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FS-7323 #resolve #comment [mod_http_cache] added http_remove_cache <url> API call to manually expire a cached URL. 

Added {refresh=true} parameter that can be prefixed to URL to force refresh when using http:// https:// file formats or the http_get API.
Examples:
    http_remove_cache http://phono.com/audio/troporocks.mp3
    http_get {refresh=true}http://phono.com/audio/troporocks.mp3
    <action application="playback" data="{refresh=true}http://phono.com/audio/troporocks.mp3"/>
This commit is contained in:
Chris Rienzo 2015-02-25 09:43:38 -05:00
parent 4909cdb7fb
commit 3cd481820e
1 changed files with 56 additions and 11 deletions
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67
src/mod/applications/mod_http_cache/mod_http_cache.c
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@ -1,6 +1,6 @@
/*
* FreeSWITCH Modular Media Switching Software Library / Soft-Switch Application
* Copyright (C) 2005-2014, Anthony Minessale II <anthm@freeswitch.org>
* Copyright (C) 2005-2015, Anthony Minessale II <anthm@freeswitch.org>
*
* Version: MPL 1.1
*
@ -47,6 +47,7 @@ SWITCH_STANDARD_API(http_cache_get);
SWITCH_STANDARD_API(http_cache_put);
SWITCH_STANDARD_API(http_cache_tryget);
SWITCH_STANDARD_API(http_cache_clear);
SWITCH_STANDARD_API(http_cache_remove);
SWITCH_STANDARD_API(http_cache_prefetch);
#define DOWNLOAD_NEEDED "download"
@ -192,7 +193,7 @@ struct url_cache {
};
static url_cache_t gcache;
static char *url_cache_get(url_cache_t *cache, http_profile_t *profile, switch_core_session_t *session, const char *url, int download, switch_memory_pool_t *pool);
static char *url_cache_get(url_cache_t *cache, http_profile_t *profile, switch_core_session_t *session, const char *url, int download, int refresh, switch_memory_pool_t *pool);
static switch_status_t url_cache_add(url_cache_t *cache, switch_core_session_t *session, cached_url_t *url);
static void url_cache_remove(url_cache_t *cache, switch_core_session_t *session, cached_url_t *url);
static void url_cache_remove_soft(url_cache_t *cache, switch_core_session_t *session, cached_url_t *url);
@ -574,10 +575,11 @@ static void url_cache_clear(url_cache_t *cache, switch_core_session_t *session)
* @param session the (optional) session requesting the URL
* @param url The URL
* @param download If true, the file will be downloaded if it does not exist in the cache.
* @param refresh If true, existing cache entry is invalidated
* @param pool The pool to use for allocating the filename
* @return The filename or NULL if there is an error
*/
static char *url_cache_get(url_cache_t *cache, http_profile_t *profile, switch_core_session_t *session, const char *url, int download, switch_memory_pool_t *pool)
static char *url_cache_get(url_cache_t *cache, http_profile_t *profile, switch_core_session_t *session, const char *url, int download, int refresh, switch_memory_pool_t *pool)
{
char *filename = NULL;
cached_url_t *u = NULL;
@ -597,6 +599,10 @@ static char *url_cache_get(url_cache_t *cache, http_profile_t *profile, switch_c
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_INFO, "Cached URL file is missing.\n");
url_cache_remove_soft(cache, session, u); /* will get permanently deleted upon replacement */
u = NULL;
} else if (refresh) {
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_INFO, "Cached URL manually expired.\n");
url_cache_remove_soft(cache, session, u); /* will get permanently deleted upon replacement */
u = NULL;
}
}
@ -1122,7 +1128,7 @@ SWITCH_STANDARD_API(http_cache_get)
