Varnish Http Gzip Support

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How GZIP, and GZIP+ESI works in Varnish - Varnish HTTP Cache

    https://varnish-cache.org/docs/3.0/phk/gzip.html
    Even if the client does not support gzip, you can force the A-C header to "gzip" to save bandwidth between the backend and varnish, varnish will gunzip the object before delivering to the client. In vcl_miss{} you can remove the "Accept-Encoding: gzip" header, if you do …

Varnish (software) - Wikipedia

    https://en.wikipedia.org/wiki/Varnish_(software)
    Varnish is an HTTP accelerator designed for content-heavy dynamic web sites as well as APIs. In contrast to other web accelerators, such as Squid, which began life as a client-side cache, or Apache and nginx, which are primarily origin servers, Varnish was designed as an HTTP accelerator.Varnish is focused exclusively on HTTP, unlike other proxy servers that often support FTP, SMTP and other ...License: two-clause BSD license

Varnish Cache and Brotli Compression

    https://info.varnish-software.com/blog/varnish-cache-brotli-compression
    This allowed Varnish Cache to store multiple encodings for each request and deliver the matching encoding to the client. When Varnish Cache released native gzip encoding support in 3.0, this changed. The first change was that Varnish Cache will always request gzip encoding from the backend.

What do you want to achieve with Varnish? — Varnish Wiki ...

    https://www.varnish-software.com/wiki/start/your_varnish_goals.html
    The http_gzip_support = on And beresp.do_gzip and beresp.do_gunzip are NOT used in VCL. Unless while returning from vcl_recv with pipe or pass, Varnish modifies req-http-Encoding that is say, the req.http.Accept-Encoding is set to “gzip” that means this client supports compressed content.

Saving a Request — The Varnish Book

    http://book.varnish-software.com/4.0/chapters/Saving_a_Request.html
    The main goal of grace mode is to avoid requests to pile up whenever a popular object has expired in cache. To understand better grace mode, recall Fig. 2 which shows the lifetime of cached objects. When possible, Varnish delivers a fresh object, otherwise Varnish builds a response from a stale object and triggers an asynchronous refresh request.

Design Principles — The Varnish Book

    http://book.varnish-software.com/4.0/chapters/Design_Principles.html
    HTTP specifies that multiple objects can be served from the same URL depending on the preferences of the client. For instance, content in gzip format is sent only to clients that indicate gzip support. Varnish stores a single compressed object under one hash key.



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