Node.JS - Encoding images in base64 using Buffer

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.

Answer 2

Just specify "base64" as the encoding. Per the docs:

If no encoding is specified, then the raw buffer is returned.

fs.readFile(attachment, {encoding: 'base64'}, function(err, base64data) {    [your API call here] });