利用fiddlercore，修改http/https请求与响应

乐笄扬 · 发表于 2023-2-9 00:39:10

fiddler抓包工具，相信很多人都用过，很好用的一款抓包工具。
fiddlercore是官方提供给开发者调用的，用来处理所有的http/https请求，功能就如Fiddler一样强大，fiddlercore官方网站：https://www.telerik.com/fiddlercore
下面我们利用fiddlercore来修改浏览器的响应数据。
自动设置https证书，所有请求都返回“二十有为”

using System;
using System.Collections.Generic;
using System.IO;
using System.Reflection;
using System.Threading;
using Fiddler;
using System.Net.Security;
using System.Security.Cryptography.X509Certificates;
using System.Text;
namespace Demo
{
class Program
{
static Proxy oSecureEndpoint;
static string sSecureEndpointHostname = "localhost";
static int iSecureEndpointPort = 9876;
static void Main(string[] args)
{
Console.WriteLine("Starting ...");
Fiddler.CertMaker.createRootCert();
X509Certificate2 oRootCert = Fiddler.CertMaker.GetRootCertificate();
SetMachineTrust(oRootCert);
Fiddler.FiddlerApplication.oDefaultClientCertificate = oRootCert;
List<Fiddler.Session> oAllSessions = new List<Fiddler.Session>();
#region AttachEventListeners
Fiddler.FiddlerApplication.BeforeRequest += delegate(Fiddler.Session oS)
{
oS.bBufferResponse = true;
HTTPRequestHeaders rHeads = oS.oRequest.headers;
//获取cookie
string cookie = rHeads.AllValues("cookie");
if ((oS.oRequest.pipeClient.LocalPort == iSecureEndpointPort) && (oS.hostname == sSecureEndpointHostname))
{
oS.utilCreateResponseAndBypassServer();
oS.oResponse.headers.HTTPResponseStatus = "200 Ok";
oS.oResponse["Content-Type"] = "text/html; charset=UTF-8";
oS.oResponse["Cache-Control"] = "private, max-age=0";
oS.utilSetResponseBody("<html><body>show!</body></html>");
}
};
Fiddler.FiddlerApplication.BeforeResponse += new Fiddler.SessionStateHandler(FiddlerApplication_BeforeResponse);
Console.CancelKeyPress += new ConsoleCancelEventHandler(Console_CancelKeyPress);
#endregion AttachEventListeners
Fiddler.CONFIG.IgnoreServerCertErrors = true;
FiddlerApplication.Prefs.SetBoolPref("fiddler.network.streaming.abortifclientaborts", false);
FiddlerCoreStartupFlags oFCSF = FiddlerCoreStartupFlags.Default;
int iPort = 0;
Fiddler.FiddlerApplication.Startup(iPort, oFCSF);
oSecureEndpoint = FiddlerApplication.CreateProxyEndpoint(iSecureEndpointPort, true, sSecureEndpointHostname);
if (null != oSecureEndpoint)
{
WriteCommandResponse("success!");
}
bool bDone = false;
do
{
Console.WriteLine("\nEnter h or q:");
Console.Write(">");
ConsoleKeyInfo cki = Console.ReadKey();
Console.WriteLine();
switch (cki.KeyChar)
{
case 'q':
case 'Q':
bDone = true;
DoQuit();
break;
}
} while (!bDone);
}
static void FiddlerApplication_BeforeResponse(Fiddler.Session oSession)
{
if (oSession.isHTTPS)
{
string hostname = oSession.hostname;
int stateCode = oSession.oResponse.headers.HTTPResponseCode;
string pathAndQuery = oSession.PathAndQuery;
//获取服务器返回的html
string body = oSession.GetResponseBodyAsString();
//修改body
body = "二十有为";
oSession.utilDecodeResponse();
oSession.utilSetResponseBody(body);
}
else
{
string body = oSession.GetResponseBodyAsString();
}
}
private static bool SetMachineTrust(X509Certificate2 oRootCert)
{
try
{
System.Security.Cryptography.X509Certificates.X509Store certStore = new System.Security.Cryptography.X509Certificates.X509Store(StoreName.Root, StoreLocation.LocalMachine);
certStore.Open(OpenFlags.ReadWrite);
try
{
certStore.Add(oRootCert);
}
finally
{
certStore.Close();
}
return true;
}
catch (Exception)
{
return false;
}
}
static void Console_CancelKeyPress(object sender, ConsoleCancelEventArgs e)
{
DoQuit();
}
private static void WriteCommandResponse(string s)
{
ConsoleColor oldColor = Console.ForegroundColor;
Console.ForegroundColor = ConsoleColor.Green;
Console.WriteLine(s);
Console.ForegroundColor = oldColor;
}
private static void DoQuit()
{
WriteCommandResponse("Shutting down...");
if (null != oSecureEndpoint) oSecureEndpoint.Dispose();
Fiddler.FiddlerApplication.Shutdown();
Thread.Sleep(500);
}
}
}

复制代码

Demo下载地址：https://pan.baidu.com/s/1_s7ywb3O6zuMto5SDH4Jng
提取码：czun

来源:https://www.cnblogs.com/youzilong202/archive/2023/02/08/17102912.html
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