[英]Socket always time out with Android Libraries
即使在服務器(Java Server)上使用之前調用的ServerSocket.Accpet(),Android中的套接字也不會連接,來自客戶端(Android設備)的連接已接收並被接受,但客戶端永遠不會知道並保持超時。
這是服務器代碼,它在iOS上使用CocoaAsync庫並在開放端口上運行,並且在客戶端嘗試連接時打印“從...接受的套接字”,因此其連接和請求處理程序只是一個處理每個讀取的類。客戶端,在接受一個之后,它將再次循環並在serverSocket.Accpet()上等待另一個客戶端:
ServerSocket serverSocket = null;
Socket socket = null;
serverSocket = new ServerSocket(PORT);
logger.info("started socket server on 127.0.0.1:" + PORT);
while (true) {
try {
logger.info("waiting to receive connection ...");
socket = serverSocket.accept();
logger.info("socket accepted from " + socket.getInetAddress().getHostAddress());
} catch (IOException e) {
System.out.println("I/O error: " + e);
}
// new thread for a client
RequestHandler t = new RequestHandler(socket);
t.start();
}
Android方面:
在manifest <uses-permission android:name="android.permission.INTERNET" />
使用Socket-io保持打印超時,連接錯誤,重新連接,...
IO.Options options = new IO.Options();
options.forceNew = true;
options.transports = new String[]{WebSocket.NAME};
try {
socket = IO.socket(IP,options); //ip with port
socket.connect();
socket.on(Socket.EVENT_CONNECT, new Emitter.Listener() {
@Override
public void call(Object... args) {
Utils.Log("Socket EVENT_CONNECT", API.class);
}
}).on(Socket.EVENT_DISCONNECT, new Emitter.Listener() {
@Override
public void call(Object... args) {
Utils.Log("Socket EVENT_DISCONNECT", API.class);
}
}).on(Socket.EVENT_CONNECT_ERROR, new Emitter.Listener() {
@Override
public void call(Object... args) {
Utils.Log("Socket EVENT_CONNECT_ERROR", API.class);
}
}).on(Socket.EVENT_CONNECT_TIMEOUT, new Emitter.Listener() {
@Override
public void call(Object... args) {
Utils.Log("Socket EVENT_CONNECT_TIMEOUT", API.class);
}
}).on(Socket.EVENT_RECONNECT_ERROR, new Emitter.Listener() {
@Override
public void call(Object... args) {
Utils.Log("Socket EVENT_RECONNECT_ERROR", API.class);
}
})
.on(Socket.EVENT_RECONNECT_FAILED, new Emitter.Listener() {
@Override
public void call(Object... args) {
Utils.Log("Socket EVENT_RECONNECT_FAILED", API.class);
}
}).on(Socket.EVENT_RECONNECTING, new Emitter.Listener() {
@Override
public void call(Object... args) {
Utils.Log("Socket EVENT_RECONNECTING", API.class);
}
}).on(Socket.EVENT_CONNECT_TIMEOUT, new Emitter.Listener() {
@Override
public void call(Object... args) {
Utils.Log("Socket EVENT_CONNECT_TIMEOUT", API.class);
}
}).on(Socket.EVENT_MESSAGE, new Emitter.Listener() {
@Override
public void call(Object... args) {
Utils.Log("Socket EVENT_MESSAGE", API.class);
}
});
} catch (URISyntaxException e) {
e.printStackTrace();
}
使用AsyncAndroid也會超時
AsyncHttpClient.getDefaultInstance().websocket(IP, "my-protocol", new AsyncHttpClient.WebSocketConnectCallback() {
@Override
public void onCompleted(Exception ex, WebSocket webSocket) {
if (ex != null) {
ex.printStackTrace();
return;
}
webSocket.setEndCallback(new CompletedCallback() {
@Override
public void onCompleted(Exception ex) {
Utils.Log("Socket EndCallback", API.class);
}
});
webSocket.setClosedCallback(new CompletedCallback() {
@Override
public void onCompleted(Exception ex) {
Utils.Log("Socket ClosedCallback", API.class);
}
});
webSocket.setStringCallback(new WebSocket.StringCallback() {
public void onStringAvailable(String s) {
Utils.Log("Socket setStringCallback", API.class);
}
});
webSocket.setDataCallback(new DataCallback() {
