search: stream results from npmjs instead of buffering them

lib/config.js

@@ -100,6 +100,11 @@ function Config(config) {
     return flatten(result)
   }
 
+  // add a default rule for all packages to make writing plugins easier
+  if (self.packages['**'] == null) {
+    self.packages['**'] = {}
+  }
+
   for (var i in self.packages) {
     assert(
       typeof(self.packages[i]) === 'object' &&

lib/index-api.js

@@ -1,4 +1,3 @@
-var async         = require('async')
 var Cookies       = require('cookies')
 var express       = require('express')
 var expressJson5  = require('express-json5')
@@ -84,33 +83,57 @@ module.exports = function(config, auth, storage) {
 
   // searching packages
   app.get('/-/all/:anything?', function(req, res, next) {
-    storage.search(req.param.startkey || 0, {req: req}, function(err, result) {
-      if (err) return next(err)
-      async.eachSeries(Object.keys(result), function(pkg, cb) {
-        auth.allow_access(pkg, req.remote_user, function(err, allowed) {
-          if (err) {
-            if (err.status && String(err.status).match(/^4\d\d$/)) {
-              // auth plugin returns 4xx user error,
-              // that's equivalent of !allowed basically
-              allowed = false
-            } else {
-              return cb(err)
-            }
-          }
+    var received_end      = false
+    var response_finished = false
+    var processing_pkgs   = 0
 
-          if (!allowed) delete result[pkg]
-          cb()
-        })
-      }, function(err) {
-        if (err) return next(err)
-        next(result)
+    res.status(200)
+    res.write('{"_updated":' + Date.now());
+
+    var stream = storage.search(req.param.startkey || 0, { req: req })
+
+    stream.on('data', function each(pkg) {
+      processing_pkgs++
+
+      auth.allow_access(pkg.name, req.remote_user, function(err, allowed) {
+        processing_pkgs--
+
+        if (err) {
+          if (err.status && String(err.status).match(/^4\d\d$/)) {
+            // auth plugin returns 4xx user error,
+            // that's equivalent of !allowed basically
+            allowed = false
+          } else {
+            stream.abort(err)
+          }
+        }
+
+        if (allowed) {
+          res.write(',\n' + JSON.stringify(pkg.name) + ':' + JSON.stringify(pkg))
+        }
+
+        check_finish()
       })
     })
-  })
 
-  //app.get('/*', function(req, res) {
-  //  proxy.request(req, res)
-  //})
+    stream.on('error', function (_err) {
+      res.socket.destroy()
+    })
+
+    stream.on('end', function () {
+      received_end = true
+      check_finish()
+    })
+
+    function check_finish() {
+      if (!received_end) return
+      if (processing_pkgs) return
+      if (response_finished) return
+
+      response_finished = true
+      res.end('}\n')
+    }
+  })
 
   // placeholder 'cause npm require to be authenticated to publish
   // we do not do any real authentication yet

lib/index.js

@@ -58,18 +58,6 @@ module.exports = function(config_hash) {
     next()
   })
 
-/*  app.get('/-/all', function(req, res) {
-    var https = require('https')
-    var JSONStream = require('JSONStream')
-    var request = require('request')({
-      url: 'https://registry.npmjs.org/-/all',
-    })
-    .pipe(JSONStream.parse('*'))
-    .on('data', function(d) {
-      console.log(d)
-    })
-  })*/
-
   // hook for tests only
   if (config._debug) {
     app.get('/-/_debug', function(req, res, next) {

lib/local-storage.js

@@ -1,8 +1,10 @@
 var assert     = require('assert')
+var async      = require('async')
 var Crypto     = require('crypto')
 var fs         = require('fs')
 var Error      = require('http-errors')
 var Path       = require('path')
+var Stream     = require('readable-stream')
 var URL        = require('url')
 var fs_storage = require('./local-fs')
 var Logger     = require('./logger')
@@ -482,35 +484,55 @@ Storage.prototype.get_package = function(name, options, callback) {
   })
 }
 
-Storage.prototype.get_recent_packages = function(startkey, callback) {
+// walks through each package and calls `on_package` on them
+Storage.prototype._each_package = function (on_package, on_end) {
   var self = this
-  var i = 0
-  var list = []
+  var storages = {}
 
-  var storage = self.storage('')
-  if (!storage) return callback(null, [])
+  storages[self.config.storage] = true
 
