asterisk: Add macro for curl user agent.

Currently, each module that uses libcurl duplicates the standard
Asterisk curl user agent.

This adds a global macro for the Asterisk user agent used for
curl requests to eliminate this duplication.

ASTERISK-29861 #close

Change-Id: I9fc37935980384b4daf96ae54fa3c9adb962ed2d

funcs/func_curl.c

@@ -600,8 +600,6 @@ static size_t WriteMemoryCallback(void *ptr, size_t size, size_t nmemb, void *da
 	return realsize;
 }
 
-static const char * const global_useragent = "asterisk-libcurl-agent/1.0";
-
 static int curl_instance_init(void *data)
 {
 	CURL **curl = data;
@@ -612,7 +610,7 @@ static int curl_instance_init(void *data)
 	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_USERAGENT, AST_CURL_USER_AGENT);
 
 	return 0;
 }

include/asterisk.h

@@ -41,6 +41,8 @@
 #endif
 
 
+#define AST_CURL_USER_AGENT "asterisk-libcurl-agent/1.0"
+
 #define DEFAULT_LANGUAGE "en"
 
 #define DEFAULT_SAMPLE_RATE 8000

res/res_http_media_cache.c

@@ -42,8 +42,6 @@
 #include "asterisk/threadstorage.h"
 #include "asterisk/uri.h"
 
-#define GLOBAL_USERAGENT "asterisk-libcurl-agent/1.0"
-
 #define MAX_HEADER_LENGTH 1023
 
 /*! \brief Data passed to cURL callbacks */
@@ -338,7 +336,7 @@ static CURL *get_curl_instance(struct curl_bucket_file_data *cb_data)
 	curl_easy_setopt(curl, CURLOPT_NOSIGNAL, 1);
 	curl_easy_setopt(curl, CURLOPT_TIMEOUT, 180);
 	curl_easy_setopt(curl, CURLOPT_HEADERFUNCTION, curl_header_callback);
-	curl_easy_setopt(curl, CURLOPT_USERAGENT, GLOBAL_USERAGENT);
+	curl_easy_setopt(curl, CURLOPT_USERAGENT, AST_CURL_USER_AGENT);
 	curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1);
 	curl_easy_setopt(curl, CURLOPT_MAXREDIRS, 8);
 	curl_easy_setopt(curl, CURLOPT_URL, ast_sorcery_object_get_id(cb_data->bucket_file));

res/res_stir_shaken/curl.c

@@ -31,9 +31,6 @@
 /* Used to check CURL headers */
 #define MAX_HEADER_LENGTH 1023
 
-/* Used for CURL requests */
-#define GLOBAL_USERAGENT "asterisk-libcurl-agent/1.0"
-
 /* CURL callback data to avoid storing useless info in AstDB */
 struct curl_cb_data {
 	char *cache_control;
@@ -144,7 +141,7 @@ static CURL *get_curl_instance(struct curl_cb_data *data)
 
 	curl_easy_setopt(curl, CURLOPT_NOSIGNAL, 1);
 	curl_easy_setopt(curl, CURLOPT_TIMEOUT, curl_timeout);
-	curl_easy_setopt(curl, CURLOPT_USERAGENT, GLOBAL_USERAGENT);
+	curl_easy_setopt(curl, CURLOPT_USERAGENT, AST_CURL_USER_AGENT);
 	curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1);
 	curl_easy_setopt(curl, CURLOPT_HEADERFUNCTION, curl_header_callback);
 	curl_easy_setopt(curl, CURLOPT_HEADERDATA, data);