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<?php |
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namespace PhpZip\Model\Extra\Fields; |
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use PhpZip\Exception\ZipException; |
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use PhpZip\Model\Extra\ZipExtraField; |
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use PhpZip\Model\ZipContainer; |
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use PhpZip\Model\ZipEntry; |
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/** |
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* Jar Marker Extra Field. |
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* An executable Java program can be packaged in a JAR file with all the libraries it uses. |
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* Executable JAR files can easily be distinguished from the files packed in the JAR file |
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* by the extra field in the first file, which is hexadecimal in the 0xCAFE bytes series. |
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* If this extra field is added as the very first extra field of |
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* the archive, Solaris will consider it an executable jar file. |
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* |
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* @license MIT |
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*/ |
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class JarMarkerExtraField implements ZipExtraField |
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{ |
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/** @var int Header id. */ |
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const HEADER_ID = 0xCAFE; |
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/** |
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* @param ZipContainer $container |
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*/ |
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public static function setJarMarker(ZipContainer $container) |
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{ |
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$zipEntries = $container->getEntries(); |
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if (!empty($zipEntries)) { |
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foreach ($zipEntries as $zipEntry) { |
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$zipEntry->removeExtraField(self::HEADER_ID); |
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} |
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// set jar execute bit |
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reset($zipEntries); |
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$zipEntry = current($zipEntries); |
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$zipEntry->getCdExtraFields()[] = new self(); |
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} |
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} |
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/** |
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* Returns the Header ID (type) of this Extra Field. |
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* The Header ID is an unsigned short integer (two bytes) |
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* which must be constant during the life cycle of this object. |
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* |
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* @return int |
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*/ |
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public function getHeaderId() |
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{ |
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return self::HEADER_ID; |
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} |
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/** |
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* The actual data to put into local file data - without Header-ID |
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* or length specifier. |
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* |
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* @return string the data |
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*/ |
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1 |
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public function packLocalFileData() |
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{ |
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return ''; |
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} |
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/** |
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* The actual data to put into central directory - without Header-ID or |
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* length specifier. |
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* |
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* @return string the data |
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*/ |
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2 |
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public function packCentralDirData() |
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{ |
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2 |
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return ''; |
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} |
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/** |
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* Populate data from this array as if it was in local file data. |
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* |
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* @param string $buffer the buffer to read data from |
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* @param ZipEntry|null $entry |
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* |
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* @throws ZipException on error |
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* |
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* @return JarMarkerExtraField |
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*/ |
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public static function unpackLocalFileData($buffer, ZipEntry $entry = null) |
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{ |
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if (!empty($buffer)) { |
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throw new ZipException("JarMarker doesn't expect any data"); |
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} |
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return new self(); |
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} |
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/** |
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* Populate data from this array as if it was in central directory data. |
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* |
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* @param string $buffer the buffer to read data from |
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* @param ZipEntry|null $entry |
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* |
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* @throws ZipException on error |
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* |
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* @return JarMarkerExtraField |
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*/ |
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public static function unpackCentralDirData($buffer, ZipEntry $entry = null) |
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{ |
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return self::unpackLocalFileData($buffer, $entry); |
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} |
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/** |
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* @return string |
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*/ |
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public function __toString() |
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{ |
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return sprintf('0x%04x Jar Marker', self::HEADER_ID); |
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} |
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} |
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Ne-Lexa /
php-zip
