Support V2 Manifest Lists

main.go

@@ -243,6 +243,22 @@ func (a *apiClient) viewTagInfo(c echo.Context) error {
 		layersCount = len(gjson.Get(infoV1, "fsLayers").Array())
 	}
 
+	isDigest := strings.HasPrefix(tag, "sha256:")
+	var digests []map[string]gjson.Result
+	var digestSizes []int64
+	for _, s := range a.client.Manifests(repoPath, tag) {
+		var r map[string]gjson.Result = s.Map()
+		r["architecture"] = s.Get("platform.architecture")
+		r["os"] = s.Get("platform.os")
+		_, _, dInfo := a.client.TagInfo(repoPath, s.Get("digest").String(), false)
+		var dSize int64
+		for _, d := range gjson.Get(dInfo, "layers.#.size").Array() {
+			dSize = dSize + d.Int()
+		}
+		digestSizes = append(digestSizes, dSize)
+		digests = append(digests, r)
+	}
+
 	data := jet.VarMap{}
 	data.Set("namespace", namespace)
 	data.Set("repo", repo)
@@ -254,6 +270,9 @@ func (a *apiClient) viewTagInfo(c echo.Context) error {
 	data.Set("layersCount", layersCount)
 	data.Set("layersV2", layersV2)
 	data.Set("layersV1", layersV1)
+	data.Set("isDigest", isDigest)
+	data.Set("digests", digests)
+	data.Set("digestSizes", digestSizes)
 
 	return c.Render(http.StatusOK, "tag_info.html", data)
 }

registry/client.go

@@ -106,8 +106,12 @@ func (c *Client) getToken(scope string) string {
 }
 
 // callRegistry make an HTTP request to Docker registry.
-func (c *Client) callRegistry(uri, scope string, manifest uint, delete bool) (string, gorequest.Response) {
+func (c *Client) callRegistry(uri, scope string, manifest uint, delete bool, list bool) (string, gorequest.Response) {
-	acceptHeader := fmt.Sprintf("application/vnd.docker.distribution.manifest.v%d+json", manifest)
+	endpoint := "manifest"
+	if list {
+		endpoint = "manifest.list"
+	}
+	acceptHeader := fmt.Sprintf("application/vnd.docker.distribution.%s.v%d+json", endpoint, manifest)
 	authHeader := ""
 	if c.authURL != "" {
 		authHeader = fmt.Sprintf("Bearer %s", c.getToken(scope))
@@ -179,7 +183,7 @@ func (c *Client) Repositories(useCache bool) map[string][]string {
 	uri := "/v2/_catalog"
 	c.repos = map[string][]string{}
 	for {
-		data, resp := c.callRegistry(uri, scope, 2, false)
+		data, resp := c.callRegistry(uri, scope, 2, false, false)
 		if data == "" {
 			return c.repos
 		}
@@ -212,7 +216,7 @@ func (c *Client) Repositories(useCache bool) map[string][]string {
 // Tags get tags for the repo.
 func (c *Client) Tags(repo string) []string {
 	scope := fmt.Sprintf("repository:%s:*", repo)
-	data, _ := c.callRegistry(fmt.Sprintf("/v2/%s/tags/list", repo), scope, 2, false)
+	data, _ := c.callRegistry(fmt.Sprintf("/v2/%s/tags/list", repo), scope, 2, false, false)
 	var tags []string
 	for _, t := range gjson.Get(data, "tags").Array() {
 		tags = append(tags, t.String())
@@ -220,10 +224,17 @@ func (c *Client) Tags(repo string) []string {
 	return tags
 }
 
