Add path field for RequestRedirect Filter

[salonichf5]

Proposed changes

Write a clear and concise description that helps reviewers understand the purpose and impact of your changes. Use the
following format:

Problem: Users want to be able to provide path with the RequestRedirect filter.

Solution: Added functionality for path in RequestRedirect filter.

• Extracted common functionality for MainRewrite in createMainRewriteForFilters.
• Extracted common functionality for Path validator.

Testing:

Added unit tests, conformance test and manual testing.

Configure the following HTTPRoutes for tea and soda applications following tutorial

HTTPRoutes

kubectl apply -f - <<EOF
apiVersion: gateway.networking.k8s.io/v1
kind: HTTPRoute
metadata:
  name: tea-redirect
spec:
  parentRefs:
  - name: gateway
    sectionName: http
  hostnames:
  - "cafe.example.com"
  rules:
  - matches:
    - path:
        type: PathPrefix
        value: /tea
    filters:
    - type: RequestRedirect
      requestRedirect:
        path:
          type: ReplacePrefixMatch
          replacePrefixMatch: /organic
        port: 8080
---
apiVersion: gateway.networking.k8s.io/v1
kind: HTTPRoute
metadata:
  name: tea
spec:
  parentRefs:
  - name: gateway
    sectionName: http
  hostnames:
  - "cafe.example.com"
  rules:
  - matches:
    - path:
        type: PathPrefix
        value: /organic
    backendRefs:
    - name: tea
      port: 80
---
apiVersion: gateway.networking.k8s.io/v1
kind: HTTPRoute
metadata:
  name: soda-redirect
spec:
  parentRefs:
  - name: gateway
    sectionName: http
  hostnames:
  - "cafe.example.com"
  rules:
  - matches:
    - path:
        type: PathPrefix
        value: /soda
    filters:
    - type: RequestRedirect
      requestRedirect:
        path:
          type: ReplaceFullPath
          replaceFullPath: /flavors
        port: 8080
---
apiVersion: gateway.networking.k8s.io/v1
kind: HTTPRoute
metadata:
  name: soda
spec:
  parentRefs:
  - name: gateway
    sectionName: http
  hostnames:
  - "cafe.example.com"
  rules:
  - matches:
    - path:
        type: PathPrefix
        value: /flavors
    backendRefs:
    - name: soda
      port: 80
EOF

Response for Request Redirect /tea

curl -L --resolve cafe.example.com:$GW_PORT:$GW_IP http://cafe.example.com:$GW_PORT/tea --include
Handling connection for 8080
HTTP/1.1 302 Moved Temporarily
Server: nginx
Date: Mon, 06 Jan 2025 16:44:29 GMT
Content-Type: text/html
Content-Length: 138
Connection: keep-alive
Location: http://cafe.example.com:8080/organic

curl -L --resolve cafe.example.com:$GW_PORT:$GW_IP http://cafe.example.com:$GW_PORT/tea/type --include
Handling connection for 8080
HTTP/1.1 302 Moved Temporarily
Server: nginx
Date: Mon, 06 Jan 2025 16:44:55 GMT
Content-Type: text/html
Content-Length: 138
Connection: keep-alive
Location: http://cafe.example.com:8080/organic/type

curl -L --resolve cafe.example.com:$GW_PORT:$GW_IP http://cafe.example.com:$GW_PORT/tea/type\?test\=v1 --include
Handling connection for 8080
HTTP/1.1 302 Moved Temporarily
Server: nginx
Date: Mon, 06 Jan 2025 16:45:18 GMT
Content-Type: text/html
Content-Length: 138
Connection: keep-alive
Location: http://cafe.example.com:8080/organic/type?test=v1

Server address: 10.244.0.73:8080
Server name: tea-7b7d6c947d-s8djx
Date: 06/Jan/2025:16:45:18 +0000
URI: /organic/type?test=v1
Request ID: 74b1c95d02d9c07710672c6ea9690824

curl -L --resolve cafe.example.com:$GW_PORT:$GW_IP http://cafe.example.com:$GW_PORT/soda --include
Handling connection for 8080
HTTP/1.1 302 Moved Temporarily
Server: nginx
Date: Mon, 06 Jan 2025 16:46:00 GMT
Content-Type: text/html
Content-Length: 138
Connection: keep-alive
Location: http://cafe.example.com:8080/flavors

curl -L --resolve cafe.example.com:$GW_PORT:$GW_IP http://cafe.example.com:$GW_PORT/soda/pepsi --include
Handling connection for 8080
HTTP/1.1 302 Moved Temporarily
Server: nginx
Date: Mon, 06 Jan 2025 16:46:29 GMT
Content-Type: text/html
Content-Length: 138
Connection: keep-alive
Location: http://cafe.example.com:8080/flavors

curl -L --resolve cafe.example.com:$GW_PORT:$GW_IP http://cafe.example.com:$GW_PORT/soda/pepsi\?test\=v1 --include
Handling connection for 8080
HTTP/1.1 302 Moved Temporarily
Server: nginx
Date: Mon, 06 Jan 2025 16:53:24 GMT
Content-Type: text/html
Content-Length: 138
Connection: keep-alive
Location: http://cafe.example.com:8080/flavors?test=v1

Server address: 10.244.0.74:8080
Server name: soda-7c76d95586-dnc4n
Date: 06/Jan/2025:16:53:24 +0000
URI: /flavors?test=v1
Request ID: ada01eabdcada8c32347b087971fb356

Please focus on (optional): If you any specific areas where you would like reviewers to focus their attention or provide
specific feedback, add them here.

Closes #1413

Checklist

Before creating a PR, run through this checklist and mark each as complete.

• I have read the CONTRIBUTING doc
• I have added tests that prove my fix is effective or that my feature works
• I have checked that all unit tests pass after adding my changes
• I have updated necessary documentation
• I have rebased my branch onto main
• I will ensure my PR is targeting the main branch and pulling from my branch from my own fork

Release notes

If this PR introduces a change that affects users and needs to be mentioned in the release notes,
please add a brief note that summarizes the change.

Add path field for RequestRedirect filter.

[github-actions]

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---

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.95%. Comparing base (3683b58) to head (17012b4).
Report is 14 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2979      +/-   ##
==========================================
+ Coverage   89.93%   89.95%   +0.02%     
==========================================
  Files         111      111              
  Lines       11423    11452      +29     
  Branches       50       50              
==========================================
+ Hits        10273    10302      +29     
  Misses       1089     1089              
  Partials       61       61              

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[kate-osborn]

Great work on this @salonichf5. Just a few suggestions.

[kate-osborn]

🚀

[sjberman]

Let's try to get @ADubhlaoich's approval as well if possible

[ADubhlaoich]

LGTM!