Node.js: Missing header from http request

The "Content-Type" header is not being set to "application/x-thrift" when making http requests in the node.js implementation. This results in error response (status 400) for any such connections (depending on whether the server checks the header). The Python implementation for example adds the header explicitly:
https://github.com/tstanev/thrift/blob/master/lib/py/src/transport/THttpClient.py#L127