mirror of
https://github.com/matrix-org/dendrite.git
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45 lines
1.5 KiB
Go
45 lines
1.5 KiB
Go
/* Copyright 2017 New Vector Ltd
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package gomatrixserverlib
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import (
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"encoding/hex"
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"encoding/json"
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)
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// A HexString is a string of bytes that are hex encoded when used in JSON.
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// The bytes encoded using hex when marshalled as JSON.
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// When the bytes are unmarshalled from JSON they are decoded from hex.
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type HexString []byte
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// MarshalJSON encodes the bytes as hex and then encodes the hex as a JSON string.
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// This takes a value receiver so that maps and slices of HexString encode correctly.
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func (h HexString) MarshalJSON() ([]byte, error) {
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return json.Marshal(hex.EncodeToString(h))
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}
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// UnmarshalJSON decodes a JSON string and then decodes the resulting hex.
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// This takes a pointer receiver because it needs to write the result of decoding.
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func (h *HexString) UnmarshalJSON(raw []byte) (err error) {
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var str string
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if err = json.Unmarshal(raw, &str); err != nil {
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return
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}
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*h, err = hex.DecodeString(str)
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return
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}
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