This guide covers the Layer0 response compression support.
Accept-Encoding
When requesting data via HTTP from the Layer0 servers, browsers include the accept-encoding
header to indicate which data compression formats the browser supports. Modern browsers accept multiple compression formats, Accept-Encoding Header Details are here. This header is required by Layer0 to trigger compression of responses.
Layer0 supports
gzip
for all versionsbr
(Brotli) for versions >=4.11.0
Enabling Brotli compression
To enable Brotli (br
) compression you need to ensure your project uses a version of @layer0
>= 4.11.0
. To upgrade @layer0
to the latest version in your project use 0 use latest
and redeploy your project.
What is Compressed?
When Layer0 servers receive a request they inspect the accept-encoding
header. The following logic is used to determine response compression:
- If the response is not a compressible type, return uncompressed.
- Else if
br
is found and the@layer0
version is >=4.11.0
then compress the response using Brotli. - Else if
gzip
is found, then compress the response using gzip. - Else no compression is used.
Compressible Types
A response is considered compressible if the content-type
contains one of these strings:
text/html
application/x-javascript
text/css
application/javascript
text/javascript
application/json
application/vnd.ms-fontobject
application/x-font-opentype
application/x-font-truetype
application/x-font-ttf
application/xml
font/eot
font/opentype
font/otf
image/svg+xml
image/vnd.microsoft.icon
text/plain
text/xml
or the url ends in one of these file extensions:
.css
.js
.html
.eot
.ico
.otf
.ttf
.json
.svg