fix image match and fix docker save

Signed-off-by: Xian Chaobo <xianchaobo@huawei.com>

api/handlers.go

@@ -62,6 +62,20 @@ func getVersion(c *context, w http.ResponseWriter, r *http.Request) {
 	json.NewEncoder(w).Encode(version)
 }
 
+// GET /images/{name:.*}/get
+func getImage(c *context, w http.ResponseWriter, r *http.Request) {
+	name := mux.Vars(r)["name"]
+
+	for _, image := range c.cluster.Images() {
+		if len(strings.SplitN(name, ":", 2)) == 2 && image.Match(name) ||
+			len(strings.SplitN(name, ":", 2)) == 1 && image.MatchWithoutTag(name) {
+			proxy(c.tlsConfig, image.Engine.Addr, w, r)
+			return
+		}
+	}
+	httpError(w, fmt.Sprintf("No such image: %s", name), http.StatusNotFound)
+}
+
 // GET /images/get
 func getImages(c *context, w http.ResponseWriter, r *http.Request) {
 	if err := r.ParseForm(); err != nil {
@@ -83,7 +97,8 @@ func getImages(c *context, w http.ResponseWriter, r *http.Request) {
 		// Count how many images we need it has.
 		for _, name := range names {
 			for _, image := range images {
-				if image.Match(name) {
+				if len(strings.SplitN(name, ":", 2)) == 2 && image.Match(name) ||
+					len(strings.SplitN(name, ":", 2)) == 1 && image.MatchWithoutTag(name) {
 					matchedImages = matchedImages + 1
 					break
 				}

api/router.go

@@ -29,7 +29,7 @@ var routes = map[string]map[string]handler{
 		"/images/viz":                     notImplementedHandler,
 		"/images/search":                  proxyRandom,
 		"/images/get":                     getImages,
-		"/images/{name:.*}/get":           proxyImage,
+		"/images/{name:.*}/get":           getImage,
 		"/images/{name:.*}/history":       proxyImage,
 		"/images/{name:.*}/json":          proxyImage,
 		"/containers/ps":                  getContainersJSON,

cluster/image.go

@@ -20,13 +20,34 @@ func (image *Image) Match(IDOrName string) bool {
 	if image.Id == IDOrName || (size > 2 && strings.HasPrefix(image.Id, IDOrName)) {
 		return true
 	}
+
+	if len(strings.SplitN(IDOrName, ":", 2)) == 1 {
+		IDOrName = IDOrName + ":latest"
+	}
+
 	for _, repoTag := range image.RepoTags {
-		if len(strings.SplitN(repoTag, ":", 2)) == 1 {
-			repoTag = repoTag + ":latest"
-		}
 		if repoTag == IDOrName {
 			return true
 		}
 	}
 	return false
 }
+
+// MatchWithoutTag is exported
+func (image *Image) MatchWithoutTag(IDOrName string) bool {
+	size := len(IDOrName)
+
+	if image.Id == IDOrName || (size > 2 && strings.HasPrefix(image.Id, IDOrName)) {
+		return true
+	}
+
+	name := strings.SplitN(IDOrName, ":", 2)[0]
+
+	for _, repoTag := range image.RepoTags {
+		repoName := strings.SplitN(repoTag, ":", 2)[0]
+		if repoName == name {
+			return true
+		}
+	}
+	return false
+}

cluster/image_test.go

@@ -18,7 +18,24 @@ func TestMatch(t *testing.T) {
 	assert.False(t, img.Match("37"))
 
 	assert.True(t, img.Match("name:latest"))
-	assert.False(t, img.Match("name"))
+	assert.True(t, img.Match("name"))
 	assert.False(t, img.Match("nam"))
 	assert.False(t, img.Match("na"))
 }
+
+func TestMatchWithoutTag(t *testing.T) {
+	img := Image{}
+
+	img.Id = "378954456789"
+	img.RepoTags = []string{"name:latest"}
+
+	assert.True(t, img.MatchWithoutTag("378954456789"))
+	assert.True(t, img.MatchWithoutTag("3789"))
+	assert.True(t, img.MatchWithoutTag("378"))
+	assert.False(t, img.MatchWithoutTag("37"))
+
+	assert.True(t, img.MatchWithoutTag("name:latest"))
+	assert.True(t, img.MatchWithoutTag("name"))
+	assert.False(t, img.MatchWithoutTag("nam"))
+	assert.False(t, img.MatchWithoutTag("na"))
+}