IPHONE: Http POST request

Execute a POST request

// target URL
CFURLRef URL = CFURLCreateWithString(
        kCFAllocatorDefault,
        CFSTR("http://www.apple.com"),
        NULL);

// request type
CFStringRef requestMethod =
        CFSTR("POST");

// setup request
CFHTTPMessageRef myRequest =
        CFHTTPMessageCreateRequest(
                kCFAllocatorDefault,
                requestMethod,
                URL,
                kCFHTTPVersion1_1);

// body
CFStringRef bodyString =
        CFSTR("[[post content value-pairs]]");

// set body in msg
CFHTTPMessageSetBody(
        myRequest,
        CFStringCreateExternalRepresentation(
                NULL,
                bodyString,
                kCFStringEncodingMacRoman,
                '?'));

// header
CFHTTPMessageSetHeaderFieldValue(
        myRequest,
        CFSTR("Content-Length"),
        (CFStringRef) [NSString stringWithFormat: @"%d",
                CFStringGetLength(bodyString)]);

// header property #1
CFHTTPMessageSetHeaderFieldValue(
        myRequest,
        CFSTR("Host"),
        CFSTR("www.apple.com"));

// header property #2
CFHTTPMessageSetHeaderFieldValue(
        myRequest,
        CFSTR("Content-Type"),
        CFSTR("application/x-www-form-urlencoded"));

// POST it
CFReadStreamRef myReadStream =
        CFReadStreamCreateForHTTPRequest(
                kCFAllocatorDefault,
                myRequest);

CFStreamClientContext myContext =
        { 0, (void*)NULL, NULL, NULL, NULL };

CFReadStreamSetProperty(
        myReadStream,
        kCFStreamPropertyHTTPAttemptPersistentConnection,       
        kCFBooleanTrue);

CFReadStreamSetClient(
        myReadStream,
        kCFStreamEventHasBytesAvailable |
        kCFStreamEventErrorOccurred |
        kCFStreamEventEndEncountered,
        ReadStreamClientCallBack,
        &myContext);

CFReadStreamScheduleWithRunLoop(
        myReadStream,
        CFRunLoopGetCurrent(),       
        kCFRunLoopCommonModes);

CFReadStreamOpen(myReadStream);

CFRelease(myRequest);
CFRelease(URL);

Access the message returned

// debug print message
CFDataRef msgFromRequest =
        CFHTTPMessageCopySerializedMessage(myRequest);

// length of msg
int msgLength =
        CFDataGetLength(msgFromRequest);

// buffer to hold data
Byte* buffer =
        (Byte*) malloc (sizeof(Byte) * msgLength);

// grab data place into buffer
CFDataGetBytes(msgFromRequest, CFRangeMake(0, msgLength), buffer);

// clean up
CFRelease(msgFromRequest);
free(buffer);