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copied!<p>My original answer proved to be incorrect, but the OP posted a link to code that he said fixed his problem. I have copied that code below so that future searchers can find it easily, since I know how frustrating it can be to see your problem described and find a link to the solution only to have that link be dead.</p> <p>Code based on <a href="http://forums.macrumors.com/showthread.php?t=427513" rel="nofollow">http://forums.macrumors.com/showthread.php?t=427513</a>:</p> <pre><code>- (BOOL)sendPhotoToTumblr:(NSString *)photo usingEmail:(NSString *)tumblrEmail andPassword:(NSString *)tumblrPassword withCaption:(NSString *)caption; { //get image data from file NSData *imageData = [NSData dataWithContentsOfFile:photo]; //stop on error if (!imageData) return NO; //Create dictionary of post arguments NSArray *keys = [NSArray arrayWithObjects:@"email",@"password",@"type",@"caption",nil]; NSArray *objects = [NSArray arrayWithObjects: tumblrEmail, tumblrPassword, @"photo", caption, nil]; NSDictionary *keysDict = [[NSDictionary alloc] initWithObjects:objects forKeys:keys]; //create tumblr photo post NSURLRequest *tumblrPost = [self createTumblrRequest:keysDict withData:imageData]; [keysDict release]; //send request, return YES if successful tumblrConnection = [[NSURLConnection alloc] initWithRequest:tumblrPost delegate:self]; if (!tumblrConnection) { NSLog(@"Failed to submit request"); return NO; } else { NSLog(@"Request submitted"); receivedData = [[NSMutableData data] retain]; [tumblrConnection release]; return YES; } } -(NSURLRequest *)createTumblrRequest:(NSDictionary *)postKeys withData:(NSData *)data { //create the URL POST Request to tumblr NSURL *tumblrURL = [NSURL URLWithString:@"http://www.tumblr.com/api/write"]; NSMutableURLRequest *tumblrPost = [NSMutableURLRequest requestWithURL:tumblrURL]; [tumblrPost setHTTPMethod:@"POST"]; //Add the header info NSString *stringBoundary = [NSString stringWithString:@"0xKhTmLbOuNdArY"]; NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@",stringBoundary]; [tumblrPost addValue:contentType forHTTPHeaderField: @"Content-Type"]; //create the body NSMutableData *postBody = [NSMutableData data]; [postBody appendData:[[NSString stringWithFormat:@"--%@\r\n",stringBoundary] dataUsingEncoding:NSUTF8StringEncoding]]; //add key values from the NSDictionary object NSEnumerator *keys = [postKeys keyEnumerator]; int i; for (i = 0; i < [postKeys count]; i++) { NSString *tempKey = [keys nextObject]; [postBody appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"\r\n\r\n",tempKey] dataUsingEncoding:NSUTF8StringEncoding]]; [postBody appendData:[[NSString stringWithFormat:@"%@",[postKeys objectForKey:tempKey]] dataUsingEncoding:NSUTF8StringEncoding]]; [postBody appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",stringBoundary] dataUsingEncoding:NSUTF8StringEncoding]]; } //add data field and file data [postBody appendData:[[NSString stringWithString:@"Content-Disposition: form-data; name=\"data\"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]]; [postBody appendData:[[NSString stringWithString:@"Content-Type: application/octet-stream\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]]; [postBody appendData:[NSData dataWithData:data]]; [postBody appendData:[[NSString stringWithFormat:@"\r\n--%@--\r\n",stringBoundary] dataUsingEncoding:NSUTF8StringEncoding]]; //add the body to the post [tumblrPost setHTTPBody:postBody]; return tumblrPost; } </code></pre> <p>I have modified the above code to eliminate some memory issues and to add some parameters to make this a more generic/flexible solution. However, if someone would like the original code as posted on that site, just look through this answer's edit revisions.</p>

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