All geek questions in one place

URLSessionUploadTask is automatically canceled

I have this strange problem in which the newly created one is instantly canceled URLSessionUploadTask. I'm not sure if this is a bug with the current beta version of Xcode 8.

I suspect that this may be a mistake, because the code I'm going to publish went through exactly exactly once. After that, no changes were made, and then it just stopped working. Yes, he literally ran once, and then he stopped working. I will send an error at the end.

I will post the code below, but first I will describe how this logic works.

My test or user API (IE for use in playgrounds or directly in applications) calls the method authorize. This method authorize, in turn, will call buildPOSTTaskwhich will build a valid URL and return URLSessionUploadTaskwhich will be used by the method authorize.

With that said, the code below:

Session:

internal let urlSession = URLSession(configuration: .default)

Function to create a download task:

internal func buildPOSTTask(onURLSession urlSession: URLSession, appendingPath path: String, withPostParameters postParams: [String : String]?, getParameters getParams: [String : String]?, httpHeaders: [String : String]?, completionHandler completion: URLSessionUploadTaskCompletionHandler) -> URLSessionUploadTask {
    let fullURL: URL
    if let gets = getParams {
        fullURL = buildURL(appendingPath: path, withGetParameters: gets)
    } else {
        fullURL = URL(string: path, relativeTo: baseURL)!
    }

    var request = URLRequest(url: fullURL)
    request.httpMethod = "POST"

    var postParameters: Data? = nil

    if let posts = postParams {
        do {
            postParameters = try JSONSerialization.data(withJSONObject: posts, options: [])
        } catch let error as NSError {
            fatalError("[\(#function) \(#line)]: Could not build POST task: \(error.localizedDescription)")
        }
    }

    let postTask = urlSession.uploadTask(with: request, from: postParameters, completionHandler: completion)
    return postTask
}

An authentication function that uses the task created by the above function:

    public func authorize(withCode code: String?, completion: AccessTokenExchangeCompletionHandler) {

// I have removed a lot of irrelevant code here, such as the dictionary building code, to make this snippet shorter.

        let obtainTokenTask = buildPOSTTask(onURLSession: self.urlSession, appendingPath: "auth/access_token", withPostParameters: nil, getParameters: body, httpHeaders: nil) { (data, response, error) in
            if let err = error {
                completion(error: err)
            } else {
                print("Response is \(response)")
                completion(error: nil)
            }
        }

        obtainTokenTask.resume()
    }

I caught this error in a test:

let testUser = Anilist(grantType: grant, name: "Test Session")

let exp = expectation(withDescription: "Waiting for authorization")

testUser.authorize(withCode: "a valid code") { (error) in
    if let er = error {
        XCTFail("Authentication error: \(er.localizedDescription)")
    }
    exp.fulfill()
}
self.waitForExpectations(withTimeout: 5) { (err) in
    if let error = err {
        XCTFail(error.localizedDescription)
    }
}

An error always occurs with this error:

= NSURLErrorDomain Code = -999 "" UserInfo = {NSErrorFailingURLKey = https://anilist.co/api/auth/access_token?client_secret=REMOVED&grant_type=authorization_code&redirect_uri=genericwebsitethatshouldntexist.bo&client_id=ibanez- hod6w & = REMOVED, NSLocalizedDescription = , NSErrorFailingURLStringKey = https://anilist.co/api/auth/access_token?client_secret=REMOVED&grant_type=authorization_code&redirect_uri=genericwebsitethatshouldntexist.bo&client_id=ibanez-hod6w&code=REMOVED}

, :

  • URL, , .
  • .
  • "" , . , .
  • . .

, :

  • , , , reset . .
  • Mac...
  • , - , , cancel, authorize, , buildPOSTTask, . .

, ( , ):

  • . iOS 10 iPad, iOS 10. EDIT: , .

, . , , .

EDIT:

. , , API, , .

ALCKit

+4
3

6 , , , , .

, - from: uploadTask(with:from:completionHandler) . , Data, , . , Apple, , , .

