50 lines
1.1 KiB
Go
50 lines
1.1 KiB
Go
package cache
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import (
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"fmt"
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"io/ioutil"
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"net/http"
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"os"
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"path/filepath"
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)
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var cacheDir = "./cache"
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func GetCachedFile(url string) (string, error) {
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if err := os.MkdirAll(cacheDir, os.ModePerm); err != nil {
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return "", err
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}
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fileName := filepath.Join(cacheDir, filepath.Base(url))
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if _, err := os.Stat(fileName); err == nil {
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return fileName, nil
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}
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return "", nil
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}
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func SaveToCache(url string, data []byte) (string, error) {
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if err := os.MkdirAll(cacheDir, os.ModePerm); err != nil {
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return "", err
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}
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fileName := filepath.Join(cacheDir, filepath.Base(url))
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if err := ioutil.WriteFile(fileName, data, 0644); err != nil {
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return "", err
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}
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fmt.Printf("Сохранено в кэш: %s\n", fileName)
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return fileName, nil
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}
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func DownloadWithCache(url string) (string, error) {
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if cached, err := GetCachedFile(url); err == nil && cached != "" {
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return cached, nil
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}
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resp, err := http.Get(url)
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if err != nil {
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return "", err
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}
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defer resp.Body.Close()
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data, err := ioutil.ReadAll(resp.Body)
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if err != nil {
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return "", err
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}
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return SaveToCache(url, data)
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} |