Questions on Fiddler Forum

0 answers

225 views

Hi all,

I'm trying to an auto responder for any url and contains two words in the body. I am using the following, but it never works :-(

URLWithBody:regex:.* regex:assignRequest.*127

Here i am expecting any body request containing assignRequest and 127 (order doesn't matter) to auto respond but it doesn't work I've also tried other combinations without success

it works if i just use one word, but not two.

Regards

Chris

Windows

asked on 28 Jun 2017

0 answers

330 views

Does System.Windows.Forms.Form work in Fiddler script?

I know it uses Jscript.NET but is there some special context it runs within (and is documented somewhere) that would prevent me from instantiating a Form to input a string, select from a radio button group, etc? Or is a different file supposed to be edited?

When I try to add the following to CustomRules.js in the ScriptEditor, it says "ERROR LINE --> MyForm myform = new MyForm() - The list of attributes does not apply to the current context" when I save the script.

Here is the Form class I am trying to use to make a dialog:

import System.Windows.Forms;

import System.ComponentModel;

import System.Drawing;

class MyForm extends System.Windows.Forms.Form {

// declare variables

private var label1: Label;

private var textBox1: TextBox;

private var button1: Button;

private var panel1: Panel;

// constructor

function MyForm() {

//SuspendLayout(); // suspend layout events

// label, size, and center form

Text= "Resize Me!";

ClientSize= new System.Drawing.Size(300,300);

StartPosition= System.Windows.Forms.FormStartPosition.CenterScreen;

// create a label

label1= new Label;

label1.Location= new Point(10,10);

label1.Size= new System.Drawing.Size(80,20);

label1.Name= "label1";

label1.Text= "Label";

label1.Anchor= AnchorStyles.Left;

// create a TextBox

textBox1 = new TextBox;

textBox1.Location= new Point(10,30);

textBox1.Size = new System.Drawing.Size(80,20);

textBox1.Name= "textBox1";

textBox1.Text = "Hello World";

textBox1.Anchor= AnchorStyles.Left;

// create a Button

button1= new Button;

button1.Location= new Point(200,240);

button1.Size= new System.Drawing.Size(80,20);

button1.Name= "button1";

button1.Text= "Button";

button1.Anchor= AnchorStyles.Right | AnchorStyles.Bottom;

// create a Panel

panel1= new Panel;

panel1.Location= new Point(0,0);

panel1.Size= new System.Drawing.Size(300,300);

panel1.Name= "panel1";

// resize panel on resize form

panel1.Anchor= AnchorStyles.Top | AnchorStyles.Left | AnchorStyles.Right;

// add controls to the panel

panel1.Controls.Add(label1);

panel1.Controls.Add(textBox1);

panel1.Controls.Add(button1);

// add panel to form

this.Controls.Add(panel1);

//ResumeLayout(); // resume layout events

} // end_constructor

} // end_class

class Handlers {

...

static function BeforeTestList(arrSess: Session[]): boolean

{

MyForm myform = new MyForm();

myform.ShowDialog();

return true; // Test should proceed; return false to cancel

}

Fiddler Classic

asked on 27 Jun 2017

0 answers

384 views

Fiddler not detecting requests prepared by Python's requests library

Using the Python requests library, I can do something like this:

session = requests.Session()session.post("https://testurl", ..., verify=false)

and Fiddler will detect the web request just fine. However, if I use a prepared request like so:

session = requests.Session()request = requests.Request("POST", "https://testurl", ...)session.prepare_request(request)session.send(prepared, verify=false)

the sent web request does not show up in the session list in Fiddler. I've confirmed that the request is getting sent and receiving a response through the Python script, but for some reason it's not showing up in Fiddler. Any ideas? I don't have any filters or rules enabled.

Fiddler Classic

asked on 27 Jun 2017

0 answers

103 views

Any way to see the CertificateRequest during ServerHello?

I know Fiddler (which is awesome by the way) can server a certificate upon request from the server; however, I'm trying to debug what type of filters the 3rd party server (we don't have access to it) is trying to request.

In the connect request/response I don't ever see an actual CertificateRequest although I some information about the connect, and that Fiddler handled some items in that TLS handshake, just not about a certificate request from the server for the client...

Is this something just not possible with Fiddler and I need to wireshark this?

Cheers!

Fiddler Classic

asked on 27 Jun 2017

10 answers

293 views

FiddlerHook extension cannot be verified in Firefox 40

I'm wondering when FiddlerHook will be released as a signed add-on for Firefox.

