE_FIRST(in);
+
+ /* are we done completely? if so, pass any trailing buckets right through */
+ if (dobj->done || !dobj->data.pool) {
+ APR_BUCKET_REMOVE(e);
+ APR_BRIGADE_INSERT_TAIL(out, e);
+ continue;
+ }
+
+ /* have we seen eos yet? */
+ if (APR_BUCKET_IS_EOS(e)) {
+ seen_eos = 1;
+ dobj->done = 1;
+ APR_BUCKET_REMOVE(e);
+ APR_BRIGADE_INSERT_TAIL(out, e);
+ break;
+ }
+
+ /* honour flush buckets, we'll get called again */
+ if (APR_BUCKET_IS_FLUSH(e)) {
+ APR_BUCKET_REMOVE(e);
+ APR_BRIGADE_INSERT_TAIL(out, e);
+ break;
+ }
+
+ /* metadata buckets are preserved as is */
+ if (APR_BUCKET_IS_METADATA(e)) {
+ APR_BUCKET_REMOVE(e);
+ APR_BRIGADE_INSERT_TAIL(out, e);
+ continue;
+ }
+
+ /* read the bucket, write to the cache */
+ rv = apr_bucket_read(e, &str, &length, APR_BLOCK_READ);
+ APR_BUCKET_REMOVE(e);
+ APR_BRIGADE_INSERT_TAIL(out, e);
+ if (rv != APR_SUCCESS) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00730)
+ "Error when reading bucket for URL %s",
+ h->cache_obj->key);
+ /* Remove the intermediate cache file and return non-APR_SUCCESS */
+ apr_pool_destroy(dobj->data.pool);
+ return rv;
+ }
+
+ /* don't write empty buckets to the cache */
+ if (!length) {
+ continue;
+ }
+
+ if (!dobj->disk_info.header_only) {
+
+ /* Attempt to create the data file at the last possible moment, if
+ * the body is empty, we don't write a file at all, and save an inode.
+ */
+ if (!dobj->data.tempfd) {
+ apr_finfo_t finfo;
+ rv = apr_file_mktemp(&dobj->data.tempfd, dobj->data.tempfile,
+ APR_CREATE | APR_WRITE | APR_BINARY | APR_BUFFERED
+ | APR_EXCL, dobj->data.pool);
+ if (rv != APR_SUCCESS) {
+ apr_pool_destroy(dobj->data.pool);
+ return rv;
+ }
+ dobj->file_size = 0;
+ rv = apr_file_info_get(&finfo, APR_FINFO_IDENT,
+ dobj->data.tempfd);
+ if (rv != APR_SUCCESS) {
+ apr_pool_destroy(dobj->data.pool);
+ return rv;
+ }
+ dobj->disk_info.device = finfo.device;
+ dobj->disk_info.inode = finfo.inode;
+ dobj->disk_info.has_body = 1;
+ }
+
+ /* write to the cache, leave if we fail */
+ rv = apr_file_write_full(dobj->data.tempfd, str, length, &written);
+ if (rv != APR_SUCCESS) {
+ ap_log_rerror(
+ APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00731) "Error when writing cache file for URL %s", h->cache_obj->key);
+ /* Remove the intermediate cache file and return non-APR_SUCCESS */
+ apr_pool_destroy(dobj->data.pool);
+ return rv;
+ }
+ dobj->file_size += written;
+ if (dobj->file_size > dconf->maxfs) {
+ ap_log_rerror(
+ APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(00732) "URL %s failed the size check "
+ "(%" APR_OFF_T_FMT ">%" APR_OFF_T_FMT ")", h->cache_obj->key, dobj->file_size, dconf->maxfs);
+ /* Remove the intermediate cache file and return non-APR_SUCCESS */
+ apr_pool_destroy(dobj->data.pool);
+ return APR_EGENERAL;
+ }
+
+ }
+
+ /* have we reached the limit of how much we're prepared to write in one
+ * go? If so, leave, we'll get called again. This prevents us from trying
+ * to swallow too much data at once, or taking so long to write the data
+ * the client times out.
+ */
+ dobj->offset -= length;
+ if (dobj->offset <= 0) {
+ dobj->offset = 0;
+ break;
+ }
+ if ((dconf->readtime && apr_time_now() > dobj->timeout)) {
+ dobj->timeout = 0;
+ break;
+ }
+
+ }
+
+ /* Was this the final bucket? If yes, close the temp file and perform
+ * sanity checks.
