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require 'rack/typhoeus/middleware/params_decoder/helper'
module Rack
module Typhoeus
module Middleware
# This Rack middleware takes care of the proper deserialization of
# the nested params encoded by Typhoeus.
#
# @example Require the railtie when using Rails.
# require 'typhoeus/railtie'
#
# @example Include the middleware for Rack based applications.
# use Rack::Typhoeus::Middleware::ParamsDecoder
#
# @example Use the helper directly. Not recommended as b/c the interface might change.
# require 'rack/typhoeus/middleware/params_decoder/helper'
# include Rack::Typhoeus::Middleware::ParamsDecoder::Helper
# decode!(params)
#
# @author Dwayne Macgowan
# @since 0.5.4
class ParamsDecoder
include ParamsDecoder::Helper
def initialize(app)
@app = app
end
def call(env)
req = Rack::Request.new(env)
decode(req.params).each_pair { |k, v| update_params req, k, v }
@app.call(env)
end
private
# Persist params change in environment. Extracted from:
# https://github.com/rack/rack/blob/master/lib/rack/request.rb#L243
def update_params(req, k, v)
found = false
if req.GET.has_key?(k)
found = true
req.GET[k] = v
end
if req.POST.has_key?(k)
found = true
req.POST[k] = v
end
unless found
req.GET[k] = v
end
end
end
end
end
end
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