1128 1122

======== BEGIN INBOUND STREAM ========
PUT /articles/123/ HTTP/1.1
Host: example.com
If-Modified-Since: Thu, 31 Dec 2015 17:03:09 GMT
User-Agent: demo
Content-Type: text/plain
Content-Length: 16

Hello world!

======== BEGIN OUTBOUND STREAM ========
HTTP/1.1 412 Precondition Failed
Date: Thu, 31 Dec 2015 18:26:56 GMT
Content-Type: text/plain
Content-Length: 9

No way.
