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main
client/pkg/fileutil/filereader.go
60 строк
1 KB
Benjamin Wang
Add FileReader and FileBufReader utilities
16 июн 2022, 10:32
16 июн 2022, 10:32
d23917c
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// Copyright 2022 The etcd Authors // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // // http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS, // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License. package fileutil import ( "bufio" "io" "io/fs" "os" ) // FileReader is a wrapper of io.Reader. It also provides file info. type FileReader interface { io.Reader FileInfo() (fs.FileInfo, error) } type fileReader struct { *os.File } func NewFileReader(f *os.File) FileReader { return &fileReader{f} } func (fr *fileReader) FileInfo() (fs.FileInfo, error) { return fr.Stat() } // FileBufReader is a wrapper of bufio.Reader. It also provides file info. type FileBufReader struct { *bufio.Reader fi fs.FileInfo } func NewFileBufReader(fr FileReader) *FileBufReader { bufReader := bufio.NewReader(fr) fi, err := fr.FileInfo() if err != nil { // This should never happen. panic(err) } return &FileBufReader{bufReader, fi} } func (fbr *FileBufReader) FileInfo() fs.FileInfo { return fbr.fi }