diff --git a/socketio/server.py b/socketio/server.py
index c2c4969..18b2188 100644
--- a/socketio/server.py
+++ b/socketio/server.py
@@ -534,6 +534,16 @@ class Server(object):
         """
         return self.eio.transport(sid)
 
+    def get_environ(self, sid, namespace=None):
+        """Return the WSGI environ dictionary for a client.
+
+        :param sid: The session of the client.
+        :param namespace: The Socket.IO namespace. If this argument is omitted
+                          the default namespace is used.
+        """
+        eio_sid = self.manager.eio_sid_from_sid(sid, namespace or '/')
+        return self.environ.get(eio_sid)
+
     def handle_request(self, environ, start_response):
         """Handle an HTTP request from the client.
 
diff --git a/tests/common/test_server.py b/tests/common/test_server.py
index d8221e3..0732bc3 100644
--- a/tests/common/test_server.py
+++ b/tests/common/test_server.py
@@ -746,6 +746,14 @@ class TestServer(unittest.TestCase):
         with pytest.raises(ValueError):
             s.register_namespace(AsyncNS())
 
+    def test_get_environ(self, eio):
+        s = server.Server()
+        s._handle_eio_connect('123', 'environ')
+        s._handle_eio_message('123', '0')
+        sid = s.manager.sid_from_eio_sid('123', '/')
+        assert s.get_environ(sid) == 'environ'
+        assert s.get_environ('foo') is None
+
     def test_logger(self, eio):
         s = server.Server(logger=False)
         assert s.logger.getEffectiveLevel() == logging.ERROR