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grpc.go
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grpc.go
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package grpc
import (
"fmt"
"strings"
)
// ServiceMethod converts a gRPC method to a Go method
// Input:
// Foo.Bar, /Foo/Bar, /package.Foo/Bar, /a.package.Foo/Bar
// Output:
// [Foo, Bar]
func ServiceMethod(m string) (string, string, error) {
if len(m) == 0 {
return "", "", fmt.Errorf("malformed method name: %q", m)
}
// grpc method
if m[0] == '/' {
// [ , Foo, Bar]
// [ , package.Foo, Bar]
// [ , a.package.Foo, Bar]
parts := strings.Split(m, "/")
if len(parts) != 3 || len(parts[1]) == 0 || len(parts[2]) == 0 {
return "", "", fmt.Errorf("malformed method name: %q", m)
}
service := strings.Split(parts[1], ".")
return service[len(service)-1], parts[2], nil
}
// non grpc method
parts := strings.Split(m, ".")
// expect [Foo, Bar]
if len(parts) != 2 {
return "", "", fmt.Errorf("malformed method name: %q", m)
}
return parts[0], parts[1], nil
}
// ServiceFromMethod returns the service
// /service.Foo/Bar => service
func ServiceFromMethod(m string) string {
if len(m) == 0 {
return m
}
if m[0] != '/' {
return m
}
parts := strings.Split(m, "/")
if len(parts) < 3 {
return m
}
parts = strings.Split(parts[1], ".")
return strings.Join(parts[:len(parts)-1], ".")
}