1 import express from "express";
2 import { IncomingHttpHeaders } from "http";
3 import { Helmet } from "inferno-helmet";
4 import { matchPath, StaticRouter } from "inferno-router";
5 import { renderToString } from "inferno-server";
6 import IsomorphicCookie from "isomorphic-cookie";
7 import { GetSite, GetSiteResponse, LemmyHttp } from "lemmy-js-client";
8 import path from "path";
9 import process from "process";
10 import serialize from "serialize-javascript";
11 import { App } from "../shared/components/app/app";
12 import { SYMBOLS } from "../shared/components/common/symbols";
13 import { httpBaseInternal } from "../shared/env";
18 } from "../shared/interfaces";
19 import { routes } from "../shared/routes";
20 import { initializeSite, setOptionalAuth } from "../shared/utils";
22 const server = express();
23 const [hostname, port] = process.env["LEMMY_UI_HOST"]
24 ? process.env["LEMMY_UI_HOST"].split(":")
25 : ["0.0.0.0", "1234"];
27 server.use(express.json());
28 server.use(express.urlencoded({ extended: false }));
29 server.use("/static", express.static(path.resolve("./dist")));
31 // server.use(cookieParser());
33 server.get("/*", async (req, res) => {
34 const activeRoute = routes.find(route => matchPath(req.path, route)) || {};
35 const context = {} as any;
36 let auth: string = IsomorphicCookie.load("jwt", req);
38 let getSiteForm: GetSite = {};
39 setOptionalAuth(getSiteForm, auth);
41 let promises: Promise<any>[] = [];
43 let headers = setForwardedHeaders(req.headers);
45 let initialFetchReq: InitialFetchRequest = {
46 client: new LemmyHttp(httpBaseInternal, headers),
51 // Get site data first
52 // This bypasses errors, so that the client can hit the error on its own,
53 // in order to remove the jwt on the browser. Necessary for wrong jwts
54 let try_site: any = await initialFetchReq.client.getSite(getSiteForm);
55 if (try_site.error == "not_logged_in") {
57 "Incorrect JWT token, skipping auth so frontend can remove jwt cookie"
59 delete getSiteForm.auth;
60 delete initialFetchReq.auth;
61 try_site = await initialFetchReq.client.getSite(getSiteForm);
63 let site: GetSiteResponse = try_site;
66 if (activeRoute.fetchInitialData) {
67 promises.push(...activeRoute.fetchInitialData(initialFetchReq));
70 let routeData = await Promise.all(promises);
72 // Redirect to the 404 if there's an API error
73 if (routeData[0] && routeData[0].error) {
74 let errCode = routeData[0].error;
75 return res.redirect(`/404?err=${errCode}`);
78 let isoData: IsoData = {
85 <StaticRouter location={req.url} context={isoData}>
86 <App siteRes={isoData.site_res} />
90 return res.redirect(context.url);
95 http-equiv="Content-Security-Policy"
96 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'"
100 const root = renderToString(wrapper);
101 const symbols = renderToString(SYMBOLS);
102 const cspStr = process.env.LEMMY_EXTERNAL_HOST ? renderToString(cspHtml) : "";
103 const helmet = Helmet.renderStatic();
105 const config: ILemmyConfig = { wsHost: process.env.LEMMY_WS_HOST };
109 <html ${helmet.htmlAttributes.toString()} lang="en">
111 <script>window.isoData = ${serialize(isoData)}</script>
112 <script>window.lemmyConfig = ${serialize(config)}</script>
114 <!-- A remote debugging utility for mobile
115 <script src="//cdn.jsdelivr.net/npm/eruda"></script>
116 <script>eruda.init();</script>
119 ${helmet.title.toString()}
120 ${helmet.meta.toString()}
122 <!-- Required meta tags -->
123 <meta name="Description" content="Lemmy">
124 <meta charset="utf-8">
125 <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
127 <!-- Content Security Policy -->
130 <!-- Web app manifest -->
131 <link rel="manifest" href="/static/assets/manifest.webmanifest">
134 <link rel="stylesheet" type="text/css" href="/static/styles/styles.css" />
136 <!-- Current theme and more -->
137 ${helmet.link.toString()}
144 <body ${helmet.bodyAttributes.toString()}>
146 <div class="alert alert-danger rounded-0" role="alert">
147 <b>Javascript is disabled. Actions will not work.</b>
151 <div id='root'>${root}</div>
152 <script defer src='/static/js/client.js'></script>
158 server.listen(Number(port), hostname, () => {
159 console.log(`http://${hostname}:${port}`);
162 function setForwardedHeaders(headers: IncomingHttpHeaders): {
163 [key: string]: string;
168 if (headers["x-real-ip"]) {
169 out["x-real-ip"] = headers["x-real-ip"];
171 if (headers["x-forwarded-for"]) {
172 out["x-forwarded-for"] = headers["x-forwarded-for"];
178 process.on("SIGINT", () => {
179 console.info("Interrupted");