I try to implement a simple XHR upload to Node.js (via Formidable). The problem is that if I set 

xhr.setRequestHeader("Content-Type", "multipart/form-data");

node gives me error:

Error: bad content-type header, no multipart boundary

If I set boundary to just a random string nothing happens. The browser just hangs on POST and waits for server response.

The point is that if I use formidable with regular synchronous POST everything works fine.

Anyone tried to use Formidable with XHR upload?

node.js xmlhttprequest
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