Short Polling vs Long Polling vs WebSockets – System Design | http request là gì

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VIDEO Short Polling vs Long Polling vs WebSockets – System Design

http request là gì



Learn the difference between short polling, long polling, and web sockets.

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Picture Short Polling vs Long Polling vs WebSockets – System Design

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25 bình luận về “Short Polling vs Long Polling vs WebSockets – System Design | http request là gì”

  1. Nice video. A couple of questions
    1. Did you miss SSE (server sent events) which is another variant for server push mechanisms?

    2. Is the connection type between client and resource the same for long polling and websockets? I guess websockets communication happens using a different protocol over HTTP.

    Thanks

  2. I've used short polling with much success. The load on the server is a lot less than with long polling or WebSockets (or server sent events, which you didn't mention). You can have the client check for the mere existence of a particular file on the server, and take no action if it's not found. If you're using shared web hosting and have more than a few clients, short polling is your only practical option. Also, if your users are in a protected network (school, corporation) that wants to inspect packets coming through, you won't be able to establish a websockets (or server sent events) connection. So, short polling isn't a bad as it seems. I know, it sounds horrible sending out Ajax requests every 0.5 seconds, but in the real world, it works pretty good.

  3. I think a nice complimentary video would involve web hooks or some sort of asynchronous callback. Thanks a lot. Also why is short polling bad? At most it makes one connection to the resource just like the other methods. Is it the overhead of setting up connection?

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