#
# $Id: common.rb,v 1.1.1.1 2002/05/27 17:59:49 jkh Exp $
#
# Copyright (c) 2001 akira yamada <akira@ruby-lang.org>
# You can redistribute it and/or modify it under the same term as Ruby.
#
=begin
== URI
=end
module URI
module REGEXP
module PATTERN
# 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 = ";/?:@&=+$,\\[\\]"
# uric = reserved | unreserved | escaped
URIC = "(?:[#{UNRESERVED}#{RESERVED}]|#{ESCAPED})"
# uric_no_slash = unreserved | escaped | ";" | "?" | ":" | "@" |
# "&" | "=" | "+" | "$" | ","
URIC_NO_SLASH = "(?:[#{UNRESERVED};?:@&=+$,]|#{ESCAPED})"
# query = *uric
QUERY = "#{URIC}*"
# fragment = *uric
FRAGMENT = "#{URIC}*"
# domainlabel = alphanum | alphanum *( alphanum | "-" ) alphanum
DOMLABEL = "(?:[#{ALNUM}](?:[-#{ALNUM}]*[#{ALNUM}])?)"
# toplabel = alpha | alpha *( alphanum | "-" ) alphanum
TOPLABEL = "(?:[#{ALPHA}](?:[-#{ALNUM}]*[#{ALNUM}])?)"
# hostname = *( domainlabel "." ) toplabel [ "." ]
HOSTNAME = "(?:#{DOMLABEL}\\.)*#{TOPLABEL}\\.?"
# RFC 2373, APPENDIX B:
# IPv6address = hexpart [ ":" IPv4address ]
# IPv4address = 1*3DIGIT "." 1*3DIGIT "." 1*3DIGIT "." 1*3DIGIT
# hexpart = hexseq | hexseq "::" [ hexseq ] | "::" [ hexseq ]
# hexseq = hex4 *( ":" hex4)
# hex4 = 1*4HEXDIG
#
# XXX: This definition has a flaw. "::" + IPv4address must be
# allowed too. Here is a replacement.
#
# IPv4address = 1*3DIGIT "." 1*3DIGIT "." 1*3DIGIT "." 1*3DIGIT
IPV4ADDR = "\\d{1,3}\\.\\d{1,3}\\.\\d{1,3}\\.\\d{1,3}"
# hex4 = 1*4HEXDIG
HEX4 = "[#{HEX}]{1,4}"
# lastpart = hex4 | IPv4address
LASTPART = "(?:#{HEX4}|#{IPV4ADDR})"
# hexseq1 = *( hex4 ":" ) hex4
HEXSEQ1 = "(?:#{HEX4}:)*#{HEX4}"
# hexseq2 = *( hex4 ":" ) lastpart
HEXSEQ2 = "(?:#{HEX4}:)*#{LASTPART}"
# IPv6address = hexseq2 | [ hexseq1 ] "::" [ hexseq2 ]
IPV6ADDR = "(?:#{HEXSEQ2}|(?:#{HEXSEQ1})?::(?:#{HEXSEQ2})?)"
# IPv6prefix = ( hexseq1 | [ hexseq1 ] "::" [ hexseq1 ] ) "/" 1*2DIGIT
# unused
# ipv6reference = "[" IPv6address "]" (RFC 2732)
IPV6REF = "\\[#{IPV6ADDR}\\]"
# host = hostname | IPv4address
# host = hostname | IPv4address | IPv6reference (RFC 2732)
HOST = "(?:#{HOSTNAME}|#{IPV4ADDR}|#{IPV6REF})"
# port = *digit
PORT = "\d*"
# hostport = host [ ":" port ]
HOSTPORT = "#{HOST}(?:#{PORT})?"
