HTMLPurifier_DefinitionCache_Serializer Class Reference

Inheritance diagram for HTMLPurifier_DefinitionCache_Serializer:

Collaboration diagram for HTMLPurifier_DefinitionCache_Serializer:

Public Member Functions
	add ($def, $config)
	Adds a definition object to the cache.
	set ($def, $config)
	Unconditionally saves a definition object to the cache.
	replace ($def, $config)
	Replace an object in the cache.
	get ($config)
	Retrieves a definition object from the cache.
	remove ($config)
	Removes a definition object to the cache.
	flush ($config)
	Clears all objects from cache.
	cleanup ($config)
	Clears all expired (older version or revision) objects from cache.
	generateFilePath ($config)
	Generates the file path to the serial file corresponding to the configuration and definition name.
	generateDirectoryPath ($config)
	Generates the path to the directory contain this cache's serial files.
	generateBaseDirectoryPath ($config)
	Generates path to base directory that contains all definition type serials.
Public Member Functions inherited from HTMLPurifier_DefinitionCache
	__construct ($type)
	generateKey ($config)
	Generates a unique identifier for a particular configuration.
	isOld ($key, $config)
	Tests whether or not a key is old with respect to the configuration's version and revision number.
	checkDefType ($def)
	Checks if a definition's type jives with the cache's type.

Private Member Functions
	_write ($file, $data, $config)
	Convenience wrapper function for file_put_contents.
	_prepareDir ($config)
	Prepares the directory that this type stores the serials in.
	_testPermissions ($dir, $chmod)
	Tests permissions on a directory and throws out friendly error messages and attempts to chmod it itself if possible.

Additional Inherited Members
Data Fields inherited from HTMLPurifier_DefinitionCache
	$type

Detailed Description

Definition at line 3 of file Serializer.php.

Member Function Documentation

HTMLPurifier_DefinitionCache_Serializer::_prepareDir (   $config )

private

Prepares the directory that this type stores the serials in.

Parameters

$config

Config object

Returns

True if successful

Definition at line 122 of file Serializer.php.

References _testPermissions(), generateBaseDirectoryPath(), and generateDirectoryPath().

Referenced by add(), cleanup(), flush(), replace(), and set().

                                          {
        $directory = $this->generateDirectoryPath($config);
        $chmod = $config->get('Cache.SerializerPermissions');
        if (!$chmod) {
            $chmod = 0755; // invalid config or simpletest
        }
        if (!is_dir($directory)) {
            $base = $this->generateBaseDirectoryPath($config);
            if (!is_dir($base)) {
                trigger_error('Base directory '.$base.' does not exist,
                    please create or change using %Cache.SerializerPath',
                    E_USER_WARNING);
                return false;
            } elseif (!$this->_testPermissions($base, $chmod)) {
                return false;
            }
            $old = umask(0000);
            mkdir($directory, $chmod);
            umask($old);
        } elseif (!$this->_testPermissions($directory, $chmod)) {
            return false;
        }
        return true;
    }

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HTMLPurifier_DefinitionCache_Serializer::_testPermissions (   $dir,   $chmod  )

private

Tests permissions on a directory and throws out friendly error messages and attempts to chmod it itself if possible.

Parameters

$dir	Directory path
$chmod	Permissions

Returns

True if directory writable

Definition at line 154 of file Serializer.php.

Referenced by _prepareDir().

                                                    {
        // early abort, if it is writable, everything is hunky-dory
        if (is_writable($dir)) return true;
        if (!is_dir($dir)) {
            // generally, you'll want to handle this beforehand
            // so a more specific error message can be given
            trigger_error('Directory '.$dir.' does not exist',
                E_USER_WARNING);
            return false;
        }
        if (function_exists('posix_getuid')) {
            // POSIX system, we can give more specific advice
            if (fileowner($dir) === posix_getuid()) {
                // we can chmod it ourselves
                $chmod = $chmod | 0700;
                if (chmod($dir, $chmod)) return true;
            } elseif (filegroup($dir) === posix_getgid()) {
                $chmod = $chmod | 0070;
            } else {
                // PHP's probably running as nobody, so we'll
                // need to give global permissions
                $chmod = $chmod | 0777;
            }
            trigger_error('Directory '.$dir.' not writable, '.
                'please chmod to ' . decoct($chmod),
                E_USER_WARNING);
        } else {
            // generic error message
            trigger_error('Directory '.$dir.' not writable, '.
                'please alter file permissions',
                E_USER_WARNING);
        }
        return false;
    }

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HTMLPurifier_DefinitionCache_Serializer::_write (   $file,   $data,   $config  )

private

Convenience wrapper function for file_put_contents.

Parameters

$file	File name to write to
$data	Data to write into file
$config	Config object

Returns

Number of bytes written if success, or false if failure.

Definition at line 103 of file Serializer.php.

References $file, and $result.

Referenced by add(), replace(), and set().

                                                   {
        $result = file_put_contents($file, $data);
        if ($result !== false) {
            // set permissions of the new file (no execute)
            $chmod = $config->get('Cache.SerializerPermissions');
            if (!$chmod) {
                $chmod = 0644; // invalid config or simpletest
            }
            $chmod = $chmod & 0666;
            chmod($file, $chmod);
        }
        return $result;
    }

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HTMLPurifier_DefinitionCache_Serializer::add	(		$def,
			$config
	)

Adds a definition object to the cache.

Reimplemented from HTMLPurifier_DefinitionCache.

Definition at line 7 of file Serializer.php.

References $file, _prepareDir(), _write(), HTMLPurifier_DefinitionCache\checkDefType(), and generateFilePath().