profile = url_cache_http_profile_find(&gcache, switch_event_get_header(params, "profile"));
}
filename = url_cache_get(&gcache, profile, session, url, 1, pool);
filename = url_cache_get(&gcache, profile, session, url, 1, params ? switch_true(switch_event_get_header(params, "refresh")) : SWITCH_FALSE, pool);
if (filename) {
stream->write_function(stream, "%s", filename);
@ -1151,7 +1157,6 @@ SWITCH_STANDARD_API(http_cache_tryget)
switch_status_t status = SWITCH_STATUS_SUCCESS;
switch_memory_pool_t *lpool = NULL;
switch_memory_pool_t *pool = NULL;
http_profile_t *profile = NULL;
char *filename;
switch_event_t *params = NULL;
char *url;
@ -1168,16 +1173,13 @@ SWITCH_STANDARD_API(http_cache_tryget)
pool = lpool;
}
/* parse params and get profile */
/* parse params */
url = switch_core_strdup(pool, cmd);
if (*url == '{') {
switch_event_create_brackets(url, '{', '}', ',', &params, &url, SWITCH_FALSE);
}
if (params) {
profile = url_cache_http_profile_find(&gcache, switch_event_get_header(params, "profile"));
}
filename = url_cache_get(&gcache, profile, session, url, 0, pool);
filename = url_cache_get(&gcache, NULL, session, url, 0, params ? switch_true(switch_event_get_header(params, "refresh")) : SWITCH_FALSE, pool);
if (filename) {
if (!strcmp(DOWNLOAD_NEEDED, filename)) {
stream->write_function(stream, "-ERR %s\n", DOWNLOAD_NEEDED);
@ -1282,6 +1284,48 @@ SWITCH_STANDARD_API(http_cache_clear)
return SWITCH_STATUS_SUCCESS;
}
#define HTTP_CACHE_REMOVE_SYNTAX "<url>"
/**
* Invalidate a cached URL
*/
SWITCH_STANDARD_API(http_cache_remove)
{
switch_memory_pool_t *lpool = NULL;
switch_memory_pool_t *pool = NULL;
switch_event_t *params = NULL;
char *url;
if (zstr(cmd)) {
stream->write_function(stream, "USAGE: %s\n", HTTP_CACHE_REMOVE_SYNTAX);
return SWITCH_STATUS_SUCCESS;
}
if (session) {
pool = switch_core_session_get_pool(session);
} else {
switch_core_new_memory_pool(&lpool);
pool = lpool;
}
/* parse params */
url = switch_core_strdup(pool, cmd);
if (*url == '{') {
switch_event_create_brackets(url, '{', '}', ',', &params, &url, SWITCH_FALSE);
}
url_cache_get(&gcache, NULL, session, url, 0, 1, pool);
stream->write_function(stream, "+OK\n");
if (lpool) {
switch_core_destroy_memory_pool(&lpool);
}
if (params) {
switch_event_destroy(&params);
}
return SWITCH_STATUS_SUCCESS;
}
/**
* Thread to prefetch URLs
@ -1524,7 +1568,7 @@ static switch_status_t http_cache_file_open(switch_file_handle_t *handle, const
} else {
/* READ = HTTP GET */
file_flags |= SWITCH_FILE_FLAG_READ;
context->local_path = url_cache_get(&gcache, context->profile, NULL, path, 1, handle->memory_pool);
context->local_path = url_cache_get(&gcache, context->profile, NULL, path, 1, handle->params ? switch_true(switch_event_get_header(handle->params, "refresh")) : 0, handle->memory_pool);
if (!context->local_path) {
return SWITCH_STATUS_FALSE;
}
@ -1647,6 +1691,7 @@ SWITCH_MODULE_LOAD_FUNCTION(mod_http_cache_load)
SWITCH_ADD_API(api, "http_tryget", "HTTP GET from cache only", http_cache_tryget, HTTP_GET_SYNTAX);
SWITCH_ADD_API(api, "http_put", "HTTP PUT", http_cache_put, HTTP_PUT_SYNTAX);
SWITCH_ADD_API(api, "http_clear_cache", "Clear the cache", http_cache_clear, HTTP_CACHE_CLEAR_SYNTAX);
SWITCH_ADD_API(api, "http_remove_cache", "Remove URL from cache", http_cache_remove, HTTP_CACHE_REMOVE_SYNTAX);
SWITCH_ADD_API(api, "http_prefetch", "Prefetch document in a background thread. Use http_get to get the prefetched document", http_cache_prefetch, HTTP_PREFETCH_SYNTAX);
memset(&gcache, 0, sizeof(url_cache_t));