40 lines
1 KiB
Ruby
40 lines
1 KiB
Ruby
require 'form_tag_helper_extensions'
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module FormSpamProtection
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module ClassMethods
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def protect_forms_from_spam(*args)
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before_filter :protect_form_from_spam, *args
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before_filter :protect_form_handler_from_spam, *args
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end
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end
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def protect_form_from_spam
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@protect_form_from_spam = true
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end
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def protect_form_handler_from_spam
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unless request.get? || request.xml_http_request?
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if params[:_form_key] && session[:form_keys]
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key = Digest::SHA1.hexdigest(params[:_form_key])
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if session[:form_keys].keys.include?(key)
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session[:form_keys][key][1] += 1
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if session[:form_keys][key][1] >= 4
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flash[:error] = "You cannot resubmit this form again."
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redirect_to :back
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end
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end
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else
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flash[:error] = "You must have Javascript on, and cookies enabled, to submit this form."
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redirect_to :back
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end
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end
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end
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extend ClassMethods
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def self.included(receiver)
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receiver.extend(ClassMethods)
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end
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end
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