Hello,

i have a problem with Fiddler. I tried everything and spent hours to find a solution but i can't find one myself.

We have written a software to communicate with different webshops to upload articles, import orders and so on.

I usually use fiddler to fix a problem and check the request/response.

It works with every webshopsystem except shopware which is using a REST API.

Fiddler shows the HTTP GET Requests but no POST or PUT.

It's on the same system, same software, same functions. I have no idea why it's not capturing these Requests.

 

Example:

We download the categories with HTTP GET http://websiteurl.de/api/categories ( shows up in Fiddler )

To upload a new categorie we use the same URL and everything, we just send a simple JSON via HTTP POST http://websiteurl.de/api/categories ( not showing up in Fiddler )

Any ideas would be appreciated.

Thank you.

Simon

Hi,

 

Is it at all possible to run multiple instances of Fiddlercore for different ports?

 

Thanks

 

Steve

Hello all,

I was working on a addon that uses an external dependency. When launching Fiddler, it gives me the error:

Could not load file or assembly 'Microsoft.Xna.Framework, Version=4.0.0.0, Culture=neutral, PublicKeyToken=842cf8be1de50553' or one of its dependencies. The system cannot find the file specified.

Type: System.IO.FileNotFoundException
Source: FiddlerOmega
   at Omega.AutoTamperResponseAfter(Session oSession)

[....]

 

 

I have copied the Microsoft.Xna.Framework.Dll to the scripts-folder along with the addon.

 

What am I missing here?

 

Thanks in advance!

I'm using Fiddler v4.6.2.32002 under Windows Server 2008 R2

Protocols set in fiddlers settings:

<client>;ssl3;tls1.0;tls1.1;tls1.2

Certificates generated by CertEnroll engine

I'm trying to access https://www.staples.com and capture its traffic using Chrome (version 52). I receive ERR_CONNECTION_RESET when trying to view shopping cart while fiddler is running. I get similar result in other browsers: "This site can’t be reached The connection was reset." in Opera for example.

Fiddler Log:

I tried:

resetting fiddler's certificates, changing protocol list. No success.

I need to capture and decrypt the traffic.

What other steps should I do or what info provide?

---------------------------
Initialization of CONFIG Failed
---------------------------
Fiddler has encountered an unexpected problem. If you believe this is a bug in Fiddler, please copy this message by hitting CTRL+C, and submit a bug report at http://www.telerik.com/forums/fiddler.

Les cultures personnalisées ne peuvent pas être passées par LCID, mais seulement par nom.

Type: System.ArgumentException
Source: mscorlib
   à System.Globalization.CompareInfo.GetCompareInfoWithPrefixedLcid(Int32 cultureKey, Int32 prefix)

   à System.Globalization.CultureInfo.get_CompareInfo()

   à System.String.EndsWith(String value, Boolean ignoreCase, CultureInfo culture)

   à Fiddler.CONFIG..cctor()


Fiddler v2.6.2.3 (x86 x86) [.NET 2.0.50727.8670 on Microsoft Windows NT 10.0.10586.0] 
---------------------------
OK   
---------------------------

Version of the installer: 4.6.2.30081

While trying to install Fiddler on my (Win10) laptop, the setup initiates and after windows confirmation popup to install- it just disappears. I tried running the installation as local admin, restarting and changing compatibility settings but to no avail. I know another person at my organization is running into the same issue. Can you please help?

 

I haven't used Fiddler for a month or so. Now when I load it I can't connect to anything. It breaks all internet traffic. 407 error messages for all URLs including those that are from the actual server I'm running Fiddler on. When using a web browser I get a proxy server user authentication prompt window. It makes no difference when I put my credentials in and click submit. It just throws up the same credentials prompt over and over. If I turn on 'Rules\Require Proxy Authentication' and then turn it off again, (lots of times) eventually it starts to allow IE to start connecting. But if I put the url I'm testing into Fiddler itself in the Composer tab and execute a get request there, I continue to get 407 errors in Fiddler, even though that same URL is giving a 200 now in IE on the same box.

I have tested this under two different user accounts on two PCs, and the server admin account on two different servers. Results are consistent. Always a 407 error. Turning 'Rules\Require Proxy Authentication' on and off a number of times eventually allows IE to get access, but never allows Fiddler to send requests from inside the app in the composer tab. This is using the latest version of Fiddler.

Hi guys

Trying to analyze facebook app and it's failed. Screen below.

Made all steps form here http://www.telerik.com/blogs/fiddler-and-modern-tls-versions

4 month ago it works fine.

Any ideas to solve it?

Thanks

 

I'm attempting to use Fiddler to debug web traffic from a Roku\Brightscript application, where the client HTTP library does not have built-in proxy support (that I can find). I've been able to get unencrypted traffic running through Fiddler by manually placing a Host header so that a request that would look like this: 

GET http://www.myserver.com/path

Becomes:

GET http://<proxyip>:8888/path
Host: www.myserver.com

This is working perfectly, but HTTPS calls are not, and the particular server I'm trying to debug specifically requires HTTPS. I'm referencing the Fiddler root certificate, and I've tried setting Host to "www.myserver.com:443", using both https and http for the protocol of the actual request, and the request continues to either time out or fail immediately. I was hoping somebody would know something simple that I'm missing to get this working. Thanks in advance.

Hello,

Trying to do a bit of automation around Fiddler's configuration in a controlled environment for non-administrators. Is there anyway to enable the 'Decrypt HTTPS traffic' option, as well as create/import the Fiddler certificates via scripting? Alternatively, if we have an internal CA can we leverage our issued certs?

Thanks in advance.