HTTP 1.0 vs 1.1
HTTP/1.0 will only work for retrieving (GET) content from a Swarm cluster. We do not recommend using 1.0 because of its limitations. Please use HTTP version 1.1+ for complete Swarm compatibility. Other 1.1 features that Swarm uses are:
Content-MD5 header
Digest Authentication
Persistent Connections
Range Requests and 206 response code
Pipelining
Cache control / Cache consistency