fix(server): fix npe in non-auth mode

Author: Tsukilc

hugegraph-server/hugegraph-api/src/main/java/org/apache/hugegraph/api/auth/ManagerAPI.java

@@ -73,7 +73,7 @@ public String createManager(@Context GraphManager manager,
         AuthManager authManager = manager.authManager();
         validUser(authManager, user);
 
-        String creator = HugeGraphAuthProxy.getContext().user().username();
+        String creator = HugeGraphAuthProxy.username();
         switch (type) {
             case SPACE:
                 validGraphSpace(manager, graphSpace);
@@ -124,7 +124,7 @@ public void delete(@Context GraphManager manager,
         AuthManager authManager = manager.authManager();
         validType(type);
         validUser(authManager, user);
-        String actionUser = HugeGraphAuthProxy.getContext().user().username();
+        String actionUser = HugeGraphAuthProxy.username();
 
         switch (type) {
             case SPACE:
@@ -193,7 +193,7 @@ public String checkRole(@Context GraphManager manager,
 
         validType(type);
         AuthManager authManager = manager.authManager();
-        String user = HugeGraphAuthProxy.getContext().user().username();
+        String user = HugeGraphAuthProxy.username();
 
         boolean result;
         switch (type) {

hugegraph-server/hugegraph-api/src/main/java/org/apache/hugegraph/api/profile/GraphsAPI.java

@@ -199,7 +199,7 @@ public Object create(@Context GraphManager manager,
             }
         }
 
-        String creator = HugeGraphAuthProxy.getContext().user().username();
+        String creator = HugeGraphAuthProxy.username();
 
         if (StringUtils.isNotEmpty(clone)) {
             // Clone from existing graph

hugegraph-server/hugegraph-api/src/main/java/org/apache/hugegraph/api/space/GraphSpaceAPI.java

@@ -104,7 +104,7 @@ public String create(@Context GraphManager manager,
 
         jsonGraphSpace.checkCreate(false);
 
-        String creator = HugeGraphAuthProxy.getContext().user().username();
+        String creator = HugeGraphAuthProxy.username();
         GraphSpace exist = manager.graphSpace(jsonGraphSpace.name);
         E.checkArgument(exist == null, "The graph space '%s' has existed",
                         jsonGraphSpace.name);

hugegraph-server/hugegraph-api/src/main/java/org/apache/hugegraph/auth/HugeGraphAuthProxy.java

@@ -186,6 +186,11 @@ public static Context setAdmin() {
     public static Context getContext() {
         // Return task context first
         String taskContext = TaskManager.getContext();
+
+        if (taskContext == null) {
+            return null;
+        }
+
         User user = User.fromJson(taskContext);
         if (user != null) {
             return new Context(user);
@@ -953,6 +958,14 @@ public void updateTime(Date updateTime) {
         this.hugegraph.updateTime(updateTime);
     }
 
+    public static String username() {
+        Context context = HugeGraphAuthProxy.getContext();
+        if (context == null) {
+            return "anonymous";
+        }
+        return context.user.username();
+    }
+
     private <V> Cache<Id, V> cache(String prefix, long capacity,
                                    long expiredTime) {
         String name = prefix + "-" + this.hugegraph.spaceGraphName();