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#-- # = uri/common.rb # # Author:: Akira Yamada <akira@ruby-lang.org> # Revision:: $Id: common.rb 42355 2013-08-03 13:27:01Z nagachika $ # License:: # You can redistribute it and/or modify it under the same term as Ruby. # # See URI for general documentation # module URI # # Includes URI::REGEXP::PATTERN # module REGEXP # # Patterns used to parse URI's # module PATTERN # :stopdoc: # RFC 2396 (URI Generic Syntax) # RFC 2732 (IPv6 Literal Addresses in URL's) # RFC 2373 (IPv6 Addressing Architecture) # alpha = lowalpha \| upalpha ALPHA = "a-zA-Z" # alphanum = alpha \| digit ALNUM = "#{ALPHA}\\d" # hex = digit \| "A" \| "B" \| "C" \| "D" \| "E" \| "F" \| # "a" \| "b" \| "c" \| "d" \| "e" \| "f" HEX = "a-fA-F\\d" # escaped = "%" hex hex ESCAPED = "%[#{HEX}]{2}" # mark = "-" \| "_" \| "." \| "!" \| "~" \| "" \| "'" \| # "(" \| ")" # unreserved = alphanum \| mark UNRESERVED = "\\-_.!~'()#{ALNUM}" # reserved = ";" \| "/" \| "?" \| ":" \| "@" \| "&" \| "=" \| "+" \| # "$" \| "," # reserved = ";" \| "/" \| "?" \| ":" \| "@" \| "&" \| "=" \| "+" \| # "$" \| "," \| "[" \| "]" (RFC 2732) RESERVED = ";/?:@&=+$,\\[\\]" # domainlabel = alphanum \| alphanum ( alphanum \| "-" ) alphanum DOMLABEL = "(?:[#{ALNUM}](?:[-#{ALNUM}][#{ALNUM}])?)" # toplabel = alpha \| alpha ( alphanum \| "-" ) alphanum TOPLABEL = "(?:[#{ALPHA}](?:[-#{ALNUM}][#{ALNUM}])?)" # hostname = ( domainlabel "." ) toplabel [ "." ] HOSTNAME = "(?:#{DOMLABEL}\\.)#{TOPLABEL}\\.?" # :startdoc: end # PATTERN # :startdoc: end # REGEXP # class that Parses String's into URI's # # It contains a Hash set of patterns and Regexp's that match and validate. # class Parser include REGEXP # # == Synopsis # # URI::Parser.new([opts]) # # == Args # # The constructor accepts a hash as options for parser. # Keys of options are pattern names of URI components # and values of options are pattern strings. # The constructor generetes set of regexps for parsing URIs. # # You can use the following keys: # # * :ESCAPED (URI::PATTERN::ESCAPED in default) # * :UNRESERVED (URI::PATTERN::UNRESERVED in default) # * :DOMLABEL (URI::PATTERN::DOMLABEL in default) # * :TOPLABEL (URI::PATTERN::TOPLABEL in default) # * :HOSTNAME (URI::PATTERN::HOSTNAME in default) # # == Examples # # p = URI::Parser.new(:ESCAPED => "(?:%[a-fA-F0-9]{2}\|%u[a-fA-F0-9]{4})") # u = p.parse("http://example.jp/%uABCD") #=> #<URI::HTTP:0xb78cf4f8 URL:http://example.jp/%uABCD> # URI.parse(u.to_s) #=> raises URI::InvalidURIError # # s = "http://examle.com/ABCD" # u1 = p.parse(s) #=> #<URI::HTTP:0xb78c3220 URL:http://example.com/ABCD> # u2 = URI.parse(s) #=> #<URI::HTTP:0xb78b6d54 URL:http://example.com/ABCD> # u1 == u2 #=> true # u1.eql?(u2) #=> false # def initialize(opts = {}) @pattern = initialize_pattern(opts) @pattern.each_value {\|v\| v.freeze} @pattern.freeze @regexp = initialize_regexp(@pattern) @regexp.each_value {\|v\| v.freeze} @regexp.freeze end # The Hash of patterns. # # see also URI::Parser.initialize_pattern attr_reader :pattern # The Hash of Regexp # # see also URI::Parser.initialize_regexp attr_reader :regexp # Returns a split URI against regexp[:ABS_URI] def split(uri) case uri when '' # null uri when @regexp[:ABS_URI] scheme, opaque, userinfo, host, port, registry, path, query, fragment = $~[1..-1] # URI-reference = [ absoluteURI \| relativeURI ] [ "#" fragment ] # absoluteURI = scheme ":" ( hier_part \| opaque_part ) # hier_part = ( net_path \| abs_path ) [ "?" query ] # opaque_part = uric_no_slash uric # abs_path = "/" path_segments # net_path = "//" authority [ abs_path ] # authority = server \| reg_name # server = [ [ userinfo "@" ] hostport ] if !scheme raise InvalidURIError, "bad URI(absolute but no scheme): #{uri}" end if !opaque && (!path && (!host && !registry)) raise InvalidURIError, "bad URI(absolute but no path): #{uri}" end when @regexp[:REL_URI] scheme = nil opaque = nil userinfo, host, port, registry, rel_segment, abs_path, query, fragment = $~[1..-1] if rel_segment && abs_path path = rel_segment + abs_path elsif rel_segment path = rel_segment elsif abs_path path = abs_path end # URI-reference = [ absoluteURI \| relativeURI ] [ "#" fragment ] # relativeURI = ( net_path \| abs_path \| rel_path ) [ "?" query ] # net_path = "//" authority [ abs_path ] # abs_path = "/" path_segments # rel_path = rel_segment [ abs_path ] # authority = server \| reg_name # server = [ [ userinfo "@" ] hostport ] else raise InvalidURIError, "bad URI(is not URI?): #{uri}" end path = '' if !path && !opaque # (see RFC2396 Section 5.2) ret = [ scheme, userinfo, host, port, # X registry, # X path, # Y opaque, # Y query, fragment ] return ret end # # == Args # # +uri+:: # String # # == Description # # parses +uri+ and constructs either matching URI scheme object # (FTP, HTTP, HTTPS, LDAP, LDAPS, or MailTo) or URI::Generic # # == Usage # # p = URI::Parser.new # p.parse("ldap://ldap.example.com/dc=example?user=john") # #=> #<URI::LDAP:0x00000000b9e7e8 URL:ldap://ldap.example.com/dc=example?user=john> # def parse(uri) scheme, userinfo, host, port, registry, path, opaque, query, fragment = self.split(uri) if scheme && URI.scheme_list.include?(scheme.upcase) URI.scheme_list[scheme.upcase].new(scheme, userinfo, host, port, registry, path, opaque, query, fragment, self) else Generic.new(scheme, userinfo, host, port, registry, path, opaque, query, fragment, self) end end # # == Args # # +uris+:: # an Array of Strings # # == Description # # Attempts to parse and merge a set of URIs # def join(uris) uris[0] = convert_to_uri(uris[0]) uris.inject :merge end # # :call-seq: # extract( str ) # extract( str, schemes ) # extract( str, schemes ) {\|item\| block } # # == Args # # +str+:: # String to search # +schemes+:: # Patterns to apply to +str+ # # == Description # # Attempts to parse and merge a set of URIs # If no +block+ given , then returns the result, # else it calls +block+ for each element in result. # # see also URI::Parser.make_regexp # def extract(str, schemes = nil) if block_given? str.scan(make_regexp(schemes)) { yield $& } nil else result = [] str.scan(make_regexp(schemes)) { result.push $& } result end end # returns Regexp that is default self.regexp[:ABS_URI_REF], # unless +schemes+ is provided. Then it is a Regexp.union with self.pattern[:X_ABS_URI] def make_regexp(schemes = nil) unless schemes @regexp[:ABS_URI_REF] else /(?=#{Regexp.union(schemes)}:)#{@pattern[:X_ABS_URI]}/x end end # # :call-seq: # escape( str ) # escape( str, unsafe ) # # == Args # # +str+:: # String to make safe # +unsafe+:: # Regexp to apply. Defaults to self.regexp[:UNSAFE] # # == Description # # constructs a safe String from +str+, removing unsafe characters, # replacing them with codes. # def escape(str, unsafe = @regexp[:UNSAFE]) unless unsafe.kind_of?(Regexp) # perhaps unsafe is String object unsafe = Regexp.new("[#{Regexp.quote(unsafe)}]", false) end str.gsub(unsafe) do us = $& tmp = '' us.each_byte do \|uc\| tmp << sprintf('%%%02X', uc) end tmp end.force_encoding(Encoding::US_ASCII) end # # :call-seq: # unescape( str ) # unescape( str, unsafe ) # # == Args # # +str+:: # String to remove escapes from # +unsafe+:: # Regexp to apply. Defaults to self.regexp[:ESCAPED] # # == Description # # Removes escapes from +str+ # def unescape(str, escaped = @regexp[:ESCAPED]) str.gsub(escaped) { [$&[1, 2].hex].pack('C') }.force_encoding(str.encoding) end @@to_s = Kernel.instance_method(:to_s) def inspect @@to_s.bind(self).call end private # Constructs the default Hash of patterns def initialize_pattern(opts = {}) ret = {} ret[:ESCAPED] = escaped = (opts.delete(:ESCAPED) \|\| PATTERN::ESCAPED) ret[:UNRESERVED] = unreserved = opts.delete(:UNRESERVED) \|\| PATTERN::UNRESERVED ret[:RESERVED] = reserved = opts.delete(:RESERVED) \|\| PATTERN::RESERVED ret[:DOMLABEL] = opts.delete(:DOMLABEL) \|\| PATTERN::DOMLABEL ret[:TOPLABEL] = opts.delete(:TOPLABEL) \|\| PATTERN::TOPLABEL ret[:HOSTNAME] = hostname = opts.delete(:HOSTNAME) # RFC 2396 (URI Generic Syntax) # RFC 2732 (IPv6 Literal Addresses in URL's) # RFC 2373 (IPv6 Addressing Architecture) # uric = reserved \| unreserved \| escaped ret[:URIC] = uric = "(?:[#{unreserved}#{reserved}]\|#{escaped})" # uric_no_slash = unreserved \| escaped \| ";" \| "?" \| ":" \| "@" \| # "&" \| "=" \| "+" \| "$" \| "," ret[:URIC_NO_SLASH] = uric_no_slash = "(?:[#{unreserved};?:@&=+$,]\|#{escaped})" # query = uric ret[:QUERY] = query = "#{uric}" # fragment = uric ret[:FRAGMENT] = fragment = "#{uric}" # hostname = ( domainlabel "." ) toplabel [ "." ] # reg-name = ( unreserved / pct-encoded / sub-delims ) # RFC3986 unless hostname ret[:HOSTNAME] = hostname = "(?:[a-zA-Z0-9\\-.]