Add emailing on server exceptions

Keymetrics VC's are coming. They no longer let you see reported errors or notify you on their free tier which renders the service useless for us. This will emailing you using mandrill with a stack trace and context of the error when it receives it
FreeCodeCamp · 169c82acfc6f833a8822048fcf7cc37a4e1b19dd · BerkeleyTrue committed Jan 24, 2016 · Jan 24, 2016 · 169c82a
1 parent ea7a695
commit 169c82acfc6f833a8822048fcf7cc37a4e1b19dd
Unified Split

Showing with 72 additions and 2 deletions.

+2 −1 package.json

+57 −0 pm2Start.js

+13 −1 server/middlewares/keymetrics.js
@@ -31,11 +31,11 @@
     "babel-core": "^6.3.26",
     "babel-eslint": "^4.1.4",
     "babel-loader": "^6.2.1",
-    "babel-register": "^6.3.0",
     "babel-plugin-add-module-exports": "^0.1.2",
     "babel-preset-es2015": "^6.3.13",
     "babel-preset-react": "^6.3.13",
     "babel-preset-stage-0": "^6.3.13",
+    "babel-register": "^6.3.0",
     "body-parser": "^1.13.2",
     "chai-jquery": "^2.0.0",
     "cheerio": "~0.19.0",
@@ -94,6 +94,7 @@
     "merge-stream": "^1.0.0",
     "method-override": "^2.3.0",
     "moment": "^2.10.2",
+    "moment-timezone": "^0.5.0",
     "mongodb": "^2.0.33",
     "morgan": "^1.6.1",
     "node-uuid": "^1.4.3",
@@ -1,8 +1,22 @@
 require('dotenv').load();
 var pm2 = require('pm2');
+var nodemailer = require('nodemailer');
+var moment = require('moment-timezone');
+var _ = require('lodash');
+
 var instances = process.env.INSTANCES || 1;
 var serverName = process.env.SERVER_NAME || 'server';
 var maxMemory = process.env.MAX_MEMORY || '390M';
+var transportOptions = {
+  type: 'smtp',
+  service: 'Mandrill',
+  auth: {
+    user: process.env.MANDRILL_USER || false,
+    pass: process.env.MANDRILL_PASSWORD
+  }
+};
+
+var mailReceiver = process.env.MAIL_RECEIVER || false;
 
 pm2.connect(function() {
   pm2.start({
@@ -22,3 +36,46 @@ pm2.connect(function() {
     pm2.disconnect();
   });
 });
+
+
+if (transportOptions.auth.user && mailReceiver) {
+  console.log('setting up mailer');
+  var transporter = nodemailer.createTransport(transportOptions);
+  var compiled = _.template(
+    'An error has occurred on server ' +
+    '<% name %>\n' +
+    'Stack Trace:\n\n\n<%= stack %>\n\n\n' +
+    'Context:\n\n<%= text %>'
+  );
+
+  pm2.launchBus(function(err, bus) {
+    if (err) {
+      return console.error(err);
+    }
+    console.log('event bus connected');
+
+    bus.on('process:exception', function(data) {
+      var text;
+      var stack;
+      var name;
+      try {
+        data.date = moment(data.at || new Date())
+          .tz('America/Los_Angeles')
+          .format('MMMM Do YYYY, h:mm:ss a z');
+
+        text = JSON.stringify(data, null, 2);
+        stack = data.data.stack;
+        name = data.process.name;
+      } catch (e) {
+        return e;
+      }
+
+      transporter.sendMail({
+        to: mailReceiver,
+        from: 'team@freecodecamp.com',
+        subject: 'Server exception',
+        text: compiled({ name: name, text: text, stack: stack })
+      });
+    });
+  });
+}
@@ -4,5 +4,17 @@ export default function keymetrics() {
   if (process.env.NODE_ENV !== 'production') {
     return (err, req, res, next) => next(err);
   }
-  return pmx.expressErrorHandler();
+  return (err, req, res, next) => {
+    if (res.statusCode < 400) { res.statusCode = 500; }
+
+    err.url = req.url;
+    err.component = req.url;
+    err.action = req.method;
+    err.params = req.body;
+    err.session = req.session;
+    err.username = req.user ? req.user.username : 'anonymous';
+    err.userId = req.user ? req.user.id : 'anonymous';
+
+    return next(pmx.notify(err));
+  };
 }