无服务器 自建短链服务 Url-Shorten-Worker 修改为自用
基于GitHub项目https://github.com/xyTom/Url-Shorten-Worker
本质是使用Cloudflare的Workers搭一个网页服务，使用Cloudflare的KV当"数据库"用。
因为Cloudflare的KV免费档 "100,000 - 每日键值读取"，不想公开给别人扫。所以修改一下。
基本修改思路就是，直接访问域名返回404。有一个特别的path才是真正的使用界面。
修改原项目的https://github.com/xyTom/Url-Shorten-Worker/blob/main/index.js#L129=
判断path为空的条件里面改成返回404
return new Response(html404, {headers: {"content-type": "text/html;charset=UTF-8",},status: 404})
在Cloudflare的KV里存一个key为"password"，value为随机值的entry.
随机值可以使用http://git.io/xkcdpw生成
随机值以 yejiandianci 为例
我们把这个随机值当作真正的使用界面的path
/* 查KV中的password对应的值 */const password_value = await LINKS.get("password");if (path==password_value){const html= await fetch("https://xytom.github.io/Url-Shorten-Worker/"+config.theme+"/index.html")return new Response(await html.text(), {headers: {"content-type": "text/html;charset=UTF-8",},})}
把index.js部署到Workers里面去。
测试一下
本文的短链地址：1ladder.eu.org/paaJyN
------
const config = {no_ref: "off", //Control the HTTP referrer header, if you want to create an anonymous link that will hide the HTTP Referer header, please set to "on" .theme:"",//Homepage theme, use the empty value for default theme. To use urlcool theme, please fill with "theme/urlcool" .cors: "on",//Allow Cross-origin resource sharing for API requests.unique_link:false,//If it is true, the same long url will be shorten into the same short urlcustom_link:false,//Allow users to customize the short url.}const html404 = `<!DOCTYPE html><body><h1>404 Not Found.</h1><p>The url you visit is not found.</p><a href="https://github.com/xyTom/Url-Shorten-Worker/" target="_self">Fork me on GitHub</a></body>`let response_header={"content-type": "text/html;charset=UTF-8",}if (config.cors=="on"){response_header={"content-type": "text/html;charset=UTF-8","Access-Control-Allow-Origin":"*","Access-Control-Allow-Methods": "POST",}}async function randomString(len) {len = len || 6;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 sha512(url){url = new TextEncoder().encode(url)const url_digest = await crypto.subtle.digest({name: "SHA-512",},url, // The data you want to hash as an ArrayBuffer)const hashArray = Array.from(new Uint8Array(url_digest)); // convert buffer to byte arrayconst hashHex = hashArray.map(b => b.toString(16).padStart(2, '0')).join('');//console.log(hashHex)return hashHex}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;elsereturn false;}else{return false;}}async function save_url(URL){let random_key=await randomString()let is_exist=await LINKS.get(random_key)console.log(is_exist)if (is_exist == null)return await LINKS.put(random_key, URL),random_keyelsesave_url(URL)}async function is_url_exist(url_sha512){let is_exist = await LINKS.get(url_sha512)console.log(is_exist)if (is_exist == null) {return false}else{return is_exist}}async function handleRequest(request) {console.log(request)if (request.method === "POST") {let req=await request.json()console.log(req["url"])if(!await checkURL(req["url"])){return new Response(`{"status":500,"key":": Error: Url illegal."}`, {headers: response_header,})}let stat,random_keyif (config.unique_link){let url_sha512 = await sha512(req["url"])let url_key = await is_url_exist(url_sha512)if(url_key){random_key = url_key}else{stat,random_key=await save_url(req["url"])if (typeof(stat) == "undefined"){console.log(await LINKS.put(url_sha512,random_key))}}}else{stat,random_key=await save_url(req["url"])}console.log(stat)if (typeof(stat) == "undefined"){return new Response(`{"status":200,"key":"/`+random_key+`"}`, {headers: response_header,})}else{return new Response(`{"status":200,"key":": Error:Reach the KV write limitation."}`, {headers: response_header,})}}else if(request.method === "OPTIONS"){return new Response(``, {headers: response_header,})}const requestURL = new URL(request.url)const path = requestURL.pathname.split("/")[1]const params = requestURL.search;console.log(path)if(!path){return new Response(html404, {headers: {"content-type": "text/html;charset=UTF-8",},status: 404})}/* 查KV中的password对应的值 */const password_value = await LINKS.get("password");if (path==password_value){const html= await fetch("https://xytom.github.io/Url-Shorten-Worker/"+config.theme+"/index.html")return new Response(await html.text(), {headers: {"content-type": "text/html;charset=UTF-8",},})}const value = await LINKS.get(path);let location ;if(params) {location = value + params} else {location = value}console.log(value)if (location) {if (config.no_ref=="on"){let no_ref= await fetch("https://xytom.github.io/Url-Shorten-Worker/no-ref.html")no_ref=await no_ref.text()no_ref=no_ref.replace(/{Replace}/gm, location)return new Response(no_ref, {headers: {"content-type": "text/html;charset=UTF-8",},})}else{return Response.redirect(location, 302)}}// If request not in kv, return 404return new Response(html404, {headers: {"content-type": "text/html;charset=UTF-8",},status: 404})}addEventListener("fetch", async event => {event.respondWith(handleRequest(event.request))})
评论
发表评论