Xray-core/proxy/blackhole/config.go

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package blackhole
import (
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"github.com/xtls/xray-core/common"
"github.com/xtls/xray-core/common/buf"
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)
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 := c.GetResponse().GetInstance()
if err != nil {
return nil, err
}
return config.(ResponseConfig), nil
}