+ */
+ if (seen_eos) {
+ if (!dobj->disk_info.header_only) {
+ const char *cl_header;
+ apr_off_t cl;
+
+ if (dobj->data.tempfd) {
+ rv = apr_file_close(dobj->data.tempfd);
+ if (rv != APR_SUCCESS) {
+ /* Buffered write failed, abandon attempt to write */
+ apr_pool_destroy(dobj->data.pool);
+ return rv;
+ }
+ }
+
+ if (r->connection->aborted || r->no_cache) {
+ ap_log_rerror(
+ APLOG_MARK, APLOG_INFO, 0, r, APLOGNO(00733) "Discarding body for URL %s "
+ "because connection has been aborted.", h->cache_obj->key);
+ /* Remove the intermediate cache file and return non-APR_SUCCESS */
+ apr_pool_destroy(dobj->data.pool);
+ return APR_EGENERAL;
+ }
+
+ if (dobj->file_size < dconf->minfs) {
+ ap_log_rerror(
+ APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(00734) "URL %s failed the size check "
+ "(%" APR_OFF_T_FMT "<%" APR_OFF_T_FMT ")", h->cache_obj->key, dobj->file_size, dconf->minfs);
+ /* Remove the intermediate cache file and return non-APR_SUCCESS */
+ apr_pool_destroy(dobj->data.pool);
+ return APR_EGENERAL;
+ }
+
+ cl_header = apr_table_get(r->headers_out, "Content-Length");
+ if (cl_header && (!ap_parse_strict_length(&cl, cl_header)
+ || cl != dobj->file_size)) {
+ ap_log_rerror(
+ APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(00735) "URL %s didn't receive complete response, not caching", h->cache_obj->key);
+ /* Remove the intermediate cache file and return non-APR_SUCCESS */
+ apr_pool_destroy(dobj->data.pool);
+ return APR_EGENERAL;
+ }
+ }
+
+ /* All checks were fine, we're good to go when the commit comes */
+ }
+
+ return APR_SUCCESS;
+}
+
+static apr_status_t commit_entity(cache_handle_t *h, request_rec *r)
+{
+ disk_cache_conf *conf = ap_get_module_config(r->server->module_config,
+ &cache_disk_module);
+ disk_cache_object_t *dobj = (disk_cache_object_t *) h->cache_obj->vobj;
+ apr_status_t rv;
+
+ /* write the headers to disk at the last possible moment */
+ rv = write_headers(h, r);
+
+ /* move header and data tempfiles to the final destination */
+ if (APR_SUCCESS == rv) {
+ rv = file_cache_el_final(conf, &dobj->hdrs, r);
+ }
+ if (APR_SUCCESS == rv) {
+ rv = file_cache_el_final(conf, &dobj->vary, r);
+ }
+ if (APR_SUCCESS == rv) {
+ if (!dobj->disk_info.header_only) {
+ rv = file_cache_el_final(conf, &dobj->data, r);
+ }
+ else if (dobj->data.file) {
+ rv = apr_file_remove(dobj->data.file, dobj->data.pool);
+ }
+ }
+
+ /* remove the cached items completely on any failure */
+ if (APR_SUCCESS != rv) {
+ remove_url(h, r);
+ ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(00736)
+ "commit_entity: URL '%s' not cached due to earlier disk error.",
+ dobj->name);
+ }
+ else {
+ ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(00737)
+ "commit_entity: Headers and body for URL %s cached.",
+ dobj->name);
+ }
+
+ apr_pool_destroy(dobj->data.pool);
+
+ return APR_SUCCESS;
+}
+
+static apr_status_t invalidate_entity(cache_handle_t *h, request_rec *r)
+{
+ apr_status_t rv;
+
+ rv = recall_headers(h, r);
+ if (rv != APR_SUCCESS) {
+ return rv;
+ }
+
+ /* mark the entity as invalidated */
+ h->cache_obj->info.control.invalidated = 1;
+
+ return commit_entity(h, r);
+}
+
+static void *create_dir_config(apr_pool_t *p, char *dummy)
+{
