feat: caching headers

internal/components/images/uid.go

@@ -0,0 +1,47 @@
+package images
+
+import (
+	"bytes"
+	"compress/flate"
+	"encoding/base64"
+	"io"
+)
+
+func UIDFromPath(path string) (uid string, err error) {
+	var b bytes.Buffer
+	// NewWriter with NoDict (nil) creates a raw DEFLATE compressor
+	zw, _ := flate.NewWriter(&b, flate.BestCompression)
+
+	_, err = zw.Write([]byte(path))
+	if err != nil {
+		return
+	}
+	err = zw.Close() // Essential to flush the final bits
+	if err != nil {
+		return
+	}
+
+	return base64.RawURLEncoding.EncodeToString(b.Bytes()), nil
+}
+
+func PathFromUID(uid string) (string, error) {
+	// 1. Decode the Base64 string back to compressed bytes
+	compressedBytes, err := base64.RawURLEncoding.DecodeString(uid)
+	if err != nil {
+		return "", err
+	}
+
+	// 2. Create a flate reader (NoDict/nil since you used nil in the writer)
+	// flate.NewReader returns an io.ReadCloser
+	reader := flate.NewReader(bytes.NewReader(compressedBytes))
+	defer reader.Close()
+
+	// 3. Read the decompressed data into a buffer
+	var out bytes.Buffer
+	_, err = io.Copy(&out, reader)
+	if err != nil {
+		return "", err
+	}
+
+	return out.String(), nil
+}