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require 'benchmark'
module ActionWebService # :nodoc:
module Dispatcher # :nodoc:
class DispatcherError < ActionWebService::ActionWebServiceError # :nodoc:
end
def self.included(base) # :nodoc:
base.class_inheritable_option(:web_service_dispatching_mode, :direct)
base.class_inheritable_option(:web_service_exception_reporting, true)
base.send(:include, ActionWebService::Dispatcher::InstanceMethods)
end
module InstanceMethods # :nodoc:
private
def invoke_web_service_request(protocol_request)
invocation = web_service_invocation(protocol_request)
if invocation.is_a?(Array) && protocol_request.protocol.is_a?(Protocol::XmlRpc::XmlRpcProtocol)
xmlrpc_multicall_invoke(invocation)
else
web_service_invoke(invocation)
end
end
def web_service_direct_invoke(invocation)
@method_params = invocation.method_ordered_params
arity = method(invocation.api_method.name).arity rescue 0
if arity < 0 || arity > 0
params = @method_params
else
params = []
end
web_service_filtered_invoke(invocation, params)
end
def web_service_delegated_invoke(invocation)
web_service_filtered_invoke(invocation, invocation.method_ordered_params)
end
def web_service_filtered_invoke(invocation, params)
cancellation_reason = nil
return_value = invocation.service.perform_invocation(invocation.api_method.name, params) do |x|
cancellation_reason = x
end
if cancellation_reason
raise(DispatcherError, "request canceled: #{cancellation_reason}")
end
return_value
end
def web_service_invoke(invocation)
case web_service_dispatching_mode
when :direct
return_value = web_service_direct_invoke(invocation)
when :delegated, :layered
return_value = web_service_delegated_invoke(invocation)
end
web_service_create_response(invocation.protocol, invocation.protocol_options, invocation.api, invocation.api_method, return_value)
end
def xmlrpc_multicall_invoke(invocations)
responses = []
invocations.each do |invocation|
if invocation.is_a?(Hash)
responses << [invocation, nil]
next
end
begin
case web_service_dispatching_mode
when :direct
return_value = web_service_direct_invoke(invocation)
when :delegated, :layered
return_value = web_service_delegated_invoke(invocation)
end
api_method = invocation.api_method
if invocation.api.has_api_method?(api_method.name)
response_type = (api_method.returns ? api_method.returns[0] : nil)
return_value = api_method.cast_returns(return_value)
else
response_type = ActionWebService::SignatureTypes.canonical_signature_entry(return_value.class, 0)
end
responses << [return_value, response_type]
rescue Exception => e
responses << [{ 'faultCode' => 3, 'faultString' => e.message }, nil]
end
end
invocation = invocations[0]
invocation.protocol.encode_multicall_response(responses, invocation.protocol_options)
end
def web_service_invocation(request, level = 0)
public_method_name = request.method_name
invocation = Invocation.new
invocation.protocol = request.protocol
invocation.protocol_options = request.protocol_options
invocation.service_name = request.service_name
if web_service_dispatching_mode == :layered
case invocation.protocol
when Protocol::Soap::SoapProtocol
soap_action = request.protocol_options[:soap_action]
if soap_action && soap_action =~ /^\/\w+\/(\w+)\//
invocation.service_name = $1
end
when Protocol::XmlRpc::XmlRpcProtocol
if request.method_name =~ /^([^\.]+)\.(.*)$/
public_method_name = $2
invocation.service_name = $1
end
end
end
if invocation.protocol.is_a? Protocol::XmlRpc::XmlRpcProtocol
if public_method_name == 'multicall' && invocation.service_name == 'system'
if level > 0
raise(DispatcherError, "Recursive system.multicall invocations not allowed")
end
multicall = request.method_params.dup
unless multicall.is_a?(Array) && multicall[0].is_a?(Array)
raise(DispatcherError, "Malformed multicall (expected array of Hash elements)")
end
multicall = multicall[0]
return multicall.map do |item|
raise(DispatcherError, "Multicall elements must be Hash") unless item.is_a?(Hash)
raise(DispatcherError, "Multicall elements must contain a 'methodName' key") unless item.has_key?('methodName')
method_name = item['methodName']
params = item.has_key?('params') ? item['params'] : []
multicall_request = request.dup
multicall_request.method_name = method_name
multicall_request.method_params = params
begin
web_service_invocation(multicall_request, level + 1)
rescue Exception => e
{'faultCode' => 4, 'faultMessage' => e.message}
end
end
end
end
case web_service_dispatching_mode
when :direct
invocation.api = self.class.web_service_api
invocation.service = self
when :delegated, :layered
invocation.service = web_service_object(invocation.service_name)
invocation.api = invocation.service.class.web_service_api
end
if invocation.api.nil?
raise(DispatcherError, "no API attached to #{invocation.service.class}")
end
invocation.protocol.register_api(invocation.api)
request.api = invocation.api
if invocation.api.has_public_api_method?(public_method_name)
invocation.api_method = invocation.api.public_api_method_instance(public_method_name)
else
if invocation.api.default_api_method.nil?
raise(DispatcherError, "no such method '#{public_method_name}' on API #{invocation.api}")
else
invocation.api_method = invocation.api.default_api_method_instance
end
end
if invocation.service.nil?
raise(DispatcherError, "no service available for service name #{invocation.service_name}")
end
unless invocation.service.respond_to?(invocation.api_method.name)
raise(DispatcherError, "no such method '#{public_method_name}' on API #{invocation.api} (#{invocation.api_method.name})")
end
request.api_method = invocation.api_method
begin
invocation.method_ordered_params = invocation.api_method.cast_expects(request.method_params.dup)
rescue
logger.warn "Casting of method parameters failed" unless logger.nil?
invocation.method_ordered_params = request.method_params
end
request.method_params = invocation.method_ordered_params
invocation.method_named_params = {}
invocation.api_method.param_names.inject(0) do |m, n|
invocation.method_named_params[n] = invocation.method_ordered_params[m]
m + 1
end
invocation
end
def web_service_create_response(protocol, protocol_options, api, api_method, return_value)
if api.has_api_method?(api_method.name)
return_type = api_method.returns ? api_method.returns[0] : nil
return_value = api_method.cast_returns(return_value)
else
return_type = ActionWebService::SignatureTypes.canonical_signature_entry(return_value.class, 0)
end
protocol.encode_response(api_method.public_name + 'Response', return_value, return_type, protocol_options)
end
class Invocation # :nodoc:
attr_accessor :protocol
attr_accessor :protocol_options
attr_accessor :service_name
attr_accessor :api
attr_accessor :api_method
attr_accessor :method_ordered_params
attr_accessor :method_named_params
attr_accessor :service
end
end
end
end
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