Question

我有一个作为服务器运行的.NET桌面程序，我正在尝试在iOS中实现我的客户端程序的端口，但是我从NSSocket获得了一些奇怪的行为。这是服务器的相关代码。

public NetworkListener()
{
    _Stream = new MemoryStream();
    _tcpServer = new TcpListener(System.Net.IPAddress.Any, 8086);
    _endPoints = new List<EndPoint>();
}

public void BeginListening()
{
    _tcpServer.Start();
    _workerThread = new Thread(new ThreadStart(WorkerLoop));
    _workerThread.IsBackground = true;
    _workerThread.Start();
}

private void WorkerLoop()
{
    while(true)
    {
        _clientSocket = _tcpServer.AcceptSocket();
        _networkStream = new NetworkStream(_clientSocket, true);
        /* ... rest of method here ... */
    }
}

我在iOSSimulator中使用XCode 4.2并以iOS 5为目标尝试以下代码。托管模拟器的Mac与服务器程序位于同一网络上，我可以运行使用相同硬编码本地IP的Java客户端如下连接就好了。在Objective C代码中，我收到一些数据并将其存储在NSData成员属性中，然后打开Socket后，我使用流回调告诉我何时尝试发送数据。

- (IBAction)connectToServer  
{
    NSURL *serverUrl = [NSURL URLWithString:@"10.0.0.5"];

    CFReadStreamRef readStream;
    CFWriteStreamRef writeStream;
    CFStreamCreatePairWithSocketToHost(NULL, (CFStringRef)[serverUrl host], 8086, &readStream, &writeStream);

    [self setInStream:(NSInputStream *)readStream];
    [self setOutStream:(NSOutputStream *)writeStream];
    [self.inStream setDelegate:self];
    [self.outStream setDelegate:self];
    [self.inStream scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];
    [self.outStream scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];
    [self.inStream open];
    [self.outStream open];

    NSError *error = [self.outStream streamError];
    if (error) {
        NSLog(@"outstream error: %@", [error localizedDescription]);
    }
}

- (void)stream:(NSStream *)aStream handleEvent:(NSStreamEvent)eventCode
{
    NSError *error;
    if ([aStream isEqual:outStream]) {
        switch (eventCode) {
            case NSStreamEventHasSpaceAvailable:
                NSLog(@"Stream has space!");
                [self writeDataToStream];
                break;
            case NSStreamEventOpenCompleted:
                NSLog(@"Stream is open!");
                break;
            case NSStreamEventErrorOccurred:
                error = [self.outStream streamError];
                NSLog(@"Stream error occured: %@", [error localizedDescription]);
                break;
            default:
                break;
        }
    }
}

- (void)writeDataToStream
{
    unsigned int byteIndex = 0;
    unsigned int length = data.length;
    uint8_t *buffer = (uint8_t *)[data bytes];

    while (byteIndex <= length) {    
        unsigned int bufferLength = (length - byteIndex >= 1024) ? 1024 : (length - byteIndex);
        uint8_t tempBuffer[bufferLength];

        (void)memcpy(tempBuffer, buffer, bufferLength);
        if (self.outStream.hasSpaceAvailable) {
            bufferLength = [self.outStream write:tempBuffer maxLength:bufferLength];
            byteIndex += bufferLength;
        } else
            NSLog(@"Stream is blocked!");
    }
}

在XCode控制台中，我看到“Stream is open！”，然后是“Stream has space！”，然后是一个异常，上面写着“操作无法完成。错误的文件描述符”。我在_tcpServer.AcceptSocket()之后立即在我的服务器代码中放置了一个断点，但它从未命中过。似乎流打开了，但套接字永远不会连接？

Answer 1

尝试检查[serverUrl host]是否为nil。

我也遇到了这个问题，所以我所做的是在IP地址（http://）之前添加URLWithString:@"http://10.0.0.5"协议字符串。

iOS和.NET之间的套接字问题？

1 个答案: