NSURLSessionUploadTask如何读取服务器响应

Question

我正在使用NSURLSessionUploadTask上传一个文件。

下面是我的一些代码不完整的部分

let session:NSURLSession = NSURLSession(configuration: config, delegate: self, delegateQueue: NSOperationQueue .mainQueue())

let sessionTask:NSURLSessionUploadTask = session.uploadTaskWithStreamedRequest(request

但问题是，我无法获得服务器发送的JSON响应。

下面的委托也没有启动，但其他委托正在启动。

func URLSession(session: NSURLSession, dataTask: NSURLSessionDataTask, didReceiveData data: NSData)

我正在使用的代码：

func sendFileToServer1(fileName:String,fileData:NSData,serverURL:String){

let body = NSMutableData()

let mimetype = "application/octet-stream"
//        let mimetype = "video/quicktime"

let boundary = "Boundary-\(NSUUID().UUIDString)"
let url = NSURL(string: serverURL)

let request = NSMutableURLRequest(URL: url!)
request.HTTPMethod = "POST"
request.setValue("multipart/form-data; boundary=----\(boundary)", forHTTPHeaderField: "Content-Type")
body.appendData("------\(boundary)\r\n".dataUsingEncoding(NSUTF8StringEncoding)!)
body.appendData("Content-Disposition:form-data; name=\"file\"; filename=\"\(fileName)\"\r\n".dataUsingEncoding(NSUTF8StringEncoding)!)
body.appendData("Content-Type: \(mimetype)\r\n\r\n".dataUsingEncoding(NSUTF8StringEncoding)!)
body.appendData(fileData)
body.appendData("\r\n".dataUsingEncoding(NSUTF8StringEncoding)!)
body.appendData("------\(boundary)\r\n".dataUsingEncoding(NSUTF8StringEncoding)!)
body.appendData("Content-Disposition:form-data; name=\"submit\"\r\n\r\n".dataUsingEncoding(NSUTF8StringEncoding)!)
body.appendData("Submit\r\n".dataUsingEncoding(NSUTF8StringEncoding)!)
body.appendData("------\(boundary)--\r\n".dataUsingEncoding(NSUTF8StringEncoding)!)
request.HTTPBody=body

let config:NSURLSessionConfiguration = NSURLSessionConfiguration.defaultSessionConfiguration()
let session:NSURLSession = NSURLSession(configuration: config, delegate: self, delegateQueue: NSOperationQueue .mainQueue())
let sessionTask:NSURLSessionUploadTask = session.uploadTaskWithStreamedRequest(request)
sessionTask.resume()
}

func URLSession(session: NSURLSession, didBecomeInvalidWithError error: NSError?) {
    print("error")
 }

func URLSession(session: NSURLSession, task: NSURLSessionTask, didSendBodyData bytesSent: Int64, totalBytesSent: Int64, totalBytesExpectedToSend: Int64) {
    print("Bytes sent:\(bytesSent) Total bytes sent:\(totalBytesSent) Total bytes expected to send:\(totalBytesExpectedToSend)")
}

func URLSession(session: NSURLSession, dataTask: NSURLSessionDataTask, didReceiveResponse response: NSURLResponse, completionHandler: (NSURLSessionResponseDisposition) -> Void) {
    print("response:\(response as! NSHTTPURLResponse)")
}

func URLSession(session: NSURLSession, dataTask: NSURLSessionDataTask, didReceiveData data: NSData) {
    print("data didReceiveData")
}

我已同意代表们的意见。

1. NSURLSessionDataDelegate
2. NSURLSessionDelegate
3. NSURLSessionTaskDelegate

谢谢

Answer 1

由于NSURLSessionUploadTask是NSURLSessionDataTask的子类，所以可以尝试使用来自NSURLSessionDataDelegate的方法

func urlSession(_ session: NSURLSession, dataTask: NSURLSessionDataTask, didReceive response: NSURLResponse, completionHandler: (NSURLSession.ResponseDisposition) -> Void)

根据文件：

通知委托，数据任务从服务器接收到初始答复(标头)。