147 lines
4.4 KiB
JavaScript
147 lines
4.4 KiB
JavaScript
const Component = require("./_component");
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const https = require("https");
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const express = require("express");
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const bodyParser = require("body-parser");
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const bodyHand = require('body');
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const url = require('url');
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const path = require('path');
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const fs = require('fs');
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const fetch = require('node-fetch');
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function logger (...p) {
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//return;
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console.log("[DEBUG.main]:", ...p);
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}
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function fetchProxy (req, res, reverseTo) {
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const params = { method: req.method.toUpperCase(), headers: Object.assign({}, req.headers), redirect: "follow", follow: 20, compress: false };
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delete params.headers.host;
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delete params.headers.referer;
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if (!["GET", "HEAD"].includes(params.method))
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params.body = req.body;
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const reqAddress = url.resolve(reverseTo, path.join("/", req.originalUrl));
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fetch(reqAddress, params)
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.then(async result => {
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const content = await result.arrayBuffer();
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//logger("result:", result);
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//logger("result.arrayBuffer():", content);
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//logger("result.Buffer:", Buffer.from(content).toString());
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const headers = Object.fromEntries(result.headers);
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//logger("headers Headers", result.headers);
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//logger("headers Headers.raw()", result.headers.raw());
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logger("headers object", headers);
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Object.entries(headers).forEach(([header, value]) => {
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res.set(header, value);
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});
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const finalContent = Buffer.from(content);
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res.status(result.status).send(finalContent);
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})
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.catch(err => {
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console.error(err);
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res.status(500).send("<head><title>Error</title></head><body><h1>Error:</h1><hr/><p>Error catched. Check logs</p></body>");
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});
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}
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function authPage (self, req, res, next) {
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if (self.syntax.auth) {
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const ACCESS = "Basic " + Buffer.from(`${self.syntax.auth.login}:${self.syntax.auth.password}`).toString('base64');
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if (req.headers['authorization'] === ACCESS) {
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return next();
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}
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else {
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if (self.syntax.auth.mode === "strict" && req.headers['authorization'] !== undefined) {
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return res.status(403).send("<h1>Permission denied</h1><hr/><p>Permission denied.</p>");
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}
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res.set("WWW-Authenticate", "Basic");
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return res.status(401).send();
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}
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}
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next();
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}
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module.exports = class HTTPReverse extends Component {
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constructor (adr, syntaxTree) {
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super(adr, syntaxTree);
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}
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domainAction (context, domain, callCommand, req, res, next) {
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logger("DOMAIN ACT:", this.syntax);
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if (!(context instanceof HTTPReverse))
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throw new SyntaxError("You can't call revHTTP domain from unsupported type. Supported types: revHTTP, simpleHTTP, redirectHTTP");
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switch (callCommand) {
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case "proxy":
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return fetchProxy(req, res, this.syntax.target);
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case "auth":
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const authContext = context.syntax.auth === undefined ? this : context;
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return authPage(authContext, req, res);
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}
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}
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run () {
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this.app = express();
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const address = this.adr.address ?? "127.0.0.1";
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const reverseTo = this.syntax.target ?? "https://example.org";
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this.app.use('/*', async (req, res, next) => { // Myself body parser :)
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bodyHand(req, res, {
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limit: 9999999999,
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cache: false,
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encoding: 'base64'
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}, (err, body) => {
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if (!err) {
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req.body = Buffer.from(body, 'base64');
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} else {
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req.body = undefined;
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}
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next();
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});
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});
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this.app.use((req, res, next) => {
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const currentDomain = req.hostname;
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const isNotDomained = !this.syntax.domains[currentDomain];
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if (!isNotDomained) {
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return this
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.callDomain(currentDomain, this.syntax.domains[currentDomain])
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.argv("auth", req, res, next);
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}
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authPage(this, req, res, next)
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});
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this.app.use("*", async (req, res) => {
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logger("REQ HEADERS:>", req.headers);
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logger("originalUrl:>", req.originalUrl);
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const currentDomain = req.hostname;
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logger("hostname:", currentDomain);
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const isNotDomained = !this.syntax.domains[currentDomain];
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if (!isNotDomained) {
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return this
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.callDomain(currentDomain, this.syntax.domains[currentDomain])
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.argv("proxy", req, res);
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}
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return fetchProxy(req, res, reverseTo);
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});
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const server = !this.syntax.encryption ? this.app : https.createServer({
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cert : fs.readFileSync(this.syntax.encryption.public, 'utf-8'),
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key : fs.readFileSync(this.syntax.encryption.private, 'utf-8')
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}, this.app);
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server.listen(this.adr.port, address, (err) => {
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if (err) {
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throw err;
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}
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console.log(`HTTP reverse proxy server listened at ${
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address
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}:${this.adr.port}`);
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})
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}
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};
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