feat: proxy download image

x/t2/main.go

@@ -0,0 +1,61 @@
+package main
+
+import (
+	"context"
+	"github.com/google/go-containerregistry/pkg/name"
+	"github.com/google/go-containerregistry/pkg/v1/remote"
+	"io"
+	"log"
+	"os/signal"
+	"syscall"
+)
+
+func main() {
+	ctx, cancel := signal.NotifyContext(context.Background(), syscall.SIGHUP, syscall.SIGINT, syscall.SIGTERM, syscall.SIGQUIT)
+	defer cancel()
+
+	puller, err := remote.NewPuller()
+	if err != nil {
+		log.Panic(1, err)
+	}
+
+	//imageName := "loveuer/hello:v2.0.1"
+	imageName := "alpine:latest"
+	tn, err := name.NewTag(imageName)
+	if err != nil {
+		log.Panic(2, err)
+	}
+
+	des, err := puller.Get(ctx, tn)
+	if err != nil {
+		log.Panic(3, err)
+	}
+
+	img, err := des.Image()
+	if err != nil {
+		log.Panic(4, err)
+	}
+
+	lys, err := img.Layers()
+	if err != nil {
+		log.Panic(5, err)
+	}
+
+	rs := make([]io.Reader, 0)
+	for _, item := range lys {
+		r, err := item.Uncompressed()
+		if err != nil {
+			log.Panic(6, err)
+		}
+
+		rs = append(rs, r)
+	}
+
+	allr := io.MultiReader(rs...)
+	bs, err := io.ReadAll(allr)
+	if err != nil {
+		log.Panic(7, err)
+	}
+
+	log.Printf("size: %.2f MB", float64(len(bs))/1024/1024)
+}