64 lines
1.8 KiB
JavaScript
64 lines
1.8 KiB
JavaScript
const express = require('express')
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const connectDatadog = require('connect-datadog')
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const uuid = require('uuid/v4')
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const sanitize = require('sanitize-filename')
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const Canvas = require('canvas')
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const Sentry = require('@sentry/node');
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const Fox = require('./js/fox.js')
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const renderFox = require('./js/render-fox.js')
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function composeImage (width, height, seed, version) {
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seed = seed || uuid()
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const fox = Fox(width, height, seed)
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const canvas = Canvas.createCanvas(width, height)
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renderFox(canvas, fox)
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return canvas
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}
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function getFox (req, res, version) {
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let width = parseInt(req.params.width) || 400
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if (width > 400) width = 400
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const seed = sanitize(req.params.seed) || uuid()
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const etag = `W/${seed}`
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const contentType = 'image/png'
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res.set('Cache-Control', 'public; max-age=' + cacheTimeout)
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res.set('Content-Type', contentType)
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res.set('Etag', etag)
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if (req.headers['if-none-match'] === etag) {
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res.status(304).end('')
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return
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}
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const canvas = composeImage(width, width, seed, version)
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const buffer = canvas.toBuffer(contentType)
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res.set('Content-Length', buffer.length)
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res.end(buffer, 'binary')
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}
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const cacheTimeout = 60 * 60 * 24 * 30
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const app = express()
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app.use(connectDatadog({stat: 'foxy-moxy'}))
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Sentry.init({ dsn: 'https://46660182a19d400f9775f441ac9bcf15@sentry.io/1780766' })
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// The request handler must be the first middleware on the app
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app.use(Sentry.Handlers.requestHandler())
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app.get('/healthcheck', (req, res) => {
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res.status(200).end()
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})
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app.get('/:width/:seed', (req, res) => {
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getFox(req, res)
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})
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app.get('/2/:width/:seed', (req, res) => {
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getFox(req, res)
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})
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// The error handler must be before any other error middleware and after all controllers
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app.use(Sentry.Handlers.errorHandler())
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module.exports = app
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