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// Copyright (c) The go-grpc-middleware Authors.
// Licensed under the Apache License 2.0.
package interceptors
import (
"fmt"
"strings"
"google.golang.org/grpc"
)
func splitFullMethodName(fullMethod string) (string, string) {
fullMethod = strings.TrimPrefix(fullMethod, "/") // remove leading slash
if i := strings.Index(fullMethod, "/"); i >= 0 {
return fullMethod[:i], fullMethod[i+1:]
}
return "unknown", "unknown"
}
type CallMeta struct {
ReqOrNil any
Typ GRPCType
Service string
Method string
IsClient bool
}
func NewClientCallMeta(fullMethod string, streamDesc *grpc.StreamDesc, reqOrNil any) CallMeta {
c := CallMeta{IsClient: true, ReqOrNil: reqOrNil, Typ: Unary}
if streamDesc != nil {
c.Typ = clientStreamType(streamDesc)
}
c.Service, c.Method = splitFullMethodName(fullMethod)
return c
}
func NewServerCallMeta(fullMethod string, streamInfo *grpc.StreamServerInfo, reqOrNil any) CallMeta {
c := CallMeta{IsClient: false, ReqOrNil: reqOrNil, Typ: Unary}
if streamInfo != nil {
c.Typ = serverStreamType(streamInfo)
}
c.Service, c.Method = splitFullMethodName(fullMethod)
return c
}
func (c CallMeta) FullMethod() string {
return fmt.Sprintf("/%s/%s", c.Service, c.Method)
}
func clientStreamType(desc *grpc.StreamDesc) GRPCType {
if desc.ClientStreams && !desc.ServerStreams {
return ClientStream
} else if !desc.ClientStreams && desc.ServerStreams {
return ServerStream
}
return BidiStream
}
func serverStreamType(info *grpc.StreamServerInfo) GRPCType {
if info.IsClientStream && !info.IsServerStream {
return ClientStream
} else if !info.IsClientStream && info.IsServerStream {
return ServerStream
}
return BidiStream
}
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