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TypeError: Cannot read property 'length' of null

See original GitHub issue

I am getting this issue in session when i travel from one specific page to other, what can be the reason behind it

_http_outgoing.js:138

      this.outputSize += this._header.length;
                                         ^

TypeError: Cannot read property ‘length’ of null at ServerResponse.OutgoingMessage._send (_http_outgoing.js:138:38) at ServerResponse.OutgoingMessage.write (_http_outgoing.js:492:16) at ServerResponse.OutgoingMessage.end (_http_outgoing.js:589:10) at writeend (/home/…/my_app/node_modules/express-session/index.js:261:22) at Immediate.onsave (/home/…/my_app/node_modules/express-session/index.js:335:11) at runCallback (timers.js:666:20) at tryOnImmediate (timers.js:639:5) at processImmediate [as _immediateCallback] (timers.js:611:5)

Issue Analytics

State:
Created 6 years ago
Comments:6 (2 by maintainers)

Top GitHub Comments

4reactions

mohanencommented, May 8, 2017

Hi @dougwilson ,

I found the issue its due to the 404 error handling i wrote which messed up with WebSocket GET handshake

router.get('*', function(req, res) {
  res.status(404).send('Page NOT Found -_-\'');
});

Thanks and Regards.

1reaction

dougwilsoncommented, Jul 13, 2017

@Vinno97 provided some valuable information over in the Express repo. If you’re encountering this issue and using the express-ws module, you can follow the issue in the tracker at https://github.com/HenningM/express-ws/issues/64