envoyproxy/envoy

[Question] How to change the relative redirect location to absolute url?

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#37,883 opened on Jan 6, 2025

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area/httpenhancementhelp wanted

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Description

Title: How to change the relative redirect location to absolute url?

Description:

I have an upstream server that responses a request with status code = 303 and a relative location such as: "/session/12345/status". Hence, when I use the following route config, the redirection failed with an error: "Internal redirect failed: invalid location...":

route:
    cluster: my_upstream
    auto_host_rewrite: true
    max_internal_redirects: 5
    internal_redirect_action: HANDLE_INTERNAL_REDIRECT
    internal_redirect_policy:
      max_internal_redirects: 5
      redirect_response_codes:
        - 303

Checking the document seems to require an absolute path for the location: https://www.envoyproxy.io/docs/envoy/latest/intro/arch_overview/http/http_connection_management#internal-redirects

Is there any work around for this? Thank you.

Contributor guide

Research direction
Investigate Envoy's internal redirect handling and options to convert relative location to absolute URL, such as using Lua filter or route level redirect rewriting.
Tech stack
cpp
Domain
backendinfrastructure
Issue type
Research
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
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.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
Envoy configurationHTTP
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
65