spring-cloud/spring-cloud-gateway

Include RewriteRequestHeader filter similar to RewriteResponseHeader

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#2353 opened on Aug 30, 2021

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 (1 comment) (1 reaction) (0 assignees)Java (4,284 stars) (3,204 forks)batch import
enhancementhelp wanted

Description

When downstream systems have similar response headers resulting in persistent browser state, a solution could be to simply modify their value to make them unique (e.g. Set-Cookie). If you do so you need to do the reverse operation for request headers representing the same value (like Cookie) which is currently not available as a default filter.

A RewriteRequestHeaderGatewayFilterFactory similar to the existing RewriteResponseHeaderGatewayFilterFactory (equal Config) would solve the problem. Currently I wrote such a filter myself as a work around. As this filter is a reverse one of the existing one I would recommend to add it as a default functionality.

If approved I could help with a pull request for the functionality.

Contributor guide

Tech stack
javaspring
Domain
backendapi
Issue type
feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
JavaSpring Cloud GatewayUnderstanding of existing RewriteResponseHeader filter
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
70
Research direction
Examine the existing `RewriteResponseHeaderGatewayFilterFactory` in the codebase, likely located in a filter package. Create a new `RewriteRequestHeaderGatewayFilterFactory` with identical config structure but operating on request headers instead of response headers. Follow the pattern of the existing filter, including unit tests. No pull request is linked yet.