IPhone – What port does iPhone native Facebook app use

facebookiphonePROXY

The network at my place is using a proxy. So I have set up the proxy in iPhone. I can connect to the internet and access Facebook using the Safari browser without any problem. However when I access Facebook using the native app, it gives me a connection error. Why is this so? Does the native app use different ports instead of getting JSON objects through HTTP port? I am quite new to this, so bear with me.

Best Answer

First, this is a really good question. Wow. I've been trying for days to figure out how to attack this one.

I set up "Charles Web Debugging Proxy" on my Mac and set up my iPhone to hit it.

First, it hits http://api.facebook.com/restserver.php, which spits this back:

<chat_connect_response xmlns="http://api.facebook.com/1.0/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://api.facebook.com/1.0/ http://api.facebook.com/1.0/facebook.xsd"> 
<host>9.channel</host> 
<port>80</port> 
<channel>p_123456789</channel> 
<seq>0</seq>

Meanwhile, it also connects to iphone.facebook.com which gives some XML. Then it connects to 0.9_channel.facebook.com:80 and sends some requests which return JSON.

It looks like everything is done over port 80. Are you sure theres no other problem on your end?

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