Question

I’m trying to encode an image using base64 in Node.JS to pass along to the PostageApp API as an attachment. I thought I had it working but it attaches a 1K file that isn’t exactly what I was looking for.

Here’s my code:

 var base64data;

 fs.readFile(attachment, function(err, data) {
   base64data = new Buffer(data).toString('base64');
 });

And here’s the part of the API call I am making:

 attachments: {
   "attachment.txt" : {
     content_type: "application/octet-stream",
     content: base64data
   },
 }

I’m a bit lost, not being so great with Node, but I thought it would work. Any help would be appreciated!

Answer 1

fs.readFile(attachment, function(err, data) {
   var base64data = new Buffer(data).toString('base64');
   [your API call here]
});

It takes some time until the results are there, so by the time you’ve got the data, the outer scopes execution is already over.