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server.js
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73 lines (68 loc) · 2.7 KB
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const fs = require('fs');
const url = require('url');
const path = require('path');
const mime = require('./mime');//文件格式
const headers = {
'access-control-allow-headers':'*',
'Content-Type': 'text/plain; charset=utf-8',//解决中文乱码 设置头为utf-8格式读取
}
const processRequest = (request, response) => {
//let pathName = url.parse(request.url).pathname
let baseUrl = 'http://'+request.headers.host;
let pathName = new URL(baseUrl + request.url).pathname;//获取文件名
// 解码 防止中文名产生乱码
pathName = decodeURI(pathName);
console.log('access: '+ pathName);
// 获取资源文件的绝对路径 path.resolve([…paths])里的每个参数都类似在当前目录执行一个cd操作，从左到右执行，返回的是最后的当前目录，
let filePath = path.resolve(__dirname,'.'+pathName);
// 文件后缀名
let ext = path.extname(pathName);//返回的是最后一个点及其后面的内容
ext = ext ? ext.slice(1) : 'unknown';//若不空 则去除点
// 未知类型一律用 "text/plain" 类型
headers['Content-Type'] = mime[ext] ||'text/plain';
headers['Content-Type'] += '; charset=utf-8';
//获得文件的状态 文件和文件夹分别操作
fs.stat(filePath, (err, stats) => {
// 未找到文件
if (err) {
headers['Content-Type'] = 'text/html; charset=utf-8';
response.writeHead(404, headers);
response.end("<h1>404 Not Found</h1>");
return;
}
//若为文件 则读取 并显示
if (stats.isFile()) {
fs.readFile(filePath,(err, data) => {// 异步读取
if (err) {
response.writeHead(500, headers);
response.end('<h1>500 Server Error</h1>');
return;
}
response.writeHead(200, headers);
response.end(data);//读取后的data为buff 显示出来时 可以设置读取格式(在header上设置)
});
}
//若为目录 则以html格式读取
if (stats.isDirectory()) {
let html = '<head><meta charset="utf-8" /></head>';
fs.readdir(filePath, (err, files) => {
if (err) {
html += `<div>读取路径失败！</div>`;
response.writeHead(404, headers);
response.end(html);
return;
}
headers['Content-Type'] = 'text/html; charset=utf-8';
response.writeHead(200, headers);
for (var file of files) {//读取文件夹内的内容
if(pathName=='/'){//若当前为根目录
html += `<h2> <a href="${pathName}${file}">${file}</a> </h2>`;
}
else html += `<h2> <a href="${pathName}/${file}">${file}</a> </h2>`;
}
response.end(html);
})
}
})
}
module.exports = processRequest;