Create a Rule to Disable Caching

Environment

Description

I want to always get the latest content from the server. How to prevent the server or client application from caching an HTTP(S) Request or Response?

Solution

You can use the Rules tab to create and apply a rule for all traffic that goes through the proxy.

• Create a condtition that matches all captured trafficc. For demonstartion purposes we are using regular expression .* which matches every string.

• Add actions to overwrire and remove all HTTP Requests and Responses Headers that are related to caching:

  Fiddler Action	Headers	Value	Action
  Update Request Header	If-Modified-Since	any	Remove
  Update Request Header	Pragma	no-cache	Set Value
  Update Request Header	Cache-Control	no-cache, no-store, must-revalidate	Set Value
  Update Response Header	Expires, Last-Modified, ETag	any	Remove
  Update Response Header	Expires	0	Set Value
  Update Response Header	Cache-Control	no-cache, no-store, must-revalidate	Set Value

  As a result, the newly created rule looks like this:

• Enable the Rules tab and the newly created rule.

See Also

• Sample Rules Presets
• Using Breakpoints
• Understanding the Matching Conditions and the Actions
• Understanding the role of Final and Non-Final Actions