viewController.swift

//
//  ViewController.swift
//  MyImageUploadExample
//
//  Created by user on 5/4/15.
//  Copyright (c) 2015 hhapit. All rights reserved.
//

import UIKit

class ViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate {

    @IBOutlet weak var myImageView: UIImageView!

    @IBOutlet weak var myActivityIndicator: UIActivityIndicatorView!

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }


    @IBAction func uploadButtonTapped(sender: AnyObject) {

        myImageUploadRequest()


    }

    @IBAction func selectPhotoButton(sender: AnyObject) {

        var myPickerController = UIImagePickerController()
        myPickerController.delegate = self;
        myPickerController.sourceType = UIImagePickerControllerSourceType.PhotoLibrary

        self.presentViewController(myPickerController, animated: true, completion: nil)

    }

    func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [NSObject : AnyObject])

    {
        myImageView.image = info[UIImagePickerControllerOriginalImage] as? UIImage

        self.dismissViewControllerAnimated(true, completion: nil)

    }

    func myImageUploadRequest()
    {

        let myUrl = NSURL(string: "http://www.higoapps.com/api/upload/");
        let request = NSMutableURLRequest(URL:myUrl!);
        request.HTTPMethod = "POST";

        let param = [
            "firstName" : "Sergey",
            "lastName" : "Kargopolov",
            "userId" : "9"
        ]

        let boundary = generateBoundaryString()

        request.setValue("multipart/form-data; boundary=\(boundary)", forHTTPHeaderField: "Content-Type")
        let imageData = UIImageJPEGRepresentation(myImageView.image, 1)

        if(imageData==nil) { return; }

        request.HTTPBody = createBodyWithParameters(param, filePathKey: "file", imageDataKey: imageData, boundary: boundary)

        myActivityIndicator.startAnimating();

        let task = NSURLSession.sharedSession().dataTaskWithRequest(request) {
            data, response, error in

            if error != nil {
                println("error=\(error)")
                return
            }

            // You can print out response object
            println("******* response = \(response)")

            // Print out reponse body
            let responseString = NSString(data: data, encoding: NSUTF8StringEncoding)
            println("****** response data = \(responseString!)")

            dispatch_async(dispatch_get_main_queue(),{
                self.myActivityIndicator.stopAnimating()
                //self.myImageView.image = nil;
            });

        }

        task.resume()

    }

    func createBodyWithParameters(parameters: [String: String]?, filePathKey: String?, imageDataKey: NSData, boundary: String) -> NSData {

        var body = NSMutableData();

        if parameters != nil {
            for (key, value) in parameters! {
                body.appendString("–-\(boundary)\r\n")
                body.appendString("Content-Disposition: form-data; name=\"\(key)\"\r\n\r\n")
                body.appendString("\(value)\r\n")
            }
        }

        let filename = "user-profile.jpg"

        let mimetype = "image/jpg"

        body.appendString("–-\(boundary)\r\n")
        body.appendString("Content-Disposition: form-data; name=\"\(filePathKey!)\"; filename=\"\(filename)\"\r\n")
        body.appendString("Content-Type: \(mimetype)\r\n\r\n")
        body.appendData(imageDataKey)
        body.appendString("\r\n")

        body.appendString("–-\(boundary)–-\r\n")

        return body
    }

    func generateBoundaryString() -> String {
        return "Boundary-\(NSUUID().UUIDString)"
    }

}

    extension NSMutableData {

    func appendString(string: String) {
        let data = string.dataUsingEncoding(NSUTF8StringEncoding, allowLossyConversion: true)
        appendData(data!)
    }





}