feat: proxy download image

2024-04-15 18:02:54 +08:00
parent c5d0b8e45b
commit 410a4c0d8d
57 changed files with 10913 additions and 316 deletions
--- a/x/t1/main.go
+++ b/x/t1/main.go
@ -0,0 +1,127 @@
+// https://iximiuz.com/en/posts/working-with-container-images-in-go/
+// package main
+//
+// import (
+//
+//	"context"
+//	"nf-repo/internal/util/tools"
+//	"os"
+//
+//	"github.com/containers/image/copy"
+//	"github.com/containers/image/signature"
+//	"github.com/containers/image/storage"
+//	"github.com/containers/image/transports/alltransports"
+//	"github.com/containers/image/types"
+//
+// )
+//
+//	func main() {
+//		imageName := "docker://alpine:latest"
+//		srcRef, _ := alltransports.ParseImageName(imageName)
+//
+//		// Carries various default locations.
+//		systemCtx := &types.SystemContext{}
+//		policy, _ := signature.DefaultPolicy(systemCtx)
+//		policyCtx, _ := signature.NewPolicyContext(policy)
+//
+//		dstName := imageName
+//		if srcRef.DockerReference() != nil {
+//			dstName = srcRef.DockerReference().String()
+//		}
+//		store := createStore() // see previous section
+//		dstRef, _ := storage.Transport.ParseStoreReference(store, dstName)
+//
+//		copyOptions := &copy.Options{ReportWriter: os.Stdout}
+//		manifest, _ := copy.Image(
+//			context.Background(),
+//			policyCtx,
+//			dstRef,
+//			srcRef,
+//			copyOptions,
+//		)
+//		println(string(manifest))
+//	}
+
+package main
+
+import (
+	"encoding/json"
+	"github.com/containers/image/v5/pkg/blobinfocache"
+	"github.com/containers/image/v5/transports/alltransports"
+	"github.com/containers/image/v5/types"
+	digest "github.com/opencontainers/go-digest"
+	"log"
+	"nf-repo/internal/util/tools"
+	"runtime"
+)
+
+type M struct {
+	Manifests []struct {
+		Digest    string `json:"digest"`
+		MediaType string `json:"mediaType"`
+		Platform  struct {
+			Architecture string `json:"architecture"`
+			Os           string `json:"os"`
+			Variant      string `json:"variant,omitempty"`
+		} `json:"platform"`
+		Size int `json:"size"`
+	} `json:"manifests"`
+	MediaType     string `json:"mediaType"`
+	SchemaVersion int    `json:"schemaVersion"`
+}
+
+func main() {
+	imageName := "docker://alpine:latest"
+	srcRef, _ := alltransports.ParseImageName(imageName)
+
+	// Carries various default locations.
+	systemCtx := &types.SystemContext{
+		DockerInsecureSkipTLSVerify: types.OptionalBoolTrue,
+		DockerDisableV1Ping:         true,
+	}
+
+	log.Printf("[NewImageSource] start!!!")
+	imgSrc, err := srcRef.NewImageSource(tools.Timeout(60), systemCtx)
+	if err != nil {
+		log.Panic(1, err)
+	}
+
+	log.Printf("[GetManifest] start!!!")
+	bs, str, err := imgSrc.GetManifest(tools.Timeout(5), nil)
+	if err != nil {
+		log.Panic(2, err)
+	}
+
+	log.Printf("[manifest] bs=%s str=%s", string(bs), str)
+
+	var (
+		m = new(M)
+		d string
+	)
+	if err = json.Unmarshal(bs, m); err != nil {
+		log.Panic(3, err)
+	}
+
+	for _, item := range m.Manifests {
+		if item.Platform.Os == "linux" && item.Platform.Architecture == runtime.GOARCH {
+			d = item.Digest
+			break
+		}
+	}
+
+	if d == "" {
+		log.Panicf("[4] empty digest: %s - %s", runtime.GOOS, runtime.GOARCH)
+	}
+
+	rc, size, err := imgSrc.GetBlob(tools.Timeout(60),
+		types.BlobInfo{
+			Digest: digest.Digest(d),
+		}, blobinfocache.DefaultCache(systemCtx))
+	if err != nil {
+		log.Panic(5, err)
+	}
+
+	log.Printf("[GetBlob] size=%d", size)
+
+	rc.Close()
+}