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 { httpBaseInternal } from "../shared/env";
18 } from "../shared/interfaces";
19 import { routes } from "../shared/routes";
20 import { initializeSite } 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"];
26 const extraThemesFolder =
27 process.env["LEMMY_UI_EXTRA_THEMES_FOLDER"] || "./extra_themes";
29 if (!process.env["LEMMY_UI_DISABLE_CSP"] && !process.env["LEMMY_UI_DEBUG"]) {
30 server.use(function (_req, res, next) {
32 "Content-Security-Policy",
33 `default-src 'self'; manifest-src *; connect-src *; img-src * data:; script-src 'self' 'unsafe-inline' 'unsafe-eval'; style-src 'self' 'unsafe-inline'; form-action 'self'; base-uri 'self'; frame-src *`
38 const customHtmlHeader = process.env["LEMMY_UI_CUSTOM_HTML_HEADER"] || "";
40 server.use(express.json());
41 server.use(express.urlencoded({ extended: false }));
42 server.use("/static", express.static(path.resolve("./dist")));
44 const robotstxt = `User-Agent: *
47 Disallow: /create_community
48 Disallow: /create_post
49 Disallow: /create_private_message
53 Disallow: /password_change
57 server.get("/robots.txt", async (_req, res) => {
58 res.setHeader("content-type", "text/plain; charset=utf-8");
62 server.get("/css/themes/:name", async (req, res) => {
63 res.contentType("text/css");
64 const theme = req.params.name;
65 if (!theme.endsWith(".css")) {
66 res.send("Theme must be a css file");
69 const customTheme = path.resolve(`./${extraThemesFolder}/${theme}`);
70 if (fs.existsSync(customTheme)) {
71 res.sendFile(customTheme);
73 const internalTheme = path.resolve(`./dist/assets/css/themes/${theme}`);
75 // If the theme doesn't exist, just send litely
76 if (fs.existsSync(internalTheme)) {
77 res.sendFile(internalTheme);
79 res.sendFile(path.resolve("./dist/assets/css/themes/litely.css"));
84 function buildThemeList(): string[] {
85 let themes = ["darkly", "darkly-red", "litely", "litely-red"];
86 if (fs.existsSync(extraThemesFolder)) {
87 let dirThemes = fs.readdirSync(extraThemesFolder);
88 let cssThemes = dirThemes
89 .filter(d => d.endsWith(".css"))
90 .map(d => d.replace(".css", ""));
91 themes.push(...cssThemes);
96 server.get("/css/themelist", async (_req, res) => {
98 res.send(JSON.stringify(buildThemeList()));
101 // server.use(cookieParser());
102 server.get("/*", async (req, res) => {
104 const activeRoute = routes.find(route => matchPath(req.path, route));
105 const context = {} as any;
106 let auth: string | undefined = IsomorphicCookie.load("jwt", req);
108 const getSiteForm: GetSite = { auth };
110 const promises: Promise<any>[] = [];
112 const headers = setForwardedHeaders(req.headers);
113 const client = new LemmyHttp(httpBaseInternal, headers);
115 // Get site data first
116 // This bypasses errors, so that the client can hit the error on its own,
117 // in order to remove the jwt on the browser. Necessary for wrong jwts
118 let try_site: any = await client.getSite(getSiteForm);
119 if (try_site.error == "not_logged_in") {
121 "Incorrect JWT token, skipping auth so frontend can remove jwt cookie"
123 getSiteForm.auth = undefined;
125 try_site = await client.getSite(getSiteForm);
127 const site: GetSiteResponse = try_site;
128 initializeSite(site);
130 const initialFetchReq: InitialFetchRequest = {
138 if (activeRoute?.fetchInitialData) {
139 promises.push(...activeRoute.fetchInitialData(initialFetchReq));
142 const routeData = await Promise.all(promises);
144 // Redirect to the 404 if there's an API error
145 if (routeData[0] && routeData[0].error) {
146 const error = routeData[0].error;
147 console.error(error);
148 if (error === "instance_is_private") {
149 return res.redirect(`/signup`);
151 return res.send(`404: ${removeAuthParam(error)}`);
155 const isoData: IsoData = {
162 <StaticRouter location={req.url} context={isoData}>
167 return res.redirect(context.url);
172 <script src="//cdn.jsdelivr.net/npm/eruda"></script>
173 <script>eruda.init();</script>
177 const erudaStr = process.env["LEMMY_UI_DEBUG"] ? renderToString(eruda) : "";
178 const root = renderToString(wrapper);
179 const helmet = Helmet.renderStatic();
181 const config: ILemmyConfig = { wsHost: process.env.LEMMY_UI_LEMMY_WS_HOST };
185 <html ${helmet.htmlAttributes.toString()} lang="en">
187 <script>window.isoData = ${JSON.stringify(isoData)}</script>
188 <script>window.lemmyConfig = ${serialize(config)}</script>
190 <!-- A remote debugging utility for mobile -->
193 <!-- Custom injected script -->
196 ${helmet.title.toString()}
197 ${helmet.meta.toString()}
199 <!-- Required meta tags -->
200 <meta name="Description" content="Lemmy">
201 <meta charset="utf-8">
202 <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
204 <!-- Web app manifest -->
205 <link rel="manifest" href="/static/assets/manifest.webmanifest">
208 <link rel="stylesheet" type="text/css" href="/static/styles/styles.css" />
210 <!-- Current theme and more -->
211 ${helmet.link.toString()}
215 <body ${helmet.bodyAttributes.toString()}>
217 <div class="alert alert-danger rounded-0" role="alert">
218 <b>Javascript is disabled. Actions will not work.</b>
222 <div id='root'>${root}</div>
223 <script defer src='/static/js/client.js'></script>
229 return res.send(`404: ${removeAuthParam(err)}`);
233 server.listen(Number(port), hostname, () => {
234 console.log(`http://${hostname}:${port}`);
237 function setForwardedHeaders(headers: IncomingHttpHeaders): {
238 [key: string]: string;
240 let out: { [key: string]: string } = {};
242 out.host = headers.host;
244 let realIp = headers["x-real-ip"];
246 out["x-real-ip"] = realIp as string;
248 let forwardedFor = headers["x-forwarded-for"];
250 out["x-forwarded-for"] = forwardedFor as string;
256 process.on("SIGINT", () => {
257 console.info("Interrupted");
261 function removeAuthParam(err: any): string {
262 return removeParam(err.toString(), "auth");
265 function removeParam(url: string, parameter: string): string {
267 .replace(new RegExp("[?&]" + parameter + "=[^&#]*(#.*)?$"), "$1")
268 .replace(new RegExp("([?&])" + parameter + "=[^&]*&"), "$1");