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
|
<?php
/**
* XML-parsing classes to wrap the domxml and DOM extensions for PHP 4
* and 5, respectively.
*
* @package OpenID
*/
/**
* The base class for wrappers for available PHP XML-parsing
* extensions. To work with this Yadis library, subclasses of this
* class MUST implement the API as defined in the remarks for this
* class. Subclasses of Auth_Yadis_XMLParser are used to wrap
* particular PHP XML extensions such as 'domxml'. These are used
* internally by the library depending on the availability of
* supported PHP XML extensions.
*
* @package OpenID
*/
class Auth_Yadis_XMLParser {
/**
* Initialize an instance of Auth_Yadis_XMLParser with some
* XML and namespaces. This SHOULD NOT be overridden by
* subclasses.
*
* @param string $xml_string A string of XML to be parsed.
* @param array $namespace_map An array of ($ns_name => $ns_uri)
* to be registered with the XML parser. May be empty.
* @return boolean $result True if the initialization and
* namespace registration(s) succeeded; false otherwise.
*/
function init($xml_string, $namespace_map)
{
if (!$this->setXML($xml_string)) {
return false;
}
foreach ($namespace_map as $prefix => $uri) {
if (!$this->registerNamespace($prefix, $uri)) {
return false;
}
}
return true;
}
/**
* Register a namespace with the XML parser. This should be
* overridden by subclasses.
*
* @param string $prefix The namespace prefix to appear in XML tag
* names.
*
* @param string $uri The namespace URI to be used to identify the
* namespace in the XML.
*
* @return boolean $result True if the registration succeeded;
* false otherwise.
*/
function registerNamespace($prefix, $uri)
{
// Not implemented.
}
/**
* Set this parser object's XML payload. This should be
* overridden by subclasses.
*
* @param string $xml_string The XML string to pass to this
* object's XML parser.
*
* @return boolean $result True if the initialization succeeded;
* false otherwise.
*/
function setXML($xml_string)
{
// Not implemented.
}
/**
* Evaluate an XPath expression and return the resulting node
* list. This should be overridden by subclasses.
*
* @param string $xpath The XPath expression to be evaluated.
*
* @param mixed $node A node object resulting from a previous
* evalXPath call. This node, if specified, provides the context
* for the evaluation of this xpath expression.
*
* @return array $node_list An array of matching opaque node
* objects to be used with other methods of this parser class.
*/
function &evalXPath($xpath, $node = null)
{
// Not implemented.
}
/**
* Return the textual content of a specified node.
*
* @param mixed $node A node object from a previous call to
* $this->evalXPath().
*
* @return string $content The content of this node.
*/
function content($node)
{
// Not implemented.
}
/**
* Return the attributes of a specified node.
*
* @param mixed $node A node object from a previous call to
* $this->evalXPath().
*
* @return array $attrs An array mapping attribute names to
* values.
*/
function attributes($node)
{
// Not implemented.
}
}
/**
* This concrete implementation of Auth_Yadis_XMLParser implements
* the appropriate API for the 'domxml' extension which is typically
* packaged with PHP 4. This class will be used whenever the 'domxml'
* extension is detected. See the Auth_Yadis_XMLParser class for
* details on this class's methods.
*
* @package OpenID
*/
class Auth_Yadis_domxml extends Auth_Yadis_XMLParser {
function __construct()
{
$this->xml = null;
$this->doc = null;
$this->xpath = null;
$this->errors = array();
}
function setXML($xml_string)
{
$this->xml = $xml_string;
$this->doc = @domxml_open_mem($xml_string, DOMXML_LOAD_PARSING,
$this->errors);
if (!$this->doc) {
return false;
}
$this->xpath = $this->doc->xpath_new_context();
return true;
}
function registerNamespace($prefix, $uri)
{
return xpath_register_ns($this->xpath, $prefix, $uri);
}
function &evalXPath($xpath, $node = null)
{
if ($node) {
$result = @$this->xpath->xpath_eval($xpath, $node);
} else {
$result = @$this->xpath->xpath_eval($xpath);
}
if (!$result) {
$n = array();
return $n;
}
if (!$result->nodeset) {
$n = array();
return $n;
}
return $result->nodeset;
}
function content($node)
{
if ($node) {
return $node->get_content();
}
}
function attributes($node)
{
if ($node) {
$arr = $node->attributes();
$result = array();
if ($arr) {
foreach ($arr as $attrnode) {
$result[$attrnode->name] = $attrnode->value;
}
}
return $result;
}
}
}
/**
* This concrete implementation of Auth_Yadis_XMLParser implements
* the appropriate API for the 'dom' extension which is typically
* packaged with PHP 5. This class will be used whenever the 'dom'
* extension is detected. See the Auth_Yadis_XMLParser class for
* details on this class's methods.
