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63 lines
1.4 KiB
63 lines
1.4 KiB
package pgproto3
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import (
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"encoding/hex"
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"encoding/json"
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"github.com/jackc/pgio"
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)
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type CopyData struct {
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Data []byte
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}
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// Backend identifies this message as sendable by the PostgreSQL backend.
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func (*CopyData) Backend() {}
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// Frontend identifies this message as sendable by a PostgreSQL frontend.
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func (*CopyData) 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 *CopyData) Decode(src []byte) error {
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dst.Data = src
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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 *CopyData) Encode(dst []byte) []byte {
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dst = append(dst, 'd')
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dst = pgio.AppendInt32(dst, int32(4+len(src.Data)))
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dst = append(dst, src.Data...)
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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 CopyData) MarshalJSON() ([]byte, error) {
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return json.Marshal(struct {
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Type string
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Data string
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}{
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Type: "CopyData",
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Data: hex.EncodeToString(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 *CopyData) 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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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.Data = []byte(msg.Data)
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return nil
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}
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