how to share image to twitter from iphone application - iphone

Question

I'm using twitter+OAuth with MGTwitterengine in my application and successfully post a comment to twitter. But now my problem is share image to twitter using
https://upload.twitter.com/1/statuses/update_with_media.json . I searched many web sites and get source code by using this direct upload to twitter api
https://upload.twitter.com/1/statuses/update_with_media.json . here the code is below.
-(void)UploadimageToTwitter
{
//NSString *boundary = #"----------------------------991990ee82f7";
// NSURL *finalURL = [NSURL URLWithString:#"http://upload.twitter.com/1.1/statuses/update_with_media.json"];
NSString *accessTokenKey = kOAuthaccessTokenKey;
NSString *secretTokenKey = kOAuthsecretTokenKey;
NSURL *finalURL = [NSURL URLWithString:#"http://upload.twitter.com/1/statuses/update_with_media.json"];
/*if (!finalURL)
{
return nil;
}*/
OAConsumer *consumer = [[OAConsumer alloc] initWithKey:kOAuthConsumerKey secret:kOAuthConsumerSecret];
//Shearing picture on twitter with Oauth without any third party api.
OAToken *token = [[OAToken alloc] initWithKey:accessTokenKey secret:secretTokenKey]; //Set user Oauth access token and secrate key
//OAConsumer *consumer = [[OAConsumer alloc] initWithKey:ConsumerToken secret:ConsumerSecrateKey]; // Application cosumer token and secrate key
OAMutableURLRequest *theRequest = [[OAMutableURLRequest alloc] initWithURL:finalURL consumer:consumer token:token realm: nil signatureProvider:nil];
[theRequest setHTTPMethod:#"POST"];
[theRequest setTimeoutInterval:120];
[theRequest setHTTPShouldHandleCookies:NO];
// Set headers for client information, for tracking purposes at Twitter.
[theRequest setValue:DEFAULT_CLIENT_NAME forHTTPHeaderField:#"X-Twitter-Client"];
[theRequest setValue:DEFAULT_CLIENT_VERSION forHTTPHeaderField:#"X-Twitter-Client-Version"];
[theRequest setValue:DEFAULT_CLIENT_URL forHTTPHeaderField:#"X-Twitter-Client-URL"];
NSString *boundary = #"--0246824681357ACXZabcxyz";// example taken and implemented.
NSString *contentType = [NSString stringWithFormat:#"multipart/form-data; boundary=%#", boundary];
[theRequest setValue:contentType forHTTPHeaderField:#"content-type"];
// NSMutableData *body = [NSMutableData dataWithLength:0];
NSMutableData *body=[NSMutableData data];
[body appendData:[[NSString stringWithFormat:#"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
//status
[body appendData:[[NSString stringWithFormat:#"--%#\r\n\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:#"Content-Disposition:form-data; name=\"status\"\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
//[body appendData:[[NSString stringWithString:#"Content-Disposition: form-data; name=\"status\"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
//[body appendData:[[NSString stringWithFormat:#"%#",status] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:#"%#",#"Latest Uploading"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:#"\r\n"]dataUsingEncoding:NSUTF8StringEncoding]];
//[body appendData:[[NSString stringWithString:#"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
//media
[body appendData:[[NSString stringWithFormat:#"--%#\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:#"Content-Disposition:form-data; name=\"media_data[]\"; filename=\"sunflower.jpg\"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
//[body appendData:[[NSString stringWithString:#"Content-Disposition: form-data; name=\"media[]\"; filename=\"index.jpg\"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:#"Content-Type:application/octet-stream\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithString:#"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
UIImage *image1=[UIImage imageNamed:#"sunflower.jpg"];
NSData *imageData = UIImageJPEGRepresentation(image1, 1.0);
// [body appendData:[[NSString stringWithString:[UIImageJPEGRepresentation(image, 1.0) base64EncodingWithLineLength:0]] dataUsingEncoding:NSUTF8StringEncoding]];
// [body appendData:[[NSString stringWithString:#"Content-Type: application/octet-stream\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
//[body appendData:[[NSString stringWithFormat:#"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[NSData dataWithData:imageData]];
[body appendData:[[NSString stringWithFormat:#"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
// [body appendData:[[NSString stringWithString:#"Honeymoon uploads image\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:#"--%#--\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
// --------------------------------------------------------------------------------
// modificaiton from the base clase
// our version "prepares" the oauth url request
// --------------------------------------------------------------------------------
[theRequest prepare];
NSString *oAuthHeader = [theRequest valueForHTTPHeaderField:#"Authorization"];
[theRequest setHTTPBody:body];
NSHTTPURLResponse *response = nil;
NSError *error = nil;
NSData *responseData = [NSURLConnection sendSynchronousRequest:theRequest returningResponse:&response error:&error];
NSString *responseString = [[NSString alloc] initWithData:responseData encoding:NSUTF8StringEncoding];
NSLog(#"oAuthHeader = %# =",oAuthHeader);
NSLog(#"ResponsString = \n%#",responseString);
}
Using this code i'm getting responsestring is below
{"errors":[{"message":"Internal error","code":131}]}
It is a server error or my error. really do not know where i was wrong in the above code.
if anybody know answer please guide to me. your help saved my life cause i was searching the above task past three months using three kind of different api's like Twitpic, yfrog and now post/update_with_media.

Answer 1

NSString *status = tweetText.text;
TWRequest *sendTweet;
if(image1 == nil)
{
sendTweet = [[TWRequest alloc]
initWithURL:[NSURL URLWithString:#"https://api.twitter.com/1/statuses/update.json"]
parameters:[NSDictionary dictionaryWithObjectsAndKeys:status, #"status", nil]
requestMethod:TWRequestMethodPOST];
}
else
{
sendTweet = [[TWRequest alloc] initWithURL:[NSURL URLWithString:#"https://upload.twitter.com/1/statuses/update_with_media.json"]
parameters:[NSDictionary dictionaryWithObjectsAndKeys:status, #"status",image1,#"media" , nil]
requestMethod:TWRequestMethodPOST];
[sendTweet addMultiPartData:[tweetText.text dataUsingEncoding:NSUTF8StringEncoding] withName:#"status" type:#"multipart/form-data"];
[sendTweet addMultiPartData:UIImagePNGRepresentation(image1) withName:#"media" type:#"multipart/png"];
}
sendTweet.account = self.account;
[sendTweet performRequestWithHandler:^(NSData *responseData, NSHTTPURLResponse *urlResponse, NSError *error) {
if ([urlResponse statusCode] == 200)
{
dispatch_sync(dispatch_get_main_queue(),
^{
[self displayText:#"Tweet Done"];
});
}
else
{
NSLog(#"Problem sending tweet: %#", error);
}
}];
Hope this code works for you, it works for me, in this you can post image as well as text only. Best of luck