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add server interface interceptors

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Signed-off-by: Adphi <philippe.adrien.nousse@gmail.com>
This commit is contained in:
Adphi 2022-07-15 15:48:09 +02:00
parent bb7e4b124b
commit 6e86120943
Signed by: adphi
GPG Key ID: 46BE4062DB2397FF
5 changed files with 147 additions and 22 deletions
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47
example/example.go
View File

@ -14,6 +14,7 @@ import (
"github.com/prometheus/client_golang/prometheus/promhttp"
"github.com/spf13/cobra"
"google.golang.org/grpc"
"google.golang.org/grpc/health/grpc_health_v1"
"google.golang.org/grpc/metadata"
greflectsvc "google.golang.org/grpc/reflection/grpc_reflection_v1alpha"
"google.golang.org/protobuf/proto"
@ -22,12 +23,18 @@ import (
"go.linka.cloud/grpc/client"
"go.linka.cloud/grpc/interceptors/auth"
"go.linka.cloud/grpc/interceptors/defaulter"
"go.linka.cloud/grpc/interceptors/iface"
metrics2 "go.linka.cloud/grpc/interceptors/metrics"
validation2 "go.linka.cloud/grpc/interceptors/validation"
"go.linka.cloud/grpc/logger"
"go.linka.cloud/grpc/service"
)
var (
_ iface.UnaryInterceptor = (*GreeterHandler)(nil)
_ iface.StreamInterceptor = (*GreeterHandler)(nil)
)
type GreeterHandler struct {
UnimplementedGreeterServer
}
@ -50,6 +57,20 @@ func (g *GreeterHandler) SayHelloStream(req *HelloStreamRequest, s Greeter_SayHe
return nil
}
func (g *GreeterHandler) UnaryServerInterceptor() grpc.UnaryServerInterceptor {
return func(ctx context.Context, req interface{}, info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (resp interface{}, err error) {
logger.C(ctx).Infof("called service interface unary interceptor")
return handler(ctx, req)
}
}
func (g *GreeterHandler) StreamServerInterceptor() grpc.StreamServerInterceptor {
return func(srv interface{}, ss grpc.ServerStream, info *grpc.StreamServerInfo, handler grpc.StreamHandler) error {
logger.C(ss.Context()).Infof("called service interface stream interceptor")
return handler(srv, ss)
}
}
func httpLogger(next http.Handler) http.Handler {
return http.HandlerFunc(func(writer http.ResponseWriter, request *http.Request) {
start := time.Now()
@ -115,14 +136,18 @@ func run(opts ...service.Option) {
service.WithGRPCWebPrefix("/grpc"),
service.WithMiddlewares(httpLogger),
service.WithInterceptors(metrics),
service.WithServerInterceptors(auth.NewServerInterceptors(auth.WithBasicValidators(func(ctx context.Context, user, password string) (context.Context, error) {
if !auth.Equals(user, "admin") || !auth.Equals(password, "admin") {
return ctx, fmt.Errorf("invalid user or password")
}
log.Infof("request authenticated")
return ctx, nil
}))),
service.WithServerInterceptors(
auth.NewServerInterceptors(auth.WithBasicValidators(func(ctx context.Context, user, password string) (context.Context, error) {
if !auth.Equals(user, "admin") || !auth.Equals(password, "admin") {
return ctx, fmt.Errorf("invalid user or password")
}
log.Infof("request authenticated")
return ctx, nil
})),
),
service.WithInterceptors(defaulter, validation),
// enable server interface interceptor
service.WithServerInterceptors(iface.New()),
)
svc, err = service.New(opts...)
if err != nil {
@ -158,7 +183,13 @@ func run(opts ...service.Option) {
log.Fatal(err)
}
g := NewGreeterClient(s)
defer cancel()
h := grpc_health_v1.NewHealthClient(s)
hres, err := h.Check(ctx, &grpc_health_v1.HealthCheckRequest{})
if err != nil {
log.Fatal(err)
}
log.Infof("status: %v", hres.Status)
md := metadata.MD{}
res, err := g.SayHello(ctx, &HelloRequest{Name: "test"}, grpc.Header(&md))
if err != nil {

41
interceptors/iface/interceptors.go Normal file
View File

@ -0,0 +1,41 @@
package iface
import (
"context"
"google.golang.org/grpc"
"go.linka.cloud/grpc/interceptors"
)
type UnaryInterceptor interface {
UnaryServerInterceptor() grpc.UnaryServerInterceptor
}
type StreamInterceptor interface {
StreamServerInterceptor() grpc.StreamServerInterceptor
}
type iface struct{}
func New() interceptors.ServerInterceptors {
return &iface{}
}
func (s iface) UnaryServerInterceptor() grpc.UnaryServerInterceptor {
return func(ctx context.Context, req interface{}, info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (resp interface{}, err error) {
if i, ok := info.Server.(UnaryInterceptor); ok {
return i.UnaryServerInterceptor()(ctx, req, info, handler)
}
return handler(ctx, req)
}
}
func (s iface) StreamServerInterceptor() grpc.StreamServerInterceptor {
return func(srv interface{}, ss grpc.ServerStream, info *grpc.StreamServerInfo, handler grpc.StreamHandler) error {
if i, ok := srv.(StreamInterceptor); ok {
return i.StreamServerInterceptor()(srv, ss, info, handler)
}
return handler(srv, ss)
}
}

