后面Cloudflare将简称为CF
创建KV空间
自定义命名(随便填)
创建Workers
选择HTTP路由器
添加变量
DEMO_MODE true
DEMO_NOTICE 私人使用，不定期清理链接
GITHUB_REPO AoEiuV020/Url-Shorten-Worker
GITHUB_VERSION @main
PASSWORD 密码绑定KV
变量名称填LINKS KV命名空间就填刚才的自定义名称
编辑短网址
将里面原有的删除，然后把下面的代码复制进去
// 项目名，决定html从哪个项目获取，
const github_repo = typeof(GITHUB_REPO)!="undefined" ? GITHUB_REPO
: 'AoEiuV020/Url-Shorten-Worker'
// 项目版本，cdn会有缓存，所以有更新时需要指定版本，
const github_version = typeof(GITHUB_VERSION)!="undefined" ? GITHUB_VERSION
: '@main'
// 密码，密码正确情况无视白名单和超时设置，且支持自定义短链接，
const password = typeof(PASSWORD)!="undefined" ? PASSWORD
: 'AoEiuV020 yes'
// 短链超时，单位毫秒，支持整数乘法，0表示不设置超时，
const shorten_timeout = typeof(SHORTEN_TIMEOUT)!="undefined" ? SHORTEN_TIMEOUT.split("*").reduce((a,b)=>parseInt(a)*parseInt(b),1)
: (1000 * 60 * 10)
// 默认短链key的长度，遇到重复时会自动延长，
const default_len = typeof(DEFAULT_LEN)!="undefined" ? parseInt(DEFAULT_LEN)
: 3
// 为true开启演示，否则无密码且非白名单请求不受理，是则允许访客试用，超时后失效，
const demo_mode = typeof(DEMO_MODE)!="undefined" ? DEMO_MODE === 'true'
: true
// 为true自动删除超时的演示短链接记录，否则仅是标记过期，以便在后台查询历史记录，
const remove_completely = typeof(REMOVE_COMPLETELY)!="undefined" ? REMOVE_COMPLETELY === 'true'
: true
// 白名单中的域名无视超时，json数组格式，写顶级域名就可以，自动通过顶级域名和所有二级域名，
const white_list = JSON.parse(typeof(WHITE_LIST)!="undefined" ? WHITE_LIST
: `[
"aoeiuv020.com",
"aoeiuv020.cn",
"aoeiuv020.cc",
"020.name"
]`)
// 演示模式开启时网页上展示这段禁止滥用提示，并不需要明确表示什么时候失效，
const demo_notice = typeof(DEMO_NOTICE)!="undefined" ? DEMO_NOTICE
: `注意：为防止示例服务被人滥用，故所有由demo网站生成的链接随时可能失效，如需长期使用请自行搭建。`
//console.log(`${github_repo}, ${github_version}, ${password}, ${shorten_timeout}, ${demo_mode}, ${white_list}, ${demo_notice}`)
const html404 = `<!DOCTYPE html>
<body>
<h1>404 Not Found.</h1>
<p>The url you visit is not found.</p>
</body>`
async function randomString(len) {
let $chars = 'ABCDEFGHJKMNPQRSTWXYZabcdefhijkmnprstwxyz2345678'; /****默认去掉了容易混淆的字符oOLl,9gq,Vv,Uu,I1****/
let maxPos = $chars.length;
let result = '';
for (i = 0; i < len; i++) {
result += $chars.charAt(Math.floor(Math.random() * maxPos));
}
return result;
}
async function checkURL(url){
let str=url;
let Expression=/^http(s)?:\/\/(.*@)?([\w-]+\.)*[\w-]+([_\-.,~!*:#()\w\/?%&=]*)?$/;
let objExp=new RegExp(Expression);
if(objExp.test(str)==true){
if (str[0] == 'h')
return true;
else
return false;
}else{
return false;
}
}
// 检查域名是否在白名单中，参数只包含域名部分，
async function checkWhite(host){
return white_list.some((h) => host == h || host.endsWith('.'+h))
}
async function md5(message) {
const msgUint8 = new TextEncoder().encode(message) // encode as (utf-8) Uint8Array
const hashBuffer = await crypto.subtle.digest('MD5', msgUint8) // hash the message
const hashArray = Array.from(new Uint8Array(hashBuffer)) // convert buffer to byte array
const hashHex = hashArray.map(b => b.toString(16).padStart(2, '0')).join('') // convert bytes to hex string
return hashHex
}
async function checkHash(url, hash) {
if (!hash) {
return false
}
return (await md5(url+password)) == hash
}
async function save_url(url, key, admin, len) {
len = len || default_len;
// 密码正确且指定了key的情况直接覆盖旧值，
const override = admin && key
if (!override) {
// 密码不正确情况无视指定key,
key = await randomString(len)
}
const is_exists = await load_url(key)
console.log("key exists " + key + " " + is_exists)
if (override || !is_exists) {
var mode = 3
if (admin) {
mode = 0
}
let value = `${mode};${Date.now()};${url}`
if (remove_completely && mode != 0 && !await checkWhite(new URL(url).host)) {
// 利用expirationTtl实现过期记录自动删除，低于60秒会报错，
let ttl = Math.max(60, shorten_timeout / 1000)
console.log("key auto remove: " + key + ", " + ttl + "s")
return await LINKS.put(key, value, {expirationTtl: ttl}),key
} else {
return await LINKS.put(key, value),key
}
} else {
return await save_url(url, key, admin, len + 1)
}
}
async function load_url(key) {
const value = await LINKS.get(key)
if (!value) {
return null
}
const list = value.split(';')
console.log("value split " + list)
var url
if (list.length == 1) {
// 老数据暂且正常跳转，
url = list[0]
} else {
url = list[2]
const mode = parseInt(list[0])
const create_time = parseInt(list[1])
if (mode != 0 && shorten_timeout > 0
&& Date.now() - create_time > shorten_timeout) {
const host = new URL(url).host
if (await checkWhite(host)) {
console.log('white list')
} else {
// 超时和找不到做同样的处理，
console.log("shorten timeout")
return null
}
}
}
return url
}
async function handleRequest(request) {
console.log(request)
if (request.method === "POST") {
let req=await request.json()
console.log("url " + req["url"])
let admin = await checkHash(req["url"], req["hash"])
console.log("admin " + admin)
if(!await checkURL(req["url"]) || (!admin && !demo_mode && !await checkWhite(new URL(req["url"]).host))){
// 非演示模式下，非白名单地址当成地址不合法处理，
return new Response(`{"status":500,"key":": Error: Url illegal."}`, {
headers: {
"content-type": "text/html;charset=UTF-8",
"Access-Control-Allow-Origin":"*",
"Access-Control-Allow-Methods": "POST",
},
})}
let stat,random_key=await save_url(req["url"], req["key"], admin)
console.log("stat " + stat)
if (typeof(stat) == "undefined"){
return new Response(`{"status":200,"key":"/`+random_key+`"}`, {
headers: {
"content-type": "text/html;charset=UTF-8",
"Access-Control-Allow-Origin":"*",
"Access-Control-Allow-Methods": "POST",
},
})
}else{
return new Response(`{"status":200,"key":": Error:Reach the KV write limitation."}`, {
headers: {
"content-type": "text/html;charset=UTF-8",
"Access-Control-Allow-Origin":"*",
"Access-Control-Allow-Methods": "POST",
},
})}
}else if(request.method === "OPTIONS"){
return new Response(``, {
headers: {
"content-type": "text/html;charset=UTF-8",
"Access-Control-Allow-Origin":"*",
"Access-Control-Allow-Methods": "POST",
},
})
}
const requestURL = new URL(request.url)
const path = requestURL.pathname.split("/")[1]
console.log(path)
if(!path){
const html= await fetch(`https://cdn.jsdelivr.net/gh/${github_repo}${github_version}/index.html`)
const text = (await html.text())
.replaceAll("###GITHUB_REPO###", github_repo)
.replaceAll("###GITHUB_VERSION###", github_version)
.replaceAll("###DEMO_NOTICE###", demo_notice)
return new Response(text, {
headers: {
"content-type": "text/html;charset=UTF-8",
},
})
}
const url = await load_url(path)
if (!url) {
// 找不到或者超时直接404,
console.log('not found')
return new Response(html404, {
headers: {
"content-type": "text/html;charset=UTF-8",
},
status: 404
})
}
return Response.redirect(url, 302)
}
addEventListener("fetch", async event => {
event.respondWith(handleRequest(event.request))
})添加自定义域名
将域名解析到CF上面，然后CF会自动添加相关的值
演示
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