+ disk_cache_dir_conf *dconf = apr_pcalloc(p, sizeof(disk_cache_dir_conf));
+
+ dconf->maxfs = DEFAULT_MAX_FILE_SIZE;
+ dconf->minfs = DEFAULT_MIN_FILE_SIZE;
+ dconf->readsize = DEFAULT_READSIZE;
+ dconf->readtime = DEFAULT_READTIME;
+
+ return dconf;
+}
+
+static void *merge_dir_config(apr_pool_t *p, void *basev, void *addv)
+{
+ disk_cache_dir_conf *new = (disk_cache_dir_conf *) apr_pcalloc(p, sizeof(disk_cache_dir_conf));
+ disk_cache_dir_conf *add = (disk_cache_dir_conf *) addv;
+ disk_cache_dir_conf *base = (disk_cache_dir_conf *) basev;
+
+ new->maxfs = (add->maxfs_set == 0) ? base->maxfs : add->maxfs;
+ new->maxfs_set = add->maxfs_set || base->maxfs_set;
+ new->minfs = (add->minfs_set == 0) ? base->minfs : add->minfs;
+ new->minfs_set = add->minfs_set || base->minfs_set;
+ new->readsize = (add->readsize_set == 0) ? base->readsize : add->readsize;
+ new->readsize_set = add->readsize_set || base->readsize_set;
+ new->readtime = (add->readtime_set == 0) ? base->readtime : add->readtime;
+ new->readtime_set = add->readtime_set || base->readtime_set;
+
+ return new;
+}
+
+static void *create_config(apr_pool_t *p, server_rec *s)
+{
+ disk_cache_conf *conf = apr_pcalloc(p, sizeof(disk_cache_conf));
+
+ /* XXX: Set default values */
+ conf->dirlevels = DEFAULT_DIRLEVELS;
+ conf->dirlength = DEFAULT_DIRLENGTH;
+
+ conf->cache_root = NULL;
+ conf->cache_root_len = 0;
+
+ return conf;
+}
+
+/*
+ * mod_cache_disk configuration directives handlers.
+ */
+static const char
+*set_cache_root(cmd_parms *parms, void *in_struct_ptr, const char *arg)
+{
+ disk_cache_conf *conf = ap_get_module_config(parms->server->module_config,
+ &cache_disk_module);
+ conf->cache_root = arg;
+ conf->cache_root_len = strlen(arg);
+ /* TODO: canonicalize cache_root and strip off any trailing slashes */
+
+ return NULL;
+}
+
+/*
+ * Consider eliminating the next two directives in favor of
+ * Ian's prime number hash...
+ * key = hash_fn( r->uri)
+ * filename = "/key % prime1 /key %prime2/key %prime3"
+ */
+static const char
+*set_cache_dirlevels(cmd_parms *parms, void *in_struct_ptr, const char *arg)
+{
+ disk_cache_conf *conf = ap_get_module_config(parms->server->module_config,
+ &cache_disk_module);
+ int val = atoi(arg);
+ if (val < 1)
+ return "CacheDirLevels value must be an integer greater than 0";
+ if (val * conf->dirlength > CACHEFILE_LEN)
+ return "CacheDirLevels*CacheDirLength value must not be higher than 20";
+ conf->dirlevels = val;
+ return NULL;
+}
+static const char
+*set_cache_dirlength(cmd_parms *parms, void *in_struct_ptr, const char *arg)
+{
+ disk_cache_conf *conf = ap_get_module_config(parms->server->module_config,
+ &cache_disk_module);
+ int val = atoi(arg);
+ if (val < 1)
+ return "CacheDirLength value must be an integer greater than 0";
+ if (val * conf->dirlevels > CACHEFILE_LEN)
+ return "CacheDirLevels*CacheDirLength value must not be higher than 20";
+
+ conf->dirlength = val;
+ return NULL;
+}
+
+static const char
+*set_cache_minfs(cmd_parms *parms, void *in_struct_ptr, const char *arg)
+{
+ disk_cache_dir_conf *dconf = (disk_cache_dir_conf *)in_struct_ptr;
+
+ if (apr_strtoff(&dconf->minfs, arg, NULL, 10) != APR_SUCCESS ||
+ dconf->minfs < 0)
+ {
+ return "CacheMinFileSize argument must be a non-negative integer representing the min size of a file to cache in bytes.";
