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URI::RFC2396_Parser

Class that parses String's into URI's.

It contains a Hash set of patterns and Regexp's that match and validate.

Attributes

pattern[R]

The Hash of patterns.

See also URI::Parser.initialize_pattern.

regexp[R]

The Hash of Regexp.

See also URI::Parser.initialize_regexp.

Public Class Methods

new(opts = {}) click to toggle source

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 generates 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 http://example.jp/%uABCD>
URI.parse(u.to_s) #=> raises URI::InvalidURIError

s = "http://example.com/ABCD"
u1 = p.parse(s) #=> #<URI::HTTP http://example.com/ABCD>
u2 = URI.parse(s) #=> #<URI::HTTP http://example.com/ABCD>
u1 == u2 #=> true
u1.eql?(u2) #=> false

 
               # File ruby-3.1.2/lib/uri/rfc2396_parser.rb, line 99
def initialize(opts = {})
  @pattern = initialize_pattern(opts)
  @pattern.each_value(&:freeze)
  @pattern.freeze

  @regexp = initialize_regexp(@pattern)
  @regexp.each_value(&:freeze)
  @regexp.freeze
end

Public Instance Methods

escape( str ) click to toggle source
escape( str, unsafe )

Args ↑

str

String to make safe

unsafe

Regexp to apply. Defaults to +self.regexp+

Description ↑

Constructs a safe String from str, removing unsafe characters, replacing them with codes.

 
               # File ruby-3.1.2/lib/uri/rfc2396_parser.rb, line 287
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
extract( str ) click to toggle source
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.

 
               # File ruby-3.1.2/lib/uri/rfc2396_parser.rb, line 249
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
inspect() click to toggle source 
 
               # File ruby-3.1.2/lib/uri/rfc2396_parser.rb, line 326
def inspect
  @@to_s.bind_call(self)
end
join(*uris) click to toggle source

Args ↑

uris

an Array of Strings

Description ↑

Attempts to parse and merge a set of URIs.

 
               # File ruby-3.1.2/lib/uri/rfc2396_parser.rb, line 223
def join(*uris)
  uris[0] = convert_to_uri(uris[0])
  uris.inject :merge
end
make_regexp(schemes = nil) click to toggle source

Returns Regexp that is default +self.regexp+, unless schemes is provided. Then it is a Regexp.union with +self.pattern+.

 
               # File ruby-3.1.2/lib/uri/rfc2396_parser.rb, line 262
def make_regexp(schemes = nil)
  unless schemes
    @regexp[:ABS_URI_REF]
  else
    /(?=#{Regexp.union(*schemes)}:)#{@pattern[:X_ABS_URI]}/x
  end
end
parse(uri) click to toggle source

Args ↑

uri

String

Description ↑

Parses uri and constructs either matching URI scheme object (File, 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 ldap://ldap.example.com/dc=example?user=john>

 
               # File ruby-3.1.2/lib/uri/rfc2396_parser.rb, line 209
def parse(uri)
  URI.for(*self.split(uri), self)
end
split(uri) click to toggle source

Returns a split URI against +regexp+.

 
               # File ruby-3.1.2/lib/uri/rfc2396_parser.rb, line 120
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
unescape( str ) click to toggle source
unescape( str, escaped )

Args ↑

str

String to remove escapes from

escaped

Regexp to apply. Defaults to +self.regexp+

Description ↑

Removes escapes from str.

 
               # File ruby-3.1.2/lib/uri/rfc2396_parser.rb, line 318
def unescape(str, escaped = @regexp[:ESCAPED])
  enc = str.encoding
  enc = Encoding::UTF_8 if enc == Encoding::US_ASCII
  str.gsub(escaped) { [$&[1, 2]].pack('H2').force_encoding(enc) }
end

Private Instance Methods

convert_to_uri(uri) click to toggle source 
 
               # File ruby-3.1.2/lib/uri/rfc2396_parser.rb, line 527
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
initialize_pattern(opts = {}) click to toggle source

Constructs the default Hash of patterns.

 
               # File ruby-3.1.2/lib/uri/rfc2396_parser.rb, line 338
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
  ret[:PORT] = 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
initialize_regexp(pattern) click to toggle source

Constructs the default Hash of Regexp's.

 
               # File ruby-3.1.2/lib/uri/rfc2396_parser.rb, line 496
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