Multipart file/Images upload with parameters in Swift

AGUploadImageWebServices.swift

//
//  AGUploadImageWebServices.swift
//  BaseProject
//
//  Created by AshvinGudaliya on 27/02/18.
//  Copyright © 2018 AshvinGudaliya. All rights reserved.
//

import UIKit

struct AGImageStructInfo {
    var fileName: String
    var type: String
    var data: Data
}

class AGUploadImageWebServices {
    
    private let boundary = "Boundary-\(NSUUID().uuidString)"
    private var request: URLRequest?
    
    init(url: String, parameter param : [String: Any]) {
        
        guard let url = URL(string: url) else { return }
        request = URLRequest(url: url)
        request.httpMethod = "POST"
        request.setValue("multipart/form-data; boundary=\(boundary)", forHTTPHeaderField: "Content-Type")
        request.httpBody = createBody(with: param, boundary: boundary)
    }
    
    func responseJSON(completionHandler: @escaping ([String: Any]?, Error?) -> ()) {
        guard let request = request else { return }
        
        let task = URLSession.shared.dataTask(with: request) { data, response, error in
            
            guard let data = data, error == nil else {
                debugPrint("System error:- \(String(describing: error))")
                completionHandler(nil, error)
                return
            }
            
            let responseString = String(data: data, encoding: .utf8)
            print("responseString = \(String(describing: responseString))")
            
            DispatchQueue.main.async {
                do {
                    let dicResponse = try JSONSerialization.jsonObject(with: data, options: []) as?  [String: Any]
                    print("Response Dict:- \(String(describing: dicResponse))")
                    completionHandler(dicResponse, nil)
                } catch {
                    completionHandler(nil, error)
                    print("Response Error:- \(String(describing: error))")
                }
            }
        }
        
        task.resume()
    }

    internal func createBody(with parameters: [String: Any], boundary: String) -> Data {
        var body = Data()

        for (key, value) in parameters {
            if let imageInfo = value as? AGImageStructInfo {
                body.append("--\(boundary)\r\n")
                body.append("Content-Disposition: form-data; name=\"\(key)\"; filename=\"\(imageInfo.fileName)\"\r\n")
                body.append("Content-Type: \(imageInfo.type)\r\n\r\n")
                body.append(imageInfo.data)
                body.append("\r\n")
            }
            else if let imageInfo = value as? [AGImageStructInfo] {
                for image in imageInfo {
                    body.append("--\(boundary)\r\n")
                    body.append("Content-Disposition: form-data; name=\"\(key)\"; filename=\"\(image.fileName)\"\r\n")
                    body.append("Content-Type: \(image.type)\r\n\r\n")
                    body.append(image.data)
                    body.append("\r\n")
                }
            }
            else{
                body.append("--\(boundary)\r\n")
                body.append("Content-Disposition: form-data; name=\"\(key)\"\r\n\r\n")
                body.append("\(value)\r\n")
            }
        }
        
        body.append("--\(boundary)--\r\n")
        return body
    }
}

extension UIImage {
    func toData() -> Data{
        return UIImageJPEGRepresentation(self, 0.7)! as Data
    }
}

extension Data {
    
    mutating func append(_ string: String) {
        if let data = string.data(using: .utf8) {
            append(data)
        }
    }
}

You can call Like

let parameters: [String: Any] = [
    "Images": [AGImageStructInfo(fileName: "file1.jpeg", type: "image/jpeg", data: UIImage(named: "Image123")!.toData()), AGImageStructInfo(fileName: "file1.jpeg", type: "image/jpeg", data: UIImage(named: "Image123")!.toData())]
]

AGUploadImageWebServices(url: "https://url", parameter: parameters)
    .responseJSON { (json, eror) in
    
    debugPrint(json)
}

In initialiser the argument type of parameter should be [String:Any].
And you have request as private and in initialiser you have create a new variable request

Import below tow lines on starting of code otherwise it's giving error of undeclared variables. I import this tow lines and errors gone.

import Foundation
import UIKit

Thank You

How to upload multiple images using this?

@reenaphilip you can now upload multiple images using this.