posts/go/grpc/2018-09-23-client-and-server/

[utterances-bot]

「连载二」gRPC Client and Server

https://eddycjy.com/posts/go/grpc/2018-09-23-client-and-server/

[happychenleilei]

go get -u github.com/golang/protobuf/protoc-gen-go 报错：
go: module github.com/golang/protobuf is deprecated: Use the "google.golang.org/protobuf" module instead.

解决方案：go get -u google.golang.org/protobuf/cmd/protoc-gen-go@latest

[happychenleilei]

运行 protoc --go_out=. *.proto 报错：
protoc-gen-go: unable to determine Go import path for "search.proto"
Please specify either:
• a "go_package" option in the .proto source file, or
• a "M" argument on the command line.

解决方案：
search.proto文件加入option go_package ="./";

[BeardLeon]

运行protoc --go-grpc_out=. *.proto 报错：
protoc-gen-go-grpc: program not found or is not executable
Please specify a program using absolute path or make sure the program is available in your PATH system variable
--go-grpc_out: protoc-gen-go-grpc: Plugin failed with status code 1.

解决方案：go install google.golang.org/grpc/cmd/protoc-gen-go-grpc@latest

[qgwyspks]

应该运行 protoc --go_out=. --go-grpc=. *.proto

[abrahamhwj]

https://grpc.io/docs/languages/go/quickstart/#regenerate-grpc-code

[kangxuan]

随着时间的推移，安装更新的protocolbuffers会出现一些问题：
比如 protocolbuffers 3.21.12 ，安装环境：MacOS

wget https://github.com/protocolbuffers/protobuf/releases/download/v21.12/protobuf-all-21.12.zip
unzip protobuf-all-21.12.zip
cd protobuf-all-21.12
./configure && make && make install
注意这里如果报错：C compiler cannot create executables
我的问题没有按照Xcode，通过AppStore安装就能解决

安装 protoc-gen-go
go install google.golang.org/protobuf/cmd/protoc-gen-go@latest

安装 protoc-gen-go-grpc
go install google.golang.org/grpc/cmd/protoc-gen-go-grpc@latest

生成 proto文件
cd proto && protoc --go_out=. --go-grpc_out=. *.proto
会生成2个文件：search.pb.go和search_grpc.pb.go
注意有报错：protoc-gen-go: unable to determine Go import path for "search.proto"
需要在search.proto文件中加入代码：
option go_package ="./";

server.go
pb.RegisterSearchServiceServer(server, &SearchService{})

报错：it has a non-exported method and is defined in a different package

解决方案：

type SearchService struct {
pb.UnimplementedSearchServiceServer
}