\|%\\h\\h)+" end # RFC 2373, APPENDIX B: # IPv6address = hexpart [ ":" IPv4address ] # IPv4address = 13DIGIT "." 13DIGIT "." 13DIGIT "." 13DIGIT # hexpart = hexseq \| hexseq "::" [ hexseq ] \| "::" [ hexseq ] # hexseq = hex4 ( ":" hex4) # hex4 = 14HEXDIG # # XXX: This definition has a flaw. "::" + IPv4address must be # allowed too. Here is a replacement. # # IPv4address = 13DIGIT "." 13DIGIT "." 13DIGIT "." 13DIGIT ret[:IPV4ADDR] = ipv4addr = "\\d{1,3}\\.\\d{1,3}\\.\\d{1,3}\\.\\d{1,3}" # hex4 = 14HEXDIG hex4 = "[#{PATTERN::HEX}]{1,4}" # lastpart = hex4 \| IPv4address lastpart = "(?:#{hex4}\|#{ipv4addr})" # hexseq1 = ( hex4 ":" ) hex4 hexseq1 = "(?:#{hex4}:)#{hex4}" # hexseq2 = ( hex4 ":" ) lastpart hexseq2 = "(?:#{hex4}:)#{lastpart}" # IPv6address = hexseq2 \| [ hexseq1 ] "::" [ hexseq2 ] ret[:IPV6ADDR] = ipv6addr = "(?:#{hexseq2}\|(?:#{hexseq1})?::(?:#{hexseq2})?)" # IPv6prefix = ( hexseq1 \| [ hexseq1 ] "::" [ hexseq1 ] ) "/" 12DIGIT # unused # ipv6reference = "[" IPv6address "]" (RFC 2732) ret[:IPV6REF] = ipv6ref = "\\[#{ipv6addr}\\]" # host = hostname \| IPv4address # host = hostname \| IPv4address \| IPv6reference (RFC 2732) ret[:HOST] = host = "(?:#{hostname}\|#{ipv4addr}\|#{ipv6ref})" # port = digit port = '\d' # hostport = host [ ":" port ] ret[:HOSTPORT] = hostport = "#{host}(?::#{port})?" # userinfo = ( unreserved \| escaped \| # ";" \| ":" \| "&" \| "=" \| "+" \| "$" \| "," ) ret[:USERINFO] = userinfo = "(?:[#{unreserved};:&=+$,]\|#{escaped})" # pchar = unreserved \| escaped \| # ":" \| "@" \| "&" \| "=" \| "+" \| "$" \| "," pchar = "(?:[#{unreserved}:@&=+$,]\|#{escaped})" # param = pchar param = "#{pchar}" # segment = pchar ( ";" param ) segment = "#{pchar}(?:;#{param})" # path_segments = segment ( "/" segment ) ret[:PATH_SEGMENTS] = path_segments = "#{segment}(?:/#{segment})" # server = [ [ userinfo "@" ] hostport ] server = "(?:#{userinfo}@)?#{hostport}" # reg_name = 1( unreserved \| escaped \| "$" \| "," \| # ";" \| ":" \| "@" \| "&" \| "=" \| "+" ) ret[:REG_NAME] = reg_name = "(?:[#{unreserved}$,;:@&=+]\|#{escaped})+" # authority = server \| reg_name authority = "(?:#{server}\|#{reg_name})" # rel_segment = 1( unreserved \| escaped \| # ";" \| "@" \| "&" \| "=" \| "+" \| "$" \| "," ) ret[:REL_SEGMENT] = rel_segment = "(?:[#{unreserved};@&=+$,]\|#{escaped})+" # scheme = alpha ( alpha \| digit \| "+" \| "-" \| "." ) ret[:SCHEME] = scheme = "[#{PATTERN::ALPHA}][\\-+.#{PATTERN::ALPHA}\\d]" # abs_path = "/" path_segments ret[:ABS_PATH] = abs_path = "/#{path_segments}" # rel_path = rel_segment [ abs_path ] ret[:REL_PATH] = rel_path = "#{rel_segment}(?:#{abs_path})?" # net_path = "//" authority [ abs_path ] ret[:NET_PATH] = net_path = "//#{authority}(?:#{abs_path})?" # hier_part = ( net_path \| abs_path ) [ "?" query ] ret[:HIER_PART] = hier_part = "(?:#{net_path}\|#{abs_path})(?:\\?(?:#{query}))?" # opaque_part = uric_no_slash uric ret[:OPAQUE_PART] = opaque_part = "#{uric_no_slash}#{uric}" # absoluteURI = scheme ":" ( hier_part \| opaque_part ) ret[:ABS_URI] = abs_uri = "#{scheme}:(?:#{hier_part}\|#{opaque_part})" # relativeURI = ( net_path \| abs_path \| rel_path ) [ "?" query ] ret[:REL_URI] = rel_uri = "(?:#{net_path}\|#{abs_path}\|#{rel_path})(?:\\?#{query})?" # URI-reference = [ absoluteURI \| relativeURI ] [ "#" fragment ] ret[:URI_REF] = "(?:#{abs_uri}\|#{rel_uri})?(?:##{fragment})?" ret[:X_ABS_URI] = " (#{scheme}): (?# 1: scheme) (?: (#{opaque_part}) (?# 2: opaque) \| (?:(?: //(?: (?:(?:(#{userinfo})@)? (?# 3: userinfo) (?:(#{host})(?::(\\d))?))? (?# 4: host, 5: port) \| (#{reg_name}) (?# 6: registry) ) \| (?!//)) (?# XXX: '//' is the mark for hostport) (#{abs_path})? (?# 7: path) )(?:\\?(#{query}))? (?# 8: query) ) (?:\\#(#{fragment}))? (?# 9: fragment) " ret[:X_REL_URI] = " (?: (?: // (?: (?:(#{userinfo})@)? (?# 1: userinfo) (#{host})?(?::(\\d))? (?# 2: host, 3: port) \| (#{reg_name}) (?# 4: registry) ) ) \| (#{rel_segment}) (?# 5: rel_segment) )? (#{abs_path})? (?# 6: abs_path) (?:\\?(#{query}))? (?# 7: query) (?:\\#(#{fragment}))? (?# 8: fragment) " ret end # Constructs the default Hash of Regexp's def initialize_regexp(pattern) ret = {} # for URI::split ret[:ABS_URI] = Regexp.new('\A\s' + pattern[:X_ABS_URI] + '\s\z', Regexp::EXTENDED) ret[:REL_URI] = Regexp.new('\A\s' + pattern[:X_REL_URI] + '\s\z', Regexp::EXTENDED) # for URI::extract ret[:URI_REF] = Regexp.new(pattern[:URI_REF]) ret[:ABS_URI_REF] = Regexp.new(pattern[:X_ABS_URI], Regexp::EXTENDED) ret[:REL_URI_REF] = Regexp.new(pattern[:X_REL_URI], Regexp::EXTENDED) # for URI::escape/unescape ret[:ESCAPED] = Regexp.new(pattern[:ESCAPED]) ret[:UNSAFE] = Regexp.new("[^#{pattern[:UNRESERVED]}#{pattern[:RESERVED]}]") # for Generic#initialize ret[:SCHEME] = Regexp.new("\\A#{pattern[:SCHEME]}\\z") ret[:USERINFO] = Regexp.new("\\A#{pattern[:USERINFO]}\\z") ret[:HOST] = Regexp.new("\\A#{pattern[:HOST]}\\z") ret[:PORT] = Regexp.new("\\A#{pattern[:PORT]}\\z") ret[:OPAQUE] = Regexp.new("\\A#{pattern[:OPAQUE_PART]}\\z") ret[:REGISTRY] = Regexp.new("\\A#{pattern[:REG_NAME]}\\z") ret[:ABS_PATH] = Regexp.new("\\A#{pattern[:ABS_PATH]}\\z") ret[:REL_PATH] = Regexp.new("\\A#{pattern[:REL_PATH]}\\z") ret[:QUERY] = Regexp.new("\\A#{pattern[:QUERY]}\\z") ret[:FRAGMENT] = Regexp.new("\\A#{pattern[:FRAGMENT]}\\z") ret end def convert_to_uri(uri) if uri.is_a?(URI::Generic) uri elsif uri = String.try_convert(uri) parse(uri) else raise ArgumentError, "bad argument (expected URI object or URI string)" end end end # class Parser # URI::Parser.new DEFAULT_PARSER = Parser.new DEFAULT_PARSER.pattern.each_pair do \|sym, str\| unless REGEXP::PATTERN.const_defined?(sym) REGEXP::PATTERN.const_set(sym, str) end end DEFAULT_PARSER.regexp.each_pair do \|sym, str\| const_set(sym, str) end module Util # :nodoc: def make_components_hash(klass, array_hash) tmp = {} if array_hash.kind_of?(Array) && array_hash.size == klass.component.size - 1 klass.component[1..-1].each_index do \|i\| begin tmp[klass.component[i + 1]] = array_hash[i].clone rescue TypeError tmp[klass.component[i + 1]] = array_hash[i] end end elsif array_hash.kind_of?(Hash) array_hash.each do \|key, value\| begin tmp[key] = value.clone rescue TypeError tmp[key] = value end end else raise ArgumentError, "expected Array of or Hash of components of #{klass.to_s} (#{klass.component[1..-1].join(', ')})" end tmp[:scheme] = klass.to_s.sub(/\A.::/, '').downcase return tmp end module_function :make_components_hash end # module for escaping unsafe characters with codes. module Escape # # == Synopsis # # URI.escape(str [, unsafe]) # # == Args # # +str+:: # String to replaces in. # +unsafe+:: # Regexp that matches all symbols that must be replaced with codes. # By default uses <tt>REGEXP::UNSAFE</tt>. # When this argument is a String, it represents a character set. # # == Description # # Escapes the string, replacing all unsafe characters with codes. # # == Usage # # require 'uri' # # enc_uri = URI.escape("http://example.com/?a=\11\15") # p enc_uri # # => "http://example.com/?a=%09%0D" # # p URI.unescape(enc_uri) # # => "http://example.com/?a=\t\r" # # p URI.escape("@?