仿照 vscode LiveServe
# 前言
摘要
使用过 vite 的 佬们，都知道，打包完毕之后 vite 会有一个预览功能，vite preview 就可以预览打包后文件
vscode 插件市场中也有一个类似插件，其实功能都是大差不差的
鄙人最近学了会 nodejs 或者说复习下，以前看过 ,但是api 调用大师记不住 api，但是记不住 api,没办法用的少
想使用 node 原生实现一个类似功能 （当然是简陋版本）😂，其实是蛋疼，主要还是想回顾下 node，看了文档
感觉又会了，但是写不出啥东西 😂
实现原理
具体原理应该是不难，就是 使用socket ，访问对应路径，或者说请求对应的路径时候，读取服务器资源，返回
其实就是 Content-type.不过这个过程如果自己实现，还是比较麻烦，好在，人性化 node 中 http 模块非常好
用，省略了很多步骤 🤣。
其他没啥好说的了，看下面 文件 应该能看懂，鄙人试过了 还有些 bug ，比如有些文件读取到了，但是没有追加
到屏幕上去。
# 代码
# 不使用缓存
const http = require('node:http')
const fs = require('node:fs')
const path = require('node:path')
const nodeURL = require('node:url')
const {
exec
} = require('child_process');
const NotFound = `<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>404</title>
<style>
* {
margin: 0;
padding: 0;
}
html,body {
height: 100vh;
background:url("https://wuxin0011.github.io/fantasy/screen.png");
background-size: cover;
background-attachment: fixed;
background-repeat: no-repeat;
display: flex;
justify-content: center;
align-items: center;
}
h2 {
font-size:40px;
}
</style>
</head>
<body>
<h2>未知错误</h2>
</body>
</html>
`
const Template = `<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>template</title>
<style>
* {
margin: 0;
padding: 0;
}
body {
height: 100vh;
background-color: #eee;
}
.unknown-file::before {
content: '❓';
}
.folder::before,.file::before{
content: '👝';
}
.html-file::before {
content: '📘';
}
.log-file::before,.json-file::before {
content: '📄';
}
.apk-file::before {
content: '📦';
}
.css-file::before {
content: '🌼';
}
.js-file::before {
content: '🍟';
}
.ini-file::before,.config-file::before,.xml-file::before {
content: '🍎';
}
.js-file::before {
content: '🍧';
}
.java-file::before{
content: '🍉';
}
.vue-file::before{
content: '📀';
}
.ts-file::before{
content: '📗';
}
.jsx-file::before{
content: '🎇';
}
.tsx-file::before{
content: '🧿';
}
.iml-file::before{
content: '🎗';
}
.class-file::before{
content: '💎';
}
.md-file::before{
content: '📒';
}
.txt-file::before{
content: '📄';
}
.jar-file::before,
.docker-file::before,
.exe-file::before,
.run-file::before{
content: '🚀';
}
.python-file::before{
content: '🦎';
}
.c-file::before{
content: '🛢';
}
.r-file::before{
content: '🍥';
}
.rust-file::before{
content: '🍔';
}
.ruby-file::before{
content: '🍿';
}
.go-file::before{
content: '🥝';
}
.php-file::before{
content: '🥪';
}
.kotlin-file::before{
content: '🍧';
}
.matlab-file::before{
content: '🥙';
}
.perl-file::before{
content: '🍿';
}
.lua-file::before{
content: '🧀';
}
.swift-file::before{
content: '🍭';
}
.pdf-file::before {
content: '📕';
}
.database-file::before {
content: '👔';
}
.compress-file::before {
content: '🥅';
}
.link-file::before,
.lnk-file::before,
.ink-file::before,
.gif-file::before{
content: '🔗';
}
.img-file::before {
content: '🔎';
}
.doc-file::before ,
.docx-file::before{
content: '📝';
}
.ppt-file::before ,
.pptx-file::before{
content: '🧨';
}
.xlsx-file::before ,
.xls-file::before{
content: '📊';
}
.ttf-file::before ,
.woff-file::before,
.woff2-file::before{
content: '🌰';
}
.ogg-file::before ,
.mp3-file::before{
content: '🥭';
}
a {
text-decoration: none;
cursor: pointer;
color: #000;
transition: all ease-in-out 0.3s;
}
a:hover {
color: teal;
}
.container {
display: flex;
width: 75%;
margin: 0 auto;
margin-top: 100px;
flex-wrap: wrap;
}
.container a {
display: inline-block;
margin: 10px;
width: 200px;
overflow:hidden;
padding: 10px;
}
</style>
</head>
<body>
<div class="container"></div>
</body>
</html>
`
const isWindow = () => process.platform === 'win32'
const isMac = () => process.platform === 'darwin'
// 获取文件后缀
const getExt = (urlString) => path.extname(nodeURL.parse(urlString).pathname)
// 文件类型判断
const isHTML = (file) => /\.html$/.test(file)
const isTxt = (file) => /\.(txt|log)/.test(file)
const isCss = (file) => /\.(css)$/.test(file)
const isJs = (file) => /\.(js)$/.test(file)
const isJsx = (file) => /\.(jsx)$/.test(file)
const isTs = (file) => /\.ts$/.test(file)
const isTsx = (file) => /\.(tsx)$/.test(file)
const isVue = (file) => /\.(vue)$/.test(file)
const isPython = (file) => /\.(py)$/.test(file)
const isRuby = (file) => /\.(rb)$/.test(file)
const isGo = (file) => /\.(go)$/.test(file)
const isRust = (file) => /\.(rs)$/.test(file)
const isSwift = (file) => /\.(swift)$/.test(file)
const isKotlin = (file) => /\.(kt)$/.test(file)
const isPhp = (file) => /\.(php)$/.test(file)
const isPerl = (file) => /\.(pl)$/.test(file)
const isMatlab = (file) => /\.(m)$/.test(file)
const isLua = (file) => /\.(lua)$/.test(file)
const isC = (file) => /\.(c|cpp|h|cc|cxx)$/.test(file)
const isR = (file) => /\.(r)$/.test(file)
const isClassFile = (file) => /\.(class)$/.test(file)
const isJavaFile = (file) => /\.(java)$/.test(file)
const isSQL = (file) => /\.(sql|bson|json|dump|bak|ldf|mdf|dmp|dat|idx)$/i.test(file)
const isApk = (file) => /\.(apk)$/i.test(file)
const isImage = (file) => /\.(png|jpg|jpeg|apng|avif|bmp|gif|ico|cur|svg|tiff|webp)$/.test(file)
const isLink = (file) => /\.(link|lnk|ink)$/.test(file)
