micro/server/grpc/options.go
Vasiliy Tolstov 58598d0fe0
fixes for safe conversation and avoid panics (#1213)
* fixes for safe convertation

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

* fix client publish panic

If broker connect returns error we dont check it status and use
it later to publish message, mostly this is unexpected because
broker connection failed and we cant use it.
Also proposed solution have benefit - we flag connection status
only when we have succeseful broker connection

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

* api/handler/broker: fix possible broker publish panic

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>
2020-02-18 23:05:38 +00:00

80 lines
2.0 KiB
Go

package grpc
import (
"context"
"crypto/tls"
"net"
"github.com/micro/go-micro/v2/broker"
"github.com/micro/go-micro/v2/codec"
"github.com/micro/go-micro/v2/registry"
"github.com/micro/go-micro/v2/server"
"github.com/micro/go-micro/v2/transport"
"google.golang.org/grpc"
"google.golang.org/grpc/encoding"
)
type codecsKey struct{}
type grpcOptions struct{}
type netListener struct{}
type maxMsgSizeKey struct{}
type tlsAuth struct{}
// gRPC Codec to be used to encode/decode requests for a given content type
func Codec(contentType string, c encoding.Codec) server.Option {
return func(o *server.Options) {
codecs := make(map[string]encoding.Codec)
if o.Context == nil {
o.Context = context.Background()
}
if v, ok := o.Context.Value(codecsKey{}).(map[string]encoding.Codec); ok && v != nil {
codecs = v
}
codecs[contentType] = c
o.Context = context.WithValue(o.Context, codecsKey{}, codecs)
}
}
// AuthTLS should be used to setup a secure authentication using TLS
func AuthTLS(t *tls.Config) server.Option {
return setServerOption(tlsAuth{}, t)
}
// Listener specifies the net.Listener to use instead of the default
func Listener(l net.Listener) server.Option {
return setServerOption(netListener{}, l)
}
// Options to be used to configure gRPC options
func Options(opts ...grpc.ServerOption) server.Option {
return setServerOption(grpcOptions{}, opts)
}
//
// MaxMsgSize set the maximum message in bytes the server can receive and
// send. Default maximum message size is 4 MB.
//
func MaxMsgSize(s int) server.Option {
return setServerOption(maxMsgSizeKey{}, s)
}
func newOptions(opt ...server.Option) server.Options {
opts := server.Options{
Codecs: make(map[string]codec.NewCodec),
Metadata: map[string]string{},
Broker: broker.DefaultBroker,
Registry: registry.DefaultRegistry,
Transport: transport.DefaultTransport,
Address: server.DefaultAddress,
Name: server.DefaultName,
Id: server.DefaultId,
Version: server.DefaultVersion,
}
for _, o := range opt {
o(&opts)
}
return opts
}