如何使用 websocket 连接两个 Node.js 服务器?
这是我的问题:
我有服务器 A,运行 node.js 并使用 socket.io 与客户端(Web 浏览器)通信。这一切都运行得很好。
然而,现在我有了服务器B,它也需要通过websocket连接到服务器A,我就碰壁了。我发现的所有node.js websocket客户端都不能与服务器A上的socket.io一起工作。
所以,这就是我正在努力的情况:
.--------. .----------. .----------.
| CLIENT | <--> | SERVER A | <--> | SERVER B |
'--------' '----------' '----------'
客户端-服务器连接是通过socket.io完成
的,服务器B(运行node.js)应该通过websocket连接到服务器A(为了通过端口80)。但是...
即使是 socket.io-client 模块中的示例代码也不起作用...:/
// Connect to server
var socket = new io.Socket('localhost', {port: 8080});
socket.connect();
// Add a connect listener
socket.on('connect', function(socket) {
console.log('Connected.');
});
代码只是通过而没有任何错误,并且执行在几秒钟后结束。
更新:代码示例
服务器(工作得很好)看起来像这样:
// Load requirements
var http = require('http'),
io = require('socket.io');
// Create server & socket
var server = http.createServer(function(req, res){
// Send HTML headers and message
res.writeHead(404, {'Content-Type': 'text/html'});
res.end('<h1>Aw, snap! 404</h1>');
});
server.listen(8080);
io = io.listen(server);
// Add a connect listener
io.sockets.on('connection', function(socket) {
console.log('Client connected.');
// Disconnect listener
socket.on('disconnect', function() {
console.log('Client disconnected.');
});
});
客户端看起来像这样
console.log('1');
// Connect to server
var io = require('socket.io-client')
var socket = new io.Socket('localhost', {port: 8080});
socket.connect();
console.log('2');
// Add a connect listener
socket.on('connect', function(socket) {
console.log('Connected!');
});
console.log('3');
1、2 和 3 打印得很好,没有错误,几秒钟后进程就退出了
此外,服务器 A 没有输出任何内容日志,即使我将 socket.io 日志设置为“所有”。
Here's my problem:
I have server A, running node.js and using socket.io for communicating with clients (web browsers). This all is running fine and dandy.
However, now that I have server B, which also needs to connect to server A through websockets, I have hit a wall. None of the node.js websocket clients I've found won't work with the socket.io on the server A.
So, this is the case I'm striving for:
.--------. .----------. .----------.
| CLIENT | <--> | SERVER A | <--> | SERVER B |
'--------' '----------' '----------'
Client-server A connection is done through socket.io
Now, Server B (running node.js) should connect to server A via websocket (in order to go through port 80). But...
Even the example code in socket.io-client module doesn't work... :/
// Connect to server
var socket = new io.Socket('localhost', {port: 8080});
socket.connect();
// Add a connect listener
socket.on('connect', function(socket) {
console.log('Connected.');
});
The code just passes without any errors and execution ends after few seconds.
Update: Code samples
Server (which works just fine) looks like this:
// Load requirements
var http = require('http'),
io = require('socket.io');
// Create server & socket
var server = http.createServer(function(req, res){
// Send HTML headers and message
res.writeHead(404, {'Content-Type': 'text/html'});
res.end('<h1>Aw, snap! 404</h1>');
});
server.listen(8080);
io = io.listen(server);
// Add a connect listener
io.sockets.on('connection', function(socket) {
console.log('Client connected.');
// Disconnect listener
socket.on('disconnect', function() {
console.log('Client disconnected.');
});
});
Client looks like this
console.log('1');
// Connect to server
var io = require('socket.io-client')
var socket = new io.Socket('localhost', {port: 8080});
socket.connect();
console.log('2');
// Add a connect listener
socket.on('connect', function(socket) {
console.log('Connected!');
});
console.log('3');
1, 2 and 3 prints out just fine, no errors, and few seconds later the process just exits
Also, server A doesn't output anything to the log, even though I have the socket.io logging set on "everything".
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对于未来的人:
这是 2 个非常简单的
Node.js
应用程序,它们使用 socket.io 进行连接、发送和接收彼此之间的消息。所需包为:
Node-App-1 server.js:
Node-App-2 client.js:< /代码>
For future people:
Here is 2 very simple
Node.js
apps that use socket.io to connect, send and receive messages between each other.Required package is:
Node-App-1 server.js:
Node-App-2 client.js:
事实证明,由于某种原因,我正在使用旧的示例,尽管我对它们进行了三次检查。嗯,哦。
此外,事实证明,socket.io-client 在最新的 Node (6.xx) 上已损坏。设法从 github 找到更新,替换文件,耶,一切正常!
编辑:不幸的是,我没有保存任何工作示例的链接,但在快速浏览代码后,似乎唯一的更改是客户端代码,现在看起来像这样:
Turns out I was using old examples, for some reason, even though I triple checked them. Well, doh.
Also, it turned out that the socket.io-client is broken on latest Node (6.x.x). Managed to find an update from github for it, replaced the files and yay, everything's working!
Edit: Unfortunately I didn't save any links to working examples but after quickly skimming through the code it seems that the only changes were to the client code, which now looks like this:
这是我编写的代码片段,它使用 socket.io 1.0.6 和 socket.io-client 1.0.6。情况如下:
服务器A(Socket.io客户端)<--->服务器 B(Socket.io 服务器)
服务器 B(服务器):
服务器 A(客户端):
如果我仅在客户端服务器上使用 localhost:8080,则不会连接。
Here is a snippet of code I wrote, it's using socket.io 1.0.6 and socket.io-client 1.0.6. The case is the following:
Server A (Socket.io Client) <---> Server B (Socket.io Server)
Server B (Server):
Server A (Client):
If I'm using localhost:8080 only on the client server it doesn't connect.