instead of initializing the curl library every time the CURL() function is invoked, do it only once per thread (this allows multiple calls to CURL() in the dialplan for a channel to run much more quickly, and also to re-use connections to the server) (thanks to JerJer for frequently complaining about this performance problem)

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@48513 65c4cc65-6c06-0410-ace0-fbb531ad65f3

funcs/func_curl.c

@@ -51,13 +51,13 @@ ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
 #include "asterisk/module.h"
 #include "asterisk/app.h"
 #include "asterisk/utils.h"
+#include "asterisk/threadstorage.h"
 
 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
@@ -82,32 +82,46 @@ static size_t WriteMemoryCallback(void *ptr, size_t size, size_t nmemb, void *da
 	return realsize;
 }
 
-static int curl_internal(struct MemoryStruct *chunk, char *url, char *post)
+static const char *global_useragent = "asterisk-libcurl-agent/1.0";
+
+static void curl_instance_cleanup(void *data)
 {
-	CURL *curl;
+	CURL **curl = data;
 
-	curl = curl_easy_init();
+	curl_easy_cleanup(*curl);
+}
+
+AST_THREADSTORAGE_CUSTOM(curl_instance, curl_instance_init, curl_instance_cleanup);
 
-	if (!curl) {
+static int curl_internal(struct MemoryStruct *chunk, char *url, char *post)
+{
+	CURL **curl;
+
+	if (!(curl = ast_threadstorage_get(&curl_instance, sizeof(*curl))))
 		return -1;
+
+	if (!*curl) {
+		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);
 	}
 
-	curl_easy_setopt(curl, CURLOPT_NOSIGNAL, 1);
-	curl_easy_setopt(curl, CURLOPT_TIMEOUT, 180);
-	curl_easy_setopt(curl, CURLOPT_FRESH_CONNECT, 1);
-	curl_easy_setopt(curl, CURLOPT_FORBID_REUSE, 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");
+	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_setopt(*curl, CURLOPT_POST, 1);
+		curl_easy_setopt(*curl, CURLOPT_POSTFIELDS, post);
 	}
 
-	curl_easy_perform(curl);
-	curl_easy_cleanup(curl);
+	curl_easy_perform(*curl);
+
+	if (post)
+		curl_easy_setopt(*curl, CURLOPT_POST, 0);
+
 	return 0;
 }