(Objective-C) Upload Media to Twitter

Demonstrates uploading image or video files to Twitter. After uploading, the media_id can be used to attach the uploaded media to a tweet.

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#import <CkoJsonObject.h>
#import <CkoHttp.h>
#import <CkoHttpRequest.h>
#import <CkoFileAccess.h>
#import <CkoHttpResponse.h>

// It requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

// Assume we've previously obtained an access token and saved it to a JSON file..
CkoJsonObject *jsonToken = [[CkoJsonObject alloc] init];
BOOL success = [jsonToken LoadFile: @"qa_data/tokens/twitter.json"];

CkoHttp *http = [[CkoHttp alloc] init];

// Provide the OAuth 1.0a credentials:
http.OAuth1 = YES;
http.OAuthConsumerKey = @"TWITTER_CONSUMER_KEY";
http.OAuthConsumerSecret = @"TWITTER_CONSUMER_SECRET";
http.OAuthToken = [jsonToken StringOf: @"oauth_token"];
http.OAuthTokenSecret = [jsonToken StringOf: @"oauth_token_secret"];

CkoHttpRequest *req = [[CkoHttpRequest alloc] init];
req.HttpVerb = @"POST";
req.ContentType = @"multipart/form-data";
req.Path = @"/1.1/media/upload.json";

[req AddHeader: @"Expect" value: @"100-continue"];

// Add a JPEG image file to the upload.
CkoFileAccess *fac = [[CkoFileAccess alloc] init];
NSData jpgBytes;
jpgBytes = [fac ReadEntireFile: @"qa_data/jpg/starfish.jpg"];
[req AddBytesForUpload: @"media" filename: @"starfish.jpg" byteData: jpgBytes];

CkoHttpResponse *resp = [http SynchronousRequest: @"upload.twitter.com" port: [NSNumber numberWithInt: 443] ssl: YES req: req];
if (http.LastMethodSuccess != YES) {
    NSLog(@"%@",http.LastErrorText);
    return;
}

CkoJsonObject *jsonResponse = [[CkoJsonObject alloc] init];
jsonResponse.EmitCompact = NO;
[jsonResponse Load: resp.BodyStr];

if ([resp.StatusCode intValue] != 200) {
    NSLog(@"%@",[jsonResponse Emit]);
    return;
}

// Show the successful response:
NSLog(@"%@",[jsonResponse Emit]);
NSLog(@"%@",@"Success.");

// A successful JSON response looks like this:

// 	{
// 	  "media_id": 793137045996646400,
// 	  "media_id_string": "793137045996646400",
// 	  "size": 6229,
// 	  "expires_after_secs": 86400,
// 	  "image": {
// 	    "image_type": "image\/jpeg",
// 	    "w": 120,
// 	    "h": 120
// 	  }
// 	}
// 

// Get the information from the JSON:
NSLog(@"%@%@",@"media_id_string = ",[jsonResponse StringOf: @"media_id_string"]);
NSLog(@"%@%d",@"size = ",[[jsonResponse IntOf: @"size"] intValue]);
NSLog(@"%@%@",@"image_type = ",[jsonResponse StringOf: @"image.image_type"]);
NSLog(@"%@%d%@%d",@"height/width = ",[[jsonResponse IntOf: @"image.w"] intValue],@",",[[jsonResponse IntOf: @"image.h"] intValue]);