Link to previous page if internal request
Sometimes you would like to let the user navigate to a previous page in history.
However, you don’t want to let the user navigate to a previous url that is from another website.
Here’s how I prevent
Determine if the URL is from the current website:
def internal_request?
previous_url = request.referrer
return false if previous_url.blank?
referrer = URI.parse(previous_url)
return true if referrer.host == request.host
false
end
Hide link “Back” if the request is not from current website:
if internal_request?
# link_to 'Back', 'javascript:history.back()'
link_to 'Back', request.referrer
end
That’s it!
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