101 lines
3.0 KiB
JavaScript
101 lines
3.0 KiB
JavaScript
const fs = require('fs')
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const path = require('path')
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const babel = require('babel-core')
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const unpkgRewrite = require('babel-plugin-unpkg-rewrite')
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const getMetadata = require('./utils/getMetadata')
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const getFileContentType = require('./utils/getFileContentType')
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const getIndexHTML = require('./utils/getIndexHTML')
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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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/**
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* Maximum recursion depth for meta listings.
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*/
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const MaximumDepth = 128
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const FileTransforms = {
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expand: function (file, dependencies, callback) {
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const options = {
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plugins: [
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unpkgRewrite(dependencies)
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]
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}
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babel.transformFile(file, options, function (error, result) {
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callback(error, result && result.code)
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})
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}
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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) {
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getMetadata(req.packageDir, req.file, req.stats, MaximumDepth, function (error, metadata) {
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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 metadata for ${req.packageSpec}${req.filename}`)
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} else {
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// Cache metadata 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': 'meta'
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}).send(metadata)
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}
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})
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} else if (req.stats.isFile()) {
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const file = path.join(req.packageDir, req.file)
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let contentType = getFileContentType(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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// Cache files for 1 year.
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res.set({
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'Content-Type': contentType,
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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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if (contentType === 'application/javascript' && req.query.module != null) {
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const dependencies = Object.assign({},
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req.packageConfig.peerDependencies,
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req.packageConfig.dependencies
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)
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FileTransforms.expand(file, dependencies, function (error, code) {
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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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res.send(code)
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}
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})
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} else {
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res.sendFile(file)
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}
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} else if (AutoIndex && req.stats.isDirectory()) {
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getIndexHTML(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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