Webtools HTML 2 Media integration

[steeff]

Hi,
An interesting alternative to generate a print or PDF version of pages is to use the Webtools HTML 2 Media service https://webgate.ec.europa.eu/fpfis/wikis/display/webtools/HTML+2+Media .
It does not require to install any 3rd party libraries on the server and externalize the workload. the downside is that it can only convert public pages that can be read by the webservice.
At DG Grow for several projects we are using this feature and developed a generic module that provides:

• a block with a link to the pdf version of the page (and can be used out of the box by a site builder)
• a route that implement webservice parameters to retrieve the binary file url
• a service to get the file url programmatically
  all kind of errors should be handled

PR #192

[brummbar]

Thanks @steeff , this looks interesting! I'll create a ticket to have a review of the code.