Module: AmazonFlexPay::Util

Extended by:
Util
Included in:
AmazonFlexPay, Util
Defined in:
lib/amazon_flex_pay/util.rb

Constant Summary collapse

UNSAFE =

:nodoc:

/[^A-Za-z0-9_.~-]/

Instance Method Summary collapse

Instance Method Details

#escape(value) ⇒ Object

Amazon is very specific about which chars should be escaped, and which should not.



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# File 'lib/amazon_flex_pay/util.rb', line 23

def escape(value) #:nodoc:
  # note that URI.escape(' ') => '%20', and CGI.escape(' ') => '+'
  URI.escape(value.to_s, UNSAFE)
end

#query_string(params, prefix = nil) ⇒ Object

Flattens a possibly-nested hash into a query string for Amazon. With Amazon, nested hashes are flattened with a period, as follows:

AmazonFlexPay::Util.query_string(:foo => {:hello => 'world'})
=> "foo.hello=world"



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# File 'lib/amazon_flex_pay/util.rb', line 9

def query_string(params, prefix = nil) #:nodoc:
  prefix = "#{prefix}." if prefix
  params.keys.sort { |a, b| a.to_s <=> b.to_s }.collect do |key|
    case val = params[key]
      when Hash
      query_string(val, key)
      else
      "#{prefix}#{key}=#{escape val}"
    end
  end.join('&')
end