Hello

I been trying to modify response.

my app send Accept-Encoding: gzip. i am trying to verify if modification break it or not.

response is ssl base and i am sending request 0x20 byte with POST but i can't break or find option to change buffer at OnBeforeResponse 

so far i am trying

var oBody =oSession.responseBodyBytes;

but i can't find docs or information how to modify body response if its raw data.. there bit lot documents for html and xml modification.

i want to change response body first or last byte. to see if my application detect change or not.

Thx in advance.

I use fiddlercore in my wpf application,which capture http/https info.

i use :

    FiddlerCoreStartupFlags oFCSF = FiddlerCoreStartupFlags.Default;
            int iPort = 8877;
            //Fiddler.FiddlerApplication.Startup(iPort, oFCSF);//启动
            //允许descript https请求
            //Fiddler.FiddlerApplication.Startup(iPort, true, false, true);//启动
            Fiddler.FiddlerApplication.Startup(iPort, oFCSF);

I noticed this issue today, and I wanted to point it out for anyone who might have seen a similar issue. When Fiddler starts up, it sets your LAN settings check box to use a proxy server for your LAN, and when it closes normally it unchecks the box. However, yesterday my computer shut down without closing all applications manually, so Fiddler was forced closed, and when this occurs the check box is not unchecked, and you are unable to use the internet because your browsers are attempting to connect to a proxy server that doesn't exist. It's a quick fix once you realize what's going on, you can either start Fiddler back up, or go into your internet properties -> Connections -> LAN Settings and uncheck the box manually.

Hello. I installed program on my PC. This program sends POST&GET requests. Fiddler doesn't capture them. I added necessary certificates. and set to decrypt HTTPS traffic from all processes. What shall i do?  

Hi,

Someone please clarify my doubts which are stated below :

1) What is a session in fiddler ?

2) What is  the Difference between Sequence (clock) duration and Aggregate session duration ?

3) What should I understand when Sequence (clock) duration value is greater than Aggregate session duration value ?

4) What should I understand when Sequence (clock) duration value is lesser than Aggregate session duration value ?

Thanks & Regards,

Ritesh

A heads up if you're trying to run Fiddler on a Mac with mono 5.2.  Starting from Mono 5.2, the "mono"command defaults to 64-bit.  Use --arch=32 switch to 32-bit mode to run Fiddler.exe.  

 

mono --arch=32 Fiddler.exe

 

This threw me for a while as I'm not a mono user and Fiddler continually failed on start with the error below.

 

WARNING: The Carbon driver has not been ported to 64bits, and very few parts of Windows.Forms will work properly, or at all
Stacktrace:

  at <unknown> <0xffffffff>
  at (wrapper managed-to-native) System.Windows.Forms.XplatUICarbon.CGDisplayBounds (intptr) [0x00002] in <37dfd86a0d3248c0b8cd4af52ec71426>:0

Thanks so much for getting the Mac version of Fiddler started. I know it's buggy and just the first step, but I'm super stoked that this is happening.

```

bash-4.3# mono Fiddler.exe
exception inside UnhandledException handler: The type initializer for 'Fiddler.CONFIG' threw an exception.

[ERROR] FATAL UNHANDLED EXCEPTION: System.TypeInitializationException: The type initializer for 'System.Windows.Forms.XplatUI' threw an exception. ---> System.TypeInitializationException: The type initializer for 'System.Drawing.GDIPlus' threw an exception. ---> System.DllNotFoundException: libgdiplus.so.0
  at (wrapper managed-to-native) System.Drawing.GDIPlus:GdiplusStartup (ulong&,System.Drawing.GdiplusStartupInput&,System.Drawing.GdiplusStartupOutput&)
  at System.Drawing.GDIPlus..cctor () [0x000cc] in <1917aa1c39d94b1a91807b8cd9f03350>:0
   --- End of inner exception stack trace ---
  at System.Drawing.KnownColors..cctor () [0x0001a] in <1917aa1c39d94b1a91807b8cd9f03350>:0
   --- End of inner exception stack trace ---
  at System.Windows.Forms.Application.EnableVisualStyles () [0x00006] in <d5b72d15d4f7424c8a1538e3f19ec2e3>:0
  at Fiddler.frmViewer.ÂÂ (System.String[] ÂÂ) [0x00040] in <1f5c91af40d14c0eb3b0cb76da0ecdcc>:0                                                                                                                                                                               
  at Fiddler.frmViewer.ÂÂ (System.String[] ÂÂ) [0x00016] in <1f5c91af40d14c0eb3b0cb76da0ecdcc>:0

```

 

Slackware64_14.2

Mono JIT compiler version 4.6.2 (Stable 4.6.2.7/08fd525 Thu Feb  2 14:37:53 CET 2017)

I got a request every 5 seconds from my software to the server in the form

<?xml version='1.0' encoding='UTF-8'?>
<SOAP-ENV:Envelope xmlns:SOAP-ENV="default" SOAP-ENV:encodingStyle="default">
    <SOAP-ENV:Body>
<login user="xxxx" password="xxxx" token="jrxrOIX8aziQvGs4" />
    </SOAP-ENV:Body>
</SOAP-ENV:Envelope>

is there a way i can capture the value of the token and create a new request of a different form with the same token using fiddlercore and c# ?

cheers

So i have the below request

 

<?xml version='1.0' encoding='UTF-8'?>
<SOAP-ENV:Envelope xmlns:SOAP-ENV="default" SOAP-ENV:encodingStyle="default">
<SOAP-ENV:Body>
<login user="3602e743d1ba76fb" password="888888" terminal_id="3602e743d1ba76fb" terminal_type="1" mac="08:00:27:db:56:ce" netmode="4" soft_ver="000 pad_1.2.09 eng..20170714.181621" hard_ver="376 KTU84P" epg="epo" token="SKeXAEmnvgBKp74A" />
</SOAP-ENV:Body>
</SOAP-ENV:Envelope>

 

How can i replace parts of this in c# such as 3602e743d1ba76fb with another number ?

is this correct ? it doesn't seem to work

 

  Fiddler.FiddlerApplication.BeforeRequest += delegate(Fiddler.Session oS)
            {

                oS.bBufferResponse = true;
                oS.utilDecodeRequest();
                oS.utilReplaceInRequest("3602e743d1ba76fb", "4c1d80a8f35e6a4d");   //userid
                oS.utilReplaceInRequest("08:00:27:db:56:ce", "38:1d:d9:9a:51:a2");   //mac


            };