# userinfo = *( unreserved | escaped |
# ";" | ":" | "&" | "=" | "+" | "$" | "," )
USERINFO = "(?:[#{UNRESERVED};:&=+$,]|#{ESCAPED})*"
# pchar = unreserved | escaped |
# ":" | "@" | "&" | "=" | "+" | "$" | ","
PCHAR = "(?:[#{UNRESERVED}:@&=+$,]|#{ESCAPED})"
# param = *pchar
PARAM = "#{PCHAR}*"
# segment = *pchar *( ";" param )
SEGMENT = "#{PCHAR}*(?:;#{PARAM})*"
# path_segments = segment *( "/" segment )
PATH_SEGMENTS = "#{SEGMENT}(?:/#{SEGMENT})*"
# server = [ [ userinfo "@" ] hostport ]
SERVER = "(?:#{USERINFO}@)?#{HOSTPORT}"
# reg_name = 1*( unreserved | escaped | "$" | "," |
# ";" | ":" | "@" | "&" | "=" | "+" )
REG_NAME = "(?:[#{UNRESERVED}$,;+@&=+]|#{ESCAPED})+"
# authority = server | reg_name
AUTHORITY = "(?:#{SERVER}|#{REG_NAME})"
# rel_segment = 1*( unreserved | escaped |
# ";" | "@" | "&" | "=" | "+" | "$" | "," )
REL_SEGMENT = "(?:[#{UNRESERVED};@&=+$,]|#{ESCAPED})+"
# scheme = alpha *( alpha | digit | "+" | "-" | "." )
SCHEME = "[#{ALPHA}][-+.#{ALPHA}\\d]*"
# abs_path = "/" path_segments
ABS_PATH = "/#{PATH_SEGMENTS}"
# rel_path = rel_segment [ abs_path ]
REL_PATH = "#{REL_SEGMENT}(?:#{ABS_PATH})?"
# net_path = "//" authority [ abs_path ]
NET_PATH = "//#{AUTHORITY}(?:#{ABS_PATH})?"
# hier_part = ( net_path | abs_path ) [ "?" query ]
HIER_PART = "(?:#{NET_PATH}|#{ABS_PATH})(?:\\?(?:#{QUERY}))?"
# opaque_part = uric_no_slash *uric
OPAQUE_PART = "#{URIC_NO_SLASH}#{URIC}*"
# absoluteURI = scheme ":" ( hier_part | opaque_part )
ABS_URI = "#{SCHEME}:(?:#{HIER_PART}|#{OPAQUE_PART})"
# relativeURI = ( net_path | abs_path | rel_path ) [ "?" query ]
REL_URI = "(?:#{NET_PATH}|#{ABS_PATH}|#{REL_PATH})(?:\\?#{QUERY})?"
# URI-reference = [ absoluteURI | relativeURI ] [ "#" fragment ]
URI_REF = "(?:#{ABS_URI}|#{REL_URI})?(?:##{FRAGMENT})?"
# XXX:
X_ABS_URI = "
(#{PATTERN::SCHEME}): (?# 1: scheme)
(?:
(?:
//(?:
(?:(?:(#{PATTERN::USERINFO})@)? (?# 2: userinfo)
(?:(#{PATTERN::HOST})(?::(\\d*))?))?(?# 3: host, 4: port)
|
(#{PATTERN::REG_NAME}) (?# 5: registry)
)
(#{PATTERN::ABS_PATH})? (?# 6: path)
)(?:\\?(#{PATTERN::QUERY}))? (?# 7: query)
|
(#{PATTERN::OPAQUE_PART}) (?# 8: opaque)
)
(?:\\#(#{PATTERN::FRAGMENT}))? (?# 9: fragment)
"
X_REL_URI = "
(?:
(?:
//
(?:
(?:(#{PATTERN::USERINFO})@)? (?# 1: userinfo)
(#{PATTERN::HOST})?(?::(\\d*))? (?# 2: host, 3: port)
|
(#{PATTERN::REG_NAME}) (?# 4: registry)
)
)
|
(#{PATTERN::REL_SEGMENT}) (?# 5: rel_segment)
)?
