带有Android和浏览器客户端的节点服务器

时间:2012-07-09 14:26:36

标签: android node.js websocket autobahn

编辑: 我想通过Web Interface在Android和Browser上实现一个测验应用程序。 我正在寻找一种在服务器和客户端之间进行通信的方法。我试过socket.io但是无法使用android。

我正在使用在nodester(nodester.com)上托管的node.js服务器。 我尝试了一些库,但无法使其正常工作。

我现在正在与https://github.com/einaros/ws

的einaros / ws合作

服务器代码是:

var clients = [],
numClients = 0;


var WebSocketServer = require('ws').Server,
  wss = new WebSocketServer({port: 20083});

wss.on('connection', function(ws) {

  ws.on('message', function(message) {
    console.log(wss.clients);
    console.log('received: %s', message);
    incomingMessage(message, ws)
  });

  /*
  ws.on('eigenesEvent', function(message) {
    console.log('eigenes Event ausgelöst: ' + message);
  });
  */
});

function incomingMessage(msg, ws) {
  //console.log(wss.clients);
  var obj = JSON.parse(msg);

    if(obj.type == "connect") {

      for(var i=0;i<clients.length;i++) {
        if(clients[i] == obj.id) {
          ws.send(JSON.stringify({
            to: obj.id,
            message: "name vergeben"
          }));
          return;
        }
      }
      clients[numClients] = obj.id;
      numClients++;
      for(var i=0;i<clients.length;i++) {
        console.log("Client" + i + ": " + clients[i]);
      }
      ws.send(JSON.stringify({
          to: "all",
          message: obj.id + " connected"
      }));
    }

  if(obj.type == "disconnect") {

    for(var i=0;i<clients.length;i++) {
      if(clients[i] == obj.id) {
        clients.splice(i, 1);
        numClients--;
        for(var i=0;i<clients.length;i++) {
          console.log("Client" + i + ": " + clients[i]);
        }
      }
    }

    ws.send(JSON.stringify({
      to: "all",
      message: obj.id + " disconnected"
    }));
    return;
  }

  if(obj.type == "answer") {
    if("id" in obj) {
      if(obj.answer == "a") {
        ws.send(JSON.stringify({
          to: obj.id,
          message: "a is correct"
        }));
      } else {
        ws.send(JSON.stringify({
          to: obj.id,
          message: "answer is incorrect"
        }));
      }
    }
  }

  if(obj.type == "something") {
    if("id" in obj) {
      ws.send(JSON.stringify({
        to: obj.id,
        message: "received: " + obj.message
      }));
    }
  }
}



从HTML站点我可以通过以下方式连接到服务器:

connect = function() {
    var host = "ws://einaros.nodester.com";

        try{
            socket = new WebSocket(host);
            console.log('WebSocket - status ' + socket.readyState);

            socket.onopen = function(msg) {
                console.log("Welcome - status " + this.readyState);
                socket.send(JSON.stringify({
                    id: model.getClientName(),
                    type: "connect"
                }));
                model.setConnectionStatus(true);
            };

            socket.onmessage = function(msg) {
                console.log("onmessage - msg: " + msg.data);
                checkMessage(msg.data);
            };

            socket.onclose = function(msg) {
                console.log("Disconnected - status " + this.readyState);
                model.setConnectionStatus(false);
            };

        }
        catch(ex){
            console.log(ex);
        }
},



在Android-Client方面,我使用的是来自http://autobahn.ws/android的AutobahnAndroid android的客户端代码是:

package ps.mediengestaltung;

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import de.tavendo.autobahn.WebSocketConnection;
import de.tavendo.autobahn.WebSocketException;
import de.tavendo.autobahn.WebSocketHandler;


public class MainActivity extends Activity {



public final WebSocketConnection mConnection = new WebSocketConnection();

@Override
public void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);

    setContentView(R.layout.main);


    final String wsuri = "ws://einaros.nodester.com";

    try {
        mConnection.connect(wsuri, new WebSocketHandler() {

            @Override
            public void onOpen() {
                Log.d("TAG", "Status: Connected to " + wsuri);
                mConnection.sendTextMessage("Hello Server!");
            }

            @Override
            public void onTextMessage(String payload) {
                Log.d("TAG", "Got echo: " + payload);
            }

            @Override
            public void onClose(int code, String reason) {
                Log.d("TAG", "Connection lost.");
            }
        });
    } catch (WebSocketException e) {
        Log.d("TAG", e.toString());
    }

}

}


在LogCat我得到:
08-01 08:48:13.017:D / TAG(704):状态:已连接至ws://einaros.nodester.com
08-01 08:48:13.167:D / TAG(704):连接丢失。


我究竟做错了什么?任何提示?

2 个答案:

答案 0 :(得分:2)

原因可能是:Weberknecht只实现了(过时的)Hixie-76版本的WebSocket。

您可以尝试AutobahnAndroid,它实现了WebSocket的最终RFC6455版本。

另一件事:您正在使用的WebSocket服务器不再维护(据我所知)。它也只实现了Hixie-76-- Chrome / Firefox不再支持它。

尝试以下方法之一:

免责声明:我是高速公路的作者并为Tavendo工作。

答案 1 :(得分:1)

您要求手机连接到本地主机。你没有在手机上运行节点吗? :)

URI url = new URI("ws://127.0.0.1:8080/test");

这应该指向您的nodeter地址/端口。