39
interceptors/noop/interceptors.go Normal file
View File

@ -0,0 +1,39 @@
package noop
import (
"context"
"google.golang.org/grpc"
"go.linka.cloud/grpc/interceptors"
)
func New() interceptors.Interceptors {
return &noopInterceptor{}
}
type noopInterceptor struct{}
func (m *noopInterceptor) UnaryServerInterceptor() grpc.UnaryServerInterceptor {
return func(ctx context.Context, req interface{}, info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (resp interface{}, err error) {
return handler(ctx, req)
}
}
func (m *noopInterceptor) StreamServerInterceptor() grpc.StreamServerInterceptor {
return func(srv interface{}, ss grpc.ServerStream, info *grpc.StreamServerInfo, handler grpc.StreamHandler) error {
return handler(srv, ss)
}
}
func (m *noopInterceptor) UnaryClientInterceptor() grpc.UnaryClientInterceptor {
return func(ctx context.Context, method string, req, reply interface{}, cc *grpc.ClientConn, invoker grpc.UnaryInvoker, opts ...grpc.CallOption) error {
return invoker(ctx, method, req, reply, cc, opts...)
}
}
func (m *noopInterceptor) StreamClientInterceptor() grpc.StreamClientInterceptor {
return func(ctx context.Context, desc *grpc.StreamDesc, cc *grpc.ClientConn, method string, streamer grpc.Streamer, opts ...grpc.CallOption) (grpc.ClientStream, error) {
return streamer(ctx, desc, cc, method, opts...)
}
}

20
service/interceptors.go Normal file
View File

@ -0,0 +1,20 @@
package service
import (
"go.linka.cloud/grpc/interceptors"
"go.linka.cloud/grpc/interceptors/metadata"
)
func md(opts *options) interceptors.Interceptors {
var pairs []string
if opts.name != "" {
pairs = append(pairs, "grpc-service-name", opts.name)
}
if opts.version != "" {
pairs = append(pairs, "grpc-service-version", opts.version)
}
if len(pairs) != 0 {
return metadata.NewInterceptors(pairs...)
}
return nil
}

22
service/service.go
View File

@ -27,7 +27,6 @@ import (
"google.golang.org/grpc/health/grpc_health_v1"
greflect "google.golang.org/grpc/reflection"
"go.linka.cloud/grpc/interceptors/metadata"
"go.linka.cloud/grpc/logger"
"go.linka.cloud/grpc/registry"
"go.linka.cloud/grpc/registry/noop"
@ -76,20 +75,15 @@ func newService(opts ...Option) (*service, error) {
for _, f := range opts {
f(s.opts)
}
if s.opts.name != "" {
i := metadata.NewInterceptors("grpc-service-name", s.opts.name)
s.opts.unaryServerInterceptors = append([]grpc.UnaryServerInterceptor{i.UnaryServerInterceptor()}, s.opts.unaryServerInterceptors...)
s.opts.unaryClientInterceptors = append([]grpc.UnaryClientInterceptor{i.UnaryClientInterceptor()}, s.opts.unaryClientInterceptors...)
s.opts.streamServerInterceptors = append([]grpc.StreamServerInterceptor{i.StreamServerInterceptor()}, s.opts.streamServerInterceptors...)
s.opts.streamClientInterceptors = append([]grpc.StreamClientInterceptor{i.StreamClientInterceptor()}, s.opts.streamClientInterceptors...)
}
if s.opts.version != "" {
i := metadata.NewInterceptors("grpc-service-version", s.opts.version)
s.opts.unaryServerInterceptors = append([]grpc.UnaryServerInterceptor{i.UnaryServerInterceptor()}, s.opts.unaryServerInterceptors...)
s.opts.unaryClientInterceptors = append([]grpc.UnaryClientInterceptor{i.UnaryClientInterceptor()}, s.opts.unaryClientInterceptors...)
s.opts.streamServerInterceptors = append([]grpc.StreamServerInterceptor{i.StreamServerInterceptor()}, s.opts.streamServerInterceptors...)
s.opts.streamClientInterceptors = append([]grpc.StreamClientInterceptor{i.StreamClientInterceptor()}, s.opts.streamClientInterceptors...)
md := md(s.opts)
if md != nil {
s.opts.unaryServerInterceptors = append([]grpc.UnaryServerInterceptor{md.UnaryServerInterceptor()}, s.opts.unaryServerInterceptors...)
s.opts.unaryClientInterceptors = append([]grpc.UnaryClientInterceptor{md.UnaryClientInterceptor()}, s.opts.unaryClientInterceptors...)
s.opts.streamServerInterceptors = append([]grpc.StreamServerInterceptor{md.StreamServerInterceptor()}, s.opts.streamServerInterceptors...)
s.opts.streamClientInterceptors = append([]grpc.StreamClientInterceptor{md.StreamClientInterceptor()}, s.opts.streamClientInterceptors...)
}
if s.opts.mux == nil {
s.opts.mux = http.NewServeMux()
}