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Completed
Pull Request — master (#988)
by Paul
02:33
created

Path::get_home_path()   B

Complexity

Conditions 6
Paths 4

Size

Total Lines 26
Code Lines 15

Duplication

Lines 0
Ratio 0 %

Importance

Changes 6
Bugs 0 Features 0
Metric Value
c 6
b 0
f 0
dl 0
loc 26
rs 8.439
cc 6
eloc 15
nc 4
nop 1
1
<?php
2
3
namespace HM\BackUpWordPress;
4
5
/**
6
 * Manages both the backup path and site root
7
 *
8
 * Handles calculating & protecting the directory that backups will be stored in
9
 * as well as the directory that is being backed up
10
 */
11
class Path {
12
13
	/**
14
	 * The path to the directory that backup files are stored in
15
	 *
16
	 * @var string $this->path
17
	 */
18
	private $path;
19
20
	/**
21
	 * The path to the directory that will be backed up
22
	 *
23
	 * @var string $this->root
24
	 */
25
	private $root;
26
27
	/**
28
	 * The path to the directory that backup files are stored in
29
	 *
30
	 * @var string $this->path
31
	 */
32
	private $custom_path;
33
34
	/**
35
	 * Contains the instantiated Path instance
36
	 *
37
	 * @var Path $this->instance
38
	 */
39
	private static $instance;
40
41
	/**
42
	 * Protected constructor to prevent creating a new instance of the
43
	 * *Singleton* via the `new` operator from outside of this class.
44
	 */
45
	protected function __construct() {}
46
47
	/**
48
	 * Private clone method to prevent cloning of the instance of the
49
	 * *Singleton* instance.
50
	 */
51
	private function __clone() {}
52
53
	/**
54
	 * Private unserialize method to prevent unserializing of the *Singleton*
55
	 * instance.
56
	 */
57
	private function __wakeup() {}
58
59
	/**
60
	 * Returns the *Singleton* instance of this class.
61
	 *
62
	 * @staticvar Path $instance The *Singleton* instances of this class.
63
	 *
64
	 * @return Path The *Singleton* instance.
65
	 */
66
	public static function get_instance() {
67
68
		if ( ! ( self::$instance instanceof Path ) ) {
69
			self::$instance = new Path();
70
		}
71
72
		return self::$instance;
73
	}
74
75
	/**
76
	 * Convenience method for quickly grabbing the path
77
	 */
78
	public static function get_path() {
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Our type inference engine in quite powerful, but sometimes the code does not provide enough clues to go by. In these cases we request you to add a @return annotation as described here.

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79
		return self::get_instance()->get_calculated_path();
80
	}
81
82
	/**
83
	 * Convenience method for quickly grabbing the root
84
	 */
85
	public static function get_root() {
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Documentation introduced by
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Our type inference engine in quite powerful, but sometimes the code does not provide enough clues to go by. In these cases we request you to add a @return annotation as described here.

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86
		return self::get_instance()->get_calculated_root();
87
	}
88
89
	/**
90
	 * Calculate the path to the site "home" directory.
91
	 *
92
	 * The home directory is the path equivalent to the home_url. That is,
93
	 * the path to the true root of the website. In situations where WordPress is
94
	 * installed in a subdirectory the home path is different to ABSPATH
95
	 *
96
	 * @param string $site_path The site_path to use when calculating the home path, defaults to ABSPATH
97
	 */
98
	public static function get_home_path( $site_path = ABSPATH ) {
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The return type could not be reliably inferred; please add a @return annotation.

Our type inference engine in quite powerful, but sometimes the code does not provide enough clues to go by. In these cases we request you to add a @return annotation as described here.

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Coding Style introduced by
get_home_path uses the super-global variable $_SERVER which is generally not recommended.

