将HTTP发送到本地FiddlerCore

Question

将HTTP发送到本地FiddlerCore

toy*_*fun 4 c# proxy fiddler fiddlercore

我想建立一个代理服务器来处理本地请求.
例如 - 捕获Web浏览器打印请求并将它们发送到适当的LAN打印机.
到目前为止,我的想法是在Windows服务中托管FiddlerCore引擎.
这是我的代码:

private static void Main()
{
    FiddlerApplication.OnNotification += (sender, e) => Console.WriteLine("** NotifyUser: " + e.NotifyString);
    FiddlerApplication.Log.OnLogString += (sender, e) => Console.WriteLine("** LogString: " + e.LogString);
    FiddlerApplication.BeforeRequest += oSession => { Console.WriteLine("Before request for:\t" + oSession.fullUrl); oSession.bBufferResponse = true; ParseRequest(oSession); };
    FiddlerApplication.BeforeResponse += oSession => Console.WriteLine("{0}:HTTP {1} for {2}", oSession.id, oSession.responseCode, oSession.fullUrl);
    FiddlerApplication.AfterSessionComplete += oSession => Console.WriteLine("Finished session:\t" + oSession.fullUrl);

    Console.CancelKeyPress += Console_CancelKeyPress;
    Console.WriteLine("Starting FiddlerCore...");
    CONFIG.IgnoreServerCertErrors = true;
    FiddlerApplication.Startup(8877, true, true);
    Console.WriteLine("Hit CTRL+C to end session.");

    Object forever = new Object();
    lock (forever)
    {
        Monitor.Wait(forever);
    }
}

private static void ParseRequest(Session oSession)
{
    switch (oSession.host)
    {
        case "localhost.":
            Console.WriteLine("Handling local request...");
            break;
    }
}

private static void Console_CancelKeyPress(object sender, ConsoleCancelEventArgs e)
{
    Console.WriteLine("Shutting down...");
    FiddlerApplication.Shutdown();
    Thread.Sleep(750);
}

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我的问题:
该ParseRequest函数可以识别本地请求(即http://localhost./print?whatever),但是如何阻止代理向前转发它们(解析并执行打印请求但没有得到404页面)？

Answer 1

toy*_*fun 5

自己找到解决方案:

在BeforeRequest回调中,Fiddler.Session对象作为参数传递.
调用其utilCreateResponseAndBypassServer功能时,请求不会中继到任何服务器,而是在本地处理.

所以,我的新ParseRequest功能如下:

private static void ParseRequest(Session oSession)
{
    if (oSession.hostname != "localhost") return;

    Console.WriteLine("Handling local request...");
    oSession.bBufferResponse = true;
    oSession.utilCreateResponseAndBypassServer();
    oSession.oResponse.headers.HTTPResponseStatus = "200 Ok";
    oSession.oResponse["Content-Type"] = "text/html; charset=UTF-8";
    oSession.oResponse["Cache-Control"] = "private, max-age=0";
    oSession.utilSetResponseBody("<html><body>Handling local request...</body></html>");
}

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