--- /dev/null
+/* 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 "apr_buckets.h"
+#include "httpd.h"
+#include "http_config.h"
+#include "http_log.h"
+#include "http_core.h"
+#include "ap_provider.h"
+#include "ap_socache.h"
+#include "util_filter.h"
+#include "util_script.h"
+#include "util_charset.h"
+#include "util_mutex.h"
+
+#include "mod_cache.h"
+
+#include "cache_socache_common.h"
+
+/*
+ * mod_cache_socache: Shared Object Cache Based HTTP 1.1 Cache.
+ *
+ * Flow to Find the entry:
+ * Incoming client requests URI /foo/bar/baz
+ * Fetch URI key (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 key using HeaderName+HeaderValue+.../foo/bar/baz
+ * re-read in key (must be format #2)
+ *
+ * Format #1:
+ * apr_uint32_t format;
+ * apr_time_t expire;
+ * apr_array_t vary_headers (delimited by CRLF)
+ *
+ * Format #2:
+ * cache_socache_info_t (first sizeof(apr_uint32_t) bytes is the format)
+ * entity name (sobj->name) [length is in cache_socache_info_t->name_len]
+ * r->headers_out (delimited by CRLF)
+ * CRLF
+ * r->headers_in (delimited by CRLF)
+ * CRLF
+ */
+
+module AP_MODULE_DECLARE_DATA cache_socache_module;
+
+/*
+ * cache_socache_object_t
+ * Pointed to by cache_object_t::vobj
+ */
+typedef struct cache_socache_object_t
+{
+ apr_pool_t *pool; /* pool */
+ unsigned char *buffer; /* the cache buffer */
+ apr_size_t buffer_len; /* size of the buffer */
+ apr_bucket_brigade *body; /* brigade containing the body, if any */
+ apr_table_t *headers_in; /* Input headers to save */
+ apr_table_t *headers_out; /* Output headers to save */
+ cache_socache_info_t socache_info; /* Header information. */
+ apr_size_t body_offset; /* offset to the start of the body */
+ unsigned int newbody :1; /* whether a new body is present */
+ apr_time_t expire; /* when to expire the entry */
+
+ const char *name; /* Requested URI without vary bits - suitable for mortals. */
+ const char *key; /* On-disk prefix; URI with Vary bits (if present) */
+ apr_off_t file_size; /* File size of the cached data file */
+ apr_off_t offset; /* Max size to set aside */
+ apr_time_t timeout; /* Max time to set aside */
+ unsigned int done :1; /* Is the attempt to cache complete? */
+} cache_socache_object_t;
+
+/*
+ * mod_cache_socache configuration
+ */
+#define DEFAULT_MAX_FILE_SIZE 100*1024
+#define DEFAULT_MAXTIME 86400
+#define DEFAULT_MINTIME 600
+#define DEFAULT_READSIZE 0
+#define DEFAULT_READTIME 0
+
+typedef struct cache_socache_provider_conf
+{
+ const char *args;
+ ap_socache_provider_t *socache_provider;
+ ap_socache_instance_t *socache_instance;
+} cache_socache_provider_conf;
+
+typedef struct cache_socache_conf
+{
+ cache_socache_provider_conf *provider;
+} cache_socache_conf;
+
+typedef struct cache_socache_dir_conf
+{
+ apr_off_t max; /* maximum file size for cached files */
+ apr_time_t maxtime; /* maximum expiry time */
+ apr_time_t mintime; /* minimum expiry time */
+ apr_off_t readsize; /* maximum data to attempt to cache in one go */
+ apr_time_t readtime; /* maximum time taken to cache in one go */
+ unsigned int max_set :1;
+ unsigned int maxtime_set :1;
+ unsigned int mintime_set :1;
+ unsigned int readsize_set :1;
+ unsigned int readtime_set :1;
+} cache_socache_dir_conf;
+
+/* Shared object cache and mutex */
+static const char * const cache_socache_id = "cache-socache";
+static apr_global_mutex_t *socache_mutex = NULL;
+
+/*
+ * Local static functions
+ */
+
+static apr_status_t read_array(request_rec *r, apr_array_header_t *arr,
+ unsigned char *buffer, apr_size_t buffer_len, apr_size_t *slider)
+{
+ apr_size_t val = *slider;
+
+ while (*slider < buffer_len) {
+ if (buffer[*slider] == '\r') {
+ if (val == *slider) {
+ (*slider)++;
+ return APR_SUCCESS;
+ }
+ *((const char **) apr_array_push(arr)) = apr_pstrndup(r->pool,
+ (const char *) buffer + val, *slider - val);
+ (*slider)++;
+ if (buffer[*slider] == '\n') {
+ (*slider)++;
+ }
+ val = *slider;
+ }
+ else if (buffer[*slider] == '\0') {
+ (*slider)++;
+ return APR_SUCCESS;
+ }
+ else {
+ (*slider)++;
+ }
+ }
+
+ return APR_EOF;
+}
+
+static apr_status_t store_array(apr_array_header_t *arr, unsigned char *buffer,
+ apr_size_t buffer_len, apr_size_t *slider)
+{
+ int i, len;
+ const char **elts;
+
+ elts = (const char **) arr->elts;
+
+ for (i = 0; i < arr->nelts; i++) {
+ len = strlen(elts[i]);
+ if (len + 3 >= buffer_len - *slider) {
+ return APR_EOF;
+ }
+ len = apr_snprintf(buffer ? (char *) buffer + *slider : NULL,
+ buffer ? buffer_len - *slider : 0, "%s" CRLF, elts[i]);
+ *slider += len;
+ }
+ if (buffer) {
+ memcpy(buffer + *slider, CRLF, sizeof(CRLF) - 1);
+ }
+ *slider += sizeof(CRLF) - 1;
+
+ return APR_SUCCESS;
+}
+
+static apr_status_t read_table(cache_handle_t *handle, request_rec *r,
+ apr_table_t *table, unsigned char *buffer, apr_size_t buffer_len,
+ apr_size_t *slider)
+{
+ apr_size_t key = *slider, colon = 0, len = 0;
+ ;
+
+ while (*slider < buffer_len) {
+ if (buffer[*slider] == ':') {
+ if (!colon) {
+ colon = *slider;
+ }
+ (*slider)++;
+ }
+ else if (buffer[*slider] == '\r') {
+ len = colon;
+ if (key == *slider) {
+ (*slider)++;
+ if (buffer[*slider] == '\n') {
+ (*slider)++;
+ }
