gotosocial/vendor/github.com/jackc/pgproto3/v2/cancel_request.go
tobi 2dc9fc1626
Pg to bun (#148)
* start moving to bun

* changing more stuff

* more

* and yet more

* tests passing

* seems stable now

* more big changes

* small fix

* little fixes
2021-08-25 15:34:33 +02:00

59 lines
1.3 KiB
Go

package pgproto3
import (
"encoding/binary"
"encoding/json"
"errors"
"github.com/jackc/pgio"
)
const cancelRequestCode = 80877102
type CancelRequest struct {
ProcessID uint32
SecretKey uint32
}
// Frontend identifies this message as sendable by a PostgreSQL frontend.
func (*CancelRequest) Frontend() {}
func (dst *CancelRequest) Decode(src []byte) error {
if len(src) != 12 {
return errors.New("bad cancel request size")
}
requestCode := binary.BigEndian.Uint32(src)
if requestCode != cancelRequestCode {
return errors.New("bad cancel request code")
}
dst.ProcessID = binary.BigEndian.Uint32(src[4:])
dst.SecretKey = binary.BigEndian.Uint32(src[8:])
return nil
}
// Encode encodes src into dst. dst will include the 4 byte message length.
func (src *CancelRequest) Encode(dst []byte) []byte {
dst = pgio.AppendInt32(dst, 16)
dst = pgio.AppendInt32(dst, cancelRequestCode)
dst = pgio.AppendUint32(dst, src.ProcessID)
dst = pgio.AppendUint32(dst, src.SecretKey)
return dst
}
// MarshalJSON implements encoding/json.Marshaler.
func (src CancelRequest) MarshalJSON() ([]byte, error) {
return json.Marshal(struct {
Type string
ProcessID uint32
SecretKey uint32
}{
Type: "CancelRequest",
ProcessID: src.ProcessID,
SecretKey: src.SecretKey,
})
}