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option.go
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option.go
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// Copyright 2023 The PipeCD Authors.
//
// 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
//
// http://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 rpcclient
import (
"context"
"google.golang.org/grpc"
"google.golang.org/grpc/credentials"
)
type option struct {
tls bool
certFile string
requestValidationInterceptor bool
options []grpc.DialOption
}
type DialOption func(*option)
func WithBlock() DialOption {
return func(o *option) {
o.options = append(o.options, grpc.WithBlock())
}
}
func WithTLS(certFile string) DialOption {
return func(o *option) {
o.tls = true
o.certFile = certFile
}
}
func WithTransportCredentials(creds credentials.TransportCredentials) DialOption {
return func(o *option) {
o.options = append(o.options, grpc.WithTransportCredentials(creds))
}
}
func WithInsecure() DialOption {
return func(o *option) {
o.options = append(o.options, grpc.WithInsecure())
}
}
func WithRequestValidationInterceptor() DialOption {
return func(o *option) {
o.requestValidationInterceptor = true
}
}
func WithPerRPCCredentials(creds credentials.PerRPCCredentials) DialOption {
return func(o *option) {
o.options = append(o.options, grpc.WithPerRPCCredentials(creds))
}
}
func WithMaxRecvMsgSize(m int) DialOption {
return func(o *option) {
o.options = append(o.options, grpc.WithMaxMsgSize(m))
}
}
func DialOptions(opts ...DialOption) ([]grpc.DialOption, error) {
o := &option{
options: []grpc.DialOption{},
}
for _, opt := range opts {
opt(o)
}
if o.tls {
cred, err := credentials.NewClientTLSFromFile(o.certFile, "")
if err != nil {
return nil, err
}
o.options = append(o.options, grpc.WithTransportCredentials(cred))
}
if o.requestValidationInterceptor {
o.options = append(o.options, grpc.WithUnaryInterceptor(RequestValidationUnaryClientInterceptor()))
}
return o.options, nil
}
func DialContext(ctx context.Context, addr string, opts ...DialOption) (*grpc.ClientConn, error) {
options, err := DialOptions(opts...)
if err != nil {
return nil, err
}
return grpc.DialContext(ctx, addr, options...)
}