+ return APR_SUCCESS;
+ }
+ if (!colon || buffer[colon++] != ':') {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(02344)
+ "Premature end of cache headers.");
+ return APR_EGENERAL;
+ }
+ while (apr_isspace(buffer[colon])) {
+ colon++;
+ }
+ apr_table_addn(table, apr_pstrndup(r->pool, (const char *) buffer
+ + key, len - key), apr_pstrndup(r->pool,
+ (const char *) buffer + colon, *slider - colon));
+ (*slider)++;
+ if (buffer[*slider] == '\n') {
+ (*slider)++;
+ }
+ key = *slider;
+ colon = 0;
+ }
+ else if (buffer[*slider] == '\0') {
+ (*slider)++;
+ return APR_SUCCESS;
+ }
+ else {
+ (*slider)++;
+ }
+ }
+
+ return APR_EOF;
+}
+
+static apr_status_t store_table(apr_table_t *table, unsigned char *buffer,
+ apr_size_t buffer_len, apr_size_t *slider)
+{
+ int i, len;
+ 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) {
+ apr_size_t key_len = strlen(elts[i].key);
+ apr_size_t val_len = strlen(elts[i].val);
+ if (key_len + val_len + 5 >= buffer_len - *slider) {
+ return APR_EOF;
+ }
+ len = apr_snprintf(buffer ? (char *) buffer + *slider : NULL,
+ buffer ? buffer_len - *slider : 0, "%s: %s" CRLF,
+ elts[i].key, elts[i].val);
+ *slider += len;
+ }
+ }
+ if (3 >= buffer_len - *slider) {
+ return APR_EOF;
+ }
+ if (buffer) {
+ memcpy(buffer + *slider, CRLF, sizeof(CRLF) - 1);
+ }
+ *slider += sizeof(CRLF) - 1;
+
+ 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 [exerpt]
+ * 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 [exerpt]
+ * 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)
+{
+ cache_socache_dir_conf *dconf =
+ ap_get_module_config(r->per_dir_config, &cache_socache_module);
+ cache_socache_conf *conf = ap_get_module_config(r->server->module_config,
+ &cache_socache_module);
+ cache_object_t *obj;
+ cache_socache_object_t *sobj;
+ apr_size_t total;
+
+ if (conf->provider == NULL) {
+ return DECLINED;
+ }
+
+ /* we don't support caching of range requests (yet) */
+ /* TODO: but we could */
+ if (r->status == HTTP_PARTIAL_CONTENT) {
+ ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(02345)
+ "URL %s partial content response not cached",
+ key);
+ return DECLINED;
+ }
+
+ /*
+ * We have a chicken and egg problem. We don't know until we
+ * attempt to store_headers just how big the response will be
+ * and whether it will fit in the cache limits set. But we
+ * need to make a decision now as to whether we plan to try.
+ * If we make the wrong decision, we could prevent another
+ * cache implementation, such as cache_disk, from getting the
+ * opportunity to cache, and that would be unfortunate.
+ *
+ * In a series of tests, from cheapest to most expensive,
+ * decide whether or not to ignore this attempt to cache,
+ * with a small margin just to be sure.
+ */
+ if (len < 0) {
+ ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(02346)
+ "URL '%s' had no explicit size, ignoring", key);
+ return DECLINED;
+ }
+ if (len > dconf->max) {
+ ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(02347)
+ "URL '%s' body larger than limit, ignoring "
+ "(%" APR_OFF_T_FMT " > %" APR_OFF_T_FMT ")",
+ key, len, dconf->max);
+ return DECLINED;
+ }
+
+ /* estimate the total cached size, given current headers */
+ total = len + sizeof(cache_socache_info_t) + strlen(key);
+ if (APR_SUCCESS != store_table(r->headers_out, NULL, dconf->max, &total)
+ || APR_SUCCESS != store_table(r->headers_in, NULL, dconf->max,
+ &total)) {
+ ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(02348)
+ "URL '%s' estimated headers size larger than limit, ignoring "
+ "(%" APR_SIZE_T_FMT " > %" APR_OFF_T_FMT ")",
+ key, total, dconf->max);
+ return DECLINED;
+ }
+
+ if (total >= dconf->max) {
+ ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(02349)
+ "URL '%s' body and headers larger than limit, ignoring "
+ "(%" APR_OFF_T_FMT " > %" APR_OFF_T_FMT ")",
+ key, len, dconf->max);
+ return DECLINED;
+ }
+
+ /* Allocate and initialize cache_object_t and cache_socache_object_t */
+ h->cache_obj = obj = apr_pcalloc(r->pool, sizeof(*obj));
+ obj->vobj = sobj = apr_pcalloc(r->pool, sizeof(*sobj));
+
+ obj->key = apr_pstrdup(r->pool, key);
+ sobj->key = obj->key;
+ sobj->name = obj->key;
+
+ return OK;
+}
+
+static int open_entity(cache_handle_t *h, request_rec *r, const char *key)
+{
+ cache_socache_dir_conf *dconf =
+ ap_get_module_config(r->per_dir_config, &cache_socache_module);
+ cache_socache_conf *conf = ap_get_module_config(r->server->module_config,
+ &cache_socache_module);
+ apr_uint32_t format;
+ apr_size_t slider;
+ unsigned int buffer_len;
+ const char *nkey;
+ apr_status_t rc;
+ cache_object_t *obj;
+ cache_info *info;
+ cache_socache_object_t *sobj;
+ apr_size_t len;
+
+ nkey = NULL;
+ h->cache_obj = NULL;
+
+ if (!conf->provider || !conf->provider->socache_instance) {
+ return DECLINED;
+ }
+
+ /* Create and init the cache object */
+ obj = apr_pcalloc(r->pool, sizeof(cache_object_t));
+ sobj = apr_pcalloc(r->pool, sizeof(cache_socache_object_t));
+
+ info = &(obj->info);
+
+ /* Create a temporary pool for the buffer, and destroy it if something
+ * goes wrong so we don't have large buffers of unused memory hanging
+ * about for the lifetime of the response.