@!", "!?") # # => "@%3F@%21" # def escape(arg) warn "#{caller(1)[0]}: warning: URI.escape is obsolete" if $VERBOSE DEFAULT_PARSER.escape(arg) end alias encode escape # # == Synopsis # # URI.unescape(str) # # == Args # # +str+:: # Unescapes the string. # # == Usage # # require 'uri' # # enc_uri = URI.escape("http://example.com/?a=\11\15") # p enc_uri # # => "http://example.com/?a=%09%0D" # # p URI.unescape(enc_uri) # # => "http://example.com/?a=\t\r" # def unescape(arg) warn "#{caller(1)[0]}: warning: URI.unescape is obsolete" if $VERBOSE DEFAULT_PARSER.unescape(arg) end alias decode unescape end # module Escape extend Escape include REGEXP @@schemes = {} # Returns a Hash of the defined schemes def self.scheme_list @@schemes end # # Base class for all URI exceptions. # class Error < StandardError; end # # Not a URI. # class InvalidURIError < Error; end # # Not a URI component. # class InvalidComponentError < Error; end # # URI is valid, bad usage is not. # class BadURIError < Error; end # # == Synopsis # # URI::split(uri) # # == Args # # +uri+:: # String with URI. # # == Description # # Splits the string on following parts and returns array with result: # # * Scheme # * Userinfo # * Host # * Port # * Registry # * Path # * Opaque # * Query # * Fragment # # == Usage # # require 'uri' # # p URI.split("http://www.ruby-lang.org/") # # => ["http", nil, "www.ruby-lang.org", nil, nil, "/", nil, nil, nil] # def self.split(uri) DEFAULT_PARSER.split(uri) end # # == Synopsis # # URI::parse(uri_str) # # == Args # # +uri_str+:: # String with URI. # # == Description # # Creates one of the URI's subclasses instance from the string. # # == Raises # # URI::InvalidURIError # Raised if URI given is not a correct one. # # == Usage # # require 'uri' # # uri = URI.parse("http://www.ruby-lang.org/") # p uri # # => #<URI::HTTP:0x202281be URL:http://www.ruby-lang.org/> # p uri.scheme # # => "http" # p uri.host # # => "www.ruby-lang.org" # def self.parse(uri) DEFAULT_PARSER.parse(uri) end # # == Synopsis # # URI::join(str[, str, ...]) # # == Args # # +str+:: # String(s) to work with # # == Description # # Joins URIs. # # == Usage # # require 'uri' # # p URI.join("http://example.com/","main.rbx") # # => #<URI::HTTP:0x2022ac02 URL:http://localhost/main.rbx> # # p URI.join('http://example.com', 'foo') # # => #<URI::HTTP:0x01ab80a0 URL:http://example.com/foo> # # p URI.join('http://example.com', '/foo', '/bar') # # => #<URI::HTTP:0x01aaf0b0 URL:http://example.com/bar> # # p URI.join('http://example.com', '/foo', 'bar') # # => #<URI::HTTP:0x801a92af0 URL:http://example.com/bar> # # p URI.join('http://example.com', '/foo/', 'bar') # # => #<URI::HTTP:0x80135a3a0 URL:http://example.com/foo/bar> # # def self.join(str) DEFAULT_PARSER.join(str) end # # == Synopsis # # URI::extract(str[, schemes][,&blk]) # # == Args # # +str+:: # String to extract URIs from. # +schemes+:: # Limit URI matching to a specific schemes. # # == Description # # Extracts URIs from a string. If block given, iterates through all matched URIs. # Returns nil if block given or array with matches. # # == Usage # # require "uri" # # URI.extract("text here http://foo.example.org/bla and here mailto:test@example.com and here also.") # # => ["http://foo.example.com/bla", "mailto:test@example.com"] # def self.extract(str, schemes = nil, &block) DEFAULT_PARSER.extract(str, schemes, &block) end # # == Synopsis # # URI::regexp([match_schemes]) # # == Args # # +match_schemes+:: # Array of schemes. If given, resulting regexp matches to URIs # whose scheme is one of the match_schemes. # # == Description # Returns a Regexp object which matches to URI-like strings. # The Regexp object returned by this method includes arbitrary # number of capture group (parentheses). Never rely on it's number. # # == Usage # # require 'uri' # # # extract first URI from html_string # html_string.slice(URI.regexp) # # # remove ftp URIs # html_string.sub(URI.regexp(['ftp']) # # # You should not rely on the number of parentheses # html_string.scan(URI.regexp) do \|matches\| # p $& # end # def self.regexp(schemes = nil) DEFAULT_PARSER.make_regexp(schemes) end TBLENCWWWCOMP_ = {} # :nodoc: 256.times do \|i\| TBLENCWWWCOMP_[i.chr] = '%%%02X' % i end TBLENCWWWCOMP_[' '] = '+' TBLENCWWWCOMP_.freeze TBLDECWWWCOMP_ = {} # :nodoc: 256.times do \|i\| h, l = i>>4, i&15 TBLDECWWWCOMP_['%%%X%X' % [h, l]] = i.chr TBLDECWWWCOMP_['%%%x%X' % [h, l]] = i.chr TBLDECWWWCOMP_['%%%X%x' % [h, l]] = i.chr TBLDECWWWCOMP_['%%%x%x' % [h, l]] = i.chr end TBLDECWWWCOMP_['+'] = ' ' TBLDECWWWCOMP_.freeze HTML5ASCIIINCOMPAT = [Encoding::UTF_7, Encoding::UTF_16BE, Encoding::UTF_16LE, Encoding::UTF_32BE, Encoding::UTF_32LE] # :nodoc: # Encode given +str+ to URL-encoded form data. # # This method doesn't convert , -, ., 0-9, A-Z, _, a-z, but does convert SP # (ASCII space) to + and converts others to %XX. # # This is an implementation of # http://www.w3.org/TR/html5/association-of-controls-and-forms.html#url-encoded-form-data # # See URI.decode_www_form_component, URI.encode_www_form def self.encode_www_form_component(str) str = str.to_s if HTML5ASCIIINCOMPAT.include?(str.encoding) str = str.encode(Encoding::UTF_8) else str = str.dup end str.force_encoding(Encoding::ASCII_8BIT) str.gsub!(/[^\-.0-9A-Z_a-z]/, TBLENCWWWCOMP_) str.force_encoding(Encoding::US_ASCII) end # Decode given +str+ of URL-encoded form data. # # This decodes + to SP. # # See URI.encode_www_form_component, URI.decode_www_form def self.decode_www_form_component(str, enc=Encoding::UTF_8) raise ArgumentError, "invalid %-encoding (#{str})" unless /\A[^%](?:%\h\h[^%])\z/ =~ str str.dup.force_encoding("ASCII-8BIT") \ .gsub(/\+\|%\h\h/, TBLDECWWWCOMP_) \ .force_encoding(enc) end # Generate URL-encoded form data from given +enum+. # # This generates application/x-www-form-urlencoded data defined in HTML5 # from given an Enumerable object. # # This internally uses URI.encode_www_form_component(str). # # This method doesn't convert the encoding of given items, so convert them # before call this method if you want to send data as other than original # encoding or mixed encoding data. (Strings which are encoded in an HTML5 # ASCII incompatible encoding are converted to UTF-8.) # # This method doesn't handle files. When you send a file, use # multipart/form-data. # # This is an implementation of # http://www.w3.org/TR/html5/forms.html#url-encoded-form-data # # URI.encode_www_form([["q", "ruby"], ["lang", "en"]]) # #=> "q=ruby&lang=en" # URI.encode_www_form("q" => "ruby", "lang" => "en") # #=> "q=ruby&lang=en" # URI.encode_www_form("q" => ["ruby", "perl"], "lang" => "en") # #=> "q=ruby&q=perl&lang=en" # URI.encode_www_form([["q", "ruby"], ["q", "perl"], ["lang", "en"]]) # #=> "q=ruby&q=perl&lang=en" # # See URI.encode_www_form_component, URI.decode_www_form def self.encode_www_form(enum) enum.map do \|k,v\| if v.nil? encode_www_form_component(k) elsif v.respond_to?(:to_ary) v.to_ary.map do \|w\| str = encode_www_form_component(k) unless w.nil? str << '=' str << encode_www_form_component(w) end end.join('&') else str = encode_www_form_component(k) str << '=' str << encode_www_form_component(v) end end.join('&') end WFKV_ = '(?:[^%#=;&](?:%\h\h[^%#=;&]))' # :nodoc: # Decode URL-encoded form data from given +str+. # # This decodes application/x-www-form-urlencoded data # and returns array of key-value array. # This internally uses URI.decode_www_form_component. # # _charset_ hack is not supported now because the mapping from given charset # to Ruby's encoding is not clear yet. # see also http://www.w3.org/TR/html5/syntax.html#character-encodings-0 # # This refers http://www.w3.org/TR/html5/forms.html#url-encoded-form-data # # ary = URI.decode_www_form("a=1&a=2&b=3") # p ary #=> [['a', '1'], ['a', '2'], ['b', '3']] # p ary.assoc('a').last #=> '1' # p ary.assoc('b').last #=> '3' # p ary.rassoc('a').last #=> '2' # p Hash[ary] # => {"a"=>"2", "b"=>"3"} # # See URI.decode_www_form_component, URI.encode_www_form def self.decode_www_form(str, enc=Encoding::UTF_8) return [] if str.empty? unless /\A#{WFKV_}=#{WFKV_}(?:[;&]#{WFKV_}=#{WFKV_})\z/o =~ str raise ArgumentError, "invalid data of application/x-www-form-urlencoded (#{str})" end ary = [] $&.scan(/([^=;&]+)=([^;&]*)/) do ary << [decode_www_form_component($1, enc), decode_www_form_component($2, enc)] end ary end end # module URI module Kernel # # Returns +uri+ converted to a URI object. # def URI(uri) if uri.is_a?(URI::Generic) uri elsif uri = String.try_convert(uri) URI.parse(uri) else raise ArgumentError, "bad argument (expected URI object or URI string)" end end module_function :URI end Back

