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Prettier everything up

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This commit is contained in:
MICHAEL JACKSON
2017-11-08 08:57:15 -08:00
parent f3e041ace6
commit 2d57d96e62
36 changed files with 785 additions and 577 deletions
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7
server/middleware/checkBlacklist.js
View File

@ -1,8 +1,11 @@
function checkBlacklist(blacklist) {
return function (req, res, next) {
return function(req, res, next) {
// Do not allow packages that have been blacklisted.
if (blacklist.includes(req.packageName)) {
res.status(403).type('text').send(`Package "${req.packageName}" is blacklisted`)
res
.status(403)
.type('text')
.send(`Package "${req.packageName}" is blacklisted`)
} else {
next()
}

49
server/middleware/components/DirectoryListing.js
View File

@ -4,27 +4,28 @@ const getFileContentType = require('../utils/getFileContentType')
const e = React.createElement
const formatTime = (time) =>
new Date(time).toISOString()
const formatTime = time => new Date(time).toISOString()
const DirectoryListing = ({ dir, entries }) => {
const rows = entries.map(({ file, stats }, index) => {
const isDir = stats.isDirectory()
const href = file + (isDir ? '/' : '')
return (
e('tr', { key: file, className: index % 2 ? 'odd' : 'even' },
e('td', null, e('a', { title: file, href }, file)),
e('td', null, isDir ? '-' : getFileContentType(file)),
e('td', null, isDir ? '-' : prettyBytes(stats.size)),
e('td', null, isDir ? '-' : formatTime(stats.mtime))
)
return e(
'tr',
{ key: file, className: index % 2 ? 'odd' : 'even' },
e('td', null, e('a', { title: file, href }, file)),
e('td', null, isDir ? '-' : getFileContentType(file)),
e('td', null, isDir ? '-' : prettyBytes(stats.size)),
e('td', null, isDir ? '-' : formatTime(stats.mtime))
)
})
if (dir !== '/')
rows.unshift(
e('tr', { key: '..', className: 'odd' },
e(
'tr',
{ key: '..', className: 'odd' },
e('td', null, e('a', { title: 'Parent directory', href: '../' }, '..')),
e('td', null, '-'),
e('td', null, '-'),
@ -32,18 +33,22 @@ const DirectoryListing = ({ dir, entries }) => {
)
)
return (
e('table', null,
e('thead', null,
e('tr', null,
e('th', null, 'Name'),
e('th', null, 'Type'),
e('th', null, 'Size'),
e('th', null, 'Last Modified')
)
),
e('tbody', null, rows)
)
return e(
'table',
null,
e(
'thead',
null,
e(
'tr',
null,
e('th', null, 'Name'),
e('th', null, 'Type'),
e('th', null, 'Size'),
e('th', null, 'Last Modified')
)
),
e('tbody', null, rows)
)
}

53
server/middleware/components/IndexPage.js
View File

@ -13,34 +13,41 @@ s.onchange = function () {
}
`
const byVersion = (a, b) =>
semver.lt(a, b) ? -1 : (semver.gt(a, b) ? 1 : 0)
const byVersion = (a, b) => (semver.lt(a, b) ? -1 : semver.gt(a, b) ? 1 : 0)
const IndexPage = ({ packageInfo, version, dir, entries }) => {
const versions = Object.keys(packageInfo.versions).sort(byVersion)
const options = versions.map(v => (
const options = versions.map(v =>
e('option', { key: v, value: v }, `${packageInfo.name}@${v}`)
))
)
return (
e('html', null,
e('head', null,
e('meta', { charSet: 'utf-8' }),
e('title', null, `Index of ${dir}`),
e('style', { dangerouslySetInnerHTML: { __html: IndexPageStyle } })
),
e('body', null,
e('div', { className: 'content-wrapper' },
e('div', { className: 'version-wrapper' },
e('select', { id: 'version', defaultValue: version }, options)
),
e('h1', null, `Index of ${dir}`),
e('script', { dangerouslySetInnerHTML: { __html: IndexPageScript } }),
e('hr'),
e(DirectoryListing, { dir, entries }),
e('hr'),
e('address', null, `${packageInfo.name}@${version}`)
)
return e(
'html',
null,
e(
'head',
null,
e('meta', { charSet: 'utf-8' }),
e('title', null, `Index of ${dir}`),
e('style', { dangerouslySetInnerHTML: { __html: IndexPageStyle } })
),
e(
'body',
null,
e(
'div',
{ className: 'content-wrapper' },
e(
'div',
{ className: 'version-wrapper' },
e('select', { id: 'version', defaultValue: version }, options)
),
e('h1', null, `Index of ${dir}`),
e('script', { dangerouslySetInnerHTML: { __html: IndexPageScript } }),
e('hr'),
e(DirectoryListing, { dir, entries }),
e('hr'),
e('address', null, `${packageInfo.name}@${version}`)
)
)
)

