topic WebSocket connection to '{mashup url}' failed: Error during WebSocket handshake: Unexpected response code: 500 in Integration, Extension & APIs

WebSocket connection to '{mashup url}' failed: Error during WebSocket handshake: Unexpected response code: 500

Tue, 17 Jan 2017 11:17:58 GMT

Hello,

I'm using the On-Demand-App-Gen type extension in a Mashup.

The Extension copies a Template App, and modifies its script based on some logic.

To do that, it creates a newAppSession , and it throws the error.

WebSocket connection to '{mashup url}' failed: Error during WebSocket handshake: Unexpected response code: 500

newAppSession = RPCSession.get(PrevId, {

host: window.location.host,

isSecure: window.location.protocol == "https:"

});

newAppSession.open(true);

The same extension works well in QlikSense report, but fails in mashup.

Is there a limitation of mashup, that we cannot create a new Session.

Could you please help me here.

Alexander_Thor — Tue, 17 Jan 2017 17:46:15 GMT

Are you running any special virtual proxy prefixes? Based on the config it seems to be the default one ( / ).
Is the user authenticated?

If you check the network tab in devtools, does the websocket url look correct?

Wed, 18 Jan 2017 09:30:00 GMT

I chekced the websocket url and it was wrong.

It had taken prefix as 'extension' (I think because it was running in mashups),

so I specified the prefix as '/' and it worked.

newAppSession = RPCSession.get(newAppId, {

host: window.location.host,

prefix:"/",

isSecure: window.location.protocol == "https:"

});

Thanks,

Wasi