100 lines
2.7 KiB
JavaScript
100 lines
2.7 KiB
JavaScript
const fs = require('fs')
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const path = require('path')
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const http = require('http')
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const express = require('express')
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const cors = require('cors')
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const morgan = require('morgan')
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const { fetchStats } = require('./cloudflare')
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const parseURL = require('./middleware/parseURL')
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const checkBlacklist = require('./middleware/checkBlacklist')
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const fetchPackage = require('./middleware/fetchPackage')
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const findFile = require('./middleware/findFile')
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const serveFile = require('./middleware/serveFile')
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morgan.token('fwd', function (req) {
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return req.get('x-forwarded-for').replace(/\s/g, '')
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})
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function sendHomePage(publicDir) {
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const html = fs.readFileSync(path.join(publicDir, 'index.html'), 'utf8')
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return function (req, res, next) {
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fetchStats(function (error, stats) {
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if (error) {
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next(error)
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} else {
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res.set({
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'Cache-Control': 'public, max-age=60',
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'Cache-Tag': 'home'
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})
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res.send(
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// Replace the __SERVER_DATA__ token that was added to the
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// HTML file in the build process (see scripts/build.js).
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html.replace('__SERVER_DATA__', JSON.stringify({
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cloudflareStats: stats
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}))
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)
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}
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})
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}
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}
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function errorHandler(err, req, res, next) {
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res.status(500).type('text').send('Internal Server Error')
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console.error(err.stack)
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next(err)
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}
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function createServer() {
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const app = express()
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app.disable('x-powered-by')
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app.use(morgan(process.env.NODE_ENV === 'production'
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// Modified version of the Heroku router's log format
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// https://devcenter.heroku.com/articles/http-routing#heroku-router-log-format
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? 'method=:method path=":url" host=:req[host] request_id=:req[x-request-id] cf_ray=:req[cf-ray] fwd=:fwd status=:status bytes=:res[content-length]'
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: 'dev'
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))
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app.use(errorHandler)
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app.use(cors())
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app.get('/', sendHomePage('build'))
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app.use(express.static('build', {
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maxAge: '365d'
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}))
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app.use(parseURL)
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app.use(checkBlacklist)
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app.use(fetchPackage)
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app.use(findFile)
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app.use(serveFile)
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const server = http.createServer(app)
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// Heroku dynos automatically timeout after 30s. Set our
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// own timeout here to force sockets to close before that.
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// https://devcenter.heroku.com/articles/request-timeout
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server.setTimeout(25000, function (socket) {
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const message = `Timeout of 25 seconds exceeded`
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socket.end([
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`HTTP/1.1 503 Service Unavailable`,
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`Date: ${(new Date).toGMTString()}`,
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`Content-Type: text/plain`,
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`Content-Length: ${Buffer.byteLength(message)}`,
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`Connection: close`,
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``,
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message
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].join(`\r\n`))
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})
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return server
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}
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module.exports = createServer
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