const isCompress = (file) => /\.(zip|gz|tar|7z|rar|gzip|bzip|bzip2)$/i.test(file)
const isMd = (file) => /\.(md)$/.test(file)
const isRunFile = (file) => /\.(exe|sh|com|bat|msi|dll|bin|out|pl|jar)$/i.test(file)
const isConfigFile = (file) => /\.(ini|conf|cfg|rc|properties|plist|htaccess|cnf|yml|yaml|ddl)$/i.test(file)
// 针对不同请求返回不同格式
const getType = (url, is_html = false) => is_html ? 'text/html;charset=utf-8' : MEDIA_TYPE[getExt(url)] || `text/plain;charset=utf-8`
const getTagStr = (url, isFolder = false) => {
const fileName = path.basename(url)
if (isFolder) {
return `<a class="folder" href="${url}">${fileName}</a>`
} else {
return `<a class="file ${getClassName(url)}" href="${url}" >${fileName}</a>`
}
}
// 将 \ 或者 \\ 或者 // 转换成 /
const getRequestUrl = (folderPath) => ("/" + folderPath.split(__dirname)[1].replace(/\\\\/ig, "/")).replace(/\\/ig, "/").replace(/\/\/\//g, "/").replace(/\/\//g, "/")
// 文件同步读取
const readFile = (p, mode = 'utf-8') => {
try {
return fs.readFileSync(p)
} catch (e) {
errorLog(e)
return ''
}
}
const errorLog = (msg, log = "error.log",) => {
msg = `\n=================${new Date()}==============\n ${msg} \n==============================================================================`
fs.appendFile(path.join(__dirname, log), msg, (err) => {
if (err) {
console.warn('日志写入失败！', err)
}
})
}
// 暂时不处理ico格式文件
// 在此处可以错拦截请求管理
const isAllowResolve = (url) => {
return !(url.indexOf('favicon.ico') !== -1) && !(url.startsWith('http://') || url.startsWith('https://'))
}
const MEDIA_TYPE = {
'.jpg': 'image/jpeg',
'.jpeg': 'image/jpeg',
'.png': 'image/png',
'.gif': 'image/gif',
'.bmp': 'image/bmp',
'.webp': 'image/webp',
'.svg': 'image/svg+xml',
'.csv': 'text/csv;charset=utf-8',
'.html': 'text/html;charset=utf-8',
'.txt': 'text/plain;charset=utf-8',
'.log': 'text/plain;charset=utf-8',
'.css': 'text/css;charset=utf-8',
'.js': 'text/javascript;charset=utf-8',
'.md': 'text/plain;charset=utf-8', // 暂时将md文件设置为浏览器可读
'.xml': 'application/xml',
'.pdf': 'application/pdf',
'.xlsx': 'application/vnd.ms-excel',
'.xls': 'application/vnd.ms-excel',
'.doc': 'application/msword',
'.docx': 'application/msword',
'.ppt': 'application/vnd.ms-powerpoint',
'.pptx': 'application/vnd.ms-powerpoint',
'.ttf': 'application/font-woff',
'.woff': 'application/font-woff',
'.woff2': 'application/font-woff',
'.zip': 'application/zip',
'.7z': 'application/zip',
'.tar': 'application/zip',
'.rar': 'application/zip',
'.gzip': 'application/zip',
'.bzip': 'application/zip',
'.bzip2': 'application/zip',
'.mp4': 'video/mp4',
'.json': 'application/json',
'.webm': 'video/webm',
'.ogg': 'video/ogg',
'.mp3': 'audio/mpeg',
'.wav': 'audio/wav',
};
const getClassName = (url) => {
if (isMd(url)) {
return 'md-file'
}
if (isHTML(url)) {
return 'html-file'
}
if (isMatlab(url)) {
return 'matlab-file'
}
if (isPython(url)) {
return 'python-file'
}
if (isR(url)) {
return 'r-file'
}
if (isSwift(url)) {
return 'swift-file'
}
if (isGo(url)) {
return 'go-file'
}
if (isJs(url)) {
return 'js-file'
}
if (isPerl(url)) {
return 'pl-file'
}
if (isRust(url)) {
return 'rust-file'
}
if (isRuby(url)) {
return 'ruby-file'
}
if (isKotlin(url)) {
return 'kotlin-file'
}
if (isPhp(url)) {
return 'php-file'
}
if (isLua(url)) {
return 'lua-file'
}
if (isC(url)) {
return 'c-file'
}
if (isJsx(url)) {
return 'jsx-file'
}
if (isTs(url)) {
return 'ts-file'
}
if (isTsx(url)) {
return 'tsx-file'
}
if (isVue(url)) {
return 'vue-file'
}
if (isCss(url)) {
return 'css-file'
}
if (isTxt(url)) {
return 'txt-file'
}
if (isJavaFile(url)) {
return 'java-file'
}
if (isClassFile(url)) {
return 'class-file'
}
if (isConfigFile(url)) {
return 'config-file'
}
if (isImage(url)) {
return 'img-file'
}
if (isLink(url)) {
return 'link-file'
}
if (isRunFile(url)) {
return 'run-file'
}
if (isApk(url)) {
return 'apk-file'
}
if (isSQL(url)) {
return 'database-file'
}
if (isCompress(url)) {
return 'compress-file'
}
return MEDIA_TYPE[getExt(url)] ? `${getExt(url).replace(/\./, '')}-file` : 'unknown-file'
}
// 页面
class Page {
constructor(url, content, is_html = false) {
this.pageUrl = url
this.content = content
this.contentType = getType(url, is_html)
}
}
const NOT_FOUND_PAGE = new Page("404.html", NotFound, true)
const COMMAND_KEY = "COMMAND_KEY"
const hostname = '127.0.0.1'
let count = 0
/* command args */
let port = 8080
let isParseIndexHtml = false // 是否直接映射当前目录中index.html 对于单文件app应该是启用这个参数
let indexPage = 'index.html'
let isSingle = false // 是否是单文件
let refreshTime = 3000
/**
* 启动入口
*/
const server = http.createServer((request, response) => {
let req_url = decodeURIComponent(request.url)
// 是否是允许的请求
if (isAllowResolve(req_url)) {
responseContent(request, response)
}
})
const createIndexPage = (url) => `${isSingle ? __dirname : url}\\${indexPage}`
const hasExt = (url) => {
return !!url && ((url.indexOf('.') !== -1) || url === '/')
}
/**
* 请求的文件
* @param {*} request 请求
* @param {*} response 响应
*/
const responseContent = (request, response) => {
let url = request.url
if (url.indexOf('?') !== -1) {
const arr = url.split('?')
url = arr[0]
}
let real_url = path.join(__dirname, decodeURIComponent(url));
let requestUrl = decodeURIComponent(url)
if (!fs.existsSync(real_url)) {
return;
}
try {
const status = fs.statSync(real_url)
// 对于没有后缀并且不是文件夹的内容直接不处理！
if (!hasExt(url)) {
if (status.isDirectory() && isParseIndexHtml) {
const indexHtml = createIndexPage(real_url)
console.log('curReadFolder = >', indexHtml)
if (fs.existsSync(indexHtml)) {
let content = readFile(indexHtml)
// 响应页面内容
const this_page = new Page(requestUrl, content, false)
responseTemplate(request, response, this_page)
}
}
return;
}
if (status.isDirectory()) {
// 读取文件夹内容
const content = curReadFolder(real_url)
// 响应一个生成的页面
responseTemplate(request, response, new Page(requestUrl, content, true))
} else {
const content = readFile(real_url)
// 响应页面内容
const this_page = new Page(requestUrl, content, false)
responseTemplate(request, response, this_page)
}
} catch (error) {
responseErrorPage(request, response, error)
}
}
/**
* 响应一个异常请求的页面
* @param {*} request request
* @param {*} response response
* @param {*} message 错误详情
* @param {*} template 指定错误模板
* @param {*} url 错误连接，默认是 请求地址
*/
const responseErrorPage = (request, response, message, template, url) => {
let errorContent = null
url = url ?? request.url
template = template ?? NotFound
if (message) {
errorContent = template.replace(/<h2>(.*?)<\/h2>/, `<h2 style="color:red;">${message.toString()}<\/h2>`)
}
responseTemplate(request, response, new Page(url, message && errorContent ? errorContent : 'error', true))
}
/**
* 响应内容
* @param {*} request 请求
* @param {*} response 响应
* @param {*} page page类的对象
*/
const responseTemplate = (request, response, page) => {
try {
response.setHeader('Content-Type', page.contentType);
// !!! todo 如果直接使用内容长短不知道为什么报错 容易确实文件
// response.setHeader('Content-length', page.content.length);
response.write(page.content);
response.end();
} catch (error) {
// ignore ...
}
}
/**
* 响应文件下第一层文件，包括文件和目录
* @param {*} folderPath 路径
*/
const curReadFolder = (folderPath = __dirname) => {
let content = ''
let reqUrl = folderPath === __dirname ? '/' : decodeURIComponent(getRequestUrl(folderPath))
const indexHtml = createIndexPage(folderPath)
console.log('curReadFolder = >', indexHtml)
if (isParseIndexHtml && fs.existsSync(indexHtml)) {
content = readFile(indexHtml)
} else {
let temp = ''
// curr file
const files = fs.readdirSync(folderPath)
files.forEach((fileName) => {
const filePath = path.join(folderPath, fileName);
try {
// file url => file content
let this_url = getRequestUrl(filePath)
let isDirectory = fs.statSync(filePath).isDirectory()
temp += getTagStr(this_url, isDirectory)
} catch (error) {
errorLog(error)
console.warn('stats error:', error)
}
});
// create title 🧵
let title = path.basename(reqUrl) === '/' || path.basename(reqUrl) === '' ? '首页' : path.basename(reqUrl)
content = Template.replace(/<title>(.*?)<\/title>/, `<title>${title}</title>`).replace(/<div class="container">(.*?)<\/div>/, `<div class="container">${temp}</div>`)
}
return content
}
const openWebPage = (url = `http://${hostname}:${port}`) => {
let command = ''
let isInitSystemCommand = false
if (!isInitSystemCommand) {
if (isWindow()) {
command = 'start'
isInitSystemCommand = true
} else if (isMac()) {
command = 'open'
isInitSystemCommand = true
} else {
// Linux ? or unknown platform
isInitSystemCommand = false
}
}
if (isInitSystemCommand) {
exec(`${command} ${url}`, (error, stdout, stderr) => {
if (error) {
console.error(`浏览器打开失败！错误详情: ${error}`);
errorLog(error)
return;
}
if (stderr) {
console.error(`浏览器打开失败！错误详情: ${stderr}`);
errorLog(error)
return;
}
console.log(`live-server 启动成功！点击访问 ${url}`)
})
} else {
console.log(`当前环境不支持打开默认浏览器 请手动打开！${url}`)
}
}
class Command {
constructor(index, indexPage, port, refresh) {
this.index = !!index
this.indexPage = indexPage
this.port = isNaN(Number(port)) ? 8080 : Number(port)
this.refresh = isNaN(Number(refresh)) ? 3000 : Number(refresh)
// todo more command
}
}
let commandObj = null
const runCommand = () => {
if (includeCommand('--blog') || includeCommand('-b')) {
openWebPage('https://wuxin0011.github.io/tools/node-live-serve/')
} else if (includeCommand(help) || includeCommand('-h')) {
helpCommand()
} else {
console.log(`\nuse node ${path.basename(__filename)} ${help} look more \n`)
parseSingleParams()
parseParseIndexHtmlParams()
parseRefreshTimeParams()
parsePortParams()
run()
}
}
const run = () => {
/* init command ! */
commandObj = new Command(isParseIndexHtml, indexPage, port, refreshTime)
// run
const start = (error) => {
if (count < 20) {
try {
server.listen({
host: hostname,
port: port
}, () => {
curReadFolder()
openWebPage()
})
server.on('error', (error) => {
console.error(`run fail ${error} `)
