TextFile1.txt

M-SEARCH * HTTP/1.1  <- * = request uri
S: uuid:ijklmnop-7dec-11d0-a765-00a0c91e6bf6 
Host: 239.255.255.250:reservedSSDPport 
Man: "ssdp:discover" 
ST: ge:fridge  <-- service type MUST
MX: 3 <- delay response

HTTP/1.1 200 OK 
S: uuid:ijklmnop-7dec-11d0-a765-00a0c91e6bf6 
Ext: 
Cache-Control: no-cache="Ext", max-age = 5000  <- should also (expires)
ST: ge:fridge  <- MUST
USN: uuid:abcdefgh-7dec-11d0-a765-00a0c91e6bf6  <- MUST
AL: <blender:ixl><http://foo/bar> <- location should (also Location)

NOTIFY * HTTP/1.1 
Host: 239.255.255.250:reservedSSDPport 
NT: blenderassociation:blender  <- MUST service type
NTS: ssdp:alive 
USN: someunique:idscheme3  <- MUST
AL: <blender:ixl><http://foo/bar>  <- SHOULD also location
Cache-Control: max-age = 7393 <- SHOULD also expires

NOTIFY * HTTP/1.1 
Host: 239.255.255.250:reservedSSDPport 
NT: someunique:idscheme3  <- MUST service type
NTS: ssdp:byebye 
USN: someunique:idscheme3  <- MUST