IE9 cache issues

[kapouer]

Hi,
Using latest (b5aba68) engine.io and associated (78f2471) client,
i get a failure with IE9 :

engine-client:socket creating transport "polling" +0ms 
engine-client:socket socket receive: type "open", data "{"sid":"3653182132859437","upgrades":["websocket"],"pingTimeout":60000}" +98ms 
engine-client:socket socket open +2ms 
engine-client:socket starting upgrade probes +2ms 
engine-client:socket probing transport "websocket" +1ms 
engine-client:socket creating transport "websocket" +1ms 
engine-client:socket socket receive: type "ping", data "undefined" +24s 
engine-client:socket flushing 1 packets in socket +0ms 
engine-client:socket socket close with reason: "ping timeout" +1.0m 
engine-client:socket socket closed prematurely - aborting probe +0ms 
SCRIPT5007: Unable to get value of the property 'close': object is null or undefined 
engine.io.js, line 1184 character 3

However, if i set cache settings to "every time i visit the web page" :

engine-client:socket creating transport "polling" +0ms 
engine-client:socket socket receive: type "open", data "{"sid":"1990083178490188","upgrades":["websocket"],"pingTimeout":60000}" +40ms 
engine-client:socket socket open +0ms 
engine-client:socket starting upgrade probes +0ms 
engine-client:socket probing transport "websocket" +1ms 
engine-client:socket creating transport "websocket" +0ms 
engine-client:socket socket receive: type "ping", data "undefined" +24s 
engine-client:socket flushing 1 packets in socket +0ms
engine-client:socket socket receive: type "ping", data "undefined" +24s 
engine-client:socket flushing 1 packets in socket +0ms

The second ping is eaten by IE ?!?

[kapouer]

BTW it goes without saying that there is something wrong with the call to "close".

[kapouer]

Oh god it's fixed by
ruxkor@ffebc52d

[kapouer]

Some more precisions :
while #ffebc52d was needed for IE8/9 because of cache issues, and works if the client code (let's call it eio.js) is served on the same host as the web page calling it,
i tested that ruxkor@e0964131 is needed to solve the case when eio.js is on another host.

[rauchg]

Please check out 78f2471..995d5e0

[kapouer]

that fixes this issue, thanks.