micro/client/grpc/options.go
2019-10-10 13:55:16 +08:00

102 lines
2.5 KiB
Go

// Package grpc provides a gRPC options
package grpc
import (
"context"
"crypto/tls"
"github.com/micro/go-micro/client"
"google.golang.org/grpc"
"google.golang.org/grpc/encoding"
)
var (
// DefaultMaxRecvMsgSize maximum message that client can receive
// (4 MB).
DefaultMaxRecvMsgSize = 1024 * 1024 * 4
// DefaultMaxSendMsgSize maximum message that client can send
// (4 MB).
DefaultMaxSendMsgSize = 1024 * 1024 * 4
)
type codecsKey struct{}
type tlsAuth struct{}
type maxRecvMsgSizeKey struct{}
type maxSendMsgSizeKey struct{}
type grpcDialOptions struct{}
type grpcCallOptions struct{}
// gRPC Codec to be used to encode/decode requests for a given content type
func Codec(contentType string, c encoding.Codec) client.Option {
return func(o *client.Options) {
codecs := make(map[string]encoding.Codec)
if o.Context == nil {
o.Context = context.Background()
}
if v := o.Context.Value(codecsKey{}); v != nil {
codecs = v.(map[string]encoding.Codec)
}
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) client.Option {
return func(o *client.Options) {
if o.Context == nil {
o.Context = context.Background()
}
o.Context = context.WithValue(o.Context, tlsAuth{}, t)
}
}
//
// MaxRecvMsgSize set the maximum size of message that client can receive.
//
func MaxRecvMsgSize(s int) client.Option {
return func(o *client.Options) {
if o.Context == nil {
o.Context = context.Background()
}
o.Context = context.WithValue(o.Context, maxRecvMsgSizeKey{}, s)
}
}
//
// MaxSendMsgSize set the maximum size of message that client can send.
//
func MaxSendMsgSize(s int) client.Option {
return func(o *client.Options) {
if o.Context == nil {
o.Context = context.Background()
}
o.Context = context.WithValue(o.Context, maxSendMsgSizeKey{}, s)
}
}
//
// DialOptions to be used to configure gRPC dial options
//
func DialOptions(opts ...grpc.DialOption) client.CallOption {
return func(o *client.CallOptions) {
if o.Context == nil {
o.Context = context.Background()
}
o.Context = context.WithValue(o.Context, grpcDialOptions{}, opts)
}
}
//
// CallOptions to be used to configure gRPC call options
//
func CallOptions(opts ...grpc.CallOption) client.CallOption {
return func(o *client.CallOptions) {
if o.Context == nil {
o.Context = context.Background()
}
o.Context = context.WithValue(o.Context, grpcCallOptions{}, opts)
}
}