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extensions.rb
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extensions.rb
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#encoding: BINARY
#:stopdoc:
class Hash
def to_query_string(include_question_mark = true)
query_string = ''
unless empty?
query_string << '?' if include_question_mark
query_string << inject([]) do |params, (key, value)|
params << "#{key}=#{AWS::S3.escape_uri_component(value)}"
end.join('&')
end
query_string
end
def to_normalized_options
# Convert all option names to downcased strings, and replace underscores with hyphens
inject({}) do |normalized_options, (name, value)|
normalized_options[name.to_header] = value.to_s
normalized_options
end
end
def to_normalized_options!
replace(to_normalized_options)
end
end
class String
if RUBY_VERSION <= '1.9'
def previous!
self[-1] -= 1
self
end
else
def previous!
self[-1] = (self[-1].ord - 1).chr
self
end
end
def tap
yield(self)
self
end unless ''.respond_to?(:tap)
def previous
dup.previous!
end
def to_header
downcase.tr('_', '-')
end
# ActiveSupport adds an underscore method to String so let's just use that one if
# we find that the method is already defined
def underscore
gsub(/::/, '/').
gsub(/([A-Z]+)([A-Z][a-z])/,'\1_\2').
gsub(/([a-z\d])([A-Z])/,'\1_\2').
tr("-", "_").downcase
end unless public_method_defined? :underscore
if RUBY_VERSION >= '1.9'
def valid_utf8?
dup.force_encoding('UTF-8').valid_encoding?
end
else
def valid_utf8?
scan(Regexp.new('[^\x00-\xa0]', nil, 'u')) { |s| s.unpack('U') }
true
rescue ArgumentError
false
end
end
# All paths in in S3 have to be valid unicode so this takes care of
# cleaning up any strings that aren't valid utf-8 according to String#valid_utf8?
if RUBY_VERSION >= '1.9'
def remove_extended!
sanitized_string = ''
each_byte do |byte|
character = byte.chr
sanitized_string << character if character.ascii_only?
end
sanitized_string
end
else
def remove_extended!
gsub!(/[\x80-\xFF]/) { "%02X" % $&[0] }
end
end
def remove_extended
dup.remove_extended!
end
end
class CoercibleString < String
class << self
def coerce(string)
new(string).coerce
end
end
def coerce
case self
when 'true'; true
when 'false'; false
# Don't coerce numbers that start with zero
when /^[1-9]+\d*$/; Integer(self)
when datetime_format; Time.parse(self)
else
self
end
end
private
# Lame hack since Date._parse is so accepting. S3 dates are of the form: '2006-10-29T23:14:47.000Z'
# so unless the string looks like that, don't even try, otherwise it might convert an object's
# key from something like '03 1-2-3-Apple-Tree.mp3' to Sat Feb 03 00:00:00 CST 2001.
def datetime_format
/^\d{4}-\d{2}-\d{2}\w\d{2}:\d{2}:\d{2}/
end
end
class Symbol
def to_header
to_s.to_header
end
end
module Kernel
def __method__(depth = 0)
caller[depth][/`([^']+)'/, 1]
end if RUBY_VERSION <= '1.8.7'
def __called_from__
caller[1][/`([^']+)'/, 1]
end if RUBY_VERSION > '1.8.7'
def expirable_memoize(reload = false, storage = nil)
current_method = RUBY_VERSION > '1.8.7' ? __called_from__ : __method__(1)
storage = "@#{storage || current_method}"
if reload
instance_variable_set(storage, nil)
else
if cache = instance_variable_get(storage)
return cache
end
end
instance_variable_set(storage, yield)
end
def require_library_or_gem(library, gem_name = nil)
if RUBY_VERSION >= '1.9'
gem(gem_name || library, '>=0')
end
require library
rescue LoadError => library_not_installed
begin
require 'rubygems'
require library
rescue LoadError
raise library_not_installed
end
end
end
class Object
def returning(value)
yield(value)
value
end
end
class Module
def memoized(method_name)
original_method = "unmemoized_#{method_name}_#{Time.now.to_i}"
alias_method original_method, method_name
module_eval(<<-EVAL, __FILE__, __LINE__)
def #{method_name}(reload = false, *args, &block)
expirable_memoize(reload) do
send(:#{original_method}, *args, &block)
end
end
EVAL
end
def constant(name, value)
unless const_defined?(name)
const_set(name, value)
module_eval(<<-EVAL, __FILE__, __LINE__)
def self.#{name.to_s.downcase}
#{name.to_s}
end
EVAL
end
end
end
class Class # :nodoc:
def cattr_reader(*syms)
syms.flatten.each do |sym|
class_eval(<<-EOS, __FILE__, __LINE__)
unless defined? @@#{sym}
@@#{sym} = nil
end
def self.#{sym}
@@#{sym}
end
def #{sym}
@@#{sym}
end
EOS
end
end
def cattr_writer(*syms)
syms.flatten.each do |sym|
class_eval(<<-EOS, __FILE__, __LINE__)
unless defined? @@#{sym}
@@#{sym} = nil
end
def self.#{sym}=(obj)
@@#{sym} = obj
end
def #{sym}=(obj)
@@#{sym} = obj
end
EOS
end
end
def cattr_accessor(*syms)
cattr_reader(*syms)
cattr_writer(*syms)
end
end if Class.instance_methods(false).grep(/^cattr_(?:reader|writer|accessor)$/).empty?
