mirror of
https://github.com/verdaccio/verdaccio.git
synced 2024-11-08 23:25:51 +01:00
413 lines
10 KiB
JavaScript
413 lines
10 KiB
JavaScript
var async = require('async')
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, assert = require('assert')
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, UError = require('./error').UserError
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, Local = require('./local-storage')
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, Proxy = require('./up-storage')
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, mystreams = require('./streams')
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, utils = require('./utils')
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, Logger = require('./logger')
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//
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// Implements Storage interface
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// (same for storage.js, local-storage.js, up-storage.js)
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//
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function Storage(config) {
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if (!(this instanceof Storage)) return new Storage(config)
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this.config = config
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// we support a number of uplinks, but only one local storage
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// Proxy and Local classes should have similar API interfaces
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this.uplinks = {}
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for (var p in config.uplinks) {
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this.uplinks[p] = new Proxy(config.uplinks[p], config)
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this.uplinks[p].upname = p
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}
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this.local = new Local(config)
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this.logger = Logger.logger.child()
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return this
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}
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//
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// Add a {name} package to a system
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//
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// Function checks if package with the same name is available from uplinks.
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// If it isn't, we create package locally
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//
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// Used storages: local (write) && uplinks
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//
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Storage.prototype.add_package = function(name, metadata, callback) {
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var self = this
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// NOTE:
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// - when we checking package for existance, we ask ALL uplinks
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// - when we publishing package, we only publish it to some of them
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// so all requests are necessary
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check_package_local(function(err) {
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if (err) return callback(err)
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check_package_remote(function(err) {
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if (err) return callback(err)
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publish_package(function(err) {
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if (err) return callback(err)
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callback()
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})
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})
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})
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function check_package_local(cb) {
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self.local.get_package(name, {}, function(err, results) {
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if (err && err.status !== 404) return cb(err)
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if (results) {
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return cb(new UError({
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status: 409,
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msg: 'this package is already present'
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}))
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}
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cb()
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})
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}
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function check_package_remote(cb) {
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self._sync_package_with_uplinks(name, null, {}, function(err, results, err_results) {
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// something weird
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if (err && err.status !== 404) return cb(err)
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// checking package
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if (results) {
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return cb(new UError({
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status: 409,
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msg: 'this package is already present'
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}))
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}
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for (var i=0; i<err_results.length; i++) {
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// checking error
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// if uplink fails with a status other than 404, we report failure
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if (err_results[i][0] != null) {
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if (err_results[i][0].status !== 404) {
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return cb(new UError({
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status: 503,
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msg: 'one of the uplinks is down, refuse to publish'
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}))
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}
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}
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}
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return cb()
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})
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}
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function publish_package(cb) {
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self.local.add_package(name, metadata, callback)
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}
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}
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//
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// Add a new version of package {name} to a system
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//
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// Used storages: local (write)
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//
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Storage.prototype.add_version = function(name, version, metadata, tag, callback) {
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return this.local.add_version(name, version, metadata, tag, callback)
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}
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//
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// Tags a package version with a provided tag
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//
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// Used storages: local (write)
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//
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Storage.prototype.add_tag = function(name, version, tag, callback) {
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return this.local.add_tag(name, version, tag, callback)
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}
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//
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// Change an existing package (i.e. unpublish one version)
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//
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// Function changes a package info from local storage and all uplinks with
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// write access.
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//
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// Used storages: local (write)
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//
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Storage.prototype.change_package = function(name, metadata, revision, callback) {
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return this.local.change_package(name, metadata, revision, callback)
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}
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//
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// Remove a package from a system
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//
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// Function removes a package from local storage
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//
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// Used storages: local (write)
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//
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Storage.prototype.remove_package = function(name, callback) {
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return this.local.remove_package(name, callback)
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}
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//
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// Remove a tarball from a system
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//
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// Function removes a tarball from local storage.
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// Tarball in question should not be linked to in any existing
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// versions, i.e. package version should be unpublished first.
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//
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// Used storages: local (write)
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//
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Storage.prototype.remove_tarball = function(name, filename, revision, callback) {
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return this.local.remove_tarball(name, filename, revision, callback)
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}
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//
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// Upload a tarball for {name} package
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//
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// Function is syncronous and returns a WritableStream
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//
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// Used storages: local (write)
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//
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Storage.prototype.add_tarball = function(name, filename) {
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return this.local.add_tarball(name, filename)
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}
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//
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// Get a tarball from a storage for {name} package
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//
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// Function is syncronous and returns a ReadableStream
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//
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// Function tries to read tarball locally, if it fails then it reads package
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// information in order to figure out where we can get this tarball from
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//
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// Used storages: local || uplink (just one)
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//
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Storage.prototype.get_tarball = function(name, filename) {
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var stream = new mystreams.ReadTarballStream()
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stream.abort = function() {}
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var self = this
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// if someone requesting tarball, it means that we should already have some
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// information about it, so fetching package info is unnecessary
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// trying local first
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var rstream = self.local.get_tarball(name, filename)
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var is_open = false
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rstream.on('error', function(err) {
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if (is_open || err.status !== 404) {
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return stream.emit('error', err)
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}
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// local reported 404
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var err404 = err
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var uplink = null
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rstream.abort()
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rstream = null // gc
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self.local.get_package(name, function(err, info) {
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if (!err && info._distfiles && info._distfiles[filename] != null) {
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// information about this file exists locally
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serve_file(info._distfiles[filename])
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} else {
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// we know nothing about this file, trying to get information elsewhere
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self._sync_package_with_uplinks(name, info, {}, function(err, info) {
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if (err) return stream.emit('error', err)
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if (!info._distfiles || info._distfiles[filename] == null) {
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return stream.emit('error', err404)
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}
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serve_file(info._distfiles[filename])
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})
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}
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})
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})
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rstream.on('open', function() {
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is_open = true
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rstream.pipe(stream)
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})
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return stream
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function serve_file(file) {
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var uplink = null
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for (var p in self.uplinks) {
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if (self.uplinks[p].can_fetch_url(file.url)) {
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uplink = self.uplinks[p]
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}
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}
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if (uplink == null) {
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uplink = new Proxy({
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url: file.url,
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_autogenerated: true,
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}, self.config)
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}
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var savestream = self.local.add_tarball(name, filename)
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savestream.on('error', function(err) {
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savestream.abort()
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stream.emit('error', err)
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})
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savestream.on('open', function() {
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var rstream2 = uplink.get_url(file.url)
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rstream2.on('error', function(err) {
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savestream.abort()
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stream.emit('error', err)
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})
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rstream2.on('end', function() {
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savestream.done()
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})
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// XXX: check, what would happen if client disconnects?
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rstream2.pipe(stream)
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rstream2.pipe(savestream)
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})
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}
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}
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//
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// Retrieve a package metadata for {name} package
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//
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// Function invokes local.get_package and uplink.get_package for every
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// uplink with proxy_access rights against {name} and combines results
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// into one json object
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//
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// Used storages: local && uplink (proxy_access)
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//
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Storage.prototype.get_package = function(name, options, callback) {
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if (typeof(options) === 'function') callback = options, options = {}
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var self = this
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self.local.get_package(name, options, function(err, data) {
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if (err && (!err.status || err.status >= 500)) {
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// report internal errors right away
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return callback(err)
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}
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self._sync_package_with_uplinks(name, data, options, function(err, result, uplink_errors) {
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if (err) return callback(err)
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var whitelist = ['_rev', 'name', 'versions', 'dist-tags']
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for (var i in result) {
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if (whitelist.indexOf(i) === -1) delete result[i]
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}
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result['dist-tags'].latest = utils.semver_sort(Object.keys(result.versions))
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for (var i in result['dist-tags']) {
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if (Array.isArray(result['dist-tags'][i])) {
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result['dist-tags'][i] = result['dist-tags'][i][result['dist-tags'][i].length-1]
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if (result['dist-tags'][i] == null) delete result['dist-tags'][i]
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}
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}
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// npm can throw if this field doesn't exist
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result._attachments = {}
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callback(null, result, uplink_errors)
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})
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})
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}
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// function fetches package information from uplinks and synchronizes it with local data
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// if package is available locally, it MUST be provided in pkginfo
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// returns callback(err, result, uplink_errors)
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Storage.prototype._sync_package_with_uplinks = function(name, pkginfo, options, callback) {
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var self = this
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if (!pkginfo) {
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var exists = false
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pkginfo = {
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name: name,
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versions: {},
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'dist-tags': {},
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_uplinks: {},
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}
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} else {
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var exists = true
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}
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var uplinks = []
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for (var i in self.uplinks) {
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if (self.config.proxy_access(name, i)) {
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uplinks.push(self.uplinks[i])
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}
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}
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async.map(uplinks, function(up, cb) {
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var _options = Object.create(options)
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if (utils.is_object(pkginfo._uplinks[up.upname]))
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_options.etag = pkginfo._uplinks[up.upname].etag
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up.get_package(name, _options, function(err, up_res, etag) {
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if (err || !up_res) return cb(null, [err || new Error('no data')])
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try {
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utils.validate_metadata(up_res, name)
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} catch(err) {
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self.logger.error({
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sub: 'out',
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err: err,
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}, 'package.json validating error @{!err.message}\n@{err.stack}')
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return cb(null, [err])
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}
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pkginfo._uplinks[up.upname] = {
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etag: etag
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}
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try {
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Storage._merge_versions(pkginfo, up_res)
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} catch(err) {
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self.logger.error({
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sub: 'out',
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err: err,
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}, 'package.json parsing error @{!err.message}\n@{err.stack}')
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return cb(null, [err])
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}
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// if we got to this point, assume that the correct package exists
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// on the uplink
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exists = true
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cb()
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})
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}, function(err, uplink_errors) {
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assert(!err && Array.isArray(uplink_errors))
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if (!exists) {
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return callback(new UError({
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status: 404,
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msg: 'no such package available'
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}), null, uplink_errors)
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}
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self.local.update_versions(name, pkginfo, function(err, pkginfo) {
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if (err) return callback(err)
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return callback(null, pkginfo, uplink_errors)
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})
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})
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}
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// function gets a local info and an info from uplinks and tries to merge it
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// exported for unit tests only
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Storage._merge_versions = function(local, up) {
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// copy new versions to a cache
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// NOTE: if a certain version was updated, we can't refresh it reliably
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for (var i in up.versions) {
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if (local.versions[i] == null) {
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local.versions[i] = up.versions[i]
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}
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}
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// refresh dist-tags
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for (var i in up['dist-tags']) {
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utils.tag_version(local, up['dist-tags'][i], i)
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}
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}
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module.exports = Storage
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