Node.js - Web 服务器程序练习

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

var root = path.resolve(process.argv[2] || './static')

console.log('Static root dir: ' + root)

var server = http.createServer((request, response) => {
    var pathname = url.parse(request.url).pathname
    var filepath = path.join(root, pathname)
    fs.stat(filepath, (err, stats) => {
        if (!err && stats.isDirectory()) {
            fs.readdir(filepath, (err, files) => {
                if (err) {
                    fail(request, response)
                    console.log('Wrong dir operation!')
                } else if (files.includes('index.html')) {
                    filepath = path.join(filepath, 'index.html')
                    success(filepath, request, response)
                } else if (files.includes('default.html')) {
                    filepath = path.join(filepath, 'default.html')
                    success(filepath, request, response)
                }
            })
        } else if (!err && stats.isFile()) {
            success(filepath, request, response)
        } else {
            fail(request, response)
        }
    })
})

function success(filepath, request, response) {
    console.log('200' + request.url)
    response.writeHead(200)
    fs.createReadStream(filepath).pipe(response)
}

function fail(request, response) {
    console.log('404 ' + request.url)
    response.writeHead(404)
    response.end('404 Not Found')
}

server.listen(8080)

console.log('Server is running at localhost:8080...')

简单的 GET

var http = require('http')

http.get('http://localhost:8080/', (res) => {
    const { statusCode } = res;
    const contentType = res.headers['content-type'];
  
    let error;
    if (statusCode !== 200) {
      error = new Error('Request Failed.\n' +
                        `Status Code: ${statusCode}`);
    }
    if (error) {
      console.error(error.message);
      // consume response data to free up memory
      res.resume();
      return;
    }
  
    res.setEncoding('utf8');
    let rawData = '';
    res.on('data', (chunk) => { rawData += chunk; });
    res.on('end', () => {
      try {
        console.log(rawData);
      } catch (e) {
        console.error(e.message);
      }
    });
  }).on('error', (e) => {
    console.error(`Got error: ${e.message}`);
  });

或者用 request 书写 GET 方法

var http = require('http')

var options = {
    port: 8080,
    path: '/',
    method: 'GET'
};

var req = http.request(options, function(res) {
    console.log('STATUS: ' + res.statusCode);
    console.log('HEADERS: ' + JSON.stringify(res.headers));
    res.setEncoding('utf8');
    res.on('data', function (chunk) {
        console.log('BODY: ' + chunk);
    });
});

req.on('error', function(e) {
    console.log('problem with request: ' + e.message);
});

req.end();

点我查看完整代码