How to execute alamofire background upload request?

Question

I need to send zip file to server side.

There is my request which I need to work in background

let configuration = URLSessionConfiguration.default
             


        

Answer 1

Use below code once, Its working for me

import Alamofire

var sessionManager: Alamofire.SessionManager
var backgroundSessionManager: Alamofire.SessionManager 
self.sessionManager = Alamofire.SessionManager(configuration: URLSessionConfiguration.default)
self.backgroundSessionManager = Alamofire.SessionManager(configuration: URLSessionConfiguration.background(withIdentifier: "com.youApp.identifier.backgroundtransfer"))


backgroundSessionManager.upload(multipartFormData: blockFormData!, usingThreshold: UInt64.init(), to: url, method: .post, headers: APIManager.headers(), encodingCompletion: { encodingResult in
switch encodingResult {
case .success(let upload, _, _):
    upload.uploadProgress {
        (progress) in
        let p = progress.fractionCompleted * 100
        uploadProgress(p)
    }
    upload.responseJSON { response in
        switch(response.result) {
        case .success(let JSON):
            DispatchQueue.main.async {
                    print(JSON)
            }
        case .failure(let error):
            DispatchQueue.main.async {
                print(error)
            }
        }
    }
case .failure(let error):
    DispatchQueue.main.async {
        print(error)
    }
}
})

Answer 2

did you see this section Open Radars:

Open Radars

The following radars have some effect on the current implementation of Alamofire.

rdar://26870455 - Background URL Session Configurations do not work in the simulator

Answer 3

from Background Transfer Considerations :

Only upload tasks from a file are supported (uploading from data objects or a stream will fail after the program exits).

that means it is limitation from NSURLSession - you need you upload from a file and then try to solve the other error with file

Update

appDeligate.log.debug("request was sended")

let tempZipFilePath = UtilDirectory.tempZipPath.tweak()

alamoFireManager.upload(tempZipFilePath,
                        to: deligate.url,
                        method: .post,
                        headers: headers)