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ping.go
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ping.go
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// Copyright 2019 Google LLC
//
// 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
//
// https://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 main
import (
"context"
"fmt"
"log"
"os"
"strings"
pb "github.com/GoogleCloudPlatform/golang-samples/run/grpc-ping/pkg/api/v1"
"github.com/golang/protobuf/ptypes"
"google.golang.org/grpc/status"
)
type pingService struct {
pb.UnimplementedPingServiceServer
}
func (s *pingService) Send(ctx context.Context, req *pb.Request) (*pb.Response, error) {
log.Print("sending ping response")
return &pb.Response{
Pong: &pb.Pong{
Index: 1,
Message: req.GetMessage(),
ReceivedOn: ptypes.TimestampNow(),
},
}, nil
}
func (s *pingService) SendUpstream(ctx context.Context, req *pb.Request) (*pb.Response, error) {
if conn == nil {
return nil, fmt.Errorf("no upstream connection configured")
}
p := &pb.Request{
Message: req.GetMessage() + " (relayed)",
}
hostWithoutPort := strings.Split(os.Getenv("GRPC_PING_HOST"), ":")[0]
tokenAudience := "https://" + hostWithoutPort
resp, err := PingRequest(conn, p, tokenAudience, os.Getenv("GRPC_PING_UNAUTHENTICATED") == "")
if err != nil {
log.Printf("PingRequest: %q", err)
c := status.Code(err)
return nil, status.Errorf(c, "Could not reach ping service: %s", status.Convert(err).Message())
}
log.Print("received upstream pong")
return &pb.Response{
Pong: resp.Pong,
}, nil
}