module SelectiveAttributeProxy
def self.included(klass)
klass.extend(ClassMethods)
klass.class_eval(<<-EVAL, __FILE__, __LINE__)
cattr_accessor :attribute_proxy
cattr_accessor :attribute_proxy_options
# Default name for attribute storage
self.attribute_proxy = :attributes
self.attribute_proxy_options = {:exclusively => true}
private
# By default proxy all attributes
def proxiable_attribute?(name)
return true unless self.class.attribute_proxy_options[:exclusively]
send(self.class.attribute_proxy).has_key?(name)
end
def method_missing(method, *args, &block)
# Autovivify attribute storage
if method == self.class.attribute_proxy
ivar = "@\#{method}"
instance_variable_set(ivar, {}) unless instance_variable_get(ivar).is_a?(Hash)
instance_variable_get(ivar)
# Delegate to attribute storage
elsif method.to_s =~ /^(\\w+)(=?)$/ && proxiable_attribute?($1)
attributes_hash_name = self.class.attribute_proxy
$2.empty? ? send(attributes_hash_name)[$1] : send(attributes_hash_name)[$1] = args.first
else
super
end
end
EVAL
end
module ClassMethods
def proxy_to(attribute_name, options = {})
if attribute_name.is_a?(Hash)
options = attribute_name
else
self.attribute_proxy = attribute_name
end
self.attribute_proxy_options = options
end
end
end
# When streaming data up, Net::HTTPGenericRequest hard codes a chunk size of 1k. For large files this
# is an unfortunately low chunk size, so here we make it use a much larger default size and move it into a method
# so that the implementation of send_request_with_body_stream doesn't need to be changed to change the chunk size (at least not anymore
# than I've already had to...).
module Net
class HTTPGenericRequest
def send_request_with_body_stream(sock, ver, path, f)
raise ArgumentError, "Content-Length not given and Transfer-Encoding is not `chunked'" unless content_length() or chunked?
unless content_type()
warn 'net/http: warning: Content-Type did not set; using application/x-www-form-urlencoded' if $VERBOSE
set_content_type 'application/x-www-form-urlencoded'
end
write_header sock, ver, path
if chunked?
while s = f.read(chunk_size)
sock.write(sprintf("%x\r\n", s.length) << s << "\r\n")
end
sock.write "0\r\n\r\n"
else
while s = f.read(chunk_size)
sock.write s
end
end
end
def chunk_size
1048576 # 1 megabyte
end
end
# Net::HTTP before 1.8.4 doesn't have the use_ssl? method or the Delete request type
class HTTP
def use_ssl?
@use_ssl
end unless public_method_defined? :use_ssl?
class Delete < HTTPRequest
METHOD = 'DELETE'
REQUEST_HAS_BODY = false
RESPONSE_HAS_BODY = true
end unless const_defined? :Delete
end
end
class XmlGenerator < String #:nodoc:
attr_reader :xml
def initialize
@xml = Builder::XmlMarkup.new(:indent => 2, :target => self)
super()
build
end
end
#:startdoc: