echohttpserver.py

# -*- coding:utf-8 -*-
import SimpleHTTPServer
import BaseHTTPServer

class EchoHttpRequestHandler(SimpleHTTPServer.SimpleHTTPRequestHandler):
    def parse_request(self):
        print("----------------------------------------")
        print(self.raw_requestline)
        result = SimpleHTTPServer.SimpleHTTPRequestHandler.parse_request(self)
        print(self.headers)
        print("----------------------------------------")
        return result


if __name__ == '__main__':
    HandlerClass = EchoHttpRequestHandler
    HandlerClass.protocol_version = "HTTP/1.0"
    ServerClass = BaseHTTPServer.HTTPServer
    server = ServerClass(("", 8000), HandlerClass)
    server.serve_forever()

HttpClientSample.cs

using System;
using System.Net.Http;
using System.Threading.Tasks;
using System.Net.Http.Headers;
namespace HttpClientSample
{
	class MainClass
	{
		public static void Main (string[] args)
		{
			Console.WriteLine ("Hello World!");

			var uri = "http://localhost:8000/a.txt";

			var client = new HttpClient ();
			client.DefaultRequestHeaders.Add ("Accept", "*/*");
			Console.WriteLine("Accept: {0}", client.DefaultRequestHeaders.Accept);

			client.DefaultRequestHeaders.Add ("Cookie", "guest_id=v1%3A139109610161149543");
			var t = Task.Run (async () => {
				using (var response = await client.GetAsync (uri).ConfigureAwait (false)) {
					var result = await response.Content.ReadAsStringAsync ();
					Console.WriteLine ("result: {0}", result);
				}
			});
			t.Wait ();
		}
	}
}

Accept: */*
Cookie: guest_id=v1%3A139109610161149543
Connection: keep-alive
Host: localhost:8000

こうなってほしいけれど。

windows側で標準で入っているdll?を使った場合にはCookieが付加されない。
mac側でnugetを追加したdllを使った場合にはCookieが付加される。(mono)