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# frozen_string_literal: true
module ActionView
# = Action View CSRF Helper
module Helpers #:nodoc:
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>.
#
# You don't need to use these tags for regular forms as they generate their own hidden fields.
#
# For AJAX requests other than GETs, extract the "csrf-token" from the meta-tag and send as the
# "X-CSRF-Token" HTTP header. If you are using rails-ujs this happens automatically.
#
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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