Upload audio - http streaming - objective-c

Question

I'm trying to upload a linear file under http in streaming mode.
The idea is do this steps simultaneously,
1) Thread 1: record an audio file and store it in a temp file
2) Thread 2: Take n bytes from temp file and send it to an http server.
How can I write an http stream?, On CFHTTPStream I did not see write methods, only read :s
Do I need use sockets?
Thanks!!!
My actual code is
CFWriteStreamRef stream;
NSString *strUrl = #"myurl";
NSURL *url = [[[NSURL alloc] initWithString:strUrl] retain];
CFStringRef requestMethod = CFSTR("GET");
CFHTTPMessageRef message= CFHTTPMessageCreateRequest(kCFAllocatorDefault, requestMethod, (CFURLRef)url, kCFHTTPVersion1_1);
CFHTTPMessageSetHeaderFieldValue(message, CFSTR("Content-Type"),
CFSTR("multipart/form-data"));
stream = ?? //CFReadStreamCreateForHTTPRequest(NULL, message);
CFRelease(message);
//other headers...
if (CFWriteStreamSetProperty(stream, kCFStreamPropertyHTTPShouldAutoredirect, kCFBooleanTrue) == false)
{
NSLog(#"Error");
return NO;
}
//
// Open the stream
//
if (!CFWriteStreamOpen(stream))
{
CFRelease(stream);
NSLog(#"Error");
return NO;
}
CFStreamClientContext context = {0, self, NULL, NULL, NULL};
CFWriteStreamSetClient(stram, kCFStreamEventHasBytesAvailable | kCFStreamEventErrorOccurred | kCFStreamEventEndEncountered,
RSWriteStreamCallBack,
&context);
CFWriteStreamScheduleWithRunLoop(stream, CFRunLoopGetCurrent(), kCFRunLoopCommonModes);

Answer 1

The solution is create an subclass of NSInputStream, and implement the methods open, close, read, hasBytesAvailable and don't forget - (NSStreamStatus)streamStatus.
Last method is invoked from http to know if we are open, close or we was finished (NSStreamStatusAtEnd) to send (there are others status, but this are the most important).
I use a tmp file like buffer because I have to send a lot of data, but, perhaps, a data memory buffer could be better.
Finally I implement other class where use my custom NSInputStream, here is the code:
NSURL *url = [NSURL URLWithString:#"url"];
NSMutableURLRequest *req = [NSMutableURLRequest requestWithURL:url];
[req setHTTPMethod:#"POST"];
//set headers if you have to do for example:
NSString *contentType = [NSString stringWithFormat:#"multipart/form-data"];
[req setValue:contentType forHTTPHeaderField:#"Content-Type"];
//Create your own InputStream
instream = [[CustomStream alloc] init];
[req setHTTPBodyStream:instream];
//I remove instream later
NSURLConnection *aConnection = [[NSURLConnection alloc] initWithRequest:req delegate:self startImmediately:NO];
[aConnection scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];
[aConnection start];