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+# == Author and Copyright
+#
+# Copyright (C) 2001-2004 by Michael Neumann (mailto:mneumann@ntecs.de)
+#
+# Released under the same term of license as Ruby.
+#
+# == Overview
+#
+# XMLRPC is a lightweight protocol that enables remote procedure calls over
+# HTTP.  It is defined at http://www.xmlrpc.com.
+#
+# XMLRPC allows you to create simple distributed computing solutions that span
+# computer languages.  Its distinctive feature is its simplicity compared to
+# other approaches like SOAP and CORBA.
+#
+# The Ruby standard library package 'xmlrpc' enables you to create a server that
+# implements remote procedures and a client that calls them.  Very little code
+# is required to achieve either of these.
+#
+# == Example
+#
+# Try the following code.  It calls a standard demonstration remote procedure.
+#
+#   require 'xmlrpc/client'
+#   require 'pp'
+#
+#   server = XMLRPC::Client.new2("http://xmlrpc-c.sourceforge.net/api/sample.php")
+#   result = server.call("sample.sumAndDifference", 5, 3)
+#   pp result
+#
+# == Documentation
+#
+# See http://www.ntecs.de/ruby/xmlrpc4r/.  There is plenty of detail there to
+# use the client and implement a server.
+#
+# == Features of XMLRPC for Ruby
+#
+# * Extensions
+#   * Introspection
+#   * multiCall
+#   * optionally nil values and integers larger than 32 Bit
+#
+# * Server
+#   * Standalone XML-RPC server
+#   * CGI-based (works with FastCGI)
+#   * Apache mod_ruby server
+#   * WEBrick servlet
+#
+# * Client
+#   * synchronous/asynchronous calls
+#   * Basic HTTP-401 Authentication
+#   * HTTPS protocol (SSL)
+#
+# * Parsers
+#   * NQXML (XMLParser::NQXMLStreamParser, XMLParser::NQXMLTreeParser)
+#   * Expat (XMLParser::XMLStreamParser, XMLParser::XMLTreeParser)
+#   * REXML (XMLParser::REXMLStreamParser)
+#   * xml-scan (XMLParser::XMLScanStreamParser)
+#   * Fastest parser is Expat's XMLParser::XMLStreamParser!
+#
+# * General
+#   * possible to choose between XMLParser module (Expat wrapper) and REXML/NQXML (pure Ruby) parsers
+#   * Marshalling Ruby objects to Hashs and reconstruct them later from a Hash
+#   * SandStorm component architecture XMLRPC::Client interface
+#
+# == Howto
+#
+# === Client
+#
+#   require "xmlrpc/client"
+#
+#   # Make an object to represent the XML-RPC server.
+#   server = XMLRPC::Client.new( "xmlrpc-c.sourceforge.net", "/api/sample.php")
+#
+#   # Call the remote server and get our result
+#   result = server.call("sample.sumAndDifference", 5, 3)
+#
+#   sum = result["sum"]
+#   difference = result["difference"]
+#
+#   puts "Sum: #{sum}, Difference: #{difference}"
+#
+# === XMLRPC::Client with XML-RPC fault-structure handling
+#
+# There are two possible ways, of handling a fault-structure:
+#
+# ==== by catching a XMLRPC::FaultException exception
+#
+#   require "xmlrpc/client"
+#
+#   # Make an object to represent the XML-RPC server.
+#   server = XMLRPC::Client.new( "xmlrpc-c.sourceforge.net", "/api/sample.php")
+#
+#   begin
+#     # Call the remote server and get our result
+#     result = server.call("sample.sumAndDifference", 5, 3)
+#
+#     sum = result["sum"]
+#     difference = result["difference"]
+#
+#     puts "Sum: #{sum}, Difference: #{difference}"
+#
+#   rescue XMLRPC::FaultException => e
+#     puts "Error: "
+#     puts e.faultCode
+#     puts e.faultString
+#   end
+#
+# ==== by calling "call2" which returns a boolean
+#
+#   require "xmlrpc/client"
+#
+#   # Make an object to represent the XML-RPC server.
+#   server = XMLRPC::Client.new( "xmlrpc-c.sourceforge.net", "/api/sample.php")
+#
+#   # Call the remote server and get our result
+#   ok, result = server.call2("sample.sumAndDifference", 5, 3)
+#
+#   if ok
+#     sum = result["sum"]
+#     difference = result["difference"]
+#
+#     puts "Sum: #{sum}, Difference: #{difference}"
+#   else
+#     puts "Error: "
+#     puts result.faultCode
+#     puts result.faultString
+#   end
+#
+# === Using XMLRPC::Client::Proxy
+#
+# You can create a Proxy object onto which you can call methods. This way it
+# looks nicer. Both forms, _call_ and _call2_ are supported through _proxy_ and
+# _proxy2_.  You can additionally give arguments to the Proxy, which will be
+# given to each XML-RPC call using that Proxy.
+#
+#   require "xmlrpc/client"
+#
+#   # Make an object to represent the XML-RPC server.
+#   server = XMLRPC::Client.new( "xmlrpc-c.sourceforge.net", "/api/sample.php")
+#
+#   # Create a Proxy object
+#   sample = server.proxy("sample")
+#
+#   # Call the remote server and get our result
+#   result = sample.sumAndDifference(5,3)
+#
+#   sum = result["sum"]
+#   difference = result["difference"]
+#
+#   puts "Sum: #{sum}, Difference: #{difference}"
+#
+# === CGI-based server using XMLRPC::CGIServer
+#
+# There are also two ways to define handler, the first is
+# like C/PHP, the second like Java, of course both ways
+# can be mixed:
+#
+# ==== C/PHP-like (handler functions)
+#
+#   require "xmlrpc/server"
+#
+#   s = XMLRPC::CGIServer.new
+#
+#   s.add_handler("sample.sumAndDifference") do |a,b|
+#     { "sum" => a + b, "difference" => a - b }
+#   end
+#
+#   s.serve
+#
+# ==== Java-like (handler classes)
+#
+#   require "xmlrpc/server"
+#
+#   s = XMLRPC::CGIServer.new
+#
+#   class MyHandler
+#     def sumAndDifference(a, b)
+#       { "sum" => a + b, "difference" => a - b }
+#     end
+#   end
+#
+#   # NOTE: Security Hole (read below)!!!
+#   s.add_handler("sample", MyHandler.new)
+#   s.serve
+#
+#
+# To return a fault-structure you have to raise an XMLRPC::FaultException e.g.:
+#
+#   raise XMLRPC::FaultException.new(3, "division by Zero")
+#
+# ===== Security Note
+#
+# From Brian Candler:
+#
+#   Above code sample has an extremely nasty security hole, in that you can now call
+#   any method of 'MyHandler' remotely, including methods inherited from Object
+#   and Kernel! For example, in the client code, you can use
+#
+#     puts server.call("sample.send","`","ls")
+#
+#   (backtick being the method name for running system processes). Needless to
+#   say, 'ls' can be replaced with something else.
+#
+#   The version which binds proc objects (or the version presented below in the next section)
+#   doesn't have this problem, but people may be tempted to use the second version because it's
+#   so nice and 'Rubyesque'. I think it needs a big red disclaimer.
+#
+#
+# From Michael:
+#
+# A solution is to undef insecure methods or to use
+# XMLRPC::Service::PublicInstanceMethodsInterface as shown below:
+#
+#   class MyHandler
+#     def sumAndDifference(a, b)
+#       { "sum" => a + b, "difference" => a - b }
+#     end
+#   end
+#
+#   # ... server initialization ...
+#
+#   s.add_handler(XMLRPC::iPIMethods("sample"), MyHandler.new)
+#
+#   # ...
+#
+# This adds only public instance methods explicitly declared in class MyHandler
+# (and not those inherited from any other class).
+#
+# ==== With interface declarations
+#
+# Code sample from the book Ruby Developer's Guide:
+#
+#   require "xmlrpc/server"
+#
+#   class Num
+#     INTERFACE = XMLRPC::interface("num") {
+#       meth 'int add(int, int)', 'Add two numbers', 'add'
+#       meth 'int div(int, int)', 'Divide two numbers'
+#     }
+#
+#     def add(a, b) a + b end
+#     def div(a, b) a / b end
+#   end
+#
+#
+#   s = XMLRPC::CGIServer.new
+#   s.add_handler(Num::INTERFACE, Num.new)
+#   s.serve
+#
+# === Standalone XMLRPC::Server
+#
+# Same as CGI-based server, the only difference being
+#
+#   server = XMLRPC::CGIServer.new
+#
+# must be changed to
+#
+#   server = XMLRPC::Server.new(8080)
+#
+# if you want a server listening on port 8080.
+# The rest is the same.
+#
+# === Choosing a different XMLParser or XMLWriter
+#
+# The examples above all use the default parser (which is now since 1.8
+# XMLParser::REXMLStreamParser) and a default XMLRPC::XMLWriter.
+# If you want to use a different XMLParser, then you have to call the
+# ParserWriterChooseMixin#set_parser method of XMLRPC::Client instances
+# or instances of subclasses of XMLRPC::BasicServer or by editing
+# xmlrpc/config.rb.
+#
+# XMLRPC::Client Example:
+#
+#   # ...
+#   server = XMLRPC::Client.new( "xmlrpc-c.sourceforge.net", "/api/sample.php")
+#   server.set_parser(XMLRPC::XMLParser::XMLParser.new)
+#   # ...
+#
+# XMLRPC::Server Example:
+#
+#   # ...
+#   s = XMLRPC::CGIServer.new
+#   s.set_parser(XMLRPC::XMLParser::XMLStreamParser.new)
+#   # ...
+#
+# or:
+#
+#   # ...
+#   server = XMLRPC::Server.new(8080)
+#   server.set_parser(XMLRPC::XMLParser::NQXMLParser.new)
+#   # ...
+#
+#
+# Note that XMLParser::XMLStreamParser is incredible faster (and uses less memory) than any
+# other parser and scales well for large documents. For example for a 0.5 MB XML
+# document with many tags, XMLParser::XMLStreamParser is ~350 (!) times faster than
+# XMLParser::NQXMLTreeParser and still ~18 times as fast as XMLParser::XMLTreeParser.
+#
+# You can change the XML-writer by calling method ParserWriterChooseMixin#set_writer.
+module XMLRPC; end