                                       {
        if (!$this->checkDefType($def)) return;
        $file = $this->generateFilePath($config);
        if (file_exists($file)) return false;
        if (!$this->_prepareDir($config)) return false;
        return $this->_write($file, serialize($def), $config);
    }

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HTMLPurifier_DefinitionCache_Serializer::cleanup

(

$config

)

Clears all expired (older version or revision) objects from cache.

Note

Be carefuly implementing this method as flush. Flush must not interfere with other Definition types, and cleanup() should not be repeatedly called by userland code.

Reimplemented from HTMLPurifier_DefinitionCache.

Definition at line 53 of file Serializer.php.

References $filename, _prepareDir(), generateDirectoryPath(), and HTMLPurifier_DefinitionCache\isOld().

                                     {
        if (!$this->_prepareDir($config)) return false;
        $dir = $this->generateDirectoryPath($config);
        $dh  = opendir($dir);
        while (false !== ($filename = readdir($dh))) {
            if (empty($filename)) continue;
            if ($filename[0] === '.') continue;
            $key = substr($filename, 0, strlen($filename) - 4);
            if ($this->isOld($key, $config)) unlink($dir . '/' . $filename);
        }
    }

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HTMLPurifier_DefinitionCache_Serializer::flush

(

$config

)

Clears all objects from cache.

Reimplemented from HTMLPurifier_DefinitionCache.

Definition at line 42 of file Serializer.php.

References $filename, _prepareDir(), and generateDirectoryPath().

                                   {
        if (!$this->_prepareDir($config)) return false;
        $dir = $this->generateDirectoryPath($config);
        $dh  = opendir($dir);
        while (false !== ($filename = readdir($dh))) {
            if (empty($filename)) continue;
            if ($filename[0] === '.') continue;
            unlink($dir . '/' . $filename);
        }
    }

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HTMLPurifier_DefinitionCache_Serializer::generateBaseDirectoryPath

(

$config

)

Generates path to base directory that contains all definition type serials.

Todo:

Make protected

Definition at line 90 of file Serializer.php.

Referenced by _prepareDir(), and generateDirectoryPath().

                                                       {
        $base = $config->get('Cache.SerializerPath');
        $base = is_null($base) ? HTMLPURIFIER_PREFIX . '/HTMLPurifier/DefinitionCache/Serializer' : $base;
        return $base;
    }

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HTMLPurifier_DefinitionCache_Serializer::generateDirectoryPath

(

$config

)

Generates the path to the directory contain this cache's serial files.

Note

No trailing slash

Todo:

Make protected

Definition at line 80 of file Serializer.php.

References HTMLPurifier_DefinitionCache\$type, and generateBaseDirectoryPath().

Referenced by _prepareDir(), cleanup(), flush(), and generateFilePath().

                                                   {
        $base = $this->generateBaseDirectoryPath($config);
        return $base . '/' . $this->type;
    }

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HTMLPurifier_DefinitionCache_Serializer::generateFilePath

(

$config

)

Generates the file path to the serial file corresponding to the configuration and definition name.

Todo:

Make protected

Definition at line 70 of file Serializer.php.

References generateDirectoryPath(), and HTMLPurifier_DefinitionCache\generateKey().

Referenced by add(), get(), remove(), replace(), and set().

                                              {
        $key = $this->generateKey($config);
        return $this->generateDirectoryPath($config) . '/' . $key . '.ser';
    }

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HTMLPurifier_DefinitionCache_Serializer::get

(

$config

)

Retrieves a definition object from the cache.

Reimplemented from HTMLPurifier_DefinitionCache.

Definition at line 30 of file Serializer.php.

References $file, and generateFilePath().

                                 {
        $file = $this->generateFilePath($config);
        if (!file_exists($file)) return false;
        return unserialize(file_get_contents($file));
    }

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HTMLPurifier_DefinitionCache_Serializer::remove

(

$config

)

Removes a definition object to the cache.

Reimplemented from HTMLPurifier_DefinitionCache.

Definition at line 36 of file Serializer.php.

References $file, and generateFilePath().

                                    {
        $file = $this->generateFilePath($config);
        if (!file_exists($file)) return false;
        return unlink($file);
    }

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HTMLPurifier_DefinitionCache_Serializer::replace	(		$def,
			$config
	)

Replace an object in the cache.

Reimplemented from HTMLPurifier_DefinitionCache.

Definition at line 22 of file Serializer.php.

References $file, _prepareDir(), _write(), HTMLPurifier_DefinitionCache\checkDefType(), and generateFilePath().

                                           {
        if (!$this->checkDefType($def)) return;
        $file = $this->generateFilePath($config);
        if (!file_exists($file)) return false;
        if (!$this->_prepareDir($config)) return false;
        return $this->_write($file, serialize($def), $config);
    }

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HTMLPurifier_DefinitionCache_Serializer::set	(		$def,
			$config
	)

Unconditionally saves a definition object to the cache.

Reimplemented from HTMLPurifier_DefinitionCache.

Definition at line 15 of file Serializer.php.

References $file, _prepareDir(), _write(), HTMLPurifier_DefinitionCache\checkDefType(), and generateFilePath().

                                       {
        if (!$this->checkDefType($def)) return;
        $file = $this->generateFilePath($config);
        if (!$this->_prepareDir($config)) return false;
        return $this->_write($file, serialize($def), $config);
    }

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The documentation for this class was generated from the following file:

• Services/Html/HtmlPurifier/library/HTMLPurifier/DefinitionCache/Serializer.php