+ */
+ apr_pool_create(&sobj->pool, r->pool);
+
+ sobj->buffer = apr_palloc(sobj->pool, dconf->max + 1);
+ sobj->buffer_len = dconf->max + 1;
+
+ /* attempt to retrieve the cached entry */
+ if (socache_mutex) {
+ apr_status_t status = apr_global_mutex_lock(socache_mutex);
+ if (status != APR_SUCCESS) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, status, r, APLOGNO(02350)
+ "could not acquire lock, ignoring: %s", obj->key);
+ apr_pool_destroy(sobj->pool);
+ sobj->pool = NULL;
+ return DECLINED;
+ }
+ }
+ buffer_len = sobj->buffer_len;
+ rc = conf->provider->socache_provider->retrieve(
+ conf->provider->socache_instance, r->server, (unsigned char *) key,
+ strlen(key), sobj->buffer, &buffer_len, r->pool);
+ if (socache_mutex) {
+ apr_status_t status = apr_global_mutex_unlock(socache_mutex);
+ if (status != APR_SUCCESS) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, status, r, APLOGNO(02351)
+ "could not release lock, ignoring: %s", obj->key);
+ apr_pool_destroy(sobj->pool);
+ sobj->pool = NULL;
+ return DECLINED;
+ }
+ }
+ if (rc != APR_SUCCESS) {
+ ap_log_rerror(APLOG_MARK, APLOG_DEBUG, rc, r, APLOGNO(02352)
+ "Key not found in cache: %s", key);
+ apr_pool_destroy(sobj->pool);
+ sobj->pool = NULL;
+ return DECLINED;
+ }
+ if (buffer_len >= sobj->buffer_len) {
+ ap_log_rerror(APLOG_MARK, APLOG_DEBUG, rc, r, APLOGNO(02353)
+ "Key found in cache but too big, ignoring: %s", key);
+ apr_pool_destroy(sobj->pool);
+ sobj->pool = NULL;
+ return DECLINED;
+ }
+
+ /* read the format from the cache file */
+ memcpy(&format, sobj->buffer, sizeof(format));
+ slider = sizeof(format);
+
+ if (format == CACHE_SOCACHE_VARY_FORMAT_VERSION) {
+ apr_array_header_t* varray;
+ apr_time_t expire;
+
+ memcpy(&expire, sobj->buffer + slider, sizeof(expire));
+ slider += sizeof(expire);
+
+ varray = apr_array_make(r->pool, 5, sizeof(char*));
+ rc = read_array(r, varray, sobj->buffer, buffer_len, &slider);
+ if (rc != APR_SUCCESS) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, rc, r, APLOGNO(02354)
+ "Cannot parse vary entry for key: %s", key);
+ apr_pool_destroy(sobj->pool);
+ sobj->pool = NULL;
+ return DECLINED;
+ }
+
+ nkey = regen_key(r->pool, r->headers_in, varray, key);
+
+ /* attempt to retrieve the cached entry */
+ if (socache_mutex) {
+ apr_status_t status = apr_global_mutex_lock(socache_mutex);
+ if (status != APR_SUCCESS) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, status, r, APLOGNO(02355)
+ "could not acquire lock, ignoring: %s", obj->key);
+ apr_pool_destroy(sobj->pool);
+ sobj->pool = NULL;
+ return DECLINED;
+ }
+ }
+ buffer_len = sobj->buffer_len;
+ rc = conf->provider->socache_provider->retrieve(
+ conf->provider->socache_instance, r->server,
+ (unsigned char *) nkey, strlen(nkey), sobj->buffer,
+ &buffer_len, r->pool);
+ if (socache_mutex) {
+ apr_status_t status = apr_global_mutex_unlock(socache_mutex);
+ if (status != APR_SUCCESS) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, status, r, APLOGNO(02356)
+ "could not release lock, ignoring: %s", obj->key);
+ apr_pool_destroy(sobj->pool);
+ sobj->pool = NULL;
+ return DECLINED;
+ }
+ }
+ if (rc != APR_SUCCESS) {
+ ap_log_rerror(APLOG_MARK, APLOG_DEBUG, rc, r, APLOGNO(02357)
+ "Key not found in cache: %s", key);
+ apr_pool_destroy(sobj->pool);
+ sobj->pool = NULL;
+ return DECLINED;
+ }
+ if (buffer_len >= sobj->buffer_len) {
+ ap_log_rerror(APLOG_MARK, APLOG_DEBUG, rc, r, APLOGNO(02358)
+ "Key found in cache but too big, ignoring: %s", key);
+ goto fail;
+ }
+
+ }
+ else if (format != CACHE_SOCACHE_DISK_FORMAT_VERSION) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(02359)
+ "Key '%s' found in cache has version %d, expected %d, ignoring",
+ key, format, CACHE_SOCACHE_DISK_FORMAT_VERSION);
+ goto fail;
+ }
+ else {
+ nkey = key;
+ }
+
+ obj->key = nkey;
+ sobj->key = nkey;
+ sobj->name = key;
+
+ if (buffer_len >= sizeof(cache_socache_info_t)) {
+ memcpy(&sobj->socache_info, sobj->buffer, sizeof(cache_socache_info_t));
+ }
+ else {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, rc, r, APLOGNO(02360)
+ "Cache entry for key '%s' too short, removing", nkey);
+ goto fail;
+ }
+ slider = sizeof(cache_socache_info_t);
+
+ /* Store it away so we can get it later. */
+ info->status = sobj->socache_info.status;
+ info->date = sobj->socache_info.date;
+ info->expire = sobj->socache_info.expire;
+ info->request_time = sobj->socache_info.request_time;
+ info->response_time = sobj->socache_info.response_time;
+
+ memcpy(&info->control, &sobj->socache_info.control, sizeof(cache_control_t));
+
+ if (sobj->socache_info.name_len <= buffer_len - slider) {
+ if (strncmp((const char *) sobj->buffer + slider, sobj->name,
+ sobj->socache_info.name_len)) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, rc, r, APLOGNO(02361)
+ "Cache entry for key '%s' URL mismatch, ignoring", nkey);
+ apr_pool_destroy(sobj->pool);
+ sobj->pool = NULL;
+ return DECLINED;
+ }
+ slider += sobj->socache_info.name_len;
+ }
+ else {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, rc, r, APLOGNO(02362)
+ "Cache entry for key '%s' too short, removing", nkey);
+ goto fail;
+ }
+
+ /* Is this a cached HEAD request? */
+ if (sobj->socache_info.header_only && !r->header_only) {
+ ap_log_rerror(APLOG_MARK, APLOG_DEBUG, APR_SUCCESS, r, APLOGNO(02363)
+ "HEAD request cached, non-HEAD requested, ignoring: %s",
+ sobj->key);
+ apr_pool_destroy(sobj->pool);
+ sobj->pool = NULL;
+ return DECLINED;
+ }
+
+ 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 */
+ if (APR_SUCCESS != read_table(h, r, h->resp_hdrs, sobj->buffer, buffer_len,
+ &slider)) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, rc, r, APLOGNO(02364)
+ "Cache entry for key '%s' response headers unreadable, removing", nkey);
+ goto fail;
+ }
+ if (APR_SUCCESS != read_table(h, r, h->req_hdrs, sobj->buffer, buffer_len,
+ &slider)) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, rc, r, APLOGNO(02365)
+ "Cache entry for key '%s' request headers unreadable, removing", nkey);
+ goto fail;
+ }
+
+ /* Retrieve the body if we have one */
+ sobj->body = apr_brigade_create(r->pool, r->connection->bucket_alloc);
+ len = buffer_len - slider;
+
+ /*
+ * Optimisation: if the body is small, we want to make a
+ * copy of the body and free the temporary pool, as we
+ * don't want large blocks of unused memory hanging around
+ * to the end of the response. In contrast, if the body is
+ * large, we would rather leave the body where it is in the
+ * temporary pool, and save ourselves the copy.
