Question

我正在使用标准的HttpWebRequest获取html页面：

using System;
using System.IO;
using System.Net;

namespace TestConsole.Classes {
    class RequestHeadersOrder {
        public void Test() {
            var req = (HttpWebRequest)WebRequest.Create("https://www.google.com");
            req.Proxy = new WebProxy("localhost", 8888); // for debug in Fiddler proxy (https://www.telerik.com/fiddler)
            req.Host = "www.google.com";
            req.UserAgent = "Robot-tester";
            req.Accept = "*/*";
            req.Headers.Add(HttpRequestHeader.AcceptLanguage, "en-US");
            req.Headers.Add(HttpRequestHeader.AcceptEncoding, "gzip, deflate");
            req.AutomaticDecompression = DecompressionMethods.Deflate | DecompressionMethods.GZip;
            string html;
            using (var resp = req.GetResponse())
            using (var respStream = resp.GetResponseStream())
            using (var ms = new MemoryStream()) {
                respStream.CopyTo(ms);
                html = System.Text.Encoding.UTF8.GetString(ms.ToArray());
            }
            Console.WriteLine(html);
        }
    }
}

这将产生请求标头（原始格式）：

GET https://www.google.com/ HTTP/1.1
User-Agent: Robot-tester
Accept: */*
Accept-Language: en-US
Accept-Encoding: gzip, deflate
Host: www.google.com
Connection: Keep-Alive

但是大多数浏览器使用不同的标题顺序：首先是“主机”标题，然后是“用户代理”，然后是其他标题。所以，我需要这个：

GET https://www.google.com/ HTTP/1.1
Host: www.google.com
User-Agent: Robot-tester
Accept: */*
Accept-Language: en-US
Accept-Encoding: gzip, deflate
Connection: Keep-Alive

请告诉我如何首先放置“主机”标题。这对于某些网站很重要。

如何首先放置HttpWebRequest主机标头？

0 个答案: