Fiddle Tampering Request/Response Headers/Body (Replace/ResponseHeaders/Body) FreeHTTP.dll

Jan 28, 2024#WEB #Fiddle #nginx59

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To install the FreeHTTP plugin, download the FreeHTTP.dll file and place it in the Scripts directory of the Fiddle installation folder. Restart Fiddle to access the FreeHTTP page. The plugin allows for rule editing, including URL matching and content manipulation for request and response messages. An example usage is modifying a parameter in the payload of a POST request to a specific URL. The edited rule can be enabled and the matching switch turned on to highlight the manipulated message if successful.

Install the FreeHTTP plugin:
FreeHTTP.dll
After downloading, place it in the Scripts directory under the Fiddle installation directory, and restart Fiddle to see the FreeHTTP page.

2. Basic Function Window:

Rule Editing Window
The first item is used to define rules for matching messages based on the URL

Contain
StartWith
EndWith
is
Regex

The second item is used to select the content to be tampered with

Request Modific
Request Replace
Response Modific
Response Replace

Usage Example
Goal: Modify a parameter in the payload of a POST request message to a specific URL.

Click the + button in the rule list in the upper right corner, and edit in the editing window

Matching rule: Ends with part12.php
Replacement rule: Replace the string that starts with "invite_code": and ends with a comma in the payload section with "invite_code":"372508",
Check the box below the editing window to complete the editing, check this rule in the rule list in the upper right corner to enable it, and turn on the rule matching switch.
If the match is successful, the tampered message will be highlighted.