+ */
+ if (len * 2 > dconf->max) {
+ apr_bucket *e;
+
+ /* large - use the brigade as is, we're done */
+ e = apr_bucket_immortal_create((const char *) sobj->buffer + slider,
+ len, r->connection->bucket_alloc);
+
+ APR_BRIGADE_INSERT_TAIL(sobj->body, e);
+ }
+ else {
+
+ /* small - make a copy of the data... */
+ apr_brigade_write(sobj->body, NULL, NULL, (const char *) sobj->buffer
+ + slider, len);
+
+ /* ...and get rid of the large memory buffer */
+ apr_pool_destroy(sobj->pool);
+ sobj->pool = NULL;
+ }
+
+ /* make the configuration stick */
+ h->cache_obj = obj;
+ obj->vobj = sobj;
+
+ return OK;
+
+fail:
+ if (socache_mutex) {
+ apr_status_t status = apr_global_mutex_lock(socache_mutex);
+ if (status != APR_SUCCESS) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, status, r, APLOGNO(02366)
+ "could not acquire lock, ignoring: %s", obj->key);
+ apr_pool_destroy(sobj->pool);
+ sobj->pool = NULL;
+ return DECLINED;
+ }
+ }
+ conf->provider->socache_provider->remove(
+ conf->provider->socache_instance, r->server,
+ (unsigned char *) nkey, strlen(nkey), r->pool);
+ if (socache_mutex) {
+ apr_status_t status = apr_global_mutex_unlock(socache_mutex);
+ if (status != APR_SUCCESS) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, status, r, APLOGNO(02367)
+ "could not release lock, ignoring: %s", obj->key);
+ }
+ }
+ apr_pool_destroy(sobj->pool);
+ sobj->pool = NULL;
+ return DECLINED;
+}
+
+static int remove_entity(cache_handle_t *h)
+{
+ /* 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)
+{
+ cache_socache_conf *conf = ap_get_module_config(r->server->module_config,
+ &cache_socache_module);
+ cache_socache_object_t *sobj;
+
+ sobj = (cache_socache_object_t *) h->cache_obj->vobj;
+ if (!sobj) {
+ return DECLINED;
+ }
+
+ /* Remove the key from the cache */
+ if (socache_mutex) {
+ apr_status_t status = apr_global_mutex_lock(socache_mutex);
+ if (status != APR_SUCCESS) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, status, r, APLOGNO(02368)
+ "could not acquire lock, ignoring: %s", sobj->key);
+ apr_pool_destroy(sobj->pool);
+ sobj->pool = NULL;
+ return DECLINED;
+ }
+ }
+ conf->provider->socache_provider->remove(conf->provider->socache_instance,
+ r->server, (unsigned char *) sobj->key, strlen(sobj->key), r->pool);
+ if (socache_mutex) {
+ apr_status_t status = apr_global_mutex_unlock(socache_mutex);
+ if (status != APR_SUCCESS) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, status, r, APLOGNO(02369)
+ "could not release lock, ignoring: %s", sobj->key);
+ apr_pool_destroy(sobj->pool);
+ sobj->pool = NULL;
+ return DECLINED;
+ }
+ }
+
+ return OK;
+}
+
+static apr_status_t recall_headers(cache_handle_t *h, request_rec *r)
+{
+ /* we recalled the headers during open_entity, so do nothing */
+ return APR_SUCCESS;
+}
+
+static apr_status_t recall_body(cache_handle_t *h, apr_pool_t *p,
+ apr_bucket_brigade *bb)
+{
+ cache_socache_object_t *sobj = (cache_socache_object_t*) h->cache_obj->vobj;
+ apr_bucket *e;
+
+ e = APR_BRIGADE_FIRST(sobj->body);
+
+ if (e != APR_BRIGADE_SENTINEL(sobj->body)) {
+ APR_BUCKET_REMOVE(e);
+ APR_BRIGADE_INSERT_TAIL(bb, e);
+ }
+
+ return APR_SUCCESS;
+}
+
+static apr_status_t store_headers(cache_handle_t *h, request_rec *r,
+ cache_info *info)
+{
+ cache_socache_dir_conf *dconf =
+ ap_get_module_config(r->per_dir_config, &cache_socache_module);
+ cache_socache_conf *conf = ap_get_module_config(r->server->module_config,
+ &cache_socache_module);
+ apr_size_t slider;
+ apr_status_t rv;
+ cache_object_t *obj = h->cache_obj;
+ cache_socache_object_t *sobj = (cache_socache_object_t*) obj->vobj;
+ cache_socache_info_t *socache_info;
+
+ memcpy(&h->cache_obj->info, info, sizeof(cache_info));
+
+ if (r->headers_out) {
+ sobj->headers_out = ap_cache_cacheable_headers_out(r);
+ }
+
+ if (r->headers_in) {
+ sobj->headers_in = ap_cache_cacheable_headers_in(r);
+ }
+
+ sobj->expire
+ = obj->info.expire > r->request_time + dconf->maxtime ? r->request_time
+ + dconf->maxtime
+ : obj->info.expire + dconf->mintime;
+
+ apr_pool_create(&sobj->pool, r->pool);
+
+ sobj->buffer = apr_palloc(sobj->pool, dconf->max);
+ sobj->buffer_len = dconf->max;
+ socache_info = (cache_socache_info_t *) sobj->buffer;
+
+ if (sobj->headers_out) {
+ const char *vary;
+
+ vary = apr_table_get(sobj->headers_out, "Vary");
+
+ if (vary) {
+ apr_array_header_t* varray;
+ apr_uint32_t format = CACHE_SOCACHE_VARY_FORMAT_VERSION;
+
+ memcpy(sobj->buffer, &format, sizeof(format));
+ slider = sizeof(format);
+
+ memcpy(sobj->buffer + slider, &obj->info.expire,
+ sizeof(obj->info.expire));
+ slider += sizeof(obj->info.expire);
+
+ varray = apr_array_make(r->pool, 6, sizeof(char*));
+ tokens_to_array(r->pool, vary, varray);
+
+ if (APR_SUCCESS != (rv = store_array(varray, sobj->buffer,
+ sobj->buffer_len, &slider))) {
+ ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, r, APLOGNO(02370)
+ "buffer too small for Vary array, caching aborted: %s",
+ obj->key);
+ apr_pool_destroy(sobj->pool);
+ sobj->pool = NULL;
+ return rv;
+ }