130
server/middleware/fetchFile.js
View File

@ -13,18 +13,18 @@ function getBasename(file) {
/**
* File extensions to look for when automatically resolving.
*/
const FindExtensions = [ '', '.js', '.json' ]
const FindExtensions = ['', '.js', '.json']
/**
* Resolves a path like "lib/file" into "lib/file.js" or "lib/file.json"
* depending on which one is available, similar to require('lib/file').
*/
function findFile(base, useIndex, callback) {
FindExtensions.reduceRight(function (next, ext) {
FindExtensions.reduceRight(function(next, ext) {
const file = base + ext
return function () {
fs.stat(file, function (error, stats) {
return function() {
fs.stat(file, function(error, stats) {
if (error) {
if (error.code === 'ENOENT' || error.code === 'ENOTDIR') {
next()
@ -32,7 +32,11 @@ function findFile(base, useIndex, callback) {
callback(error)
}
} else if (useIndex && stats.isDirectory()) {
findFile(path.join(file, 'index'), false, function (error, indexFile, indexStats) {
findFile(path.join(file, 'index'), false, function(
error,
indexFile,
indexStats
) {
if (error) {
callback(error)
} else if (indexFile) {
@ -55,14 +59,20 @@ function findFile(base, useIndex, callback) {
* trailing slash.
*/
function fetchFile(req, res, next) {
getPackageInfo(req.packageName, function (error, packageInfo) {
getPackageInfo(req.packageName, function(error, packageInfo) {
if (error) {
console.error(error)
return res.status(500).type('text').send(`Cannot get info for package "${req.packageName}"`)
return res
.status(500)
.type('text')
.send(`Cannot get info for package "${req.packageName}"`)
}
if (packageInfo == null || packageInfo.versions == null)
return res.status(404).type('text').send(`Cannot find package "${req.packageName}"`)
return res
.status(404)
.type('text')
.send(`Cannot find package "${req.packageName}"`)
req.packageInfo = packageInfo
@ -70,10 +80,13 @@ function fetchFile(req, res, next) {
// A valid request for a package we haven't downloaded yet.
req.packageConfig = req.packageInfo.versions[req.packageVersion]
getPackage(req.packageConfig, function (error, outputDir) {
getPackage(req.packageConfig, function(error, outputDir) {
if (error) {
console.error(error)
res.status(500).type('text').send(`Cannot fetch package ${req.packageSpec}`)
res
.status(500)
.type('text')
.send(`Cannot fetch package ${req.packageSpec}`)
} else {
req.packageDir = outputDir
@ -84,12 +97,18 @@ function fetchFile(req, res, next) {
// They want an ES module. Try "module", "jsnext:main", and "/"
// https://github.com/rollup/rollup/wiki/pkg.module
if (!filename)
filename = req.packageConfig.module || req.packageConfig['jsnext:main'] || '/'
filename =
req.packageConfig.module ||
req.packageConfig['jsnext:main'] ||
'/'
} else if (filename) {
// They are requesting an explicit filename. Only try to find an
// index file if they are NOT requesting an HTML directory listing.
useIndex = filename[filename.length - 1] !== '/'
} else if (req.query.main && typeof req.packageConfig[req.query.main] === 'string') {
} else if (
req.query.main &&
typeof req.packageConfig[req.query.main] === 'string'
) {
// They specified a custom ?main field.
filename = req.packageConfig[req.query.main]
} else if (typeof req.packageConfig.unpkg === 'string') {
@ -104,23 +123,46 @@ function fetchFile(req, res, next) {
filename = req.packageConfig.main || '/'
}
findFile(path.join(req.packageDir, filename), useIndex, function (error, file, stats) {
if (error)
console.error(error)
findFile(path.join(req.packageDir, filename), useIndex, function(
error,
file,
stats
) {
if (error) console.error(error)
if (file == null)
return res.status(404).type('text').send(`Cannot find module "${filename}" in package ${req.packageSpec}`)
return res
.status(404)
.type('text')
.send(
`Cannot find module "${filename}" in package ${
req.packageSpec
}`
)
filename = file.replace(req.packageDir, '')
if (req.query.main != null || getBasename(req.filename) !== getBasename(filename)) {
if (
req.query.main != null ||
getBasename(req.filename) !== getBasename(filename)
) {
// Need to redirect to the module file so relative imports resolve
// correctly. Cache module redirects for 1 minute.
delete req.query.main
res.set({
'Cache-Control': 'public, max-age=60',
'Cache-Tag': 'redirect,module-redirect'
}).redirect(302, createPackageURL(req.packageName, req.packageVersion, filename, createSearch(req.query)))
res
.set({
'Cache-Control': 'public, max-age=60',
'Cache-Tag': 'redirect,module-redirect'
})
.redirect(
302,
createPackageURL(
req.packageName,
req.packageVersion,
filename,
createSearch(req.query)
)
)
} else {
req.filename = filename
req.stats = stats
@ -131,21 +173,47 @@ function fetchFile(req, res, next) {
})
} else if (req.packageVersion in req.packageInfo['dist-tags']) {
// Cache tag redirects for 1 minute.
res.set({
'Cache-Control': 'public, max-age=60',
'Cache-Tag': 'redirect,tag-redirect'
}).redirect(302, createPackageURL(req.packageName, req.packageInfo['dist-tags'][req.packageVersion], req.filename, req.search))
res
.set({
'Cache-Control': 'public, max-age=60',
'Cache-Tag': 'redirect,tag-redirect'
})
.redirect(
302,
createPackageURL(
req.packageName,
req.packageInfo['dist-tags'][req.packageVersion],
req.filename,
req.search
)
)
} else {
const maxVersion = semver.maxSatisfying(Object.keys(req.packageInfo.versions), req.packageVersion)
const maxVersion = semver.maxSatisfying(
Object.keys(req.packageInfo.versions),
req.packageVersion
)
if (maxVersion) {
// Cache semver redirects for 1 minute.
res.set({
'Cache-Control': 'public, max-age=60',
'Cache-Tag': 'redirect,semver-redirect'
}).redirect(302, createPackageURL(req.packageName, maxVersion, req.filename, req.search))
res
.set({
'Cache-Control': 'public, max-age=60',
'Cache-Tag': 'redirect,semver-redirect'
})
.redirect(
302,
createPackageURL(
req.packageName,
maxVersion,
req.filename,
req.search
)
)
} else {
res.status(404).type('text').send(`Cannot find package ${req.packageSpec}`)
res
.status(404)
.type('text')
.send(`Cannot find package ${req.packageSpec}`)
}
}
})

17
server/middleware/packageURL.js
View File

@ -19,9 +19,8 @@ function queryIsKnown(query) {
function sanitizeQuery(query) {
const saneQuery = {}
Object.keys(query).forEach(function (param) {
if (isKnownQueryParam(param))
saneQuery[param] = query[param]
Object.keys(query).forEach(function(param) {
if (isKnownQueryParam(param)) saneQuery[param] = query[param]
})
return saneQuery
@ -54,13 +53,21 @@ function packageURL(req, res, next) {
// Do not allow invalid URLs.
if (url == null)
return res.status(403).type('text').send(`Invalid URL: ${req.url}`)
return res
.status(403)
.type('text')
.send(`Invalid URL: ${req.url}`)
const nameErrors = validateNPMPackageName(url.packageName).errors
// Do not allow invalid package names.
if (nameErrors)
return res.status(403).type('text').send(`Invalid package name: ${url.packageName} (${nameErrors.join(', ')})`)
return res
.status(403)
.type('text')
.send(
`Invalid package name: ${url.packageName} (${nameErrors.join(', ')})`
)
req.packageName = url.packageName
req.packageVersion = url.packageVersion

118
server/middleware/serveFile.js
View File

@ -18,36 +18,43 @@ const AutoIndex = !process.env.DISABLE_INDEX
const MaximumDepth = 128
const FileTransforms = {
expand: function (file, dependencies, callback) {
expand: function(file, dependencies, callback) {
const options = {
plugins: [
unpkgRewrite(dependencies)
]
plugins: [unpkgRewrite(dependencies)]
}
babel.transformFile(file, options, function (error, result) {
babel.transformFile(file, options, function(error, result) {
callback(error, result && result.code)
})
}
}
/**
* Send the file, JSON metadata, or HTML directory listing.
*/
function serveFile(req, res, next) {
if (req.query.meta != null) {
// Serve JSON metadata.
getMetadata(req.packageDir, req.filename, req.stats, MaximumDepth, function (error, metadata) {
getMetadata(req.packageDir, req.filename, req.stats, MaximumDepth, function(
error,
metadata
) {
if (error) {
console.error(error)
res.status(500).type('text').send(`Cannot generate metadata for ${req.packageSpec}${req.filename}`)
res
.status(500)
.type('text')
.send(
`Cannot generate metadata for ${req.packageSpec}${req.filename}`
)
} else {
// Cache metadata for 1 year.
res.set({
'Cache-Control': 'public, max-age=31536000',
'Cache-Tag': 'meta'
}).send(metadata)
res
.set({
'Cache-Control': 'public, max-age=31536000',
'Cache-Tag': 'meta'
})
.send(metadata)
}
})
} else if (req.stats.isFile()) {
@ -56,39 +63,52 @@ function serveFile(req, res, next) {
let contentType = getFileContentType(file)
if (contentType === 'text/html')
contentType = 'text/plain' // We can't serve HTML because bad people :(
if (contentType === 'text/html') contentType = 'text/plain' // We can't serve HTML because bad people :(
if (contentType === 'application/javascript' && req.query.module != null) {
// Serve a JavaScript module.
const dependencies = Object.assign({},
const dependencies = Object.assign(
{},
req.packageConfig.peerDependencies,
req.packageConfig.dependencies
