"Stream在打开之前发送一个事件"

Question

我正在尝试使用Swift发出SOAP请求.从9/9/14开始运行最新的Xcode/iOS.我使用的NSMutableURLRequest是我将HTTPBody添加到请求信息中.但是,一旦我启动NSURLConnection了请求,我收到一个错误"Stream xxxxxxxxx在打开之前发送一个事件".我没有使用任何网络库,只是一个普通的老库NSURLConnection.有什么可能导致这个错误的想法？谢谢!

使用中的相关代码:

func createSOAPRequestWithEnvelope(soapEnvelope : String) {
    //create request
    var url = NSURL(string: "https://my-service-url")
    var req = NSMutableURLRequest(URL: url, cachePolicy: NSURLRequestCachePolicy.UseProtocolCachePolicy, timeoutInterval: 5000)

    req.addValue("text/xml",    forHTTPHeaderField: "Content-Type")
    req.HTTPMethod = "POST"
    req.HTTPBody = soapEnvelope.dataUsingEncoding(NSUTF8StringEncoding)

    //begin connection
    var connection = NSURLConnection(request: req, delegate: self, startImmediately: false)
    connection.scheduleInRunLoop(NSRunLoop.mainRunLoop(), forMode: NSDefaultRunLoopMode)

    connection.start() //error happens after this command :(
}

//takes care of NTLM Authentication
func connection(connection: NSURLConnection!, didReceiveAuthenticationChallenge challenge: NSURLAuthenticationChallenge!) {
    var authMethod = challenge.protectionSpace.authenticationMethod

    if authMethod == NSURLAuthenticationMethodNTLM {
        var credential = NSURLCredential(user: self.username,
            password: self.password,
            persistence: NSURLCredentialPersistence.ForSession)

        challenge.sender.useCredential(credential, forAuthenticationChallenge: challenge)
    }
}

func connection(connection: NSURLConnection!, didReceiveResponse response: NSURLResponse!) {
    // Response received, clear out data
    self.transactionData = NSMutableData()
}

func connection(connection: NSURLConnection!, didReceiveData data: NSData!) {
    // Store received data
    self.transactionData?.appendData(data)
}

Answer 1

Stream not Open 的问题似乎直接是 CFNetwork 实现的问题。（使用 NSConnection 和 NSSession 时可以重现）。它发生在需要分块的请求（响应）上。此问题的一个副作用是 Windows 身份验证无法正常工作，每个请求都需要经过完整的握手过程。iOS 8.1 中也没有修复。