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Will HTTP/2 in Azure App Service fallback to HTTP/1.1 if the client browser (mobile) does not support it?

MudassarSaleem-1786 21 Reputation points
2022-10-21T13:58:54.223+00:00

If I have an App Service with HTTP/2.0 configured. So, when the request is coming from browser that does not support HTTP/2.0, will the app service fallback to HTTP/1.1 or not? Is it safe to use th
I couldn't find anything in the documentation regarding this.

Azure App Service
Azure App Service
Azure App Service is a service used to create and deploy scalable, mission-critical web apps.
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  1. Lex Li (Microsoft) 5,567 Reputation points Microsoft Employee
    2022-10-22T03:07:33.23+00:00
    1. Old browsers won't send any HTTP/2 requests, but just HTTP 1.1 requests. So, there isn't any fall back here.
    2. Server side technologies (Azure App Service, nginx, Apache, IIS and etc) are all backward compatible at this moment, so they can serve HTTP/2, HTTP 1.1 and HTTP 1.0 together.

    This has been widely considered a rule of thumb (otherwise, too many things will break), so that's why you usually see no explicit documentation on that.

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