Uploading multiple images with other parameters in Swift

Question

Right now I've been uploading only one image to a server on a server side script through the code given below. Now I have an array of UIImage, I want to know how can I use UIImageJPEGRepresentation(myImageView.image!, 0.1) to post all the images in a UIImageView array?

func uploadImage()
{
    let postPictureUrl = NSURL(string: "http://www.23look.com/merchant/verify")
    let request = NSMutableURLRequest(URL: postPictureUrl!)
    request.HTTPMethod="POST"

    let param=[
        "mer_name" : shopNameUITF.text!,
        "mer_tel" : shopTelephoneUITF.text!,
        "mer_address" : shopAddressUITF.text!,
        "lat" : "39.6892",
        "lng" : "115.9239",
        "token": KeychainWrapper.stringForKey("tokenValue")!,
        "mer_type": "smalll"
    ]

    let abc =  KeychainWrapper.stringForKey("tokenValue")!

    let boundary = generateBoundaryString()

    request.setValue("multipart/form-data; boundary=\(boundary)", forHTTPHeaderField: "Content-Type")

    let imageData = UIImageJPEGRepresentation(myImageView.image!, 0.1)

    if imageData==nil { print("image data is nil"); return }

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

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

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

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

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

        do {

            let json = try NSJSONSerialization.JSONObjectWithData(data!, options: .MutableContainers) as? NSDictionary

            dispatch_async(dispatch_get_main_queue(), {
                print(NSString(data: data!, encoding:NSUTF8StringEncoding)!)
                print(json)
            })

        } catch let err {
            print(err)
        }
    }
    task.resume()
}

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

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
}

It takes following parameters:

mer_name - String

mer_tel - String

mer_address - string

lng - string

lat - string

mer_licence - file type (This is where my images will be uploaded)

token - string

mer_type - string

Answer 1

    doOnMain {
        Loading.sharedInstance.startloading()
    }
    let url = NSURL(string:"URL")
    let request = NSMutableURLRequest(url: url! as URL)
    request.httpMethod = "POST"
    let headers = ["Accept-Language": "en"]
    request.allHTTPHeaderFields = headers
    let boundary = generateBoundaryString()
    //define the multipart request type
    request.setValue("multipart/form-data; boundary=\(boundary)", forHTTPHeaderField: "Content-Type")

    if (imgRefund.image == nil){
        return
    }

    // First Image
    let image_data = imgRefund.image!.pngData()
    if(image_data == nil){
        return
    }

    // Second Image

    let image_data1 = imgRefund1.image!.pngData()
    if(image_data1 == nil){
        return
    }

    let body = NSMutableData()
    let fname = "filename"
    let fname1 = "filename1"
    let mimetype = "image/png"

    let parameters = ["key":"value","key":"value"]
    if parameters != nil {
        for (key, value) in parameters {
            body.append("--\(boundary)\r\n".data(using: String.Encoding.utf8)!)
            body.append("Content-Disposition: form-data; name=\"\(key)\"\r\n\r\n".data(using: String.Encoding.utf8)!)
            body.append("\(value)\r\n".data(using: String.Encoding.utf8)!)
        }
    }

    // First Image

    body.append("--\(boundary)\r\n".data(using: String.Encoding.utf8)!)
    body.append("Content-Disposition:form-data; name=\"test\"\r\n\r\n".data(using: String.Encoding.utf8)!)
    body.append("hi\r\n".data(using: String.Encoding.utf8)!)
    body.append("--\(boundary)\r\n".data(using: String.Encoding.utf8)!)
    body.append("Content-Disposition:form-data; name=\"parameter\"; filename=\"\(fname)\"\r\n".data(using: String.Encoding.utf8)!) // paramenter name
    body.append("Content-Type: \(mimetype)\r\n\r\n".data(using: String.Encoding.utf8)!)
    body.append(image_data!)
    body.append("\r\n".data(using: String.Encoding.utf8)!)
    body.append("--\(boundary)--\r\n".data(using: String.Encoding.utf8)!)


