93 lines
1.6 KiB
Go
93 lines
1.6 KiB
Go
package main
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import (
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"crypto/md5"
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"encoding/hex"
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"fmt"
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"math/rand"
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"os"
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"path/filepath"
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)
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const DIR = "/var/data"
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func Exists(name string) (bool, error) {
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_, err := os.Stat(name)
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if os.IsNotExist(err) {
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return false, nil
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}
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return err != nil, err
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}
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func CreateDirectory(dirs string) error {
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if _, err := os.Stat(dirs); os.IsNotExist(err) {
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err := os.MkdirAll(dirs, 0664)
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if err != nil {
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return err
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}
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}
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return nil
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}
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func CreateFileOrOpenIfExist(name string) (*os.File, error) {
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err := CreateDirectory(filepath.Dir(name))
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if err != nil {
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return nil, err
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}
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exists, err := Exists(name)
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if err != nil {
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return nil, err
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}
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if exists {
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return os.OpenFile(name, os.O_WRONLY|os.O_CREATE, 0664)
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}
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return os.Create(name)
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}
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func CreateFileAndWriteData(filename string) error {
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file, err := CreateFileOrOpenIfExist(filename)
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if err != nil {
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return err
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}
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lines := rand.Intn(1000) + 100
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for i := 0; i < lines; i++ {
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randomValueForLine := rand.Intn(1_000_000)
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_, err = fmt.Fprintf(file, "%d\r\n", randomValueForLine)
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if err != nil {
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return err
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}
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}
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err = file.Close()
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if err != nil {
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return err
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}
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return nil
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}
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func GetMD5Hash(text string) string {
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hash := md5.Sum([]byte(text))
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return hex.EncodeToString(hash[:])
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}
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func main() {
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for i := 0; i < 10; i++ {
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filename := fmt.Sprintf("%s/%s.txt", DIR, GetMD5Hash(fmt.Sprintf("%d", i)))
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err := CreateFileAndWriteData(filename)
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if err != nil {
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fmt.Println(err)
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} else {
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fmt.Printf("Created file %s\n", filename)
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}
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}
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err := CreateFileAndWriteData(DIR + "/data.txt")
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if err != nil {
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fmt.Println(err)
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} else {
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fmt.Printf("Created file %s\n", DIR+"/data.txt")
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}
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}
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