-  fs.readdir(storage.path, function(err, files) {
-    if (err) return callback(null, [])
-
-    var filesL = files.length
-
-    files.forEach(function(file) {
-      fs.stat(storage.path, function(err, stats) {
-        if (err) return callback(err)
-        if (stats.mtime > startkey && Utils.validate_name(file)) {
-          list.push({
-            time: stats.mtime,
-            name: file
-          })
-        }
-        if (++i !== filesL) {
-          return false
-        }
-        return callback(null, list)
-      })
+  if (self.config.packages) {
+    Object.keys(self.packages || {}).map(function (pkg) {
+      if (self.config.packages[pkg].storage) {
+        storages[self.config.packages[pkg].storage] = true
+      }
     })
-  })
+  }
+
+  var base = Path.dirname(self.config.self_path);
+
+  async.eachSeries(Object.keys(storages), function (storage, cb) {
+    fs.readdir(Path.resolve(base, storage), function (err, files) {
+      if (err) return cb(err)
+
+      async.eachSeries(files, function (file, cb) {
+        if (file.match(/^@/)) {
+          // scoped
+          fs.readdir(Path.resolve(base, storage, file), function (err, files) {
+            if (err) return cb(err)
+
+            async.eachSeries(files, function (file2, cb) {
+              if (Utils.validate_name(file2)) {
+                on_package({
+                  name: file + '/' + file2,
+                  path: Path.resolve(base, storage, file, file2),
+                }, cb)
+              } else {
+                cb()
+              }
+            }, cb)
+          })
+        } else if (Utils.validate_name(file)) {
+          on_package({
+            name: file,
+            path: Path.resolve(base, storage, file)
+          }, cb)
+        } else {
+          cb()
+        }
+      }, cb)
+    })
+  }, on_end)
 }
 
 //
@@ -565,6 +587,55 @@ Storage.prototype.update_package = function(name, updateFn, _callback) {
   })
 }
 
+Storage.prototype.search = function(startkey, options) {
+  var self = this
+
+  var stream = new Stream.PassThrough({ objectMode: true })
+
+  self._each_package(function on_package(item, cb) {
+    fs.stat(item.path, function(err, stats) {
+      if (err) return cb(err)
+
+      if (stats.mtime > startkey) {
+        self.get_package(item.name, options, function(err, data) {
+          if (err) return cb(err)
+
+          var versions = Utils.semver_sort(Object.keys(data.versions))
+          var latest = versions[versions.length - 1]
+
+          if (data.versions[latest]) {
+            stream.push({
+              name           : data.versions[latest].name,
+              description    : data.versions[latest].description,
+              'dist-tags'    : { latest: latest },
+              maintainers    : data.versions[latest].maintainers ||
+                                 [ data.versions[latest]._npmUser ].filter(Boolean),
+              author         : data.versions[latest].author,
+              repository     : data.versions[latest].repository,
+              readmeFilename : data.versions[latest].readmeFilename || '',
+              homepage       : data.versions[latest].homepage,
+              keywords       : data.versions[latest].keywords,
+              bugs           : data.versions[latest].bugs,
+              license        : data.versions[latest].license,
+              time           : { modified: item.time ? new Date(item.time).toISOString() : undefined },
+              versions       : {},
+            })
+          }
+
+          cb()
+        })
+      } else {
+        cb()
+      }
+    })
+  }, function on_end(err) {
+    if (err) return stream.emit('error', err)
+    stream.end()
+  })
+
+  return stream
+}
+
 Storage.prototype._normalize_package = function(pkg) {
   ;['versions', 'dist-tags', '_distfiles', '_attachments', '_uplinks'].forEach(function(key) {
     if (!Utils.is_object(pkg[key])) pkg[key] = {}

lib/storage.js

@@ -1,6 +1,7 @@
 var assert    = require('assert')
 var async     = require('async')
 var Error     = require('http-errors')
+var Stream    = require('stream')
 var Local     = require('./local-storage')
 var Logger    = require('./logger')
 var MyStreams = require('./streams')
@@ -328,86 +329,49 @@ Storage.prototype.get_package = function(name, options, callback) {
 //
 // Retrieve remote and local packages more recent than {startkey}
 //
-// Function invokes uplink.request for npm and local.get_recent_packages for
-// local ones then sum up the result in a json object
+// Function streams all packages from all uplinks first, and then
+// local packages.
+//
+// Note that local packages could override registry ones just because
+// they appear in JSON last. That's a trade-off we make to avoid
+// memory issues.
 //
 // Used storages: local && uplink (proxy_access)
 //
-Storage.prototype.search = function(startkey, options, callback) {
+Storage.prototype.search = function(startkey, options) {
   var self = this
-  var uplinks = []
-  var i = 0
 
-  var uplinks
-  for (var p in self.uplinks) {
-    uplinks.push(p)
-  }
+  var stream = new Stream.PassThrough({ objectMode: true })
 
-  function merge_with_local_packages(err, res, body) {
-    if (err) return callback(err)
-    var j = 0
+  async.eachSeries(Object.keys(self.uplinks), function(up_name, cb) {
+    // shortcut: if `local=1` is supplied, don't call uplinks
+    if (options.req.query.local !== undefined) return cb()
 
