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| const html404 = `<!DOCTYPE html>
<body>
<h1>404 0.</h1>
<p>0.</p>
</body>`
// const statichtml = "https://raw.githubusercontent.com/1x000/zdzy/main/duanlnk/index.html"
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 += $chars.charAt(Math.floor(Math.random() * maxPos))
}
return result
}
async function checkURL (URL) {
let str = URL
let Expression = /http(s)?:\/\/([\w-]+\.)+[\w-]+(\/[\w- .\/?%&=]*)?/
let objExp = new RegExp(Expression)
return objExp.test(str) && str[0] === 'h'
}
async function save_url (URL, shortStr) {
console.log("shortStr:", shortStr)
let random_key
if (!shortStr) {
random_key = await randomString()
} else {
random_key = shortStr
}
let is_exist = await LINKS.get(random_key)
console.log(is_exist)
if (is_exist == null) {
// 正常，直接放入
let stat = await LINKS.put(random_key, URL)
if (typeof (stat) === "undefined") return random_key
else return stat
} else if (!shortStr) {
// 生成的random_key重复了，递归调用
return save_url(URL, null)
} else
// 自定义的路径已经存在了
return -1
}
async function handleRequest (request) {
console.log(request)
if (request.method === "POST") {
let req = await request.json()
console.log(req["url"])
if (!await checkURL(req["url"]))
return new Response(`{"msg":"0"}`, { status: 400, headers: { "Content-Type": "application/json" } })
let random_key = await save_url(req["url"], req["shortStr"])
console.log(random_key)
// 放成功了
if (Object.prototype.toString.call(random_key) === "[object String]")
return new Response(`{"data":{"shortUrl":"${random_key}"}}`, { status: 200, headers: { "Content-Type": "application/json" } })
// 自定义的路径重复了
else if (random_key === -1)
return new Response(`{"msg":"0"}`, { status: 400, headers: { "Content-Type": "application/json" } })
// 没测试k-v满了之后会怎么样，如果有错的话put时应该会有返回（猜测（懒
else return new Response(`{"msg":"0"}`, { status: 500, headers: { "Content-Type": "application/json" } })
}
const requestURL = new URL(request.url)
// todo 规范路径的'/'
const path = requestURL.pathname.toString().substring(1);
console.log(path)
if (!path) {
const html = await fetch(statichtml)
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) {
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))
})
|