port += 1
count += 1
start(error)
})
} catch (error) {
console.error(`run fail ${error} `)
port += 1
count += 1
start(error)
}
} else {
console.error('启动失败:', error)
server.close()
errorLog(error)
}
}
start()
}
const includeCommand = (arg) => {
if (!arg) {
return false
}
return process.argv.findIndex(param => param.indexOf(arg) !== -1) !== -1
}
const parseCommandArgs = (arg, defaultValue) => {
if (defaultValue === undefined) {
console.log('defaultValue is undefined')
return undefined;
}
if (!arg) {
console.log('args is null or undefined')
return defaultValue
}
for (let i = 0; i < process.argv.length; i++) {
const params = process.argv[i]
if (params.indexOf(arg) !== -1) {
if (params.indexOf('=') !== -1) {
let s = params.split('=')
return s[s.length - 1]
} else {
return defaultValue
}
}
}
return defaultValue
}
const help = '--help'
const parseIndexHtml = '--index'
const portCommand = '--port'
const refreshCommand = '--refresh'
const helpCommand = () => {
console.log(`
node ${path.basename(__filename)} [command] \n
command list: \n
command description
===============================================================================================
--help,-h command Description
--blog,-b open blog url address https://wuxin0011.github.io/tools/node-live-serve/
--port,-p specify the startup port number default ${port}
--index,-i is it directly mapped to ${indexPage}? if it exists,you can directly index page ,default ${isParseIndexHtml} ,use --index=index.html or -i=index.html
--single,-s if your app is single app please use --single ,default ${isSingle} ,use -s or --single
--refresh,-r content refresh time default ${refreshTime}
`)
}
const parseParseIndexHtmlParams = () => {
if (includeCommand(parseIndexHtml)) {
isParseIndexHtml = true
indexPage = parseCommandArgs(parseIndexHtml, indexPage)
} else if (includeCommand('-i')) {
isParseIndexHtml = true
indexPage = parseCommandArgs('-i', indexPage)
}
}
const parseSingleParams = () => {
if (includeCommand('--single') || includeCommand('-s')) {
isSingle = true
isParseIndexHtml = true
}
}
const parseRefreshTimeParams = () => {
if (includeCommand(refreshCommand) || includeCommand('-r')) {
try {
refreshTime = Number(parseCommandArgs(includeCommand('-r') ? '-r' : refreshCommand, 3000))
if (isNaN(refreshTime)) {
console.warn('refreshTime must be a number use default 3000!')
refreshTime = 3000
}
if (refreshTime < 16) {
console.warn(`refreshTime ${refreshTime} not allow refreshTime min>=16,with use default 3000 `)
refreshTime = 3000
}
} catch (error) {
console.log(`${refreshCommand} command is parse fail ,${error}`)
refreshTime = 3000
}
}
}
const parsePortParams = () => {
if (includeCommand(portCommand) || includeCommand('-p')) {
try {
port = parseInt(parseCommandArgs(includeCommand('-p') ? '-p' : portCommand, port))
if (port <= 1) {
console.warn(`port ${port} not allow ,with use default `)
port = 8080
}
} catch (error) {
port = 8080
console.log(`${portCommand} command is parse fail port default 8080! `)
}
}
}
const bootStrap = () => {
runCommand()
}
/* run */
bootStrap()
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# 使用缓存并监听内容改变
const http = require('node:http')
const fs = require('node:fs')
const path = require('node:path')
const nodeURL = require('node:url')
const {
Worker,
isMainThread,
parentPort
} = require('worker_threads');
const {
exec
} = require('child_process');
const NotFound = `<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>404</title>
<style>
* {
margin: 0;
padding: 0;
}
html,body {
height: 100vh;
background:url("https://wuxin0011.github.io/fantasy/screen.png");
background-size: cover;
background-attachment: fixed;
background-repeat: no-repeat;
display: flex;
justify-content: center;
align-items: center;
}
h2 {
font-size:40px;
}
</style>
</head>
<body>
<h2>未知错误</h2>
</body>
</html>
`
const Template = `<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>template</title>
<style>
* {
margin: 0;
padding: 0;
}
body {
height: 100vh;
background-color: #eee;
}
.unknown-file::before {
content: '❓';
}
.folder::before,.file::before{
content: '👝';
}
.html-file::before {
content: '📘';
}
.log-file::before,.json-file::before {
content: '📄';
}
.apk-file::before {
content: '📦';
}
.css-file::before {
content: '🌼';
}
.js-file::before {
content: '🍟';
}
.ini-file::before,.config-file::before,.xml-file::before {
content: '🍎';
}
.js-file::before {
content: '🍧';
}
.java-file::before{
content: '🍉';
}
.vue-file::before{
content: '📀';
}
.ts-file::before{
content: '📗';
}
.jsx-file::before{
content: '🎇';
}
.tsx-file::before{
content: '🧿';
}
.iml-file::before{
content: '🎗';
}
.class-file::before{
content: '💎';
}
.md-file::before{
content: '📒';
}
