../big-file-download
├── package.json
├── src
│ └── server.js
└── static
├── index.html
├── not-found.html
└── very-big-file.xlsx <- 100mb
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January 26, 2018 18:16
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{ | |
"name": "big-file-download", | |
"version": "1.0.0", | |
"scripts": { | |
"start": "node src/server.js" | |
}, | |
"author": "Marcus Ortense", | |
"dependencies": { | |
"mime-types": "^2.1.17" | |
} | |
} |
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const fs = require('fs') | |
const http = require('http') | |
const path = require('path') | |
const mime = require('mime-types') | |
const errorHandler = (error, response) => { | |
response.statusCode = 500 | |
response.setHeader('Content-Type', 'text/html') | |
response.end(`<h1>${error.message}</h1>`) | |
} | |
const render = (file, status = 200) => (request, response) => { | |
const filePath = path.resolve(__dirname, `../static/${file}`) | |
response.statusCode = status | |
response.setHeader('Content-Type', 'text/html') | |
fs.readFile(filePath, 'utf8', (error, content) => { | |
if (error) return errorHandler(error, response) | |
return response.end(content) | |
}) | |
} | |
const stream = file => (request, response) => { | |
const filePath = path.resolve(__dirname, `../static/${file}`) | |
const readStream = fs.createReadStream(filePath) | |
response.statusCode = 200 | |
response.setHeader('Content-Type', mime.lookup(file)) | |
readStream.on('error', error => errorHandler(error, response)) | |
readStream.pipe(response) | |
} | |
const routes = { | |
'/': render('index.html'), | |
'/not-found': render('not-found.html', 404), | |
'/big-file.xlsx': stream('very-big-file.xlsx') | |
} | |
const server = http.createServer((request, response) => | |
(routes[request.url] || routes['/not-found'])(request, response)) | |
server.listen(3000, () => console.log('Server up at http://localhost:3000')) |
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