2021-02-22 02:39:04 +00:00
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import express from "express";
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2021-07-17 20:42:55 +00:00
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import { IncomingHttpHeaders } from "http";
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import { Helmet } from "inferno-helmet";
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import { matchPath, StaticRouter } from "inferno-router";
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2021-02-22 02:39:04 +00:00
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import { renderToString } from "inferno-server";
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2021-07-17 20:42:55 +00:00
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import IsomorphicCookie from "isomorphic-cookie";
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import { GetSite, GetSiteResponse, LemmyHttp } from "lemmy-js-client";
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2021-02-22 02:39:04 +00:00
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import path from "path";
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2021-07-17 20:42:55 +00:00
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import process from "process";
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import serialize from "serialize-javascript";
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import { App } from "../shared/components/app/app";
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import { SYMBOLS } from "../shared/components/common/symbols";
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import { httpBaseInternal } from "../shared/env";
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2021-02-12 17:54:35 +00:00
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import {
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ILemmyConfig,
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InitialFetchRequest,
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IsoData,
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2021-02-22 02:39:04 +00:00
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} from "../shared/interfaces";
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import { routes } from "../shared/routes";
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2021-07-17 20:42:55 +00:00
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import { initializeSite, setOptionalAuth } from "../shared/utils";
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2020-09-10 16:39:01 +00:00
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2020-08-23 04:04:58 +00:00
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const server = express();
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2021-03-30 01:46:42 +00:00
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const [hostname, port] = process.env["LEMMY_UI_HOST"]
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? process.env["LEMMY_UI_HOST"].split(":")
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2021-03-30 01:17:19 +00:00
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: ["0.0.0.0", "1234"];
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2020-08-23 04:04:58 +00:00
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server.use(express.json());
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server.use(express.urlencoded({ extended: false }));
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2021-02-22 02:39:04 +00:00
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server.use("/static", express.static(path.resolve("./dist")));
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2020-08-23 04:04:58 +00:00
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2021-09-06 14:25:48 +00:00
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const robotstxt = `User-Agent: *
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2021-09-05 22:34:40 +00:00
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Disallow: /login
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Disallow: /settings
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Disallow: /create_community
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Disallow: /create_post
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2021-09-06 14:25:48 +00:00
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Disallow: /create_private_message
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2021-09-05 22:34:40 +00:00
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Disallow: /inbox
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2021-09-06 14:25:48 +00:00
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Disallow: /setup
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Disallow: /admin
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Disallow: /password_change
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2021-09-05 22:34:40 +00:00
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Disallow: /search/
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`;
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2021-09-06 14:25:48 +00:00
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server.get("/robots.txt", async (_req, res) => {
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res.setHeader("content-type", "text/plain; charset=utf-8");
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res.send(robotstxt);
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2021-09-05 22:34:40 +00:00
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});
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2020-08-23 04:04:58 +00:00
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2021-09-06 14:25:48 +00:00
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// server.use(cookieParser());
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2021-02-22 02:39:04 +00:00
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server.get("/*", async (req, res) => {
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2021-11-17 21:23:46 +00:00
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try {
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const activeRoute = routes.find(route => matchPath(req.path, route)) || {};
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const context = {} as any;
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let auth: string = IsomorphicCookie.load("jwt", req);
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let getSiteForm: GetSite = {};
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setOptionalAuth(getSiteForm, auth);
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let promises: Promise<any>[] = [];
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let headers = setForwardedHeaders(req.headers);
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let initialFetchReq: InitialFetchRequest = {
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client: new LemmyHttp(httpBaseInternal, headers),
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auth,
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path: req.path,
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};
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// Get site data first
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// This bypasses errors, so that the client can hit the error on its own,
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// in order to remove the jwt on the browser. Necessary for wrong jwts
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let try_site: any = await initialFetchReq.client.getSite(getSiteForm);
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if (try_site.error == "not_logged_in") {
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console.error(
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"Incorrect JWT token, skipping auth so frontend can remove jwt cookie"
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);
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delete getSiteForm.auth;
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delete initialFetchReq.auth;
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try_site = await initialFetchReq.client.getSite(getSiteForm);
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}
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let site: GetSiteResponse = try_site;
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initializeSite(site);
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if (activeRoute.fetchInitialData) {
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promises.push(...activeRoute.fetchInitialData(initialFetchReq));
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}
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let routeData = await Promise.all(promises);
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// Redirect to the 404 if there's an API error
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if (routeData[0] && routeData[0].error) {
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let errCode = routeData[0].error;
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2021-12-02 16:46:32 +00:00
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console.error(errCode);
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2021-11-17 21:23:46 +00:00
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return res.redirect(`/404?err=${errCode}`);
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}
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let isoData: IsoData = {
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path: req.path,
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site_res: site,
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routeData,
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};
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const wrapper = (
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<StaticRouter location={req.url} context={isoData}>
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<App siteRes={isoData.site_res} />
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</StaticRouter>
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);
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if (context.url) {
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return res.redirect(context.url);
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}
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const cspHtml = (
