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FS-7106 #resolve Fix concurrency issue

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This commit is contained in:
Brian West 2014-12-30 09:06:32 -06:00
parent bf5210bf72
commit 1965b3b18d
1 changed files with 30 additions and 22 deletions
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52
src/mod/applications/mod_httapi/mod_httapi.c
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@ -149,6 +149,8 @@ static struct {
hash_node_t *hash_root;
hash_node_t *hash_tail;
switch_hash_t *profile_hash;
switch_hash_t *request_hash;
switch_mutex_t *request_mutex;
switch_hash_t *parse_hash;
char cache_path[128];
int debug;
@ -170,7 +172,6 @@ struct http_file_context {
char *cache_file;
char *cache_file_base;
char *meta_file;
char *lock_file;
char *metadata;
time_t expires;
switch_file_t *lock_fd;
@ -192,6 +193,8 @@ struct http_file_context {
char *name;
char uuid_str[SWITCH_UUID_FORMATTED_LENGTH + 1];
} write;
switch_mutex_t *mutex;
};
typedef struct http_file_context http_file_context_t;
@ -2381,7 +2384,6 @@ static char *load_cache_data(http_file_context_t *context, const char *url)
context->cache_file_base = switch_core_sprintf(context->pool, "%s%s%s", globals.cache_path, SWITCH_PATH_SEPARATOR, digest);
context->meta_file = switch_core_sprintf(context->pool, "%s%s%s.meta", globals.cache_path, SWITCH_PATH_SEPARATOR, digest);
context->lock_file = switch_core_sprintf(context->pool, "%s%s%s.lock", globals.cache_path, SWITCH_PATH_SEPARATOR, digest);
if (switch_file_exists(context->meta_file, context->pool) == SWITCH_STATUS_SUCCESS && ((fd = open(context->meta_file, O_RDONLY, 0)) > -1)) {
if ((bytes = read(fd, meta_buffer, sizeof(meta_buffer))) > 0) {
@ -2703,27 +2705,29 @@ static switch_status_t lock_file(http_file_context_t *context, switch_bool_t loc
{
switch_status_t status = SWITCH_STATUS_SUCCESS;
http_file_context_t *xcontext = NULL;
if (lock) {
if (switch_file_open(&context->lock_fd,
context->lock_file,
SWITCH_FOPEN_WRITE | SWITCH_FOPEN_CREATE | SWITCH_FOPEN_TRUNCATE,
SWITCH_FPROT_UREAD | SWITCH_FPROT_UWRITE, context->pool) != SWITCH_STATUS_SUCCESS) {
return SWITCH_STATUS_FALSE;
switch_mutex_lock(globals.request_mutex);
if (!(xcontext = switch_core_hash_find(globals.request_hash, context->dest_url))) {
switch_core_hash_insert(globals.request_hash, context->dest_url, context);
xcontext = context;
}
switch_mutex_lock(context->mutex);
switch_mutex_unlock(globals.request_mutex);
if (switch_file_lock(context->lock_fd, SWITCH_FLOCK_EXCLUSIVE) != SWITCH_STATUS_SUCCESS) {
return SWITCH_STATUS_FALSE;
if (context != xcontext) {
switch_mutex_lock(xcontext->mutex);
switch_mutex_unlock(xcontext->mutex);
}
} else {
if (context->lock_fd){
switch_file_close(context->lock_fd);
status = SWITCH_STATUS_SUCCESS;
switch_mutex_lock(globals.request_mutex);
if ((xcontext = switch_core_hash_find(globals.request_hash, context->dest_url)) && xcontext == context) {
switch_core_hash_delete(globals.request_hash, context->dest_url);
}
unlink(context->lock_file);
switch_mutex_unlock(context->mutex);
switch_mutex_unlock(globals.request_mutex);
}
return status;
@ -2745,8 +2749,6 @@ static switch_status_t locate_url_file(http_file_context_t *context, const char
return SWITCH_STATUS_SUCCESS;
}
lock_file(context, SWITCH_TRUE);
if (context->url_params) {
ext = switch_event_get_header(context->url_params, "ext");
}
@ -2837,8 +2839,6 @@ static switch_status_t locate_url_file(http_file_context_t *context, const char
unlink(context->cache_file);
}
lock_file(context, SWITCH_FALSE);
switch_event_destroy(&headers);
return status;
@ -2875,6 +2875,7 @@ static switch_status_t file_open(switch_file_handle_t *handle, const char *path,
context = switch_core_alloc(handle->memory_pool, sizeof(*context));
context->pool = handle->memory_pool;
switch_mutex_init(&context->mutex, SWITCH_MUTEX_NESTED, handle->memory_pool);
pdup = switch_core_strdup(context->pool, pa);
@ -2953,10 +2954,14 @@ static switch_status_t file_open(switch_file_handle_t *handle, const char *path,
context->read.ext = switch_event_get_header(context->url_params, "ext");
}
lock_file(context, SWITCH_TRUE);
if ((status = locate_url_file(context, context->dest_url)) != SWITCH_STATUS_SUCCESS) {
return status;
}
lock_file(context, SWITCH_FALSE);
if ((status = switch_core_file_open(&context->fh,
context->cache_file,
handle->channels,
@ -2965,7 +2970,6 @@ static switch_status_t file_open(switch_file_handle_t *handle, const char *path,
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Invalid cache file %s opening url %s Discarding file.\n", context->cache_file, path);
unlink(context->cache_file);
unlink(context->meta_file);
unlink(context->lock_file);
return status;
}
}
@ -3001,6 +3005,9 @@ static switch_status_t http_file_file_close(switch_file_handle_t *handle)
{
http_file_context_t *context = handle->private_info;
switch_mutex_lock(context->mutex);
switch_mutex_unlock(context->mutex);
if (switch_test_flag((&context->fh), SWITCH_FILE_OPEN)) {
switch_core_file_close(&context->fh);
}
@ -3041,7 +3048,6 @@ static switch_status_t http_file_file_close(switch_file_handle_t *handle)
if (context->cache_file) {
unlink(context->cache_file);
unlink(context->meta_file);
unlink(context->lock_file);
}
}
@ -3105,6 +3111,7 @@ SWITCH_MODULE_LOAD_FUNCTION(mod_httapi_load)
globals.cache_ttl = 300;
globals.not_found_expires = 300;
switch_mutex_init(&globals.request_mutex, SWITCH_MUTEX_NESTED, pool);
http_file_supported_formats[0] = "http";
@ -3133,6 +3140,7 @@ SWITCH_MODULE_LOAD_FUNCTION(mod_httapi_load)
switch_core_hash_init(&globals.profile_hash);
switch_core_hash_init(&globals.request_hash);
switch_core_hash_init_case(&globals.parse_hash, SWITCH_FALSE);
bind_parser("execute", parse_execute);