Turn errors from scripts and extensions into faults

lib/extension-wrapper.js

@@ -0,0 +1,62 @@
+/**
+ * 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/>.
+ */
+"use strict";
+
+const jobs = new Set();
+const fileName = process.argv[2];
+let script;
+
+function errorToFault(err) {
+  if (!err)
+    return null;
+
+  return {
+    code: `ext.${err.name}`,
+    message: err.message,
+    detail: {
+      name: err.name,
+      message: err.message,
+      stack: err.stack
+    }
+  }
+}
+
+process.on("uncaughtException", function(err) {
+  let fault = errorToFault(err);
+  jobs.forEach(function(jobId) {
+    process.send([jobId, fault]);
+  });
+  jobs.clear();
+  process.disconnect();
+});
+
+process.on("message", function(message) {
+  jobs.add(message[0]);
+
+  if (!script) {
+    let cwd = process.env["GENIEACS_CONFIG_DIR"] + "/ext";
+    process.chdir(cwd);
+    script = require(`${cwd}/${fileName}`);
+  }
+
+  script[message[1][0]](message[1].slice(1), function(err, res) {
+    if (!jobs.delete(message[0]))
+      return;
+
+    process.send([message[0], errorToFault(err), res]);
+  });
+});