res_ari: Correct Location headers returned by some ARI resources

The Location headers returned by:

 * /bridges/{bridgeId}/play
 * /bridges/{bridgeId}/record
 * /channels/{channelId}/play
 * /channels/{channelId}/record

Did not have the '/ari' prefix, and in the case of the 'play' resources, were
using 'playback' instead of 'playbacks.'

Change-Id: I957c58a3a1471bf477dae7c67faa1b74fcd9241c

res/ari/resource_bridges.c

@@ -381,7 +381,7 @@ static int ari_bridges_play_helper(const char *args_media,
 		return -1;
 	}
 
-	if (ast_asprintf(playback_url, "/playback/%s",
+	if (ast_asprintf(playback_url, "/playbacks/%s",
 			stasis_app_playback_get_id(playback)) == -1) {
 		playback_url = NULL;
 		ast_ari_response_alloc_failed(response);

res/ari/resource_channels.c

@@ -524,7 +524,7 @@ static void ari_channels_handle_play(
 		return;
 	}
 
-	if (ast_asprintf(&playback_url, "/playback/%s",
+	if (ast_asprintf(&playback_url, "/playbacks/%s",
 			stasis_app_playback_get_id(playback)) == -1) {
 		playback_url = NULL;
 		ast_ari_response_error(

res/res_ari.c

@@ -304,10 +304,11 @@ void ast_ari_response_alloc_failed(struct ast_ari_response *response)
 void ast_ari_response_created(struct ast_ari_response *response,
 	const char *url, struct ast_json *message)
 {
+	RAII_VAR(struct stasis_rest_handlers *, root, get_root_handler(), ao2_cleanup);
 	response->message = message;
 	response->response_code = 201;
 	response->response_text = "Created";
-	ast_str_append(&response->headers, 0, "Location: %s\r\n", url);
+	ast_str_append(&response->headers, 0, "Location: /%s%s\r\n", root->path_segment, url);
 }
 
 static void add_allow_header(struct stasis_rest_handlers *handler,