Copyright (C) 2001, 2002, 2003 by Michael Neumann (mneumann@ntecs.de)
Released under the same term of license as Ruby.
((<XMLRPC::Client>))
((<XMLRPC::Client::Proxy>))
require "xmlrpc/client"
server = XMLRPC::Client.new("www.ruby-lang.org", "/RPC2", 80)
begin
param = server.call("michael.add", 4, 5)
puts "4 + 5 = #{param}"
rescue XMLRPC::FaultException => e
puts "Error:"
puts e.faultCode
puts e.faultString
end
or
require "xmlrpc/client"
server = XMLRPC::Client.new("www.ruby-lang.org", "/RPC2", 80)
ok, param = server.call2("michael.add", 4, 5)
if ok then
puts "4 + 5 = #{param}"
else
puts "Error:"
puts param.faultCode
puts param.faultString
end
Class (({XMLRPC::Client})) provides remote procedure calls to a XML-RPC server. After setting the connection-parameters with ((<XMLRPC::Client.new>)) which creates a new (({XMLRPC::Client})) instance, you can execute a remote procedure by sending the ((<call|XMLRPC::Client#call>)) or ((<call2|XMLRPC::Client#call2>)) message to this new instance. The given parameters indicate which method to call on the remote-side and of course the parameters for the remote procedure.
— XMLRPC::Client.new( host=nil, path=nil, port=nil, proxy_host=nil, proxy_port=nil, user=nil, password=nil, use_ssl=false, timeout =nil)
Creates an object which represents the remote XML-RPC server on the
given host ((|host|)). If the server is CGI-based, ((|path|)) is the
path to the CGI-script, which will be called, otherwise (in the
case of a standalone server) ((|path|)) should be (({"/RPC2"})).
((|port|)) is the port on which the XML-RPC server listens.
If ((|proxy_host|)) is given, then a proxy server listening at
((|proxy_host|)) is used. ((|proxy_port|)) is the port of the
proxy server.
Default values for ((|host|)), ((|path|)) and ((|port|)) are 'localhost', '/RPC2' and
'80' respectively using SSL '443'.
If ((|user|)) and ((|password|)) are given, each time a request is send,
a Authorization header is send. Currently only Basic Authentification is
implemented no Digest.
If ((|use_ssl|)) is set to (({true})), comunication over SSL is enabled.
Note, that you need the SSL package from RAA installed.
Parameter ((|timeout|)) is the time to wait for a XML-RPC response, defaults to 30.
— XMLRPC::Client.new2( uri, proxy=nil, timeout=nil) — XMLRPC::Client.new_from_uri( uri, proxy=nil, timeout=nil) : uri
URI specifying protocol (http or https), host, port, path, user and password. Example: https://user:password@host:port/path
: proxy
Is of the form "host:port".
: timeout
Defaults to 30.
— XMLRPC::Client.new3( hash={} ) — XMLRPC::Client.new_from_hash( hash={} )
Parameter ((|hash|)) has following case-insensitive keys: * host * path * port * proxy_host * proxy_port * user * password * use_ssl * timeout Calls ((<XMLRPC::Client.new>)) with the corresponding values.
— XMLRPC::Client#call( method, *args )
Invokes the method named ((|method|)) with the parameters given by
((|args|)) on the XML-RPC server.
The parameter ((|method|)) is converted into a (({String})) and should
be a valid XML-RPC method-name.
Each parameter of ((|args|)) must be of one of the following types,
where (({Hash})), (({Struct})) and (({Array})) can contain any of these listed ((:types:)):
* (({Fixnum})), (({Bignum}))
* (({TrueClass})), (({FalseClass})) ((({true})), (({false})))
* (({String})), (({Symbol}))
* (({Float}))
* (({Hash})), (({Struct}))
* (({Array}))
* (({Date})), (({Time})), (({XMLRPC::DateTime}))
* (({XMLRPC::Base64}))
* A Ruby object which class includes XMLRPC::Marshallable (only if Config::ENABLE_MARSHALLABLE is (({true}))).
That object is converted into a hash, with one additional key/value pair "___class___" which contains the class name
for restoring later that object.
The method returns the return-value from the RPC
((-stands for Remote Procedure Call-)).
The type of the return-value is one of the above shown,
only that a (({Bignum})) is only allowed when it fits in 32-bit and
that a XML-RPC (('dateTime.iso8601')) type is always returned as
a ((<(({XMLRPC::DateTime}))|URL:datetime.html>)) object and
a (({Struct})) is never returned, only a (({Hash})), the same for a (({Symbol})), where
always a (({String})) is returned.
A (({XMLRPC::Base64})) is returned as a (({String})) from xmlrpc4r version 1.6.1 on.
If the remote procedure returned a fault-structure, then a
(({XMLRPC::FaultException})) exception is raised, which has two accessor-methods
(({faultCode})) and (({faultString})) of type (({Integer})) and (({String})).
— XMLRPC::Client#call2( method, *args )
The difference between this method and ((<call|XMLRPC::Client#call>)) is, that
this method do ((*not*)) raise a (({XMLRPC::FaultException})) exception.
