From: Zhicheng Wei <zhicheng@opensourceforge.net>
Date: Mon, 22 Feb 2016 08:02:01 +0000 (+0800)
Subject: render() should raise an error when finish() already called
X-Git-Tag: v4.4.0b1~36^2
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=refs%2Fpull%2F1648%2Fhead;p=thirdparty%2Ftornado.git

render() should raise an error when finish() already called
---

diff --git a/tornado/web.py b/tornado/web.py
index 8826c62b0..d1cb7391a 100644
--- a/tornado/web.py
+++ b/tornado/web.py
@@ -696,6 +696,8 @@ class RequestHandler(object):
 
     def render(self, template_name, **kwargs):
         """Renders the template with the given arguments as the response."""
+        if self._finished:
+            raise RuntimeError("Cannot render() after finish()")
         html = self.render_string(template_name, **kwargs)
 
         # Insert the additional JS and CSS added by the modules on the page