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[] {
87 if (fs.existsSync(extraThemesFolder)) {
88 let dirThemes = fs.readdirSync(extraThemesFolder);
89 let cssThemes = dirThemes
90 .filter(d => d.endsWith(".css"))
91 .map(d => d.replace(".css", ""));
92 themes.push(...cssThemes);
97 server.get("/css/themelist", async (_req, res) => {
99 res.send(JSON.stringify(buildThemeList()));
102 // server.use(cookieParser());
103 server.get("/*", async (req, res) => {
105 const activeRoute = routes.find(route => matchPath(req.path, route)) || {};
106 const context = {} as any;
107 let auth: string = IsomorphicCookie.load("jwt", req);
109 let getSiteForm: GetSite = {};
110 setOptionalAuth(getSiteForm, auth);
112 let promises: Promise<any>[] = [];
114 let headers = setForwardedHeaders(req.headers);
116 let initialFetchReq: InitialFetchRequest = {
117 client: new LemmyHttp(httpBaseInternal, headers),
122 // Get site data first
123 // This bypasses errors, so that the client can hit the error on its own,
124 // in order to remove the jwt on the browser. Necessary for wrong jwts
125 let try_site: any = await initialFetchReq.client.getSite(getSiteForm);
126 if (try_site.error == "not_logged_in") {
128 "Incorrect JWT token, skipping auth so frontend can remove jwt cookie"
130 delete getSiteForm.auth;
131 delete initialFetchReq.auth;
132 try_site = await initialFetchReq.client.getSite(getSiteForm);
134 let site: GetSiteResponse = try_site;
135 initializeSite(site);
137 if (activeRoute.fetchInitialData) {
138 promises.push(...activeRoute.fetchInitialData(initialFetchReq));
141 let routeData = await Promise.all(promises);
143 // Redirect to the 404 if there's an API error
144 if (routeData[0] && routeData[0].error) {
145 let errCode = routeData[0].error;
146 console.error(errCode);
147 if (errCode == "instance_is_private") {
148 return res.redirect(`/signup`);
150 return res.send(`404: ${removeAuthParam(errCode)}`);
154 let isoData: IsoData = {
161 <StaticRouter location={req.url} context={isoData}>
162 <App siteRes={isoData.site_res} />
166 return res.redirect(context.url);
171 http-equiv="Content-Security-Policy"
172 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'"
178 <script src="//cdn.jsdelivr.net/npm/eruda"></script>
179 <script>eruda.init();</script>
182 const erudaStr = process.env["LEMMY_UI_DEBUG"] ? renderToString(eruda) : "";
184 const root = renderToString(wrapper);
185 const symbols = renderToString(SYMBOLS);
186 const cspStr = process.env.LEMMY_EXTERNAL_HOST
187 ? renderToString(cspHtml)
189 const helmet = Helmet.renderStatic();
191 const config: ILemmyConfig = { wsHost: process.env.LEMMY_WS_HOST };
195 <html ${helmet.htmlAttributes.toString()} lang="en">
197 <script>window.isoData = ${serialize(isoData)}</script>
198 <script>window.lemmyConfig = ${serialize(config)}</script>
200 <!-- A remote debugging utility for mobile -->
203 ${helmet.title.toString()}
204 ${helmet.meta.toString()}
206 <!-- Required meta tags -->
207 <meta name="Description" content="Lemmy">
208 <meta charset="utf-8">
209 <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
211 <!-- Content Security Policy -->
214 <!-- Web app manifest -->
215 <link rel="manifest" href="/static/assets/manifest.webmanifest">
218 <link rel="stylesheet" type="text/css" href="/static/styles/styles.css" />
220 <!-- Current theme and more -->
221 ${helmet.link.toString()}
228 <body ${helmet.bodyAttributes.toString()}>
230 <div class="alert alert-danger rounded-0" role="alert">
231 <b>Javascript is disabled. Actions will not work.</b>
235 <div id='root'>${root}</div>
236 <script defer src='/static/js/client.js'></script>
242 return res.send(`404: ${removeAuthParam(err)}`);
246 server.listen(Number(port), hostname, () => {
247 console.log(`http://${hostname}:${port}`);
250 function setForwardedHeaders(headers: IncomingHttpHeaders): {
251 [key: string]: string;
256 if (headers["x-real-ip"]) {
257 out["x-real-ip"] = headers["x-real-ip"];
259 if (headers["x-forwarded-for"]) {
260 out["x-forwarded-for"] = headers["x-forwarded-for"];
266 process.on("SIGINT", () => {
267 console.info("Interrupted");
271 function removeAuthParam(err: any): string {
272 return removeParam(err.toString(), "auth");
275 function removeParam(url: string, parameter: string): string {
277 .replace(new RegExp("[?&]" + parameter + "=[^&#]*(#.*)?$"), "$1")
278 .replace(new RegExp("([?&])" + parameter + "=[^&]*&"), "$1");