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Header Value Base Cache

Control CDN caching behavior by allowing or denying cache based on specific HTTP header name–value pairs.

The Header Value Base Cache feature allows you to explicitly allow or deny caching when a request contains a specific HTTP header value. This provides precise control over caching behavior for Dynamic Content Acceleration resources where certain header values determine whether content should be cached.

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This feature is available only for Dynamic CDN Resources.

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How Header Value Base Cache Works

When Header Value Base Cache is enabled:

  • Medianova CDN inspects incoming requests for the configured Header and Value.

  • If the request matches the defined rule:

    • Allow — the response is eligible for caching.

    • Deny — the response bypasses the cache and is fetched from the origin.

  • Requests that do not match the rule follow the default caching behavior.

This mechanism allows cache decisions to be enforced conditionally, rather than only by cache key variation.

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Configure Header Value Base Cache

You can configure this feature from the Medianova Control Panelarrow-up-right.

1

Open the Caching Settings

Log in to the Medianova Control Panel, navigate to CDN → CDN Resources, select a Dynamic CDN Resource, and open the Caching tab.

2

Enable Header Value Base Cache

Set Status to On.

3

Select the Rule Type

Choose the behavior for matching requests:

  • Allow — matching requests are cached

  • Deny — matching requests bypass the cache

4

Define the Header Rule

Enter the rule parameters:

  • Header — Name of the HTTP request header

  • Value — Header value to match

5

Apply the Configuration

Select Submit to save and apply the changes.

  • Only one header value-based rule can be active at a time.

  • Header matching is exact; both header name and value must match.

  • This feature controls cache eligibility, not cache key variation.

  • Can be combined with Header Base Cache and Cookie Base Cache for advanced caching strategies.

  • Incorrect use of Deny may significantly reduce cache hit ratio.

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Common Use Cases

  • Prevent caching when a request contains a debug or preview header

  • Allow caching only when a specific feature-flag header is present

  • Enforce cache bypass for internal or authenticated traffic

  • Control caching behavior based on application-specific headers

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