module URI

Included modules:
URI::REGEXP

URI is a module providing classes to handle Uniform Resource Identifiers (RFC2396).

Features

  • Uniform way of handling URIs.

  • Flexibility to introduce custom URI schemes.

  • Flexibility to have an alternate URI::Parser (or just different patterns and regexp's).

Basic example

require 'uri'

uri = URI("http://foo.com/posts?id=30&limit=5#time=1305298413")
#=> #<URI::HTTP http://foo.com/posts?id=30&limit=5#time=1305298413>

uri.scheme    #=> "http"
uri.host      #=> "foo.com"
uri.path      #=> "/posts"
uri.query     #=> "id=30&limit=5"
uri.fragment  #=> "time=1305298413"

uri.to_s      #=> "http://foo.com/posts?id=30&limit=5#time=1305298413"

Adding custom URIs

module URI
  class RSYNC < Generic
    DEFAULT_PORT = 873
  end
  @@schemes['RSYNC'] = RSYNC
end
#=> URI::RSYNC

URI.scheme_list
#=> {"FILE"=>URI::File, "FTP"=>URI::FTP, "HTTP"=>URI::HTTP,
#    "HTTPS"=>URI::HTTPS, "LDAP"=>URI::LDAP, "LDAPS"=>URI::LDAPS,
#    "MAILTO"=>URI::MailTo, "RSYNC"=>URI::RSYNC}

uri = URI("rsync://rsync.foo.com")
#=> #<URI::RSYNC rsync://rsync.foo.com>

RFC References

A good place to view an RFC spec is www.ietf.org/rfc.html.

Here is a list of all related RFC's:

Class tree

Copyright Info

Author

Akira Yamada <[email protected]>

Documentation

Akira Yamada <[email protected]> Dmitry V. Sabanin <[email protected]> Vincent Batts <[email protected]>

License

Copyright © 2001 akira yamada <[email protected]> You can redistribute it and/or modify it under the same term as Ruby.

Constants

DEFAULT_PARSER

URI::Parser.new

Parser
REGEXP
RFC3986_PARSER

Public Class Methods

decode_www_form(str, enc=Encoding::UTF_8, separator: '&', use__charset_: false, isindex: false) Show source
# File lib/uri/common.rb, line 391
def self.decode_www_form(str, enc=Encoding::UTF_8, separator: '&', use__charset_: false, isindex: false)
  raise ArgumentError, "the input of #{self.name}.#{__method__} must be ASCII only string" unless str.ascii_only?
  ary = []
  return ary if str.empty?
  enc = Encoding.find(enc)
  str.b.each_line(separator) do |string|
    string.chomp!(separator)
    key, sep, val = string.partition('=')
    if isindex
      if sep.empty?
        val = key
        key = +''
      end
      isindex = false
    end

    if use__charset_ and key == '_charset_' and e = get_encoding(val)
      enc = e
      use__charset_ = false
    end

    key.gsub!(/\+|%\h\h/, TBLDECWWWCOMP_)
    if val
      val.gsub!(/\+|%\h\h/, TBLDECWWWCOMP_)
    else
      val = +''
    end

    ary << [key, val]
  end
  ary.each do |k, v|
    k.force_encoding(enc)
    k.scrub!
    v.force_encoding(enc)
    v.scrub!
  end
  ary
end

Decodes URL-encoded form data from given str.

This decodes application/x-www-form-urlencoded data and returns an array of key-value arrays.

This refers url.spec.whatwg.org/#concept-urlencoded-parser, so this supports only &-separator, and doesn't support ;-separator.

ary = URI.decode_www_form("a=1&a=2&b=3")
ary                   #=> [['a', '1'], ['a', '2'], ['b', '3']]
ary.assoc('a').last   #=> '1'
ary.assoc('b').last   #=> '3'
ary.rassoc('a').last  #=> '2'
Hash[ary]             #=> {"a"=>"2", "b"=>"3"}

See URI.decode_www_form_component, URI.encode_www_form.

decode_www_form_component(str, enc=Encoding::UTF_8) Show source
# File lib/uri/common.rb, line 323
def self.decode_www_form_component(str, enc=Encoding::UTF_8)
  raise ArgumentError, "invalid %-encoding (#{str})" if /%(?!\h\h)/ =~ str
  str.b.gsub(/\+|%\h\h/, TBLDECWWWCOMP_).force_encoding(enc)
end

Decodes given str of URL-encoded form data.

This decodes + to SP.

