I've installed Fiddler on my Windows 7 machine and I'm trying to execute the following PHP CURL routine so that I can see the POST request body in Fiddler:


Whenever I visit the page, however, all I see in Fiddler is a GET request--not a POST request.

What do I need to do / configure in Fiddler to see the POST requests? I don't have the HTTPS Decryption enabled but that's because I shouldn't need to enable it for basic HTTP debugging (I'm not working with any SSL projects at the moment).

Whenever I attempt to decrypt HTTPS traffic with Fiddler (something that once upon a time worked for me) I get an error very similar to the following:

Creation of the interception certificate failed.

makecert.exe returned -1.

Results from C:\Program Files (x86)\Fiddler2\MakeCert.exe -pe -ss my -n "CN=manage.windowsazure.com, O=DO_NOT_TRUST, OU=Created by http://www.fiddler2.com" -sky exchange -in DO_NOT_TRUST_FiddlerRoot -is my -eku 1.3.6.1.5.5.7.3.1 -cy end -a sha1 -m 132 -b 06/08/2013

Error: Fail to acquire a security provider from the issuer's certificate
Failed
--------------------------------------------------------

I have already attempted the repair steps documented here to no avail: http://stackoverflow.com/questions/5519418/fiddler2-unable-to-generate-certificate

if ( (oSession.host=="203.104.209.55") && (oSession.PathAndQuery.indexOf("/kcsapi/api_port/port")>-1) ){
        oSession["ui-bold"]="true";
        oSession["x-breakresponse"]="true";
        oSession.utilSetResponseBody("");
}

Above is what is have in OnBeforeResponse function.

However when I request this url,
1. the session won't be paused
2. although it shows in fiddler inspection that the response body is blank, I can still view the response body in my browser
3. the ui-bold works :(

If I enable the automatic breakpoint (alt+F11), and then continue the process. Both fiddler and my browser shows no response now.

Hello Eric, i've been racking my brains for the last few days figuring out why i cant sniff my twitter android app traffic anymore!



Basically what worked before was that i had simply installed fiddler proxy on my PC, exported the root certificate (and added it to my android devices CA storage), then i installed cydia's mobile substrate and Android-SSL-TrustKiller because apparently the twitter apk uses certificate pinning that needs to be bypassed in order to properly MitM the app. I set my android wifi proxy settings to the same ip:port as the machine that fiddler is listening on.



Unfortunately this does not work anymore and im left unable to properly read twitters app traffic, whereas googleplay, facebook, instagram, etc etc all work fine. It had worked fine until a few days ago. I hadn't updated my twitter app either so im just not sure how it could have broke itself.



I tried proxydroid (which uses iptables i believe), and fiddler showed attempts at connecting to one of twitters ip, but it never goes through (i believe this is an issue with the IP not resolving to the host-name correctly, which causes certificate name mismatch errors)

With standard wifi proxy tuned to fiddler, i dont see ANY requests.  With proxydroid, i see this http://gyazo.com/6792f884e1f88453a8cacb1632d0b3d5
(tones of CONNECTS and cert mismatches, despite having imported fiddlerroot into CA storage.


I'm incredibly vexed...i need someone who can help me properly diagnose and fix this issue.



If it helps, im on a SGS3 android version 4.1.2 (I even tried genymotionemulator, yielding the same results).

Hello!

I have a problem with changing path of request.

I have url:
http://54.56.212.65/Test/ServerTest.do?protocol-version=9&client-login=7d29289c8fad51063e9b3c85cc1a69b4
And I need to change IP with a Path to:
http://12.62.52.32/Release/Server.do?protocol-version=9&client-login=7d29289c8fad51063e9b3c85cc1a69b4

But 'client-login' changing every time after request.
So oSession.PathAndQuery not work.
//
        if (oSession.host=="54.56.212.65") {
            oSession.host="12.62.52.32";

        if (oSession.PathAndQuery=="/Release/ServerTest.do") {
            oSession.PathAndQuery = "/Test/Server.do";
//
How can I change only Path and filename without checking values after '.do'?
Doesn't work...
Help please.(

RT

Hello, all.

My PC has 2 network interface. One for wired network and one for wireless. I want to use fiddler as a proxy for debuging my mobile app(through wireless network). But I find the network speed is very slow at this situation. And all things become right if I disable the wired network interface. But I need the wired network on when I am debuging.

Could someone help? THX

Hi there

I want in c# to change the responce of the server using fiddlercore, I know i can do it like this

oS.utilReplaceInResponse("Microsoft", "Bayden");

BUT what happens if i want to change some dynamic text data between tags to something that is always the same like

oS.utilReplaceInResponse("<version>this can be 5,6,7,8 and change every month</version>", "<version>5</version>");

I want to be able to replace the text or number between some tags that might change over time to always return 5

i have tried with .? with * with .* and they all fail how do i do this ?

cheers

Hi, is there a way to have HTTPs option be turned on during setup, or via an extension ?
Similarly for Win8 exclusions ?

The scenario is using Fiddler for diagnosing HTTPS issues for users that may not be very technical and for whom the manual steps for turning on HTTPs and Win8 exclusions are error prone. But having them execute a script that installs fiddler and an extension is lower bar and less error prone.

Thanks

Hi Eric,

          I have created sample app(Console App in c#) with Selenium Webdriver and BrowserMob Proxy. BrowserMob Proxy has method which return response,i'm write response to a file as follow using below code
               Server server = new Server(<proxy path>);
                server.Start();
                Client client = server.CreateProxy();
                client.NewHar("google");
                var seleniumProxy = new Proxy { HttpProxy = client.SeleniumProxy };                
                var profile = new FirefoxProfile();
                profile.SetProxyPreferences(seleniumProxy);
                IWebDriver driver = new FirefoxDriver(profile);  
               driver.Navigate().GoToUrl(<url>);
              // below harData has response
               HarResult harData = client.GetHar();
               System.IO.File.WriteAllText(<file path>, JsonConvert.SerializeObject(harData, Formatting.Indented));


              Is it possible to do same thing with Selenium Webdriver and Fiddler.

Thanks,
Avinash.

I installed Fiddler several months ago (Windows 7) and didn't use it much. I uninstalled it. In the last few days, my Trusteer app has been complaining that some websites I normally visit have a bad certificate.  I have searched all files and the registry on my computer and can't find any residual Fiddler files. I deleted the root and other certificates labeled "DO_NOT_TRUST ..." But, I'm still getting this error (see attached.) Same behavior in IE and Chrome. Something is stuck. Please advise how to remove and restore normal operation.

Tia