parse

type Field struct {
	Name      string // field name
	FieldType string // field type
	Comment   string // field comment
}

type PbService struct {
	Name      string           // Greeter
	LowerName string           // greeter first character to lower
	Methods   []*ServiceMethod // service methods

	CutServiceName      string // GreeterService --> Greeter
	LowerCutServiceName string // GreeterService --> greeter
}

type RPCMethod struct {
	Name       string // SayHello
	Num        int    // one rpc RPCMethod can correspond to multiple http requests
	Request    string // SayHelloReq
	Reply      string // SayHelloResp
	InvokeType int    // 0:unary, 1: client-side streaming, 2: server-side streaming, 3: bidirectional streaming

	// http_rule
	Path         string // rule
	Method       string // HTTP Method
	Body         string
	ResponseBody string
}

type ServiceMethod struct {
	MethodName    string // Create
	Request       string // CreateRequest
	RequestFields []*Field
	Reply         string // CreateReply
	ReplyFields   []*Field
	Comment       string // e.g. Create a record
	InvokeType    int    // 0:unary, 1: client-side streaming, 2: server-side streaming, 3: bidirectional streaming

	ServiceName         string // Greeter
	LowerServiceName    string // greeter first character to lower
	LowerCutServiceName string // GreeterService --> greeter

	// http_rule
	Path   string // rule
	Method string // HTTP Method
	Body   string
}