note right of User: URI fragment requested for 1st time
User->UserAgent: http://www.example.com/video.ogv#t=10,20
activate UserAgent
note right of UserAgent: No local copy of fragment in buffer
UserAgent->UserAgent: Map fragment to byte ranges
UserAgent->Proxy: GET /video.ogv HTTP/1.1 \nRange: bytes=19147-22890
activate Proxy
Proxy->OriginServer: GET /video.ogv HTTP/1.1 \nRange: bytes=19147-22890
activate OriginServer
note right of OriginServer: Extracts bytes corresponding to range
OriginServer->Proxy: HTTP/1.1 206 Partial Content \nContent-Range: bytes 19147-22890/35614993
deactivate OriginServer
Proxy->UserAgent: HTTP/1.1 206 Partial Content \nContent-Range: bytes 19147-22890/35614993
deactivate Proxy
note right of UserAgent
Byte ranges received that require to serve t=10,20
which may well be slightly more (from a seekable entry point)
end note
UserAgent->UserAgent: Map byte ranges to time-offset
UserAgent->User: Serve the decoded content to the User \nfrom the appropriate time-offset\n to the end-offset