urinorm.rb
75 lines
| 1.8 KiB
| text/x-ruby
|
RubyLexer
Eric Davis
|
r2376 | require 'uri' | ||
| require "openid/extras" | ||||
| module OpenID | ||||
| module URINorm | ||||
| public | ||||
| def URINorm.urinorm(uri) | ||||
| uri = URI.parse(uri) | ||||
| raise URI::InvalidURIError.new('no scheme') unless uri.scheme | ||||
| uri.scheme = uri.scheme.downcase | ||||
| unless ['http','https'].member?(uri.scheme) | ||||
| raise URI::InvalidURIError.new('Not an HTTP or HTTPS URI') | ||||
| end | ||||
| raise URI::InvalidURIError.new('no host') unless uri.host | ||||
| uri.host = uri.host.downcase | ||||
| uri.path = remove_dot_segments(uri.path) | ||||
| uri.path = '/' if uri.path.length == 0 | ||||
| uri = uri.normalize.to_s | ||||
| uri = uri.gsub(PERCENT_ESCAPE_RE) { | ||||
| sub = $&[1..2].to_i(16).chr | ||||
| reserved(sub) ? $&.upcase : sub | ||||
| } | ||||
| return uri | ||||
| end | ||||
| private | ||||
| RESERVED_RE = /[A-Za-z0-9._~-]/ | ||||
| PERCENT_ESCAPE_RE = /%[0-9a-zA-Z]{2}/ | ||||
| def URINorm.reserved(chr) | ||||
| not RESERVED_RE =~ chr | ||||
| end | ||||
| def URINorm.remove_dot_segments(path) | ||||
| result_segments = [] | ||||
| while path.length > 0 | ||||
| if path.starts_with?('../') | ||||
| path = path[3..-1] | ||||
| elsif path.starts_with?('./') | ||||
| path = path[2..-1] | ||||
| elsif path.starts_with?('/./') | ||||
| path = path[2..-1] | ||||
| elsif path == '/.' | ||||
| path = '/' | ||||
| elsif path.starts_with?('/../') | ||||
| path = path[3..-1] | ||||
| result_segments.pop if result_segments.length > 0 | ||||
| elsif path == '/..' | ||||
| path = '/' | ||||
| result_segments.pop if result_segments.length > 0 | ||||
| elsif path == '..' or path == '.' | ||||
| path = '' | ||||
| else | ||||
| i = 0 | ||||
| i = 1 if path[0].chr == '/' | ||||
| i = path.index('/', i) | ||||
| i = path.length if i.nil? | ||||
| result_segments << path[0...i] | ||||
| path = path[i..-1] | ||||
| end | ||||
| end | ||||
| return result_segments.join('') | ||||
| end | ||||
| end | ||||
| end | ||||