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95 lines
2.1 KiB
95 lines
2.1 KiB
package pgproto3
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import (
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"bytes"
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"encoding/hex"
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"encoding/json"
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"errors"
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"github.com/jackc/pgio"
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)
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type SASLInitialResponse struct {
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AuthMechanism string
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Data []byte
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}
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// Frontend identifies this message as sendable by a PostgreSQL frontend.
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func (*SASLInitialResponse) Frontend() {}
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// Decode decodes src into dst. src must contain the complete message with the exception of the initial 1 byte message
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// type identifier and 4 byte message length.
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func (dst *SASLInitialResponse) Decode(src []byte) error {
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*dst = SASLInitialResponse{}
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rp := 0
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idx := bytes.IndexByte(src, 0)
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if idx < 0 {
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return errors.New("invalid SASLInitialResponse")
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}
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dst.AuthMechanism = string(src[rp:idx])
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rp = idx + 1
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rp += 4 // The rest of the message is data so we can just skip the size
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dst.Data = src[rp:]
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return nil
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}
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// Encode encodes src into dst. dst will include the 1 byte message type identifier and the 4 byte message length.
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func (src *SASLInitialResponse) Encode(dst []byte) []byte {
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dst = append(dst, 'p')
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sp := len(dst)
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dst = pgio.AppendInt32(dst, -1)
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dst = append(dst, []byte(src.AuthMechanism)...)
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dst = append(dst, 0)
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dst = pgio.AppendInt32(dst, int32(len(src.Data)))
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dst = append(dst, src.Data...)
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pgio.SetInt32(dst[sp:], int32(len(dst[sp:])))
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return dst
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}
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// MarshalJSON implements encoding/json.Marshaler.
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func (src SASLInitialResponse) MarshalJSON() ([]byte, error) {
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return json.Marshal(struct {
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Type string
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AuthMechanism string
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Data string
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}{
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Type: "SASLInitialResponse",
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AuthMechanism: src.AuthMechanism,
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Data: string(src.Data),
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})
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}
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// UnmarshalJSON implements encoding/json.Unmarshaler.
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func (dst *SASLInitialResponse) UnmarshalJSON(data []byte) error {
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// Ignore null, like in the main JSON package.
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if string(data) == "null" {
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return nil
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}
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var msg struct {
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AuthMechanism string
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Data string
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}
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if err := json.Unmarshal(data, &msg); err != nil {
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return err
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}
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dst.AuthMechanism = msg.AuthMechanism
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if msg.Data != "" {
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decoded, err := hex.DecodeString(msg.Data)
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if err != nil {
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return err
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}
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dst.Data = decoded
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}
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return nil
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}
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