android websocket客户端超时

Question

android websocket客户端超时

Sag*_*kar 6 android client-server tornado websocket

谢谢阅读!

背景: 我正在为服务器开发一个Android客户端,其中需求是应用程序,需要与 WebSockets基于服务器的服务器来回连续交换消息.

实施:对于客户端,我使用weberknecht的 WebSocket Android客户端库,而服务器是Tornado基于.

问题: 目前,我祈求initWebSocketClient在onCreate通过生成的AsyncTask.但是,我一直收到客户端超时异常.

Android客户端:


private void initWebSocketClient() {
        Log.e(TAG, "initWebSocketClient");
        try {
            URI url = new URI("ws://192.168.207.84:8080/");
            WebSocket websocket = new WebSocketConnection(url);

            // Register Event Handlers
            websocket.setEventHandler(new WebSocketEventHandler() {
                    public void onOpen()
                    {
                            Log.e(TAG, "--open");
                    }

                    public void onMessage(WebSocketMessage message)
                    {
                            Log.e(TAG, "--received message: " + message.getText());
                    }

                    public void onClose()
                    {
                            Log.e(TAG, "--close"); 
                    }
            });

            // Establish WebSocket Connection
            websocket.connect();

            // Send UTF-8 Text
            websocket.send("hello world");

            // Close WebSocket Connection
            websocket.close();
        }
        catch (WebSocketException wse) {
                wse.printStackTrace();
        }
        catch (URISyntaxException use) {
                use.printStackTrace();
        }
    }

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龙卷风服务器:


#!/usr/bin/env python

import tornado.ioloop
import tornado.web
import tornado.websocket

class EchoWebSocketHandler(tornado.websocket.WebSocketHandler):
    def open(self):
        print "WebSocket opened"

    def on_message(self, message):
        self.write_message(u"You said: " + message)

    def on_close(self):
        print "WebSocket closed"

application = tornado.web.Application([
    (r"/", EchoWebSocketHandler),
])

if __name__ == "__main__":
    application.listen(8080)
    tornado.ioloop.IOLoop.instance().start()

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客户超时例外:


01-31 19:28:01.367: W/System.err(5668): de.roderick.weberknecht.WebSocketException: error while creating socket to ws://192.168.207.84:8080/
01-31 19:28:01.386: W/System.err(5668):     at de.roderick.weberknecht.WebSocketConnection.createSocket(WebSocketConnection.java:244)
01-31 19:28:01.386: W/System.err(5668):     at de.roderick.weberknecht.WebSocketConnection.connect(WebSocketConnection.java:83)
01-31 19:28:01.386: W/System.err(5668):     at com.sagar.websockclient.MainActivity.initWebSocketClient(MainActivity.java:55)
01-31 19:28:01.390: W/System.err(5668):     at com.sagar.websockclient.MainActivity.access$0(MainActivity.java:30)
01-31 19:28:01.390: W/System.err(5668):     at com.sagar.websockclient.MainActivity$WebSocketTask.doInBackground(MainActivity.java:75)
01-31 19:28:01.390: W/System.err(5668):     at com.sagar.websockclient.MainActivity$WebSocketTask.doInBackground(MainActivity.java:1)
01-31 19:28:01.390: W/System.err(5668):     at android.os.AsyncTask$2.call(AsyncTask.java:264)
01-31 19:28:01.390: W/System.err(5668):     at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
01-31 19:28:01.390: W/System.err(5668):     at java.util.concurrent.FutureTask.run(FutureTask.java:137)
01-31 19:28:01.390: W/System.err(5668):     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
01-31 19:28:01.390: W/System.err(5668):     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
01-31 19:28:01.390: W/System.err(5668):     at java.lang.Thread.run(Thread.java:856)
01-31 19:28:01.390: W/System.err(5668): Caused by: java.net.ConnectException: failed to connect to /192.168.207.84 (port 8080): connect failed: ETIMEDOUT (Connection timed out)
01-31 19:28:01.390: W/System.err(5668):     at libcore.io.IoBridge.connect(IoBridge.java:114)
01-31 19:28:01.394: W/System.err(5668):     at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:192)
01-31 19:28:01.394: W/System.err(5668):     at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
01-31 19:28:01.394: W/System.err(5668):     at java.net.Socket.startupSocket(Socket.java:566)
01-31 19:28:01.394: W/System.err(5668):     at java.net.Socket.tryAllAddresses(Socket.java:127)
01-31 19:28:01.394: W/System.err(5668):     at java.net.Socket.(Socket.java:177)
01-31 19:28:01.394: W/System.err(5668):     at java.net.Socket.(Socket.java:149)
01-31 19:28:01.394: W/System.err(5668):     at de.roderick.weberknecht.WebSocketConnection.createSocket(WebSocketConnection.java:238)
01-31 19:28:01.394: W/System.err(5668):     ... 11 more
01-31 19:28:01.394: W/System.err(5668): Caused by: libcore.io.ErrnoException: connect failed: ETIMEDOUT (Connection timed out)
01-31 19:28:01.398: W/System.err(5668):     at libcore.io.Posix.connect(Native Method)
01-31 19:28:01.398: W/System.err(5668):     at libcore.io.BlockGuardOs.connect(BlockGuardOs.java:85)
01-31 19:28:01.398: W/System.err(5668):     at libcore.io.IoBridge.connectErrno(IoBridge.java:127)
01-31 19:28:01.398: W/System.err(5668):     at libcore.io.IoBridge.connect(IoBridge.java:112)
01-31 19:28:01.398: W/System.err(5668):     ... 18 more

