Question

我刚刚使用socket.io创建了node js app
对于我在本地它工作正常，但当我上传到bluemix时，它给了我错误

以下是在localhost上正常工作的文件

app.js文件

var app = require('express')();
var http = require('http').Server(app);
var io = require('socket.io')(http);

app.engine('html', require('swig').renderFile);
app.set('view engine', 'html');
app.set('views', __dirname + '/views');


app.get('/', function(req, res){
    res.render('index.html');
}); 

io.on('connection', function(socket){
console.log('a user connected');
socket.on('disconnect', function() {
    console.log( 'A user disconnected' );
});
socket.on('chat message', function(msg) {
    console.log('Chat message ' + msg);
    var response = {
        'msg': msg,
        'address': socket.request.connection.remoteAddress
    };
    io.emit('chat message', JSON.stringify( response ));
}); 
});

http.listen(1234, '0.0.0.0', function(){
console.log('listening on *:1234');
});

和index.html文件

<!doctype html>
<html>
<head>
<title>Socket.IO chat</title>
<style>
    * { margin: 0; padding: 0; box-sizing: border-box; }
    body { font: 13px Helvetica, Arial; }
    form { background: #000; padding: 3px; position: fixed; bottom: 0; width: 100%; }
    form input { border: 0; padding: 10px; width: 90%; margin-right: .5%; }
    form button { width: 9%; background: rgb(130, 224, 255); border: none; padding: 10px; }
    #messages { list-style-type: none; margin: 0; padding: 0; }
    #messages li { padding: 5px 10px; }
    #messages li:nth-child(odd) { background: #eee; }
</style>
</head>
<body>
<ul id="messages"></ul>
<form action="">
<input id="m" autocomplete="off" /><button>Send</button>
</form>
<script src="/socket.io/socket.io.js"></script>
<script src="https://cdn.socket.io/socket.io-1.2.0.js"></script>
<script src="http://code.jquery.com/jquery-1.11.1.js"></script>
<script>
var socket = io();
$('form').submit( function() {
    socket.emit('chat message', $('#m').val());
    $('#m').val('');
    return false;
});
socket.on('chat message', function( info ) {
    var response = JSON.parse( info );
    $('#messages').append($('<li>').text( response.address + ': ' +      response.msg ) );
});
</script>
</body>
</html>

这是服务器上的文件

app.js file

/*eslint-env node*/

//------------------------------------------------------------------
// node.js starter application for Bluemix
//------------------------------------------------------------------

// This application uses express as its web server
// for more info, see: http://expressjs.com
var express = require('express');

// cfenv provides access to your Cloud Foundry environment
// for more info, see: https://www.npmjs.com/package/cfenv
var cfenv = require('cfenv');

// create a new express server
var app = express();

// serve the files out of ./public as our main files
app.use(express.static(__dirname + '/public'));

// get the app environment from Cloud Foundry
var appEnv = cfenv.getAppEnv();

// start server on the specified port and binding host
app.listen(appEnv.port, function() {

// print a message when the server starts listening
console.log("server starting on " + appEnv.url);
});

var http = require('http').Server(app);
var io = require('socket.io')(http);

app.engine('html', require('swig').renderFile);
app.set('view engine', 'html');
app.set('views', __dirname + '/views');


app.get('/', function(req, res){
    res.render('index.html'); 
});

io.on('connection', function(socket){
    console.log('a user connected');
        socket.on('disconnect', function() {
                    console.log( 'A user disconnected' );
                        });
            socket.on('chat message', function(msg) {
                        console.log('Chat message ' + msg);
                                var response = {
                                                'msg': msg,
                            'address':   socket.request.connection.remoteAddress
                        };
                                        io.emit('chat message',   JSON.stringify( response ));
                                            });
});

index.html文件相同

我在谷歌Chrome控制台上出现了这个错误

GET http://testingchat.mybluemix.net/socket.io/?EIO=3&transport=polling&t=1440575370819-112 404 (Not Found)

我使用了此tutorial

中的代码

谁能帮帮我？谢谢

Answer 1

根据你的代码设置socket.io监听1234端口。在Bluemix运行时，仅启用端口80,443和9080进行路由。此外，运行时引擎将以动态方式分配您的本地端口，您必须在使用它设置socket.io之前从vcap服务中读取它。查看Bluemix文档以了解如何操作。

关于404错误，这是由于对/socket.io/ path

的请求

Answer 2

您是否在依赖项中将package.io模块添加到package.json？

"dependencies": {
    "express": "^4.6.1",
    "socket.io": "^1.3.4"
}

此外，尝试从终端运行 cf logs 命令，以确切了解运行应用时发生的情况。

将使用socket.io的node.js应用程序上传到Bluemix会导致404错误

2 个答案: