1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
|
require "openid/yadis/htmltokenizer"
require 'cgi'
module OpenID
module Yadis
def Yadis.html_yadis_location(html)
parser = HTMLTokenizer.new(html)
# to keep track of whether or not we are in the head element
in_head = false
begin
while el = parser.getTag('head', '/head', 'meta', 'body', '/body',
'html', 'script')
# we are leaving head or have reached body, so we bail
return nil if ['/head', 'body', '/body'].member?(el.tag_name)
if el.tag_name == 'head'
unless el.to_s[-2] == ?/ # tag ends with a /: a short tag
in_head = true
end
end
next unless in_head
if el.tag_name == 'script'
unless el.to_s[-2] == ?/ # tag ends with a /: a short tag
parser.getTag('/script')
end
end
return nil if el.tag_name == 'html'
if el.tag_name == 'meta' and (equiv = el.attr_hash['http-equiv'])
if ['x-xrds-location','x-yadis-location'].member?(equiv.downcase) &&
el.attr_hash.member?('content')
return CGI::unescapeHTML(el.attr_hash['content'])
end
end
end
rescue HTMLTokenizerError # just stop parsing if there's an error
end
end
end
end
|
