Discard bad HTTP headers in Net::HTTP.

net_http_hacked.rb

# Based on 1.9.2. Works in 1.8.7 too, though
module Net
  class HTTP
    @skip_bad_headers = false

    class << self
      def skip_bad_headers
        @skip_bad_headers
      end

      def skip_bad_headers=(value)
        @skip_bad_headers = value
      end
    end
  end

  class << HTTPResponse
    def each_response_header(sock)
      key = value = nil
      while true
        line = sock.readuntil("\n", true).sub(/\s+\z/, '')
        break if line.empty?
        if line[0] == ?\s or line[0] == ?\t and value
          value << ' ' unless value.empty?
          value << line.strip
        else
          tmp_key, tmp_value = line.strip.split(/\s*:\s*/, 2)
          next if tmp_value.nil? && Net::HTTP.skip_bad_headers

          yield key, value if key

          key   = tmp_key
          value = tmp_value
          raise HTTPBadResponse, 'wrong header line format' if value.nil?
        end
      end
      yield key, value if key
    end
  end
end

request.rb

require 'net_http_hacked'
# WHM is notorious for putting random STDOUT
# in their API output. This ignores it, but resets 
# Net::HTTP to its default behavior after the request
begin
  Net::HTTP.skip_bad_headers = true
  http = Net::HTTP.new(uri.host, uri.port)
  # ......
ensure
  Net::HTTP.skip_bad_headers = false
end