+// Manifests gets manifest list entries for a tag for the repo.
+func (c *Client) Manifests(repo string, tag string) []gjson.Result {
+	scope := fmt.Sprintf("repository:%s:*", repo)
+	data, _ := c.callRegistry(fmt.Sprintf("/v2/%s/manifests/%s", repo, tag), scope, 2, false, true)
+	return gjson.Get(data, "manifests").Array()
+}
+
 // TagInfo get image info for the repo tag.
 func (c *Client) TagInfo(repo, tag string, v1only bool) (rsha256, rinfoV1, rinfoV2 string) {
 	scope := fmt.Sprintf("repository:%s:*", repo)
-	infoV1, _ := c.callRegistry(fmt.Sprintf("/v2/%s/manifests/%s", repo, tag), scope, 1, false)
+	infoV1, _ := c.callRegistry(fmt.Sprintf("/v2/%s/manifests/%s", repo, tag), scope, 1, false, false)
 	if infoV1 == "" {
 		return "", "", ""
 	}
@@ -232,7 +243,7 @@ func (c *Client) TagInfo(repo, tag string, v1only bool) (rsha256, rinfoV1, rinfo
 		return "", infoV1, ""
 	}
 
-	infoV2, resp := c.callRegistry(fmt.Sprintf("/v2/%s/manifests/%s", repo, tag), scope, 2, false)
+	infoV2, resp := c.callRegistry(fmt.Sprintf("/v2/%s/manifests/%s", repo, tag), scope, 2, false, false)
 	digest := resp.Header.Get("Docker-Content-Digest")
 	if infoV2 == "" || digest == "" {
 		return "", "", ""
@@ -269,5 +280,5 @@ func (c *Client) CountTags(interval uint8) {
 // DeleteTag delete image tag.
 func (c *Client) DeleteTag(repo, tag string) {
 	scope := fmt.Sprintf("repository:%s:*", repo)
-	c.callRegistry(fmt.Sprintf("/v2/%s/manifests/%s", repo, tag), scope, 2, true)
+	c.callRegistry(fmt.Sprintf("/v2/%s/manifests/%s", repo, tag), scope, 2, true, false)
 }

templates/tag_info.html

@@ -17,15 +17,19 @@
             <th colspan="2">Image Details</th>
         </tr>
     </thead>
+    {{if not isDigest}}
     <tr>
         <td width="20%">Image</td><td>{{ registryHost }}/{{ repoPath }}:{{ tag }}</td>
     </tr>
+    {{end}}
     <tr>
         <td>sha256</td><td>{{ sha256 }}</td>
     </tr>
+    {{if not isDigest}}
     <tr>
         <td>Created On</td><td>{{ created|pretty_time }}</td>
     </tr>
+    {{end}}
     <tr>
         <td>Image Size</td><td>{{ imageSize|pretty_size }}</td>
     </tr>
@@ -34,6 +38,29 @@
     </tr>
 </table>
 
+{{if len(digests) != 0}}
+<h4>Manifest List v2</h4>
+<table class="table table-striped table-bordered">
+    <thead bgcolor="#ddd">
+        <tr>
+            <th>Manifest #</th>
+            <th>Digest</th>
+            <th>Size</th>
+            <th>Architecture</th>
+            <th>OS</th>
+        </tr>
+    </thead>
+{{range index, manifest := digests}}
+    <tr>
+        <td>{{ index+1 }}</td>
+        <td><a href='{{ basePath }}/{{ namespace }}/{{ repo }}/{{ manifest["digest"] }}'>{{ manifest["digest"] }}</a></td>
+        <td>{{ digestSizes[index]|pretty_size }}</td>
+        <td>{{ manifest["architecture"] }}</td>
+        <td>{{ manifest["os"] }}</td>
+    </tr>
+{{end}}
+</table>
+{{else}}
 {{if layersV2}}
 <h4>Manifest v2</h4>
 <table class="table table-striped table-bordered">
@@ -53,7 +80,9 @@
 {{end}}
 </table>
 {{end}}
+{{end}}
 
+{{if not isDigest}}
 <h4>Manifest v1</h4>
 {{range index, layer := layersV1}}
 <table class="table table-striped table-bordered">
@@ -81,5 +110,6 @@
     {{end}}
 </table>
 {{end}}
+{{end}}
 
 {{end}}