Set ssl NO_COMPRESSION if present

Author: asvetlov

aiohttp/connector.py

@@ -263,6 +263,7 @@ def ssl_context(self):
                 sslcontext = ssl.SSLContext(ssl.PROTOCOL_SSLv23)
                 sslcontext.options |= ssl.OP_NO_SSLv2
                 sslcontext.options |= ssl.OP_NO_SSLv3
+                sslcontext.options |= getattr(ssl, "OP_NO_COMPRESSION", 0)
                 sslcontext.set_default_verify_paths()
                 sslcontext.verify_mode = ssl.CERT_REQUIRED
             self._ssl_context = sslcontext