Unable to POST data from IPhone using google account authentication

Question

I'm working on an IPhone application that works with a Google App Engine application. I manage to get logged by using a google account and I get the authentication token. I'm also able to GET data from the GAE service (I did it after reading another question written here) but now I need to POST data so I need to send the authentication token in the header of the POST request. I tried several options but none of them worked.

Here is the code I use to put that auth into the header:

NSString* urlStr = [NSString stringWithFormat:@"%@%@", HOST, url];
NSMutableURLRequest* urlPost = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:urlStr]]; 
NSString* authStr = [NSString stringWithFormat:@"GoogleLogin auth=%@", token];
[urlPost addValue:authStr forHTTPHeaderField:@"Authorization"];

but it doesn't work.

Any help?

Answer 1

Whenever I'm troubleshooting a problem related to HTTP, the first tool I'll grab is Charles HTTP Proxy. It will show you the entire request and response for closer examination.

Answer 2

You need to use [request setHTTPMethod: @"POST"] and [request setHTTPBody: postdata] to properly configure the POST components. See the NSMutableURLRequest docs for more details.

Answer 3

If you're authenticating against an App Engine app, you need to obtain and send an authentication cookie, rather than using the GoogleLogin authentication. The source of appengine_rpc.py in the Python SDK demonstrates how.

Answer 4

You said you managed 'to get logged by using a google account and I get the authentication token'... How do you did that?