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 { SYMBOLS } from "../shared/components/common/symbols";
16 import { httpBaseInternal } from "../shared/env";
21 } from "../shared/interfaces";
22 import { routes } from "../shared/routes";
23 import { initializeSite } from "../shared/utils";
25 const server = express();
26 const [hostname, port] = process.env["LEMMY_UI_HOST"]
27 ? process.env["LEMMY_UI_HOST"].split(":")
28 : ["0.0.0.0", "1234"];
29 const extraThemesFolder =
30 process.env["LEMMY_UI_EXTRA_THEMES_FOLDER"] || "./extra_themes";
32 if (!process.env["LEMMY_UI_DISABLE_CSP"] && !process.env["LEMMY_UI_DEBUG"]) {
33 server.use(function (_req, res, next) {
35 "Content-Security-Policy",
36 `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 *`
41 const customHtmlHeader = process.env["LEMMY_UI_CUSTOM_HTML_HEADER"] || "";
43 server.use(express.json());
44 server.use(express.urlencoded({ extended: false }));
45 server.use("/static", express.static(path.resolve("./dist")));
47 const robotstxt = `User-Agent: *
50 Disallow: /create_community
51 Disallow: /create_post
52 Disallow: /create_private_message
56 Disallow: /password_change
60 server.get("/robots.txt", async (_req, res) => {
61 res.setHeader("content-type", "text/plain; charset=utf-8");
65 server.get("/css/themes/:name", async (req, res) => {
66 res.contentType("text/css");
67 const theme = req.params.name;
68 if (!theme.endsWith(".css")) {
69 res.send("Theme must be a css file");
72 const customTheme = path.resolve(`./${extraThemesFolder}/${theme}`);
73 if (fs.existsSync(customTheme)) {
74 res.sendFile(customTheme);
76 const internalTheme = path.resolve(`./dist/assets/css/themes/${theme}`);
77 res.sendFile(internalTheme);
81 function buildThemeList(): string[] {
100 if (fs.existsSync(extraThemesFolder)) {
101 let dirThemes = fs.readdirSync(extraThemesFolder);
102 let cssThemes = dirThemes
103 .filter(d => d.endsWith(".css"))
104 .map(d => d.replace(".css", ""));
105 themes.push(...cssThemes);
110 server.get("/css/themelist", async (_req, res) => {
112 res.send(JSON.stringify(buildThemeList()));
115 // server.use(cookieParser());
116 server.get("/*", async (req, res) => {
118 const activeRoute = routes.find(route => matchPath(req.path, route)) || {};
119 const context = {} as any;
120 let auth: Option<string> = toOption(IsomorphicCookie.load("jwt", req));
122 let getSiteForm = new GetSite({ auth });
124 let promises: Promise<any>[] = [];
126 let headers = setForwardedHeaders(req.headers);
128 let initialFetchReq: InitialFetchRequest = {
129 client: new LemmyHttp(httpBaseInternal, headers),
134 // Get site data first
135 // This bypasses errors, so that the client can hit the error on its own,
136 // in order to remove the jwt on the browser. Necessary for wrong jwts
137 let try_site: any = await initialFetchReq.client.getSite(getSiteForm);
138 if (try_site.error == "not_logged_in") {
140 "Incorrect JWT token, skipping auth so frontend can remove jwt cookie"
142 getSiteForm.auth = None;
143 initialFetchReq.auth = None;
144 try_site = await initialFetchReq.client.getSite(getSiteForm);
146 let site: GetSiteResponse = try_site;
147 initializeSite(site);
149 if (activeRoute.fetchInitialData) {
150 promises.push(...activeRoute.fetchInitialData(initialFetchReq));
153 let routeData = await Promise.all(promises);
155 // Redirect to the 404 if there's an API error
156 if (routeData[0] && routeData[0].error) {
157 let errCode = routeData[0].error;
158 console.error(errCode);
159 if (errCode == "instance_is_private") {
160 return res.redirect(`/signup`);
162 return res.send(`404: ${removeAuthParam(errCode)}`);
166 let isoData: IsoData = {
173 <StaticRouter location={req.url} context={isoData}>
178 return res.redirect(context.url);
183 <script src="//cdn.jsdelivr.net/npm/eruda"></script>
184 <script>eruda.init();</script>
187 const erudaStr = process.env["LEMMY_UI_DEBUG"] ? renderToString(eruda) : "";
188 const root = renderToString(wrapper);
189 const symbols = renderToString(SYMBOLS);
190 const helmet = Helmet.renderStatic();
192 const config: ILemmyConfig = { wsHost: process.env.LEMMY_UI_LEMMY_WS_HOST };
196 <html ${helmet.htmlAttributes.toString()} lang="en">
198 <script>window.isoData = ${serializeO(isoData)}</script>
199 <script>window.lemmyConfig = ${serialize(config)}</script>
201 <!-- A remote debugging utility for mobile -->
204 <!-- Custom injected script -->
207 ${helmet.title.toString()}
208 ${helmet.meta.toString()}
210 <!-- Required meta tags -->
211 <meta name="Description" content="Lemmy">
212 <meta charset="utf-8">
213 <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
215 <!-- Web app manifest -->
216 <link rel="manifest" href="/static/assets/manifest.webmanifest">
219 <link rel="stylesheet" type="text/css" href="/static/styles/styles.css" />
221 <!-- Current theme and more -->
222 ${helmet.link.toString()}
229 <body ${helmet.bodyAttributes.toString()}>
231 <div class="alert alert-danger rounded-0" role="alert">
232 <b>Javascript is disabled. Actions will not work.</b>
236 <div id='root'>${root}</div>
237 <script defer src='/static/js/client.js'></script>
243 return res.send(`404: ${removeAuthParam(err)}`);
247 server.listen(Number(port), hostname, () => {
248 console.log(`http://${hostname}:${port}`);
251 function setForwardedHeaders(headers: IncomingHttpHeaders): {
252 [key: string]: string;
257 if (headers["x-real-ip"]) {
258 out["x-real-ip"] = headers["x-real-ip"];
260 if (headers["x-forwarded-for"]) {
261 out["x-forwarded-for"] = headers["x-forwarded-for"];
267 process.on("SIGINT", () => {
268 console.info("Interrupted");
272 function removeAuthParam(err: any): string {
273 return removeParam(err.toString(), "auth");
276 function removeParam(url: string, parameter: string): string {
278 .replace(new RegExp("[?&]" + parameter + "=[^&#]*(#.*)?$"), "$1")
279 .replace(new RegExp("([?&])" + parameter + "=[^&]*&"), "$1");