, , - buildPOSTTask, , . :

internal func buildPOSTTask(onURLSession urlSession: URLSession, appendingPath path: String, withPostParameters postParams: [String : String]?, getParameters getParams: [String : String]?, httpHeaders: [String : String]?, completionHandler completion: URLSessionUploadTaskCompletionHandler) -> URLSessionUploadTask {
    let fullURL: URL
    if let gets = getParams {
        fullURL = buildURL(appendingPath: path, withGetParameters: gets)
    } else {
        fullURL = URL(string: path, relativeTo: baseURL)!
    }

    var request = URLRequest(url: fullURL)
    request.httpMethod = "POST"

    var postParameters: Data

    if let posts = postParams {
        do {
            postParameters = try JSONSerialization.data(withJSONObject: posts, options: [])
        } catch let error as NSError {
            fatalError("[\(#function) \(#line)]: Could not build POST task: \(error.localizedDescription)")
        }
    } else {
        postParameters = Data()
    }

    let postTask = urlSession.uploadTask(with: request, from: postParameters, completionHandler: completion)
    return postTask
}
+6

.

tcp_connection_cancel 1
nw_socket_handle_socket_event Event mask: 0x4
nw_socket_handle_socket_event Socket received WRITE_CLOSE event
nw_endpoint_handler_cancel [1 anilist.co:443 ready resolver (satisfied)]
nw_endpoint_handler_cancel [1.1 104.28.1.44:443 ready socket-flow (satisfied)]
__nw_socket_service_writes_block_invoke sendmsg(fd 9, 31 bytes): socket has been closed
nw_endpoint_flow_protocol_error [1.1
104.28.1.44:443 cancelled socket-flow (null)] Socket protocol sent error: [32] Broken pipe
nw_endpoint_flow_protocol_disconnected [1.1 104.28.1.44:443 cancelled socket-flow (null)] Output protocol disconnected
nw_endpoint_handler_cancel [1.2 104.28.0.44:443 initial path (null)] 
nw_resolver_cancel_on_queue 0x60800010da40
[NWConcrete_tcp_connection dealloc] 1
[User Defaults] CFPrefsPlistSource<0x6180000f8700> (Domain: XIO.PrivateAPITest, User: kCFPreferencesCurrentUser, ByHost: No, Container: (null)) is waiting for writes to complete so it can determine if new data is available

.

. SSL- . , .

class WTF : NSObject, URLSessionDelegate {

    var urlSession: URLSession!

    override init() {
        super.init()

        urlSession = URLSession(configuration: .default, delegate: self, delegateQueue: nil)

        var request = URLRequest(url: URL(string: "https://anilist.co/api/auth/access_token?client_secret=REMOVED&grant_type=authorization_code&redirect_uri=genericwebsitethatshouldntexist.bo&client_id=ibanez-hod6w&code=REMOVED")!)
        request.httpMethod = "POST"

        let data = try! JSONSerialization.data(withJSONObject: ["Test":"Test"], options: [])

        urlSession.uploadTask(with: request, from: data).resume()
    }

    func urlSession(_ session: URLSession, didReceive challenge: URLAuthenticationChallenge, completionHandler: (URLSession.AuthChallengeDisposition, URLCredential?) -> Void) {

        completionHandler(.performDefaultHandling, nil)

    }

    func urlSession(_ session: URLSession, task: URLSessionTask, didSendBodyData bytesSent: Int64, totalBytesSent: Int64, totalBytesExpectedToSend: Int64) {

    }

    func urlSession(_ session: URLSession, task: URLSessionTask, didCompleteWithError error: NSError?) {

    }

    func urlSession(_ session: URLSession, task: URLSessionTask, willPerformHTTPRedirection response: HTTPURLResponse, newRequest request: URLRequest, completionHandler: (URLRequest?) -> Void) {

        completionHandler(request)

    }

    func urlSession(_ session: URLSession, dataTask: URLSessionDataTask, didReceive response: URLResponse, completionHandler: (URLSession.ResponseDisposition) -> Void) {

        completionHandler(.allow)

    }

    func urlSession(_ session: URLSession, dataTask: URLSessionDataTask, didReceive data: Data) {

    }
}
0

Do you happen to use a third-party library like Ensighten? I had the same problem in Xcode 8 beta (works fine in Xcode 7), and all my blocks with nil parameters cause crashes. It turns out that it is the library that causes some encoding that causes the problem.

0
source

Source: https://habr.com/ru/post/1648060/

More articles:


All Articles