Edit File : common.rb | Size : 28.93 KB

#--
# = uri/common.rb
#
# Author:: Akira Yamada <akira@ruby-lang.org>
# Revision:: $Id: common.rb 42355 2013-08-03 13:27:01Z nagachika $
# License::
#   You can redistribute it and/or modify it under the same term as Ruby.
#
# See URI for general documentation
#

module URI
  #
  # Includes URI::REGEXP::PATTERN
  #
  module REGEXP
    #
    # Patterns used to parse URI's
    #
    module PATTERN
      # :stopdoc:

# RFC 2396 (URI Generic Syntax)
      # RFC 2732 (IPv6 Literal Addresses in URL's)
      # RFC 2373 (IPv6 Addressing Architecture)

# alpha         = lowalpha | upalpha
      ALPHA = "a-zA-Z"
      # alphanum      = alpha | digit
      ALNUM = "#{ALPHA}\\d"

# hex           = digit | "A" | "B" | "C" | "D" | "E" | "F" |
      #                         "a" | "b" | "c" | "d" | "e" | "f"
      HEX     = "a-fA-F\\d"
      # escaped       = "%" hex hex
      ESCAPED = "%[#{HEX}]{2}"
      # mark          = "-" | "_" | "." | "!" | "~" | "*" | "'" |
      #                 "(" | ")"
      # unreserved    = alphanum | mark
      UNRESERVED = "\\-_.!~*'()#{ALNUM}"
      # reserved      = ";" | "/" | "?" | ":" | "@" | "&" | "=" | "+" |
      #                 "$" | ","
      # reserved      = ";" | "/" | "?" | ":" | "@" | "&" | "=" | "+" |
      #                 "$" | "," | "[" | "]" (RFC 2732)
      RESERVED = ";/?:@&=+$,\\[\\]"

# domainlabel   = alphanum | alphanum *( alphanum | "-" ) alphanum
      DOMLABEL = "(?:[#{ALNUM}](?:[-#{ALNUM}]*[#{ALNUM}])?)"
      # toplabel      = alpha | alpha *( alphanum | "-" ) alphanum
      TOPLABEL = "(?:[#{ALPHA}](?:[-#{ALNUM}]*[#{ALNUM}])?)"
      # hostname      = *( domainlabel "." ) toplabel [ "." ]
      HOSTNAME = "(?:#{DOMLABEL}\\.)*#{TOPLABEL}\\.?"

