summaryrefslogtreecommitdiff
path: root/framework/Util/TRpcClient.php
blob: 91b27b52a88456b3aef0e5e857d9d9da9aee3c88 (plain)
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
<?php

/**
 * @author Robin J. Rogge <rrogge@bigpoint.net>
 * @link http://www.pradosoft.com/
 * @copyright 2010 Bigpoint GmbH
 * @license http://www.pradosoft.com/license/
 * @since 3.2
 * @package System.Util
 */

/**
 * TRpcClient class
 *
 * Note: When using setIsNotification(true), *every* following request is also
 * considered to be a notification until you use setIsNotification(false).
 *
 * Usage:
 *
 * First, you can use the factory:
 * <pre>
 * $_rpcClient = TRpcClient::create('xml', 'http://host/server');
 * $_result = $_rpcClient->remoteMethodName($param, $otherParam);
 * </pre>
 *
 * or as oneliner:
 * <pre>
 * $_result = TRpcClient::create('json', 'http://host/server')->remoteMethod($param, ...);
 * </pre>
 *
 * Second, you can also use the specific implementation directly:
 * <pre>
 * $_rpcClient = new TXmlRpcClient('http://host/server');
 * $_result = $_rpcClient->remoteMethod($param, ...);
 * </pre>
 *
 * or as oneliner:
 * <pre>
 * $_result = TXmlRpcClient('http://host/server')->hello();
 * </pre>
 *
 * @author Robin J. Rogge <rrogge@bigpoint.net>
 * @version $Id$
 * @package System.Util
 * @since 3.2
 */

class TRpcClient extends TApplicationComponent
{
	/**
	 * @var string url of the RPC server
	 */
	private $_serverUrl;

	/**
	 * @var boolean whether the request is a notification and therefore should not care about the result (default: false)
	 */
	private $_isNotification = false;

	// magics

	/**
	 * @param string url to RPC server
	 * @param boolean whether requests are considered to be notifications (completely ignoring the response) (default: false)
	 */
	public function __construct($serverUrl, $isNotification = false)
	{
		$this->_serverUrl = $serverUrl;
		$this->_isNotification = TPropertyValue::ensureBoolean($isNotification);
	}

	// methods

	/**
	 * Creates an instance of the requested RPC client type
	 * @return TRpcClient instance
	 * @throws TApplicationException if an unsupported RPC client type was specified
	 */
	public static function create($type, $serverUrl, $isNotification = false)
	{
		if(($_handler = constant('TRpcClientTypesEnumerable::'.strtoupper($type))) === null)
			throw new TApplicationException('rpcclient_unsupported_handler');

		return new $_handler($serverUrl, $isNotification);
	}

	/**
	 * Creates a stream context resource
	 * @param mixed $content
	 * @param string $contentType mime type
	 */
	protected function createStreamContext($content, $contentType)
	{
		return stream_context_create(array(
			'http' => array(
				'method' => 'POST',
				'header' => "Content-Type: {$contentType}",
				'content' => $content
			)
		));
	}

	/**
	 * Performs the actual request
	 * @param string RPC server URL
	 * @param array payload data
	 * @param string request mime type
	 */
	protected function performRequest($serverUrl, $payload, $mimeType)
	{
		if(($_response = @file_get_contents($serverUrl, false, $this->createStreamContext($payload, $mimeType))) === false)
			throw new TRpcClientRequestException('Request failed ("'.$http_response_header[0].'")');

		return $_response;
	}

	// getter/setter

	/**
	 * @return boolean whether requests are considered to be notifications (completely ignoring the response)
	 */
	public function getIsNotification()
	{
		return $this->_isNotification;
	}

	/**
	 * @param string boolean whether the requests are considered to be notifications (completely ignoring the response) (default: false)
	 */
	public function setIsNotification($bool)
	{
		$this->_isNotification = TPropertyValue::ensureBoolean($bool);
	}

	/**
	 * @return string url of the RPC server
	 */
	public function getServerUrl()
	{
		return $this->_serverUrl;
	}

	/**
	 * @param string url of the RPC server
	 */
	public function setServerUrl($value)
	{
		$this->_serverUrl = $value;
	}
}

/**
 * TRpcClientTypesEnumerable class
 *
 * @author Robin J. Rogge <rrogge@bigpoint.net>
 * @version $Id$
 * @package System.Util
 * @since 3.2
 */

class TRpcClientTypesEnumerable extends TEnumerable
{
	const JSON = 'TJsonRpcClient';
	const XML = 'TXmlRpcClient';
}

