swarm/api: fixed 404 handling on missing default entry (#15139)

swarm/api/api.go

@@ -144,9 +144,13 @@ func (self *Api) Get(key storage.Key, path string) (reader storage.LazySectionRe
 	if entry != nil {
 		key = common.Hex2Bytes(entry.Hash)
 		status = entry.Status
-		mimeType = entry.ContentType
-		log.Trace(fmt.Sprintf("content lookup key: '%v' (%v)", key, mimeType))
-		reader = self.dpa.Retrieve(key)
+		if status == http.StatusMultipleChoices {
+			return
+		} else {
+			mimeType = entry.ContentType
+			log.Trace(fmt.Sprintf("content lookup key: '%v' (%v)", key, mimeType))
+			reader = self.dpa.Retrieve(key)
+		}
 	} else {
 		status = http.StatusNotFound
 		err = fmt.Errorf("manifest entry for '%s' not found", path)