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OAuthConsumer and Twitpic

I am trying to send images to TwitPic using OAuthConsumer. I keep getting 401 "Failed to authenticate you (header rejected by twitter)." error.

I also use the Twitter + OAuth library to process the login and publish regular tweets, and then save the secret token and token for use with TwitPic.

This is the code in which I use the query construct:

NSURL *twitpicUrl = [NSURL URLWithString:@"http://api.twitpic.com/2/upload.json"]; NSString* realm = @"http://api.twitter.com/"; OAToken* oaToken = [[OAToken alloc] initWithKey:savedToken secret:savedTokenSecret]; OAConsumer* oaConsumer = [[OAConsumer alloc] initWithKey:kOAuthConsumerKey secret:kOAuthConsumerSecret]; OAMutableURLRequest *request = [[[OAMutableURLRequest alloc] initWithURL:twitpicUrl consumer:oaConsumer token:oaToken realm:realm signatureProvider:nil] autorelease]; [request prepare]; [request setHTTPMethod:@"POST"]; [request setValue:@"https://api.twitter.com/1/account/verify_credentials.json" forHTTPHeaderField:@"X-Auth-Service-Provider"]; NSString* authorizeHeader = [request valueForHTTPHeaderField:@"Authorization"]; [request setValue:authorizeHeader forHTTPHeaderField:@"X-Verify-Credentials-Authorization"];

And if I print my headers, this is what I get (excluding the unused authorization header):

  "X-Auth-Service-Provider" = "https://api.twitter.com/1/account/verify_credentials.json"; "X-Verify-Credentials-Authorization" = "OAuth realm=\"http%3A%2F%2Fapi.twitter.com%2F\", oauth_consumer_key=\"JOvwW7mtZUjRXZRInkQI7w\", oauth_token=\"293217559-pD0HL0oE6TZSkU35mPnc7kia325oPDgMfQMTVArK\", oauth_signature_method=\"HMAC-SHA1\", oauth_signature=\"ctmCK35JFwx8qs8lQj0AYB6sUr4%3D\", oauth_timestamp=\"1304580843\", oauth_nonce=\"7EBE3EB0-641A-40EA-A57C-8D071B5E647F\", oauth_version=\"1.0\"";

Received error:

 Error: The operation couldn't be completed. (NSURLErrorDomain error -1012.) {"errors":[{"code":401,"message":"Could not authenticate you (header rejected by twitter)."}]}

I have excluded some details here, especially adding these messages, mainly because I do not think this refers to the error. If you think otherwise please let me know and I will update the question.

Can anyone help?

Update: Here is the code that I am now successfully using

In the title:

 #define kVerifyCredentialsUrl @"https://api.twitter.com/1/account/verify_credentials.json" #define kTwitPicUrl @"http://api.twitpic.com/2/upload.json"

Implementation:

 //prepare the verify credentials header NSURL* serviceUrl = [NSURL URLWithString:kVerifyCredentialsUrl]; NSString* realm = @"http://api.twitter.com/"; OAToken* token = [[OAToken alloc] initWithKey:tokenKey secret:tokenSecret]; OAConsumer* consumer = [[OAConsumer alloc] initWithKey:kOAuthConsumerKey secret:kOAuthConsumerSecret]; OAMutableURLRequest *request = [[OAMutableURLRequest alloc] initWithURL:serviceUrl consumer:consumer token:token realm:realm signatureProvider:nil]; [request setHTTPMethod:@"GET"]; [request prepare]; NSDictionary* headerDictionary = [request allHTTPHeaderFields]; NSString* oAuthHeader = [NSString stringWithString:[headerDictionary valueForKey:@"Authorization"]]; [request release]; request = nil; //prepare the full request serviceUrl = [NSURL URLWithString:kTwitPicUrl]; request = [[OAMutableURLRequest alloc] initWithURL:serviceUrl consumer:consumer token:token realm:realm signatureProvider:nil]; [request setHTTPMethod:@"POST"]; [request setValue:kVerifyCredentialsUrl forHTTPHeaderField:@"X-Auth-Service-Provider"]; [request setValue:oAuthHeader forHTTPHeaderField:@"X-Verify-Credentials-Authorization"]; //add the content and start the request UIImage* imageToUpload = [UIImage imageNamed:@"test.png"]; NSData *data = UIImagePNGRepresentation(imageToUpload); ASIFormDataRequest *asiRequest = [[[ASIFormDataRequest alloc] initWithURL:[NSURL URLWithString:kTwitPicUrl]] autorelease]; [asiRequest addRequestHeader:@"X-Auth-Service-Provider" value:kVerifyCredentialsUrl]; [asiRequest addRequestHeader:@"X-Verify-Credentials-Authorization" value:oAuthHeader]; [asiRequest setPostValue:@"Message here" forKey:@"message"]; [asiRequest setPostValue:kTwitPicAPIKey forKey:@"key"]; [asiRequest setData:data forKey:@"media"]; [asiRequest setDidFinishSelector:@selector(requestDone:)]; [asiRequest setDidFailSelector:@selector(requestWentWrong:)]; [asiRequest setDelegate:self]; [asiRequest startAsynchronous];
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2 answers

Try the following:

 NSURL *serviceURL = [NSURL URLWithString:@"https://api.twitter.com/1/account/verify_credentials.json"]; OAMutableURLRequest *oRequest = [[OAMutableURLRequest alloc] initWithURL:serviceURL consumer:consumer_ token:accessToken_ realm:@"http://api.twitter.com/" signatureProvider:nil]; [oRequest setHTTPMethod:@"GET"]; [oRequest prepare]; NSDictionary * headerDict = [oRequest allHTTPHeaderFields]; NSString * oauthHeader = [NSString stringWithString:[headerDict valueForKey:@"Authorization"]]; [oRequest release]; // Prepare the POST request oRequest = nil; serviceURL = nil; serviceURL = [NSURL URLWithString:@"http://api.twitpic.com/2/upload.json"]; oRequest = [[OAMutableURLRequest alloc] initWithURL:serviceURL consumer:consumer_ token:accessToken_ realm:@"http://api.twitter.com/" signatureProvider:nil]; [oRequest setHTTPMethod:@"POST"]; [oRequest setValue:@"https://api.twitter.com/1/account/verify_credentials.json" forHTTPHeaderField:@"X-Auth-Service-Provider"]; [oRequest setValue:oauthHeader forHTTPHeaderField:@"X-Verify-Credentials-Authorization"];

You should also make this change to OAMutableURLRequest.m at the end of the method - (void):

  NSString *oauthHeader = [NSString stringWithFormat:@"OAuth realm=\"%@\", oauth_consumer_key=\"%@\", %@oauth_signature_method=\"%@\", oauth_signature=\"%@\", oauth_timestamp=\"%@\", oauth_nonce=\"%@\", oauth_version=\"1.0\"%@", [realm URLEncodedString], [consumer.key URLEncodedString], oauthToken, [[signatureProvider name] URLEncodedString], [signature URLEncodedString], timestamp, nonce, extraParameters]; if(![self valueForHTTPHeaderField:@"X-Verify-Credentials-Authorization"]) [self setValue:oauthHeader forHTTPHeaderField:@"Authorization"];
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It could be a twitter issue right now. My code using OAMutableURLRequest, like yours, has been working fine for centuries, and today I continue to get the 401 error code. Looking for twitter you will find more people having this problem recently.

This is what you can read now on the api status page:

We are currently experiencing increased error rates. There may be intermittent problems loading twitter.com and twitter clients. We are aware of the problem and taking action. Thank you for your patience!

Twitter API Status

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