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Web API subject assignment

Sometimes multiple clients need to be updated over the web on a regular basis. For example, consider a game between two or more players or a chat program for multiple people. In either case, relying on regular HTTP requests from each client to keep everyone synchronized leads to the following problems:

• The server has to handle a lot of requests even if it has nothing to report.
• Lags exist if clients do not poll as often.
• The server must coordinate versioning for each client.
• The server cannot detect if a client has dropped its connection.

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