lib/rubygems/vendor/uri/lib/uri/mailto.rb
# frozen_string_literal: false
# = uri/mailto.rb
#
# Author:: Akira Yamada <akira@ruby-lang.org>
# License:: You can redistribute it and/or modify it under the same term as Ruby.
#
# See Gem::URI for general documentation
#
require_relative 'generic'
module Gem::URI
#
# RFC6068, the mailto URL scheme.
#
class MailTo < Generic
include RFC2396_REGEXP
# A Default port of nil for Gem::URI::MailTo.
DEFAULT_PORT = nil
# An Array of the available components for Gem::URI::MailTo.
COMPONENT = [ :scheme, :to, :headers ].freeze
# :stopdoc:
# "hname" and "hvalue" are encodings of an RFC 822 header name and
# value, respectively. As with "to", all URL reserved characters must
# be encoded.
#
# "#mailbox" is as specified in RFC 822 [RFC822]. This means that it
# consists of zero or more comma-separated mail addresses, possibly
# including "phrase" and "comment" components. Note that all URL
# reserved characters in "to" must be encoded: in particular,
# parentheses, commas, and the percent sign ("%"), which commonly occur
# in the "mailbox" syntax.
#
# Within mailto URLs, the characters "?", "=", "&" are reserved.
# ; RFC 6068
# hfields = "?" hfield *( "&" hfield )
# hfield = hfname "=" hfvalue
# hfname = *qchar
# hfvalue = *qchar
# qchar = unreserved / pct-encoded / some-delims
# some-delims = "!" / "$" / "'" / "(" / ")" / "*"
# / "+" / "," / ";" / ":" / "@"
#
# ; RFC3986
# unreserved = ALPHA / DIGIT / "-" / "." / "_" / "~"
# pct-encoded = "%" HEXDIG HEXDIG
HEADER_REGEXP = /\A(?<hfield>(?:%\h\h|[!$'-.0-;@-Z_a-z~])*=(?:%\h\h|[!$'-.0-;@-Z_a-z~])*)(?:&\g<hfield>)*\z/
# practical regexp for email address
# https://html.spec.whatwg.org/multipage/input.html#valid-e-mail-address
EMAIL_REGEXP = /\A[a-zA-Z0-9.!\#$%&'*+\/=?^_`{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*\z/
# :startdoc:
#
# == Description
#
# Creates a new Gem::URI::MailTo object from components, with syntax checking.
#
# Components can be provided as an Array or Hash. If an Array is used,
# the components must be supplied as <code>[to, headers]</code>.
#
# If a Hash is used, the keys are the component names preceded by colons.
#
# The headers can be supplied as a pre-encoded string, such as
# <code>"subject=subscribe&cc=address"</code>, or as an Array of Arrays
# like <code>[['subject', 'subscribe'], ['cc', 'address']]</code>.
#
# Examples:
#
# require 'rubygems/vendor/uri/lib/uri'
#
# m1 = Gem::URI::MailTo.build(['joe@example.com', 'subject=Ruby'])
# m1.to_s # => "mailto:joe@example.com?subject=Ruby"
#
# m2 = Gem::URI::MailTo.build(['john@example.com', [['Subject', 'Ruby'], ['Cc', 'jack@example.com']]])
# m2.to_s # => "mailto:john@example.com?Subject=Ruby&Cc=jack@example.com"
#
# m3 = Gem::URI::MailTo.build({:to => 'listman@example.com', :headers => [['subject', 'subscribe']]})
# m3.to_s # => "mailto:listman@example.com?subject=subscribe"
#
def self.build(args)
tmp = Util.make_components_hash(self, args)
case tmp[:to]
when Array
tmp[:opaque] = tmp[:to].join(',')
when String
tmp[:opaque] = tmp[:to].dup
else
tmp[:opaque] = ''
end
if tmp[:headers]
query =
case tmp[:headers]
when Array
tmp[:headers].collect { |x|
if x.kind_of?(Array)
x[0] + '=' + x[1..-1].join
else
x.to_s
end
}.join('&')
when Hash
tmp[:headers].collect { |h,v|
h + '=' + v
}.join('&')
else
tmp[:headers].to_s
end
unless query.empty?
tmp[:opaque] << '?' << query
end
end
super(tmp)
end
#
# == Description
#
# Creates a new Gem::URI::MailTo object from generic URL components with
# no syntax checking.
#
# This method is usually called from Gem::URI::parse, which checks
# the validity of each component.
#
def initialize(*arg)
super(*arg)
@to = nil
@headers = []
# The RFC3986 parser does not normally populate opaque
@opaque = "?#{@query}" if @query && !@opaque
unless @opaque
raise InvalidComponentError,
"missing opaque part for mailto URL"
end
to, header = @opaque.split('?', 2)
# allow semicolon as a addr-spec separator
# http://support.microsoft.com/kb/820868
unless /\A(?:[^@,;]+@[^@,;]+(?:\z|[,;]))*\z/ =~ to
raise InvalidComponentError,
"unrecognised opaque part for mailtoURL: #{@opaque}"
end
if arg[10] # arg_check
self.to = to
self.headers = header
else
set_to(to)
set_headers(header)
end
end
# The primary e-mail address of the URL, as a String.
attr_reader :to
# E-mail headers set by the URL, as an Array of Arrays.
attr_reader :headers
# Checks the to +v+ component.
def check_to(v)
return true unless v
return true if v.size == 0
v.split(/[,;]/).each do |addr|
# check url safety as path-rootless
if /\A(?:%\h\h|[!$&-.0-;=@-Z_a-z~])*\z/ !~ addr
raise InvalidComponentError,
"an address in 'to' is invalid as Gem::URI #{addr.dump}"
end
# check addr-spec
# don't s/\+/ /g
addr.gsub!(/%\h\h/, Gem::URI::TBLDECWWWCOMP_)
if EMAIL_REGEXP !~ addr
raise InvalidComponentError,
"an address in 'to' is invalid as uri-escaped addr-spec #{addr.dump}"
end
end
true
end
private :check_to
# Private setter for to +v+.
def set_to(v)
@to = v
end
protected :set_to
# Setter for to +v+.
def to=(v)
check_to(v)
set_to(v)
v
end
# Checks the headers +v+ component against either
# * HEADER_REGEXP
def check_headers(v)
return true unless v
return true if v.size == 0
if HEADER_REGEXP !~ v
raise InvalidComponentError,
"bad component(expected opaque component): #{v}"
end
true
end
private :check_headers
# Private setter for headers +v+.
def set_headers(v)
@headers = []
if v
v.split('&').each do |x|
@headers << x.split(/=/, 2)
end
end
end
protected :set_headers
# Setter for headers +v+.
def headers=(v)
check_headers(v)
set_headers(v)
v
end
# Constructs String from Gem::URI.
def to_s
@scheme + ':' +
if @to
@to
else
''
end +
if @headers.size > 0
'?' + @headers.collect{|x| x.join('=')}.join('&')
else
''
end +
if @fragment
'#' + @fragment
else
''
end
end
# Returns the RFC822 e-mail text equivalent of the URL, as a String.
#
# Example:
#
# require 'rubygems/vendor/uri/lib/uri'
#
# uri = Gem::URI.parse("mailto:ruby-list@ruby-lang.org?Subject=subscribe&cc=myaddr")
# uri.to_mailtext
# # => "To: ruby-list@ruby-lang.org\nSubject: subscribe\nCc: myaddr\n\n\n"
#
def to_mailtext
to = Gem::URI.decode_www_form_component(@to)
head = ''
body = ''
@headers.each do |x|
case x[0]
when 'body'
body = Gem::URI.decode_www_form_component(x[1])
when 'to'
to << ', ' + Gem::URI.decode_www_form_component(x[1])
else
head << Gem::URI.decode_www_form_component(x[0]).capitalize + ': ' +
Gem::URI.decode_www_form_component(x[1]) + "\n"
end
end
"To: #{to}
#{head}
#{body}
"
end
alias to_rfc822text to_mailtext
end
register_scheme 'MAILTO', MailTo
end