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index.js
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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.
}
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 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;
}
}
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_key
else
save_url(URL)
}
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_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]
console.log(path)
if(!path){
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)
console.log(value)
const location = 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 404
return new Response(html404, {
headers: {
"content-type": "text/html;charset=UTF-8",
},
status: 404
})
}
addEventListener("fetch", async event => {
event.respondWith(handleRequest(event.request))
})