)
FileTransforms.expand(file, dependencies, function (error, code) {
FileTransforms.expand(file, dependencies, function(error, code) {
if (error) {
console.error(error)
const debugInfo = error.constructor.name + ': ' + error.message.replace(/^.*?\/unpkg-.+?\//, `/${req.packageSpec}/`) + '\n\n' + error.codeFrame
res.status(500).type('text').send(`Cannot generate module for ${req.packageSpec}${req.filename}\n\n${debugInfo}`)
const debugInfo =
error.constructor.name +
': ' +
error.message.replace(/^.*?\/unpkg-.+?\//, `/${req.packageSpec}/`) +
'\n\n' +
error.codeFrame
res
.status(500)
.type('text')
.send(
`Cannot generate module for ${req.packageSpec}${
req.filename
}\n\n${debugInfo}`
)
} else {
// Cache modules for 1 year.
res.set({
'Content-Type': contentType,
'Content-Length': Buffer.byteLength(code),
'Cache-Control': 'public, max-age=31536000',
'Cache-Tag': 'file,js-file,js-module'
}).send(code)
res
.set({
'Content-Type': contentType,
'Content-Length': Buffer.byteLength(code),
'Cache-Control': 'public, max-age=31536000',
'Cache-Tag': 'file,js-file,js-module'
})
.send(code)
}
})
} else {
// Serve some other static file.
const tags = [ 'file' ]
const tags = ['file']
const ext = path.extname(req.filename).substr(1)
if (ext)
tags.push(`${ext}-file`)
if (ext) tags.push(`${ext}-file`)
// Cache files for 1 year.
res.set({
@ -96,13 +116,13 @@ function serveFile(req, res, next) {
'Content-Length': req.stats.size,
'Cache-Control': 'public, max-age=31536000',
'Last-Modified': req.stats.mtime.toUTCString(),
'ETag': etag(req.stats),
ETag: etag(req.stats),
'Cache-Tag': tags.join(',')
})
const stream = fs.createReadStream(file)
stream.on('error', function (error) {
stream.on('error', function(error) {
console.error(`Cannot send file ${req.packageSpec}${req.filename}`)
console.error(error)
res.sendStatus(500)
@ -112,20 +132,36 @@ function serveFile(req, res, next) {
}
} else if (AutoIndex && req.stats.isDirectory()) {
// Serve an HTML directory listing.
getIndexHTML(req.packageInfo, req.packageVersion, req.packageDir, req.filename, function (error, html) {
if (error) {
console.error(error)
res.status(500).type('text').send(`Cannot generate index page for ${req.packageSpec}${req.filename}`)
} else {
// Cache HTML directory listings for 1 minute.
res.set({
'Cache-Control': 'public, max-age=60',
'Cache-Tag': 'index'
}).send(html)
getIndexHTML(
req.packageInfo,
req.packageVersion,
req.packageDir,
req.filename,
function(error, html) {
if (error) {
console.error(error)
res
.status(500)
.type('text')
.send(
`Cannot generate index page for ${req.packageSpec}${req.filename}`
)
} else {
// Cache HTML directory listings for 1 minute.
res
.set({
'Cache-Control': 'public, max-age=60',
'Cache-Tag': 'index'
})
.send(html)
}
}
})
)
} else {
res.status(403).type('text').send(`Cannot serve ${req.packageSpec}${req.filename}; it's not a file`)
res
.status(403)
.type('text')
.send(`Cannot serve ${req.packageSpec}${req.filename}; it's not a file`)
}
}

