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module ActionView
# = Action View CSRF Helper
module Helpers
module CsrfHelper
# Returns meta tags "csrf-param" and "csrf-token" with the name of the cross-site
# request forgery protection parameter and token, respectively.
#
# <head>
# <%= csrf_meta_tags %>
# </head>
#
# These are used to generate the dynamic forms that implement non-remote links with
# <tt>:method</tt>.
#
# Note that regular forms generate hidden fields, and that Ajax calls are whitelisted,
# so they do not use these tags.
def csrf_meta_tags
if protect_against_forgery?
[
tag('meta', :name => 'csrf-param', :content => request_forgery_protection_token),
tag('meta', :name => 'csrf-token', :content => form_authenticity_token)
].join("\n").html_safe
end
end
# For backwards compatibility.
alias csrf_meta_tag csrf_meta_tags
end
end
end
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