*
* @package OpenID
*/
class Auth_Yadis_dom extends Auth_Yadis_XMLParser {
function __construct()
{
$this->xml = null;
$this->doc = null;
$this->xpath = null;
$this->errors = array();
}
function setXML($xml_string)
{
$this->xml = $xml_string;
$this->doc = new DOMDocument;
if (!$this->doc) {
return false;
}
// libxml_disable_entity_loader (PHP 5 >= 5.2.11)
if (function_exists('libxml_disable_entity_loader') && function_exists('libxml_use_internal_errors')) {
// disable external entities and libxml errors
$loader = libxml_disable_entity_loader(true);
$errors = libxml_use_internal_errors(true);
$parse_result = @$this->doc->loadXML($xml_string);
libxml_disable_entity_loader($loader);
libxml_use_internal_errors($errors);
} else {
$parse_result = @$this->doc->loadXML($xml_string);
}
if (!$parse_result) {
return false;
}
if (isset($this->doc->doctype)) {
return false;
}
$this->xpath = new DOMXPath($this->doc);
if ($this->xpath) {
return true;
} else {
return false;
}
}
function registerNamespace($prefix, $uri)
{
return $this->xpath->registerNamespace($prefix, $uri);
}
function &evalXPath($xpath, $node = null)
{
if ($node) {
$result = @$this->xpath->query($xpath, $node);
} else {
$result = @$this->xpath->query($xpath);
}
$n = array();
if (!$result) {
return $n;
}
for ($i = 0; $i < $result->length; $i++) {
$n[] = $result->item($i);
}
return $n;
}
function content($node)
{
if ($node) {
return $node->textContent;
}
}
function attributes($node)
{
if ($node) {
$arr = $node->attributes;
$result = array();
if ($arr) {
for ($i = 0; $i < $arr->length; $i++) {
$node = $arr->item($i);
$result[$node->nodeName] = $node->nodeValue;
}
}
return $result;
}
}
}
global $__Auth_Yadis_defaultParser;
$__Auth_Yadis_defaultParser = null;
/**
* Set a default parser to override the extension-driven selection of
* available parser classes. This is helpful in a test environment or
* one in which multiple parsers can be used but one is more
* desirable.
*
* @param Auth_Yadis_XMLParser $parser An instance of a
* Auth_Yadis_XMLParser subclass.
*/
function Auth_Yadis_setDefaultParser($parser)
{
global $__Auth_Yadis_defaultParser;
$__Auth_Yadis_defaultParser = $parser;
}
function Auth_Yadis_getSupportedExtensions()
{
return array('dom' => 'Auth_Yadis_dom',
'domxml' => 'Auth_Yadis_domxml');
}
/**
* Returns an instance of a Auth_Yadis_XMLParser subclass based on
* the availability of PHP extensions for XML parsing. If
* Auth_Yadis_setDefaultParser has been called, the parser used in
* that call will be returned instead.
*/
function Auth_Yadis_getXMLParser()
{
global $__Auth_Yadis_defaultParser;
if (isset($__Auth_Yadis_defaultParser)) {
return $__Auth_Yadis_defaultParser;
}
foreach(Auth_Yadis_getSupportedExtensions() as $extension => $classname)
{
if (extension_loaded($extension))
{
$p = new $classname();
Auth_Yadis_setDefaultParser($p);
return $p;
}
}
return false;
}
|