Making an HTTP POST Request in Swift

In this example I will be uploading an image to a node.js server.

func makePostRequest(){
    // create a instantiate a session
    let session = NSURLSession.sharedSession()
    // set url to POST to
    var url = NSURL(string: "http://yourdomain.com/post")
    // create the request object
    var request = NSMutableURLRequest(URL: url!)
    request.HTTPMethod = "POST"
    request.HTTPBody = YOUR_REQUEST_BODY
    // set up the queue where we will do the actual POSTing mainly to not block the UI if the data posting is large
    let qualityOfServiceClass = QOS_CLASS_BACKGROUND
    let backgroundQueue = dispatch_get_global_queue(qualityOfServiceClass, 0)
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        let dataTask = session.dataTaskWithRequest(request, completionHandler: {(data, response, error) in
            dispatch_async(dispatch_get_main_queue(), { () -> Void in
                // print the response from our image server
                println("Response: \(response)")
            })
        })
        // fire off the request
        dataTask.resume()
    })
}