Class: Gem::URI::RFC2396_Parser

Inherits:
Object
  • Object
show all
Includes:
RFC2396_REGEXP
Defined in:
lib/rubygems/vendor/uri/lib/uri/rfc2396_parser.rb

Overview

Class that parses String’s into Gem::URI’s.

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

Constant Summary collapse

@@to_s = 
Kernel.instance_method(:to_s)

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(opts = {}) ⇒ RFC2396_Parser

Synopsis

Gem::URI::Parser.new([opts])

Args

The constructor accepts a hash as options for parser. Keys of options are pattern names of Gem::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 (Gem::URI::PATTERN::ESCAPED in default)
* :UNRESERVED (Gem::URI::PATTERN::UNRESERVED in default)
* :DOMLABEL (Gem::URI::PATTERN::DOMLABEL in default)
* :TOPLABEL (Gem::URI::PATTERN::TOPLABEL in default)
* :HOSTNAME (Gem::URI::PATTERN::HOSTNAME in default)

Examples

p = Gem::URI::Parser.new(:ESCAPED => "(?:%[a-fA-F0-9]{2}|%u[a-fA-F0-9]{4})")
u = p.parse("http://example.jp/%uABCD") #=> #<Gem::URI::HTTP http://example.jp/%uABCD>
Gem::URI.parse(u.to_s) #=> raises Gem::URI::InvalidURIError

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



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# File 'lib/rubygems/vendor/uri/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

Instance Attribute Details

#pattern ⇒ Object (readonly)

The Hash of patterns.

See also Gem::URI::Parser.initialize_pattern.



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# File 'lib/rubygems/vendor/uri/lib/uri/rfc2396_parser.rb', line 112

def pattern
  @pattern
end

#regexp ⇒ Object (readonly)

The Hash of Regexp.

See also Gem::URI::Parser.initialize_regexp.



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# File 'lib/rubygems/vendor/uri/lib/uri/rfc2396_parser.rb', line 117

def regexp
  @regexp
end

Instance Method Details

#escape(str, unsafe = ) ⇒ Object

: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.



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# File 'lib/rubygems/vendor/uri/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, schemes = nil) ⇒ Object

: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 Gem::URI::Parser.make_regexp.



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# File 'lib/rubygems/vendor/uri/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 ⇒ Object 



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# File 'lib/rubygems/vendor/uri/lib/uri/rfc2396_parser.rb', line 326

def inspect
  @@to_s.bind_call(self)
end

#join(*uris) ⇒ Object

Args

uris

an Array of Strings

Description

Attempts to parse and merge a set of URIs.



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# File 'lib/rubygems/vendor/uri/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) ⇒ Object

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].



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# File 'lib/rubygems/vendor/uri/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) ⇒ Object

Args

uri

String

Description

Parses uri and constructs either matching Gem::URI scheme object (File, FTP, HTTP, HTTPS, LDAP, LDAPS, or MailTo) or Gem::URI::Generic.

Usage

p = Gem::URI::Parser.new
p.parse("ldap://ldap.example.com/dc=example?user=john")
#=> #<Gem::URI::LDAP ldap://ldap.example.com/dc=example?user=john>



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# File 'lib/rubygems/vendor/uri/lib/uri/rfc2396_parser.rb', line 209

def parse(uri)
  Gem::URI.for(*self.split(uri), self)
end

#split(uri) ⇒ Object

Returns a split Gem::URI against regexp[:ABS_URI].



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# File 'lib/rubygems/vendor/uri/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]

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

    # Gem::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 Gem::URI(is not Gem::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, escaped = ) ⇒ Object

:call-seq:

unescape( str )
unescape( str, escaped )

Args

str

String to remove escapes from

escaped

Regexp to apply. Defaults to self.regexp[:ESCAPED]

Description

Removes escapes from str.



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# File 'lib/rubygems/vendor/uri/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