Hi all,

It is possible to automatically filter traffic and then save the matches packets with fiddler?
For example if I have an attachment to a mail I want to save the packet where the file is uploaded and then based on an in-house application open the attached file and search in it for data leakage.

Thanks,
Adrian.

As of the beginning of June, we've started seeing a spike in the certificate-related issues out in the field for our production app.  This spike has caused an 8-fold increase in the number of certificate-related tickets we see - we've been unable to reproduce these issues in house, and examination of our customers' machines has showed that their Personal certificate store appears to be corrupted.  When we installed Fiddler .NET4 on their machines for debugging purposes and attempted to enable HTTPS traffic, we saw the attached "Creation of the interception certificate failed" - Googling this error yielded one possible solution of renaming or deleting the folder under C:\Users\[username]\AppData\Roaming\Microsoft\Crypto\RSA, and another solution of installing the FiddlerCert addon.

At this point, we believe either a recent Windows Update or potentially even new malware is responsible for this spike.  We wanted to see if the folks in the Fiddler community have also experienced a recent spike in this issue, and if so, then are there any other ways to resolve the issue on a machine once it appears?

Hi guys,

I'm using FiddlerCore with VB.Net as I have to manipulate some pages in my company.
The problem is its acting weird with the HTTPS and most of the images in the webpages doesn't load.

Here you have the code I'm using right now:

http://pastebin.com/cFQ7XJA1

Here you have a screenshot of the error:

http://prntscr.com/3um4jv

I don't know why this happens as I have the certificate in the trustable:

http://prntscr.com/3um4tm

What am I doing wrong?
Thanks for the help.

Add timeline(Overall Elapsed) into customize columns ,  I need to sort the timeline .  The purpose is I want to know which URL , which API are very slow.    So I can improve the URL performance.  
        The Overall Elapsed  already in the tab "Statistics" per URL.    Well  I need to add this data into right table to sort.



Thanks

Hi,
I installed Fiddler on my PC to debug a communication issue between my PC running an ordering application through IE8 (same issue with IE11) and an external catalog application. The strange thing is that when Fiddler is installed, the application is working correctly. On PC's where Fiddler is not installed, we get error messages. As soon as we install Fiddler, the application works perfectly.
​The issue manifests itself with the user not obtaining an automated logon to the web site via the OCI 4 interface when using the standard IE8 browser settings. When Fiddler is installed, the issue disappears.
Any idea what behavior Fiddler could change to make this working?
Thanks in advance for your support.
Peter

First ,I want to say that fiddler is a reallllllly useful tool !

However, I have been disturbed for a long time about this problem. So here is the problem.

 
Step 1.

I received a response from server like this   (some useless headers have been omitted) :
 

HTTP/1.1 200 OK
Server: GewaServer3
Content-Type: text/html;charset=UTF-8
Content-Length: 48

var data = {"retval":"145918761","success":true}

 

Step 2.

After receiving the previous response, I hope fiddler could automatically send the request like this:
 

POST http://www.gewa.com/ajax/trade/save.xhtml HTTP/1.1
Host: www.gewa.com
Connection: keep-alive
Cookie: bdshare_firstime=1385011581672;
 
code=1321&Id=145918761&type=1556
 


But  I hope this part in request body 

(Id=145918761)

will be automatically changed according to the response body I received before 

("retval":"145918761")

 
I try to find a way to solve the problem for many days but I couldn’t.

If anyone could help I would be soooooo grateful!

Thanks again!
 

 

 

 

when I open the fiddler does not appear any link, even if I open a page in my browser, help me what do I do?

Hi,

I have been searching everywhere on the net and have found this link for an inspector for WCF RIA calls. http://blog.functionalfun.net/2009/11/fiddler-plug-in-for-inspecting-wcf.html

But it is no longer available for download at the MSDN Code Gallery URL linked in the article.

Does anyone know where I can download this plugin or is there a different way to decode WCF RIA services using Fiddler?

-Tim

I have noticed this for a while now. It would slowly grow and grow and grow, even if I have 100 sessions max to keep. I may have noticed a few times when it's grown past a gigabyte in memory, to start growing more exponentially, as much as two megabytes per "refresh" in browser window. However, the real problem is that it also does it when there's filters turned on. To my understanding, filters should prevent traffic that doesn't pass them from being stored anywhere. The main reason why I have noticed it, is because I work with an external API to monitor all the calls towards them (ie if the request url doesn't contain "wsapi", it doesn't get through) and I have fiddler running on the background at all times regardless of whether the API is used or not, and occasionally my system would slow down, so I would open task manager... and see fiddler hogging about 7 gigs of ram. Yes, seven gigs, almost half of my RAM, with the fiddler window being completely empty. Yes, empty. No records, none. Yet Fiddler is growing exponentially, should I forget it on for a few days without checking on its memory footprint.

It's something that has been there for ages, and not something I think about, as I normally just restart the program (or close and start it when I need it), but since I discovered it while I had some spare time, I thought I'd make a post about it, as the internet has been rather fruitless about it, although I can see a few posts which normally relate to garbage collection... but considering I have had the slowdown with 1,5 gigs of Fiddler memory with rest of the applications pushing it far over 16 gigs (swap file to the rescue), if it really is that, the garbage collector is doing an incredibly rotten job, as the resources are definitely needed by other applications.

I am very new to Fiddler and am needing some help monitoring some JSON messages. I normally use a test client from my pc to send json messages to a rest api endpoint on azure. There are various other applications sending messages to that endpoint too. How do i capture all the messages that reach the endpoint?