topic Registered
Verified 2026-09-19 · registry updated 2025-10-02

HTTP registry: One of either "strict" or "lenient"

When value is "strict", it indicates that the client wishes the server to apply strict validation and error handling to the processing of a request. When the value is "lenient", it indicates that the client wishes the server to apply lenient validation and error handling to the processing of the request.

HTTP parameter values extend negotiation, framing, preferences, range handling, or other protocol components. One of either "strict" or "lenient" is registered in HTTP Preferences. Defining reference: rfc7240.

httpregistryhttp-parameterspreferences

Identifier (http)

One of either "strict" or "lenient"

When value is "strict", it indicates that the client wishes the server to apply strict validation and error handling to the processing of a request. When the value is "lenient", it indicates that the client wishes the server to apply lenient validation and error handling to the processing of the request.

Interpret parameters only in the context that defines them; unknown parameters must not silently change security or framing behavior.

This registry value is currently marked active by IANA. Follow the defining specification before sending, accepting, or proxying it.

IANA registry: http-parameters/preferences

Registry reference: rfc7240

Permalink: https://merginit.com/reference/http/registry/http-parameters/preferences/one-of-either-strict-or-lenient-135