102 lines
2.3 KiB
Go
102 lines
2.3 KiB
Go
|
package pgproto3
|
||
|
|
|
||
|
|
import (
|
||
|
|
"encoding/binary"
|
||
|
|
"encoding/hex"
|
||
|
|
"encoding/json"
|
||
|
|
|
||
|
|
"github.com/jackc/pgio"
|
||
|
|
)
|
||
|
|
|
||
|
|
type FunctionCallResponse struct {
|
||
|
|
Result []byte
|
||
|
|
}
|
||
|
|
|
||
|
|
// Backend identifies this message as sendable by the PostgreSQL backend.
|
||
|
|
func (*FunctionCallResponse) Backend() {}
|
||
|
|
|
||
|
|
// Decode decodes src into dst. src must contain the complete message with the exception of the initial 1 byte message
|
||
|
|
// type identifier and 4 byte message length.
|
||
|
|
func (dst *FunctionCallResponse) Decode(src []byte) error {
|
||
|
|
if len(src) < 4 {
|
||
|
|
return &invalidMessageFormatErr{messageType: "FunctionCallResponse"}
|
||
|
|
}
|
||
|
|
rp := 0
|
||
|
|
resultSize := int(binary.BigEndian.Uint32(src[rp:]))
|
||
|
|
rp += 4
|
||
|
|
|
||
|
|
if resultSize == -1 {
|
||
|
|
dst.Result = nil
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
|
||
|
|
if len(src[rp:]) != resultSize {
|
||
|
|
return &invalidMessageFormatErr{messageType: "FunctionCallResponse"}
|
||
|
|
}
|
||
|
|
|
||
|
|
dst.Result = src[rp:]
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
|
||
|
|
// Encode encodes src into dst. dst will include the 1 byte message type identifier and the 4 byte message length.
|
||
|
|
func (src *FunctionCallResponse) Encode(dst []byte) []byte {
|
||
|
|
dst = append(dst, 'V')
|
||
|
|
sp := len(dst)
|
||
|
|
dst = pgio.AppendInt32(dst, -1)
|
||
|
|
|
||
|
|
if src.Result == nil {
|
||
|
|
dst = pgio.AppendInt32(dst, -1)
|
||
|
|
} else {
|
||
|
|
dst = pgio.AppendInt32(dst, int32(len(src.Result)))
|
||
|
|
dst = append(dst, src.Result...)
|
||
|
|
}
|
||
|
|
|
||
|
|
pgio.SetInt32(dst[sp:], int32(len(dst[sp:])))
|
||
|
|
|
||
|
|
return dst
|
||
|
|
}
|
||
|
|
|
||
|
|
// MarshalJSON implements encoding/json.Marshaler.
|
||
|
|
func (src FunctionCallResponse) MarshalJSON() ([]byte, error) {
|
||
|
|
var formattedValue map[string]string
|
||
|
|
var hasNonPrintable bool
|
||
|
|
for _, b := range src.Result {
|
||
|
|
if b < 32 {
|
||
|
|
hasNonPrintable = true
|
||
|
|
break
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if hasNonPrintable {
|
||
|
|
formattedValue = map[string]string{"binary": hex.EncodeToString(src.Result)}
|
||
|
|
} else {
|
||
|
|
formattedValue = map[string]string{"text": string(src.Result)}
|
||
|
|
}
|
||
|
|
|
||
|
|
return json.Marshal(struct {
|
||
|
|
Type string
|
||
|
|
Result map[string]string
|
||
|
|
}{
|
||
|
|
Type: "FunctionCallResponse",
|
||
|
|
Result: formattedValue,
|
||
|
|
})
|
||
|
|
}
|
||
|
|
|
||
|
|
// UnmarshalJSON implements encoding/json.Unmarshaler.
|
||
|
|
func (dst *FunctionCallResponse) UnmarshalJSON(data []byte) error {
|
||
|
|
// Ignore null, like in the main JSON package.
|
||
|
|
if string(data) == "null" {
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
|
||
|
|
var msg struct {
|
||
|
|
Result map[string]string
|
||
|
|
}
|
||
|
|
err := json.Unmarshal(data, &msg)
|
||
|
|
if err != nil {
|
||
|
|
return err
|
||
|
|
}
|
||
|
|
dst.Result, err = getValueFromJSON(msg.Result)
|
||
|
|
return err
|
||
|
|
}
|