.txt-file::before{
content: '📄';
}
.jar-file::before,
.docker-file::before,
.exe-file::before,
.run-file::before{
content: '🚀';
}
.python-file::before{
content: '🦎';
}
.c-file::before{
content: '🛢';
}
.r-file::before{
content: '🍥';
}
.rust-file::before{
content: '🍔';
}
.ruby-file::before{
content: '🍿';
}
.go-file::before{
content: '🥝';
}
.php-file::before{
content: '🥪';
}
.kotlin-file::before{
content: '🍧';
}
.matlab-file::before{
content: '🥙';
}
.perl-file::before{
content: '🍿';
}
.lua-file::before{
content: '🧀';
}
.swift-file::before{
content: '🍭';
}
.pdf-file::before {
content: '📕';
}
.database-file::before {
content: '👔';
}
.compress-file::before {
content: '🥅';
}
.link-file::before,
.lnk-file::before,
.ink-file::before,
.gif-file::before{
content: '🔗';
}
.img-file::before {
content: '🔎';
}
.doc-file::before ,
.docx-file::before{
content: '📝';
}
.ppt-file::before ,
.pptx-file::before{
content: '🧨';
}
.xlsx-file::before ,
.xls-file::before{
content: '📊';
}
.ttf-file::before ,
.woff-file::before,
.woff2-file::before{
content: '🌰';
}
.ogg-file::before ,
.mp3-file::before{
content: '🥭';
}
a {
text-decoration: none;
cursor: pointer;
color: #000;
transition: all ease-in-out 0.3s;
}
a:hover {
color: teal;
}
.container {
display: flex;
width: 75%;
margin: 0 auto;
margin-top: 100px;
flex-wrap: wrap;
}
.container a {
display: inline-block;
margin: 10px;
width: 200px;
overflow:hidden;
padding: 10px;
}
</style>
</head>
<body>
<div class="container"></div>
</body>
</html>
`
const isWindow = () => process.platform === 'win32'
const isMac = () => process.platform === 'darwin'
// 获取文件后缀
const getExt = (urlString) => path.extname(nodeURL.parse(urlString).pathname)
const createIndexPage = (url) => `${isSingle ? path.join(__dirname, directorFolder, indexPage) : `${url}//${indexPage}`}`
// 文件类型判断
const isHTML = (file) => /\.html$/.test(file)
const isTxt = (file) => /\.(txt|log)/.test(file)
const isCss = (file) => /\.(css)$/.test(file)
const isJs = (file) => /\.(js)$/.test(file)
const isJsx = (file) => /\.(jsx)$/.test(file)
const isTs = (file) => /\.ts$/.test(file)
const isTsx = (file) => /\.(tsx)$/.test(file)
const isVue = (file) => /\.(vue)$/.test(file)
const isPython = (file) => /\.(py)$/.test(file)
const isRuby = (file) => /\.(rb)$/.test(file)
const isGo = (file) => /\.(go)$/.test(file)
const isRust = (file) => /\.(rs)$/.test(file)
const isSwift = (file) => /\.(swift)$/.test(file)
const isKotlin = (file) => /\.(kt)$/.test(file)
const isPhp = (file) => /\.(php)$/.test(file)
const isPerl = (file) => /\.(pl)$/.test(file)
const isMatlab = (file) => /\.(m)$/.test(file)
const isLua = (file) => /\.(lua)$/.test(file)
const isC = (file) => /\.(c|cpp|h|cc|cxx)$/.test(file)
const isR = (file) => /\.(r)$/.test(file)
const isClassFile = (file) => /\.(class)$/.test(file)
const isJavaFile = (file) => /\.(java)$/.test(file)
const isSQL = (file) => /\.(sql|bson|json|dump|bak|ldf|mdf|dmp|dat|idx)$/i.test(file)
const isApk = (file) => /\.(apk)$/i.test(file)
const isImage = (file) => /\.(png|jpg|jpeg|apng|avif|bmp|gif|ico|cur|svg|tiff|webp)$/.test(file)
const isLink = (file) => /\.(link|lnk|ink)$/.test(file)
const isCompress = (file) => /\.(zip|gz|tar|7z|rar|gzip|bzip|bzip2)$/i.test(file)
const isMd = (file) => /\.(md)$/.test(file)
const isRunFile = (file) => /\.(exe|sh|com|bat|msi|dll|bin|out|pl|jar)$/i.test(file)
const isConfigFile = (file) => /\.(ini|conf|cfg|rc|properties|plist|htaccess|cnf|yml|yaml|ddl)$/i.test(file)
// 针对不同请求返回不同格式
const getType = (url, is_html = false) => is_html ? 'text/html;charset=utf-8' : MEDIA_TYPE[getExt(url)] || `text/plain;charset=utf-8`
const getTagStr = (url, isFolder = false) => {
const fileName = path.basename(url)
if (isFolder) {
return `<a class="folder" href="${url}">${fileName}</a>`
} else {
return `<a class="file ${getClassName(url)}" href="${url}" >${fileName}</a>`
}
}
// 将 \ 或者 \\ 或者 // 转换成 /
const getRequestUrl = (folderPath) => {
return ("/" + folderPath.split(path.join(__dirname, directorFolder))[1].replace(/\\\\/ig, "/")).replace(/\\/ig, "/").replace(/\/\/\//g, "/").replace(/\/\//g, "/")
}
// 文件同步读取
const readFile = (p, mode = 'utf-8') => {
try {
if (!fs.existsSync(p)) {
errorLog(`文件不存在！${p}`)
return ''
}
return fs.readFileSync(p)
} catch (e) {
errorLog(e)
return ''
}
}
const errorLog = (msg, log = "error.log",) => {
msg = `\n=================${new Date()}==============\n ${msg} \n==============================================================================`
fs.appendFile(path.join(__dirname, directorFolder, log), msg, (err) => {
if (err) {
console.warn('日志写入失败！', err)
}
})
}
// 暂时不处理ico格式文件
// 在此处可以错拦截请求管理
const isAllowResolve = (url) => {
