HTTP method

Documentation

Traffic management

Request matching

HTTP method

Specify an HTTP method, such as POST, GET, PUT, PATCH, or DELETE, to match requests against.

For more information, see the Kubernetes Gateway API documentation.

Before you begin

Follow the Get started guide to install K8sGateway, set up a gateway resource, and deploy the httpbin sample app.

Get the external address of the gateway and save it in an environment variable.

export INGRESS_GW_ADDRESS=$(kubectl get svc -n gloo-system gloo-proxy-http -o jsonpath="{.status.loadBalancer.ingress[0]['hostname','ip']}")
echo $INGRESS_GW_ADDRESS

kubectl port-forward deployment/gloo-proxy-http -n gloo-system 8080:8080

Set up HTTP method matching

Create an HTTPRoute resource for the match.example domain that serves incoming GET requests for the httpbin app.

kubectl apply -f- <<EOF
apiVersion: gateway.networking.k8s.io/v1beta1
kind: HTTPRoute
metadata:
  name: httpbin-match
  namespace: httpbin
spec:
  parentRefs:
    - name: http
      namespace: gloo-system
  hostnames:
    - match.example
  rules:
    - matches:
      - method: "GET"
      backendRefs:
        - name: httpbin
          port: 8000
EOF

Send a GET request to the httpbin app on the match.example domain. Verify that you get back a 200 HTTP response code.

curl -vik http://$INGRESS_GW_ADDRESS:8080/get -H "host: match.example:8080"

curl -vik localhost:8080/get -H "host: match.example"

Example output:

* Mark bundle as not supporting multiuse
< HTTP/1.1 200 OK
HTTP/1.1 200 OK
< access-control-allow-credentials: true
access-control-allow-credentials: true
< access-control-allow-origin: *
access-control-allow-origin: *
< content-type: application/json; encoding=utf-8
content-type: application/json; encoding=utf-8
< date: Sat, 04 Nov 2023 03:34:12 GMT
date: Sat, 04 Nov 2023 03:34:12 GMT
< content-length: 422
content-length: 422
< x-envoy-upstream-service-time: 1
x-envoy-upstream-service-time: 1
< server: envoy
server: envoy

< 
{
  "args": {},
  "headers": {
    "Accept": [
      "*/*"
    ],
    "Host": [
      "match.example:8080"
    ],
    "User-Agent": [
      "curl/7.77.0"
    ],
    "X-Envoy-Expected-Rq-Timeout-Ms": [
      "15000"
    ],
    "X-Forwarded-Proto": [
      "http"
    ],
    "X-Request-Id": [
      "6823bc28-ba8e-47df-a3a0-1aa21628db0e"
    ]
  },
  "origin": "10.116.3.7:47022",
  "url": "http://match.example:8080/get"
}

Send another request to the httpbin app on the match.example domain. This time, you use the POST method. Verify that your request is not forwarded to the httpbin app and that you get back a 404 HTTP response code.

curl -vik -X POST http://$INGRESS_GW_ADDRESS:8080/post -H "host: match.example:8080"

curl -vik -X POST localhost:8080/post -H "host: match.example"

Example output:

* Mark bundle as not supporting multiuse
< HTTP/1.1 404 Not Found
HTTP/1.1 404 Not Found
< date: Tue, 23 Apr 2024 18:47:53 GMT
date: Tue, 23 Apr 2024 18:47:53 GMT
< server: envoy
server: envoy
< content-length: 0
content-length: 0 
...

Cleanup

You can remove the resources that you created in this guide.

kubectl delete httproute httpbin-match -n httpbin

Header Query parameter