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# = uri/ftp.rb
#
# Author:: Akira Yamada <akira@ruby-lang.org>
# License:: You can redistribute it and/or modify it under the same term as Ruby.
# Revision:: $Id$
#
# See URI for general documentation
#
require 'uri/generic'
module URI
#
# FTP URI syntax is defined by RFC1738 section 3.2.
#
# This class will be redesigned because of difference of implementations;
# the structure of its path. draft-hoffman-ftp-uri-04 is a draft but it
# is a good summary about the de facto spec.
# http://tools.ietf.org/html/draft-hoffman-ftp-uri-04
#
class FTP < Generic
# A Default port of 21 for URI::FTP
DEFAULT_PORT = 21
#
# An Array of the available components for URI::FTP
#
COMPONENT = [
:scheme,
:userinfo, :host, :port,
:path, :typecode
].freeze
#
# Typecode is "a", "i" or "d".
#
# * "a" indicates a text file (the FTP command was ASCII)
# * "i" indicates a binary file (FTP command IMAGE)
# * "d" indicates the contents of a directory should be displayed
#
TYPECODE = ['a', 'i', 'd'].freeze
# Typecode prefix
# ';type='
TYPECODE_PREFIX = ';type='.freeze
# alternate initialization
# Creates a new URI::FTP object.
#
# Unlike build(), this method does not escape the path component as
# required by RFC1738; instead it is treated as per RFC2396.
#
# Arguments are user, password, host, port, path, typecode,
# and arg_check, in that order.
def self.new2(user, password, host, port, path,
typecode = nil, arg_check = true)
typecode = nil if typecode.size == 0
if typecode && !TYPECODE.include?(typecode)
raise ArgumentError,
"bad typecode is specified: #{typecode}"
end
# do escape
self.new('ftp',
[user, password],
host, port, nil,
typecode ? path + TYPECODE_PREFIX + typecode : path,
nil, nil, nil, arg_check)
end
#
# == Description
#
# Creates a new URI::FTP object from components, with syntax checking.
#
# The components accepted are +userinfo+, +host+, +port+, +path+ and
# +typecode+.
#
# The components should be provided either as an Array, or as a Hash
# with keys formed by preceding the component names with a colon.
#
# If an Array is used, the components must be passed in the order
# [userinfo, host, port, path, typecode]
#
# If the path supplied is absolute, it will be escaped in order to
# make it absolute in the URI. Examples:
#
# require 'uri'
#
# uri = URI::FTP.build(['user:password', 'ftp.example.com', nil,
# '/path/file.> zip', 'i'])
# puts uri.to_s -> ftp://user:password@ftp.example.com/%2Fpath/file.zip;type=a
#
# uri2 = URI::FTP.build({:host => 'ftp.example.com',
# :path => 'ruby/src'})
# puts uri2.to_s -> ftp://ftp.example.com/ruby/src
#
def self.build(args)
# Fix the incoming path to be generic URL syntax
# FTP path -> URL path
# foo/bar /foo/bar
# /foo/bar /%2Ffoo/bar
#
if args.kind_of?(Array)
args[3] = '/' + args[3].sub(/^\//, '%2F')
else
args[:path] = '/' + args[:path].sub(/^\//, '%2F')
end
tmp = Util::make_components_hash(self, args)
if tmp[:typecode]
if tmp[:typecode].size == 1
tmp[:typecode] = TYPECODE_PREFIX + tmp[:typecode]
end
tmp[:path] << tmp[:typecode]
end
return super(tmp)
end
#
# == Description
#
# Creates a new URI::FTP object from generic URL components with no
# syntax checking.
#
# Unlike build(), this method does not escape the path component as
# required by RFC1738; instead it is treated as per RFC2396.
#
# Arguments are +scheme+, +userinfo+, +host+, +port+, +registry+, +path+,
# +opaque+, +query+ and +fragment+, in that order.
#
def initialize(*arg)
arg[5] = arg[5].sub(/^\//,'').sub(/^%2F/,'/')
super(*arg)
@typecode = nil
tmp = @path.index(TYPECODE_PREFIX)
if tmp
typecode = @path[tmp + TYPECODE_PREFIX.size..-1]
@path = @path[0..tmp - 1]
if arg[-1]
self.typecode = typecode
else
self.set_typecode(typecode)
end
end
end
# typecode accessor
#
# see URI::FTP::COMPONENT
attr_reader :typecode
# validates typecode +v+,
# returns a +true+ or +false+ boolean
#
def check_typecode(v)
if TYPECODE.include?(v)
return true
else
raise InvalidComponentError,
"bad typecode(expected #{TYPECODE.join(', ')}): #{v}"
end
end
private :check_typecode
# private setter for the typecode +v+
#
# see also URI::FTP.typecode=
#
def set_typecode(v)
@typecode = v
end
protected :set_typecode
#
# == Args
#
# +v+::
# String
#
# == Description
#
# public setter for the typecode +v+.
# (with validation)
#
# see also URI::FTP.check_typecode
#
# == Usage
#
# require 'uri'
#
# uri = URI.parse("ftp://john@ftp.example.com/my_file.img")
# #=> #<URI::FTP:0x00000000923650 URL:ftp://john@ftp.example.com/my_file.img>
# uri.typecode = "i"
# # => "i"
# uri
# #=> #<URI::FTP:0x00000000923650 URL:ftp://john@ftp.example.com/my_file.img;type=i>
#
def typecode=(typecode)
check_typecode(typecode)
set_typecode(typecode)
typecode
end
def merge(oth) # :nodoc:
tmp = super(oth)
if self != tmp
tmp.set_typecode(oth.typecode)
end
return tmp
end
# Returns the path from an FTP URI.
#
# RFC 1738 specifically states that the path for an FTP URI does not
# include the / which separates the URI path from the URI host. Example:
#
# ftp://ftp.example.com/pub/ruby
#
# The above URI indicates that the client should connect to
# ftp.example.com then cd pub/ruby from the initial login directory.
#
# If you want to cd to an absolute directory, you must include an
# escaped / (%2F) in the path. Example:
#
# ftp://ftp.example.com/%2Fpub/ruby
#
# This method will then return "/pub/ruby"
#
def path
return @path.sub(/^\//,'').sub(/^%2F/,'/')
end
def set_path(v)
super("/" + v.sub(/^\//, "%2F"))
end
protected :set_path
def to_s
save_path = nil
if @typecode
save_path = @path
@path = @path + TYPECODE_PREFIX + @typecode
end
str = super
if @typecode
@path = save_path
end
return str
end
end
@@schemes['FTP'] = FTP
end
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