mirror of
https://github.com/LemmyNet/lemmy-ui.git
synced 2024-12-11 21:41:28 +00:00
180 lines
5.2 KiB
TypeScript
180 lines
5.2 KiB
TypeScript
import serialize from "serialize-javascript";
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import express from "express";
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import { StaticRouter } from "inferno-router";
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import { renderToString } from "inferno-server";
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import { matchPath } from "inferno-router";
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import path from "path";
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import { App } from "../shared/components/app";
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import {
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ILemmyConfig,
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InitialFetchRequest,
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IsoData,
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} from "../shared/interfaces";
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import { routes } from "../shared/routes";
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import IsomorphicCookie from "isomorphic-cookie";
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import { GetSite, GetSiteResponse, LemmyHttp } from "lemmy-js-client";
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import process from "process";
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import { Helmet } from "inferno-helmet";
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import { initializeSite } from "../shared/initialize";
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import { httpUri } from "../shared/env";
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import { IncomingHttpHeaders } from "http";
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import { setOptionalAuth } from "../shared/utils";
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const server = express();
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const port = 1234;
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server.use(express.json());
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server.use(express.urlencoded({ extended: false }));
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server.use("/static", express.static(path.resolve("./dist")));
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// server.use(cookieParser());
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server.get("/*", async (req, res) => {
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const activeRoute = routes.find(route => matchPath(req.path, route)) || {};
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const context = {} as any;
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let auth: string = IsomorphicCookie.load("jwt", req);
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let getSiteForm: GetSite = {};
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setOptionalAuth(getSiteForm, auth);
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let promises: Promise<any>[] = [];
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let headers = setForwardedHeaders(req.headers);
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let initialFetchReq: InitialFetchRequest = {
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client: new LemmyHttp(httpUri, headers),
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auth,
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path: req.path,
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};
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// Get site data first
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// This bypasses errors, so that the client can hit the error on its own,
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// in order to remove the jwt on the browser. Necessary for wrong jwts
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let try_site: any = await initialFetchReq.client.getSite(getSiteForm);
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if (try_site.error == "not_logged_in") {
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console.error(
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"Incorrect JWT token, skipping auth so frontend can remove jwt cookie"
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);
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delete getSiteForm.auth;
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delete initialFetchReq.auth;
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try_site = await initialFetchReq.client.getSite(getSiteForm);
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}
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let site: GetSiteResponse = try_site;
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initializeSite(site);
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if (activeRoute.fetchInitialData) {
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promises.push(...activeRoute.fetchInitialData(initialFetchReq));
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}
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let routeData = await Promise.all(promises);
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// Redirect to the 404 if there's an API error
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if (routeData[0] && routeData[0].error) {
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let errCode = routeData[0].error;
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return res.redirect(`/404?err=${errCode}`);
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}
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let acceptLang = req.headers["accept-language"]
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? req.headers["accept-language"].split(",")[0]
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: "en";
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let lang = site.my_user
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? site.my_user.local_user.lang == "browser"
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? acceptLang
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: "en"
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: acceptLang;
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let isoData: IsoData = {
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path: req.path,
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site_res: site,
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routeData,
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lang,
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};
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const wrapper = (
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<StaticRouter location={req.url} context={isoData}>
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<App siteRes={isoData.site_res} />
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</StaticRouter>
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);
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if (context.url) {
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return res.redirect(context.url);
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}
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const cspHtml = (
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<meta
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http-equiv="Content-Security-Policy"
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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'"
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/>
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);
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const root = renderToString(wrapper);
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const cspStr = process.env.LEMMY_EXTERNAL_HOST ? renderToString(cspHtml) : "";
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const helmet = Helmet.renderStatic();
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const config: ILemmyConfig = { wsHost: process.env.LEMMY_WS_HOST };
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res.send(`
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<!DOCTYPE html>
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<html ${helmet.htmlAttributes.toString()} lang="en">
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<head>
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<script>window.isoData = ${serialize(isoData)}</script>
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<script>window.lemmyConfig = ${serialize(config)}</script>
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${helmet.title.toString()}
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${helmet.meta.toString()}
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<!-- Required meta tags -->
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<meta name="Description" content="Lemmy">
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
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<!-- Content Security Policy -->
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${cspStr}
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<!-- Web app manifest -->
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<link rel="manifest" href="/static/assets/manifest.webmanifest">
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<!-- Styles -->
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<link rel="stylesheet" type="text/css" href="/static/styles/styles.css" />
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<!-- Current theme and more -->
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${helmet.link.toString()}
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</head>
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<body ${helmet.bodyAttributes.toString()}>
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<noscript>
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<div class="alert alert-danger rounded-0" role="alert">
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<b>Javascript is disabled. Actions will not work.</b>
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</div>
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</noscript>
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<div id='root'>${root}</div>
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<script defer src='/static/js/client.js'></script>
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</body>
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</html>
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`);
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});
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server.listen(port, () => {
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console.log(`http://localhost:${port}`);
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});
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function setForwardedHeaders(
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headers: IncomingHttpHeaders
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): { [key: string]: string } {
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let out = {
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host: headers.host,
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};
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if (headers["x-real-ip"]) {
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out["x-real-ip"] = headers["x-real-ip"];
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}
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if (headers["x-forwarded-for"]) {
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out["x-forwarded-for"] = headers["x-forwarded-for"];
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}
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return out;
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}
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process.on("SIGINT", () => {
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console.info("Interrupted");
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process.exit(0);
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});
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