The method returns an array of two values. The first value indicates if
the second value is a return-value ((({true}))) or an object of type
(({XMLRPC::FaultException})).
Both are explained in ((<call|XMLRPC::Client#call>)).
Simple to remember: The "2" in "call2" denotes the number of values it returns.
— XMLRPC::Client#multicall( *methods )
You can use this method to execute several methods on a XMLRPC server which supports
the multi-call extension.
Example:
s.multicall(
['michael.add', 3, 4],
['michael.sub', 4, 5]
)
# => [7, -1]
— XMLRPC::Client#multicall2( *methods )
Same as ((<XMLRPC::Client#multicall>)), but returns like ((<XMLRPC::Client#call2>)) two parameters
instead of raising an (({XMLRPC::FaultException})).
— XMLRPC::Client#proxy( prefix, *args )
Returns an object of class (({XMLRPC::Client::Proxy})), initialized with
((|prefix|)) and ((|args|)). A proxy object returned by this method behaves
like ((<XMLRPC::Client#call>)), i.e. a call on that object will raise a
(({XMLRPC::FaultException})) when a fault-structure is returned by that call.
— XMLRPC::Client#proxy2( prefix, *args )
Almost the same like ((<XMLRPC::Client#proxy>)) only that a call on the returned
(({XMLRPC::Client::Proxy})) object behaves like ((<XMLRPC::Client#call2>)), i.e.
a call on that object will return two parameters.
— XMLRPC::Client#call_async(…) — XMLRPC::Client#call2_async(…) — XMLRPC::Client#multicall_async(…) — XMLRPC::Client#multicall2_async(…) — XMLRPC::Client#proxy_async(…) — XMLRPC::Client#proxy2_async(…)
In contrast to corresponding methods without "_async", these can be
called concurrently and use for each request a new connection, where the
non-asynchronous counterparts use connection-alive (one connection for all requests)
if possible.
Note, that you have to use Threads to call these methods concurrently.
The following example calls two methods concurrently:
Thread.new {
p client.call_async("michael.add", 4, 5)
}
Thread.new {
p client.call_async("michael.div", 7, 9)
}
— XMLRPC::Client#timeout — XMLRPC::Client#user — XMLRPC::Client#password
Return the corresponding attributes.
— XMLRPC::Client#timeout= (new_timeout) — XMLRPC::Client#user= (new_user) — XMLRPC::Client#password= (new_password)
Set the corresponding attributes.
— XMLRPC::Client#set_writer( writer )
Sets the XML writer to use for generating XML output.
Should be an instance of a class from module (({XMLRPC::XMLWriter})).
If this method is not called, then (({XMLRPC::Config::DEFAULT_WRITER})) is used.
— XMLRPC::Client#set_parser( parser )
Sets the XML parser to use for parsing XML documents.
Should be an instance of a class from module (({XMLRPC::XMLParser})).
If this method is not called, then (({XMLRPC::Config::DEFAULT_PARSER})) is used.
— XMLRPC::Client#cookie — XMLRPC::Client#cookie= (cookieString)
Get and set the HTTP Cookie header.
— XMLRPC::Client#http_header_extra= (additionalHeaders)
Set extra HTTP headers that are included in the request.
— XMLRPC::Client#http_header_extra
Access the via ((<XMLRPC::Client#http_header_extra=>)) assigned header.
— XMLRPC::Client#http_last_response
Returns the (({Net::HTTPResponse})) object of the last RPC.
require "xmlrpc/client"
server = XMLRPC::Client.new("www.ruby-lang.org", "/RPC2", 80)
michael = server.proxy("michael")
michael2 = server.proxy("michael", 4)
# both calls should return the same value '9'.
p michael.add(4,5)
p michael2.add(5)
Class (({XMLRPC::Client::Proxy})) makes XML-RPC calls look nicer! You can call any method onto objects of that class - the object handles (({method_missing})) and will forward the method call to a XML-RPC server. Don’t use this class directly, but use instead method ((<XMLRPC::Client#proxy>)) or ((<XMLRPC::Client#proxy2>)).
— XMLRPC::Client::Proxy.new( server, prefix, args=[], meth=:call, delim=“.” )
Creates an object which provides (({method_missing})).
((|server|)) must be of type (({XMLRPC::Client})), which is the XML-RPC server to be used
for a XML-RPC call. ((|prefix|)) and ((|delim|)) will be prepended to the methodname
called onto this object.
Parameter ((|meth|)) is the method (call, call2, call_async, call2_async) to use for
a RPC.
((|args|)) are arguments which are automatically given
to every XML-RPC call before the arguments provides through (({method_missing})).
Every method call is forwarded to the XML-RPC server defined in ((<new|XMLRPC::Client::Proxy#new>)).
Note: Inherited methods from class (({Object})) cannot be used as XML-RPC names, because they get around (({method_missing})).
$Id: client.rb 25189 2009-10-02 12:04:37Z akr $