wellknown.go

// Copyright Envoy Gateway Authors
// SPDX-License-Identifier: Apache-2.0
// The full text of the Apache license is available in the LICENSE file at
// the root of the repo.

package filters

import (
	grpcstats "github.com/envoyproxy/go-control-plane/envoy/extensions/filters/http/grpc_stats/v3"
	grpcweb "github.com/envoyproxy/go-control-plane/envoy/extensions/filters/http/grpc_web/v3"
	httprouter "github.com/envoyproxy/go-control-plane/envoy/extensions/filters/http/router/v3"
	hcm "github.com/envoyproxy/go-control-plane/envoy/extensions/filters/network/http_connection_manager/v3"
	"github.com/envoyproxy/go-control-plane/pkg/wellknown"
	"google.golang.org/protobuf/types/known/wrapperspb"

	"github.com/envoyproxy/gateway/internal/utils/protocov"
)

var (
	GRPCWeb = &hcm.HttpFilter{
		Name: wellknown.GRPCWeb,
		ConfigType: &hcm.HttpFilter_TypedConfig{
			TypedConfig: protocov.ToAny(&grpcweb.GrpcWeb{}),
		},
	}
	GRPCStats = &hcm.HttpFilter{
		Name: wellknown.HTTPGRPCStats,
		ConfigType: &hcm.HttpFilter_TypedConfig{
			TypedConfig: protocov.ToAny(&grpcstats.FilterConfig{
				EmitFilterState: true,
				PerMethodStatSpecifier: &grpcstats.FilterConfig_StatsForAllMethods{
					StatsForAllMethods: &wrapperspb.BoolValue{Value: true},
				},
			}),
		},
	}
)

func GenerateRouterFilter(enableEnvoyHeaders bool) *hcm.HttpFilter {
	return &hcm.HttpFilter{
		Name: wellknown.Router,
		ConfigType: &hcm.HttpFilter_TypedConfig{
			TypedConfig: protocov.ToAny(&httprouter.Router{
				SuppressEnvoyHeaders: !enableEnvoyHeaders,
			}),
		},
	}
}