63 lines
1.7 KiB
Go
63 lines
1.7 KiB
Go
/*
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* Copyright 2022 The Dragonfly Authors
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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 io
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import (
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"io"
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"github.com/hashicorp/go-multierror"
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)
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// multiReadCloser is MultiReadCloser instance.
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type multiReadCloser struct {
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reader io.Reader
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closers []io.Closer
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}
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// MultiReadCloser returns a ReadCloser that's the logical concatenation of
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// the provided input readClosers.
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func MultiReadCloser(readClosers ...io.ReadCloser) io.ReadCloser {
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readers := make([]io.Reader, len(readClosers))
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closers := make([]io.Closer, len(readClosers))
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for readCloser := range readClosers {
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closers[readCloser] = readClosers[readCloser]
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readers[readCloser] = readClosers[readCloser]
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}
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return &multiReadCloser{
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reader: io.MultiReader(readers...),
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closers: closers,
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}
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}
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// Reader is the interface that wraps the basic Read method for multiReadCloser.
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func (m *multiReadCloser) Read(p []byte) (int, error) {
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return m.reader.Read(p)
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}
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// Closer is the interface that wraps the basic Close method for multiReadCloser.
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func (m *multiReadCloser) Close() error {
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var merr error
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for i := range m.closers {
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if err := m.closers[i].Close(); err != nil {
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merr = multierror.Append(merr, err)
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}
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}
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return merr
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}
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