75 lines
1.2 KiB
Go
75 lines
1.2 KiB
Go
package rendering
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import (
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"crypto/sha1"
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"encoding/hex"
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"io"
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"net/http"
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"net/url"
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"os"
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"path/filepath"
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)
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type Website struct {
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Url string
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Name string
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ImageUrl string
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IsFetched bool
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}
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const CacheUrl = "cache"
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func GetCacheDir() (string, error) {
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baseDir, err := os.UserCacheDir()
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if err != nil {
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return "", err
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}
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cacheDir := filepath.Join(baseDir, "startpage")
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err = os.MkdirAll(cacheDir, 0o755)
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if err != nil {
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return "", err
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}
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return cacheDir, nil
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}
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func hashUrl(url string) string {
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h := sha1.New()
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io.WriteString(h, url)
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return hex.EncodeToString(h.Sum(nil))
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}
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func (w *Website) Cache() error {
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if w.IsFetched {
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return nil
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}
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cacheDir, err := GetCacheDir()
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if err != nil {
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return err
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}
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filename := hashUrl(w.ImageUrl) + filepath.Ext(w.ImageUrl)
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targetPath := filepath.Join(cacheDir, filename)
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resp, err := http.Get(w.ImageUrl)
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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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file, err := os.Create(targetPath)
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if err != nil {
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return err
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}
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defer file.Close()
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_, err = io.Copy(file, resp.Body)
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if err != nil {
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return err
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}
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w.ImageUrl, _ = url.JoinPath(CacheUrl, filename)
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w.IsFetched = true
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return nil
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}
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