Setup nginx to redirect Google's _escaped_fragment_= request to a snapshots folder

gistfile1.nginxconf

# This should be inserted into the server {...} block.

# These lines rewrite the url to access the snapshots folder, or where ever you keep
# you prerendered pages (mainly used when working with pages rendered by JavaScript). 
#
# example.com/?_escaped_fragment_=              --> example.com/snapshots/index.html
# example.com/?_escaped_fragment_=/blog         --> example.com/snapshots/blog.html
# example.com/?_escaped_fragment_=/blog/post    --> example.com/snapshots/blog/post.html

# Captures URLs with any amount of levels   (?_escaped_fragment_=/.../...)
if ($args ~ "_escaped_fragment_=(.+)") {
    set $real_url $1;
}

# Captures URL with no level                (?_escaped_fragment_=)
if ($args = "_escaped_fragment_=") {
    set $real_url index;
}

# Redirects the request if the URL contains "_escaped_fragment_="
if ($args ~ "_escaped_fragment_=") {
    # You can replace the "snapshots" with whatever folder you keep your prerendered pages in.
    rewrite ^ /snapshots/$real_url.html;
}