1236 1195

======== BEGIN INBOUND STREAM ========
GET http://example.com/ HTTP/1.1
Host: example.com
User-Agent: demo

======== BEGIN OUTBOUND STREAM ========
HTTP/1.1 407 Proxy Authentication Required
Date: Thu, 31 Dec 2015 18:26:56 GMT
Content-Type: text/plain
Content-Length: 21

Not so fast, agent!
