93 lines
2.7 KiB
Go
93 lines
2.7 KiB
Go
|
// Copyright (c) 2012 - Cloud Instruments Co., Ltd.
|
||
|
|
//
|
||
|
|
// All rights reserved.
|
||
|
|
//
|
||
|
|
// Redistribution and use in source and binary forms, with or without
|
||
|
|
// modification, are permitted provided that the following conditions are met:
|
||
|
|
//
|
||
|
|
// 1. Redistributions of source code must retain the above copyright notice, this
|
||
|
|
// list of conditions and the following disclaimer.
|
||
|
|
// 2. Redistributions in binary form must reproduce the above copyright notice,
|
||
|
|
// this list of conditions and the following disclaimer in the documentation
|
||
|
|
// and/or other materials provided with the distribution.
|
||
|
|
//
|
||
|
|
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
|
||
|
|
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
||
|
|
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
||
|
|
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
|
||
|
|
// ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
|
||
|
|
// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
||
|
|
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
|
||
|
|
// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||
|
|
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
||
|
|
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||
|
|
|
||
|
|
package seelog
|
||
|
|
|
||
|
|
import (
|
||
|
|
"fmt"
|
||
|
|
"io"
|
||
|
|
"os"
|
||
|
|
"path/filepath"
|
||
|
|
)
|
||
|
|
|
||
|
|
// fileWriter is used to write to a file.
|
||
|
|
type fileWriter struct {
|
||
|
|
innerWriter io.WriteCloser
|
||
|
|
fileName string
|
||
|
|
}
|
||
|
|
|
||
|
|
// Creates a new file and a corresponding writer. Returns error, if the file couldn't be created.
|
||
|
|
func NewFileWriter(fileName string) (writer *fileWriter, err error) {
|
||
|
|
newWriter := new(fileWriter)
|
||
|
|
newWriter.fileName = fileName
|
||
|
|
|
||
|
|
return newWriter, nil
|
||
|
|
}
|
||
|
|
|
||
|
|
func (fw *fileWriter) Close() error {
|
||
|
|
if fw.innerWriter != nil {
|
||
|
|
err := fw.innerWriter.Close()
|
||
|
|
if err != nil {
|
||
|
|
return err
|
||
|
|
}
|
||
|
|
fw.innerWriter = nil
|
||
|
|
}
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
|
||
|
|
// Create folder and file on WriteLog/Write first call
|
||
|
|
func (fw *fileWriter) Write(bytes []byte) (n int, err error) {
|
||
|
|
if fw.innerWriter == nil {
|
||
|
|
if err := fw.createFile(); err != nil {
|
||
|
|
return 0, err
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return fw.innerWriter.Write(bytes)
|
||
|
|
}
|
||
|
|
|
||
|
|
func (fw *fileWriter) createFile() error {
|
||
|
|
folder, _ := filepath.Split(fw.fileName)
|
||
|
|
var err error
|
||
|
|
|
||
|
|
if 0 != len(folder) {
|
||
|
|
err = os.MkdirAll(folder, defaultDirectoryPermissions)
|
||
|
|
if err != nil {
|
||
|
|
return err
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// If exists
|
||
|
|
fw.innerWriter, err = os.OpenFile(fw.fileName, os.O_WRONLY|os.O_APPEND|os.O_CREATE, defaultFilePermissions)
|
||
|
|
|
||
|
|
if err != nil {
|
||
|
|
return err
|
||
|
|
}
|
||
|
|
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
|
||
|
|
func (fw *fileWriter) String() string {
|
||
|
|
return fmt.Sprintf("File writer: %s", fw.fileName)
|
||
|
|
}
|