TypeError: this.transport is undefined

[Zanisimo]

I have added user side error logging on my site. Some times it logs these two error coming from socket.io code:

TypeError: this.transport is undefined

and

TypeError: Cannot call method 'close' of undefined

As I am using the minified version the error is some where in Socket.prototype.onDisconnect or Socket.prototype.reconnect functions. More likely that the error is logged from onDisconnect function because I am setting 'reconnect' : false in configuration options on client side.

The error have been seen from users with Firefox 15th and 16th version on Windows, Chrome 22nd version on Mac and Windows and also on IE8.

Socket.io version is 0.9.10.

Can you please tell me what could be the reasons for this error?

Any help appreciated.

[phisch]

I am having the exact same issue. I would really like to know how to fix this!

[davedoesdev]

I tracked this down to disconnect before a handshake completed.

In Socket.prototype.onDisconnect:

    if (wasConnected || wasConnecting) {
      this.transport.close();
      this.transport.clearTimeouts();

this.transport is undefined because it's only set in Socket.prototype.connect after a handshake completes.

The fix is simply to check this.transport before calling it:

    if (wasConnected || wasConnecting) {
      if (this.transport) {
        this.transport.close();
        this.transport.clearTimeouts();
      }

[davedoesdev]

#511

[okv]

i have same problem with socket.io@0.9.13 and socket.io-client@0.9.11 looks like #511 should fix that, any plans about merge it into master?

[davedoesdev]

This is a larger question: The pull requests and issues are stacking up. Is this project mothballed now (should I switch to something else)?

[tj]

you can't assume a project is unmaintained because of that, popular projects have lots of strange pull-requests and issue that are often unrelated, or are mailing-list type material.

[davedoesdev]

Sure, hence the question.
I'll ask on the group.

[hemp]

+1

I have manually brought in pullrequest #511 into my project's 0.9.16 copy of socketio. I also added a guard into setHeartbeatTimeout for self.transport before trying to call onClose() (which is another issue #442).

[ralyodio]

still borken.

[davedoesdev]

You might like to checkout primus: https://github.com/primus/primus
@3rd-Eden has done a great job.

[Double-Lv]

I can't find the client file socket.io.js. on my nodejs server
any one can tell me where is it?