创建一个简单的Node.js Web服务器，并从一个文件异步服务一个HTML页面

创建我的第一个node.js服务器时，我找到了一个简单而有效的方法来做到这一点。

我们可以在开始时加载一次HTML，而不是为每个请求加载HTML。然后返回我们在启动时加载的数据。

const host = "localhost";
const port = 5000;
const http = require("HTTP");
const fs = require("fs").promises;

let htmlFile;
const reqListenerFunc = function (req, resp) {
    resp.setHeader("Content-Type", "text/html");
    resp.writeHead(200);
    resp.end(htmlFile);
};
const simpleServer = http.createServer(reqListenerFunc);

// // Using Arrow function directly
// const simpleServer = http.createServer( (req, resp) => {
//     resp.setHeader("Content-Type", "text/html");
//     resp.writeHead(200);
//     resp.end(htmlFile);
// });

fs.readFile(__dirname + "/index.html")
    .then(content => {
        htmlFile = content;
        simpleServer.listen(port, host, () => {
            console.log(`Node.js web server is running on http://${host}:${port}`);
        });
    })
    .catch(err => {
        console.error(`Cannot read index.html file. <br> Error: ${err}`);
        process.exit(1);
    });

阅读更多信息:https://www.digitalocean.com/community/tutorials/how-to-create-a-web-server-in-node-js-with-the-http-module

Node.js webserver

没有第三方框架;允许查询字符串;添加尾随斜杠;处理404

创建一个public_html子文件夹，并将所有内容放在其中。

要点:https://gist.github.com/veganaize/fc3b9aa393ca688a284c54caf43a3fc3

var fs = require('fs');

require('http').createServer(function(request, response) {
  var path = 'public_html'+ request.url.slice(0,
      (request.url.indexOf('?')+1 || request.url.length+1) - 1);
      
  fs.stat(path, function(bad_path, path_stat) {
    if (bad_path) respond(404);
    else if (path_stat.isDirectory() && path.slice(-1) !== '/') {
      response.setHeader('Location', path.slice(11)+'/');
      respond(301);
    } else fs.readFile(path.slice(-1)==='/' ? path+'index.html' : path,
          function(bad_file, file_content) {
      if (bad_file) respond(404);
      else respond(200, file_content);
    });
  });
 
  function respond(status, content) {
    response.statusCode = status;
    response.end(content);
  }
}).listen(80, function(){console.log('Server running on port 80...')});

你不需要快递。你不需要联系。Node.js执行http native。你所需要做的就是根据请求返回一个文件:

var http = require('http')
var url = require('url')
var fs = require('fs')

http.createServer(function (request, response) {
    var requestUrl = url.parse(request.url)    
    response.writeHead(200)
    fs.createReadStream(requestUrl.pathname).pipe(response)  // do NOT use fs's sync methods ANYWHERE on production (e.g readFileSync) 
}).listen(9615)    

一个更完整的例子，确保请求不能访问基目录下的文件，并进行适当的错误处理:

var http = require('http')
var url = require('url')
var fs = require('fs')
var path = require('path')
var baseDirectory = __dirname   // or whatever base directory you want

var port = 9615

http.createServer(function (request, response) {
    try {
        var requestUrl = url.parse(request.url)

        // need to use path.normalize so people can't access directories underneath baseDirectory
        var fsPath = baseDirectory+path.normalize(requestUrl.pathname)

        var fileStream = fs.createReadStream(fsPath)
        fileStream.pipe(response)
        fileStream.on('open', function() {
             response.writeHead(200)
        })
        fileStream.on('error',function(e) {
             response.writeHead(404)     // assume the file doesn't exist
             response.end()
        })
   } catch(e) {
        response.writeHead(500)
        response.end()     // end the response so browsers don't hang
        console.log(e.stack)
   }
}).listen(port)

console.log("listening on port "+port)

这是一个最快的解决方案，我用快速看到网页

sudo npm install ripple-emulator -g

从那时起，只需输入html文件的目录并运行

ripple emulate

然后将设备更改为Nexus 7横屏。

我使用下面的代码来启动一个简单的web服务器，如果Url中没有提到文件，它会渲染默认的html文件。

var http = require('http'),
fs = require('fs'),
url = require('url'),
rootFolder = '/views/',
defaultFileName = '/views/5 Tips on improving Programming Logic   Geek Files.htm';


http.createServer(function(req, res){

    var fileName = url.parse(req.url).pathname;
    // If no file name in Url, use default file name
    fileName = (fileName == "/") ? defaultFileName : rootFolder + fileName;

    fs.readFile(__dirname + decodeURIComponent(fileName), 'binary',function(err, content){
        if (content != null && content != '' ){
            res.writeHead(200,{'Content-Length':content.length});
            res.write(content);
        }
        res.end();
    });

}).listen(8800);

它将呈现所有的js, css和图像文件，以及所有的html内容。

同意“没有内容类型比错误的内容类型更好”的说法

这基本上是连接版本3的公认答案的更新版本:

var connect = require('connect');
var serveStatic = require('serve-static');

var app = connect();

app.use(serveStatic(__dirname, {'index': ['index.html']}));
app.listen(3000);

我还添加了一个默认选项，以便index.html作为默认选项。