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Node.js 发布时间：2022-04-24 发布网站：大佬教程 code.js-code.com

大佬教程收集整理的这篇文章主要介绍了node.js express 3 socket.io =发送后无法设置标头，大佬教程大佬觉得挺不错的，现在分享给大家，也给大家做个参考。

我是学习node.js的新手,似乎遇到了一个无法修复的错误.

它是一个非常简单的初学者代码所以不需要太多解释,更多的是它在localhost上工作正常,但在生产服务器上中断.

App.js

var express = require('express'),routes = require('./routes'),http = require('http'),path = require('path');

var app = express();

app.configure(function(){
  app.set('port',process.env.PORT || 8000);
  app.set('views',__dirname + '/views');
  app.set('view ENGIne','jade');
  app.use(express.favicon());
  app.use(express.logger('dev'));
  app.use(express.bodyParser());
  app.use(express.methodOverride());
  app.use(app.router);
  app.use(express.static(path.join(__dirname,'public')));
});

app.configure('development',function(){
  app.use(express.errorHandler());
});

app.get('/',routes.indeX);

var server = app.listen(8000);
var io = require('socket.io').listen(server);

server.listen(app.get('port'),function(){
  console.log("Express server listening on port " + app.get('port'));
});@H_616_12@ 
 这是可怕的错误！ 
  
 
http.js:644
    throw new Error('Can\'t set headers after they are sent.');
          ^
Error: Can't set headers after they are sent.
    at ServerResponse.outgoingmessage.setHeader (http.js:644:11)
    at ServerResponse.res.setHeader (/home1/artalatc/public_html/cloud1/node_modules/express/node_modules/connect/lib/patch.js:59:22)
    at next (/home1/artalatc/public_html/cloud1/node_modules/express/node_modules/connect/lib/proto.js:153:13)
    at Function.app.handle (/home1/artalatc/public_html/cloud1/node_modules/express/node_modules/connect/lib/proto.js:198:3)
    at Server.app (/home1/artalatc/public_html/cloud1/node_modules/express/node_modules/connect/lib/connect.js:66:31)
    at Manager.handlerequest (/home1/artalatc/public_html/cloud1/node_modules/socket.io/lib/manager.js:564:28)
    at Server.<anonymous> (/home1/artalatc/public_html/cloud1/node_modules/socket.io/lib/manager.js:118:10)
    at Server.EventEmitter.emit (events.js:115:20)
    at httpParser.parser.onIncoming (http.js:1793:12)
    at httpParser.parserOnHeadersComplete [as onHeadersComplete] (http.js:111:23)@H_616_12@ 
 问题似乎是在var io = require(‘socket.io’).listen(server);因为评论这样可以消除错误.