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index.js
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const config = {
//控制 HTTP referer header，如果你想创建一个隐藏 HTTP Referer header 的匿名链接，请设置为“on”。
no_ref: "on",
//首页主题，默认主题为空。 要使用其它主题，请填写 "theme/name" 。
theme:"",
//是否允许API请求的跨源资源共享。
cors: "on",
//相同的长url是否使用同一个短url。
unique_link:true,
//允许用户自定义短url。
custom_link:true,
//输入 Google 安全浏览 API 密钥以在重定向前启用 url 安全检查。
safe_browsing_api_key: ""
}
const html404 = `<!DOCTYPE html>
<body>
<h1>404 Not Found.</h1>
<p>The url you visit is not found.</p>
<a href="https://github.com/xramas/Urlcreate/" 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 = 'ABCDEFGHKLMNOPRSTUVWXYZabcdehikmnorstuvwxz023456789'; /****去除了：I\J\Q\f\g\j\l\p\q\y****/
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, //您要散列为 ArrayBuffer 的数据
)
const hashArray = Array.from(new Uint8Array(url_digest)); //将缓冲区转换为字节数组
const 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;
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 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 is_url_safe(url){
let raw = JSON.stringify({"client":{"clientId":"Url-Shorten-Worker","clientVersion":"1.0.7"},"threatInfo":{"threatTypes":["MALWARE","SOCIAL_ENGINEERING","POTENTIALLY_HARMFUL_APPLICATION","UNWANTED_SOFTWARE"],"platformTypes":["ANY_PLATFORM"],"threatEntryTypes":["URL"],"threatEntries":[{"url":url}]}});
let requestOptions = {
method: 'POST',
body: raw,
redirect: 'follow'
};
result = await fetch("https://safebrowsing.googleapis.com/v4/threatMatches:find?key=AIzaSyB9hnLmYPihUefkSl9Mnxui35NDCJVw650", requestOptions)
result = await result.json()
console.log(result)
if (Object.keys(result).length === 0){
return true
}else{
return false
}
}
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
if (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){
const html= await fetch("https://xramas.github.io/Pages/Urlcreate/"+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.safe_browsing_api_key){
if(!(await is_url_safe(location))){
let warning_page = await fetch("https://xramas.github.io/Pages/Urlcreate/safe-browsing.html")
warning_page =await warning_page.text()
warning_page = warning_page.replace(/{Replace}/gm, location)
return new Response(warning_page, {
headers: {
"content-type": "text/html;charset=UTF-8",
},
})
}
}
if (config.no_ref=="on"){
let no_ref= await fetch("https://xramas.github.io/Pages/Urlcreate/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))
})