73 lines
2.2 KiB
JavaScript
73 lines
2.2 KiB
JavaScript
const fs = require('fs')
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const path = require('path')
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const qs = require('querystring')
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const etag = require('etag')
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const { generateDirectoryIndexHTML } = require('./IndexUtils')
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const { getContentType } = require('./FileUtils')
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/**
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* Automatically generate HTML pages that show package contents.
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*/
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const AutoIndex = !process.env.DISABLE_INDEX
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function sendFile(res, file, stats) {
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let contentType = getContentType(file)
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if (contentType === 'text/html')
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contentType = 'text/plain' // We can't serve HTML because bad people :(
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res.writeHead(200, {
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'Content-Type': contentType,
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'Content-Length': stats.size,
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'ETag': etag(stats)
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})
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const stream = fs.createReadStream(file)
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stream.on('error', (error) => {
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console.error(error)
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res.status(500).type('text').send('There was an error serving this file')
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})
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stream.pipe(res)
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}
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/**
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* Send the file, JSON metadata, or HTML directory listing.
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*/
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function serveFile(req, res, next) {
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if (req.query.meta != null || req.query.json != null) {
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// Preserve support for ?meta and ?json for backwards compat.
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delete req.query.meta
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delete req.query.json
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const search = qs.stringify(req.query)
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res.status(301).redirect(`/_meta${req.pathname}${search}`)
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} else if (req.stats.isFile()) {
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// Cache files for 1 year.
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res.set({
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'Cache-Control': 'public, max-age=31536000',
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'Cache-Tag': 'file'
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})
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// TODO: use res.sendFile instead of our own sendFile?
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sendFile(res, path.join(req.packageDir, req.file), req.stats)
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} else if (AutoIndex && req.stats.isDirectory()) {
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generateDirectoryIndexHTML(req.packageInfo, req.packageVersion, req.packageDir, req.file, function (error, html) {
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if (error) {
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console.error(error)
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res.status(500).type('text').send(`Cannot generate index page for ${req.packageSpec}${req.filename}`)
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} else {
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// Cache HTML directory listings for 1 minute.
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res.set({
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'Cache-Control': 'public, max-age=60',
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'Cache-Tag': 'index'
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}).send(html)
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}
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})
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} else {
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res.status(403).type('text').send(`Cannot serve ${req.packageSpec}${req.filename}; it's not a file`)
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}
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}
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module.exports = serveFile
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