Fog::AWS

# File lib/fog/providers/aws.rb, line 49
def self.escape(string)
  string.gsub(/([^a-zA-Z0-9_.\-~]+)/) {
    "%" + $1.unpack("H2" * $1.bytesize).join("%").upcase
  }
end

# File lib/fog/providers/aws.rb, line 36
def self.indexed_filters(filters)
  params = {}
  filters.keys.each_with_index do |key, key_index|
    key_index += 1
    params[format('Filter.%d.Name', key_index)] = key
    [*filters[key]].each_with_index do |value, value_index|
      value_index += 1
      params[format('Filter.%d.Value.%d', key_index, value_index)] = value
    end
  end
  params
end

# File lib/fog/providers/aws.rb, line 25
def self.indexed_param(key, values)
  params = {}
  unless key.include?('%d')
    key << '.%d'
  end
  [*values].each_with_index do |value, index|
    params[format(key, index + 1)] = value
  end
  params
end

# File lib/fog/providers/aws.rb, line 55
def self.signed_params(params, options = {})
  params.merge!({
    'AWSAccessKeyId'    => options[:aws_access_key_id],
    'SignatureMethod'   => 'HmacSHA256',
    'SignatureVersion'  => '2',
    'Timestamp'         => Time.now.utc.strftime("%Y-%m-%dT%H:%M:%SZ"),
    'Version'           => options[:version]
  })

  body = ''
  for key in params.keys.sort
    unless (value = params[key]).nil?
      body << "#{key}=#{escape(value.to_s)}&"
    end
  end
  string_to_sign = "POST\n#{options[:host]}:#{options[:port]}\n#{options[:path]}\n" << body.chop
  signed_string = options[:hmac].sign(string_to_sign)
  body << "Signature=#{escape(Base64.encode64(signed_string).chomp!)}"

  body
end