/**
 * TRpcClientRequestException class
 *
 * This Exception is fired if the RPC request fails because of transport problems e.g. when
 * there is no RPC server responding on the given remote host.
 *
 * @author Robin J. Rogge <rrogge@bigpoint.net>
 * @version $Id$
 * @package System.Util
 * @since 3.2
 */

class TRpcClientRequestException extends TApplicationException
{
}

/**
 * TRpcClientResponseException class
 *
 * This Exception is fired when the
 *
 * @author Robin J. Rogge <rrogge@bigpoint.net>
 * @version $Id$
 * @package System.Util
 * @since 3.2
 */

class TRpcClientResponseException extends TApplicationException
{
	/**
	 * @param string error message
	 * @param integer error code (optional)
	 */
	public function __construct($errorMessage, $errorCode = null)
	{
		$this->setErrorCode($errorCode);

		parent::__construct($errorMessage);
	}
}

/**
 * TJsonRpcClient class
 *
 * Note: When using setIsNotification(true), *every* following request is also
 * considered to be a notification until you use setIsNotification(false).
 *
 * Usage:
 * <pre>
 * $_rpcClient = new TJsonRpcClient('http://host/server');
 * $_result = $_rpcClient->remoteMethod($param, $otherParam);
 * // or
 * $_result = TJsonRpcClient::create('http://host/server')->remoteMethod($param, $otherParam);
 * </pre>
 *
 * @author Robin J. Rogge <rrogge@bigpoint.net>
 * @version $Id$
 * @package System.Util
 * @since 3.2
 */

class TJsonRpcClient extends TRpcClient
{
	// magics

	/**
	 * @param string RPC method name
	 * @param array RPC method parameters
	 * @return mixed RPC request result
	 * @throws TRpcClientRequestException if the client fails to connect to the server
	 * @throws TRpcClientResponseException if the response represents an RPC fault
	 */
	public function __call($method, $parameters)
	{
		// send request
		$_response = $this->performRequest($this->getServerUrl(), $this->encodeRequest($method, $parameters), 'application/json');

		// skip response handling if the request was just a notification request
		if($this->isNotification)
			return true;

		// decode response
		if(($_response = json_decode($_response, true)) === null)
			throw new TRpcClientResponseException('Empty response received');

		// handle error response
		if(!is_null($_response['error']))
			throw new TRpcClientResponseException($_response['error']);

		return $_response['result'];
	}

	// methods

	/**
	 * @param string method name
	 * @param array method parameters
	 */
	public function encodeRequest($method, $parameters)
	{
		static $_requestId;
		$_requestId = ($_requestId === null) ? 1 : $_requestId + 1;

		return json_encode(array(
			'method' => $method,
			'params' => $parameters,
			'id' => $this->isNotification ? null : $_requestId
		));
	}

	/**
	 * Creates an instance of TJsonRpcClient
	 * @param string url of the rpc server
	 * @param boolean whether the requests are considered to be notifications (completely ignoring the response) (default: false)
	 */
	public static function create($type, $serverUrl, $isNotification = false)
	{
		return new self($serverUrl, $isNotification);
	}
}

/**
 * TXmlRpcClient class
 *
 * Note: When using setIsNotification(true), *every* following request is also
 * considered to be a notification until you use setIsNotification(false).
 *
 * Usage:
 * <pre>
 * $_rpcClient = new TXmlRpcClient('http://remotehost/rpcserver');
 * $_rpcClient->remoteMethod($param, $otherParam);
 * </pre>
 *
 * @author Robin J. Rogge <rrogge@bigpoint.net>
 * @version $Id$
 * @package System.Util
 * @since 3.2
 */

class TXmlRpcClient extends TRpcClient
{
	// magics

	/**
	 * @param string RPC method name
	 * @param array RPC method parameters
	 * @return mixed RPC request result
	 * @throws TRpcClientRequestException if the client fails to connect to the server
	 * @throws TRpcClientResponseException if the response represents an RPC fault
	 */
	public function __call($method, $parameters)
	{
		// send request
		$_response = $this->performRequest($this->getServerUrl(), $this->encodeRequest($method, $parameters), 'text/xml');

		// skip response handling if the request was just a notification request
		if($this->isNotification)
			return true;

		// decode response
		if(($_response = xmlrpc_decode($_response)) === null)
			throw new TRpcClientResponseException('Empty response received');

		// handle error response
		if(xmlrpc_is_fault($_response))
			throw new TRpcClientResponseException($_response['faultString'], $_response['faultCode']);

		return $_response;
	}

	// methods

	/**
	 * @param string method name
	 * @param array method parameters
	 */
	public function encodeRequest($method, $parameters)
	{
		return xmlrpc_encode_request($method, $parameters);
	}

	/**
	 * Creates an instance of TXmlRpcClient
	 * @param string url of the rpc server
	 * @param boolean whether the requests are considered to be notifications (completely ignoring the response) (default: false)
	 */
	public static function create($type, $serverUrl, $isNotification = false)
	{
		return new self($serverUrl, $isNotification);
	}
}