    // Second Image
    body.append("--\(boundary)\r\n".data(using: String.Encoding.utf8)!)
    body.append("Content-Disposition:form-data; name=\"test\"\r\n\r\n".data(using: String.Encoding.utf8)!)
    body.append("hi\r\n".data(using: String.Encoding.utf8)!)
    body.append("--\(boundary)\r\n".data(using: String.Encoding.utf8)!)
    body.append("Content-Disposition:form-data; name=\"parameter1\"; filename=\"\(fname1)\"\r\n".data(using: String.Encoding.utf8)!) // paramenter name 1
    body.append("Content-Type: \(mimetype)\r\n\r\n".data(using: String.Encoding.utf8)!)
    body.append(image_data1!)
    body.append("\r\n".data(using: String.Encoding.utf8)!)
    body.append("--\(boundary)--\r\n".data(using: String.Encoding.utf8)!)





    request.httpBody = body as Data

    let session = URLSession.shared
    let task = session.dataTask(with: request as URLRequest) {
        (
        data, response, error) in
        guard let _:NSData = data! as NSData, let _:URLResponse = response, error == nil else {
            print("error")
            return
        }
        let responseString = NSString(data: data!, encoding: String.Encoding.utf8.rawValue)
        print("****** response data = \(responseString!)")
        do {
            let json = try JSONSerialization.jsonObject(with: data!, options: []) as? NSDictionary
            print("****** response json = \(json!)")

            if(json?.value(forKey: "status") as! Int == 200){
                print(json)
            }
            else{

            }
        }catch{
            print(error)
        }
    }
    task.resume()

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

Answer 2

You should do changes in createBodyWithParameters like below.........

When you have multiple images...

  func createBodyWithParameters(parameters: NSMutableDictionary?,boundary: String) -> NSData {
    let body = NSMutableData()

    if parameters != nil {
        for (key, value) in parameters! {

            if(value is String || value is NSString){
                body.appendString("--\(boundary)\r\n")
                body.appendString("Content-Disposition: form-data; name=\"\(key)\"\r\n\r\n")
                body.appendString("\(value)\r\n")
            }
            else if(value is [UIImage]){
                var i = 0;
                for image in value as! [UIImage]{
                    let filename = "image\(i).jpg"
                    let data = UIImageJPEGRepresentation(image,1);
                    let mimetype = mimeTypeForPath(filename)

                    body.appendString("--\(boundary)\r\n")
                    body.appendString("Content-Disposition: form-data; name=\"\(key)\"; filename=\"\(filename)\"\r\n")
                    body.appendString("Content-Type: \(mimetype)\r\n\r\n")
                    body.appendData(data!)
                    body.appendString("\r\n")
                    i++;
                }


            }
        }
    }
    body.appendString("--\(boundary)--\r\n")
    //        NSLog("data %@",NSString(data: body, encoding: NSUTF8StringEncoding)!);
    return body
}

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

}

func mimeTypeForPath(path: String) -> String {
    let pathExtension = path.pathExtension
    var stringMimeType = "application/octet-stream";
    if let uti = UTTypeCreatePreferredIdentifierForTag(kUTTagClassFilenameExtension, pathExtension!, nil)?.takeRetainedValue() {
        if let mimetype = UTTypeCopyPreferredTagWithClass(uti, kUTTagClassMIMEType)?.takeRetainedValue() {
            stringMimeType = mimetype as NSString as String
        }
    }
    return stringMimeType;
}



func createRequest (param : NSMutableDictionary , strURL : String) -> NSURLRequest {

    let boundary = generateBoundaryString()

    let url = NSURL(string: strURL)
    let request = NSMutableURLRequest(URL: url!)

    request.setValue("multipart/form-data; boundary=\(boundary)", forHTTPHeaderField: "Content-Type")
    request.HTTPMethod = "POST"
    request.HTTPBody = createBodyWithParameters(param, boundary: boundary)

    return request
}