Add examples with valid and invalid header values

Signed-off-by: Norwin Schnyder <[email protected]>

Author: snorwin

examples/experimental/http-response-header.yaml

@@ -20,6 +20,8 @@ spec:
           value: header-add-2
         - name: X-Header-Add-3
           value: header-add-3
+        - name: Content-Disposition
+          value: "attachment; filename=\"example_file.txt\""
     backendRefs:
     - name: echo
       port: 8080

hack/invalid-examples/experimental/httproute/invalid-header-value.yaml

@@ -0,0 +1,12 @@
+apiVersion: gateway.networking.k8s.io/v1
+kind: HTTPRoute
+metadata:
+  name: invalid-header-value
+spec:
+  rules:
+  - filters:
+    - type: ResponseHeaderModifier
+      responseHeaderModifier:
+        add:
+        - name: X-Test-Header
+          value: "this\nis\rinvalid\r\nvalue"

pkg/generator/main.go

@@ -225,7 +225,7 @@ func gatewayTweaks(channel string, name string, jsonProps apiext.JSONSchemaProps
 			if len(patternMatch) != 2 {
 				log.Fatalf("Invalid %s Pattern tag for %s", validationPrefix, name)
 			}
-			
+
 			numValid++
 			jsonProps.Pattern = patternMatch[1]
 		}