Mozilla has announced that in the near future, unsigned add-ons will no longer be alllowed to run.

Extensions and Customization

answered on 21 Jun 2017

0 answers

229 views

Auto responder not working

Auto responder can match the request, but not responses with the selected content, just passthrough.

MacOS

asked on 21 Jun 2017

1 answer

274 views

Fiddler vs. Windows 10 Creators Update & "mobileservice:13340"

I have been unable to set fiddler as the system proxy ever since updating to the Windows 10 "creators update"(Version 1703, build 15063.332). All fields on the LAN settings window are blank, and it won't let me update them. I enter "127.0.0.1" and "8888" and after the advanced settings window closes, clicking "ok" does NOTHING!!! Reinstalling fiddler ALSO does NOTHING!!!!

After one cumulative update of Windows, the problem got worse:

" 22:17:47:1692 ! WARNING: Port 8888 is already in use (for at least some IP addresses) by 'mobileservice:13340' "

At startup, a dialog asks to reassign fiddler to a different random port. If I decline, the attached error dialog shows up.

Any suggestions?

Fiddler Classic

answered on 20 Jun 2017

7 answers

1.1K+ views

HTTPS traffic capturing

When I am trying to capture traffic of my website that deployed over HTTPS protocol along with proxy configuration in my local network, system throw following error. I have tried all possible setting in Tools -> Fiddler Option -> HTTPS and Connection but nothing work:

[Fiddler] The connection to the upstream proxy/gateway failed. Closing Fiddler, changing your system proxy settings, and restarting Fiddler may help.
System.Exception Upstream Gateway refused requested CONNECT.

Please help me in fixing this problem, as I need to record some performance matrix for my website.

Fiddler Classic

answered on 20 Jun 2017

1 answer

150 views

502 response on a curl request

New to fiddler. I am trying to do a REST API curl request but getting a red 502 response.

Here is the curl request:

curl -X GET https://sandbox.forte.net/api/v3/organizations/org_333251/locations/loc_191620/customers/
-H "Content-Type: application/json"
-H "X-Forte-Auth-Organization-Id: org_333251"
-H "Authorization: Basic Mjk3NjMwMGJiNjlmMDhiMmRmZTU3NzU0ZDkyMWI4Y2Q6NmU4N2QwZjUwMmE4ZGE5M"
-H "Accept: application/json"
-H "Cache-Control: no-cache"

It is a sandbox account so no problem if you want to play around with it.

All the credentials are good, and it works in Postman, but for the life of me I can't get it to work in Fiddler :(

What am I missing?

FiddlerCore

answered on 20 Jun 2017

2 answers

182 views

Bug report, severe: Fiddler repeatedly takes all memory

Dear Guys,
For some weeks now, I often have severe memory problems with Fiddler. Fiddler takes all memory, then all other applications need to access the pagefile and quickly the system becomes unusable. This happens every two days or once a week or so. It happens today and it happened two days ago.
* I don't stream any audio or video.
* "Keep only" is set to 100.
* To me, it seems this is somehow correlated to Windows downloading some update packages. Not sure, though.
Fiddler Version:
v4.6.20171.7553
Built: Fr, 27. Jan 2017
64-bit AMD64, VM: 49,0mb, WS: 84,0mb
.NET 4.6.2 WinNT 10.0.15063.0
If client aborts while streaming, finish if session visible