(#{PATTERN::ABS_PATH})? (?# 6: abs_path)
(?:\\?(#{PATTERN::QUERY}))? (?# 7: query)
(?:\\#(#{PATTERN::FRAGMENT}))? (?# 8: fragment)
"
end # PATTERN
# for URI::split
ABS_URI = Regexp.new('^' + PATTERN::X_ABS_URI + '$', #'
Regexp::EXTENDED, 'N').freeze
REL_URI = Regexp.new('^' + PATTERN::X_REL_URI + '$', #'
Regexp::EXTENDED, 'N').freeze
# for URI::extract
URI_REF = Regexp.new(PATTERN::URI_REF, false, 'N').freeze
ABS_URI_REF = Regexp.new(PATTERN::X_ABS_URI, Regexp::EXTENDED, 'N').freeze
REL_URI_REF = Regexp.new(PATTERN::X_REL_URI, Regexp::EXTENDED, 'N').freeze
# for URI::escape/unescape
ESCAPED = Regexp.new(PATTERN::ESCAPED, false, 'N').freeze
UNSAFE = Regexp.new("[^#{PATTERN::UNRESERVED}#{PATTERN::RESERVED}]",
false, 'N').freeze
# for Generic#initialize
SCHEME = Regexp.new("^#{PATTERN::SCHEME}$", false, 'N').freeze #"
USERINFO = Regexp.new("^#{PATTERN::USERINFO}$", false, 'N').freeze #"
HOST = Regexp.new("^#{PATTERN::HOST}$", false, 'N').freeze #"
PORT = Regexp.new("^#{PATTERN::PORT}$", false, 'N').freeze #"
OPAQUE = Regexp.new("^#{PATTERN::OPAQUE_PART}$", false, 'N').freeze #"
REGISTRY = Regexp.new("^#{PATTERN::REG_NAME}$", false, 'N').freeze #"
ABS_PATH = Regexp.new("^#{PATTERN::ABS_PATH}$", false, 'N').freeze #"
REL_PATH = Regexp.new("^#{PATTERN::REL_PATH}$", false, 'N').freeze #"
QUERY = Regexp.new("^#{PATTERN::QUERY}$", false, 'N').freeze #"
FRAGMENT = Regexp.new("^#{PATTERN::FRAGMENT}$", false, 'N').freeze #"
end # REGEXP
module Util
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 compornents 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 Escape
include REGEXP
def escape(str, unsafe = UNSAFE)
unless unsafe.kind_of?(Regexp)
# perhaps unsafe is String object
unsafe = Regexp.new(Regexp.quote(unsafe), false, 'N')
end
str.gsub(unsafe) do |us|
tmp = ''
us.each_byte do |uc|
tmp << sprintf('%%%02X', uc)
end
tmp
end
end
alias encode escape
def unescape(str)
str.gsub(ESCAPED) do
$&[1,2].hex.chr
end
end
alias decode unescape
end
include REGEXP
extend Escape
@@schemes = {}
class Error < StandardError; end
class InvalidURIError < Error; end # it is not URI.
class InvalidComponentError < Error; end # it is not component of URI.
class BadURIError < Error; end # the URI is valid but it is bad for the position.
=begin
=== Methods
--- URI::split(uri)
=end
def self.split(uri)
case uri
when ''
# null uri
when ABS_URI
scheme, userinfo, host, port,
registry, path, query, opaque, 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 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
=begin
--- URI::parse(uri_str)
=end
def self.parse(uri)
scheme, userinfo, host, port,
registry, path, opaque, query, fragment = self.split(uri)
if scheme && @@schemes.include?(scheme.upcase)
@@schemes[scheme.upcase].new(scheme, userinfo, host, port,
registry, path, opaque, query,
fragment)
else
Generic.new(scheme, userinfo, host, port,
registry, path, opaque, query,
fragment)
end
end
=begin
--- URI::join(str[, str, ...])
=end
def self.join(*str)
u = self.parse(str[0])
str[1 .. -1].each do |x|
u = u.merge(x)
end
u
end
=begin
--- URI::extract(str[, schemes])
=end
def self.extract(str, schemes = [])
urls = []
if schemes.size > 0
tmp = Regexp.new('(?:' + schemes.collect{|s|
Regexp.quote(s + ':')
}.join('|') + ')',
Regexp::IGNORECASE, 'N')
str.scan(tmp) {
tmp_str = $& + $'
if ABS_URI_REF =~ tmp_str
if block_given?
yield($&)
else
urls << $&
end
end
}
else
str.scan(ABS_URI_REF) {
if block_given?
yield($&)
else
urls << $&
end
}
end
if block_given?
return nil
else
return urls
end
end
end # URI