Question

我有一个应用程序要求从python Web服务器接收Android应用程序中的数据。我已经设置了一个本地环境来首先测试，本地托管了一个python服务器。使用套接字创建连接，服务器套接字在Android应用程序上，客户端是python服务器。我基本上需要从服务器接收状态更新到应用程序，而不需要它（通过带有排球的POST，或类似改造的东西）。

对于机器人方面，我基本上按照此页面的帖子... https://thinkandroid.wordpress.com/2010/03/27/incorporating-socket-programming-into-your-applications/

这是python服务器中的客户端套接字......

@app.route('/clientMessage', methods=['GET', 'POST'])
def clientMessage():
    address = request.values.get('address')
    host = address
    port = 6667

    #create an INET, STREAMing socket
    s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    s.connect((host, port))

    #send message using socket
    s.sendall("please work\n")

    return "msg sent"

这是android MainActivity，其中包含侦听服务器套接字的线程

public class ServerThread implements Runnable {

    public void run() {
        try {
            if (SERVERIP != null) {
                handler.post(new Runnable() {
                    @Override
                    public void run() {
                        serverStatus.setText("Listening on IP: " + SERVERIP);

                    }
                });
                serverSocket = new ServerSocket(SERVERPORT);
                while (true) {
                    // LISTEN FOR INCOMING CLIENTS
                    Socket client = serverSocket.accept();
                    handler.post(new Runnable() {
                        @Override
                        public void run() {
                            serverStatus.setText("Connected.");
                        }
                    });

                    try {
                        BufferedReader in = new BufferedReader(new InputStreamReader(client.getInputStream()));
                        String line = null;
                        while ((line = in.readLine()) != null) {
                            Log.d("ServerActivity", line);
                            final String finalLine = line;
                            handler.post(new Runnable() {
                                @Override
                                public void run() {
                                    mainTextView.setText(finalLine);
                                }
                            });
                        }
                        break;
                    } catch (Exception e) {
                        handler.post(new Runnable() {
                            @Override
                            public void run() {
                                serverStatus.setText("Oops. Connection interrupted.");
                            }
                        });
                        e.printStackTrace();
                    }
                }
            } else {
                handler.post(new Runnable() {
                    @Override
                    public void run() {
                        serverStatus.setText("Couldn't detect internet connection.");
                    }
                });
            }
        } catch (Exception e) {
            handler.post(new Runnable() {
                @Override
                public void run() {
                    serverStatus.setText("Error");
                }
            });
            e.printStackTrace();
        }
    }
}

当Android手机与python服务器位于同一内部/本地网络时，工作正常。一旦我关闭无线，并连接4g，python吐出这个错误。如果有所作为，我正在使用mac。

~/Documents/androidProjects/pythonExamples$ python serverSockets.py
* Running on http://127.0.0.1:5000/ (Press CTRL+C to quit)
[2016-11-04 09:45:05,876] ERROR in app: Exception on /clientMessage [GET]
Traceback (most recent call last):
File "/Library/Python/2.7/site-packages/flask/app.py", line 1988, in wsgi_app
response = self.full_dispatch_request()
  File "/Library/Python/2.7/site-packages/flask/app.py", line 1641, in full_dispatch_request
rv = self.handle_user_exception(e)
  File "/Library/Python/2.7/site-packages/flask/app.py", line 1544, in handle_user_exception
reraise(exc_type, exc_value, tb)
  File "/Library/Python/2.7/site-packages/flask/app.py", line 1639, in full_dispatch_request
rv = self.dispatch_request()
  File "/Library/Python/2.7/site-packages/flask/app.py", line 1625, in dispatch_request
return self.view_functions[rule.endpoint](**req.view_args)
  File "serverSockets.py", line 66, in clientMessage
s.connect((host, port))
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/socket.py", line 228, in meth
return getattr(self._sock,name)(*args)
error: [Errno 51] Network is unreachable
127.0.0.1 - - [04/Nov/2016 09:45:05] "GET /clientMessage?address=100.74.228.97 HTTP/1.1" 500 -

我已经在我的路由器中转发了该端口，并且可以通过它ping网站，所以我知道流量从我的网络到网络，但我无法弄清楚为什么它无法到达Android设备。我也尝试了很多不同的端口，我可能需要使用一个特定的端口。这是我第一次玩套接字，我仍然是一个新手Android开发人员。我确定当我将它移动到heroku上托管的公共python服务器时，我将不得不更多地考虑安全性和ssl，但是任何人都可以告诉我为什么当它在公共网络上时无法到达Android设备？

Answer 1

如果您的Android设备处于移动连接状态，则无法从互联网上访问其上运行的服务器，因为您的移动服务提供商将阻止传入连接。

android serversocket 4g网络无法访问

1 个答案: