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module ActionWebService # :nodoc:
module API # :nodoc:
module ActionController # :nodoc:
def self.append_features(base) # :nodoc:
base.class_eval do
class << self
alias_method :inherited_without_api, :inherited
alias_method :web_service_api_without_require, :web_service_api
end
end
base.extend(ClassMethods)
end
module ClassMethods
# Creates a client for accessing remote web services, using the
# given +protocol+ to communicate with the +endpoint_uri+.
#
# ==== Example
#
# class MyController < ActionController::Base
# web_client_api :blogger, :xmlrpc, "http://blogger.com/myblog/api/RPC2", :handler_name => 'blogger'
# end
#
# In this example, a protected method named <tt>blogger</tt> will
# now exist on the controller, and calling it will return the
# XML-RPC client object for working with that remote service.
#
# +options+ is the set of protocol client specific options,
# see a protocol client class for details.
#
# If your API definition does not exist on the load path with the
# correct rules for it to be found using +name+, you can pass through
# the API definition class in +options+, using a key of <tt>:api</tt>
def web_client_api(name, protocol, endpoint_uri, options={})
unless method_defined?(name)
api_klass = options.delete(:api) || require_web_service_api(name)
class_eval do
define_method(name) do
probe_protocol_client(api_klass, protocol, endpoint_uri, options)
end
protected name
end
end
end
def web_service_api(definition=nil) # :nodoc:
return web_service_api_without_require if definition.nil?
case definition
when String, Symbol
klass = require_web_service_api(definition)
else
klass = definition
end
web_service_api_without_require(klass)
end
def require_web_service_api(name) # :nodoc:
case name
when String, Symbol
file_name = name.to_s.underscore + "_api"
class_name = file_name.camelize
class_names = [class_name, class_name.sub(/Api$/, 'API')]
begin
require_dependency(file_name)
rescue LoadError => load_error
requiree = / -- (.*?)(\.rb)?$/.match(load_error).to_a[1]
raise LoadError, requiree == file_name ? "Missing API definition file in apis/#{file_name}.rb" : "Can't load file: #{requiree}"
end
klass = nil
class_names.each do |name|
klass = name.constantize rescue nil
break unless klass.nil?
end
unless klass
raise(NameError, "neither #{class_names[0]} or #{class_names[1]} found")
end
klass
else
raise(ArgumentError, "expected String or Symbol argument")
end
end
private
def inherited(child)
inherited_without_api(child)
child.web_service_api(child.controller_path)
rescue Exception => e
end
end
end
end
end
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