feat(wasm-go): add field reroute to disable route reselection (#2739)

test/e2e/conformance/tests/go-wasm-transformer.go

@@ -575,6 +575,63 @@ var WasmPluginsTransformer = suite.ConformanceTest{
 					},
 				},
 			},
+			{
+				Meta: http.AssertionMeta{
+					TestCaseName:    "case 16: request reroute",
+					TargetBackend:   "infra-backend-v1",
+					TargetNamespace: "higress-conformance-infra",
+				},
+				Request: http.AssertionRequest{
+					ActualRequest: http.Request{
+						Host: "foo16.com",
+						Path: "/get",
+						Headers: map[string]string{
+							"reroute": "false",
+						},
+					},
+					ExpectedRequest: &http.ExpectedRequest{
+						Request: http.Request{
+							Host:    "foo16.reroute.com",
+							Path:    "/get",
+							Headers: map[string]string{"reroute": "true"},
+						},
+					},
+				},
+				Response: http.AssertionResponse{
+					ExpectedResponse: http.Response{
+						StatusCode: 200,
+					},
+				},
+			},
+			{
+				Meta: http.AssertionMeta{
+					TestCaseName:    "case 17: request non reroute",
+					TargetBackend:   "infra-backend-v1",
+					TargetNamespace: "higress-conformance-infra",
+				},
+				Request: http.AssertionRequest{
+					ActualRequest: http.Request{
+						Host: "foo17.com",
+						Path: "/get",
+						Headers: map[string]string{
+							"reroute": "false",
+						},
+					},
+					ExpectedRequest: &http.ExpectedRequest{
+						Request: http.Request{
+							Host: "foo17.non-reroute.com",
+							Path: "/get",
+							// although the header was replaced, it was not rerouted
+							Headers: map[string]string{"reroute": "true"},
+						},
+					},
+				},
+				Response: http.AssertionResponse{
+					ExpectedResponse: http.Response{
+						StatusCode: 200,
+					},
+				},
+			},
 		}
 		t.Run("WasmPlugin transformer", func(t *testing.T) {
 			for _, testcase := range testcases {

test/e2e/conformance/tests/go-wasm-transformer.yaml

@@ -312,6 +312,94 @@ spec:
                 port:
                   number: 8080
 ---
+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+  name: wasmplugin-transform-request-reroute-root
+  namespace: higress-conformance-infra
+  annotations:
+    higress.io/exact-match-header-reroute: "false"
+    higress.io/upstream-vhost: "foo16.non-reroute.com"
+spec:
+  ingressClassName: higress
+  rules:
+    - host: "foo16.com"
+      http:
+        paths:
+          - pathType: Prefix
+            path: "/"
+            backend:
+              service:
+                name: infra-backend-v1
+                port:
+                  number: 8080
+---
+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+  name: wasmplugin-transform-request-reroute
+  namespace: higress-conformance-infra
+  annotations:
+    higress.io/exact-match-header-reroute: "true"
+    higress.io/upstream-vhost: "foo16.reroute.com"
+spec:
+  ingressClassName: higress
+  rules:
+    - host: "foo16.com"
+      http:
+        paths:
+          - pathType: Prefix
+            path: "/"
+            backend:
+              service:
+                name: infra-backend-v1
+                port:
+                  number: 8080
+---
+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+  name: wasmplugin-transform-request-non-reroute-root
+  namespace: higress-conformance-infra
+  annotations:
+    higress.io/exact-match-header-reroute: "false"
+    higress.io/upstream-vhost: "foo17.non-reroute.com"
+spec:
+  ingressClassName: higress
+  rules:
+    - host: "foo17.com"
+      http:
+        paths:
+          - pathType: Prefix
+            path: "/"
+            backend:
+              service:
+                name: infra-backend-v1
+                port:
+                  number: 8080
+---
+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+  name: wasmplugin-transform-request-non-reroute
+  namespace: higress-conformance-infra
+  annotations:
+    higress.io/exact-match-header-reroute: "true"
+    higress.io/upstream-vhost: "foo17.reroute.com"
+spec:
+  ingressClassName: higress
+  rules:
+    - host: "foo17.com"
+      http:
+        paths:
+          - pathType: Prefix
+            path: "/"
+            backend:
+              service:
+                name: infra-backend-v1
+                port:
+                  number: 8080
+---
 apiVersion: extensions.higress.io/v1alpha1
 kind: WasmPlugin
 metadata:
@@ -751,4 +839,25 @@ spec:
             body:
               - key: X-replace-body
                 newValue: exist-body
+
+    - ingress:
+        - higress-conformance-infra/wasmplugin-transform-request-reroute-root
+      configDisable: false
+      config:
+        reqRules:
+          - operate: replace
+            headers:
+              - key: reroute
+                newValue: true
+
+    - ingress:
+        - higress-conformance-infra/wasmplugin-transform-request-non-reroute-root
+      configDisable: false
+      config:
+        reroute: false
+        reqRules:
+          - operate: replace
+            headers:
+              - key: reroute
+                newValue: true
   url: file:///opt/plugins/wasm-go/extensions/transformer/plugin.wasm