WebBrowser如何 User-Agent 、referer 等header信息？

Question

WebBrowser如何 User-Agent 、referer 等header信息？
我搜到一些资料，说是可以通过WebBrowser_BeforeNavigate2修改，但我还是改不了：




using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace postWebBrower
{
    public partial class Form1 : Form
    {
        Boolean isSurePost;
        SHDocVw.WebBrowser wb;
        public Form1()
        {
            InitializeComponent();
            webBrowser1.Navigate("http://www.baidu.com");
           
            wb = (SHDocVw.WebBrowser)webBrowser1.ActiveXInstance;
            wb.BeforeNavigate2 += new SHDocVw.DWebBrowserEvents2_BeforeNavigate2EventHandler(WebBrowser_BeforeNavigate2);
          
        }

        private void Go_Click(object sender, EventArgs e)
        {
            webBrowser1.Navigate(url.Text);
        }


        private void webBrowser1_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
        {

        }

        private void webBrowser1_LocationChanged(object sender, EventArgs e)
        {
        }

        private void webBrowser1_Navigating(object sender, WebBrowserNavigatingEventArgs e)
        {
         
   

            Console.WriteLine(((WebBrowser)sender).Url);
            Console.WriteLine(webBrowser1.Url);
            Console.WriteLine((wb.LocationURL));

        }

        private void WebBrowser_BeforeNavigate2(object pDisp, ref object URL, ref object Flags,ref object TargetFrameName, ref object PostData, ref object Headers, ref bool Cancel)
        {

            Console.WriteLine("wb url:"+URL);
            Console.WriteLine("Headers:" + Headers); //获取不了完整的headers头？
              string postDataText = System.Text.Encoding.ASCII.GetString(PostData as byte[]);
              Console.WriteLine(postDataText);
            Console.WriteLine("datas:");
     
        }
    }
}

Answer 1

我觉得你应该是不能在BeforeNavigate2事件里面改变Headers，因为这个Headers应该是AdditionalHeaders，而不是整个IE发送出去的Http Header。

 

这个AdditionalHeaders是通过WebBrowser.Navigate(
    Uri url,
    string targetFrameName,
    byte[] postData,
    string additionalHeaders
)传递的。

 

另外，我并不觉得WebBrowser控件提供了接口让你修改User-Agent、referer这些信息：

1. 很多网站都依赖User-Agent来执行一些脚本操作
2. Referer是Http协议里面定义好的，根据Web服务器的Http响应而生成的。

如果要修改的话，你只能自己编码生成一个Http数据包，就像WebClient类那样。

Answer 2

问题没有解决，顶

Answer 3

DISPID_AMBIENT_USERAGENT

WebBrowser Customization

Answer 4

没有更简单的方法吗？？

Answer 5

Sheng Jiang (蒋晟) 写:

DISPID_AMBIENT_USERAGENT WebBrowser Customization

 

根据MSDN的Knowledge Base里面的描述，好像用DISPID_AMBIENT_USERAGENT也不行的：

 

http://support.microsoft.com/kb/183412

 

MSHTML will also ask for a new user agent via DISPID_AMBIENT_USERAGENT when navigating to clicked hyperlinks. This ambient property can be overridden, but it is not used when programmatically calling the Navigate method; it will also not cause the userAgent property of the DOM's navigator object or clientInformation behavior to be altered - this property will always reflect Internet Explorer's own UserAgent string.