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Contents
require 'nokogiri'
module CasrackTheAuthenticator
class ServiceTicketValidator
VALIDATION_REQUEST_HEADERS = { 'Accept' => '*/*' }
# Build a validator from a +configuration+, a
# +return_to+ URL, and a +ticket+.
#
# @param [CasrackTheAuthenticator::Configuration] configuration the CAS configuration
# @param [String] return_to_url the URL of this CAS client service
# @param [String] ticket the service ticket to validate
def initialize(configuration, return_to_url, ticket)
@uri = URI.parse(configuration.service_validate_url(return_to_url, ticket))
end
# Request validation of the ticket from the CAS server's
# serviceValidate (CAS 2.0) function.
#
# Swallows all XML parsing errors (and returns +nil+ in those cases).
#
# @return [String, nil] a username if the response is valid; +nil+ otherwise.
#
# @raise any connection errors encountered.
def user
parse_user(get_validation_response_body)
end
private
def get_validation_response_body
result = ''
Net::HTTP.new(@uri.host, @uri.port).start do |c|
response = c.get "#{@uri.path}?#{@uri.query}", VALIDATION_REQUEST_HEADERS
result = response.body
end
result
end
def parse_user(body)
begin
doc = Nokogiri::XML(body)
node = doc.xpath('/cas:serviceResponse/cas:authenticationSuccess/cas:user').first
node ||= doc.xpath('/serviceResponse/authenticationSuccess/user').first # try w/o the namespace just in case
node.nil? ? nil : node.content
rescue Nokogiri::XML::XPath::SyntaxError
nil
end
end
end
end
Version data entries
8 entries across 8 versions & 4 rubygems