Sendgrid inbound webhook with node and multer

Question

I'm trying to store emails from sendgrid via the inbound webhook using node, express and multer. There is an example on sendgrids site as below:

var express = require('express');
var multer  = require('multer');
var upload = multer();
var app = express();

app.configure(function(){
  app.set('port', process.env.PORT || 3000);
  app.use(multer());
});
app.post('/parse', upload.array('files', 3) function (req, res) {
  var from = req.body.from;
  var text = req.body.text;
  var subject = req.body.subject;
  var num_attachments = req.body.attachments;
  for (i = 1; i <= num_attachments; i++){
    var attachment = req.files['attachment' + i];
    // attachment will be a File object
  }
});

var server = app.listen(app.get('port'), function() {
  console.log('Listening on port %d', server.address().port);
});

This code throws an error when an email with an attachment is sent. The error is "unexpected field". I assume that the declaration for array.upload("files",3) is where the issue lies. Has anybody solved this?

Answer 1

You can solve this by using .any() when you don't the field name (see documentation for any()

Here's an example code

app.post('/parse', upload.any() function (req, res) {
  var from = req.body.from;
  var text = req.body.text;
  var subject = req.body.subject;
  var num_attachments = req.body.attachments;
  for (i = 1; i <= num_attachments; i++){
    var attachment = req.files['attachment' + i];
    // attachment will be a File object
  }
});