chore(updater): move updater packages to pkg/updaters/<name>

pkg/updaters/unzip/fetch.go

@@ -0,0 +1,40 @@
+package unzip
+
+import (
+	"context"
+	"fmt"
+	"io"
+	"net/http"
+)
+
+func (u *Unzipper) FetchAndExtract(ctx context.Context, url string) (
+	contents map[string][]byte, err error,
+) {
+	request, err := http.NewRequestWithContext(ctx, http.MethodGet, url, nil)
+	if err != nil {
+		return nil, err
+	}
+	request.Header.Set("User-Agent", "gluetun")
+
+	response, err := u.client.Do(request)
+	if err != nil {
+		return nil, err
+	}
+	defer response.Body.Close()
+
+	if response.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("HTTP status code not OK: %s: %d %s",
+			url, response.StatusCode, response.Status)
+	}
+
+	b, err := io.ReadAll(response.Body)
+	if err != nil {
+		return nil, err
+	}
+
+	if err := response.Body.Close(); err != nil {
+		return nil, err
+	}
+
+	return zipExtractAll(b)
+}