GRPC oneof client参数请求

Oneof Fields

For this message with a oneof field:

package account;
message Profile {
  oneof avatar {
    string image_url = 1;
    bytes image_data = 2;
  }
}

the compiler generates the structs:

type Profile struct {
        // Types that are valid to be assigned to Avatar:
        //      *Profile_ImageUrl
        //      *Profile_ImageData
        Avatar isProfile_Avatar `protobuf_oneof:"avatar"`
}

type Profile_ImageUrl struct {
        ImageUrl string
}
type Profile_ImageData struct {
        ImageData []byte
}

Both *Profile_ImageUrl and *Profile_ImageData implement isProfile_Avatar by providing an empty isProfile_Avatar() method.

The following example shows how to set the field:

p1 := &account.Profile{
  Avatar: &account.Profile_ImageUrl{"http://example.com/image.png"},
}

// imageData is []byte
imageData := getImageData()
p2 := &account.Profile{
  Avatar: &account.Profile_ImageData{imageData},
}