1 import express from "express";
3 import { IncomingHttpHeaders } from "http";
4 import { Helmet } from "inferno-helmet";
5 import { matchPath, StaticRouter } from "inferno-router";
6 import { renderToString } from "inferno-server";
7 import IsomorphicCookie from "isomorphic-cookie";
8 import { GetSite, GetSiteResponse, LemmyHttp } from "lemmy-js-client";
9 import path from "path";
10 import process from "process";
11 import serialize from "serialize-javascript";
12 import { App } from "../shared/components/app/app";
13 import { SYMBOLS } from "../shared/components/common/symbols";
14 import { httpBaseInternal } from "../shared/env";
19 } from "../shared/interfaces";
20 import { routes } from "../shared/routes";
21 import { initializeSite, setOptionalAuth } from "../shared/utils";
23 const server = express();
24 const [hostname, port] = process.env["LEMMY_UI_HOST"]
25 ? process.env["LEMMY_UI_HOST"].split(":")
26 : ["0.0.0.0", "1234"];
27 const extraThemesFolder =
28 process.env["LEMMY_UI_EXTRA_THEMES_FOLDER"] || "./extra_themes";
30 server.use(express.json());
31 server.use(express.urlencoded({ extended: false }));
32 server.use("/static", express.static(path.resolve("./dist")));
34 const robotstxt = `User-Agent: *
37 Disallow: /create_community
38 Disallow: /create_post
39 Disallow: /create_private_message
43 Disallow: /password_change
47 server.get("/robots.txt", async (_req, res) => {
48 res.setHeader("content-type", "text/plain; charset=utf-8");
52 server.get("/css/themes/:name", async (req, res) => {
53 res.contentType("text/css");
54 const theme = req.params.name;
55 if (!theme.endsWith(".css")) {
56 res.send("Theme must be a css file");
59 const customTheme = path.resolve(`./${extraThemesFolder}/${theme}`);
60 if (fs.existsSync(customTheme)) {
61 res.sendFile(customTheme);
63 const internalTheme = path.resolve(`./dist/assets/css/themes/${theme}`);
64 res.sendFile(internalTheme);
68 function buildThemeList(): string[] {
85 if (fs.existsSync(extraThemesFolder)) {
86 let dirThemes = fs.readdirSync(extraThemesFolder);
87 let cssThemes = dirThemes
88 .filter(d => d.endsWith(".css"))
89 .map(d => d.replace(".css", ""));
90 themes.push(...cssThemes);
95 server.get("/css/themelist", async (_req, res) => {
97 res.send(JSON.stringify(buildThemeList()));
100 // server.use(cookieParser());
101 server.get("/*", async (req, res) => {
103 const activeRoute = routes.find(route => matchPath(req.path, route)) || {};
104 const context = {} as any;
105 let auth: string = IsomorphicCookie.load("jwt", req);
107 let getSiteForm: GetSite = {};
108 setOptionalAuth(getSiteForm, auth);
110 let promises: Promise<any>[] = [];
112 let headers = setForwardedHeaders(req.headers);
114 let initialFetchReq: InitialFetchRequest = {
115 client: new LemmyHttp(httpBaseInternal, headers),
120 // Get site data first
121 // This bypasses errors, so that the client can hit the error on its own,
122 // in order to remove the jwt on the browser. Necessary for wrong jwts
123 let try_site: any = await initialFetchReq.client.getSite(getSiteForm);
124 if (try_site.error == "not_logged_in") {
126 "Incorrect JWT token, skipping auth so frontend can remove jwt cookie"
128 delete getSiteForm.auth;
129 delete initialFetchReq.auth;
130 try_site = await initialFetchReq.client.getSite(getSiteForm);
132 let site: GetSiteResponse = try_site;
133 initializeSite(site);
135 if (activeRoute.fetchInitialData) {
136 promises.push(...activeRoute.fetchInitialData(initialFetchReq));
139 let routeData = await Promise.all(promises);
141 // Redirect to the 404 if there's an API error
142 if (routeData[0] && routeData[0].error) {
143 let errCode = routeData[0].error;
144 console.error(errCode);
145 if (errCode == "instance_is_private") {
146 return res.redirect(`/signup`);
148 return res.send(`404: ${errCode}`);
152 let isoData: IsoData = {
159 <StaticRouter location={req.url} context={isoData}>
160 <App siteRes={isoData.site_res} />
164 return res.redirect(context.url);
169 http-equiv="Content-Security-Policy"
170 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'"
174 const root = renderToString(wrapper);
175 const symbols = renderToString(SYMBOLS);
176 const cspStr = process.env.LEMMY_EXTERNAL_HOST
177 ? renderToString(cspHtml)
179 const helmet = Helmet.renderStatic();
181 const config: ILemmyConfig = { wsHost: process.env.LEMMY_WS_HOST };
185 <html ${helmet.htmlAttributes.toString()} lang="en">
187 <script>window.isoData = ${serialize(isoData)}</script>
188 <script>window.lemmyConfig = ${serialize(config)}</script>
190 <!-- A remote debugging utility for mobile
191 <script src="//cdn.jsdelivr.net/npm/eruda"></script>
192 <script>eruda.init();</script>
195 ${helmet.title.toString()}
196 ${helmet.meta.toString()}
198 <!-- Required meta tags -->
199 <meta name="Description" content="Lemmy">
200 <meta charset="utf-8">
201 <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
203 <!-- Content Security Policy -->
206 <!-- Web app manifest -->
207 <link rel="manifest" href="/static/assets/manifest.webmanifest">
210 <link rel="stylesheet" type="text/css" href="/static/styles/styles.css" />
212 <!-- Current theme and more -->
213 ${helmet.link.toString()}
220 <body ${helmet.bodyAttributes.toString()}>
222 <div class="alert alert-danger rounded-0" role="alert">
223 <b>Javascript is disabled. Actions will not work.</b>
227 <div id='root'>${root}</div>
228 <script defer src='/static/js/client.js'></script>
234 return res.send(`404: ${err}`);
238 server.listen(Number(port), hostname, () => {
239 console.log(`http://${hostname}:${port}`);
242 function setForwardedHeaders(headers: IncomingHttpHeaders): {
243 [key: string]: string;
248 if (headers["x-real-ip"]) {
249 out["x-real-ip"] = headers["x-real-ip"];
251 if (headers["x-forwarded-for"]) {
252 out["x-forwarded-for"] = headers["x-forwarded-for"];
258 process.on("SIGINT", () => {
259 console.info("Interrupted");