Instead of super-globals, we recommend to explicitly inject the dependencies of your class. This makes your code less dependent on global state and it becomes generally more testable:

// Bad
class Router
{
    public function generate($path)
    {
        return $_SERVER['HOST'].$path;
    }
}

// Better
class Router
{
    private $host;

    public function __construct($host)
    {
        $this->host = $host;
    }

    public function generate($path)
    {
        return $this->host.$path;
    }
}

class Controller
{
    public function myAction(Request $request)
    {
        // Instead of
        $page = isset($_GET['page']) ? intval($_GET['page']) : 1;

        // Better (assuming you use the Symfony2 request)
        $page = $request->query->get('page', 1);
    }
}
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99
100
		if ( defined( 'HMBKP_ROOT' ) && HMBKP_ROOT ) {
101
			return wp_normalize_path( HMBKP_ROOT );
102
		}
103
104
		$home_path = $site_path;
105
106
		if ( path_in_php_open_basedir( dirname( $site_path ) ) ) {
107
108
			$home    = set_url_scheme( get_option( 'home' ), 'http' );
109
			$siteurl = set_url_scheme( get_option( 'siteurl' ), 'http' );
110
			if ( ! empty( $home ) && 0 !== strcasecmp( $home, $siteurl ) ) {
111
				$wp_path_rel_to_home = str_ireplace( $home, '', $siteurl ); /* $siteurl - $home */
112
				$pos = strripos( str_replace( '\\', '/', $_SERVER['SCRIPT_FILENAME'] ), trailingslashit( $wp_path_rel_to_home ) );
113
				$home_path = substr( $_SERVER['SCRIPT_FILENAME'], 0, $pos );
114
				$home_path = trailingslashit( $home_path );
115
			} else {
116
				$home_path = ABSPATH;
117
			}
118
119
		}
120
121
		return wp_normalize_path( untrailingslashit( $home_path ) );
122
123
	}
124
125
	/**
126
	 * get the calculated path to the directory where backups will be stored
127
	 */
128
	private function get_calculated_path() {
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Documentation introduced by
The return type could not be reliably inferred; please add a @return annotation.

Our type inference engine in quite powerful, but sometimes the code does not provide enough clues to go by. In these cases we request you to add a @return annotation as described here.

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129
130
		// Calculate the path if needed
131
		if ( empty( $this->path ) || ! wp_is_writable( $this->path ) ) {
132
			$this->calculate_path();
133
		}
134
135
		// Ensure the backup directory is protected
136
		$this->protect_path();
137
138
		return wp_normalize_path( $this->path );
139
140
	}
141
142
	/**
143
	 * Set the path directly, overriding the default
144
	 *
145
	 * @param $path
146
	 */
147
	public function set_path( $path ) {
148
149
		$this->custom_path = $path;
150
151
		// Re-calculate the backup path
152
		$this->calculate_path();
153
154
	}
155
156
	/**
157
	 * get the calculated path to the directory that will be backed up
158
	 */
159
	private function get_calculated_root() {
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Documentation introduced by
The return type could not be reliably inferred; please add a @return annotation.

Our type inference engine in quite powerful, but sometimes the code does not provide enough clues to go by. In these cases we request you to add a @return annotation as described here.

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160
161
		$root = self::get_home_path();
162
163
		if ( defined( 'HMBKP_ROOT' ) && HMBKP_ROOT ) {
164
			$root = HMBKP_ROOT;
165
		}
166
167
		if ( $this->root ) {
168
			$root = $this->root;
169
		}
170
171
		return wp_normalize_path( $root );
172
173
	}
174
175
	/**
176
	 * Set the root path directly, overriding the default
177
	 *
178
	 * @param $root
179
	 */
180
	public function set_root( $root ) {
181
		$this->root = $root;
182
	}
183
184
	public function reset_path() {
185
		$this->set_path( false );
186
	}
187
188
	/**
189
	 * Get the path to the default backup location in wp-content
190
	 */
191
	public function get_default_path() {
192
		return trailingslashit( wp_normalize_path( WP_CONTENT_DIR ) ) . 'backupwordpress-' . substr( HMBKP_SECURE_KEY, 0, 10 ) . '-backups';
193
	}
194
195
	/**
196
	 * Get the path to the fallback backup location in uploads
197
	 */
198
	public function get_fallback_path() {
199
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		$upload_dir = wp_upload_dir();
201
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		return trailingslashit( wp_normalize_path( $upload_dir['basedir'] ) ) . 'backupwordpress-' . substr( HMBKP_SECURE_KEY, 0, 10 ) . '-backups';
203
204
	}
205
206
	/**
207
	 * Get the path to the custom backup location if it's been set
208
	 */
209
	public function get_custom_path() {
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Our type inference engine in quite powerful, but sometimes the code does not provide enough clues to go by. In these cases we request you to add a @return annotation as described here.

