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Can I use page says that Chrome supports brotli for some time now. I would think that the Accept-Encoding string would be like this:
Accept-Encoding:gzip, deflate, sdch, br
But I checked on a request to StackOverflow e.g. and it does not contain brotli:
Accept-Encoding:gzip, deflate, sdch
I suppose most web servers won't really return you brotli if it's not in Accept-Encoding, so it's kind of partially supported only it seems.
Is it going to be added later or there is some trick I don't know of?
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Brotli is primarily used by web servers and content delivery networks to compress HTTP content, making internet websites load faster. A successor to gzip, it is supported by all major web browsers and has become increasingly popular, as it provides better compression than gzip.
For both of these browsers, Brotli is only used for HTTPS requests, not for plain HTTP requests. The reason only HTTPS is supported is because many network proxies around the world expect HTTP compression to always be gzip, so using other types of compression can cause websites to break.
gzip compressionThis HTTP header is supported in effectively all browsers.
There are many blog posts about this if you Google it. Here's one:
https://samsaffron.com/archive/2016/06/15/the-current-state-of-brotli-compression
Brotli is HTTPS only
If you visit a site over HTTP your browser will not accept the br encoding. The reasoning for this is documented at the end of the chromium issue.
The Chromium issue linked is here:
https://bugs.chromium.org/p/chromium/issues/detail?id=452335
Make sure you are going to https://stackoverflow.com instead of http://stackoverflow.com
EDIT: StackOverflow can no longer be accessed on non HTTPS connection.
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