Ruby 1.8.7 リファレンスマニュアル > ライブラリ一覧 > xmlrpcライブラリ

library xmlrpc

要約

XML-RPC を扱うためのライブラリです。

このページは xmlrpc ライブラリのまとめのページであり、require 'xmlrpc' を実行してもエラーになることに注意して下さい。

Author and Copyright

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/projects/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 Authentification
HTTPS protocol (SSL)

* Parsers

NQXML (NQXMLStreamParser, NQXMLTreeParser)
Expat (XMLStreamParser, XMLTreeParser)
REXML (REXMLStreamParser)
xml-scan (XMLScanStreamParser)
Fastest parser is Expat's 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 Client interface

Choosing a different XML Parser or XML Writer

The examples above all use the default parser (which is now since 1.8 REXMLStreamParser) and a default XML writer. If you want to use a different XML parser, then you have to call the <i>set_parser</i> method of XMLRPC::Client instances or instances of subclasses of XMLRPC::BasicServer or by editing xmlrpc/config.rb.

Client Example:

# ...
server = XMLRPC::Client.new( "xmlrpc-c.sourceforge.net", "/api/sample.php")
server.set_parser(XMLRPC::XMLParser::XMLParser.new)
# ...

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 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, XMLStreamParser is ~350 (!) times faster than NQXMLTreeParser and still ~18 times as fast as XMLTreeParser.

You can change the XML-writer by calling method <i>set_writer</i>.

参考

サブライブラリ

xmlrpc/client	XML-RPC クライアントのためのライブラリです。
xmlrpc/config
xmlrpc/datetime
xmlrpc/server	XML-RPC サーバのためのライブラリです。