Support configuring RESTAPI to GRPC via HTTPFilterPolicy

controller/internal/translation/testdata/plugins/grpc_json_transcoder.in.yml

@@ -0,0 +1,21 @@
+apiVersion: htnn.mosn.io/v1
+kind: HTTPFilterPolicy
+metadata:
+  name: policy
+  namespace: default
+spec:
+  targetRef:
+    group: networking.istio.io
+    kind: VirtualService
+    name: default
+  filters:
+    grpcJsonTranscoder:
+      config:
+        protoDescriptor: protos/helloworld.pb
+        services:
+          - helloworld.Greeter
+        printOptions:
+          addWhitespace: true
+          alwaysPrintPrimitiveFields: true
+          alwaysPrintEnumsAsInts: false
+          preserveProtoFieldNames: false

controller/internal/translation/testdata/plugins/grpc_json_transcoder.out.yml

@@ -0,0 +1,51 @@
+- metadata:
+    creationTimestamp: null
+    name: htnn-h-default.local
+    namespace: default
+  spec:
+    configPatches:
+    - applyTo: HTTP_ROUTE
+      match:
+        routeConfiguration:
+          vhost:
+            name: default.local:80
+            route:
+              name: default/default
+      patch:
+        operation: MERGE
+        value:
+          typed_per_filter_config:
+            htnn.filters.http.grpcJsonTranscoder:
+              '@type': type.googleapis.com/envoy.extensions.filters.http.grpc_json_transcoder.v3.GrpcJsonTranscoder
+              printOptions:
+                addWhitespace: true
+                alwaysPrintEnumsAsInts: false
+                alwaysPrintPrimitiveFields: true
+                preserveProtoFieldNames: false
+              protoDescriptor: protos/helloworld.pb
+              services:
+              - helloworld.Greeter
+  status: {}
+- metadata:
+    creationTimestamp: null
+    name: htnn-http-filter
+    namespace: istio-system
+  spec:
+    configPatches:
+    - applyTo: HTTP_FILTER
+      match:
+        listener:
+          filterChain:
+            filter:
+              name: envoy.filters.network.http_connection_manager
+              subFilter:
+                name: envoy.filters.http.router
+      patch:
+        operation: INSERT_BEFORE
+        value:
+          disabled: true
+          name: htnn.filters.http.grpcJsonTranscoder
+          typed_config:
+            '@type': type.googleapis.com/envoy.extensions.filters.http.grpc_json_transcoder.v3.GrpcJsonTranscoder
+    priority: -10
+  status: {}

controller/plugins/grpc_json_transcoder/config.go

@@ -0,0 +1,48 @@
+// Copyright The HTNN Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//	http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package grpc_json_transcoder
+
+import (
+	"mosn.io/htnn/api/pkg/plugins"
+	"mosn.io/htnn/types/plugins/grpc_json_transcoder"
+)
+
+const (
+	Name = "grpcJsonTranscoder"
+)
+
+func init() {
+	plugins.RegisterHttpPlugin(Name, &plugin{})
+}
+
+type plugin struct {
+	grpc_json_transcoder.Plugin
+}
+
+// Each Native plugin need to implement the methods below
+
+// RouteConfigTypeURL returns the type url of per-route config
+func (p *plugin) RouteConfigTypeURL() string {
+	return "type.googleapis.com/envoy.extensions.filters.http.grpc_json_transcoder.v3.GrpcJsonTranscoder"
+}
+
+// HTTPFilterConfigPlaceholder returns the placeholder config for http filter
+func (p *plugin) HTTPFilterConfigPlaceholder() map[string]interface{} {
+	return map[string]interface{}{
+		"typed_config": map[string]interface{}{
+			"@type": p.RouteConfigTypeURL(),
+		},
+	}
+}

controller/plugins/plugins.go

@@ -20,6 +20,7 @@ import (
 	_ "mosn.io/htnn/controller/plugins/cors"
 	_ "mosn.io/htnn/controller/plugins/ext_proc"
 	_ "mosn.io/htnn/controller/plugins/fault"
+	_ "mosn.io/htnn/controller/plugins/grpc_json_transcoder"
 	_ "mosn.io/htnn/controller/plugins/local_ratelimit"
 	_ "mosn.io/htnn/controller/plugins/lua"
 	_ "mosn.io/htnn/types/plugins"

types/plugins/grpc_json_transcoder/config.go

@@ -0,0 +1,48 @@
+// Copyright The HTNN Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package grpc_json_transcoder
+
+import (
+	grpc_json_transcoder "github.com/envoyproxy/go-control-plane/envoy/extensions/filters/http/grpc_json_transcoder/v3"
+
+	"mosn.io/htnn/api/pkg/filtermanager/api"
+	"mosn.io/htnn/api/pkg/plugins"
+)
+
+const (
+	Name = "grpcJsonTranscoder"
+)
+
+func init() {
+	plugins.RegisterHttpPluginType(Name, &Plugin{})
+}
+
+type Plugin struct {
+	plugins.PluginMethodDefaultImpl
+}
+
+func (p *Plugin) Type() plugins.PluginType {
+	return plugins.TypeTraffic
+}
+
+func (p *Plugin) Order() plugins.PluginOrder {
+	return plugins.PluginOrder{
+		Position: plugins.OrderPositionInner,
+	}
+}
+
+func (p *Plugin) Config() api.PluginConfig {
+	return &grpc_json_transcoder.GrpcJsonTranscoder{}
+}