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) presented to host on
8888(Validator.nu Java server) presented to host on
Running the container on alternative local ports is controlled via
docker run --publish arguments.
With this complete you should now be able to browse to http://localhost:8080/ and be presented with a working W3C validator instance.