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andrei242017-06-17 11:56:15
PHP
andrei24, 2017-06-17 11:56:15

Push notifications in social networks?

For example, on sites such as vk.com, badoo.com, when you receive a message or a like, a notification appears.
But if you look at the console, then there are no web socket connections or ajax requests.
How are these messages sent?

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Sergey Semenko, 2017-06-17
@abler98

no ajax requests

There is. They even have documentation about Long Polling servers.
https://vk.com/dev/using_longpoll

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