带有CefSharp Offscreen的仅一个浏览器的代理 [英] Proxy for only one browser with CefSharp Offscreen

问题描述

我试图为 ChromiumWebBrowser（）设置代理，而不更改其他浏览器的设置。

I am trying to set a proxy for a ChromiumWebBrowser() without changing the settings of other browsers.

我的代码如下：

CEF初始化

在这里我将进行初始化CefSharp并调用将测试以设置代理的方法

Here I will initialize CefSharp and call the method that will test to set the proxy

public CFTryOut()
    {
        var settings = new CefSettings()
        {
            CachePath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData), "CefSharp\\Cache"),
        };

        CefSharpSettings.ShutdownOnExit = true;

        Cef.Initialize(settings, performDependencyCheck: true, browserProcessHandler: null);

        ProxyTest();

    }

ProxyTest

在这里，我想创建两个 ChromiumWebBrowser（）并将代理设置为仅其中之一

Here I want to create two ChromiumWebBrowser() and set a proxy to only one of them

async Task ProxyTest()
    {
        ChromiumWebBrowser firstbrowser = new ChromiumWebBrowser();
        ChromiumWebBrowser secondbrowser = new ChromiumWebBrowser();

        waitini:
        if (!firstbrowser.IsBrowserInitialized && !secondbrowser.IsBrowserInitialized)
        {
            Thread.Sleep(100);
            goto waitini;
        }

        firstbrowser.LoadingStateChanged += FirstBrowserLoadingStateChanged;
        secondbrowser.LoadingStateChanged += SecondBrowserLoadingStateChanged;

        OpenSync("http://icanhazip.com/", firstbrowser);
        string x = await firstbrowser.GetBrowser().MainFrame.GetSourceAsync();

        //Set the Proxy
        await Cef.UIThreadTaskFactory.StartNew(delegate
        {
            var rc = firstbrowser.GetBrowser().GetHost().RequestContext;
            var v = new Dictionary<string, object>();
            v["mode"] = "fixed_servers";
            v["server"] = "http://45.77.248.104:8888";
            string error;
            bool success = rc.SetPreference("proxy", v, out error);
        });

        OpenSync("http://icanhazip.com/", firstbrowser);
        string y = await firstbrowser.GetBrowser().MainFrame.GetSourceAsync();

        OpenSync("http://icanhazip.com/", secondbrowser);
        string z = await secondbrowser.GetBrowser().MainFrame.GetSourceAsync();


    }

在这里， First / SecondBrowserLoadingStateChanged 允许我在页面加载完成时进行标记，以使 OpenSync 等待页面加载结束，然后返回：

Here, the First/SecondBrowserLoadingStateChangedallow me to flag when the page loading is finished in order for OpenSync to wait for page loading to end before returning :

public void OpenSync(string url, ChromiumWebBrowser browser)
    {
        IsLoading = true;
        browser.Load(url);
        SpinWait.SpinUntil(() => !IsLoading);
    }

我期望

x =我的ip-xx.xx.xx.xx

x = my ip - xx.xx.xx.xx

y =代理的ip-45.77.248.104

y = proxy's ip - 45.77.248.104

z =我的IP-xx.xx.xx.xx

z = my ip - xx.xx.xx.xx

我得到了

x =我的ip-xx.xx.xx.xx

x = my ip - xx.xx.xx.xx

y =代理的ip-45.77.248.104

y = proxy's ip - 45.77.248.104

z =代理的ip-45.77.248.104

z = proxy's ip - 45.77.248.104

问题是我没有在 secondbrowser ，但请求通过代理。我猜那是因为它们共享同一主机。

The thing is I did not set any proxy on the secondbrowser yet the request goes through the proxy. I guess that's because they share the same host.

所以

1）我如何指定每个 ChromiumWebBrowser 的专用代理？

1) how can I specify a dedicated proxy for each ChromiumWebBrowser ?

或

2）如何为每个新的 ChromiumWebBrowser 指定不同的主机？

2) how can I specify a different host for each new ChromiumWebBrowser ?

推荐答案

实际上，这非常容易。

我的问题是我试图设置RequestContext在浏览器初始化之后，它是只读的。

My problem was that I was trying to set the RequestContext after the browser initialization, while it's read only.

但是它可以在构造函数中作为参数传递：

But it can be passed as a parameter in the constructor :

        var rc1 = new RequestContext();
        ChromiumWebBrowser firstbrowser = new ChromiumWebBrowser("", null, rc1);
        var rc2 = new RequestContext();
        ChromiumWebBrowser secondbrowser = new ChromiumWebBrowser("", null, rc2);

对Amaitland的所有信用

All credit to Amaitland

对于更可重用的方式是，可以像这样将代理设置过程逐出：

For a more reusable way, the process to set the proxy can be deported like this :

    async private Task SetProxy(ChromiumWebBrowser cwb, string Address)
    {
        await Cef.UIThreadTaskFactory.StartNew(delegate
        {
            var rc = cwb.GetBrowser().GetHost().RequestContext;
            var v = new Dictionary<string, object>();
            v["mode"] = "fixed_servers";
            v["server"] = Address;
            string error;
            bool success = rc.SetPreference("proxy", v, out error);
        });
    }

然后我可以打电话：

SetProxy(firstbrowser, "123.123.123.123:1234")

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