package blackhole import ( "github.com/v2fly/v2ray-core/v5/common" "github.com/v2fly/v2ray-core/v5/common/buf" "github.com/v2fly/v2ray-core/v5/common/serial" ) const ( http403response = `HTTP/1.1 403 Forbidden Connection: close Cache-Control: max-age=3600, public Content-Length: 0 ` ) // ResponseConfig is the configuration for blackhole responses. type ResponseConfig interface { // WriteTo writes predefined response to the give buffer. WriteTo(buf.Writer) int32 } // WriteTo implements ResponseConfig.WriteTo(). func (*NoneResponse) WriteTo(buf.Writer) int32 { return 0 } // WriteTo implements ResponseConfig.WriteTo(). func (*HTTPResponse) WriteTo(writer buf.Writer) int32 { b := buf.New() common.Must2(b.WriteString(http403response)) n := b.Len() writer.WriteMultiBuffer(buf.MultiBuffer{b}) return n } // GetInternalResponse converts response settings from proto to internal data structure. func (c *Config) GetInternalResponse() (ResponseConfig, error) { if c.GetResponse() == nil { return new(NoneResponse), nil } config, err := serial.GetInstanceOf(c.GetResponse()) if err != nil { return nil, err } return config.(ResponseConfig), nil }