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# xmlrpc/client.rb
# Copyright (C) 2001, 2002, 2003 by Michael Neumann (mneumann@ntecs.de)
#
# Released under the same term of license as Ruby.
#
# History
# $Id: client.rb 53935 2016-02-25 10:29:39Z usa $
#
require "xmlrpc/parser"
require "xmlrpc/create"
require "xmlrpc/config"
require "xmlrpc/utils" # ParserWriterChooseMixin
require "net/http"
require "uri"
module XMLRPC # :nodoc:
# 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 XMLRPC::Client#call or 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.
#
# 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 Client
USER_AGENT = "XMLRPC::Client (Ruby #{RUBY_VERSION})"
include ParserWriterChooseMixin
include ParseContentType
# Creates an object which represents the remote XML-RPC server on the
# given +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 <tt>"/RPC2"</tt>.
# +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 sent,
# an Authorization header is sent. Currently only Basic Authentication is
# implemented, no Digest.
#
# If +use_ssl+ is set to +true+, communication over SSL is enabled.
#
# Parameter +timeout+ is the time to wait for a XML-RPC response, defaults to 30.
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
@http = net_http(@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
# Creates an object which represents the remote XML-RPC server at the
# given +uri+. The URI should have a host, port, path, user and password.
# Example: https://user:password@host:port/path
#
# Raises an ArgumentError if the +uri+ is invalid,
# or if the protocol isn't http or https.
#
# If a +proxy+ is given it should be in the form of "host:port".
#
# The optional +timeout+ defaults to 30 seconds.
def new2(uri, proxy=nil, timeout=nil)
begin
url = URI(uri)
rescue URI::InvalidURIError => e
raise ArgumentError, e.message, e.backtrace
end
unless URI::HTTP === url
raise ArgumentError, "Wrong protocol specified. Only http or https allowed!"
end
proto = url.scheme
user = url.user
passwd = url.password
host = url.host
port = url.port
path = url.path.empty? ? nil : url.request_uri
proxy_host, proxy_port = (proxy || "").split(":")
proxy_port = proxy_port.to_i if proxy_port
self.new(host, path, port, proxy_host, proxy_port, user, passwd, (proto == "https"), timeout)
end
alias new_from_uri new2
# Receives a Hash and calls XMLRPC::Client.new
# with the corresponding values.
#
# The +hash+ parameter has following case-insensitive keys:
# * host
# * path
# * port
# * proxy_host
# * proxy_port
# * user
# * password
# * use_ssl
# * timeout
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
# Returns the Net::HTTP object for the client. If you want to
# change HTTP client options except header, cookie, timeout,
# user and password, use Net::HTTP directly.
#
# Since 2.1.0.
attr_reader :http
# Add additional HTTP headers to the request
attr_accessor :http_header_extra
# Returns the Net::HTTPResponse object of the last RPC.
attr_reader :http_last_response
# Get and set the HTTP Cookie header.
attr_accessor :cookie
# Return the corresponding attributes.
attr_reader :timeout, :user, :password
# Sets the Net::HTTP#read_timeout and Net::HTTP#open_timeout to
# +new_timeout+
def timeout=(new_timeout)
@timeout = new_timeout
@http.read_timeout = @timeout
@http.open_timeout = @timeout
end
# Changes the user for the Basic Authentication header to +new_user+
def user=(new_user)
@user = new_user
set_auth
end
# Changes the password for the Basic Authentication header to
# +new_password+
def password=(new_password)
@password = new_password
set_auth
end
# Invokes the method named +method+ with the parameters given by
# +args+ on the XML-RPC server.
#
# The +method+ parameter 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 <code>___class___</code> which contains the class name
# for restoring that object later.
#
# The method returns the return-value from the Remote Procedure Call.
#
# The type of the return-value is one of the types shown above.
#
# A Bignum is only allowed when it fits in 32-bit. A XML-RPC
# +dateTime.iso8601+ type is always returned as a XMLRPC::DateTime object.
# Struct is never returned, only a Hash, the same for a Symbol, where as a
# String is always returned. 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+ an Integer, and +faultString+ a String.
def call(method, *args)
ok, param = call2(method, *args)
if ok
param
else
raise param
end
end
# The difference between this method and XMLRPC::Client#call is, that
# this method will <b>NOT</b> raise a XMLRPC::FaultException exception.
#
# The method returns an array of two values. The first value indicates if
# the second value is +true+ or an XMLRPC::FaultException.
#
# Both are explained in XMLRPC::Client#call.
#
# Simple to remember: The "2" in "call2" denotes the number of values it returns.
def call2(method, *args)
request = create().methodCall(method, *args)
data = do_rpc(request, false)
parser().parseMethodResponse(data)
end
# Similar to XMLRPC::Client#call, however can be called concurrently and
# use a new connection for each request. In contrast to the corresponding
# method without the +_async+ suffix, which use connect-alive (one
# connection for all requests).
#
# Note, that you have to use Thread 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)
# }
#
def call_async(method, *args)
ok, param = call2_async(method, *args)
if ok
param
else
raise param
end
end
# Same as XMLRPC::Client#call2, but can be called concurrently.
#
# See also XMLRPC::Client#call_async
def call2_async(method, *args)
request = create().methodCall(method, *args)
data = do_rpc(request, true)
parser().parseMethodResponse(data)