# :startdoc:
    end # PATTERN

# :startdoc:
  end # REGEXP

# class that Parses String's into URI's
  #
  # It contains a Hash set of patterns and Regexp's that match and validate.
  #
  class Parser
    include REGEXP

#
    # == Synopsis
    #
    #   URI::Parser.new([opts])
    #
    # == Args
    #
    # The constructor accepts a hash as options for parser.
    # Keys of options are pattern names of URI components
    # and values of options are pattern strings.
    # The constructor generetes set of regexps for parsing URIs.
    #
    # You can use the following keys:
    #
    #   * :ESCAPED (URI::PATTERN::ESCAPED in default)
    #   * :UNRESERVED (URI::PATTERN::UNRESERVED in default)
    #   * :DOMLABEL (URI::PATTERN::DOMLABEL in default)
    #   * :TOPLABEL (URI::PATTERN::TOPLABEL in default)
    #   * :HOSTNAME (URI::PATTERN::HOSTNAME in default)
    #
    # == Examples
    #
    #   p = URI::Parser.new(:ESCAPED => "(?:%[a-fA-F0-9]{2}|%u[a-fA-F0-9]{4})")
    #   u = p.parse("http://example.jp/%uABCD") #=> #<URI::HTTP:0xb78cf4f8 URL:http://example.jp/%uABCD>
    #   URI.parse(u.to_s) #=> raises URI::InvalidURIError
    #
    #   s = "http://examle.com/ABCD"
    #   u1 = p.parse(s) #=> #<URI::HTTP:0xb78c3220 URL:http://example.com/ABCD>
    #   u2 = URI.parse(s) #=> #<URI::HTTP:0xb78b6d54 URL:http://example.com/ABCD>
    #   u1 == u2 #=> true
    #   u1.eql?(u2) #=> false
    #
    def initialize(opts = {})
      @pattern = initialize_pattern(opts)
      @pattern.each_value {|v| v.freeze}
      @pattern.freeze

@regexp = initialize_regexp(@pattern)
      @regexp.each_value {|v| v.freeze}
      @regexp.freeze
    end

# The Hash of patterns.
    #
    # see also URI::Parser.initialize_pattern
    attr_reader :pattern

# The Hash of Regexp
    #
    # see also URI::Parser.initialize_regexp
    attr_reader :regexp

# Returns a split URI against regexp[:ABS_URI]
    def split(uri)
      case uri
      when ''
        # null uri

when @regexp[:ABS_URI]
        scheme, opaque, userinfo, host, port,
          registry, path, query, fragment = $~[1..-1]

# URI-reference = [ absoluteURI | relativeURI ] [ "#" fragment ]

# absoluteURI   = scheme ":" ( hier_part | opaque_part )
        # hier_part     = ( net_path | abs_path ) [ "?" query ]
        # opaque_part   = uric_no_slash *uric

# abs_path      = "/"  path_segments
        # net_path      = "//" authority [ abs_path ]

# authority     = server | reg_name
        # server        = [ [ userinfo "@" ] hostport ]

if !scheme
          raise InvalidURIError,
            "bad URI(absolute but no scheme): #{uri}"
        end
        if !opaque && (!path && (!host && !registry))
          raise InvalidURIError,
            "bad URI(absolute but no path): #{uri}"
        end

when @regexp[:REL_URI]
        scheme = nil
        opaque = nil

userinfo, host, port, registry,
          rel_segment, abs_path, query, fragment = $~[1..-1]
        if rel_segment && abs_path
          path = rel_segment + abs_path
        elsif rel_segment
          path = rel_segment
        elsif abs_path
          path = abs_path
        end

# URI-reference = [ absoluteURI | relativeURI ] [ "#" fragment ]

# relativeURI   = ( net_path | abs_path | rel_path ) [ "?" query ]

# net_path      = "//" authority [ abs_path ]
        # abs_path      = "/"  path_segments
        # rel_path      = rel_segment [ abs_path ]

# authority     = server | reg_name
        # server        = [ [ userinfo "@" ] hostport ]

else
        raise InvalidURIError, "bad URI(is not URI?): #{uri}"
      end

path = '' if !path && !opaque # (see RFC2396 Section 5.2)
      ret = [
        scheme,
        userinfo, host, port,         # X
        registry,                     # X
        path,                         # Y
        opaque,                       # Y
        query,
        fragment
      ]
      return ret
    end

#
    # == Args
    #
    # +uri+::
    #    String
    #
    # == Description
    #
    # parses +uri+ and constructs either matching URI scheme object
    # (FTP, HTTP, HTTPS, LDAP, LDAPS, or MailTo) or URI::Generic
    #
    # == Usage
    #
    #   p = URI::Parser.new
    #   p.parse("ldap://ldap.example.com/dc=example?user=john")
    #   #=> #<URI::LDAP:0x00000000b9e7e8 URL:ldap://ldap.example.com/dc=example?user=john>
    #
    def parse(uri)
      scheme, userinfo, host, port,
        registry, path, opaque, query, fragment = self.split(uri)

if scheme && URI.scheme_list.include?(scheme.upcase)
        URI.scheme_list[scheme.upcase].new(scheme, userinfo, host, port,
                                           registry, path, opaque, query,
                                           fragment, self)
      else
        Generic.new(scheme, userinfo, host, port,
                    registry, path, opaque, query,
                    fragment, self)
      end
    end

#
    # == Args
    #
    # +uris+::
    #    an Array of Strings
    #
    # == Description
    #
    # Attempts to parse and merge a set of URIs
    #
    def join(*uris)
      uris[0] = convert_to_uri(uris[0])
      uris.inject :merge
    end

#
    # :call-seq:
    #   extract( str )
    #   extract( str, schemes )
    #   extract( str, schemes ) {|item| block }
    #
    # == Args
    #
    # +str+::
    #    String to search
    # +schemes+::
    #    Patterns to apply to +str+
    #
    # == Description
    #
    # Attempts to parse and merge a set of URIs
    # If no +block+ given , then returns the result,
    # else it calls +block+ for each element in result.
    #
    # see also URI::Parser.make_regexp
    #
    def extract(str, schemes = nil)
      if block_given?
        str.scan(make_regexp(schemes)) { yield $& }
        nil
      else
        result = []
        str.scan(make_regexp(schemes)) { result.push $& }
        result
      end
    end

# returns Regexp that is default self.regexp[:ABS_URI_REF],
    # unless +schemes+ is provided. Then it is a Regexp.union with self.pattern[:X_ABS_URI]
    def make_regexp(schemes = nil)
      unless schemes
        @regexp[:ABS_URI_REF]
      else
        /(?=#{Regexp.union(*schemes)}:)#{@pattern[:X_ABS_URI]}/x
      end
    end

#
    # :call-seq:
    #   escape( str )
    #   escape( str, unsafe )
    #
    # == Args
    #
    # +str+::
    #    String to make safe
    # +unsafe+::
    #    Regexp to apply. Defaults to self.regexp[:UNSAFE]
    #
    # == Description
    #
    # constructs a safe String from +str+, removing unsafe characters,
    # replacing them with codes.
    #
    def escape(str, unsafe = @regexp[:UNSAFE])
      unless unsafe.kind_of?(Regexp)
        # perhaps unsafe is String object
        unsafe = Regexp.new("[#{Regexp.quote(unsafe)}]", false)
      end
      str.gsub(unsafe) do
        us = $&
        tmp = ''
        us.each_byte do |uc|
          tmp << sprintf('%%%02X', uc)
        end
        tmp
      end.force_encoding(Encoding::US_ASCII)
    end

#
    # :call-seq:
    #   unescape( str )
    #   unescape( str, unsafe )
    #
    # == Args
    #
    # +str+::
    #    String to remove escapes from
    # +unsafe+::
    #    Regexp to apply. Defaults to self.regexp[:ESCAPED]
    #
    # == Description
    #
    # Removes escapes from +str+
    #
    def unescape(str, escaped = @regexp[:ESCAPED])
      str.gsub(escaped) { [$&[1, 2].hex].pack('C') }.force_encoding(str.encoding)
    end

