/usr/lib/ruby/vendor_ruby/mechanize/page/meta_refresh.rb is in ruby-mechanize 2.3-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# This class encapsulates a meta element with a refresh http-equiv. Mechanize
# treats meta refresh elements just like 'a' tags. MetaRefresh objects will
# contain links, but most likely will have no text.
class Mechanize::Page::MetaRefresh < Mechanize::Page::Link
##
# Time to wait before next refresh
attr_reader :delay
##
# This MetaRefresh links did not contain a url= in the content attribute and
# links to itself.
attr_reader :link_self
##
# Matches the content attribute of a meta refresh element. After the match:
#
# $1:: delay
# $3:: url
CONTENT_REGEXP = /^\s*(\d+\.?\d*)\s*(?:;(?:\s*url\s*=\s*(['"]?)(\S*)\2)?\s*)?$/i
##
# Regexp of unsafe URI characters that excludes % for Issue #177
UNSAFE = /[^\-_.!~*'()a-zA-Z\d;\/?:@&%=+$,\[\]]/
##
# Parses the delay and url from the content attribute of a meta
# refresh element.
#
# Returns an array of [delay, url, link_self], where the first two
# are strings containing the respective parts of the refresh value,
# and link_self is a boolean value that indicates whether the url
# part is missing or empty. If base_uri, the URI of the current
# page is given, the value of url becomes an absolute URI.
def self.parse content, base_uri = nil
m = CONTENT_REGEXP.match(content) or return
delay, url = m[1], m[3]
url &&= url.empty? ? nil : Mechanize::Util.uri_escape(url, UNSAFE)
link_self = url.nil?
if base_uri
url = url ? base_uri + url : base_uri
end
return delay, url, link_self
end
def self.from_node node, page, uri = nil
http_equiv = node['http-equiv'] and
/\ARefresh\z/i =~ http_equiv or return
delay, uri, link_self = parse node['content'], uri
return unless delay
new node, page, delay, uri, link_self
end
def initialize node, page, delay, href, link_self = false
super node, page.mech, page
@delay = delay.include?(?.) ? delay.to_f : delay.to_i
@href = href
@link_self = link_self
end
def noreferrer?
true
end
end
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