Merge pull request #29 from amorygalili/allow-networktables-to-serve-from-different-host

Allow networktables to serve from different host

Author: virtuald

pynetworktables2js/js/networktables.js

@@ -294,7 +294,17 @@ var NetworkTables = new function () {
 		host = "ws:";
 	}
 
-	host += "//" + loc.host;
+	// If the websocket is being served from a different host allow users 
+	// to add a data-nt-host="" attribute to the script tag loading 
+	// Networktables.
+	var ntHostElement = document.querySelector('[data-nt-host]');
+	if (ntHostElement) {
+		var ntHost = ntHostElement.getAttribute('data-nt-host');
+		host += "//" + ntHost;
+	} else {
+		host += "//" + loc.host;
+	}
+
 	host += "/networktables/ws";
 
 	function createSocket() {

pynetworktables2js/tornado_handlers.py

@@ -26,6 +26,12 @@ def open(self):
         self.ioloop = IOLoop.current()
         self.ntserial = NTSerial(self.send_msg_threadsafe)
 
+    def check_origin(self, origin):
+        """
+            Allow CORS requests
+        """
+        return True
+
     def on_message(self, message):
         if self.ntserial is not None:
             self.ntserial.process_update(message)