Add test data

go.mod

@@ -6,6 +6,7 @@ require (
 	github.com/goccy/go-json v0.10.2
 	github.com/gofiber/fiber/v2 v2.52.4
 	github.com/gofiber/template/jet/v2 v2.1.9
+	github.com/kettek/apng v0.0.0-20220823221153-ff692776a607
 	github.com/tidwall/gjson v1.17.1
 	golang.org/x/net v0.24.0
 )

go.sum

@@ -18,6 +18,8 @@ github.com/gofiber/utils v1.1.0 h1:vdEBpn7AzIUJRhe+CiTOJdUcTg4Q9RK+pEa0KPbLdrM=
 github.com/gofiber/utils v1.1.0/go.mod h1:poZpsnhBykfnY1Mc0KeEa6mSHrS3dV0+oBWyeQmb2e0=
 github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
 github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
+github.com/kettek/apng v0.0.0-20220823221153-ff692776a607 h1:8tP9cdXzcGX2AvweVVG/lxbI7BSjWbNNUustwJ9dQVA=
+github.com/kettek/apng v0.0.0-20220823221153-ff692776a607/go.mod h1:x78/VRQYKuCftMWS0uK5e+F5RJ7S4gSlESRWI0Prl6Q=
 github.com/klauspost/compress v1.17.8 h1:YcnTYrq7MikUT7k0Yb5eceMmALQPYBW/Xltxn0NAMnU=
 github.com/klauspost/compress v1.17.8/go.mod h1:Di0epgTjJY877eYKx5yC51cX2A2Vl2ibi7bDH9ttBbw=
 github.com/mattn/go-colorable v0.1.13 h1:fFA4WZxdEF4tXPZVKMLwD8oUnCTTo08duU7wxecdEvA=

proto_apng/main.go

@@ -0,0 +1,61 @@
+package main
+
+import (
+	"archive/zip"
+	"fmt"
+	"image"
+	"io"
+	"os"
+
+	"github.com/kettek/apng"
+)
+
+func main() {
+	filename := "119477424_ugoira600x600.zip"
+	f, err := os.Create("out.apng")
+	if err != nil {
+		panic(err)
+	}
+	err = zip2apng(filename, f, 1000, 1000)
+	if err != nil {
+		panic(err)
+	}
+}
+
+// APNG spec: https://wiki.mozilla.org/APNG_Specification
+
+// each frame will be delayed (delayNumerator/delayDenominator) seconds
+func zip2apng(filename string, w io.Writer, delayNumerator, delayDenominator uint16) error {
+	// Open a zip archive for reading.
+	r, err := zip.OpenReader(filename)
+	if err != nil {
+		return err
+	}
+	defer r.Close()
+
+	img_apng := apng.APNG{}
+
+	// Iterate through the files in the archive,
+	// printing some of their contents.
+	for _, f := range r.File {
+		fmt.Printf("Contents of %s:\n", f.Name)
+		rc, err := f.Open()
+		if err != nil {
+			return err
+		}
+		defer rc.Close()
+		img, img_format, err := image.Decode(rc)
+		_ = img_format
+		if err != nil {
+			return err
+		}
+		frame := apng.Frame{
+			Image:            img,
+			DelayNumerator:   delayNumerator,
+			DelayDenominator: delayDenominator,
+		}
+		img_apng.Frames = append(img_apng.Frames, frame)
+	}
+
+	return apng.Encode(w, img_apng)
+}

proto_apng/readme.md

@@ -0,0 +1,3 @@
+xarchiver won't open the file
+
+binwalk -e X.zip  does work