end
# You can use this method to execute several methods on a XMLRPC server
# which support the multi-call extension.
#
# s.multicall(
# ['michael.add', 3, 4],
# ['michael.sub', 4, 5]
# )
# # => [7, -1]
def multicall(*methods)
ok, params = multicall2(*methods)
if ok
params
else
raise params
end
end
# Same as XMLRPC::Client#multicall, but returns two parameters instead of
# raising an XMLRPC::FaultException.
#
# See XMLRPC::Client#call2
def multicall2(*methods)
gen_multicall(methods, false)
end
# Similar to XMLRPC::Client#multicall, however can be called concurrently and
# use a new connection for each request. In contrast to the corresponding
# method without the +_async+ suffix, which use connect-alive (one
# connection for all requests).
#
# Note, that you have to use Thread to call these methods concurrently.
# The following example calls two methods concurrently:
#
# Thread.new {
# p client.multicall_async("michael.add", 4, 5)
# }
#
# Thread.new {
# p client.multicall_async("michael.div", 7, 9)
# }
#
def multicall_async(*methods)
ok, params = multicall2_async(*methods)
if ok
params
else
raise params
end
end
# Same as XMLRPC::Client#multicall2, but can be called concurrently.
#
# See also XMLRPC::Client#multicall_async
def multicall2_async(*methods)
gen_multicall(methods, true)
end
# 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.
def proxy(prefix=nil, *args)
Proxy.new(self, prefix, args, :call)
end
# Almost the same like XMLRPC::Client#proxy only that a call on the returned
# XMLRPC::Client::Proxy object will return two parameters.
#
# See XMLRPC::Client#call2
def proxy2(prefix=nil, *args)
Proxy.new(self, prefix, args, :call2)
end
# Similar to XMLRPC::Client#proxy, however can be called concurrently and
# use a new connection for each request. In contrast to the corresponding
# method without the +_async+ suffix, which use connect-alive (one
# connection for all requests).
#
# Note, that you have to use Thread to call these methods concurrently.
# The following example calls two methods concurrently:
#
# Thread.new {
# p client.proxy_async("michael.add", 4, 5)
# }
#
# Thread.new {
# p client.proxy_async("michael.div", 7, 9)
# }
#
def proxy_async(prefix=nil, *args)
Proxy.new(self, prefix, args, :call_async)
end
# Same as XMLRPC::Client#proxy2, but can be called concurrently.
#
# See also XMLRPC::Client#proxy_async
def proxy2_async(prefix=nil, *args)
Proxy.new(self, prefix, args, :call2_async)
end
private
def net_http(host, port, proxy_host, proxy_port)
Net::HTTP.new host, port, proxy_host, proxy_port
end
def dup_net_http
http = net_http(@http.address,
@http.port,
@http.proxy_address,
@http.proxy_port)
http.proxy_user = @http.proxy_user
http.proxy_pass = @http.proxy_pass
if @http.use_ssl?
http.use_ssl = true
Net::HTTP::SSL_ATTRIBUTES.each do |attribute|
http.__send__("#{attribute}=", @http.__send__(attribute))
end
end
http.read_timeout = @http.read_timeout
http.open_timeout = @http.open_timeout
http
end
def set_auth
if @user.nil?
@auth = nil
else
a = "#@user"
a << ":#@password" if @password != nil
@auth = "Basic " + [a].pack("m0")
end
end
def do_rpc(request, async=false)
header = {
"User-Agent" => USER_AGENT,
"Content-Type" => "text/xml; charset=utf-8",
"Content-Length" => request.bytesize.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
http = dup_net_http
# post request
http.start {
resp = http.request_post(@path, request, header)
}
else
# reuse the HTTP object for each call => connection alive is possible
# we must start connection explicitly 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.request_post(@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
# assume text/xml on instances where Content-Type header is not set
ct_expected = resp["Content-Type"] || 'text/xml'
ct = parse_content_type(ct_expected).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.bytesize == 0
raise "Wrong size. Was #{data.bytesize}, should be #{expected}"
end
parse_set_cookies(resp.get_fields("Set-Cookie"))
return data
end
def parse_set_cookies(set_cookies)
return if set_cookies.nil?
return if set_cookies.empty?
require 'webrick/cookie'
pairs = {}
set_cookies.each do |set_cookie|
cookie = WEBrick::Cookie.parse_set_cookie(set_cookie)
pairs.delete(cookie.name)
pairs[cookie.name] = cookie.value
end
cookies = pairs.collect do |name, value|
WEBrick::Cookie.new(name, value).to_s
end
@cookie = cookies.join("; ")
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
# XML-RPC calls look nicer!
#
# You can call any method onto objects of that class - the object handles
# XMLRPC::Client::Proxy#method_missing and will forward the method call to
# a XML-RPC server.
#
# Don't use this class directly, instead use the public instance method
# XMLRPC::Client#proxy or XMLRPC::Client#proxy2.
#
# 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 Proxy
# Creates an object which provides XMLRPC::Client::Proxy#method_missing.
#
# The given +server+ must be an instance of XMLRPC::Client, which is the
# XML-RPC server to be used for a XML-RPC call.
#
# +prefix+ and +delim+ will be prepended to the method name called onto this object.
#
# An optional parameter +meth+ is the method to use for a RPC.
# It can be either, call, call2, call_async, call2_async
#
# +args+ are arguments which are automatically given to every XML-RPC
# call before being provided through +method_missing+.
def initialize(server, prefix, args=[], meth=:call, delim=".")
@server = server
@prefix = prefix ? prefix + delim : ""
@args = args
@meth = meth
end
# Every method call is forwarded to the XML-RPC server defined in
# XMLRPC::Client::Proxy#new.
#
# Note: Inherited methods from class Object cannot be used as XML-RPC
# names, because they get around +method_missing+.
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