return !(url.indexOf('favicon.ico') !== -1) && !(url.startsWith('http://') || url.startsWith('https://'))
}
const MEDIA_TYPE = {
'.jpg': 'image/jpeg',
'.jpeg': 'image/jpeg',
'.png': 'image/png',
'.gif': 'image/gif',
'.bmp': 'image/bmp',
'.webp': 'image/webp',
'.svg': 'image/svg+xml',
'.csv': 'text/csv;charset=utf-8',
'.html': 'text/html;charset=utf-8',
'.txt': 'text/plain;charset=utf-8',
'.log': 'text/plain;charset=utf-8',
'.css': 'text/css;charset=utf-8',
'.js': 'text/javascript;charset=utf-8',
'.md': 'text/plain;charset=utf-8', // 暂时将md文件设置为浏览器可读
'.xml': 'application/xml',
'.pdf': 'application/pdf',
'.xlsx': 'application/vnd.ms-excel',
'.xls': 'application/vnd.ms-excel',
'.doc': 'application/msword',
'.docx': 'application/msword',
'.ppt': 'application/vnd.ms-powerpoint',
'.pptx': 'application/vnd.ms-powerpoint',
'.ttf': 'application/font-woff',
'.woff': 'application/font-woff',
'.woff2': 'application/font-woff',
'.zip': 'application/zip',
'.7z': 'application/zip',
'.tar': 'application/zip',
'.rar': 'application/zip',
'.gzip': 'application/zip',
'.bzip': 'application/zip',
'.bzip2': 'application/zip',
'.mp4': 'video/mp4',
'.json': 'application/json',
'.webm': 'video/webm',
'.ogg': 'video/ogg',
'.mp3': 'audio/mpeg',
'.wav': 'audio/wav',
};
const getClassName = (url) => {
if (isMd(url)) {
return 'md-file'
}
if (isHTML(url)) {
return 'html-file'
}
if (isMatlab(url)) {
return 'matlab-file'
}
if (isPython(url)) {
return 'python-file'
}
if (isR(url)) {
return 'r-file'
}
if (isSwift(url)) {
return 'swift-file'
}
if (isGo(url)) {
return 'go-file'
}
if (isJs(url)) {
return 'js-file'
}
if (isPerl(url)) {
return 'pl-file'
}
if (isRust(url)) {
return 'rust-file'
}
if (isRuby(url)) {
return 'ruby-file'
}
if (isKotlin(url)) {
return 'kotlin-file'
}
if (isPhp(url)) {
return 'php-file'
}
if (isLua(url)) {
return 'lua-file'
}
if (isC(url)) {
return 'c-file'
}
if (isJsx(url)) {
return 'jsx-file'
}
if (isTs(url)) {
return 'ts-file'
}
if (isTsx(url)) {
return 'tsx-file'
}
if (isVue(url)) {
return 'vue-file'
}
if (isCss(url)) {
return 'css-file'
}
if (isTxt(url)) {
return 'txt-file'
}
if (isJavaFile(url)) {
return 'java-file'
}
if (isClassFile(url)) {
return 'class-file'
}
if (isConfigFile(url)) {
return 'config-file'
}
if (isImage(url)) {
return 'img-file'
}
if (isLink(url)) {
return 'link-file'
}
if (isRunFile(url)) {
return 'run-file'
}
if (isApk(url)) {
return 'apk-file'
}
if (isSQL(url)) {
return 'database-file'
}
if (isCompress(url)) {
return 'compress-file'
}
return MEDIA_TYPE[getExt(url)] ? `${getExt(url).replace(/\./, '')}-file` : 'unknown-file'
}
// 页面
class Page {
constructor(url, content, is_html = false) {
this.pageUrl = url
this.content = content
this.contentType = getType(url, is_html)
}
}
// LRU缓存
class LRUCache {
constructor(capacity) {
this.capacity = capacity;
this.cache = new Map();
}
get(key) {
if (this.cache.has(key)) {
const value = this.cache.get(key);
this.cache.delete(key);
this.cache.set(key, value);
return value;
}
return -1; // 如果缓存中不存在指定的键，则返回 -1
}
set(key, value) {
if (this.cache.has(key)) {
this.cache.delete(key);
} else if (this.cache.size >= this.capacity) {
const oldestKey = this.cache.keys().next().value;
this.cache.delete(oldestKey);
}
this.cache.set(key, value);
}
remove(key) {
if (this.cache.has(key)) {
this.cache.delete(key);
}
}
}
const allReqUrl = []
const MAX_PAGE_SIZE = 100
const NotFoundPageUrl = []
const NOT_FOUND_PAGE = new Page("404.html", NotFound, true)
const COMMAND_KEY = "COMMAND_KEY"
const hostname = '127.0.0.1'
let count = 0
let pageCache = null
/* command args */
let port = 8080
let isParseIndexHtml = false // 是否直接映射当前目录中index.html 对于单文件app应该是启用这个参数
let indexPage = 'index.html'
let isSingle = false // 是否是单文件
let directorFolder = '.'
let refreshTime = 3000
/**
* 启动入口
*/
const server = http.createServer((request, response) => {
let req_url = decodeURIComponent(request.url)
// 是否是错误请求
if (NotFoundPageUrl.indexOf(request.url) !== -1) {
responseTemplate(request, response, NOT_FOUND_PAGE)
return;
}
// 是否是允许的请求
if (isAllowResolve(req_url)) {
// 请求是否存在以及是否缓存了如果请求没有缓存走该请求
if (allReqUrl.indexOf(req_url) === -1) {
responseContent(request, response)
return;
}
// 响应处理
const cacheContent = pageCache.get(req_url)
if (cacheContent === -1) {
responseContent(request, response)
return;
}
responseTemplate(request, response, cacheContent ?? NOT_FOUND_PAGE)
}
})
const hasExt = (url) => {
return !!url && ((url.indexOf('.') !== -1) || url === '/')
}
/**
* 请求的文件
* @param {*} request 请求
* @param {*} response 响应
*/
const responseContent = (request, response) => {
let url = request.url
const parsedUrl = nodeURL.parse(request.url, true);
// 获取URL中的哈希部分
// console.log('请求路径',parsedUrl)
if (url.indexOf('?') !== -1) {
const arr = url.split('?')
