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require "addressable/template"
module Ramaze
# This is a simple prototype-implementation of how we could do routing
# supported by URI templates.
#
# Please see the spec for example usage as it's not integrated yet in any way.
#
# What it does is basically that you can give it any URI template and a final
# mapping, and it will extract the variables from the URI and merge them into
# the QUERY_STRING, which is parsed again in Ramaze if you issue
# Request#params.
#
# @example given mapping like:
#
# map('/customer/{customer_id}/order/{order_id}', '/order/show')
#
# @example output of request.params at '/order/show'
#
# {'customer_id => '12', 'order_id' => '15'}
#
# I haven't explored the full capabilities of the templates yet, but the
# specs of Addressable::Template suggest that there is a lot to be
# discovered.
class AddressableRoute
def initialize(app, routes = {})
@app = app
@routes = {}
routes.each{|from, to| map(from, to) }
end
def call(env)
path_info = env['PATH_INFO']
@routes.each do |template, target|
extracted = template.extract(path_info)
return dispatch(env, target, extracted) if extracted
end
@app.call(env)
end
def map(from, to)
@routes[Addressable::Template.new(from)] = to
end
def dispatch(env, target, extracted)
env['PATH_INFO'] = target
original = Rack::Utils.parse_query(env['QUERY_STRING'])
env['QUERY_STRING'] = Rack::Utils.build_query(original.merge(extracted))
@app.call(env)
end
end
end
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11 entries across 11 versions & 3 rubygems