public void onDataAvailable(DataEmitter emitter, ByteBufferList byteBufferList) {
Utils.Log("Socket DataCallback", API.class);
byteBufferList.recycle();
}
});
}
});
,嘗試了rxWebSocket,OkSocket,nv-websocket-client和其他一些具有相同結果的庫,請記住我可以使用Java.net簡單套接字連接到服務器,也可以使用iOS。
在Android 8.1設備和模擬器上測試提前感謝。
更新:我想出了2個帶有2個庫的解決方案,稍后會發布
這是我用AsyncAndroid提出的代碼,其中server,currentSocket,isConnected,isConnecting,sessionReloaded(你可能不需要它)是發送請求的靜態變量我只是調用connectSocket(..)如果套接字是連接的“返回currentSocket“變量,因此可以將其寫入並在DataCallBack處理讀取過程,或者將請求或您要寫入套接字的任何內容添加到pendingList並嘗試連接然后寫入所有掛起。 (在我的情況下,在連接之后寫入的第一件事是會話,所以你可能會忽略這種模式,你可能有自己的關於請求被卡住(待定)在連接套接字后面的政策來做你想做的事情,這只是模式我使用但除此之外是常見的事情)
public static void connectSocket(onSocketConnectionListener listener) {
if (server == null) {
server = new AsyncServer();
}
if (server.isRunning()) {
if (listener != null)
listener.connected(currentSocket);
return;
}
ConnectCallback socketCallBack = new ConnectCallback() {
@Override
public void onConnectCompleted(Exception ex, AsyncSocket socket) {
isConnecting = false;
if (ex != null) {
server.stop();
sessionReloaded = false;
Utils.Log("Exception = " + ex.getCause() + " , Server Running State = " + server.isRunning(), API.class);
A.runOnUiThread(new Runnable() {
@Override
public void run() {
new android.os.Handler().postDelayed(new Runnable() {
@Override
public void run() {
connectSocket(null);
}
}, 3000);
}
});
return;
}
Utils.Log("Server Running State = " + server.isRunning(), API.class);
isConnected = true;
currentSocket = socket;
triggerConnections();
socket.setDataCallback(new DataCallback() {
@Override
public void onDataAvailable(DataEmitter emitter, ByteBufferList bb) {
byte[] bytes = bb.getAllByteArray();
String[] content = Utils.splitJson(new String(bytes));
for (int i = 0; i < content.length; i++) {
Utils.Log("SocketDataReceived = " + content[i], API.class);
handleData(content[i]);
}
bb.recycle();
}
});
socket.setClosedCallback(new CompletedCallback() {
@Override
public void onCompleted(Exception ex) {
if (ex != null) {
Utils.Log("Closed CallBack With Exception = " + ex.getCause(), API.class);
} else {
Utils.Log("Closed CallBack", API.class);
}
sessionReloaded = false;
isConnected = false;
server.stop();
triggerDisconnections();
A.runOnUiThread(new Runnable() {
@Override
public void run() {
new android.os.Handler().postDelayed(new Runnable() {
@Override
public void run() {
connectSocket(new onSocketConnectionListener() {
@Override
public void connected(AsyncSocket socket) {
}
});
Utils.Log("Closed CallBack", API.class);
}
}, 3000);
}
});
}
});
socket.setEndCallback(new CompletedCallback() {
@Override
public void onCompleted(Exception ex) {
if (ex != null) {
Utils.Log("End CallBack With Exception = " + ex.getCause(), API.class);
} else {
Utils.Log("End CallBack", API.class);
}
sessionReloaded = false;
isConnected = false;
server.stop();
}
});
socket.setWriteableCallback(new WritableCallback() {
@Override
public void onWriteable() {
Utils.Log("Write CallBack", API.class);
}
});
User user = MDatabase.getUser();
String session = MDatabase.getSession();
if (sessionNeedsReload()) {
reloadSession(user.mobile, session);
} else {
doPendingRequests();
}
}
};
synchronized (isConnecting) {
if (!isConnecting) {
isConnecting = true;
Utils.Log("Socket Connecting ...", API.class);
server.connectSocket(IP, PORT, socketCallBack);
}
}
}
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