c# - 使用 Watin 更改 IE 实例的代理设置

Question

我知道我可以更改计算机的全局代理设置，Software\\Microsoft\\Windows\\CurrentVersion\\Internet Settings，以影响使用 Watin 创建的 IE 实例.

但是有什么办法可以拦截IE浏览器发出的请求并通过代理运行它们呢？我的目标是运行多个 IE 实例，每个实例都有自己的代理，这对于我上面的当前解决方案是不可能的。

Answer 1

WatiN IE 创建多个 ProcessIDs(单个实例 IE 创建多个进程 ID)。为了使用 Fiddler Core 覆盖 WatiN 的代理设置，我们需要获取所有由 WatiN IE 创建的子进程 ID。 Helper 类可以在这里找到 PInvoke: Getting all child handles of window – Svett Ralchev类(class)。然后我们检查 BeforeRequest 事件中的所有进程 ID，并等待 watin 进程 ID 覆盖代理设置。

    private void FiddlerApplication_BeforeRequest(Session sess)
    {
        //Debug.WriteLine("FiddlerApplication_BeforeRequest: " + sess.LocalProcessID.ToString());
        if (WatinIEprocessHolder.ContainsKey(sess.LocalProcessID))
        {                
            //see http://stackoverflow.com/questions/14284256/how-to-manually-set-upstream-proxy-for-fiddler-core
            sess["X-OverrideGateway"] = WatinIEprocessHolder[sess.LocalProcessID];
        }
    } 

可在此处下载工作测试应用程序 http://www.rentanadviser.com/downloads/WatiN-2.1.0.1196.zip

下面使用不同匿名代理的测试结果。 (ipaddress=browser.Text)

Process Ids:3852,7852,, Your IP address: 119.46.110.17, Proxy:119.46.110.17:8080
Process Ids:2508,6948,, Your IP address: 178.21.112.27, Proxy:178.21.112.27:3128
Process Ids:1348,1368,, Your IP address: 122.96.59.107, Proxy:122.96.59.107:83
Process Ids:7152,5104,, Your IP address: 136.0.16.217, Proxy:136.0.16.217:3127
Process Ids:4128,3480,, Your IP address: 198.52.199.152, Proxy:198.52.199.152:7808
Process Ids:2036,7844,, Your IP address: 122.96.59.107, Proxy:122.96.59.107:82

示例代码:

    private void this_FormClosing(object sender, FormClosingEventArgs e)
    {
        StopFiddler();
    }

    private void Form1_Load(object sender, EventArgs e)
    {
        this.FormClosing += this_FormClosing;

        ProxyHolder = new List<string>();
        ProxyHolder.Add("119.46.110.17:8080");
        ProxyHolder.Add("178.21.112.27:3128");
        ProxyHolder.Add("122.96.59.107:83");
        ProxyHolder.Add("136.0.16.217:3127");
        ProxyHolder.Add("198.52.199.152:7808");
        ProxyHolder.Add("122.96.59.107:82");

        StartFiddler();
        System.Threading.Thread.Sleep(500);

        for (var i = 0; i < ProxyHolder.Count; i++)
        {
            WhatIsMyIpThroughProxy(ProxyHolder[i]);
            Application.DoEvents();
            System.Threading.Thread.Sleep(500);
        }
        //WhatIsMyIpThroughProxy();
    }

    private Dictionary<int, string> WatinIEprocessHolder = new Dictionary<int, string>();
    private List<string> ProxyHolder = null;

    public void WhatIsMyIpThroughProxy(string ProxyIPandPort)
    {

        using (var browser = new IE(true))// we should not navigate now. Because we need process ids.
        {
            WindowHandleInfo ChildHandles = new WindowHandleInfo(browser.hWnd);
            foreach (var cHandle in ChildHandles.GetAllChildHandles())
            {
                int pid = new WatiN.Core.Native.Windows.Window(cHandle).ProcessID;
                if (WatinIEprocessHolder.ContainsKey(pid) == false)
                    WatinIEprocessHolder.Add(pid, ProxyIPandPort);
            }

            System.Text.StringBuilder processIDs = new System.Text.StringBuilder();
            foreach (var k in WatinIEprocessHolder.Keys)
            {
                processIDs.Append(k.ToString() + ",");
                //Debug.WriteLine(string.Format("{0}:{1}", k, WatinIEprocessHolder[k]));
            }

            //we got the process ids above. Navigate now.
            browser.GoTo("http://www.rentanadviser.com/en/common/tools.ashx?action=whatismyip");
            browser.WaitForComplete();

            WatinIEprocessHolder.Clear();

            System.Net.IPAddress ip;
            if (System.Net.IPAddress.TryParse(browser.Text, out ip))
            {
                Debug.WriteLine(string.Format("Process Ids:{0}, Your IP address: {1}, Proxy:{2}", processIDs.ToString(), browser.Text, ProxyIPandPort));
            }
            else
            {
                Debug.WriteLine(string.Format("Process Ids:{0}, Your IP address: {1}, Proxy:{2}", processIDs.ToString(), "Failed", ProxyIPandPort));
            }
        }
    }


    private void StartFiddler()
    {
        FiddlerApplication.BeforeRequest += FiddlerApplication_BeforeRequest;
        FiddlerApplication.Startup(8888, true, true, true);
    }

    private void StopFiddler()
    {
        FiddlerApplication.BeforeRequest -= FiddlerApplication_BeforeRequest;
        if (FiddlerApplication.IsStarted())
        {
            FiddlerApplication.Shutdown();
        }
    }


    private void FiddlerApplication_BeforeRequest(Session sess)
    {
        //Debug.WriteLine("FiddlerApplication_BeforeRequest: " + sess.LocalProcessID.ToString());
        if (WatinIEprocessHolder.ContainsKey(sess.LocalProcessID))
        {                
            //see http://stackoverflow.com/questions/14284256/how-to-manually-set-upstream-proxy-for-fiddler-core
            sess["X-OverrideGateway"] = WatinIEprocessHolder[sess.LocalProcessID];
        }
    }