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210
211
		if ( $this->custom_path ) {
212
			return $this->custom_path;
213
		}
214
215
		if ( defined( 'HMBKP_PATH' ) && wp_is_writable( HMBKP_PATH ) ) {
216
			return HMBKP_PATH;
217
		}
218
219
		return '';
220
221
	}
222
223
	/**
224
	 * Builds an array containing existing backups folders.
225
	 *
226
	 * @return array
227
	 */
228
	public function get_existing_paths() {
229
230
		if ( false === $default = glob( WP_CONTENT_DIR . '/backupwordpress-*-backups', GLOB_ONLYDIR ) ) {
231
			$default = array();
232
		}
233
234
		$upload_dir = wp_upload_dir();
235
236
		if ( false === $fallback = glob( $upload_dir['basedir'] . '/backupwordpress-*-backups', GLOB_ONLYDIR ) ) {
237
			$fallback = array();
238
		}
239
240
		$paths = array_merge( $default, $fallback );
241
242
        $paths = array_map( 'wp_normalize_path', $paths );
243
244
		return $paths;
245
246
	}
247
248
	/**
249
	 * Returns the first existing path if there is one
250
	 *
251
	 * @return string Backup path if found empty string if not
252
	 */
253
	public function get_existing_path() {
254
255
		$paths = $this->get_existing_paths();
256
257
		if ( ! empty( $paths[0] ) ) {
258
			return $paths[0];
259
		}
260
261
		return '';
262
263
	}
264
265
	/**
266
	 * Calculate the backup path and create the directory if it doesn't exist.
267
	 *
268
	 * Tries all possible locations and uses the first one possible
269
	 *
270
	 * @return
271
	 */
272
	public function calculate_path() {
273
274
		$paths = array();
275
276
		// If we have a custom path then try to use it
277
		if ( $this->get_custom_path() ) {
278
			$paths[] = $this->get_custom_path();
279
		}
280
281
		// If there is already a backups directory then try to use that
282
		if ( $this->get_existing_path() ) {
283
			$paths[] = $this->get_existing_path();
284
		}
285
286
		// If not then default to a new directory in wp-content
287
		$paths[] = $this->get_default_path();
288
289
		// If that didn't work then fallback to a new directory in uploads
290
		$paths[] = $this->get_fallback_path();
291
292
		// Loop through possible paths, use the first one that exists/can be created and is writable
293
		foreach ( $paths as $path ) {
294
			if ( wp_mkdir_p( $path ) && wp_is_writable( $path ) ) { // Also handles fixing perms / directory already exists
295
				break;
296
			}
297
		}
298
299
		if ( file_exists( $path ) && wp_is_writable( $path ) ) {
300
			$this->path = $path;
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Bug introduced by
The variable $path seems to be defined by a foreach iteration on line 293. Are you sure the iterator is never empty, otherwise this variable is not defined?

It seems like you are relying on a variable being defined by an iteration:

foreach ($a as $b) {
}

// $b is defined here only if $a has elements, for example if $a is array()
// then $b would not be defined here. To avoid that, we recommend to set a
// default value for $b.


// Better
$b = 0; // or whatever default makes sense in your context
foreach ($a as $b) {
}

// $b is now guaranteed to be defined here.
Loading history...
301
		}
302
303
	}
304
305
	/**
306
	 * Protect the directory that backups are stored in
307
	 *
308
	 * - Adds an index.html file in an attempt to disable directory browsing
309
	 * - Adds a .httaccess file to deny direct access if on Apache
310
	 *
311
	 * @param string $reset
312
	 */
313
	public function protect_path( $reset = 'no' ) {
314
315
		global $is_apache;
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Compatibility Best Practice introduced by
Use of global functionality is not recommended; it makes your code harder to test, and less reusable.

