Network error logging example

Prerequisite

Network Error Logging is a mechanism that allows to receive reports about network requests from browser page.

Https needed for NEL work, thats why testing this technology gets little bit complicated. This repository is ready-to-deploy test environment for NEL that can be used on localhost and supports https and multidomain.

How to run

1. Install mkcert;
2. Run mkcert -install it will request password for install root-CA;
3. Execute script for create certificates ./createCert.sh;
4. Run sudo ./setHosts.sh it will add domains to /etc/hosts (thats why it requires sudo);
5. Deploy docker-compose up.

How to test

1. Navigate to https://www.mydomain.local/ in your browser, the response should be hello
2. Wait a little while your browser determines the moment to send a request to collector
3. You will see a POST request to: www.mydomain.local /report-collector/ text in your logs
4. You can manually request collected reports via GET https://www.mydomain.local/report-collector/getRequests

Cleaning up

1. After you are done with testing remove any occurencies of mydomain in your hosts
2. Optionally remove docker image using

docker rmi nel-example_reportcollector -f