url = arr[0]
}
let real_url = path.join(__dirname, directorFolder, decodeURIComponent(url));
let requestUrl = decodeURIComponent(url)
try {
const status = fs.statSync(real_url)
// 对于没有后缀并且不是文件夹的内容直接不处理！
if (!hasExt(url)) {
if (status.isDirectory() && isParseIndexHtml) {
const indexHtml = createIndexPage(real_url)
if (fs.existsSync(indexHtml)) {
let content = readFile(indexHtml)
// 响应页面内容
const this_page = new Page(requestUrl, content, false)
responseTemplate(request, response, this_page)
// 缓存本次 请求
allReqUrl.push(requestUrl)
pageCache.set(requestUrl, this_page)
}
}
return;
}
if (status.isDirectory()) {
// 读取文件夹内容
curReadFolder(real_url)
// 响应一个生成的页面
const page = pageCache.get(requestUrl)
responseTemplate(request, response, page !== -1 ? page : NOT_FOUND_PAGE)
} else {
const content = readFile(real_url)
if (!content) {
if (!isSingle) {
responseErrorPage(request, response, "请求内容不存在")
// 缓存本次请求
NotFoundPageUrl.push(requestUrl)
}
} else {
// 响应页面内容
const this_page = new Page(requestUrl, content, false)
responseTemplate(request, response, this_page)
// 缓存本次 请求
allReqUrl.push(requestUrl)
pageCache.set(requestUrl, this_page)
}
}
} catch (error) {
if (!isSingle) {
responseErrorPage(request, response, error)
}
}
}
/**
* 响应一个异常请求的页面
* @param {*} request request
* @param {*} response response
* @param {*} message 错误详情
* @param {*} template 指定错误模板
* @param {*} url 错误连接，默认是 请求地址
*/
const responseErrorPage = (request, response, message, template, url) => {
let errorContent = null
url = url ?? request.url
template = template ?? NotFound
if (message) {
errorContent = template.replace(/<h2>(.*?)<\/h2>/, `<h2 style="color:red;">${message.toString()}<\/h2>`)
}
responseTemplate(request, response, new Page(url, message && errorContent ? errorContent : 'error', true))
}
/**
* 响应内容
* @param {*} request 请求
* @param {*} response 响应
* @param {*} page page类的对象
*/
const responseTemplate = (request, response, page) => {
try {
response.setHeader('Content-Type', page.contentType);
// !!! todo 如果直接使用内容长短不知道为什么报错 容易确实文件
// response.setHeader('Content-length', page.content.length);
response.write(page.content);
response.end();
} catch (error) {
// ignore ...
}
}
/**
* 响应文件下第一层文件，包括文件和目录
* @param {*} folderPath 路径
* @param cache
*/
const curReadFolder = (folderPath, cache = pageCache) => {
let content = ''
let reqUrl = folderPath === path.join(__dirname, directorFolder) ? '/' : decodeURIComponent(getRequestUrl(folderPath))
const indexHtml = createIndexPage(folderPath)
if (isParseIndexHtml && fs.existsSync(indexHtml)) {
content = readFile(indexHtml)
} else {
let temp = ''
// curr file
const files = fs.readdirSync(folderPath)
files.forEach((fileName) => {
const filePath = path.join(folderPath, fileName);
try {
// file url => file content
let this_url = getRequestUrl(filePath)
let isDirectory = fs.statSync(filePath).isDirectory()
temp += getTagStr(this_url, isDirectory)
} catch (error) {
errorLog(error)
console.warn('stats error:', error)
}
});
// create title 🧵
let title = path.basename(reqUrl) === '/' || path.basename(reqUrl) === '' ? '首页' : path.basename(reqUrl)
content = Template.replace(/<title>(.*?)<\/title>/, `<title>${title}</title>`).replace(/<div class="container">(.*?)<\/div>/, `<div class="container">${temp}</div>`)
}
cache.set(reqUrl, new Page(reqUrl, content, true))
allReqUrl.push(reqUrl)
return content
}
/* child worker */
const watch = (message) => {
if (message instanceof Map) {
for (let [k, v] of message.entries()) {
if (k === COMMAND_KEY) {
// init child params!
const command = message.get(COMMAND_KEY)
isParseIndexHtml = command.index
indexPage = command.indexPage
directorFolder = command.directorFolder
isSingle = command.single
port = command.port
refreshTime = command.refresh
} else {
watchFileChange(v, message)
}
}
// update content notify parent !
parentPort.postMessage(message);
}
}
const watchFileChange = (page, cache) => {
if (!(cache instanceof Map)) {
return;
}
if (!page?.pageUrl || !page?.content || !page?.contentType) {
return;
}
let pageUrl = page.pageUrl
let real_url = path.join(__dirname, directorFolder, decodeURIComponent(pageUrl));
if (!fs.existsSync(real_url)) {
console.log('file or folder is not exist:', real_url)
return;
}
const status = fs.statSync(real_url)
if (status.isDirectory()) {
curReadFolder(real_url, cache)
} else {
try {
const data = readFile(real_url)
if (data.toString() !== page.content.toString()) {
cache.set(pageUrl, new Page(pageUrl, data))
}
} catch (error) {
errorLog(error)
}
}
}
const openWebPage = (url = `http://${hostname}:${port}`) => {
let command = ''
let isInitSystemCommand = false
if (!isInitSystemCommand) {
if (isWindow()) {
command = 'start'
isInitSystemCommand = true
} else if (isMac()) {
command = 'open'
isInitSystemCommand = true
} else {
// Linux ? or unknown platform
isInitSystemCommand = false
}
}
if (isInitSystemCommand) {
exec(`${command} ${url}`, (error, stdout, stderr) => {
if (error) {
console.error(`浏览器打开失败！错误详情: ${error}`);
errorLog(error)
return;
}
if (stderr) {
console.error(`浏览器打开失败！错误详情: ${stderr}`);
errorLog(error)
return;
}
console.log(`live-server 启动成功！点击访问 ${url}`)
})
} else {
console.log(`当前环境不支持打开默认浏览器 请手动打开！${url}`)
}
}
const cacheUpdate = (message) => {
if (!(message instanceof Map)) {
return;
}
for (let [k, v] of message.entries()) {
if (k !== COMMAND_KEY) {
pageCache.set(k, v)
}
}
}
class Command {
/**
*
* @param index 是否默认打开 指定 页 默认是 index.html
* @param indexPage 默认页 index.html
* @param root 项目启动指定跟路径 默认 当前路径
* @param single 是否开启单文件模式