@@to_s = Kernel.instance_method(:to_s)
    def inspect
      @@to_s.bind(self).call
    end

private

# Constructs the default Hash of patterns
    def initialize_pattern(opts = {})
      ret = {}
      ret[:ESCAPED] = escaped = (opts.delete(:ESCAPED) || PATTERN::ESCAPED)
      ret[:UNRESERVED] = unreserved = opts.delete(:UNRESERVED) || PATTERN::UNRESERVED
      ret[:RESERVED] = reserved = opts.delete(:RESERVED) || PATTERN::RESERVED
      ret[:DOMLABEL] = opts.delete(:DOMLABEL) || PATTERN::DOMLABEL
      ret[:TOPLABEL] = opts.delete(:TOPLABEL) || PATTERN::TOPLABEL
      ret[:HOSTNAME] = hostname = opts.delete(:HOSTNAME)

# RFC 2396 (URI Generic Syntax)
      # RFC 2732 (IPv6 Literal Addresses in URL's)
      # RFC 2373 (IPv6 Addressing Architecture)

# uric          = reserved | unreserved | escaped
      ret[:URIC] = uric = "(?:[#{unreserved}#{reserved}]|#{escaped})"
      # uric_no_slash = unreserved | escaped | ";" | "?" | ":" | "@" |
      #                 "&" | "=" | "+" | "$" | ","
      ret[:URIC_NO_SLASH] = uric_no_slash = "(?:[#{unreserved};?:@&=+$,]|#{escaped})"
      # query         = *uric
      ret[:QUERY] = query = "#{uric}*"
      # fragment      = *uric
      ret[:FRAGMENT] = fragment = "#{uric}*"

# hostname      = *( domainlabel "." ) toplabel [ "." ]
      # reg-name      = *( unreserved / pct-encoded / sub-delims ) # RFC3986
      unless hostname
        ret[:HOSTNAME] = hostname = "(?:[a-zA-Z0-9\\-.]|%\\h\\h)+"
      end

# RFC 2373, APPENDIX B:
      # IPv6address = hexpart [ ":" IPv4address ]
      # IPv4address   = 1*3DIGIT "." 1*3DIGIT "." 1*3DIGIT "." 1*3DIGIT
      # hexpart = hexseq | hexseq "::" [ hexseq ] | "::" [ hexseq ]
      # hexseq  = hex4 *( ":" hex4)
      # hex4    = 1*4HEXDIG
      #
      # XXX: This definition has a flaw. "::" + IPv4address must be
      # allowed too.  Here is a replacement.
      #
      # IPv4address = 1*3DIGIT "." 1*3DIGIT "." 1*3DIGIT "." 1*3DIGIT
      ret[:IPV4ADDR] = ipv4addr = "\\d{1,3}\\.\\d{1,3}\\.\\d{1,3}\\.\\d{1,3}"
      # hex4     = 1*4HEXDIG
      hex4 = "[#{PATTERN::HEX}]{1,4}"
      # lastpart = hex4 | IPv4address
      lastpart = "(?:#{hex4}|#{ipv4addr})"
      # hexseq1  = *( hex4 ":" ) hex4
      hexseq1 = "(?:#{hex4}:)*#{hex4}"
      # hexseq2  = *( hex4 ":" ) lastpart
      hexseq2 = "(?:#{hex4}:)*#{lastpart}"
      # IPv6address = hexseq2 | [ hexseq1 ] "::" [ hexseq2 ]
      ret[:IPV6ADDR] = ipv6addr = "(?:#{hexseq2}|(?:#{hexseq1})?::(?:#{hexseq2})?)"

# IPv6prefix  = ( hexseq1 | [ hexseq1 ] "::" [ hexseq1 ] ) "/" 1*2DIGIT
      # unused

# ipv6reference = "[" IPv6address "]" (RFC 2732)
      ret[:IPV6REF] = ipv6ref = "\\[#{ipv6addr}\\]"

# host          = hostname | IPv4address
      # host          = hostname | IPv4address | IPv6reference (RFC 2732)
      ret[:HOST] = host = "(?:#{hostname}|#{ipv4addr}|#{ipv6ref})"
      # port          = *digit
      port = '\d*'
      # hostport      = host [ ":" port ]
      ret[:HOSTPORT] = hostport = "#{host}(?::#{port})?"

# userinfo      = *( unreserved | escaped |
      #                    ";" | ":" | "&" | "=" | "+" | "$" | "," )
      ret[:USERINFO] = userinfo = "(?:[#{unreserved};:&=+$,]|#{escaped})*"

# pchar         = unreserved | escaped |
      #                 ":" | "@" | "&" | "=" | "+" | "$" | ","
      pchar = "(?:[#{unreserved}:@&=+$,]|#{escaped})"
      # param         = *pchar
      param = "#{pchar}*"
      # segment       = *pchar *( ";" param )
      segment = "#{pchar}*(?:;#{param})*"
      # path_segments = segment *( "/" segment )
      ret[:PATH_SEGMENTS] = path_segments = "#{segment}(?:/#{segment})*"

# server        = [ [ userinfo "@" ] hostport ]
      server = "(?:#{userinfo}@)?#{hostport}"
      # reg_name      = 1*( unreserved | escaped | "$" | "," |
      #                     ";" | ":" | "@" | "&" | "=" | "+" )
      ret[:REG_NAME] = reg_name = "(?:[#{unreserved}$,;:@&=+]|#{escaped})+"
      # authority     = server | reg_name
      authority = "(?:#{server}|#{reg_name})"

# rel_segment   = 1*( unreserved | escaped |
      #                     ";" | "@" | "&" | "=" | "+" | "$" | "," )
      ret[:REL_SEGMENT] = rel_segment = "(?:[#{unreserved};@&=+$,]|#{escaped})+"

# scheme        = alpha *( alpha | digit | "+" | "-" | "." )
      ret[:SCHEME] = scheme = "[#{PATTERN::ALPHA}][\\-+.#{PATTERN::ALPHA}\\d]*"

# abs_path      = "/"  path_segments
      ret[:ABS_PATH] = abs_path = "/#{path_segments}"
      # rel_path      = rel_segment [ abs_path ]
      ret[:REL_PATH] = rel_path = "#{rel_segment}(?:#{abs_path})?"
      # net_path      = "//" authority [ abs_path ]
      ret[:NET_PATH] = net_path = "//#{authority}(?:#{abs_path})?"

# hier_part     = ( net_path | abs_path ) [ "?" query ]
      ret[:HIER_PART] = hier_part = "(?:#{net_path}|#{abs_path})(?:\\?(?:#{query}))?"
      # opaque_part   = uric_no_slash *uric
      ret[:OPAQUE_PART] = opaque_part = "#{uric_no_slash}#{uric}*"

# absoluteURI   = scheme ":" ( hier_part | opaque_part )
      ret[:ABS_URI] = abs_uri = "#{scheme}:(?:#{hier_part}|#{opaque_part})"
      # relativeURI   = ( net_path | abs_path | rel_path ) [ "?" query ]
      ret[:REL_URI] = rel_uri = "(?:#{net_path}|#{abs_path}|#{rel_path})(?:\\?#{query})?"

# URI-reference = [ absoluteURI | relativeURI ] [ "#" fragment ]
      ret[:URI_REF] = "(?:#{abs_uri}|#{rel_uri})?(?:##{fragment})?"

ret[:X_ABS_URI] = "
        (#{scheme}):                           (?# 1: scheme)
        (?:
           (#{opaque_part})                    (?# 2: opaque)
        |
           (?:(?:
             //(?:
                 (?:(?:(#{userinfo})@)?        (?# 3: userinfo)
                   (?:(#{host})(?::(\\d*))?))? (?# 4: host, 5: port)
               |
                 (#{reg_name})                 (?# 6: registry)
               )
             |
             (?!//))                           (?# XXX: '//' is the mark for hostport)
             (#{abs_path})?                    (?# 7: path)
           )(?:\\?(#{query}))?                 (?# 8: query)
        )
        (?:\\#(#{fragment}))?                  (?# 9: fragment)
      "

ret[:X_REL_URI] = "
        (?:
          (?:
            //
            (?:
              (?:(#{userinfo})@)?       (?# 1: userinfo)
                (#{host})?(?::(\\d*))?  (?# 2: host, 3: port)
            |
              (#{reg_name})             (?# 4: registry)
            )
          )
        |
          (#{rel_segment})              (?# 5: rel_segment)
        )?
        (#{abs_path})?                  (?# 6: abs_path)
        (?:\\?(#{query}))?              (?# 7: query)
        (?:\\#(#{fragment}))?           (?# 8: fragment)
      "

ret
    end

# Constructs the default Hash of Regexp's
    def initialize_regexp(pattern)
      ret = {}

# for URI::split
      ret[:ABS_URI] = Regexp.new('\A\s*' + pattern[:X_ABS_URI] + '\s*\z', Regexp::EXTENDED)
      ret[:REL_URI] = Regexp.new('\A\s*' + pattern[:X_REL_URI] + '\s*\z', Regexp::EXTENDED)

