1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
|
# xmlrpc/client.rb
# Copyright (C) 2001, 2002, 2003 by Michael Neumann (mneumann@ntecs.de)
#
# Released under the same term of license as Ruby.
#
# History
# $Id$
#
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.
#
# 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.
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
# 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 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 = net_http(@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.request_post(@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.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}"
elsif expected != "<unknown>" and expected.to_i != data.bytesize and resp["Transfer-Encoding"].nil?
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
|