ios - upload audio and additional parameters in post method - ios

Question

Here I need to upload the mp3 audio by using the post method, but wrote the code for uploading the audio but i dont know how include the parameters.
kindly check my code and help me to attach parameters.
NSString *baseurl = UploadAudio;
// baseurl = [NSString stringWithFormat:#"%#user_id=%#&comments=%#&login_key=%#",baseurl,[[sharedvar userdict] objectForKey:#"user_id"],[self.audiodict objectForKey:#"comments"],[[sharedvar userdict] objectForKey:#"login_key"]];
NSLog(#"baseurl :%#",baseurl);
NSURL *dataURL = [NSURL URLWithString:baseurl];
NSMutableURLRequest *dataRqst = [NSMutableURLRequest requestWithURL:dataURL cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:30.0];
[dataRqst setHTTPMethod:#"POST"];
NSString *stringBoundary = #"0xKhTmLbOuNdArY---This_Is_ThE_BoUnDaRyy---pqo";
NSString *headerBoundary = [NSString stringWithFormat:#"multipart/form-data; boundary=%#",stringBoundary];
[dataRqst addValue:headerBoundary forHTTPHeaderField:#"Content-Type"];
NSMutableData *postBody = [NSMutableData data];
// -------------------- ---- Audio Upload Status ---------------------------\\
//pass MediaType file
[postBody appendData:[[NSString stringWithFormat:#"--%#\r\n", stringBoundary] dataUsingEncoding:NSUTF8StringEncoding]];
[postBody appendData:[[NSString stringWithFormat:#"Content-Disposition: form-data; userfile=\"file upload\"; filename=\"uploadaudio.mp3\"\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[postBody appendData:[#"Content-Type: audio/mp3\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
//*******************load locally store audio file********************//
NSString *audioUrl = [[self audiodict] objectForKey:#"audiopath"];
NSLog(#"audioUrl :%#",audioUrl);
// get the audio data from main bundle directly into NSData object
NSData *audioData;
audioData = [[NSData alloc] initWithContentsOfFile:audioUrl];
// add it to body
[postBody appendData:audioData];
[postBody appendData:[#"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
// final boundary
[postBody appendData:[[NSString stringWithFormat:#"--%#--\r\n", stringBoundary] dataUsingEncoding:NSUTF8StringEncoding]];
// [postBody appendData:postData];
// add body to post
[dataRqst setHTTPBody:postBody];
NSURLConnection *connection = [NSURLConnection connectionWithRequest:dataRqst delegate:self];
[connection start]; // connection
My parameters are userid and session.Could any body help me for adding these parameters and values

Answer 1

You can use ASIHTTPRequest for sending Audiofiles and additional parameters. It is vary easy to use. Just 2 line of code .It helped me a lot :-)
ASIFormDataRequest *request = [ASIFormDataRequest requestWithURL:url];
[request setFile:#"YOUR FILE PATH WITH FILE EXTENSION" forKey:#"YOUR FILE KEY"];

Answer 2

Just before the line // final boundary add these lines:
//Append userid
[postBody appendData:[[NSString stringWithFormat:#"--%#\r\n", stringBoundary] dataUsingEncoding:NSUTF8StringEncoding]];
[postBody appendData:[[NSString stringWithFormat:#"Content-Disposition: form-data; name=\"userid\"\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[postBody appendData:[[NSString stringWithFormat:#"%#\r\n", myUserID] dataUsingEncoding:NSUTF8StringEncoding]];
use these 3 lines over and over to append more fields e.g. the session field.