Move CURL function from apps/ to funcs/

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@10932 65c4cc65-6c06-0410-ace0-fbb531ad65f3

funcs/func_curl.c

@@ -0,0 +1,193 @@
+/*
+ * 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) 
+ * 
+ * \ingroup functions
+ */
+ 
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <curl/curl.h>
+
+#include "asterisk.h"
+
+ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
+
+#include "asterisk/lock.h"
+#include "asterisk/file.h"
+#include "asterisk/logger.h"
+#include "asterisk/channel.h"
+#include "asterisk/pbx.h"
+#include "asterisk/cli.h"
+#include "asterisk/options.h"
+#include "asterisk/module.h"
+#include "asterisk/app.h"
+#include "asterisk/utils.h"
+
+static char *tdesc = "Load external URL";
+
+LOCAL_USER_DECL;
+
+struct MemoryStruct {
+	char *memory;
+	size_t size;
+};
+
+static void *myrealloc(void *ptr, size_t size)
+{
+	/* There might be a realloc() out there that doesn't like reallocing
+	   NULL pointers, so we take care of it here */
+	if (ptr)
+		return ast_realloc(ptr, size);
+	else
+		return 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;
+
+	mem->memory = (char *)myrealloc(mem->memory, mem->size + realsize + 1);
+	if (mem->memory) {
+		memcpy(&(mem->memory[mem->size]), ptr, realsize);
+		mem->size += realsize;
+		mem->memory[mem->size] = 0;
+	}
+	return realsize;
+}
+
+static int curl_internal(struct MemoryStruct *chunk, char *url, char *post)
+{
+	CURL *curl;
+
+	curl_global_init(CURL_GLOBAL_ALL);
+	curl = curl_easy_init();
+
+	if (!curl) {
+		return -1;
+	}
+
+	curl_easy_setopt(curl, CURLOPT_URL, url);
+	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, WriteMemoryCallback);
+	curl_easy_setopt(curl, CURLOPT_WRITEDATA, (void *)chunk);
+	curl_easy_setopt(curl, CURLOPT_USERAGENT, "asterisk-libcurl-agent/1.0");
+
+	if (post) {
+		curl_easy_setopt(curl, CURLOPT_POST, 1);
+		curl_easy_setopt(curl, CURLOPT_POSTFIELDS, post);
+	}
+
+	curl_easy_perform(curl);
+	curl_easy_cleanup(curl);
+	return 0;
+}
+
+static int acf_curl_exec(struct ast_channel *chan, char *cmd, char *info, char *buf, size_t len)
+{
+	struct localuser *u;
+	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;
+	}
+
+	LOCAL_USER_ADD(u);
+
+	AST_STANDARD_APP_ARGS(args, info);	
+	
+	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);
+			free(chunk.memory);
+		}
+	} else {
+		ast_log(LOG_ERROR, "Cannot allocate curl structure\n");
+	}
+
+	LOCAL_USER_REMOVE(u);
+
+	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,
+};
+
+int unload_module(void)
+{
+	int res;
+
+	res = ast_custom_function_unregister(&acf_curl);
+
+	STANDARD_HANGUP_LOCALUSERS;
+	
+	return res;
+}
+
+int load_module(void)
+{
+	int res;
+
+	res = ast_custom_function_register(&acf_curl);
+
+	return res;
+}
+
+char *description(void)
+{
+	return tdesc;
+}
+
+int usecount(void)
+{
+	int res;
+	STANDARD_USECOUNT(res);
+	return res;
+}
+
+char *key()
+{
+	return ASTERISK_GPL_KEY;
+}