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srv.go
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srv.go
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package grpcsrv
import (
"context"
"crypto/tls"
"errors"
"fmt"
"log"
"net"
"net/http"
"net/url"
"sync"
"time"
"github.com/wuqinqiang/easycar/tools"
"github.com/wuqinqiang/easycar/core/servers/httpsrv"
"google.golang.org/grpc/credentials"
"google.golang.org/grpc/credentials/insecure"
"github.com/fatih/color"
"github.com/grpc-ecosystem/grpc-gateway/v2/runtime"
"github.com/wuqinqiang/easycar/core/coordinator"
elog "github.com/wuqinqiang/easycar/logging"
"google.golang.org/grpc/reflection"
"github.com/wuqinqiang/easycar/proto"
"google.golang.org/grpc"
)
var (
_ proto.EasyCarServer = (*GrpcSrv)(nil)
ErrGIdNotExist = errors.New("gid is not exist")
)
type GrpcSrv struct {
proto.UnimplementedEasyCarServer
coordinator *coordinator.Coordinator
lis net.Listener
timeout time.Duration
listenOn string
once sync.Once
grpcOpts []grpc.ServerOption
grpcServer *grpc.Server
}
func New(settings Grpc, coordinator *coordinator.Coordinator) (*GrpcSrv, error) {
srv := &GrpcSrv{
coordinator: coordinator,
timeout: 10 * time.Second,
listenOn: tools.FigureOutListen(settings.ListenOn),
once: sync.Once{},
}
// setup tls
var (
err error
)
if settings.Tls() {
certificate, err := tls.LoadX509KeyPair(settings.CertFile, settings.KeyFile)
if err != nil {
log.Fatal(err)
}
tlsConf := &tls.Config{Certificates: []tls.Certificate{certificate}}
srv.grpcOpts = append(srv.grpcOpts, grpc.Creds(credentials.NewTLS(tlsConf)))
}
srv.grpcOpts = append(srv.grpcOpts, grpc.MaxRecvMsgSize(5*1024*1024)) //5M:max Recv msg size
srv.lis, err = net.Listen("tcp", srv.listenOn)
return srv, err
}
func (s *GrpcSrv) Run(ctx context.Context) error {
s.grpcServer = grpc.NewServer(s.grpcOpts...)
proto.RegisterEasyCarServer(s.grpcServer, s)
// for reflection
reflection.Register(s.grpcServer)
go func() {
if err := s.grpcServer.Serve(s.lis); err != nil {
log.Fatal(err)
}
}()
elog.Infof("[Grpc] grpc listen:%s", s.listenOn)
return nil
}
func (s *GrpcSrv) Handler(certFile, name string) httpsrv.Handler {
return func(ctx context.Context) (http.Handler, error) {
options := []grpc.DialOption{
grpc.WithBlock(),
}
var (
err error
)
creds := insecure.NewCredentials()
if certFile != "" {
creds, err = credentials.NewClientTLSFromFile(certFile, name)
if err != nil {
return nil, err
}
}
options = append(options, grpc.WithTransportCredentials(creds))
conn, err := grpc.DialContext(ctx, s.listenOn, options...) //todo replace
if err != nil {
fmt.Println(color.HiRedString("grpc DialContext:err:%v", err))
return nil, err
}
mux := runtime.NewServeMux()
err = proto.RegisterEasyCarHandler(ctx, mux, conn)
return mux, err
}
}
func (s *GrpcSrv) Stop(ctx context.Context) (err error) {
if s.grpcServer == nil {
return
}
s.once.Do(func() {
s.grpcServer.GracefulStop()
})
if err = s.coordinator.Close(ctx); err != nil {
return
}
elog.Infof("[GrpcSrv] stopped")
return
}
func (s *GrpcSrv) Endpoint() *url.URL {
return &url.URL{
Scheme: "grpc",
Host: s.listenOn,
}
}