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index.js
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index.js
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const config = {
no_ref: "on", //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: true,//If it is true, the same long url will be shorten into the same short url
custom_link: true,//Allow users to customize the short url.
safe_browsing_api_key: ${ env.safe_browsing_api_key } //Enter Google Safe Browsing API Key to enable url safety check before redirect.
}
const html404 = `<!DOCTYPE html>
<body>
<h1>404 Not Found.</h1>
<p>The url you visit is not found.</p>
</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 || 3;
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 array
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=" + config.safe_browsing_api_key, 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("http://jeffreyhung.com/tyrion/" + 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("http://jeffreyhung.com/tyrion/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("http://jeffreyhung.com/tyrion/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))
})