The only official way to share with Google+ is + 1 button . Users can add a comment when they share, but the title is automatically pulled from the <title/> attribute on HTML pages.
Facebook has a button that works just like a +1 button. Users will have the opportunity to add a comment to this, but the link title will be automatically pulled out of the HTML page.
Facebook also supports the post method through its API. You can create sharing with one click, but users will have to authenticate and allow access to your application. The title will still be automatically populated from the page.
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