class URI::FTP

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=i

uri2 = URI::FTP.build({:host => 'ftp.example.com',
  :path => 'ruby/src'})
puts uri2.to_s  ->  ftp://ftp.example.com/ruby/src

# File lib/uri/ftp.rb, line 96
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.

# File lib/uri/ftp.rb, line 133
def initialize(scheme,
               userinfo, host, port, registry,
               path, opaque,
               query,
               fragment,
               parser = nil,
               arg_check = false)
  raise InvalidURIError unless path
  path = path.sub(/^\//,'')
  path.sub!(/^%2F/,'/')
  super(scheme, userinfo, host, port, registry, path, opaque,
        query, fragment, parser, arg_check)
  @typecode = nil
  if tmp = @path.index(TYPECODE_PREFIX)
    typecode = @path[tmp + TYPECODE_PREFIX.size..-1]
    @path = @path[0..tmp - 1]

    if arg_check
      self.typecode = typecode
    else
      self.set_typecode(typecode)
    end
  end
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”

# File lib/uri/ftp.rb, line 241
def path
  return @path.sub(/^\//,'').sub(/^%2F/,'/')
end

Returns a String representation of the URI::FTP

# File lib/uri/ftp.rb, line 252
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

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>

# File lib/uri/ftp.rb, line 209
def typecode=(typecode)
  check_typecode(typecode)
  set_typecode(typecode)
  typecode
end

Private setter for the path of the URI::FTP

# File lib/uri/ftp.rb, line 246
def set_path(v)
  super("/" + v.sub(/^\//, "%2F"))
end

Private setter for the typecode v

see also URI::FTP.typecode=

# File lib/uri/ftp.rb, line 180
def set_typecode(v)
  @typecode = v
end

validates typecode v, returns a true or false boolean

# File lib/uri/ftp.rb, line 166
def check_typecode(v)
  if TYPECODE.include?(v)
    return true
  else
    raise InvalidComponentError,
      "bad typecode(expected #{TYPECODE.join(', ')}): #{v}"
  end
end