+ if (socache_mutex) {
+ apr_status_t status = apr_global_mutex_lock(socache_mutex);
+ if (status != APR_SUCCESS) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, status, r, APLOGNO(02371)
+ "could not acquire lock, ignoring: %s", obj->key);
+ apr_pool_destroy(sobj->pool);
+ sobj->pool = NULL;
+ return status;
+ }
+ }
+ rv = conf->provider->socache_provider->store(
+ conf->provider->socache_instance, r->server,
+ (unsigned char *) obj->key, strlen(obj->key), sobj->expire,
+ (unsigned char *) sobj->buffer, (unsigned int) slider,
+ sobj->pool);
+ if (socache_mutex) {
+ apr_status_t status = apr_global_mutex_unlock(socache_mutex);
+ if (status != APR_SUCCESS) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, status, r, APLOGNO(02372)
+ "could not release lock, ignoring: %s", obj->key);
+ }
+ }
+ if (rv != APR_SUCCESS) {
+ ap_log_rerror(APLOG_MARK, APLOG_DEBUG, rv, r, APLOGNO(02373)
+ "Vary not written to cache, ignoring: %s", obj->key);
+ apr_pool_destroy(sobj->pool);
+ sobj->pool = NULL;
+ return rv;
+ }
+
+ obj->key = sobj->key = regen_key(r->pool, sobj->headers_in, varray,
+ sobj->name);
+ }
+ }
+
+ socache_info->format = CACHE_SOCACHE_DISK_FORMAT_VERSION;
+ socache_info->date = obj->info.date;
+ socache_info->expire = obj->info.expire;
+ socache_info->entity_version = sobj->socache_info.entity_version++;
+ socache_info->request_time = obj->info.request_time;
+ socache_info->response_time = obj->info.response_time;
+ socache_info->status = obj->info.status;
+ socache_info->header_only = r->header_only;
+
+ socache_info->name_len = strlen(sobj->name);
+
+ memcpy(&socache_info->control, &obj->info.control, sizeof(cache_control_t));
+ slider = sizeof(cache_socache_info_t);
+
+ if (slider + socache_info->name_len >= sobj->buffer_len) {
+ ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, r, APLOGNO(02374)
+ "cache buffer too small for name: %s",
+ sobj->name);
+ apr_pool_destroy(sobj->pool);
+ sobj->pool = NULL;
+ return APR_EGENERAL;
+ }
+ memcpy(sobj->buffer + slider, sobj->name, socache_info->name_len);
+ slider += socache_info->name_len;
+
+ if (sobj->headers_out) {
+ if (APR_SUCCESS != store_table(sobj->headers_out, sobj->buffer,
+ sobj->buffer_len, &slider)) {
+ ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, r, APLOGNO(02375)
+ "out-headers didn't fit in buffer: %s", sobj->name);
+ apr_pool_destroy(sobj->pool);
+ sobj->pool = NULL;
+ return APR_EGENERAL;
+ }
+ }
+
+ /* Parse the vary header and dump those fields from the headers_in. */
+ /* TODO: Make call to the same thing cache_select calls to crack Vary. */
+ if (sobj->headers_in) {
+ if (APR_SUCCESS != store_table(sobj->headers_in, sobj->buffer,
+ sobj->buffer_len, &slider)) {
+ ap_log_rerror(APLOG_MARK, APLOG_WARNING, rv, r, APLOGNO(02376)
+ "in-headers didn't fit in buffer %s",
+ sobj->key);
+ apr_pool_destroy(sobj->pool);
+ sobj->pool = NULL;
+ return APR_EGENERAL;
+ }
+ }
+
+ sobj->body_offset = slider;
+
+ 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;
+ cache_socache_object_t *sobj =
+ (cache_socache_object_t *) h->cache_obj->vobj;
+ cache_socache_dir_conf *dconf =
+ ap_get_module_config(r->per_dir_config, &cache_socache_module);
+ int seen_eos = 0;
+
+ if (!sobj->offset) {
+ sobj->offset = dconf->readsize;
+ }
+ if (!sobj->timeout && dconf->readtime) {
+ sobj->timeout = apr_time_now() + dconf->readtime;
+ }
+
+ if (!sobj->newbody) {
+ if (sobj->body) {
+ apr_brigade_cleanup(sobj->body);
+ }
+ else {
+ sobj->body = apr_brigade_create(r->pool,
+ r->connection->bucket_alloc);
+ }
+ sobj->newbody = 1;
+ }
+ if (sobj->offset) {
+ apr_brigade_partition(in, sobj->offset, &e);
+ }
+
+ while (APR_SUCCESS == rv && !APR_BRIGADE_EMPTY(in)) {
+ const char *str;
+ apr_size_t length;
+
+ e = APR_BRIGADE_FIRST(in);
+
+ /* are we done completely? if so, pass any trailing buckets right through */
+ if (sobj->done || !sobj->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;
+ sobj->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(02377)
+ "Error when reading bucket for URL %s",
+ h->cache_obj->key);
+ /* Remove the intermediate cache file and return non-APR_SUCCESS */
+ apr_pool_destroy(sobj->pool);
+ sobj->pool = NULL;
+ return rv;
+ }
+
+ /* don't write empty buckets to the cache */
+ if (!length) {
+ continue;
+ }
+
+ sobj->file_size += length;
+ if (sobj->file_size >= sobj->buffer_len - sobj->body_offset) {
+ ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(02378)
+ "URL %s failed the buffer size check "
+ "(%" APR_OFF_T_FMT ">=%" APR_SIZE_T_FMT ")",
+ h->cache_obj->key, sobj->file_size, sobj->buffer_len - sobj->body_offset);
+ apr_pool_destroy(sobj->pool);
+ sobj->pool = NULL;
+ return APR_EGENERAL;
+ }
+
+ rv = apr_bucket_copy(e, &e);
+ if (rv != APR_SUCCESS) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(02379)
+ "Error when copying bucket for URL %s",
+ h->cache_obj->key);
+ apr_pool_destroy(sobj->pool);
+ sobj->pool = NULL;
+ return rv;
+ }
+ APR_BRIGADE_INSERT_TAIL(sobj->body, e);
+
+ /* 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.