2
server/middleware/utils/createCache.js
View File

@ -10,7 +10,7 @@ function createCache(keyPrefix) {
}
function get(key, callback) {
db.get(createKey(key), function (error, value) {
db.get(createKey(key), function(error, value) {
callback(error, value && JSON.parse(value))
})
}

15
server/middleware/utils/createMutex.js
View File

@ -1,16 +1,19 @@
function createMutex(doWork) {
const mutex = {}
return function (key, payload, callback) {
return function(key, payload, callback) {
if (mutex[key]) {
mutex[key].push(callback)
} else {
mutex[key] = [ function () {
delete mutex[key]
}, callback ]
mutex[key] = [
function() {
delete mutex[key]
},
callback
]
doWork(payload, function (error, value) {
mutex[key].forEach(function (callback) {
doWork(payload, function(error, value) {
mutex[key].forEach(function(callback) {
callback(error, value)
})
})

2
server/middleware/utils/createSearch.js
View File

@ -1,7 +1,7 @@
function createSearch(query) {
const params = []
Object.keys(query).forEach(function (param) {
Object.keys(query).forEach(function(param) {
if (query[param] === '') {
params.push(param) // Omit the trailing "=" from param=
} else {

8
server/middleware/utils/getIndexHTML.js
View File

@ -8,16 +8,16 @@ const IndexPage = require('../components/IndexPage')
const e = React.createElement
function getEntries(dir) {
return new Promise(function (resolve, reject) {
fs.readdir(dir, function (error, files) {
return new Promise(function(resolve, reject) {
fs.readdir(dir, function(error, files) {
if (error) {
reject(error)
} else {
resolve(
Promise.all(
files.map(file => getFileStats(path.join(dir, file)))
).then(function (statsArray) {
return statsArray.map(function (stats, index) {
).then(function(statsArray) {
return statsArray.map(function(stats, index) {
return { file: files[index], stats }
})
})

38
server/middleware/utils/getMetadata.js
View File

@ -6,20 +6,27 @@ const getFileStats = require('./getFileStats')
const getFileType = require('./getFileType')
function getEntries(dir, file, maximumDepth) {
return new Promise(function (resolve, reject) {
fs.readdir(path.join(dir, file), function (error, files) {
return new Promise(function(resolve, reject) {
fs.readdir(path.join(dir, file), function(error, files) {
if (error) {
reject(error)
} else {
resolve(
Promise.all(
files.map(function (f) {
files.map(function(f) {
return getFileStats(path.join(dir, file, f))
})
).then(function (statsArray) {
return Promise.all(statsArray.map(function (stats, index) {
return getMetadataRecursive(dir, path.join(file, files[index]), stats, maximumDepth - 1)
}))
).then(function(statsArray) {
return Promise.all(
statsArray.map(function(stats, index) {
return getMetadataRecursive(
dir,
path.join(file, files[index]),
stats,
maximumDepth - 1
)
})
)
})
)
}
@ -32,12 +39,12 @@ function formatTime(time) {
}
function getIntegrity(file) {
return new Promise(function (resolve, reject) {
fs.readFile(file, function (error, data) {
return new Promise(function(resolve, reject) {
fs.readFile(file, function(error, data) {
if (error) {
reject(error)
} else {
resolve(SRIToolbox.generate({ algorithms: [ 'sha384' ] }, data))
resolve(SRIToolbox.generate({ algorithms: ['sha384'] }, data))
}
})
})
@ -53,7 +60,7 @@ function getMetadataRecursive(dir, file, stats, maximumDepth) {
}
if (stats.isFile()) {
return getIntegrity(path.join(dir, file)).then(function (integrity) {
return getIntegrity(path.join(dir, file)).then(function(integrity) {
metadata.integrity = integrity
return metadata
})
@ -62,16 +69,19 @@ function getMetadataRecursive(dir, file, stats, maximumDepth) {
if (!stats.isDirectory() || maximumDepth === 0)
return Promise.resolve(metadata)
return getEntries(dir, file, maximumDepth).then(function (files) {
return getEntries(dir, file, maximumDepth).then(function(files) {
metadata.files = files
return metadata
})
}
function getMetadata(baseDir, path, stats, maximumDepth, callback) {
getMetadataRecursive(baseDir, path, stats, maximumDepth).then(function (metadata) {
getMetadataRecursive(baseDir, path, stats, maximumDepth).then(function(
metadata
) {
callback(null, metadata)
}, callback)
},
callback)
}
module.exports = getMetadata

