AMPXF - AMP for Xenforo 2 1.4.5 Beta 5

• Style compatibility fix to work with XF 2.2.7, thanks @Masetrix for reporting this so quickly

• Added advanced option to enable broken link highlighting on the canonical pages as well for easier cleaning up of broken links

• Much improved handling of proxied images

• Fix bug with non-http/https links sometimes breaking the AMP page validity

This is a beta release, only install it if you know what that means

• Allow html-entities inside href="" as valid URL
• Unknown image dimension magics
  • 2 new Advanced options:
    • Fix unknown image sizes (on by default)
    • Utilize visitors's browsers to check image sizes where server failed (off by default)
      • This option from our own testing is able to find image dimensions for ~5% of the ones where server failed (most other seem to be expired domains/images)
  • new endpoint at /ampimgsize where admins can see short summary of how many image sizes that have been found so far.
  • If you want to see how much impact this feature has on AMP page generation you can add &time=1 to the AMP url and it will print out a debug line with how many image dimensions where fixed in how long time.
    • spoiler alert: it is minimal, most we have seen on our own forum is e.g. "5 images replaced in 0.3ms"
    • note: If no image dimensions were fixed for the page you test on, it won't print out anything.
  • How the image dimension magic works:
    • The first time an image with unknown dimensions is encountered the AMP page will render with the unknown-image class, and the URL will be put in a queue to be checked by the server in a cronjob.
    • Once image dimensions are known, it will be inserted with correct width="" and height="" attributes which the AMP spec wants..

• Added advanced option to hide signatures on AMP pages

• Fix bug with amp-dailymotion videoid containing more info than valid id

• Improved stripping of <script>-tags that are not allowed
• Improved URL check handling when whitespaces are included inside href="..." due to e.g. some Andys addon

• URL checker less strict in case links have whitespaces around them

• Fix compatbility with AddonsLab/Classifieds to work with newer version
  • compatibility check was a bit naive, new check should work for future versions also