MT#56447 implement GET for Janus protocol

Change-Id: I40e4cc1c2617c49edc3e3dc626d979324da52236

daemon/janus.c

@@ -1646,6 +1646,38 @@ err:
 }
 
 
+const char *websocket_janus_get(struct websocket_message *wm) {
+	str uri;
+	str_init(&uri, wm->uri);
+
+	ilog(LOG_DEBUG, "Processing Janus GET: '%s'", wm->uri);
+
+	JsonBuilder *builder = json_builder_new();
+	json_builder_begin_object(builder); // {
+
+	int retcode = 200;
+	const char *success = "success";
+	const char *err = NULL;
+
+	switch (__csh_lookup(&uri)) {
+		case CSH_LOOKUP("/admin/info"):
+			success = janus_server_info(builder);
+			break;
+
+		default:
+			retcode = 457;
+			err = "Unhandled request method";
+			break;
+	}
+
+	janus_finish_response(builder, success, err, retcode);
+
+	json_builder_end_object(builder); // }
+
+	return janus_send_json_msg(wm, builder, 200, true);
+}
+
+
 void janus_init(void) {
 	mutex_init(&janus_lock);
 	janus_tokens = g_hash_table_new_full(g_str_hash, g_str_equal, g_free, g_free);

daemon/websocket.c

@@ -491,7 +491,7 @@ static int websocket_http_get(struct websocket_conn *wc) {
 	const char *uri = wm->uri;
 	websocket_message_func_t handler = NULL;
 
-	ilogs(http, LOG_INFO, "HTTP GET from %s: '%s'", endpoint_print_buf(&wc->endpoint), wm->uri);
+	ilogs(http, LOG_INFO, "HTTP GET from %s: '%s'", endpoint_print_buf(&wc->endpoint), uri);
 	wm->method = M_GET;
 
 	if (!strcmp(uri, "/ping"))
@@ -500,6 +500,8 @@ static int websocket_http_get(struct websocket_conn *wc) {
 		handler = websocket_http_cli;
 	else if (!strcmp(uri, "/metrics"))
 		handler = websocket_http_metrics;
+	else if (!strncmp(uri, "/admin/", 7))
+		handler = websocket_janus_get;
 
 	if (!handler) {
 		ilogs(http, LOG_WARN, "Unhandled HTTP GET URI: '%s'", uri);

include/janus.h

@@ -11,6 +11,7 @@ void janus_init(void);
 void janus_free(void);
 
 const char *websocket_janus_process(struct websocket_message *wm);
+const char *websocket_janus_get(struct websocket_message *wm);
 void janus_detach_websocket(struct janus_session *session, struct websocket_conn *wc);
 void janus_media_up(struct call_monologue *);