Instead of relying on global state, we recommend one of these alternatives:

1. Pass all data via parameters

function myFunction($a, $b) {
    // Do something
}

2. Create a class that maintains your state

class MyClass {
    private $a;
    private $b;

    public function __construct($a, $b) {
        $this->a = $a;
        $this->b = $b;
    }

    public function myFunction() {
        // Do something
    }
}
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316
317
		// Protect against directory browsing by including an index.html file
318
		$index = $this->path . '/index.html';
319
320
		if ( 'reset' === $reset && file_exists( $index ) ) {
321
			@unlink( $index );
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Security Best Practice introduced by
It seems like you do not handle an error condition here. This can introduce security issues, and is generally not recommended.

If you suppress an error, we recommend checking for the error condition explicitly:

// For example instead of
@mkdir($dir);

// Better use
if (@mkdir($dir) === false) {
    throw new \RuntimeException('The directory '.$dir.' could not be created.');
}
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322
		}
323
324
		if ( ! file_exists( $index ) && wp_is_writable( $this->path ) ) {
325
			file_put_contents( $index, '' );
326
		}
327
328
		$htaccess = $this->path . '/.htaccess';
329
330
		if ( ( 'reset' === $reset ) && file_exists( $htaccess ) ) {
331
			@unlink( $htaccess );
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Security Best Practice introduced by
It seems like you do not handle an error condition here. This can introduce security issues, and is generally not recommended.

If you suppress an error, we recommend checking for the error condition explicitly:

// For example instead of
@mkdir($dir);

// Better use
if (@mkdir($dir) === false) {
    throw new \RuntimeException('The directory '.$dir.' could not be created.');
}
Loading history...
332
		}
333
334
		// Protect the directory with a .htaccess file on Apache servers
335
		if ( $is_apache && function_exists( 'insert_with_markers' ) && ! file_exists( $htaccess ) && wp_is_writable( $this->path ) ) {
336
337
			$contents[] = '# ' . sprintf( __( 'This %s file ensures that other people cannot download your backup files.', 'backupwordpress' ), '.htaccess' );
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Coding Style Comprehensibility introduced by
$contents was never initialized. Although not strictly required by PHP, it is generally a good practice to add $contents = array(); before regardless.

Adding an explicit array definition is generally preferable to implicit array definition as it guarantees a stable state of the code.

Let’s take a look at an example:

foreach ($collection as $item) {
    $myArray['foo'] = $item->getFoo();

    if ($item->hasBar()) {
        $myArray['bar'] = $item->getBar();
    }

    // do something with $myArray
}

As you can see in this example, the array $myArray is initialized the first time when the foreach loop is entered. You can also see that the value of the bar key is only written conditionally; thus, its value might result from a previous iteration.

This might or might not be intended. To make your intention clear, your code more readible and to avoid accidental bugs, we recommend to add an explicit initialization $myArray = array() either outside or inside the foreach loop.

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338
			$contents[] = '';
339
			$contents[] = '<IfModule mod_rewrite.c>';
340
			$contents[] = 'RewriteEngine On';
341
			$contents[] = 'RewriteCond %{QUERY_STRING} !key=' . HMBKP_SECURE_KEY;
342
			$contents[] = 'RewriteRule (.*) - [F]';
343
			$contents[] = '</IfModule>';
344
			$contents[] = '';
345
346
			file_put_contents( $htaccess, '' );
347
348
			insert_with_markers( $htaccess, 'BackUpWordPress', $contents );
349
350
		}
351
352
	}
353
354
	/**
355
	 * If we have more than one path then move any existing backups to the current path and remove them
356
	 */
357
	public function merge_existing_paths() {
358
359
		$paths = $this->get_existing_paths();
360
361
		if ( ( $paths && $this->get_custom_path() ) || count( $paths ) > 1 ) {
0 ignored issues
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Bug Best Practice introduced by
The expression $paths of type array is implicitly converted to a boolean; are you sure this is intended? If so, consider using ! empty($expr) instead to make it clear that you intend to check for an array without elements.

