Docker W3C/HTML5 validator instance
Dockerfile for the creation of a self contained W3C Markup validator (with HTML5 validation) instance for fast/offline validation of authored HTML documents.
Setup of such a configuration can be tricky and a little messy so having all this in an isolated and automated way seemed like a good idea.
To build the Docker image, run the following:
This will take some time - performing the following tasks:
- Install Ubuntu base (16.04 LTS), Apache HTTP server, OpenJDK 8, supervisord and a few others.
- Download latest W3C validator source and Validator.nu
vnu.jarportable HTML5 validator jar.
- Configure Perl/CPAN.
- Install and configure W3C validator (including Validator.nu setup).
- Start Apache and Validator.nu under
That's the boring/messy stuff out of the way - your new Docker image should now be built.
Alternatively you can pull this image directly from the Docker Hub registry:
$ docker pull magnetikonline/html5validator
To start the image, run the following:
This will start the image in a new backgrounded container, exposing the following ports:
80(Apache2) to host machine on port
8888(Validator.nu Java server) to host on port
You can of course run the container on an alternative local port if you desire by modifying the
docker run -p switches.
With this complete you should now be able to browse to http://localhost:8080/ and be presented with a working W3C validator instance.