Twitter（适用于iOS），oauth_nonce和发送帖子请求？

Question

I'm trying to get reverse_oauth to work on an iPhone application, but I've encountered some problems regarding the POST request and what values I actually should send, so my question is two-fold.

I'm trying to follow the guide that twitter posted here: https://dev.twitter.com/docs/ios/using-reverse-auth

The first question regards to oauth_nonce, or rather how do I get the value to send in? I get that oauth_nonce is a random generated string hashed by the algorithm HMAC-SHA1, but should I generate a random string that is hashed every time I want to make a request? Or is it a value that should be hashed based on something?

And my POST request currently looks like this:

NSString *twitterUrlToPing = @"https://api.twitter.com/oauth/request_token";

NSURL *twitterUrl = [NSURL URLWithString:twitterUrlToPing];

NSMutableURLRequest *req = [NSMutableURLRequest requestWithURL:twitterUrl];
[req addValue:@"xxx" forHTTPHeaderField:@"oauth_consumer_key"];
[req addValue:@"xxx" forHTTPHeaderField:@"oauth_nonce"];
[req addValue:@"HMAC-SHA1" forHTTPHeaderField:@"oauth_signature_method"];
[req addValue:timeStampString forHTTPHeaderField:@"oauth_timestamp"];
[req addValue:@"1.0" forHTTPHeaderField:@"oauth_version"];
[req addValue:@"reverse_auth" forHTTPHeaderField:@"x_auth_mode"];

[req setHTTPMethod:@"POST"];

NSLog(@"twitterHeaderPostvalues: %@", [req allHTTPHeaderFields]);

NSURLResponse *response;
NSError *err;
NSData *responseData = [NSURLConnection sendSynchronousRequest:req returningResponse:&response error:&err];
NSString *content = [[NSString alloc] initWithData:responseData encoding:NSUTF8StringEncoding];

NSLog(@"contentResponseFromTwitter: %@", content);

Is this the correct way to send the request, and if not how should it look like?

Answer 1

Joakim, may I suggest taking a look at this example... https://github.com/seancook/TWReverseAuthExample

Sean is a Twitter employee and i've had no troubles with this code at all. Takes alot of the headaches away and handles errors nicely.