Initial implementation of user extensions

lib/extensions.coffee

@@ -0,0 +1,55 @@
+###
+# Copyright 2013-2016  Zaid Abdulla
+#
+# GenieACS is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as
+# published by the Free Software Foundation, either version 3 of the
+# License, or (at your option) any later version.
+#
+# GenieACS is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with GenieACS.  If not, see <http://www.gnu.org/licenses/>.
+###
+
+childProcess = require 'child_process'
+crypto = require 'crypto'
+path = require 'path'
+
+config = require './config'
+
+
+TIMEOUT = 5000
+
+processes = {}
+queue = {}
+
+messageHandler = (message) ->
+  func = queue[message[0]]
+  delete queue[message[0]]
+  func(null, message[1])
+
+
+run = (args, callback) ->
+  scriptName = args[0]
+  if not processes[scriptName]?
+    cwd = path.resolve(config.get('CONFIG_DIR'), 'extensions')
+    p = childProcess.fork('lib/extension-wrapper', [cwd, scriptName])
+    p.on('message', messageHandler)
+    processes[scriptName] = p
+
+  id = crypto.randomBytes(8).toString('hex')
+  queue[id] = callback
+  setTimeout(() ->
+    if id of queue
+      delete queue[id]
+      return callback(new Error('Extension timeout'))
+  , TIMEOUT)
+
+  processes[scriptName].send([id, args.slice(1)])
+
+
+exports.run = run