Allow Ansible to honor the "no_proxy" environment varaible.

lib/ansible/module_utils/urls.py

@@ -252,9 +252,33 @@ class SSLValidationHandler(urllib2.BaseHandler):
         except:
             self.module.fail_json(msg='Connection to proxy failed')
 
+    def detect_no_proxy(self, url):
+        '''
+        Detect if the 'no_proxy' environment variable is set and honor those locations.
+        '''
+        env_no_proxy = os.environ.get('no_proxy')
+        if env_no_proxy:
+            env_no_proxy = env_no_proxy.split(',')
+            netloc = urlparse.urlparse(url).netloc
+
+            for host in env_no_proxy:
+                if netloc.endswith(host) or netloc.split(':')[0].endswith(host):
+                    # Our requested URL matches something in no_proxy, so don't
+                    # use the proxy for this
+                    return False
+        return True
+
     def http_request(self, req):
         tmp_ca_cert_path, paths_checked = self.get_ca_certs()
         https_proxy = os.environ.get('https_proxy')
+
+        # Detect if 'no_proxy' environment variable is set and if our URL is included
+        use_proxy = self.detect_no_proxy(req.get_full_url())
+
+        if not use_proxy:
+            # ignore proxy settings for this host request
+            return req
+
         try:
             s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
             if https_proxy: