fix: 修复变量未定义的Bug

Signed-off-by: Ke Jie <[email protected]>

Author: chzealot

dingtalk_stream/stream.py

@@ -151,6 +151,7 @@ def open_connection(self):
             'localIp': self.get_host_ip()
         }).encode('utf-8')
 
+        http_body = None
         try:
             response = requests.post(DingTalkStreamClient.OPEN_CONNECTION_API,
                                      headers=request_headers,