Get the original headers from a Node HTTP request.

node_original_headers.js

var http = require('http')

http.createServer(function (req, res) {
  console.log('Original Headers:', req.socket._originalHeaders)
  console.log('Messed up Headers:', req.headers)
  res.end('BINGO')
})
  .on('connection', function (socket) {
    if (!socket.parser._onHeadersComplete)
      socket.parser._onHeadersComplete = socket.parser.onHeadersComplete
    socket.parser.onHeadersComplete = function (headers) {
      socket._originalHeaders = {}
      for (var i = 0; i < headers.headers.length; i += 2) {
        socket._originalHeaders[headers.headers[i]] = headers.headers[i+1]
      }
      return this._onHeadersComplete.apply(this, arguments)
    }
  })
  .listen(1337)