# for URI::extract
      ret[:URI_REF]     = Regexp.new(pattern[:URI_REF])
      ret[:ABS_URI_REF] = Regexp.new(pattern[:X_ABS_URI], Regexp::EXTENDED)
      ret[:REL_URI_REF] = Regexp.new(pattern[:X_REL_URI], Regexp::EXTENDED)

# for URI::escape/unescape
      ret[:ESCAPED] = Regexp.new(pattern[:ESCAPED])
      ret[:UNSAFE]  = Regexp.new("[^#{pattern[:UNRESERVED]}#{pattern[:RESERVED]}]")

# for Generic#initialize
      ret[:SCHEME]   = Regexp.new("\\A#{pattern[:SCHEME]}\\z")
      ret[:USERINFO] = Regexp.new("\\A#{pattern[:USERINFO]}\\z")
      ret[:HOST]     = Regexp.new("\\A#{pattern[:HOST]}\\z")
      ret[:PORT]     = Regexp.new("\\A#{pattern[:PORT]}\\z")
      ret[:OPAQUE]   = Regexp.new("\\A#{pattern[:OPAQUE_PART]}\\z")
      ret[:REGISTRY] = Regexp.new("\\A#{pattern[:REG_NAME]}\\z")
      ret[:ABS_PATH] = Regexp.new("\\A#{pattern[:ABS_PATH]}\\z")
      ret[:REL_PATH] = Regexp.new("\\A#{pattern[:REL_PATH]}\\z")
      ret[:QUERY]    = Regexp.new("\\A#{pattern[:QUERY]}\\z")
      ret[:FRAGMENT] = Regexp.new("\\A#{pattern[:FRAGMENT]}\\z")

ret
    end

def convert_to_uri(uri)
      if uri.is_a?(URI::Generic)
        uri
      elsif uri = String.try_convert(uri)
        parse(uri)
      else
        raise ArgumentError,
          "bad argument (expected URI object or URI string)"
      end
    end

end # class Parser

# URI::Parser.new
  DEFAULT_PARSER = Parser.new
  DEFAULT_PARSER.pattern.each_pair do |sym, str|
    unless REGEXP::PATTERN.const_defined?(sym)
      REGEXP::PATTERN.const_set(sym, str)
    end
  end
  DEFAULT_PARSER.regexp.each_pair do |sym, str|
    const_set(sym, str)
  end

module Util # :nodoc:
    def make_components_hash(klass, array_hash)
      tmp = {}
      if array_hash.kind_of?(Array) &&
          array_hash.size == klass.component.size - 1
        klass.component[1..-1].each_index do |i|
          begin
            tmp[klass.component[i + 1]] = array_hash[i].clone
          rescue TypeError
            tmp[klass.component[i + 1]] = array_hash[i]
          end
        end

elsif array_hash.kind_of?(Hash)
        array_hash.each do |key, value|
          begin
            tmp[key] = value.clone
          rescue TypeError
            tmp[key] = value
          end
        end
      else
        raise ArgumentError,
          "expected Array of or Hash of components of #{klass.to_s} (#{klass.component[1..-1].join(', ')})"
      end
      tmp[:scheme] = klass.to_s.sub(/\A.*::/, '').downcase

return tmp
    end
    module_function :make_components_hash
  end

# module for escaping unsafe characters with codes.
  module Escape
    #
    # == Synopsis
    #
    #   URI.escape(str [, unsafe])
    #
    # == Args
    #
    # +str+::
    #   String to replaces in.
    # +unsafe+::
    #   Regexp that matches all symbols that must be replaced with codes.
    #   By default uses <tt>REGEXP::UNSAFE</tt>.
    #   When this argument is a String, it represents a character set.
    #
    # == Description
    #
    # Escapes the string, replacing all unsafe characters with codes.
    #
    # == Usage
    #
    #   require 'uri'
    #
    #   enc_uri = URI.escape("http://example.com/?a=\11\15")
    #   p enc_uri
    #   # => "http://example.com/?a=%09%0D"
    #
    #   p URI.unescape(enc_uri)
    #   # => "http://example.com/?a=\t\r"
    #
    #   p URI.escape("@?@!", "!?")
    #   # => "@%3F@%21"
    #
    def escape(*arg)
      warn "#{caller(1)[0]}: warning: URI.escape is obsolete" if $VERBOSE
      DEFAULT_PARSER.escape(*arg)
    end
    alias encode escape
    #
    # == Synopsis
    #
    #   URI.unescape(str)
    #
    # == Args
    #
    # +str+::
    #   Unescapes the string.
    #
    # == Usage
    #
    #   require 'uri'
    #
    #   enc_uri = URI.escape("http://example.com/?a=\11\15")
    #   p enc_uri
    #   # => "http://example.com/?a=%09%0D"
    #
    #   p URI.unescape(enc_uri)
    #   # => "http://example.com/?a=\t\r"
    #
    def unescape(*arg)
      warn "#{caller(1)[0]}: warning: URI.unescape is obsolete" if $VERBOSE
      DEFAULT_PARSER.unescape(*arg)
    end
    alias decode unescape
  end # module Escape

extend Escape
  include REGEXP

@@schemes = {}
  # Returns a Hash of the defined schemes
  def self.scheme_list
    @@schemes
  end

#
  # Base class for all URI exceptions.
  #
  class Error < StandardError; end
  #
  # Not a URI.
  #
  class InvalidURIError < Error; end
  #
  # Not a URI component.
  #
  class InvalidComponentError < Error; end
  #
  # URI is valid, bad usage is not.
  #
  class BadURIError < Error; end

#
  # == Synopsis
  #
  #   URI::split(uri)
  #
  # == Args
  #
  # +uri+::
  #   String with URI.
  #
  # == Description
  #
  # Splits the string on following parts and returns array with result:
  #
  #   * Scheme
  #   * Userinfo
  #   * Host
  #   * Port
  #   * Registry
  #   * Path
  #   * Opaque
  #   * Query
  #   * Fragment
  #
  # == Usage
  #
  #   require 'uri'
  #
  #   p URI.split("http://www.ruby-lang.org/")
  #   # => ["http", nil, "www.ruby-lang.org", nil, nil, "/", nil, nil, nil]
  #
  def self.split(uri)
    DEFAULT_PARSER.split(uri)
  end

#
  # == Synopsis
  #
  #   URI::parse(uri_str)
  #
  # == Args
  #
  # +uri_str+::
  #   String with URI.
  #
  # == Description
  #
  # Creates one of the URI's subclasses instance from the string.
  #
  # == Raises
  #
  # URI::InvalidURIError
  #   Raised if URI given is not a correct one.
  #
  # == Usage
  #
  #   require 'uri'
  #
  #   uri = URI.parse("http://www.ruby-lang.org/")
  #   p uri
  #   # => #<URI::HTTP:0x202281be URL:http://www.ruby-lang.org/>
  #   p uri.scheme
  #   # => "http"
  #   p uri.host
  #   # => "www.ruby-lang.org"
  #
  def self.parse(uri)
    DEFAULT_PARSER.parse(uri)
  end

#
  # == Synopsis
  #
  #   URI::join(str[, str, ...])
  #
  # == Args
  #
  # +str+::
  #   String(s) to work with
  #
  # == Description
  #
  # Joins URIs.
  #
  # == Usage
  #
  #   require 'uri'
  #
  #   p URI.join("http://example.com/","main.rbx")
  #   # => #<URI::HTTP:0x2022ac02 URL:http://localhost/main.rbx>
  #
  #   p URI.join('http://example.com', 'foo')
  #   # => #<URI::HTTP:0x01ab80a0 URL:http://example.com/foo>
  #
  #   p URI.join('http://example.com', '/foo', '/bar')
  #   # => #<URI::HTTP:0x01aaf0b0 URL:http://example.com/bar>
  #
  #   p URI.join('http://example.com', '/foo', 'bar')
  #   # => #<URI::HTTP:0x801a92af0 URL:http://example.com/bar>
  #
  #   p URI.join('http://example.com', '/foo/', 'bar')
  #   # => #<URI::HTTP:0x80135a3a0 URL:http://example.com/foo/bar>
  #
  #
  def self.join(*str)
    DEFAULT_PARSER.join(*str)
  end

