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require 'uri'
require 'xmlrpc/client'
module ActionWebService # :nodoc:
module Client # :nodoc:
# Implements XML-RPC client support
#
# ==== Example Usage
#
# class BloggerAPI < ActionWebService::API::Base
# inflect_names false
# api_method :getRecentPosts, :returns => [[Blog::Post]]
# end
#
# blog = ActionWebService::Client::XmlRpc.new(BloggerAPI, "http://.../RPC", :handler_name => "blogger")
# posts = blog.getRecentPosts
class XmlRpc < Base
# Creates a new web service client using the XML-RPC protocol.
#
# +api+ must be an ActionWebService::API::Base derivative, and
# +endpoint_uri+ must point at the relevant URL to which protocol requests
# will be sent with HTTP POST.
#
# Valid options:
# [<tt>:handler_name</tt>] If the remote server defines its services inside special
# handler (the Blogger API uses a <tt>"blogger"</tt> handler name for example),
# provide it here, or your method calls will fail
def initialize(api, endpoint_uri, options={})
@api = api
@handler_name = options[:handler_name]
@protocol = ActionWebService::Protocol::XmlRpc::XmlRpcProtocol.new
@client = XMLRPC::Client.new2(endpoint_uri, options[:proxy], options[:timeout])
end
protected
def perform_invocation(method_name, args)
method = @api.api_methods[method_name.to_sym]
if method.expects && method.expects.length != args.length
raise(ArgumentError, "#{method.public_name}: wrong number of arguments (#{args.length} for #{method.expects.length})")
end
args = method.cast_expects(args.dup) rescue args
if method.expects
method.expects.each_with_index{ |type, i| args[i] = @protocol.value_to_xmlrpc_wire_format(args[i], type) }
end
ok, return_value = @client.call2(public_name(method_name), *args)
return (method.cast_returns(return_value.dup) rescue return_value) if ok
raise(ClientError, "#{return_value.faultCode}: #{return_value.faultString}")
end
def public_name(method_name)
public_name = @api.public_api_method_name(method_name)
@handler_name ? "#{@handler_name}.#{public_name}" : public_name
end
end
end
end
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