fix: show original image if can't thumbnail

See https://git.vvvvvvaria.org/decentral1se/distribusi-go/issues/5

distribusi.go

@@ -453,14 +453,8 @@ func getMtype(fpath string) (string, error) {
 // genThumb generates an in-memory image thumbnail and encodes it into a base64
 // representation  which is suitable for embedding in HTML pages.
 func genThumb(c *cli.Context, fpath, caption string) (string, error) {
-	knownFailureExts := []string{".ico", ".svg", ".xcf"}
-	if sliceContains(knownFailureExts, filepath.Ext(fpath)) {
-		return "", fmt.Errorf("unable to generate thumbnail for %s", fpath)
-	}
-
 	imgSrc, err := imaging.Open(fpath, imaging.AutoOrientation(true))
 	if err != nil {
-		logrus.Debugf("failed to generate thumbnail for %s", fpath)
 		return "", err
 	}
 
@@ -577,8 +571,8 @@ func getHref(c *cli.Context, fpath string, mtype string) (bool, string, error) {
 		} else {
 			thumb, err := genThumb(c, fpath, caption)
 			if err != nil {
-				unknown = true
-				href = fmt.Sprintf("<a class='%s' href=\"%s\">%s</a>", stype, fname, fname)
+				logrus.Debugf("failed to generate thumbnail for %s, showing original image", fpath)
+				href = fmt.Sprintf("<img class='%s' src=\"%s\" />", stype, fname)
 			} else {
 				href = fmt.Sprintf(
 					"<figure><a href=\"%s\"><img class='thumbnail' loading='lazy' src='data:image/jpg;base64,%s'></a><figcaption>%s</figcaption></figure>",