358
edits
User:Ommina: Difference between revisions
Jump to navigation
Jump to search
no edit summary
No edit summary |
|||
| Line 39: | Line 39: | ||
'''Method Two: Server PUSH''' | '''Method Two: Server PUSH''' | ||
With this method, the server takes the active role in advising the client that a new file has arrived. The client must register with the server to receive these advisements, and will be responsible for keeping the login session from timing out, and any NAT router ports open. | With this method, the server takes the active role in advising the client that a new file has arrived. The client must register with the server to receive these advisements, and will be responsible for keeping the login session from timing out, and any NAT router ports open. The UDP packet is sent to the ip and port from which the AUTH command was recieved. | ||
This method compensates for the disadvantages of the polling method, but is more difficult to code. Blocking sockets are no longer an option, nor can a client make any assumptions that an incoming packet will necessarily be a reply to the last command sent. The tag option may be helpful here. | This method compensates for the disadvantages of the polling method, but is more difficult to code. Blocking sockets are no longer an option, nor can a client make any assumptions that an incoming packet will necessarily be a reply to the last command sent. The tag option may be helpful here. | ||