opengraph is a Go library for extracting Open Graph metadata from html documents.
Documentation: http://godoc.org/github.com/rojters/opengraph
Open Graph protocol: http://ogp.me/
Build Status: 
import "github.com/rojters/opengraph"To extract Open Graph metadata from a movie on IMDb:
res, _ := http.Get("http://www.imdb.com/title/tt0118715/")
og, _ := opengraph.Extract(res.Body)
for _, md := range og {
fmt.Printf("%s = %s\n", md.Property, md.Content)
}Which will output:
url = http://www.imdb.com/title/tt0118715/
type = video.movie
title = The Big Lebowski (1998)
site_name = IMDb
description = Directed by Joel Coen, Ethan Coen. With Jeff Bridges ...
...
MIT