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=begin
= xmlrpc/client.rb
Copyright (C) 2001, 2002, 2003 by Michael Neumann (mneumann@ntecs.de)
Released under the same term of license as Ruby.
= Classes
* ((<XMLRPC::Client>))
* ((<XMLRPC::Client::Proxy>))
= XMLRPC::Client
== Synopsis
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
== Description
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.
== Class Methods
--- 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.
== Instance Methods
--- 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.
= XMLRPC::Client::Proxy
== Synopsis
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)
== Description
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>)).
== Class Methods
--- 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})).
== Instance Methods
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})).
= History
$Id: client.rb 18091 2008-07-16 17:07:44Z shyouhei $
=end
require "xmlrpc/parser"
require "xmlrpc/create"
require "xmlrpc/config"
require "xmlrpc/utils" # ParserWriterChooseMixin
require "net/http"
module XMLRPC
class Client
USER_AGENT = "XMLRPC::Client (Ruby #{RUBY_VERSION})"
include ParserWriterChooseMixin
include ParseContentType
# Constructors -------------------------------------------------------------------
def initialize(host=nil, path=nil, port=nil, proxy_host=nil, proxy_port=nil,
user=nil, password=nil, use_ssl=nil, timeout=nil)
@http_header_extra = nil
@http_last_response = nil
@cookie = nil
@host = host || "localhost"
@path = path || "/RPC2"
@proxy_host = proxy_host
@proxy_port = proxy_port
@proxy_host ||= 'localhost' if @proxy_port != nil
@proxy_port ||= 8080 if @proxy_host != nil
@use_ssl = use_ssl || false
@timeout = timeout || 30
if use_ssl
require "net/https"
@port = port || 443
else
@port = port || 80
end
@user, @password = user, password
set_auth
# convert ports to integers
@port = @port.to_i if @port != nil
@proxy_port = @proxy_port.to_i if @proxy_port != nil
# HTTP object for synchronous calls
Net::HTTP.version_1_2
@http = Net::HTTP.new(@host, @port, @proxy_host, @proxy_port)
@http.use_ssl = @use_ssl if @use_ssl
@http.read_timeout = @timeout
@http.open_timeout = @timeout
@parser = nil
@create = nil
end
class << self
def new2(uri, proxy=nil, timeout=nil)
if match = /^([^:]+):\/\/(([^@]+)@)?([^\/]+)(\/.*)?$/.match(uri)
proto = match[1]
user, passwd = (match[3] || "").split(":")
host, port = match[4].split(":")
path = match[5]
if proto != "http" and proto != "https"
raise "Wrong protocol specified. Only http or https allowed!"
end
else
raise "Wrong URI as parameter!"
end
proxy_host, proxy_port = (proxy || "").split(":")
self.new(host, path, port, proxy_host, proxy_port, user, passwd, (proto == "https"), timeout)
end
alias new_from_uri new2
def new3(hash={})
# convert all keys into lowercase strings
h = {}
hash.each { |k,v| h[k.to_s.downcase] = v }
self.new(h['host'], h['path'], h['port'], h['proxy_host'], h['proxy_port'], h['user'], h['password'],
h['use_ssl'], h['timeout'])
end
alias new_from_hash new3
end
# Attribute Accessors -------------------------------------------------------------------
# add additional HTTP headers to the request
attr_accessor :http_header_extra
# makes last HTTP response accessible
attr_reader :http_last_response
# Cookie support
attr_accessor :cookie
attr_reader :timeout, :user, :password
def timeout=(new_timeout)
@timeout = new_timeout
@http.read_timeout = @timeout
@http.open_timeout = @timeout
end
def user=(new_user)
@user = new_user
set_auth
end
def password=(new_password)
@password = new_password
set_auth
end
# Call methods --------------------------------------------------------------
def call(method, *args)
ok, param = call2(method, *args)
if ok
param
else
raise param
end
end
def call2(method, *args)
request = create().methodCall(method, *args)
data = do_rpc(request, false)
parser().parseMethodResponse(data)
end
def call_async(method, *args)
ok, param = call2_async(method, *args)
if ok
param
else
raise param
end
end
def call2_async(method, *args)
request = create().methodCall(method, *args)
data = do_rpc(request, true)
parser().parseMethodResponse(data)
end
# Multicall methods --------------------------------------------------------------
def multicall(*methods)
ok, params = multicall2(*methods)
if ok
params
else
raise params
end
end
def multicall2(*methods)
gen_multicall(methods, false)
end
def multicall_async(*methods)
ok, params = multicall2_async(*methods)
if ok
params
else
raise params
end
end
def multicall2_async(*methods)
gen_multicall(methods, true)
end
# Proxy generating methods ------------------------------------------
def proxy(prefix=nil, *args)
Proxy.new(self, prefix, args, :call)
end
def proxy2(prefix=nil, *args)
Proxy.new(self, prefix, args, :call2)
end
def proxy_async(prefix=nil, *args)
Proxy.new(self, prefix, args, :call_async)
end
def proxy2_async(prefix=nil, *args)
Proxy.new(self, prefix, args, :call2_async)
end
private # ----------------------------------------------------------
def set_auth
if @user.nil?
