1 import { None, Option } from "@sniptt/monads";
2 import { serialize as serializeO } from "class-transformer";
3 import express from "express";
5 import { IncomingHttpHeaders } from "http";
6 import { Helmet } from "inferno-helmet";
7 import { matchPath, StaticRouter } from "inferno-router";
8 import { renderToString } from "inferno-server";
9 import IsomorphicCookie from "isomorphic-cookie";
10 import { GetSite, GetSiteResponse, LemmyHttp, toOption } from "lemmy-js-client";
11 import path from "path";
12 import process from "process";
13 import serialize from "serialize-javascript";
14 import { App } from "../shared/components/app/app";
15 import { httpBaseInternal } from "../shared/env";
20 } from "../shared/interfaces";
21 import { routes } from "../shared/routes";
22 import { initializeSite } from "../shared/utils";
24 const server = express();
25 const [hostname, port] = process.env["LEMMY_UI_HOST"]
26 ? process.env["LEMMY_UI_HOST"].split(":")
27 : ["0.0.0.0", "1234"];
28 const extraThemesFolder =
29 process.env["LEMMY_UI_EXTRA_THEMES_FOLDER"] || "./extra_themes";
31 if (!process.env["LEMMY_UI_DISABLE_CSP"] && !process.env["LEMMY_UI_DEBUG"]) {
32 server.use(function (_req, res, next) {
34 "Content-Security-Policy",
35 `default-src 'none'; 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 *`
40 const customHtmlHeader = process.env["LEMMY_UI_CUSTOM_HTML_HEADER"] || "";
42 server.use(express.json());
43 server.use(express.urlencoded({ extended: false }));
44 server.use("/static", express.static(path.resolve("./dist")));
46 const robotstxt = `User-Agent: *
49 Disallow: /create_community
50 Disallow: /create_post
51 Disallow: /create_private_message
55 Disallow: /password_change
59 server.get("/robots.txt", async (_req, res) => {
60 res.setHeader("content-type", "text/plain; charset=utf-8");
64 server.get("/css/themes/:name", async (req, res) => {
65 res.contentType("text/css");
66 const theme = req.params.name;
67 if (!theme.endsWith(".css")) {
68 res.send("Theme must be a css file");
71 const customTheme = path.resolve(`./${extraThemesFolder}/${theme}`);
72 if (fs.existsSync(customTheme)) {
73 res.sendFile(customTheme);
75 const internalTheme = path.resolve(`./dist/assets/css/themes/${theme}`);
76 res.sendFile(internalTheme);
80 function buildThemeList(): string[] {
99 if (fs.existsSync(extraThemesFolder)) {
100 let dirThemes = fs.readdirSync(extraThemesFolder);
101 let cssThemes = dirThemes
102 .filter(d => d.endsWith(".css"))
103 .map(d => d.replace(".css", ""));
104 themes.push(...cssThemes);
109 server.get("/css/themelist", async (_req, res) => {
111 res.send(JSON.stringify(buildThemeList()));
114 // server.use(cookieParser());
115 server.get("/*", async (req, res) => {
117 const activeRoute = routes.find(route => matchPath(req.path, route)) || {};
118 const context = {} as any;
119 let auth: Option<string> = toOption(IsomorphicCookie.load("jwt", req));
121 let getSiteForm = new GetSite({ auth });
123 let promises: Promise<any>[] = [];
125 let headers = setForwardedHeaders(req.headers);
127 let initialFetchReq: InitialFetchRequest = {
128 client: new LemmyHttp(httpBaseInternal, headers),
133 // Get site data first
134 // This bypasses errors, so that the client can hit the error on its own,
135 // in order to remove the jwt on the browser. Necessary for wrong jwts
136 let try_site: any = await initialFetchReq.client.getSite(getSiteForm);
137 if (try_site.error == "not_logged_in") {
139 "Incorrect JWT token, skipping auth so frontend can remove jwt cookie"
141 getSiteForm.auth = None;
142 initialFetchReq.auth = None;
143 try_site = await initialFetchReq.client.getSite(getSiteForm);
145 let site: GetSiteResponse = try_site;
146 initializeSite(site);
148 if (activeRoute.fetchInitialData) {
149 promises.push(...activeRoute.fetchInitialData(initialFetchReq));
152 let routeData = await Promise.all(promises);
154 // Redirect to the 404 if there's an API error
155 if (routeData[0] && routeData[0].error) {
156 let errCode = routeData[0].error;
157 console.error(errCode);
158 if (errCode == "instance_is_private") {
159 return res.redirect(`/signup`);
161 return res.send(`404: ${removeAuthParam(errCode)}`);
165 let isoData: IsoData = {
172 <StaticRouter location={req.url} context={isoData}>
177 return res.redirect(context.url);
182 <script src="//cdn.jsdelivr.net/npm/eruda"></script>
183 <script>eruda.init();</script>
186 const erudaStr = process.env["LEMMY_UI_DEBUG"] ? renderToString(eruda) : "";
187 const root = renderToString(wrapper);
188 const helmet = Helmet.renderStatic();
190 const config: ILemmyConfig = { wsHost: process.env.LEMMY_UI_LEMMY_WS_HOST };
194 <html ${helmet.htmlAttributes.toString()} lang="en">
196 <script>window.isoData = ${serializeO(isoData)}</script>
197 <script>window.lemmyConfig = ${serialize(config)}</script>
199 <!-- A remote debugging utility for mobile -->
202 <!-- Custom injected script -->
205 ${helmet.title.toString()}
206 ${helmet.meta.toString()}
208 <!-- Required meta tags -->
209 <meta name="Description" content="Lemmy">
210 <meta charset="utf-8">
211 <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
213 <!-- Web app manifest -->
214 <link rel="manifest" href="/static/assets/manifest.webmanifest">
217 <link rel="stylesheet" type="text/css" href="/static/styles/styles.css" />
219 <!-- Current theme and more -->
220 ${helmet.link.toString()}
224 <body ${helmet.bodyAttributes.toString()}>
226 <div class="alert alert-danger rounded-0" role="alert">
227 <b>Javascript is disabled. Actions will not work.</b>
231 <div id='root'>${root}</div>
232 <script defer src='/static/js/client.js'></script>
238 return res.send(`404: ${removeAuthParam(err)}`);
242 server.listen(Number(port), hostname, () => {
243 console.log(`http://${hostname}:${port}`);
246 function setForwardedHeaders(headers: IncomingHttpHeaders): {
247 [key: string]: string;
252 if (headers["x-real-ip"]) {
253 out["x-real-ip"] = headers["x-real-ip"];
255 if (headers["x-forwarded-for"]) {
256 out["x-forwarded-for"] = headers["x-forwarded-for"];
262 process.on("SIGINT", () => {
263 console.info("Interrupted");
267 function removeAuthParam(err: any): string {
268 return removeParam(err.toString(), "auth");
271 function removeParam(url: string, parameter: string): string {
273 .replace(new RegExp("[?&]" + parameter + "=[^&#]*(#.*)?$"), "$1")
274 .replace(new RegExp("([?&])" + parameter + "=[^&]*&"), "$1");