# File lib/webmock/http_lib_adapters/httpclient.rb, line 96
  def build_request_signature(req)
    uri = WebMock::Util::URI.heuristic_parse(req.header.request_uri.to_s)
    uri.query_values = req.header.request_query if req.header.request_query
    uri.port = req.header.request_uri.port
    uri = uri.omit(:userinfo)

    auth = www_auth.basic_auth
    auth.challenge(req.header.request_uri, nil)
    
    headers = req.header.all.inject({}) do |headers, header| 
      headers[header[0]] ||= [];
      headers[header[0]] << header[1]
      headers
    end

    if (auth_cred = auth.get(req)) && auth.scheme == 'Basic'
      userinfo = WebMock::Util::Headers.decode_userinfo_from_header(auth_cred)
      userinfo = WebMock::Util::URI.encode_unsafe_chars_in_userinfo(userinfo)
      headers.reject! {|k,v| k =~ /[Aa]uthorization/ && v =~ /^Basic / } #we added it to url userinfo
      uri.userinfo = userinfo
    end

    request_signature = WebMock::RequestSignature.new(
      req.header.request_method.downcase.to_sym,
      uri.to_s,
      :body => req.body.content,
      :headers => headers
    )
  end