!memory in QuickExec Box gives:
11:57:33:4986 Fiddler.Network.ProtocolViolation - [#278] The Request's Host header did not match the URL's host component.
URL Host: a-0020.a-msedge.net
Header Host: officecdn.microsoft.com
11:57:33:6278 Fiddler.Network.ProtocolViolation - [#279] The Request's Host header did not match the URL's host component.
URL Host: a-0020.a-msedge.net
Header Host: officecdn.microsoft.com
11:57:33:7550 Fiddler.Network.ProtocolViolation - [#280] The Request's Host header did not match the URL's host component.
URL Host: e1723.dscd.akamaiedge.net
Header Host: officecdn.microsoft.com
11:57:33:9009 Fiddler.Network.ProtocolViolation - [#281] The Request's Host header did not match the URL's host component.
URL Host: e1723.dscd.akamaiedge.net
Header Host: officecdn.microsoft.com
12:09:15:5155 fiddler.network.readresponse.failure> Session #346 raised exception System.Net.Sockets.SocketException Eine bestehende Verbindung wurde softwaregesteuert
durch den Hostcomputer abgebrochen
12:09:15:5155 fiddler.network.readresponse.failure> Session #347 raised exception System.Net.Sockets.SocketException Eine bestehende Verbindung wurde softwaregesteuert
durch den Hostcomputer abgebrochen
12:13:38:7092 fiddler.network.readresponse.failure> Session #352 raised exception System.Net.Sockets.SocketException Eine bestehende Verbindung wurde softwaregesteuert
durch den Hostcomputer abgebrochen
12:13:38:7092 fiddler.network.readresponse.failure> Session #353 raised exception System.Net.Sockets.SocketException Eine bestehende Verbindung wurde softwaregesteuert
durch den Hostcomputer abgebrochen
12:14:03:7589 MEMORY ANALYSIS
-= Fiddler Memory Usage =-
Process Bitness: 64
OS Version: 10.0.15063.0
CLR Version: 4.0.30319.42000
LOH Compact: Supported
The Web Sessions list contains 101 Sessions, accounting for:
137.036 bytes of headers
3.152.234 bytes of bodies
0 bytes of WebSocket messages
-PRE-GC-
GCAllocated: 13.348.669.776
VirtualMemory: 14.230.929.408
WorkingSet: 2.936.229.888
-POST-GC-
GCAllocated: 9.598.081.592
VirtualMemory: 9.817.096.192
WorkingSet: 1.418.104.832
-= System Memory Info=-
Total Physical: 8.501.952.512
Available: 3.918.082.048
Total Virtual: 140.737.488.224.256
Available: 140.690.886.983.680
Total PageFile: 21.374.271.488
Available: 7.160.733.696

After some seconds, all the freed memory is taken up again. !memory gives then:
12:15:45:7548 MEMORY ANALYSIS
-= Fiddler Memory Usage =-
Process Bitness: 64
OS Version: 10.0.15063.0
CLR Version: 4.0.30319.42000
LOH Compact: Supported
The Web Sessions list contains 101 Sessions, accounting for:
137.036 bytes of headers
3.152.234 bytes of bodies
0 bytes of WebSocket messages
-PRE-GC-
GCAllocated: 12.447.535.864
VirtualMemory: 12.671.918.080
WorkingSet: 5.590.409.216
-POST-GC-
GCAllocated: 10.362.271.696
VirtualMemory: 10.570.149.888
WorkingSet: 3.508.121.600
-= System Memory Info=-
Total Physical: 8.501.952.512
Available: 3.343.585.280
Total Virtual: 140.737.488.224.256
Available: 140.690.219.040.768
Total PageFile: 20.293.812.224
Available: 5.401.878.528

Four minutes later:
12:19:17:0911 MEMORY ANALYSIS
-= Fiddler Memory Usage =-
Process Bitness: 64
OS Version: 10.0.15063.0
CLR Version: 4.0.30319.42000
LOH Compact: Supported
The Web Sessions list contains 101 Sessions, accounting for:
137.036 bytes of headers
3.152.234 bytes of bodies
0 bytes of WebSocket messages
-PRE-GC-
GCAllocated: 13.218.860.992
VirtualMemory: 13.464.555.520
WorkingSet: 1.922.998.272
-POST-GC-
GCAllocated: 10.384.166.112
VirtualMemory: 10.614.800.384
WorkingSet: 392.175.616
-= System Memory Info=-
Total Physical: 8.501.952.512
Available: 2.732.867.584
Total Virtual: 140.737.488.224.256
Available: 140.690.356.396.032
Total PageFile: 21.373.087.744
Available: 6.433.079.296

12:25:04:8333 MEMORY ANALYSIS
-= Fiddler Memory Usage =-
Process Bitness: 64
OS Version: 10.0.15063.0
CLR Version: 4.0.30319.42000
LOH Compact: Supported
The Web Sessions list contains 101 Sessions, accounting for:
137.036 bytes of headers
3.152.234 bytes of bodies
0 bytes of WebSocket messages
-PRE-GC-
GCAllocated: 12.335.226.200
VirtualMemory: 14.014.726.144
WorkingSet: 2.947.018.752
-POST-GC-
GCAllocated: 9.590.238.304
VirtualMemory: 9.818.116.096
WorkingSet: 1.271.791.616
-= System Memory Info=-
Total Physical: 8.501.952.512
Available: 4.442.357.760
Total Virtual: 140.737.488.224.256
Available: 140.691.292.782.592
Total PageFile: 24.630.853.632
Available: 10.420.068.352

Process Top List at 12:24 o'clock: 774.png

Windows

answered on 20 Jun 2017