Websocket connection fails on iOS5

[rondinos]

Hello,

I am having a very weird issue with socket.io, and it only happens when I enable websocket in transports.

Here is my debug log:
debug: client authorized
info: handshake authorized eJ3GCg5YmO3iRjeJuvEP
debug: setting request GET /socket.io/1/websocket/eJ3GCg5YmO3iRjeJuvEP
debug: set heartbeat interval for client eJ3GCg5YmO3iRjeJuvEP
debug: client authorized for
debug: setting request GET /socket.io/1/xhr-polling/eJ3GCg5YmO3iRjeJuvEP?t=1370643718147
debug: setting poll timeout
debug: discarding transport
debug: cleared heartbeat interval for client eJ3GCg5YmO3iRjeJuvEP
debug: setting request GET /socket.io/1/jsonp-polling/eJ3GCg5YmO3iRjeJuvEP?t=1370643728169&i=0
debug: setting poll timeout
debug: discarding transport
debug: clearing poll timeout
debug: clearing poll timeout
debug: jsonppolling writing io.j0;
debug: set close timeout for client eJ3GCg5YmO3iRjeJuvEP
debug: jsonppolling closed due to exceeded duration
debug: setting request GET /socket.io/1/jsonp-polling/eJ3GCg5YmO3iRjeJuvEP?t=1370643748562&i=0
debug: setting poll timeout
debug: discarding transport
debug: cleared close timeout for client eJ3GCg5YmO3iRjeJuvEP
debug: clearing poll timeout
debug: jsonppolling writing io.j0;
debug: set close timeout for client eJ3GCg5YmO3iRjeJuvEP
debug: jsonppolling closed due to exceeded duration
debug: setting request GET /socket.io/1/jsonp-polling/eJ3GCg5YmO3iRjeJuvEP?t=1370643768715&i=0
debug: setting poll timeout
debug: discarding transport

On the client after a few failed connections it says:
XMLHttpRequest cannot load http://XX.XX.XX.XX:8010/socket.io/1/xhr-polling/eJ3GCg5UmO3IRjeJuvEP?t=137064378147. Origin http://m.mydomain.com is not allowed by Access-Control-Allow-Origin.

I don't think that the client error is related to the problem, because it only happens after continues fails. For example if I disable every protocol and I only allow xhr-polling, then the connection works fine. And it doesn't complain about the Origin.

I have this issue on:
iPhone 5.01
iPad 5.11

But there is no issue on
iPhone/iPad 6.x

It also works fine on my old server with socket.io (0.9.14) and it failed on the new server with socket.io (0.9.16). I tried to downgrade the new server to 0.9.14 and I am still having the same issue. I really cannot figure out the issue, since the handshake works.

[rondinos]

It looks like the issue happens on node.js > 0.10.7
Websockets are working perfectly fine on 0.10.7 but they break on 0.10.8. I will have to investigate more to see what has changed.

[TomKaltz]

Any update on this?