57 lines
1.1 KiB
Go
57 lines
1.1 KiB
Go
package utils
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import "os"
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// CreateEmptyFile 创建一个固定size大小的空文件
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// 如果seek文件失败，则删除文件，并返回错误信息
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func CreateEmptyFile(name string, size int64) (f *os.File, err error) {
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defer func() {
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if err != nil && f != nil {
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f.Close()
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os.Remove(name)
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}
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}()
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f, err = os.OpenFile(name, os.O_APPEND|os.O_CREATE|os.O_RDWR, 0666)
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if err != nil {
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return
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}
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if _, err = f.Seek(size-1, 0); err != nil {
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return
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}
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_, err = f.Write([]byte{0})
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return
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}
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func WriteFile(data []byte, filename string) (err error) {
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defer func() {
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if err != nil {
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os.Remove(filename)
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}
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}()
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pi := PathForInfo(filename)
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if pi.Dir != "" {
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if err = os.MkdirAll(pi.Dir, 0755); err != nil {
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return
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}
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}
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f, err := os.OpenFile(filename, os.O_APPEND|os.O_CREATE|os.O_RDWR, 0666)
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if err != nil {
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return
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}
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_, err = f.Write(data)
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f.Close()
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return
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}
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func PathExists(path string) (bool, error) {
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_, err := os.Stat(path)
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if err == nil {
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return true, nil
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}
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if os.IsNotExist(err) {
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return false, nil
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}
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return false, err
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}
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