This check marks implicit conversions of arrays to boolean values in a comparison. While in PHP an empty array is considered to be equal (but not identical) to false, this is not always apparent.

Consider making the comparison explicit by using empty(..) or ! empty(...) instead.

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362
			foreach ( $paths as $old_path ) {
363
				$this->move_old_backups( $old_path );
364
			}
365
		}
366
367
	}
368
369
	/**
370
	 * Move backup files from an existing directory and the new
371
	 * location
372
	 *
373
	 * @param string $path 	The path to move the backups from
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Bug introduced by
There is no parameter named $path. Was it maybe removed?

This check looks for PHPDoc comments describing methods or function parameters that do not exist on the corresponding method or function.

Consider the following example. The parameter $italy is not defined by the method finale(...).

/**
 * @param array $germany
 * @param array $island
 * @param array $italy
 */
function finale($germany, $island) {
    return "2:1";
}

The most likely cause is that the parameter was removed, but the annotation was not.

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374
	 */
375
	public function move_old_backups( $from ) {
376
377
		if ( ! is_readable( $from ) ) {
378
			return;
379
		}
380
381
		if ( ! wp_is_writable( Path::get_path() ) ) {
382
			return;
383
		}
384
385
		// Move any existing backups
386
		if ( $handle = opendir( $from ) ) {
387
388
			// Loop through the backup directory
389
			while ( false !== ( $file = readdir( $handle ) ) ) {
390
391
				// Find all zips
392
				if ( 'zip' === pathinfo( $file, PATHINFO_EXTENSION ) ) {
393
394
					// Try to move them
395
					if ( ! @rename( trailingslashit( $from ) . $file, trailingslashit( Path::get_path() ) . $file ) ) {
396
397
398
						// If we can't move them then try to copy them
399
						copy( trailingslashit( $from ) . $file, trailingslashit( Path::get_path() ) . $file );
400
401
					}
402
403
				}
404
			}
405
406
			closedir( $handle );
407
408
		}
409
410
		// Delete the old directory if it's inside WP_CONTENT_DIR
411
		if ( false !== strpos( $from, WP_CONTENT_DIR ) && $from !== Path::get_path() ) {
412
			rmdirtree( $from );
413
		}
414
415
	}
416
417
	/**
418
	 * Clean any temporary / incomplete backups from the backups directory
419
	 */
420
	public function cleanup() {
421
422
		// Don't cleanup a custom path, who knows what other stuff is there
423
		if ( Path::get_path() === $this->get_custom_path() ) {
424
			return;
425
		}
426
427
		foreach ( new CleanUpIterator( new \DirectoryIterator( $this->path ) ) as $file ) {
428
429
			if ( $file->isDot() || ! $file->isReadable() || ! $file->isFile() ) {
430
				continue;
431
			}
432
433
			@unlink( $file->getPathname() );
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Security Best Practice introduced by
It seems like you do not handle an error condition here. This can introduce security issues, and is generally not recommended.

If you suppress an error, we recommend checking for the error condition explicitly:

// For example instead of
@mkdir($dir);

// Better use
if (@mkdir($dir) === false) {
    throw new \RuntimeException('The directory '.$dir.' could not be created.');
}
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434
435
		}
436
437
	}
438
439
}
440
441
class CleanUpIterator extends \FilterIterator {
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Coding Style Compatibility introduced by
PSR1 recommends that each class should be in its own file to aid autoloaders.

Having each class in a dedicated file usually plays nice with PSR autoloaders and is therefore a well established practice. If you use other autoloaders, you might not want to follow this rule.

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442
443
	// Don't match index.html,files with zip extension or status logfiles.
444
	public function accept() {
445
		return ! preg_match( '/(index\.html|.*\.zip|.*-running)/', $this->current() );
446
	}
447
}
448