#
  # == Synopsis
  #
  #   URI::extract(str[, schemes][,&blk])
  #
  # == Args
  #
  # +str+::
  #   String to extract URIs from.
  # +schemes+::
  #   Limit URI matching to a specific schemes.
  #
  # == Description
  #
  # Extracts URIs from a string. If block given, iterates through all matched URIs.
  # Returns nil if block given or array with matches.
  #
  # == Usage
  #
  #   require "uri"
  #
  #   URI.extract("text here http://foo.example.org/bla and here mailto:test@example.com and here also.")
  #   # => ["http://foo.example.com/bla", "mailto:test@example.com"]
  #
  def self.extract(str, schemes = nil, &block)
    DEFAULT_PARSER.extract(str, schemes, &block)
  end

#
  # == Synopsis
  #
  #   URI::regexp([match_schemes])
  #
  # == Args
  #
  # +match_schemes+::
  #   Array of schemes. If given, resulting regexp matches to URIs
  #   whose scheme is one of the match_schemes.
  #
  # == Description
  # Returns a Regexp object which matches to URI-like strings.
  # The Regexp object returned by this method includes arbitrary
  # number of capture group (parentheses).  Never rely on it's number.
  #
  # == Usage
  #
  #   require 'uri'
  #
  #   # extract first URI from html_string
  #   html_string.slice(URI.regexp)
  #
  #   # remove ftp URIs
  #   html_string.sub(URI.regexp(['ftp'])
  #
  #   # You should not rely on the number of parentheses
  #   html_string.scan(URI.regexp) do |*matches|
  #     p $&
  #   end
  #
  def self.regexp(schemes = nil)
    DEFAULT_PARSER.make_regexp(schemes)
  end

TBLENCWWWCOMP_ = {} # :nodoc:
  256.times do |i|
    TBLENCWWWCOMP_[i.chr] = '%%%02X' % i
  end
  TBLENCWWWCOMP_[' '] = '+'
  TBLENCWWWCOMP_.freeze
  TBLDECWWWCOMP_ = {} # :nodoc:
  256.times do |i|
    h, l = i>>4, i&15
    TBLDECWWWCOMP_['%%%X%X' % [h, l]] = i.chr
    TBLDECWWWCOMP_['%%%x%X' % [h, l]] = i.chr
    TBLDECWWWCOMP_['%%%X%x' % [h, l]] = i.chr
    TBLDECWWWCOMP_['%%%x%x' % [h, l]] = i.chr
  end
  TBLDECWWWCOMP_['+'] = ' '
  TBLDECWWWCOMP_.freeze

HTML5ASCIIINCOMPAT = [Encoding::UTF_7, Encoding::UTF_16BE, Encoding::UTF_16LE,
    Encoding::UTF_32BE, Encoding::UTF_32LE] # :nodoc:

# Encode given +str+ to URL-encoded form data.
  #
  # This method doesn't convert *, -, ., 0-9, A-Z, _, a-z, but does convert SP
  # (ASCII space) to + and converts others to %XX.
  #
  # This is an implementation of
  # http://www.w3.org/TR/html5/association-of-controls-and-forms.html#url-encoded-form-data
  #
  # See URI.decode_www_form_component, URI.encode_www_form
  def self.encode_www_form_component(str)
    str = str.to_s
    if HTML5ASCIIINCOMPAT.include?(str.encoding)
      str = str.encode(Encoding::UTF_8)
    else
      str = str.dup
    end
    str.force_encoding(Encoding::ASCII_8BIT)
    str.gsub!(/[^*\-.0-9A-Z_a-z]/, TBLENCWWWCOMP_)
    str.force_encoding(Encoding::US_ASCII)
  end

# Decode given +str+ of URL-encoded form data.
  #
  # This decodes + to SP.
  #
  # See URI.encode_www_form_component, URI.decode_www_form
  def self.decode_www_form_component(str, enc=Encoding::UTF_8)
    raise ArgumentError, "invalid %-encoding (#{str})" unless /\A[^%]*(?:%\h\h[^%]*)*\z/ =~ str
    str.dup.force_encoding("ASCII-8BIT") \
       .gsub(/\+|%\h\h/, TBLDECWWWCOMP_) \
       .force_encoding(enc)
  end

# Generate URL-encoded form data from given +enum+.
  #
  # This generates application/x-www-form-urlencoded data defined in HTML5
  # from given an Enumerable object.
  #
  # This internally uses URI.encode_www_form_component(str).
  #
  # This method doesn't convert the encoding of given items, so convert them
  # before call this method if you want to send data as other than original
  # encoding or mixed encoding data. (Strings which are encoded in an HTML5
  # ASCII incompatible encoding are converted to UTF-8.)
  #
  # This method doesn't handle files.  When you send a file, use
  # multipart/form-data.
  #
  # This is an implementation of
  # http://www.w3.org/TR/html5/forms.html#url-encoded-form-data
  #
  #    URI.encode_www_form([["q", "ruby"], ["lang", "en"]])
  #    #=> "q=ruby&lang=en"
  #    URI.encode_www_form("q" => "ruby", "lang" => "en")
  #    #=> "q=ruby&lang=en"
  #    URI.encode_www_form("q" => ["ruby", "perl"], "lang" => "en")
  #    #=> "q=ruby&q=perl&lang=en"
  #    URI.encode_www_form([["q", "ruby"], ["q", "perl"], ["lang", "en"]])
  #    #=> "q=ruby&q=perl&lang=en"
  #
  # See URI.encode_www_form_component, URI.decode_www_form
  def self.encode_www_form(enum)
    enum.map do |k,v|
      if v.nil?
        encode_www_form_component(k)
      elsif v.respond_to?(:to_ary)
        v.to_ary.map do |w|
          str = encode_www_form_component(k)
          unless w.nil?
            str << '='
            str << encode_www_form_component(w)
          end
        end.join('&')
      else
        str = encode_www_form_component(k)
        str << '='
        str << encode_www_form_component(v)
      end
    end.join('&')
  end

WFKV_ = '(?:[^%#=;&]*(?:%\h\h[^%#=;&]*)*)' # :nodoc:

# Decode URL-encoded form data from given +str+.
  #
  # This decodes application/x-www-form-urlencoded data
  # and returns array of key-value array.
  # This internally uses URI.decode_www_form_component.
  #
  # _charset_ hack is not supported now because the mapping from given charset
  # to Ruby's encoding is not clear yet.
  # see also http://www.w3.org/TR/html5/syntax.html#character-encodings-0
  #
  # This refers http://www.w3.org/TR/html5/forms.html#url-encoded-form-data
  #
  # ary = URI.decode_www_form("a=1&a=2&b=3")
  # p ary                  #=> [['a', '1'], ['a', '2'], ['b', '3']]
  # p ary.assoc('a').last  #=> '1'
  # p ary.assoc('b').last  #=> '3'
  # p ary.rassoc('a').last #=> '2'
  # p Hash[ary]            # => {"a"=>"2", "b"=>"3"}
  #
  # See URI.decode_www_form_component, URI.encode_www_form
  def self.decode_www_form(str, enc=Encoding::UTF_8)
    return [] if str.empty?
    unless /\A#{WFKV_}=#{WFKV_}(?:[;&]#{WFKV_}=#{WFKV_})*\z/o =~ str
      raise ArgumentError, "invalid data of application/x-www-form-urlencoded (#{str})"
    end
    ary = []
    $&.scan(/([^=;&]+)=([^;&]*)/) do
      ary << [decode_www_form_component($1, enc), decode_www_form_component($2, enc)]
    end
    ary
  end
end # module URI

module Kernel

#
  # Returns +uri+ converted to a URI object.
  #
  def URI(uri)
    if uri.is_a?(URI::Generic)
      uri
    elsif uri = String.try_convert(uri)
      URI.parse(uri)
    else
      raise ArgumentError,
        "bad argument (expected URI object or URI string)"
    end
  end
  module_function :URI
end

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