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有人可以帮帮我吗？

更新:添加AutoBahn(适用于Android的WebSocket客户端库)实现细节:

AutoBahn客户端


private void connect2() {
        mConnection = new WebSocketConnection();
        final String wsuri = "ws://192.168.0.137:8888/";
        String TAG = "ArticlesListActivity"; 

        try {
            mConnection.connect(wsuri, new WebSocketHandler() {
               @Override
               public void onOpen() {
                 Log.e(TAG, "Connected to: " + wsuri);
               }

               @Override
               public void onTextMessage(String payload) {
                  Log.e(TAG, "Message recieved = " + payload);
               }

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

            Log.d(TAG, e.toString());
         }      
    }

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使用此库 - 我能够立即连接到服务器,连接丢失.(请参阅下面的"AutoBahn客户端日志".切换回weberknecht工作正常.我没有明确地调用mConnection.disconnect()任何地方.所以我不知道连接是如何终止的.

AutoBahn客户端日志


02-27 14:27:36.605: D/de.tavendo.autobahn.WebSocketConnection(27701): created
02-27 14:27:36.656: D/dalvikvm(27701): GC_FOR_ALLOC freed 164K, 4% free 9247K/9543K, paused 17ms
02-27 14:27:36.671: D/dalvikvm(27701): GC_FOR_ALLOC freed 7K, 4% free 9368K/9735K, paused 14ms
02-27 14:27:36.671: D/de.tavendo.autobahn.WebSocketReader(27701): created
02-27 14:27:36.675: D/de.tavendo.autobahn.WebSocketConnection(27701): WS reader created and started
02-27 14:27:36.675: D/de.tavendo.autobahn.WebSocketReader(27701): running
02-27 14:27:36.675: D/de.tavendo.autobahn.WebSocketWriter(27701): created
02-27 14:27:36.675: D/de.tavendo.autobahn.WebSocketConnection(27701): WS writer created and started
02-27 14:27:36.769: D/de.tavendo.autobahn.WebSocketReader(27701): run() : ConnectionLost
02-27 14:27:36.773: D/de.tavendo.autobahn.WebSocketReader(27701): ended
02-27 14:27:36.777: D/de.tavendo.autobahn.WebSocketConnection(27701): opening handshake received
02-27 14:27:36.777: E/ArticlesListActivity(27701): Connected to: ws://192.168.0.137:8888/
02-27 14:27:36.781: D/de.tavendo.autobahn.WebSocketConnection(27701): fail connection [code = 3, reason = WebSockets connection lost
02-27 14:27:36.784: D/de.tavendo.autobahn.WebSocketReader(27701): quit
02-27 14:27:36.788: D/de.tavendo.autobahn.WebSocketWriter(27701): ended
02-27 14:27:36.792: E/ArticlesListActivity(27701): Connection Lost.
02-27 14:27:36.792: D/de.tavendo.autobahn.WebSocketConnection(27701): worker threads stopped

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Answer 1

Mar*_*nto 5

以下是我将如何开始对此进行故障排除:

您是否尝试在手机(设备)或模拟器上执行此操作？如果您尝试在手机上执行此操作并通过3G连接,则不会发生这种情况.在这种情况下,您尝试从WAN 连接到无法正常工作的内部 IP地址.
再假设您在设备上执行此操作,如果您通过Wifi连接,那么这是另一个故事.确保服务器可以达到的192.168.207.84:8080.一种快速测试连接的方法(来自您的PC):
```
telnet 192.168.207.84 8080
```
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如果超时,您知道您的服务器没有响应.当然,这假设您的PC 与 Wifi网络位于同一子网中.
如果您尝试从模拟器执行此操作,请按照[2]中的步骤确保服务器可访问,并确保模拟器处于(IP)桥接模式.

总之,主要的原因超时通常发生是因为缺乏服务器的可用性(即缺少连接).您没有提到网络的详细信息,因此我根据您尝试连接的IP(192.168.207.84)做了一些假设.

Answer 2

obe*_*tet 5

据我所知,Weberknecht只支持Hybi-10,而不是最终的RFC6455规范,更有问题的是,它是否在主(UI)线程上进行联网.这通常是一个坏主意,并且将在Android> 2上失败.

对于Android原生应用程序,有适用于Android的Autobahn WebSockets

https://github.com/oberstet/AutobahnAndroid

它支持最终的RFC6455,与UI和服务应用程序集成良好,通过WebSockets提供RPC和PubSub等.在GitHub上查看项目README.

免责声明:我是高速公路的作者.

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