@auth = nil
else
a = "#@user"
a << ":#@password" if @password != nil
@auth = ("Basic " + [a].pack("m")).chomp
end
end
def do_rpc(request, async=false)
header = {
"User-Agent" => USER_AGENT,
"Content-Type" => "text/xml; charset=utf-8",
"Content-Length" => request.size.to_s,
"Connection" => (async ? "close" : "keep-alive")
}
header["Cookie"] = @cookie if @cookie
header.update(@http_header_extra) if @http_header_extra
if @auth != nil
# add authorization header
header["Authorization"] = @auth
end
resp = nil
@http_last_response = nil
if async
# use a new HTTP object for each call
Net::HTTP.version_1_2
http = Net::HTTP.new(@host, @port, @proxy_host, @proxy_port)
http.use_ssl = @use_ssl if @use_ssl
http.read_timeout = @timeout
http.open_timeout = @timeout
# post request
http.start {
resp = http.post2(@path, request, header)
}
else
# reuse the HTTP object for each call => connection alive is possible
# we must start connection explicitely first time so that http.request
# does not assume that we don't want keepalive
@http.start if not @http.started?
# post request
resp = @http.post2(@path, request, header)
end
@http_last_response = resp
data = resp.body
if resp.code == "401"
# Authorization Required
raise "Authorization failed.\nHTTP-Error: #{resp.code} #{resp.message}"
elsif resp.code[0,1] != "2"
raise "HTTP-Error: #{resp.code} #{resp.message}"
end
ct = parse_content_type(resp["Content-Type"]).first
if ct != "text/xml"
if ct == "text/html"
raise "Wrong content-type (received '#{ct}' but expected 'text/xml'): \n#{data}"
else
raise "Wrong content-type (received '#{ct}' but expected 'text/xml')"
end
end
expected = resp["Content-Length"] || "<unknown>"
if data.nil? or data.size == 0
raise "Wrong size. Was #{data.size}, should be #{expected}"
elsif expected != "<unknown>" and expected.to_i != data.size and resp["Transfer-Encoding"].nil?
raise "Wrong size. Was #{data.size}, should be #{expected}"
end
set_cookies = resp.get_fields("Set-Cookie")
if set_cookies and !set_cookies.empty?
require 'webrick/cookie'
@cookie = set_cookies.collect do |set_cookie|
cookie = WEBrick::Cookie.parse_set_cookie(set_cookie)
WEBrick::Cookie.new(cookie.name, cookie.value).to_s
end.join("; ")
end
return data
end
def gen_multicall(methods=[], async=false)
meth = :call2
meth = :call2_async if async
ok, params = self.send(meth, "system.multicall",
methods.collect {|m| {'methodName' => m[0], 'params' => m[1..-1]} }
)
if ok
params = params.collect do |param|
if param.is_a? Array
param[0]
elsif param.is_a? Hash
XMLRPC::FaultException.new(param["faultCode"], param["faultString"])
else
raise "Wrong multicall return value"
end
end
end
return ok, params
end
class Proxy
def initialize(server, prefix, args=[], meth=:call, delim=".")
@server = server
@prefix = prefix ? prefix + delim : ""
@args = args
@meth = meth
end
def method_missing(mid, *args)
pre = @prefix + mid.to_s
arg = @args + args
@server.send(@meth, pre, *arg)
end
end # class Proxy
end # class Client
end # module XMLRPC