golang删除文件中空行

“ ” = 32 空格
“\r” = 13 回车符
“\n” = 10 换行符
“\t” = 9 tab 键

删除文件中空行
func DeleteBlankFile(srcFilePah string, destFilePath string) error {
srcFile, err := os.OpenFile(srcFilePah, os.O_RDONLY, 0666)
defer srcFile.Close()
if err != nil {
return err
}
srcReader := bufio.NewReader(srcFile)
destFile, err := os.OpenFile(destFilePath, os.O_WRONLY|os.O_CREATE, 0666)
defer destFile.Close()
if err != nil {
return err
}
for {

    str, err := srcReader.ReadString('\n')
    if err != nil {
        if err == io.EOF {
            fmt.Print("The file end is touched.")
            break
        } else {
            return err
        }
    }

    if strings.HasSuffix(str," \r\n"){
        continue
    }
    if strings.HasPrefix(str,"\r\n"){
        continue
    }
    fmt.Println(len(str))
    fmt.Print(str)
    destFile.WriteString(str)
}
return nil

}