cors-workaround

CORS Workaround

A docker-compose setup to run a local instance from language-tool server in a Firefox extension compatible way.

This configuration solves the Erikvl87#40 problem (LT's Firefox extension refuses to connect to the local server because the CORS directives are not configured correctly).

The docker-compose.yml file builds a minimal image based on NGINX Alpine and configures it to proxy the LT container with the CORS configuration and port that the extension expects.

It also pipes NGINX logs to stdout for an easier debugging.

Structure

├── docker-compose.yml
├── nginx
│   ├── Dockerfile
│   └── nginx.conf
└── README.md

Changes

docker-compose.yml

• ngrams are mounted from \home\<user>\ngrams.
• Mapping for cors container to port 8081

nginx/Dockerfile

• NGINX logs are piped to stdout

nginx/nginx.conf

conf	new value
server	languagetool:8010;
listen	8081
proxy_pass	http://language-tools/;
upstream	language-tools
proxy_hide_header directive	'Access-Control-Allow-Origin';

Credits

All credits to @Erikvl87 for the docker-languagetool image and to @maximillianfx for the docker-nginx-cors image.