/
server.go
134 lines (128 loc) · 3.41 KB
/
server.go
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package protoc
import (
"fmt"
"html/template"
"os"
"path"
"path/filepath"
"runtime"
"strings"
template2 "github.com/douyu/jupiter/cmd/jupiter/protoc/template"
"github.com/douyu/jupiter/pkg/util/xcolor"
"github.com/emicklei/proto"
)
// GRPCServerGen ...
type GRPCServerGen struct {
rpcMeta *RPCMeta
}
//RPCMeta ...
type RPCMeta struct {
Service *proto.Service
Message []*proto.Message
RPC []*proto.RPC
Package *proto.Package
Prefix string //生成的GRPC server代码 import pb.go文件时的前缀
}
//NewGRPCServerGen construct a GRPCServerGen instance
func NewGRPCServerGen() *GRPCServerGen {
return &GRPCServerGen{rpcMeta: &RPCMeta{}}
}
// Parse IDL files
func (server *GRPCServerGen) parseProtoFile(protoFilePath string) (err error) {
reader, err := os.Open(protoFilePath)
defer reader.Close()
if err != nil {
return
}
parser := proto.NewParser(reader)
definition, err := parser.Parse()
if err != nil {
return
}
proto.Walk(definition,
proto.WithService(server.handleService),
proto.WithMessage(server.handleMessage),
proto.WithRPC(server.handleRPC),
proto.WithPackage(server.handlePackage))
return
}
func (server *GRPCServerGen) handlePackage(pkg *proto.Package) {
server.rpcMeta.Package = pkg
}
func (server *GRPCServerGen) handleRPC(rpc *proto.RPC) {
server.rpcMeta.RPC = append(server.rpcMeta.RPC, rpc)
}
func (server *GRPCServerGen) handleService(s *proto.Service) {
server.rpcMeta.Service = s
}
func (server *GRPCServerGen) handleMessage(m *proto.Message) {
server.rpcMeta.Message = append(server.rpcMeta.Message, m)
}
func (server *GRPCServerGen) generateServer() (err error) {
if server.rpcMeta == nil {
return
}
if err = server.initPrefix(); err != nil {
return
}
if err = server.parseProtoFile(option.protoFilePath); err != nil {
return
}
outPut := filepath.Join(option.outputDir, server.rpcMeta.Package.Name)
if err = os.MkdirAll(outPut, 0755); err != nil {
return
}
fileName := fmt.Sprintf("%sServer.go", server.rpcMeta.Service.Name)
fileName = Lcfirst(fileName)
filePath := path.Join(outPut, fileName)
file, err1 := os.OpenFile(filePath, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0755)
if err1 != nil {
err = err1
return
}
defer file.Close()
filePath, _ = filepath.Abs(filePath)
err1 = server.render(file, template2.GRPCServerTemplate, server.rpcMeta)
if err != nil {
err = err1
return
}
fmt.Println(xcolor.Greenf("GRCP server file generate success ,the path :", filePath))
return
}
func (server *GRPCServerGen) initPrefix() (err error) {
if option.prefix != "" {
server.rpcMeta.Prefix = option.prefix
return
}
goPath := os.Getenv("GOPATH")
execFilePath, err := filepath.Abs(os.Args[0])
if err != nil {
return
}
if runtime.GOOS == "windows" {
execFilePath = strings.Replace(execFilePath, "\\", "/", -1)
goPath = strings.Replace(goPath, "\\", "/", -1)
}
lastIdx := strings.LastIndex(execFilePath, "/")
if lastIdx < 0 {
return
}
output := strings.ToLower(execFilePath[0:lastIdx])
srcPath := path.Join(goPath, "src/")
if srcPath[len(srcPath)-1] != '/' {
srcPath = fmt.Sprintf("%s/", srcPath)
}
server.rpcMeta.Prefix = strings.Replace(output, strings.ToLower(srcPath), "", -1)
fmt.Printf("rpcMeta.Prefix:%s\n", server.rpcMeta.Prefix)
return
}
func (server *GRPCServerGen) render(file *os.File, data string, rpcMeta *RPCMeta) (err error) {
t := template.New("main")
t, err = t.Parse(data)
err = t.Execute(file, rpcMeta)
if err != nil {
return
}
return
}