Added urlfetch adapter

Author: jpatel531

pusher/urlfetch.py

@@ -0,0 +1,27 @@
+# -*- coding: utf-8 -*-
+
+from __future__ import (print_function, unicode_literals, absolute_import,
+                        division)
+
+import urlfetch
+import json
+from pusher.http import process_response
+
+class URLFetchBackend(object):
+  """Adapter for the URLFetch Module. Necessary for using this library with Google
+  App Engine"""
+
+  def __init__(self, config, **options):
+    self.config = config
+    self.options = options
+  
+  def send_request(self, request):
+    resp = urlfetch.fetch(
+      url=request.url,
+      headers=request.headers,
+      method=request.method,
+      data=request.body,
+      deadline=self.config.timeout,
+      **self.options
+    )
+    return process_response(resp.status_code, resp.content)

setup.py

@@ -27,6 +27,7 @@
     extras_require={
         'aiohttp': ["aiohttp>=0.9.0"],
         'tornado': ['tornado>=4.0.0'],
+        'urlfetch': ['urlfetch>=1.0']
     },
 
     test_suite='pusher_tests',