Nginx Brotli : Compression for HTTPS

Abhishek Ghosh

By Abhishek Ghosh August 22, 2016 10:04 am Updated on August 22, 2016

Nginx Brotli : Compression for HTTPS

Previously, we talked about various new methods for speed-up Nginx. Nginx Brotli Compression is a Modern Loseless Compression Algorithm Like gzip. ngx_brotli is a Set of 2 Nginx Modules. Nginx Brotli was not discussed so far as it was not exactly stable. Replacing gzip deflate with Nginx Brotli Compression typically gives an increase of 20% in compression density for text files, while compression and decompression speeds are roughly unchanged. Streams compressed with Brotli have the proposed content encoding type “br”.

Nginx Brotli Compression : Basic Details of Module

Brotli library and Nginx Brotli module are under active development. Brotli is a combination of a modern variant of the LZ77 algorithm, Huffman coding and 2nd order context modeling. It offers more dense compression than gzip.
ngx_brotli is a set of two nginx modules. ngx_brotli filter module is used to compress responses on-the-fly,
ngx_brotli static module used to serve pre-compressed files. Brotli format was developed by Google as Open Source development and has been refined now. Brotli and gzip deflate are very closely related. Both uses a sliding window for backreferences. Gzip uses a fixed 32KB window. While Brotli can use window size from 1KB to 16MB.
Other differences include smaller minimal match length (2 bytes vs 3 bytes), larger maximal match length (16779333 bytes vs 258 bytes).

At time of first publication of this guide, Nginx Brotli Compression is not exactly what is exactly to jump right now for a production server. Testing on test server is suggested. Here is benchmarking – https://blog.quickmediasolutions.com/2015/09/22/benchmarking-brotli.html. You can test community.centminmod.com‘s server with cURL :

curl -vso /dev/null -H"Accept-Encoding: gzip, br" https://community.centminmod.com/

1	curl -vso /dev/null -H"Accept-Encoding: gzip, br" https://community.centminmod.com/

Deploying Nginx Brotli Compression

Official repository is here —

https://github.com/google/ngx_brotli

1	https://github.com/google/ngx_brotli

As with the newer Nginx versions we can add modules easily, but typically Nginx Brotli needs compilation, we are describing all the steps :

apt-get install python2.7 python-dev
cd /opt
git clone https://github.com/google/brotli.git && cd brotli
sudo python setup.py install
cd tests
sudo make
# we now have a ‘bro’ executable in the brotli/tools/ dir
cd /opt # we'll instal Libbrotli wrapper for the Brotli codebase
git clone https://github.com/bagder/libbrotli && cd libbrotli
sudo ./autogen.sh
sudo .configure
sudo make
sudo make install
cd /opt # we’ll set up Nginx module
git clone https://github.com/google/ngx_brotli
sudo apt-get build-dep nginx
cd /opt
mkdir nginx && cd nginx
sudo apt-get source nginx
# above will create a nginx-1.x.x dir with the source code
cd nginx-1.x.x
nano debían/rules
# add the line
#        --add-module=/opt/ngx_brotli \
#
sudo dpkg-buildpackage -b
cd ..
sudo dpkg -i nginx_*_all.deb nginx-full_*_amd64.deb
# In case of error, you may need to run apt-get remove nginx-core and then run the above command

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apt-get install python2.7 python-dev

cd /opt

git clone https://github.com/google/brotli.git && cd brotli

sudo python setup.py install

cd tests

sudo make

# we now have a ‘bro’ executable in the brotli/tools/ dir

cd /opt # we'll instal Libbrotli wrapper for the Brotli codebase

git clone https://github.com/bagder/libbrotli && cd libbrotli

sudo ./autogen.sh

sudo .configure

sudo make

sudo make install

cd /opt # we’ll set up Nginx module

git clone https://github.com/google/ngx_brotli

sudo apt-get build-dep nginx

cd /opt

mkdir nginx && cd nginx

sudo apt-get source nginx

# above will create a nginx-1.x.x dir with the source code

cd nginx-1.x.x

nano debían/rules

# add the line

# --add-module=/opt/ngx_brotli \

#

sudo dpkg-buildpackage -b

cd ..

sudo dpkg -i nginx_*_all.deb nginx-full_*_amd64.deb

# In case of error, you may need to run apt-get remove nginx-core and then run the above command

Example configuration on nginx config file ( /etc/nginx/nginx.conf) is like gzip :

brotli on;
brotli_static on;
brotli_min_length 1000;
brotli_buffers 32 8k;
brotli_comp_level 5;
brotli_types text/plain text/css text/xml application/javascript application/x-javascript application/xml application/xml+rss application/ecmascript application/json image/svg+xml;

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brotli on;

brotli_static on;

brotli_min_length 1000;

brotli_buffers 32 8k;

brotli_comp_level 5;

brotli_types text/plain text/css text/xml application/javascript application/x-javascript application/xml application/xml+rss application/ecmascript application/json image/svg+xml;

Run configtest and restart Nginx.

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Nginx Brotli : Compression for HTTPS

Nginx Brotli Compression : Basic Details of Module

Deploying Nginx Brotli Compression

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