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<?php |
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namespace Box\Spout\Reader\Wrapper; |
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/** |
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* Class XMLReader |
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* Wrapper around the built-in XMLReader |
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* @see \XMLReader |
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* |
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* @package Box\Spout\Reader\Wrapper |
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*/ |
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class XMLReader extends \XMLReader |
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{ |
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use XMLInternalErrorsHelper; |
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const ZIP_WRAPPER = 'zip://'; |
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/** |
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* Opens the XML Reader to read a file located inside a ZIP file. |
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* |
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* @param string $zipFilePath Path to the ZIP file |
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* @param string $fileInsideZipPath Relative or absolute path of the file inside the zip |
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* @return bool TRUE on success or FALSE on failure |
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*/ |
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public function openFileInZip($zipFilePath, $fileInsideZipPath) |
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{ |
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$wasOpenSuccessful = false; |
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$realPathURI = $this->getRealPathURIForFileInZip($zipFilePath, $fileInsideZipPath); |
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// We need to check first that the file we are trying to read really exist because: |
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// - PHP emits a warning when trying to open a file that does not exist. |
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// - HHVM does not check if file exists within zip file (@link https://github.com/facebook/hhvm/issues/5779) |
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if ($this->fileExistsWithinZip($realPathURI)) { |
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$wasOpenSuccessful = $this->open($realPathURI, null, LIBXML_NONET); |
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} |
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return $wasOpenSuccessful; |
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} |
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/** |
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* Returns the real path for the given path components. |
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* This is useful to avoid issues on some Windows setup. |
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* |
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* @param string $zipFilePath Path to the ZIP file |
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* @param string $fileInsideZipPath Relative or absolute path of the file inside the zip |
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* @return string The real path URI |
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*/ |
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public function getRealPathURIForFileInZip($zipFilePath, $fileInsideZipPath) |
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{ |
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return (self::ZIP_WRAPPER . realpath($zipFilePath) . '#' . $fileInsideZipPath); |
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} |
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/** |
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* Returns whether the file at the given location exists |
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* |
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* @param string $zipStreamURI URI of a zip stream, e.g. "zip://file.zip#path/inside.xml" |
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* @return bool TRUE if the file exists, FALSE otherwise |
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*/ |
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protected function fileExistsWithinZip($zipStreamURI) |
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{ |
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$doesFileExists = false; |
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$pattern = '/zip:\/\/([^#]+)#(.*)/'; |
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if (preg_match($pattern, $zipStreamURI, $matches)) { |
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$zipFilePath = $matches[1]; |
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$innerFilePath = $matches[2]; |
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$zip = new \ZipArchive(); |
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if ($zip->open($zipFilePath) === true) { |
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$doesFileExists = ($zip->locateName($innerFilePath) !== false); |
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$zip->close(); |
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} |
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} |
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return $doesFileExists; |
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} |
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/** |
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* Move to next node in document |
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* @see \XMLReader::read |
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* |
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* @return bool TRUE on success or FALSE on failure |
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* @throws \Box\Spout\Reader\Exception\XMLProcessingException If an error/warning occurred |
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*/ |
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public function read() |
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{ |
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$this->useXMLInternalErrors(); |
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$wasReadSuccessful = parent::read(); |
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$this->resetXMLInternalErrorsSettingAndThrowIfXMLErrorOccured(); |
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return $wasReadSuccessful; |
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} |
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/** |
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* Read until the element with the given name is found, or the end of the file. |
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* |
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* @param string $nodeName Name of the node to find |
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* @return bool TRUE on success or FALSE on failure |
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* @throws \Box\Spout\Reader\Exception\XMLProcessingException If an error/warning occurred |
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*/ |
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public function readUntilNodeFound($nodeName) |
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{ |
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do { |
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$wasReadSuccessful = $this->read(); |
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$isNotPositionedOnStartingNode = !$this->isPositionedOnStartingNode($nodeName); |
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} while ($wasReadSuccessful && $isNotPositionedOnStartingNode); |
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return $wasReadSuccessful; |
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} |
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/** |
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* Move cursor to next node skipping all subtrees |
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* @see \XMLReader::next |
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* |
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* @param string|void $localName The name of the next node to move to |
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* @return bool TRUE on success or FALSE on failure |
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* @throws \Box\Spout\Reader\Exception\XMLProcessingException If an error/warning occurred |
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*/ |
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public function next($localName = null) |
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{ |
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$this->useXMLInternalErrors(); |
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$wasNextSuccessful = parent::next($localName); |
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$this->resetXMLInternalErrorsSettingAndThrowIfXMLErrorOccured(); |
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return $wasNextSuccessful; |
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} |
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/** |
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* @param string $nodeName |
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* @return bool Whether the XML Reader is currently positioned on the starting node with given name |
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*/ |
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public function isPositionedOnStartingNode($nodeName) |
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{ |
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return $this->isPositionedOnNode($nodeName, XMLReader::ELEMENT); |
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} |
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/** |
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* @param string $nodeName |
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* @return bool Whether the XML Reader is currently positioned on the ending node with given name |
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*/ |
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public function isPositionedOnEndingNode($nodeName) |
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{ |
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return $this->isPositionedOnNode($nodeName, XMLReader::END_ELEMENT); |
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} |
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/** |
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* @param string $nodeName |
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* @param int $nodeType |
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* @return bool Whether the XML Reader is currently positioned on the node with given name and type |
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*/ |
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private function isPositionedOnNode($nodeName, $nodeType) |
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{ |
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// In some cases, the node has a prefix (for instance, "<sheet>" can also be "<x:sheet>"). |
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// So if the given node name does not have a prefix, we need to look at the unprefixed name ("localName"). |
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// @see https://github.com/box/spout/issues/233 |
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$hasPrefix = (strpos($nodeName, ':') !== false); |
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$currentNodeName = ($hasPrefix) ? $this->name : $this->localName; |
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return ($this->nodeType === $nodeType && $currentNodeName === $nodeName); |
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} |
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} |
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