我正在尝试使用Node.js和Express.io编写简单的应用程序。在阅读了一些Express.io文档并成功连接到
http://chat.socket.io之后，我找到了一个简单的示例来创建Node.js和Express.io服务器端。在命令行中运行以下代码并在浏览器中打开http://localhost:3000后，我没有收到任何错误信息。我无法找到有关在http://chat.socket.io服务器端编码的好文档。现在我想尝试从Android客户端发送请求到服务器端并使用示例，但是我遇到了连接错误：错误：
CONNECTION ERROR
server.js:
// Setup basic express server
var express = require('express');
var app = express();
var server = require('http').createServer(app);
var io = require('../..')(server);
var port = process.env.PORT || 3000;
server.listen(port, function () {
console.log('Server listening at port %d', port);
});
// Routing
app.use(express.static(__dirname + '/public'));
// Chatroom
// usernames which are currently connected to the chat
var usernames = {};
var numUsers = 0;
io.on('connection', function (socket) {
var addedUser = false;
// when the client emits 'new message', this listens and executes
socket.on('new message', function (data) {
// we tell the client to execute 'new message'
socket.broadcast.emit('new message', {
username: socket.username,
message: data
});
});
// when the client emits 'add user', this listens and executes
socket.on('add user', function (username) {
// we store the username in the socket session for this client
socket.username = username;
// add the client's username to the global list
usernames[username] = username;
++numUsers;
addedUser = true;
socket.emit('login', {
numUsers: numUsers
});
// echo globally (all clients) that a person has connected
socket.broadcast.emit('user joined', {
username: socket.username,
numUsers: numUsers
});
});
// when the client emits 'typing', we broadcast it to others
socket.on('typing', function () {
socket.broadcast.emit('typing', {
username: socket.username
});
});
// when the client emits 'stop typing', we broadcast it to others
socket.on('stop typing', function () {
socket.broadcast.emit('stop typing', {
username: socket.username
});
});
// when the user disconnects.. perform this
socket.on('disconnect', function () {
// remove the username from global usernames list
if (addedUser) {
delete usernames[socket.username];
--numUsers;
// echo globally that this client has left
socket.broadcast.emit('user left', {
username: socket.username,
numUsers: numUsers
});
}
});
});
我的Android代码：
private Socket mSocket;
{
try {
/* connection successful to http://chat.socket.io */
mSocket = IO.socket("http://localhost:3000");
} catch (URISyntaxException e) {
Log.e("Error URI", String.valueOf(e));
throw new RuntimeException(e);
}
}
public void onCreate(Bundle savedInstanceState) {
...
mSocket.on(Socket.EVENT_CONNECT_ERROR, onConnectError);
mSocket.on(Socket.EVENT_CONNECT_TIMEOUT, onConnectError);
mSocket.on("new message", onNewMessage);
mSocket.on("user joined", onUserJoined);
mSocket.on("user left", onUserLeft);
mSocket.on("typing", onTyping);
mSocket.on("stop typing", onStopTyping);
mSocket.connect();
...
Button signInButton = (Button) findViewById(R.id.sign_in_button);
signInButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View view) {
attemptLogin();
}
});
mSocket.on("login", onLogin);
}
private void attemptLogin() {
mUsernameView.setError(null);
String username = mUsernameView.getText().toString().trim();
if (TextUtils.isEmpty(username)) {
mUsernameView.setError(getString(R.string.error_field_required));
mUsernameView.requestFocus();
return;
}
mUsername = username;
mSocket.emit("add user", username);
}
Android错误:
E/AndroidRuntime﹕ FATAL EXCEPTION: EventThread
java.lang.IllegalArgumentException: delay < 0: -432345566375051264
at java.util.Timer.schedule(Timer.java:457)
at com.github.nkzawa.socketio.client.Manager.reconnect(Manager.java:497)
at com.github.nkzawa.socketio.client.Manager.access$2000(Manager.java:20)
at com.github.nkzawa.socketio.client.Manager$8$1$1.call(Manager.java:519)
at com.github.nkzawa.socketio.client.Manager$1$3.call(Manager.java:282)
at com.github.nkzawa.emitter.Emitter.emit(Emitter.java:117)
at com.github.nkzawa.engineio.client.Socket.onError(Socket.java:754)
at com.github.nkzawa.engineio.client.Socket.access$800(Socket.java:29)
at com.github.nkzawa.engineio.client.Socket$4.call(Socket.java:293)
at com.github.nkzawa.emitter.Emitter.emit(Emitter.java:117)
at com.github.nkzawa.engineio.client.Transport.onError(Transport.java:63)
at com.github.nkzawa.engineio.client.transports.PollingXHR.access$100(PollingXHR.java:19)
at com.github.nkzawa.engineio.client.transports.PollingXHR$6$1.run(PollingXHR.java:126)
at com.github.nkzawa.thread.EventThread$2.run(EventThread.java:75)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573)
at java.lang.Thread.run(Thread.java:838)