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50 lines
1.1 KiB
50 lines
1.1 KiB
package pgproto3 |
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import ( |
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"bytes" |
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"encoding/json" |
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"github.com/jackc/pgio" |
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) |
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type Query struct { |
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String string |
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} |
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// Frontend identifies this message as sendable by a PostgreSQL frontend. |
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func (*Query) 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 *Query) Decode(src []byte) error { |
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i := bytes.IndexByte(src, 0) |
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if i != len(src)-1 { |
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return &invalidMessageFormatErr{messageType: "Query"} |
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} |
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dst.String = string(src[:i]) |
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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 *Query) Encode(dst []byte) []byte { |
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dst = append(dst, 'Q') |
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dst = pgio.AppendInt32(dst, int32(4+len(src.String)+1)) |
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dst = append(dst, src.String...) |
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dst = append(dst, 0) |
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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 Query) MarshalJSON() ([]byte, error) { |
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return json.Marshal(struct { |
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Type string |
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String string |
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}{ |
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Type: "Query", |
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String: src.String, |
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}) |
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}
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