14
server/middleware/utils/getPackage.js
View File

@ -26,7 +26,7 @@ function ignoreSymlinks(file, headers) {
}
function extractResponse(response, outputDir) {
return new Promise(function (resolve, reject) {
return new Promise(function(resolve, reject) {
const extract = tar.extract(outputDir, {
readable: true, // All dirs/files should be readable.
map: stripNamePrefix,
@ -44,24 +44,24 @@ function extractResponse(response, outputDir) {
function fetchAndExtract(tarballURL, outputDir) {
console.log(`info: Fetching ${tarballURL} and extracting to ${outputDir}`)
return fetch(tarballURL).then(function (response) {
return fetch(tarballURL).then(function(response) {
return extractResponse(response, outputDir)
})
}
const fetchMutex = createMutex(function (payload, callback) {
const fetchMutex = createMutex(function(payload, callback) {
const { tarballURL, outputDir } = payload
fs.access(outputDir, function (error) {
fs.access(outputDir, function(error) {
if (error) {
if (error.code === 'ENOENT' || error.code === 'ENOTDIR') {
// ENOENT or ENOTDIR are to be expected when we haven't yet
// fetched a package for the first time. Carry on!
mkdirp(outputDir, function (error) {
mkdirp(outputDir, function(error) {
if (error) {
callback(error)
} else {
fetchAndExtract(tarballURL, outputDir).then(function () {
fetchAndExtract(tarballURL, outputDir).then(function() {
callback()
}, callback)
}
@ -80,7 +80,7 @@ function getPackage(packageConfig, callback) {
const tarballURL = packageConfig.dist.tarball
const outputDir = createTempPath(packageConfig.name, packageConfig.version)
fetchMutex(tarballURL, { tarballURL, outputDir }, function (error) {
fetchMutex(tarballURL, { tarballURL, outputDir }, function(error) {
callback(error, outputDir)
})
}

49
server/middleware/utils/getPackageInfo.js
View File

@ -20,9 +20,9 @@ function fetchPackageInfo(packageName) {
return fetch(url, {
headers: {
'Accept': 'application/json'
Accept: 'application/json'
}
}).then(function (res) {
}).then(function(res) {
return res.status === 404 ? null : res.json()
})
}
@ -31,32 +31,35 @@ const PackageNotFound = 'PackageNotFound'
// This mutex prevents multiple concurrent requests to
// the registry for the same package info.
const fetchMutex = createMutex(function (packageName, callback) {
fetchPackageInfo(packageName).then(function (value) {
if (value == null) {
// Cache 404s for 5 minutes. This prevents us from making
// unnecessary requests to the registry for bad package names.
// In the worst case, a brand new package's info will be
// available within 5 minutes.
PackageInfoCache.set(packageName, PackageNotFound, 300, function () {
callback(null, value)
})
} else {
// Cache valid package info for 1 minute.
PackageInfoCache.set(packageName, value, 60, function () {
callback(null, value)
const fetchMutex = createMutex(function(packageName, callback) {
fetchPackageInfo(packageName).then(
function(value) {
if (value == null) {
// Cache 404s for 5 minutes. This prevents us from making
// unnecessary requests to the registry for bad package names.
// In the worst case, a brand new package's info will be
// available within 5 minutes.
PackageInfoCache.set(packageName, PackageNotFound, 300, function() {
callback(null, value)
})
} else {
// Cache valid package info for 1 minute.
PackageInfoCache.set(packageName, value, 60, function() {
callback(null, value)
})
}
},
function(error) {
// Do not cache errors.
PackageInfoCache.del(packageName, function() {
callback(error)
})
}
}, function (error) {
// Do not cache errors.
PackageInfoCache.del(packageName, function () {
callback(error)
})
})
)
})
function getPackageInfo(packageName, callback) {
PackageInfoCache.get(packageName, function (error, value) {
PackageInfoCache.get(packageName, function(error, value) {
if (error || value != null) {
callback(error, value === PackageNotFound ? null : value)
} else {