Jack Christensen
4e2900b774
pgproto3 will wrap the message encoding and decoding for the PostgreSQL frontend/backend protocol version 3.
89 lines
2.0 KiB
Go
89 lines
2.0 KiB
Go
package pgproto3
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import "fmt"
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type Message interface {
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UnmarshalBinary(data []byte) error
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MarshalBinary() (data []byte, err error)
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}
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type FrontendMessage interface {
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Message
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Frontend() // no-op method to distinguish frontend from backend methods
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}
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type BackendMessage interface {
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Message
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Backend() // no-op method to distinguish frontend from backend methods
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}
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// func ParseBackend(typeByte byte, body []byte) (BackendMessage, error) {
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// switch typeByte {
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// case '1':
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// return ParseParseComplete(body)
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// case '2':
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// return ParseBindComplete(body)
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// case 'C':
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// return ParseCommandComplete(body)
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// case 'D':
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// return ParseDataRow(body)
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// case 'E':
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// return ParseErrorResponse(body)
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// case 'K':
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// return ParseBackendKeyData(body)
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// case 'R':
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// return ParseAuthentication(body)
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// case 'S':
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// return ParseParameterStatus(body)
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// case 'T':
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// return ParseRowDescription(body)
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// case 't':
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// return ParseParameterDescription(body)
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// case 'Z':
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// return ParseReadyForQuery(body)
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// default:
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// return ParseUnknownMessage(typeByte, body)
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// }
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// }
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// func ParseFrontend(typeByte byte, body []byte) (FrontendMessage, error) {
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// switch typeByte {
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// case 'B':
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// return ParseBind(body)
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// case 'D':
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// return ParseDescribe(body)
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// case 'E':
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// return ParseExecute(body)
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// case 'P':
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// return ParseParse(body)
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// case 'p':
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// return ParsePasswordMessage(body)
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// case 'Q':
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// return ParseQuery(body)
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// case 'S':
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// return ParseSync(body)
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// case 'X':
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// return ParseTerminate(body)
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// default:
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// return ParseUnknownMessage(typeByte, body)
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// }
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// }
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type invalidMessageLenErr struct {
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messageType string
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expectedLen int
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actualLen int
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}
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func (e *invalidMessageLenErr) Error() string {
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return fmt.Sprintf("%s body must have length of %d, but it is %d", e.messageType, e.expectedLen, e.actualLen)
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}
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type invalidMessageFormatErr struct {
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messageType string
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}
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func (e *invalidMessageFormatErr) Error() string {
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return fmt.Sprintf("%s body is invalid", e.messageType)
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}
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