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// Copyright © 2023 OpenIM. All rights reserved.
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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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package pkg
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import (
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"crypto/md5"
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"encoding/hex"
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"hash"
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"io"
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)
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func NewMd5Reader(r io.Reader) *Md5Reader {
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return &Md5Reader{h: md5.New(), r: r}
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}
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type Md5Reader struct {
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h hash.Hash
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r io.Reader
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}
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func (r *Md5Reader) Read(p []byte) (n int, err error) {
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n, err = r.r.Read(p)
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if err == nil && n > 0 {
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r.h.Write(p[:n])
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}
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return
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}
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func (r *Md5Reader) Md5() string {
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return hex.EncodeToString(r.h.Sum(nil))
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}
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