* @param port 端口号
* @param refresh 刷新时间间隔
*/
constructor(index, indexPage, root, single, port, refresh) {
this.index = !!index
this.indexPage = indexPage
this.directorFolder = root
this.single = single
this.port = isNaN(Number(port)) ? 8080 : Number(port)
this.refresh = isNaN(Number(refresh)) ? 3000 : Number(refresh)
// todo more command
}
}
let commandObj = null
const childWorkerRun = () => {
const childWorker = new Worker(__filename);
pageCache.cache.set(COMMAND_KEY, commandObj)
setInterval(() => {
childWorker.postMessage(pageCache.cache);
}, refreshTime);
childWorker.on('message', message => {
cacheUpdate(message)
});
}
const runCommand = () => {
if (includeCommand('--blog') || includeCommand('-b')) {
openWebPage('https://wuxin0011.github.io/tools/node-live-serve/')
} else if (includeCommand(help) || includeCommand('-h')) {
helpCommand()
} else {
console.log(`\nuse node ${path.basename(__filename)} ${help} look more \n`)
parseParseIndexHtmlParams()
parseSingleParams()
parseRefreshTimeParams()
parsePortParams()
run()
}
}
const run = () => {
/* init command */
commandObj = new Command(isParseIndexHtml, indexPage, directorFolder, isSingle, port, refreshTime)
/* init cache */
pageCache = new LRUCache(MAX_PAGE_SIZE)
// run
const start = (error) => {
if (count < 20) {
try {
server.listen({
host: hostname,
port: port
}, () => {
curReadFolder(path.join(__dirname, directorFolder))
openWebPage()
childWorkerRun()
})
server.on('error', (error) => {
console.error(`run fail ${error} `)
port += 1
count += 1
start(error)
})
} catch (error) {
console.error(`run fail ${error} `)
port += 1
count += 1
start(error)
}
} else {
console.error('启动失败:', error)
server.close()
errorLog(error)
}
}
start()
}
const includeCommand = (arg) => {
if (!arg) {
return false
}
return process.argv.findIndex(param => param.indexOf(arg) !== -1) !== -1
}
const parseCommandArgs = (arg, defaultValue) => {
if (defaultValue === undefined) {
console.log('defaultValue is undefined')
return undefined;
}
if (!arg) {
console.log('args is null or undefined')
return defaultValue
}
for (let i = 0; i < process.argv.length; i++) {
const params = process.argv[i]
if (params.indexOf(arg) !== -1) {
if (params.indexOf('=') !== -1) {
let s = params.split('=')
return s[s.length - 1]
} else {
return defaultValue
}
}
}
return defaultValue
}
const help = '--help'
const parseIndexHtml = '--index'
const portCommand = '--port'
const refreshCommand = '--time'
const helpCommand = () => {
console.log(`
node ${path.basename(__filename)} [command] \n
command list: \n
command description
===============================================================================================
--help,-h command Description
--blog,-b open blog url address https://wuxin0011.github.io/tools/node-live-serve/
--port,-p specify the startup port number default ${port}
--root,-r directly root folder ,if you want dist to root folder , use --root=dist
--index,-i is it directly mapped to ${indexPage}? if it exists,you can directly index page ,
default ${isParseIndexHtml} ,example --index=index.html or -i=index.html
--single,-s if your app is single app please use --single,
use -s or --single
--time,-t content refresh time default ${refreshTime},example --time=3000
`)
}
const parseParseIndexHtmlParams = () => {
if (includeCommand(parseIndexHtml)) {
isParseIndexHtml = true
indexPage = parseCommandArgs(parseIndexHtml, indexPage)
} else if (includeCommand('-i')) {
isParseIndexHtml = true
indexPage = parseCommandArgs('-i', indexPage)
}
}
const parseSingleParams = () => {
if (includeCommand('--root') || includeCommand('-r')) {
directorFolder = parseCommandArgs(includeCommand('--root') ? '--root' : '-r', directorFolder)
// check file is exist ?
const file = path.join(__dirname, directorFolder)
if (!fs.existsSync(file)) {
throw new Error(`${directorFolder} folder is not exist ,please check folder exist!, example --root=dist or -r=dist !`)
}
}
if (includeCommand('--single') || includeCommand('-s')) {
isSingle = true
isParseIndexHtml = true
// check file is exist ?
const file = path.join(__dirname, directorFolder, indexPage)
if (!fs.existsSync(file)) {
throw new Error(`${file} is not exist ,please check file !`)
}
}
}
const parseRefreshTimeParams = () => {
if (includeCommand(refreshCommand) || includeCommand('-t')) {
try {
refreshTime = Number(parseCommandArgs(includeCommand('-t') ? '-t' : refreshCommand, 3000))
if (isNaN(refreshTime)) {
console.warn('refreshTime must be a number use default 3000!')
refreshTime = 3000
}
if (refreshTime < 16) {
console.warn(`refreshTime ${refreshTime} not allow refreshTime min>=16,with use default 3000 `)
refreshTime = 3000
}
} catch (error) {
console.log(`${refreshCommand} command is parse fail ,${error}`)
refreshTime = 3000
}
}
}
const parsePortParams = () => {
if (includeCommand(portCommand) || includeCommand('-p')) {
try {
port = parseInt(parseCommandArgs(includeCommand('-p') ? '-p' : portCommand, port))
if (port <= 1) {
console.warn(`port ${port} not allow ,with use default `)
port = 8080
}
} catch (error) {
port = 8080
console.log(`${portCommand} command is parse fail port default 8080! `)
}
}
}
const bootStrap = () => {
if (isMainThread) {
runCommand()
} else {
parentPort.on('message', message => {
watch(message)
});
}
}
/* run */
bootStrap()
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使用
拷贝上面 js 文件,如 server.js
启动
node server.js
1
# 演示效果
# 问题
存在问题
- 自动下载一些文件
- 界面不好看
已处理
- 注释了
content-length字段之后，内容显示正常了
编辑 (opens new window)
上次更新: 2024-05-21, 09:50:09