-    self.local.get_recent_packages(startkey, function(err, list) {
-      if (err) return callback(err)
-
-      var listL = list.length
-
-      if (!listL) return callback(null, body)
-
-      list.forEach(function(item) {
-        self.local.get_package(item.name, options, function(err, data) {
-          if (err) return callback(err)
-
-          var versions = Utils.semver_sort(Object.keys(data.versions))
-          var latest = versions[versions.length - 1]
-
-          if (data.versions[latest]) {
-            body[item.name] = {
-              name          : data.versions[latest].name,
-              description   : data.versions[latest].description,
-              'dist-tags'   : { latest: latest },
-              maintainers   : data.versions[latest].maintainers || [data.versions[latest]._npmUser].filter(Boolean),
-              readmeFilename: data.versions[latest].readmeFilename || '',
-              time          : {
-                modified: new Date(item.time).toISOString()
-              },
-              versions      : {},
-              repository    : data.versions[latest].repository,
-              keywords      : data.versions[latest].keywords
-            }
-            body[item.name].versions[latest] = 'latest'
-          }
-
-          if (++j !== listL) {
-            return false
-          }
-
-          return callback(null, body)
-        })
-      })
+    var lstream = self.uplinks[up_name].search(startkey, options)
+    lstream.pipe(stream, { end: false })
+    lstream.on('error', function (err) {
+      self.logger.error({ err: err }, 'uplink error: @{err.message}')
+      cb(), cb = function () {}
+    })
+    lstream.on('end', function () {
+      cb(), cb = function () {}
     })
-  }
 
-  function remote_search() {
-    var uplink = self.uplinks[uplinks[i]]
-    if (options.req.query.local !== undefined || !uplink) {
-      return merge_with_local_packages(null, null, {})
+    stream.abort = function () {
+      if (lstream.abort) lstream.abort()
+      cb(), cb = function () {}
     }
-    self.uplinks[uplinks[i]].request({
-      uri     : options.req.url,
-      timeout : self.uplinks[p].timeout,
-      json    : true,
-      req     : options.req,
-    }, function(err, res, body) {
-      if (err || Math.floor(res.statusCode / 100) > 3) {
-        i++
-        return remote_search()
-      }
-      return merge_with_local_packages(err, res, body)
+  }, function () {
+    var lstream = self.local.search(startkey, options)
+    stream.abort = function () { lstream.abort() }
+    lstream.pipe(stream, { end: true })
+    lstream.on('error', function (err) {
+      self.logger.error({ err: err }, 'search error: @{err.message}')
+      stream.end()
     })
-  }
+  })
 
-  remote_search()
+  return stream
 }
 
 Storage.prototype.get_local = function(callback) {

lib/up-storage.js

@@ -1,6 +1,7 @@
+var JSONStream     = require('JSONStream')
 var Error          = require('http-errors')
 var request        = require('request')
-var Stream         = require('stream')
+var Stream         = require('readable-stream')
 var URL            = require('url')
 var parse_interval = require('./config').parse_interval
 var Logger         = require('./logger')
@@ -320,6 +321,44 @@ Storage.prototype.get_url = function(url) {
   return stream
 }
 
+Storage.prototype.search = function(startkey, options) {
+  var self = this
+
+  var stream = new Stream.PassThrough({ objectMode: true })
+
+  var req = self.request({
+    uri: options.req.url,
+    req: options.req,
+  })
+
+  req.on('response', function (res) {
+    if (!String(res.statusCode).match(/^2\d\d$/)) {
+      return stream.emit('error', Error('bad status code ' + res.statusCode + ' from uplink'))
+    }
+
+    res.pipe(JSONStream.parse('*')).on('data', function (pkg) {
+      if (Utils.is_object(pkg)) {
+        stream.emit('data', pkg)
+      }
+    })
+
+    res.on('end', function () {
+      stream.emit('end')
+    })
+  })
+
+  req.on('error', function (err) {
+    stream.emit('error', err)
+  })
+
+  stream.abort = function () {
+    req.abort()
+    stream.emit('end')
+  }
+
+  return stream
+}
+
 Storage.prototype._add_proxy_headers = function(req, headers) {
   if (req) {
     headers['X-Forwarded-For'] = (

package.yaml

@@ -39,11 +39,15 @@ dependencies:
   lunr: '>=0.5.2 <1.0.0-0'
   render-readme: '>=0.2.1'
   jju: '1.x'
+  JSONStream: '1.x'
 
   mkdirp: '>=0.3.5 <1.0.0-0'
   sinopia-htpasswd: '>= 0.4.3'
   http-errors: '>=1.2.0'
 
+  # node 0.10 compatibility, should go away soon
+  readable-stream: '~1.1.0'
+
 optionalDependencies:
   # those are native modules that could fail to compile
   # and unavailable on windows

test/functional/newnpmreg.js

@@ -89,11 +89,13 @@ module.exports = function() {
         assert.deepEqual(obj['testpkg-newnpmreg'],
           { name: 'testpkg-newnpmreg',
             description: '',
+            author: '',
+            license: 'ISC',
             'dist-tags': { latest: '0.0.0' },
             maintainers: [ { name: 'alex', email: 'alex@kocharin.ru' } ],
             readmeFilename: '',
             time: { modified: '2014-10-02T07:07:51.000Z' },
-            versions: { '0.0.0': 'latest' },
+            versions: {},
             repository: { type: 'git', url: '' } })
       }