From 56ecb6a3ea53615b3c7b1d1f393b93ee837d3b20 Mon Sep 17 00:00:00 2001
From: Eli Uriegas <seemethere101@gmail.com>
Date: Wed, 22 Feb 2017 11:34:14 -0600
Subject: [PATCH] Inject app into request object

Allows for injection of the app object into the request object through
the request handler.

This allows for users to setup things like database connections etc. in
listeners and then utilize them throughout the their various route
handlers.

Usage is fairly simple like so:
```python
@app.get('/')
async def handler(request):
    request.app.anything
```

Name is up in the air but I'll leave this up for a few days and I'll
change it if we get a consensus
---
 sanic/app.py               |  2 ++
 sanic/request.py           |  3 ++-
 tests/test_request_data.py | 22 +++++++++++++++++++++-
 3 files changed, 25 insertions(+), 2 deletions(-)

diff --git a/sanic/app.py b/sanic/app.py
index 4155e870..6c55a586 100644
--- a/sanic/app.py
+++ b/sanic/app.py
@@ -360,6 +360,8 @@ class Sanic:
             # Request Middleware
             # -------------------------------------------- #
 
+            request.app = self
+
             response = False
             # The if improves speed.  I don't know why
             if self.request_middleware:
diff --git a/sanic/request.py b/sanic/request.py
index 51591f1f..bca0cf27 100644
--- a/sanic/request.py
+++ b/sanic/request.py
@@ -36,7 +36,7 @@ class RequestParameters(dict):
 class Request(dict):
     """Properties of an HTTP request such as URL, headers, etc."""
     __slots__ = (
-        'url', 'headers', 'version', 'method', '_cookies', 'transport',
+        'app', 'url', 'headers', 'version', 'method', '_cookies', 'transport',
         'query_string', 'body',
         'parsed_json', 'parsed_args', 'parsed_form', 'parsed_files',
         '_ip',
@@ -45,6 +45,7 @@ class Request(dict):
     def __init__(self, url_bytes, headers, version, method, transport):
         # TODO: Content-Encoding detection
         url_parsed = parse_url(url_bytes)
+        self.app = None
         self.url = url_parsed.path.decode('utf-8')
         self.headers = headers
         self.version = version
diff --git a/tests/test_request_data.py b/tests/test_request_data.py
index 1d0a3795..c874f71d 100644
--- a/tests/test_request_data.py
+++ b/tests/test_request_data.py
@@ -1,3 +1,5 @@
+import random
+
 from sanic import Sanic
 from sanic.response import json
 from ujson import loads
@@ -14,10 +16,28 @@ def test_storage():
 
     @app.route('/')
     def handler(request):
-        return json({ 'user': request.get('user'), 'sidekick': request.get('sidekick') })
+        return json({'user': request.get('user'), 'sidekick': request.get('sidekick')})
 
     request, response = app.test_client.get('/')
 
     response_json = loads(response.text)
     assert response_json['user'] == 'sanic'
     assert response_json.get('sidekick') is None
+
+
+def test_app_injection():
+    app = Sanic('test_app_injection')
+    expected = random.choice(range(0, 100))
+
+    @app.listener('after_server_start')
+    async def inject_data(app, loop):
+        app.injected = expected
+
+    @app.get('/')
+    async def handler(request):
+        return json({'injected': request.app.injected})
+
+    request, response = app.test_client.get('/')
+
+    response_json = loads(response.text)
+    assert response_json['injected'] == expected