+ */
+ sobj->offset -= length;
+ if (sobj->offset <= 0) {
+ sobj->offset = 0;
+ break;
+ }
+ if ((dconf->readtime && apr_time_now() > sobj->timeout)) {
+ sobj->timeout = 0;
+ break;
+ }
+
+ }
+
+ /* Was this the final bucket? If yes, perform sanity checks.
+ */
+ if (seen_eos) {
+ const char *cl_header = apr_table_get(r->headers_out, "Content-Length");
+
+ if (r->connection->aborted || r->no_cache) {
+ ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r, APLOGNO(02380)
+ "Discarding body for URL %s "
+ "because connection has been aborted.",
+ h->cache_obj->key);
+ apr_pool_destroy(sobj->pool);
+ sobj->pool = NULL;
+ return APR_EGENERAL;
+ }
+ if (cl_header) {
+ apr_int64_t cl = apr_atoi64(cl_header);
+ if ((errno == 0) && (sobj->file_size != cl)) {
+ ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(02381)
+ "URL %s didn't receive complete response, not caching",
+ h->cache_obj->key);
+ apr_pool_destroy(sobj->pool);
+ sobj->pool = NULL;
+ 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)
+{
+ cache_socache_conf *conf = ap_get_module_config(r->server->module_config,
+ &cache_socache_module);
+ cache_object_t *obj = h->cache_obj;
+ cache_socache_object_t *sobj = (cache_socache_object_t *) obj->vobj;
+ apr_status_t rv;
+ apr_size_t len;
+
+ /* flatten the body into the buffer */
+ len = sobj->buffer_len - sobj->body_offset;
+ rv = apr_brigade_flatten(sobj->body, (char *) sobj->buffer
+ + sobj->body_offset, &len);
+ if (APR_SUCCESS != rv) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(02382)
+ "could not flatten brigade, not caching: %s",
+ sobj->key);
+ goto fail;
+ }
+ if (len >= sobj->buffer_len - sobj->body_offset) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(02383)
+ "body too big for the cache buffer, not caching: %s",
+ h->cache_obj->key);
+ goto fail;
+ }
+
+ if (socache_mutex) {
+ apr_status_t status = apr_global_mutex_lock(socache_mutex);
+ if (status != APR_SUCCESS) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, status, r, APLOGNO(02384)
+ "could not acquire lock, ignoring: %s", obj->key);
+ apr_pool_destroy(sobj->pool);
+ sobj->pool = NULL;
+ return rv;
+ }
+ }
+ rv = conf->provider->socache_provider->store(
+ conf->provider->socache_instance, r->server,
+ (unsigned char *) sobj->key, strlen(sobj->key), sobj->expire,
+ sobj->buffer, (unsigned int) sobj->body_offset + len, sobj->pool);
+ if (socache_mutex) {
+ apr_status_t status = apr_global_mutex_unlock(socache_mutex);
+ if (status != APR_SUCCESS) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, status, r, APLOGNO(02385)
+ "could not release lock, ignoring: %s", obj->key);
+ apr_pool_destroy(sobj->pool);
+ sobj->pool = NULL;
+ return DECLINED;
+ }
+ }
+ if (rv != APR_SUCCESS) {
+ ap_log_rerror(APLOG_MARK, APLOG_WARNING, rv, r, APLOGNO(02386)
+ "could not write to cache, ignoring: %s", sobj->key);
+ goto fail;
+ }
+
+ ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(02387)
+ "commit_entity: Headers and body for URL %s cached for maximum of %d seconds.",
+ sobj->name, (apr_uint32_t)apr_time_sec(sobj->expire - r->request_time));
+
+ apr_pool_destroy(sobj->pool);
+ sobj->pool = NULL;
+
+ return APR_SUCCESS;
+
+fail:
+ /* For safety, remove any existing entry on failure, just in case it could not
+ * be revalidated successfully.
+ */
+ if (socache_mutex) {
+ apr_status_t status = apr_global_mutex_lock(socache_mutex);
+ if (status != APR_SUCCESS) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, status, r, APLOGNO(02388)
+ "could not acquire lock, ignoring: %s", obj->key);
+ apr_pool_destroy(sobj->pool);
+ sobj->pool = NULL;
+ return rv;
+ }
+ }
+ conf->provider->socache_provider->remove(conf->provider->socache_instance,
+ r->server, (unsigned char *) sobj->key, strlen(sobj->key), r->pool);
+ if (socache_mutex) {
+ apr_status_t status = apr_global_mutex_unlock(socache_mutex);
+ if (status != APR_SUCCESS) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, status, r, APLOGNO(02389)
+ "could not release lock, ignoring: %s", obj->key);
+ }
+ }
+
+ apr_pool_destroy(sobj->pool);
+ sobj->pool = NULL;
+ return rv;
+}
+
+static apr_status_t invalidate_entity(cache_handle_t *h, request_rec *r)
+{
+ return APR_ENOTIMPL;
+}
+
+static void *create_dir_config(apr_pool_t *p, char *dummy)
+{
+ cache_socache_dir_conf *dconf =
+ apr_pcalloc(p, sizeof(cache_socache_dir_conf));
+
+ dconf->max = DEFAULT_MAX_FILE_SIZE;
+ dconf->maxtime = apr_time_from_sec(DEFAULT_MAXTIME);
+ dconf->mintime = apr_time_from_sec(DEFAULT_MINTIME);
+ dconf->readsize = DEFAULT_READSIZE;
+ dconf->readtime = DEFAULT_READTIME;
+
+ return dconf;
+}
+
+static void *merge_dir_config(apr_pool_t *p, void *basev, void *addv)
+{
+ cache_socache_dir_conf
+ *new =
+ (cache_socache_dir_conf *) apr_pcalloc(p, sizeof(cache_socache_dir_conf));
+ cache_socache_dir_conf *add = (cache_socache_dir_conf *) addv;
+ cache_socache_dir_conf *base = (cache_socache_dir_conf *) basev;
+
+ new->max = (add->max_set == 0) ? base->max : add->max;
+ new->max_set = add->max_set || base->max_set;
+ new->maxtime = (add->maxtime_set == 0) ? base->maxtime : add->maxtime;
+ new->maxtime_set = add->maxtime_set || base->maxtime_set;
+ new->mintime = (add->mintime_set == 0) ? base->mintime : add->mintime;
+ new->mintime_set = add->mintime_set || base->mintime_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)
+{
+ cache_socache_conf *conf = apr_pcalloc(p, sizeof(cache_socache_conf));
+
+ return conf;
+}
+
+static void *merge_config(apr_pool_t *p, void *basev, void *overridesv)
+{
+ cache_socache_conf *ps = apr_pcalloc(p, sizeof(cache_socache_conf));
+ cache_socache_conf *base = (cache_socache_conf *) basev;
+ cache_socache_conf *overrides = (cache_socache_conf *) overridesv;
+
+ ps = overrides ? overrides : base;
+
+ return ps;
+}
+
+/*
+ * mod_cache_socache configuration directives handlers.
+ */
+static const char *set_cache_socache(cmd_parms *cmd, void *in_struct_ptr,
+ const char *arg)
+{
+ cache_socache_conf *conf = ap_get_module_config(cmd->server->module_config,
+ &cache_socache_module);
+ cache_socache_provider_conf *provider = conf->provider
+ = apr_pcalloc(cmd->pool, sizeof(cache_socache_provider_conf));
+
+ const char *err = NULL, *sep, *name;
+
+ /* Argument is of form 'name:args' or just 'name'. */
+ sep = ap_strchr_c(arg, ':');
+ if (sep) {
+ name = apr_pstrmemdup(cmd->pool, arg, sep - arg);
+ sep++;
+ provider->args = sep;
+ }
+ else {
+ name = arg;
+ }
+
+ provider->socache_provider = ap_lookup_provider(AP_SOCACHE_PROVIDER_GROUP,
+ arg, AP_SOCACHE_PROVIDER_VERSION);
+ if (provider->socache_provider == NULL) {
+ err = apr_psprintf(cmd->pool,
+ "Unknown socache provider '%s'. Maybe you need "
+ "to load the appropriate socache module "
+ "(mod_socache_%s?)", name, name);
+ }
+ return err;
+}
+
+static const char *set_cache_max(cmd_parms *parms, void *in_struct_ptr,
+ const char *arg)
+{
+ cache_socache_dir_conf *dconf = (cache_socache_dir_conf *) in_struct_ptr;
+
+ if (apr_strtoff(&dconf->max, arg, NULL, 10) != APR_SUCCESS || dconf->max
+ < 1024) {
+ return "CacheSocacheMaxSize argument must be a integer representing the max size of a cached entry (headers and body), at least 1024";
+ }
+ return NULL;
+}
+
+static const char *set_cache_maxtime(cmd_parms *parms, void *in_struct_ptr,
+ const char *arg)
+{
+ cache_socache_dir_conf *dconf = (cache_socache_dir_conf *) in_struct_ptr;
+ apr_off_t seconds;
+
+ if (apr_strtoff(&seconds, arg, NULL, 10) != APR_SUCCESS || seconds < 0) {
+ return "CacheSocacheMaxTime argument must be the maximum amount of time in seconds to cache an entry.";
+ }
+ dconf->maxtime = apr_time_from_sec(seconds);
+ dconf->maxtime_set = 1;
+ return NULL;
+}
+
+static const char *set_cache_mintime(cmd_parms *parms, void *in_struct_ptr,
+ const char *arg)
+{
+ cache_socache_dir_conf *dconf = (cache_socache_dir_conf *) in_struct_ptr;
+ apr_off_t seconds;
+
+ if (apr_strtoff(&seconds, arg, NULL, 10) != APR_SUCCESS || seconds < 0) {
+ return "CacheSocacheMinTime argument must be the minimum amount of time in seconds to cache an entry.";
+ }
+ dconf->mintime = apr_time_from_sec(seconds);
+ dconf->mintime_set = 1;
+ return NULL;
+}
+
+static const char *set_cache_readsize(cmd_parms *parms, void *in_struct_ptr,
+ const char *arg)
+{
+ cache_socache_dir_conf *dconf = (cache_socache_dir_conf *) in_struct_ptr;
+
+ if (apr_strtoff(&dconf->readsize, arg, NULL, 10) != APR_SUCCESS
+ || dconf->readsize < 0) {
