diff options
Diffstat (limited to 'trunk/funcs/func_curl.c')
| -rw-r--r-- | trunk/funcs/func_curl.c | 204 |
1 files changed, 204 insertions, 0 deletions
diff --git a/trunk/funcs/func_curl.c b/trunk/funcs/func_curl.c new file mode 100644 index 000000000..32dbf7686 --- /dev/null +++ b/trunk/funcs/func_curl.c @@ -0,0 +1,204 @@ +/* + * Asterisk -- An open source telephony toolkit. + * + * Copyright (C) 2004 - 2006, Tilghman Lesher + * + * Tilghman Lesher <curl-20050919@the-tilghman.com> + * and Brian Wilkins <bwilkins@cfl.rr.com> (Added POST option) + * + * app_curl.c is distributed with no restrictions on usage or + * redistribution. + * + * See http://www.asterisk.org for more information about + * the Asterisk project. Please do not directly contact + * any of the maintainers of this project for assistance; + * the project provides a web site, mailing lists and IRC + * channels for your use. + * + */ + +/*! \file + * + * \brief Curl - Load a URL + * + * \author Tilghman Lesher <curl-20050919@the-tilghman.com> + * + * \note Brian Wilkins <bwilkins@cfl.rr.com> (Added POST option) + * + * \extref Depends on the CURL library - http://curl.haxx.se/ + * + * \ingroup functions + */ + +/*** MODULEINFO + <depend>curl</depend> + ***/ + +#include "asterisk.h" + +ASTERISK_FILE_VERSION(__FILE__, "$Revision$") + +#include <curl/curl.h> + +#include "asterisk/lock.h" +#include "asterisk/file.h" +#include "asterisk/channel.h" +#include "asterisk/pbx.h" +#include "asterisk/cli.h" +#include "asterisk/module.h" +#include "asterisk/app.h" +#include "asterisk/utils.h" +#include "asterisk/threadstorage.h" + +struct MemoryStruct { + char *memory; + size_t size; +}; + +/* There might be a realloc() out there that doesn't like reallocing + * NULL pointers, so we take care of it here + */ +static void *myrealloc(void *ptr, size_t size) +{ + return (ptr ? ast_realloc(ptr, size) : ast_malloc(size)); +} + +static size_t WriteMemoryCallback(void *ptr, size_t size, size_t nmemb, void *data) +{ + register int realsize = size * nmemb; + struct MemoryStruct *mem = (struct MemoryStruct *)data; + + if ((mem->memory = (char *)myrealloc(mem->memory, mem->size + realsize + 1))) { + memcpy(&(mem->memory[mem->size]), ptr, realsize); + mem->size += realsize; + mem->memory[mem->size] = 0; + } + + return realsize; +} + +static const char *global_useragent = "asterisk-libcurl-agent/1.0"; + +static int curl_instance_init(void *data) +{ + CURL **curl = data; + + if (!(*curl = curl_easy_init())) + return -1; + + curl_easy_setopt(*curl, CURLOPT_NOSIGNAL, 1); + curl_easy_setopt(*curl, CURLOPT_TIMEOUT, 180); + curl_easy_setopt(*curl, CURLOPT_WRITEFUNCTION, WriteMemoryCallback); + curl_easy_setopt(*curl, CURLOPT_USERAGENT, global_useragent); + + return 0; +} + +static void curl_instance_cleanup(void *data) +{ + CURL **curl = data; + + curl_easy_cleanup(*curl); +} + +AST_THREADSTORAGE_CUSTOM(curl_instance, curl_instance_init, curl_instance_cleanup); + +static int curl_internal(struct MemoryStruct *chunk, char *url, char *post) +{ + CURL **curl; + + if (!(curl = ast_threadstorage_get(&curl_instance, sizeof(*curl)))) + return -1; + + curl_easy_setopt(*curl, CURLOPT_URL, url); + curl_easy_setopt(*curl, CURLOPT_WRITEDATA, (void *) chunk); + + if (post) { + curl_easy_setopt(*curl, CURLOPT_POST, 1); + curl_easy_setopt(*curl, CURLOPT_POSTFIELDS, post); + } + + curl_easy_perform(*curl); + + if (post) + curl_easy_setopt(*curl, CURLOPT_POST, 0); + + return 0; +} + +static int acf_curl_exec(struct ast_channel *chan, const char *cmd, char *info, char *buf, size_t len) +{ + struct MemoryStruct chunk = { NULL, 0 }; + AST_DECLARE_APP_ARGS(args, + AST_APP_ARG(url); + AST_APP_ARG(postdata); + ); + + *buf = '\0'; + + if (ast_strlen_zero(info)) { + ast_log(LOG_WARNING, "CURL requires an argument (URL)\n"); + return -1; + } + + AST_STANDARD_APP_ARGS(args, info); + + if (chan) + ast_autoservice_start(chan); + + if (!curl_internal(&chunk, args.url, args.postdata)) { + if (chunk.memory) { + chunk.memory[chunk.size] = '\0'; + if (chunk.memory[chunk.size - 1] == 10) + chunk.memory[chunk.size - 1] = '\0'; + + ast_copy_string(buf, chunk.memory, len); + ast_free(chunk.memory); + } + } else { + ast_log(LOG_ERROR, "Cannot allocate curl structure\n"); + } + + if (chan) + ast_autoservice_stop(chan); + + return 0; +} + +struct ast_custom_function acf_curl = { + .name = "CURL", + .synopsis = "Retrieves the contents of a URL", + .syntax = "CURL(url[,post-data])", + .desc = + " url - URL to retrieve\n" + " post-data - Optional data to send as a POST (GET is default action)\n", + .read = acf_curl_exec, +}; + +static int unload_module(void) +{ + int res; + + res = ast_custom_function_unregister(&acf_curl); + + curl_global_cleanup(); + + return res; +} + +static int load_module(void) +{ + int res; + + if (curl_global_init(CURL_GLOBAL_ALL)) { + ast_log(LOG_ERROR, "Unable to initialize the CURL library. Cannot load func_curl\n"); + return AST_MODULE_LOAD_DECLINE; + } + + res = ast_custom_function_register(&acf_curl); + + return res; +} + +AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Load external URL"); + |