+ }
+ dconf->minfs_set = 1;
+ return NULL;
+}
+
+static const char
+*set_cache_maxfs(cmd_parms *parms, void *in_struct_ptr, const char *arg)
+{
+ disk_cache_dir_conf *dconf = (disk_cache_dir_conf *)in_struct_ptr;
+
+ if (apr_strtoff(&dconf->maxfs, arg, NULL, 10) != APR_SUCCESS ||
+ dconf->maxfs < 0)
+ {
+ return "CacheMaxFileSize argument must be a non-negative integer representing the max size of a file to cache in bytes.";
+ }
+ dconf->maxfs_set = 1;
+ return NULL;
+}
+
+static const char
+*set_cache_readsize(cmd_parms *parms, void *in_struct_ptr, const char *arg)
+{
+ disk_cache_dir_conf *dconf = (disk_cache_dir_conf *)in_struct_ptr;
+
+ if (apr_strtoff(&dconf->readsize, arg, NULL, 10) != APR_SUCCESS ||
+ dconf->readsize < 0)
+ {
+ return "CacheReadSize argument must be a non-negative integer representing the max amount of data to cache in go.";
+ }
+ dconf->readsize_set = 1;
+ return NULL;
+}
+
+static const char
+*set_cache_readtime(cmd_parms *parms, void *in_struct_ptr, const char *arg)
+{
+ disk_cache_dir_conf *dconf = (disk_cache_dir_conf *)in_struct_ptr;
+ apr_off_t milliseconds;
+
+ if (apr_strtoff(&milliseconds, arg, NULL, 10) != APR_SUCCESS ||
+ milliseconds < 0)
+ {
+ return "CacheReadTime argument must be a non-negative integer representing the max amount of time taken to cache in go.";
+ }
+ dconf->readtime = apr_time_from_msec(milliseconds);
+ dconf->readtime_set = 1;
+ return NULL;
+}
+
+static const command_rec disk_cache_cmds[] =
+{
+ AP_INIT_TAKE1("CacheRoot", set_cache_root, NULL, RSRC_CONF,
+ "The directory to store cache files"),
+ AP_INIT_TAKE1("CacheDirLevels", set_cache_dirlevels, NULL, RSRC_CONF,
+ "The number of levels of subdirectories in the cache"),
+ AP_INIT_TAKE1("CacheDirLength", set_cache_dirlength, NULL, RSRC_CONF,
+ "The number of characters in subdirectory names"),
+ AP_INIT_TAKE1("CacheMinFileSize", set_cache_minfs, NULL, RSRC_CONF | ACCESS_CONF,
+ "The minimum file size to cache a document"),
+ AP_INIT_TAKE1("CacheMaxFileSize", set_cache_maxfs, NULL, RSRC_CONF | ACCESS_CONF,
+ "The maximum file size to cache a document"),
+ AP_INIT_TAKE1("CacheReadSize", set_cache_readsize, NULL, RSRC_CONF | ACCESS_CONF,
+ "The maximum quantity of data to attempt to read and cache in one go"),
+ AP_INIT_TAKE1("CacheReadTime", set_cache_readtime, NULL, RSRC_CONF | ACCESS_CONF,
+ "The maximum time taken to attempt to read and cache in go"),
+ {NULL}
+};
+
+static const cache_provider cache_disk_provider =
+{
+ &remove_entity,
+ &store_headers,
+ &store_body,
+ &recall_headers,
+ &recall_body,
+ &create_entity,
+ &open_entity,
+ &remove_url,
+ &commit_entity,
+ &invalidate_entity
+};
+
+static void disk_cache_register_hook(apr_pool_t *p)
+{
+ /* cache initializer */
+ ap_register_provider(p, CACHE_PROVIDER_GROUP, "disk", "0",
+ &cache_disk_provider);
+}
+
+AP_DECLARE_MODULE(cache_disk) = {
+ STANDARD20_MODULE_STUFF,
+ create_dir_config, /* create per-directory config structure */
+ merge_dir_config, /* merge per-directory config structures */
+ create_config, /* create per-server config structure */
+ NULL, /* merge per-server config structures */
+ disk_cache_cmds, /* command apr_table_t */
+ disk_cache_register_hook /* register hooks */
+};