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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 | 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 4x 4x 4x 4x 4x 4x 4x 8x 8x 8x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x | import type { ExpandedPlainwebConfig, MiddlewareStackArgs } from "config"; import type { BetterSQLite3Database } from "drizzle-orm/better-sqlite3"; import errorHandler from "errorhandler"; import express from "express"; import expressRateLimit from "express-rate-limit"; import helmet from "helmet"; import { randomId } from "id"; import { getLogger } from "log"; import morgan from "morgan"; import { fileRouter as plainFileRouter } from "./file-router"; import { hasPendingMigrations, migrate } from "./migrate"; const log = getLogger("middleware"); function preferHeader( request: express.Request, from: string, to: string, ): void { const preferredValue = request.get(from.toLowerCase()); if (preferredValue == null) return; delete request.headers[to]; request.headers[to.toLowerCase()] = preferredValue; } type Config = ExpandedPlainwebConfig<Record<string, unknown>>; function flyHeaders(): express.RequestHandler { return function flyHeaders(req, res, next) { if (process.env.FLY_APP_NAME == null) return next(); log.info("this is a fly app, setting fly headers"); req.app.set("trust proxy", true); preferHeader(req, "Fly-Client-IP", "X-Forwarded-For"); preferHeader(req, "Fly-Forwarded-Port", "X-Forwarded-Port"); preferHeader(req, "Fly-Forwarded-Proto", "X-Forwarded-Protocol"); preferHeader(req, "Fly-Forwarded-Ssl", "X-Forwarded-Ssl"); return next(); }; } function migrations( config: Pick<Config, "database" | "paths" | "nodeEnv">, ): express.RequestHandler { return async (req, res, next) => { if (config.nodeEnv === "production") return next(); log.info("checking for pending migrations"); const pendingMigrations = await hasPendingMigrations(config); if (!pendingMigrations) return next(); log.info("pending migrations found"); await migrate(config); next(); }; } export function forceWWW( config: Pick<Config, "nodeEnv">, ): express.RequestHandler { return function forceWWW( req: express.Request, res: express.Response, next: express.NextFunction, ) { if (config.nodeEnv === "development") return next(); const host = req.header("host"); if (host) { const wwwRegex = /^www\./i; const isWww = wwwRegex.test(host); const isSubdomain = host.split(".").length > 2; if (!isWww && !isSubdomain) { const lowercaseHost = host.toLowerCase(); // Convert host to lowercase const newUrl = `https://www.${lowercaseHost}${req.url}`; log.info("redirecting to", newUrl); res.redirect(301, newUrl); } else { next(); } } else { next(); } }; } function logging(config: Pick<Config, "nodeEnv">): express.RequestHandler { const logger = getLogger(); return morgan( ":method :url :status :res[content-length] - :response-time ms", { stream: { write: (message) => logger.http(message.trim()), }, }, ); } function error(config: Pick<Config, "nodeEnv">): express.ErrorRequestHandler { if (config.nodeEnv === "development") return errorHandler(); return (err, req, res, next) => { log.error(err); next(err); }; } function security(config: Pick<Config, "nodeEnv">): express.RequestHandler { return (req, res, next) => { if (config.nodeEnv === "development") return next(); return helmet(); }; } function staticFiles({ nodeEnv, dir, }: { nodeEnv: "development" | "production" | "test"; dir: string; }): express.RequestHandler { if (nodeEnv === "development") return express.static(dir); return (req, res, next) => next(); } function rateLimit({ nodeEnv, rateLimit, }: { nodeEnv: "development" | "production" | "test"; rateLimit?: { windowMs?: number; limit?: number; message?: string }; }): express.RequestHandler { if (nodeEnv !== "development") return (req, res, next) => next(); return expressRateLimit({ windowMs: rateLimit?.windowMs ?? 60 * 1000, limit: rateLimit?.limit ?? 60, message: rateLimit?.message ?? "Too many requests, please try again in a few seconds", }); } function redirect({ redirects, }: { redirects: Record<string, string>; }): express.RequestHandler { return (req, res, next) => { const target = redirects[req.path]; if (target) { log.info("redirecting to", target); res.redirect(target); } else { next(); } }; } function json(): express.RequestHandler { return express.json(); } function urlencoded(): express.RequestHandler { return express.urlencoded({ extended: true }); } function database<T extends Record<string, unknown>>({ database, }: { database: BetterSQLite3Database<T>; }): express.RequestHandler { return (req, res, next) => { log.info("attach database to request"); res.locals.database = database; next(); }; } async function fileRouter({ dir, }: { dir: string; }): Promise<express.RequestHandler> { return plainFileRouter({ dir }); } function id(): express.RequestHandler { return (req, res, next) => { res.locals.id = randomId("req"); next(); }; } export const middleware = { flyHeaders, forceWWW, logging, error, redirect, staticFiles, rateLimit, security, json, urlencoded, database, fileRouter, migrations, id, }; export function defineMiddleware( stack: (opts: MiddlewareStackArgs) => Promise<void> | void, ) { return stack; } |