Multipart ImageUpload with Param data in IOS - ios

Question

I am trying to upload image with some text data. But When i try it for image upload only. it works! But for param, I am getting result=null. so data is sending null. here is my code.
-(void)uploadImage : (UIImage *)image : (NSString *)url : (NSString *)param
{
NSLog(#"URL : %#", url);
NSLog(#"param : %#", param);
NSData *myData=UIImagePNGRepresentation(image);
NSMutableURLRequest *request;
NSString *urlString = url;
NSString *filename = #"image";
request= [[NSMutableURLRequest alloc] init];
[request setURL:[NSURL URLWithString:urlString]];
[request setHTTPMethod:#"POST"];
NSDictionary *temp = #{#"result" : #"rob"
};
//opening boundary
NSString *boundary = #"---------------------------14737809831466499882746641449";
NSString *contentType = [NSString stringWithFormat:#"multipart/form-data; boundary=%#",boundary];
[request addValue:contentType forHTTPHeaderField: #"Content-Type"];
NSMutableData *postbody = [NSMutableData data];
[postbody appendData:[[NSString stringWithFormat:#"\r\n--%#\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
// [postbody appendData:[[NSString stringWithFormat:#"--%#--", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[postbody appendData:[[NSString stringWithFormat:#"Content-Disposition: form-data; name=\"file\"; filename=\"%#.png\"\r\n", filename] dataUsingEncoding:NSUTF8StringEncoding]];
[postbody appendData:[#"Content-Type: application/octet-stream\r\n\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
[postbody appendData:[NSData dataWithData:myData]];
//params
[postbody appendData:[ [temp description] dataUsingEncoding:NSUTF8StringEncoding]];
//closing boundary
[postbody appendData:[[NSString stringWithFormat:#"\r\n--%#--\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[request setHTTPBody:postbody];
NSURLConnection *conn = [[NSURLConnection alloc] initWithRequest:request delegate:self];
// conn.delegate = self;
[conn start];
}
may any expert help me what i am missing?

Answer 1

You could use a library like AFNetworking for all your requests. It's very easy and makes your code more readable. Here is a way to create a multipart file upload with parameters (https://github.com/AFNetworking/AFNetworking#creating-an-upload-task-for-a-multi-part-request-with-progress)
NSDictionary *params = #{
#"result" : #"rob"
}
NSMutableURLRequest *request = [[AFHTTPRequestSerializer serializer] multipartFormRequestWithMethod:#"POST" URLString:#"http://example.com/upload" parameters:params constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
[formData appendPartWithFileURL:[NSURL fileURLWithPath:#"file://path/to/image.jpg"] name:#"file" fileName:#"filename.jpg" mimeType:#"image/jpeg" error:nil];
} error:nil];
AFURLSessionManager *manager = [[AFURLSessionManager alloc] initWithSessionConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration]];
NSProgress *progress = nil;
NSURLSessionUploadTask *uploadTask = [manager uploadTaskWithStreamedRequest:request progress:&progress completionHandler:^(NSURLResponse *response, id responseObject, NSError *error) {
if (error) {
NSLog(#"Error: %#", error);
} else {
NSLog(#"%# %#", response, responseObject);
}
}];
[uploadTask resume];