+ return "CacheSocacheReadSize 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)
+{
+ cache_socache_dir_conf *dconf = (cache_socache_dir_conf *) in_struct_ptr;
+ apr_off_t milliseconds;
+
+ if (apr_strtoff(&milliseconds, arg, NULL, 10) != APR_SUCCESS
+ || milliseconds < 0) {
+ return "CacheSocacheReadTime 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 apr_status_t remove_lock(void *data)
+{
+ if (socache_mutex) {
+ apr_global_mutex_destroy(socache_mutex);
+ socache_mutex = NULL;
+ }
+ return APR_SUCCESS;
+}
+
+static apr_status_t destroy_cache(void *data)
+{
+ server_rec *s = data;
+ cache_socache_conf *conf =
+ ap_get_module_config(s->module_config, &cache_socache_module);
+ if (conf->provider && conf->provider->socache_instance) {
+ conf->provider->socache_provider->destroy(
+ conf->provider->socache_instance, s);
+ conf->provider->socache_instance = NULL;
+ }
+ return APR_SUCCESS;
+}
+
+static int socache_precfg(apr_pool_t *pconf, apr_pool_t *plog, apr_pool_t *ptmp)
+{
+ apr_status_t rv = ap_mutex_register(pconf, cache_socache_id, NULL,
+ APR_LOCK_DEFAULT, 0);
+ if (rv != APR_SUCCESS) {
+ ap_log_perror(APLOG_MARK, APLOG_CRIT, rv, plog, APLOGNO(02390)
+ "failed to register %s mutex", cache_socache_id);
+ return 500; /* An HTTP status would be a misnomer! */
+ }
+ return OK;
+}
+
+static int socache_post_config(apr_pool_t *pconf, apr_pool_t *plog,
+ apr_pool_t *ptmp, server_rec *base_server)
+{
+ server_rec *s;
+ apr_status_t rv;
+ const char *errmsg;
+ static struct ap_socache_hints socache_hints =
+ { 64, 32, 60000000 };
+
+ for (s = base_server; s; s = s->next) {
+ cache_socache_conf *conf =
+ ap_get_module_config(s->module_config, &cache_socache_module);
+
+ if (!conf->provider) {
+ continue;
+ }
+
+ if (!socache_mutex && conf->provider->socache_provider->flags
+ & AP_SOCACHE_FLAG_NOTMPSAFE) {
+
+ rv = ap_global_mutex_create(&socache_mutex, NULL, cache_socache_id,
+ NULL, s, pconf, 0);
+ if (rv != APR_SUCCESS) {
+ ap_log_perror(APLOG_MARK, APLOG_CRIT, rv, plog, APLOGNO(02391)
+ "failed to create %s mutex", cache_socache_id);
+ return 500; /* An HTTP status would be a misnomer! */
+ }
+ apr_pool_cleanup_register(pconf, NULL, remove_lock,
+ apr_pool_cleanup_null);
+ }
+
+ errmsg = conf->provider->socache_provider->create(
+ &conf->provider->socache_instance, conf->provider->args, ptmp,
+ pconf);
+ if (errmsg) {
+ ap_log_perror(APLOG_MARK, APLOG_CRIT, rv, plog,
+ APLOGNO(02392) "%s", errmsg);
+ return 500; /* An HTTP status would be a misnomer! */
+ }
+
+ rv = conf->provider->socache_provider->init(
+ conf->provider->socache_instance, cache_socache_id,
+ &socache_hints, s, pconf);
+ if (rv != APR_SUCCESS) {
+ ap_log_perror(APLOG_MARK, APLOG_CRIT, rv, plog, APLOGNO(02393)
+ "failed to initialise %s cache", cache_socache_id);
+ return 500; /* An HTTP status would be a misnomer! */
+ }
+ apr_pool_cleanup_register(pconf, (void *) s, destroy_cache,
+ apr_pool_cleanup_null);
+
+ }
+
+ return OK;
+}
+
+static void socache_child_init(apr_pool_t *p, server_rec *s)
+{
+ const char *lock;
+ apr_status_t rv;
+ if (!socache_mutex) {
+ return; /* don't waste the overhead of creating mutex & cache */
+ }
+ lock = apr_global_mutex_lockfile(socache_mutex);
+ rv = apr_global_mutex_child_init(&socache_mutex, lock, p);
+ if (rv != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, rv, s, APLOGNO(02394)
+ "failed to initialise mutex in child_init");
+ }
+}
+
+static const command_rec cache_socache_cmds[] =
+{
+ AP_INIT_TAKE1("CacheSocache", set_cache_socache, NULL, RSRC_CONF,
+ "The shared object cache to store cache files"),
+ AP_INIT_TAKE1("CacheSocacheMaxTime", set_cache_maxtime, NULL, RSRC_CONF | ACCESS_CONF,
+ "The maximum cache expiry age to cache a document in seconds"),
+ AP_INIT_TAKE1("CacheSocacheMinTime", set_cache_mintime, NULL, RSRC_CONF | ACCESS_CONF,
+ "The minimum cache expiry age to cache a document in seconds"),
+ AP_INIT_TAKE1("CacheSocacheMaxSize", set_cache_max, NULL, RSRC_CONF | ACCESS_CONF,
+ "The maximum cache entry size (headers and body) to cache a document"),
+ AP_INIT_TAKE1("CacheSocacheReadSize", 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("CacheSocacheReadTime", 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_socache_provider =
+{
+ &remove_entity, &store_headers, &store_body, &recall_headers, &recall_body,
+ &create_entity, &open_entity, &remove_url, &commit_entity,
+ &invalidate_entity
+};
+
+static void cache_socache_register_hook(apr_pool_t *p)
+{
+ /* cache initializer */
+ ap_register_provider(p, CACHE_PROVIDER_GROUP, "socache", "0",
+ &cache_socache_provider);
+ ap_hook_pre_config(socache_precfg, NULL, NULL, APR_HOOK_MIDDLE);
+ ap_hook_post_config(socache_post_config, NULL, NULL, APR_HOOK_MIDDLE);
+ ap_hook_child_init(socache_child_init, NULL, NULL, APR_HOOK_MIDDLE);
+}
+
+AP_DECLARE_MODULE(cache_socache) = { 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 */
+ merge_config, /* merge per-server config structures */
+ cache_socache_cmds, /* command apr_table_t */
+ cache_socache_register_hook /* register hooks */
+};
projects / apache / commitdiff