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| addEventListener('fetch', event => {
event.respondWith(handleRequest(event.request))
})
function parseURL(url) {
let urlbody = url.substr(8);
urlbody = decodeURIComponent(urlbody.substr(urlbody.indexOf('/') + 1))
console.log(" Parsing: URLBody: " + urlbody)
let split_header_url = urlbody.lastIndexOf("/", urlbody.search("://"))
let real_url = urlbody.substr(split_header_url + 1)
if (!real_url) {
throw "Invalid real URL: " + urlbody
}
let headersbody = urlbody.substr(0, split_header_url)
console.log(" Parsing: Real URL: " + real_url)
console.log(" Parsing: Headers JSON: " + headersbody)
if (!headersbody) {
return {
url: real_url,
headers: {},
}
}
if (!headersbody.startsWith("{")) {
headersbody = decodeURIComponent(headersbody)
}
if (!headersbody.startsWith("{")) {
throw "Invalid URL headers string: " + headersbody
}
headers = JSON.parse(headersbody)
return {
url: real_url,
headers: headers,
}
}
async function handleRequest(request) {
if (request.method == "OPTIONS") {
return new Response("", {status:200, headers:{
"Access-Control-Allow-Credentials": true,
"Access-Control-Allow-Headers": "*",
"Access-Control-Allow-Methods": "*",
"Access-Control-Allow-Origin": "*",
"Access-Control-Max-Age": "31536000",
"X-Request-Type": "CORS Preflight"
}});
}
let reqHeaders = new Headers(request.headers),
outBody, outStatus = 200, outCt = null, outHeaders = new Headers({
"Access-Control-Allow-Origin": "*",
"Access-Control-Allow-Methods": "GET, POST, PUT, PATCH, DELETE, OPTIONS",
"Access-Control-Allow-Headers": reqHeaders.get('Access-Control-Allow-Headers') || "Accept, Authorization, Cache-Control, Content-Type, DNT, If-Modified-Since, Keep-Alive, Origin, User-Agent, X-Requested-With, Token, x-access-token"
});
try {
console.log("Got Raw ReqUrl: " + request.url)
let t = parseURL(request.url)
let url = t.url
let headers = t.headers
console.log("Parsed URL body: " + url)
console.log("Parsed URL headers: " + JSON.stringify(headers))
if (url.length < 3 || url.indexOf('.') == -1) {
throw "invalid URL input: " + url;
} else if (url == "favicon.ico" || url == "robots.txt") {
return Response.redirect('https://workers.cloudflare.com', 307)
} else {
if (url.toLowerCase().indexOf("http") == -1) {
url = "http://" + url;
}
let fp = {
method: request.method,
headers: {}
}
let he = reqHeaders.entries();
for (let h of he) {
if (!['content-length', 'content-type'].includes(h[0])) {
fp.headers[h[0]] = h[1];
}
}
if (headers["_method"] !== undefined) {
fp.method = headers["_method"].toUpperCase()
}
fp.headers = Object.assign({}, fp.headers, headers)
if (["POST", "PUT", "PATCH", "DELETE"].indexOf(request.method) >= 0) {
const ct = (reqHeaders.get('content-type') || "").toLowerCase();
if (ct.includes('application/json')) {
fp.body = JSON.stringify(await request.json());
} else if (ct.includes('application/text') || ct.includes('text/html')) {
fp.body = await request.text();
} else if (ct.includes('form')) {
fp.body = await request.formData();
} else {
fp.body = await request.blob();
}
}
if (headers["_body"] !== undefined) {
fp.body = headers["_body"]
}
let fr = (await fetch(url, fp));
outStatus = fr.status;
outCt = fr.headers.get('content-type');
outBody = fr.body;
}
} catch (err) {
outStatus = 500
outCt = "application/json";
outBody = JSON.stringify({
code: -1,
msg: JSON.stringify(err.stack) || err
});
}
if (outCt && outCt != "") {
outHeaders.set("content-type", outCt);
}
return new Response(outBody, {
status: outStatus,
headers: outHeaders
})
}
|
