/
protobuf.go
76 lines (69 loc) · 2.14 KB
/
protobuf.go
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// Copyright 2018 <xu shuai <dyxushuai@gmail.com>>
//
// 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 grpcdump
import (
"fmt"
"strings"
"github.com/jhump/protoreflect/desc"
"github.com/jhump/protoreflect/desc/protoparse"
"github.com/jhump/protoreflect/dynamic"
)
type protoFileDescs struct {
descs []*desc.FileDescriptor
}
func protoParse(importPaths []string, protoPaths ...string) (*protoFileDescs, error) {
p := &protoparse.Parser{
ImportPaths: importPaths,
}
descs, err := p.ParseFiles(protoPaths...)
if err != nil {
return nil, err
}
return &protoFileDescs{
descs: descs,
}, nil
}
func (p *protoFileDescs) pretty(data []byte, msg *desc.MessageDescriptor) (string, error) {
dmsg := dynamic.NewMessage(msg)
err := dmsg.Unmarshal(data)
if err != nil {
return "", err
}
result, err := dmsg.MarshalJSON()
if err != nil {
return "", err
}
return string(result), nil
}
func (p *protoFileDescs) findMehodSignature(path string) (*desc.MessageDescriptor, *desc.MessageDescriptor, error) {
strs := strings.Split(path, "/")
if len(strs) != 3 {
return nil, nil, fmt.Errorf("error path format: %s", path)
}
for _, desc := range p.descs {
// FindService parameter needs package.servcie
// e.g. helloworld.Greeter
srvDesc := desc.FindService(strs[1])
if srvDesc == nil {
// maybe in other files
continue
}
mtdDesc := srvDesc.FindMethodByName(strs[2])
if mtdDesc == nil {
return nil, nil, fmt.Errorf("method: %s not found in file: %s", strs[2], desc.GetName())
}
return mtdDesc.GetInputType(), mtdDesc.GetOutputType(), nil
}
return nil, nil, fmt.Errorf("grpc path: %s not found", path)
}