fix typo，应该是 http 开头的

judge_dispatcher/tasks.py

@@ -40,8 +40,9 @@ class JudgeDispatcher(object):
                 JudgeWaitingQueue.objects.create(submission_id=self.submission.id)
                 return
 
-            s = TimeoutServerProxy(judge_server.ip + ":" + judge_server.port, timeout=20)
-            data = s.run(self.submission.id, self.submission.language_code,
+            s = TimeoutServerProxy("http://" + judge_server.ip + ":" + str(judge_server.port), timeout=20)
+
+            data = s.run(self.submission.id, self.submission.language,
                          self.submission.code, self.time_limit, self.memory_limit, self.test_case_id)
             # 编译错误
             if data["code"] == 1: