From 9375b2c155e9d0a3760516408153ae16733007f0 Mon Sep 17 00:00:00 2001
From: Andrew Svetlov <andrew.svetlov@gmail.com>
Date: Mon, 29 Dec 2014 21:30:26 +0200
Subject: [PATCH 1/2] Add prop

---
 aiohttp/web.py | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/aiohttp/web.py b/aiohttp/web.py
index 252a3c5d85..b611419ca6 100644
--- a/aiohttp/web.py
+++ b/aiohttp/web.py
@@ -409,6 +409,10 @@ def _copy_cookies(self):
             value = cookie.output(header='')[1:]
             self.headers.add('Set-Cookie', value)
 
+    @property
+    def started(self):
+        return self._resp_impl is not None
+
     @property
     def status(self):
         return self._status

From 62bac2e698c6927d525acb32affa05bf1b615b8b Mon Sep 17 00:00:00 2001
From: Andrew Svetlov <andrew.svetlov@gmail.com>
Date: Mon, 29 Dec 2014 21:56:50 +0200
Subject: [PATCH 2/2] Add tests, docs and CHANGES for resp.started

---
 CHANGES.txt                | 6 ++++++
 docs/web.rst               | 5 +++++
 tests/test_web_response.py | 9 +++++++++
 3 files changed, 20 insertions(+)

diff --git a/CHANGES.txt b/CHANGES.txt
index 0dc82057fa..aacf66d7fc 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -1,6 +1,12 @@
 CHANGES
 =======
 
+0.13.1 (Unreleased)
+--------------------
+
+- Add `aiohttp.web.StreamResponse.started` property #213
+
+
 0.13.0 (12-29-2014)
 -------------------
 
diff --git a/docs/web.rst b/docs/web.rst
index f17d453625..99a4e981d9 100644
--- a/docs/web.rst
+++ b/docs/web.rst
@@ -474,6 +474,11 @@ StreamResponse
                       parameter. Otherwise pass :class:`str` with
                       arbitrary *status* explanation..
 
+   .. attribute:: started
+
+      Read-only :class:`bool` property, ``True`` if :meth:`start` has
+      been called, ``False`` otherwise.
+
    .. attribute:: status
 
       Read-only property for *HTTP response status code*, :class:`int`.
diff --git a/tests/test_web_response.py b/tests/test_web_response.py
index 8356a8158f..865d108630 100644
--- a/tests/test_web_response.py
+++ b/tests/test_web_response.py
@@ -425,3 +425,12 @@ def test_set_text_with_charset(self):
         self.assertEqual("текст", resp.text)
         self.assertEqual("текст".encode('koi8-r'), resp.body)
         self.assertEqual("koi8-r", resp.charset)
+
+    def test_started_when_not_started(self):
+        resp = StreamResponse()
+        self.assertFalse(resp.started)
+
+    def test_started_when_started(self):
+        resp = StreamResponse()
+        resp.start(self.make_request('GET', '/'))
+        self.assertTrue(resp.started)