HTTPRequest标头不在Wireshark中

Question

我设置了一些HTTP请求头，如下所示：

        this.Url = new Uri(u);
        HttpWebRequest http = (HttpWebRequest)WebRequest.Create(Url);
        WebResponse response = http.GetResponse();

        //headers
        http.UserAgent = "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:17.0) Gecko/20100101 Firefox/17.0\r\n";
        http.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8\r\n";
        http.Headers.Add("Accept-Encoding", "gzip,deflate,sdch'r'n");
        http.Headers.Add("Accept-Language", "en-US,en;q=0.9\r\n");
        http.Headers.Add("Accept-Charset", "ISO-8859-1,utf-8;q=0.7,*;q=0.3\r\n");

我是这样捕捉它们的：

            for (count = 0; count < http.Headers.Keys.Count; count++)
        {
            headerKey = http.Headers.Keys[count];
            headerValue = http.Headers[headerKey];

            if (headerValue != null)
            {
                if (headerKey == null)
                {
                    requestbuffer.Append(headerValue);
                    requestbuffer.Append(Newline); 
                }
                else
                {
                    requestbuffer.Append(headerKey + ": " + headerValue);
                    requestbuffer.Append(Newline);
                }
            }
        }

当我运行测试工具时，一切似乎都很好：

• 主持人：domain.com

但是，在Wireshark和Fiddler中，仅发送以下标头：

• 获取/HTTP/1.1

知道为什么吗？

Answer 1

是的，您正在发送请求后设置标头。

试试这个：

    //headers
    http.UserAgent = "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:17.0) Gecko/20100101 Firefox/17.0\r\n";
    http.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8\r\n";
    http.Headers.Add("Accept-Encoding", "gzip,deflate,sdch'r'n");
    http.Headers.Add("Accept-Language", "en-US,en;q=0.9\r\n");
    http.Headers.Add("Accept-Charset", "ISO-8859-1,utf-8;q=0.7,*;q=0.3\r\n");

    //Added diesposal of response too
    using (WebResponse response = http.GetResponse())
    {
    }

Answer 2

您试图在调用http.GetResponse（）后添加标题。那是在请求被发送之后。将其更改为：

this.Url = new Uri(u);
HttpWebRequest http = (HttpWebRequest)WebRequest.Create(Url);

//headers
http.UserAgent = "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:17.0) Gecko/20100101 Firefox/17.0\r\n";
http.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8\r\n";
http.Headers.Add("Accept-Encoding", "gzip,deflate,sdch'r'n");
http.Headers.Add("Accept-Language", "en-US,en;q=0.9\r\n");
http.Headers.Add("Accept-Charset", "ISO-8859-1,utf-8;q=0.7,*;q=0.3\r\n");

using (WebResponse response = http.GetResponse())
{
    // Do whatever
}

（请注意，您确实应该处理响应。）