$ go run main.go
…/github.com/golang/protobuf/proto/buffer.go:11:2: cannot find package “google.golang.org/protobuf/encoding/prototext” in any of:
/usr/local/go/src/google.golang.org/protobuf/encoding/prototext (from $GOROOT)
/Users/chris/Go/src/google.golang.org/protobuf/encoding/prototext (from $GOPATH)
…/github.com/golang/protobuf/proto/buffer.go:12:2: cannot find package “google.golang.org/protobuf/encoding/protowire” in any of:
/usr/local/go/src/google.golang.org/protobuf/encoding/protowire (from $GOROOT)
/Users/chris/Go/src/google.golang.org/protobuf/encoding/protowire (from $GOPATH)
报错信息说的已经很明显了，就是调用包的时候找不到，所以我们需要对应下载。这里具体的操作方法是，从https://github.com/protocolbuffers/protobuf-go/tree/master/ 下载包，放到%GOPATH%google.golang.orgprotobuf下就可以。
mkdir google.golang.org
cd google.golang.org
git clone https://github.com/protocolbuffers/protobuf-go.git
mv protobuf-go protobuf
此时再次运行之前的启动命令就可以启动项目了～