See URI.encode_www_form_component, URI.decode_www_form.

encode_www_form(enum, enc=nil) Show source
# File lib/uri/common.rb, line 355
def self.encode_www_form(enum, enc=nil)
  enum.map do |k,v|
    if v.nil?
      encode_www_form_component(k, enc)
    elsif v.respond_to?(:to_ary)
      v.to_ary.map do |w|
        str = encode_www_form_component(k, enc)
        unless w.nil?
          str << '='
          str << encode_www_form_component(w, enc)
        end
      end.join('&')
    else
      str = encode_www_form_component(k, enc)
      str << '='
      str << encode_www_form_component(v, enc)
    end
  end.join('&')
end

Generates 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 calling 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 refers url.spec.whatwg.org/#concept-urlencoded-serializer

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.

encode_www_form_component(str, enc=nil) Show source
# File lib/uri/common.rb, line 305
def self.encode_www_form_component(str, enc=nil)
  str = str.to_s.dup
  if str.encoding != Encoding::ASCII_8BIT
    if enc && enc != Encoding::ASCII_8BIT
      str.encode!(Encoding::UTF_8, invalid: :replace, undef: :replace)
      str.encode!(enc, fallback: ->(x){"&##{x.ord};"})
    end
    str.force_encoding(Encoding::ASCII_8BIT)
  end
  str.gsub!(/[^*\-.0-9A-Z_a-z]/, TBLENCWWWCOMP_)
  str.force_encoding(Encoding::US_ASCII)
end

Encodes 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.

If enc is given, convert str to the encoding before percent encoding.

This is an implementation of www.w3.org/TR/2013/CR-html5-20130806/forms.html#url-encoded-form-data.

See URI.decode_www_form_component, URI.encode_www_form.

extract(str, schemes = nil, &block) Show source
# File lib/uri/common.rb, line 235
def self.extract(str, schemes = nil, &block)
  warn "URI.extract is obsolete", uplevel: 1 if $VERBOSE
  DEFAULT_PARSER.extract(str, schemes, &block)
end

Synopsis

URI::extract(str[, schemes][,&blk])

Args

str

String to extract URIs from.

schemes

Limit URI matching to 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:[email protected] and here also.")
# => ["http://foo.example.com/bla", "mailto:[email protected]"]
for(scheme, *arguments, default: Generic) Show source
# File lib/uri/common.rb, line 75
def self.for(scheme, *arguments, default: Generic)
  if scheme
    uri_class = @@schemes[scheme.upcase] || default
  else
    uri_class = default
  end

  return uri_class.new(scheme, *arguments)
end

Construct a URI instance, using the scheme to detect the appropriate class from URI.scheme_list.

join(*str) Show source
# File lib/uri/common.rb, line 207
def self.join(*str)
  RFC3986_PARSER.join(*str)
end

Synopsis

URI::join(str[, str, ...])

Args

str

String(s) to work with, will be converted to RFC3986 URIs before merging.

Description

Joins URIs.

Usage

require 'uri'

URI.join("http://example.com/","main.rbx")
# => #<URI::HTTP http://example.com/main.rbx>

URI.join('http://example.com', 'foo')
# => #<URI::HTTP http://example.com/foo>

URI.join('http://example.com', '/foo', '/bar')
# => #<URI::HTTP http://example.com/bar>

URI.join('http://example.com', '/foo', 'bar')
# => #<URI::HTTP http://example.com/bar>

URI.join('http://example.com', '/foo/', 'bar')
# => #<URI::HTTP http://example.com/foo/bar>
open(name, *rest, &block) Show source
# File lib/open-uri.rb, line 23
def self.open(name, *rest, &block)
  if name.respond_to?(:open)
    name.open(*rest, &block)
  elsif name.respond_to?(:to_str) &&
        %r{\A[A-Za-z][A-Za-z0-9+\-\.]*://} =~ name &&
        (uri = URI.parse(name)).respond_to?(:open)
    uri.open(*rest, &block)
  else
    super
  end
end

Allows the opening of various resources including URIs.

If the first argument responds to the 'open' method, 'open' is called on it with the rest of the arguments.

If the first argument is a string that begins with <code>(protocol)://<code>, it is parsed by URI.parse. If the parsed object responds to the 'open' method, 'open' is called on it with the rest of the arguments.

Otherwise, Kernel#open is called.

OpenURI::OpenRead#open provides URI::HTTP#open, URI::HTTPS#open and URI::FTP#open, Kernel#open.

We can accept URIs and strings that begin with http://, https:// and ftp://. In these cases, the opened file object is extended by OpenURI::Meta.

Calls superclass method
parse(uri) Show source
# File lib/uri/common.rb, line 170
def self.parse(uri)
  RFC3986_PARSER.parse(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/")
# => #<URI::HTTP http://www.ruby-lang.org/>
uri.scheme
# => "http"
uri.host
# => "www.ruby-lang.org"

It's recommended to first ::escape the provided uri_str if there are any invalid URI characters.

regexp(schemes = nil) Show source
# File lib/uri/common.rb, line 272
def self.regexp(schemes = nil)
  warn "URI.regexp is obsolete", uplevel: 1 if $VERBOSE
  DEFAULT_PARSER.make_regexp(schemes)
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 its 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
scheme_list() Show source
# File lib/uri/common.rb, line 67
def self.scheme_list
  @@schemes
end

Returns a Hash of the defined schemes.

split(uri) Show source
# File lib/uri/common.rb, line 133
def self.split(uri)
  RFC3986_PARSER.split(uri)
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'

URI.split("http://www.ruby-lang.org/")
# => ["http", nil, "www.ruby-lang.org", nil, nil, "/", nil, nil, nil]

Ruby Core © 1993–2020 Yukihiro Matsumoto
Licensed under the Ruby License.
Ruby Standard Library © contributors
Licensed under their own licenses.