fix: extract with jsonpath

httprunner/response.py

@@ -36,9 +36,20 @@ class ResponseObject(object):
             logger.log_error(err_msg)
             raise exceptions.ParamsError(err_msg)
 
-    def _extract_field_with_jsonpath(self, field):
+    def _extract_field_with_jsonpath(self, field: str) -> list:
-        """
+        """ extract field from response content with jsonpath expression.
         JSONPath Docs: https://goessner.net/articles/JsonPath/
+
+        Args:
+            field: jsonpath expression, e.g. $.code, $..items.*.id
+
+        Returns:
+            A list that extracted from json response example. 1) [200] 2) [1, 2]
+
+        Raises:
+            exceptions.ExtractFailure: If no content matched with jsonpath expression.
+
+        Examples:
             For example, response body like below:
             {
                 "code": 200,
@@ -56,14 +67,24 @@ class ResponseObject(object):
                 "message": "success"
             }
 
-        :param field:  Jsonpath expression, e.g. 1)$.code   2) $..items.*.id
+            >>> _extract_field_with_regex("$.code")
-        :return:       A list that extracted from json repsonse example.    1) [200]   2) [1, 2]
+            [200]
+            >>> _extract_field_with_regex("$..items.*.id")
+            [1, 2]
+
         """
-        result = jsonpath.jsonpath(self.parsed_body(), field)
+        try:
-        if result:
+            json_body = self.json
+            assert json_body
+
+            result = jsonpath.jsonpath(json_body, field)
+            assert result
             return result
-        else:
+        except (AssertionError, exceptions.JSONDecodeError):
-            raise exceptions.ExtractFailure("\tjsonpath {} get nothing\n".format(field))
+            err_msg = u"Failed to extract data with jsonpath! => {}\n".format(field)
+            err_msg += u"response body: {}\n".format(self.text)
+            logger.log_error(err_msg)
+            raise exceptions.ExtractFailure(err_msg)
 
     def _extract_field_with_regex(self, field):
         """ extract field from response content with regex.