Google+’ +1 button generator only shows options for generating dynamic buttons (i.e. via client-side scripting).
For reasons related to German privacy & data protection law, this isn’t acceptable on our website: we need a static link for users to click, without loading scripts or even iframes from third parties.
Luckily, Facebook, Twitter and Google+ actually allow providing sharing links via static URIs, as the related question “Google +1 something via a URL” shows.
In particular, for Google+, the following link allows sharing a URI:
https://plusone.google.com/_/+1/confirm?url={url}&title={title}
Unfortunately, this does not +1 the page, even though the dialog goes as far as saying “You publicly recommended this as {your name here}”. But the page neither shows up in my “+1’s” on Google+, nor in the “+1 Reports” on Google Webmaster Tools.
Is there a way of +1’ing a page via a static URI?