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<meta
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http-equiv="Content-Security-Policy"
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content="default-src data: 'self'; connect-src * ws: wss:; frame-src *; img-src * data:; script-src 'self'; style-src 'self' 'unsafe-inline'; manifest-src 'self'"
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/>
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2021-03-15 20:54:17 +00:00
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);
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2020-11-25 20:06:38 +00:00
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2021-11-17 21:23:46 +00:00
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const root = renderToString(wrapper);
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const symbols = renderToString(SYMBOLS);
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const cspStr = process.env.LEMMY_EXTERNAL_HOST
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? renderToString(cspHtml)
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: "";
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const helmet = Helmet.renderStatic();
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2020-09-11 04:03:01 +00:00
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2021-11-17 21:23:46 +00:00
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const config: ILemmyConfig = { wsHost: process.env.LEMMY_WS_HOST };
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2021-02-12 17:54:35 +00:00
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2021-11-17 21:23:46 +00:00
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res.send(`
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2020-09-06 16:15:25 +00:00
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<!DOCTYPE html>
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2020-09-11 04:03:01 +00:00
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<html ${helmet.htmlAttributes.toString()} lang="en">
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2020-09-06 16:15:25 +00:00
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<head>
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2020-10-26 14:22:14 +00:00
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<script>window.isoData = ${serialize(isoData)}</script>
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2021-02-12 17:54:35 +00:00
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<script>window.lemmyConfig = ${serialize(config)}</script>
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2020-09-06 16:15:25 +00:00
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2021-07-18 15:08:24 +00:00
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<!-- A remote debugging utility for mobile
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<script src="//cdn.jsdelivr.net/npm/eruda"></script>
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<script>eruda.init();</script>
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-->
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2020-09-11 04:03:01 +00:00
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${helmet.title.toString()}
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${helmet.meta.toString()}
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2020-09-06 16:15:25 +00:00
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<!-- Required meta tags -->
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<meta name="Description" content="Lemmy">
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
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2020-11-23 17:41:57 +00:00
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<!-- Content Security Policy -->
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2020-11-25 20:06:38 +00:00
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${cspStr}
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2020-11-23 17:41:57 +00:00
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2020-09-10 02:38:57 +00:00
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<!-- Web app manifest -->
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2020-09-10 16:39:01 +00:00
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<link rel="manifest" href="/static/assets/manifest.webmanifest">
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2020-09-10 02:38:57 +00:00
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2020-09-06 16:15:25 +00:00
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<!-- Styles -->
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2020-09-07 03:41:46 +00:00
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<link rel="stylesheet" type="text/css" href="/static/styles/styles.css" />
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2020-10-26 14:28:17 +00:00
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<!-- Current theme and more -->
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${helmet.link.toString()}
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2021-07-16 16:51:54 +00:00
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<!-- Icons -->
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${symbols}
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2020-09-06 16:15:25 +00:00
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</head>
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2020-09-11 04:03:01 +00:00
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<body ${helmet.bodyAttributes.toString()}>
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2020-09-09 20:33:40 +00:00
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<noscript>
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2020-09-14 15:26:24 +00:00
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<div class="alert alert-danger rounded-0" role="alert">
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2020-09-15 13:20:19 +00:00
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<b>Javascript is disabled. Actions will not work.</b>
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2020-09-14 15:26:24 +00:00
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</div>
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2020-09-09 20:33:40 +00:00
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</noscript>
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2020-10-26 07:09:44 +00:00
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2020-09-11 04:03:01 +00:00
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<div id='root'>${root}</div>
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2020-09-24 22:03:03 +00:00
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<script defer src='/static/js/client.js'></script>
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2020-09-06 16:15:25 +00:00
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</body>
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</html>
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2020-08-23 04:04:58 +00:00
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`);
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2021-11-17 21:23:46 +00:00
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} catch (err) {
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2021-12-02 16:46:32 +00:00
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console.error(err);
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return res.redirect(`/404?err=${err}`);
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2021-11-17 21:23:46 +00:00
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}
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2020-08-23 04:04:58 +00:00
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});
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2020-11-12 21:56:46 +00:00
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2021-03-29 15:35:32 +00:00
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server.listen(Number(port), hostname, () => {
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console.log(`http://${hostname}:${port}`);
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2020-08-23 04:04:58 +00:00
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});
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2021-07-16 18:29:22 +00:00
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function setForwardedHeaders(headers: IncomingHttpHeaders): {
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[key: string]: string;
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} {
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2020-11-12 21:56:46 +00:00
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let out = {
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host: headers.host,
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};
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2021-02-22 02:39:04 +00:00
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if (headers["x-real-ip"]) {
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out["x-real-ip"] = headers["x-real-ip"];
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2020-11-12 21:56:46 +00:00
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}
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2021-02-22 02:39:04 +00:00
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if (headers["x-forwarded-for"]) {
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out["x-forwarded-for"] = headers["x-forwarded-for"];
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2020-11-12 21:56:46 +00:00
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}
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return out;
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2020-08-23 04:04:58 +00:00
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}
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2020-09-10 16:39:01 +00:00
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2021-02-22 02:39:04 +00:00
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process.on("SIGINT", () => {
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console.info("Interrupted");
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2020-09-10 16:39:01 +00:00
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process.exit(0);
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});
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