RE: header key/value option

Maybe something like this ...

``` javascript`
...
if (typeof(options.header) === 'object') {
for (key in options.header) {
header += key + ': ' options.header[key] + '\r\n'
}
} else if (typeof(options.header) === 'string') {
header = options.header
} else {
...

@alexindigo Was this comment answered somewhere ? I'm currently in the middle of this nightmare.

@Marsup too bad to hear FormData is failing you. Can you describe your situation? Maybe together we can figure out something.

@alexindigo I need to add custom headers to each part I append, this snippet of code would make this possible it seems.

This snippet only saves you one loop and if you came all the way to generate your own boundaries and pretty much to reimplement logic of the whole function, you can pass your custom headers as string with no greater complexity. Right? Or did I miss something?

I want to add a file, so let form-data do its work on boundary, filename, mime etc... But I also want to add a few headers. Maybe this snippet is not perfect but the 1st "if" would probably solve this if put after (currently line 162).

I mean, can you provide your code for better understanding, why this example doesn't work for you.

var FormData = require('form-data');
var form = new FormData();

var options = {
  header: FormData.LINE_BREAK + '--' + form.getBoundary() + FormData.LINE_BREAK + 'X-Custom-Header: 123' + FormData.LINE_BREAK + FormData.LINE_BREAK
};

form.append('my_thing', theThing, options);

I'd have to recreate the whole Content-Disposition, Content-Type, name, filename, for that I'd have to add mime as direct dependency and basically copy most of _multiPartHeader, this doesn't make sense.

Isn't this much clearer this way ?

var FormData = require('form-data');
var form = new FormData();

var options = {
  header: {
    'X-Custom-Header': 123
  }
};

form.append('my_thing', theThing, options);

Yes, you're right. This is legit issue. Let me see what I can do. Idea was to freeze new features while packing everything for 1.0 release. I'll get back to you soon.

@alexindigo Would a PR help ?