Diffstat (limited to 'backend/php/src/setup/setup_library/class.zipfile.php') (more/less context) (ignore whitespace changes)
| -rw-r--r-- | backend/php/src/setup/setup_library/class.zipfile.php | 212 |
1 files changed, 212 insertions, 0 deletions
diff --git a/backend/php/src/setup/setup_library/class.zipfile.php b/backend/php/src/setup/setup_library/class.zipfile.php new file mode 100644 index 0000000..4bbe779 --- a/dev/null +++ b/backend/php/src/setup/setup_library/class.zipfile.php @@ -0,0 +1,212 @@ +<?php + +/** + * Class to dynamically create a zip file (archive) + * + * @author Rochak Chauhan. Extended by Joel Wan & Mark Slemko + */ + +class createZip { + var $compressedData = array(); + var $centralDirectory = array(); // central directory + var $endOfCentralDirectory = "\x50\x4b\x05\x06\x00\x00\x00\x00"; //end of Central directory record + var $oldOffset = 0; + + /** + * Function to create the directory where the file(s) will be unzipped + * + * @param $directoryName string + * + */ + + function addDirectory($directoryName) { + $directoryName = str_replace("\\", "/", $directoryName); + + $feedArrayRow = "\x50\x4b\x03\x04"; + $feedArrayRow .= "\x0a\x00"; + $feedArrayRow .= "\x00\x00"; + $feedArrayRow .= "\x00\x00"; + $feedArrayRow .= "\x00\x00\x00\x00"; + + $feedArrayRow .= pack("V",0); + $feedArrayRow .= pack("V",0); + $feedArrayRow .= pack("V",0); + $feedArrayRow .= pack("v", strlen($directoryName) ); + $feedArrayRow .= pack("v", 0 ); + $feedArrayRow .= $directoryName; + + $feedArrayRow .= pack("V",0); + $feedArrayRow .= pack("V",0); + $feedArrayRow .= pack("V",0); + + $this -> compressedData[] = $feedArrayRow; + + $newOffset = strlen(implode("", $this->compressedData)); + + $addCentralRecord = "\x50\x4b\x01\x02"; + $addCentralRecord .="\x00\x00"; + $addCentralRecord .="\x0a\x00"; + $addCentralRecord .="\x00\x00"; + $addCentralRecord .="\x00\x00"; + $addCentralRecord .="\x00\x00\x00\x00"; + $addCentralRecord .= pack("V",0); + $addCentralRecord .= pack("V",0); + $addCentralRecord .= pack("V",0); + $addCentralRecord .= pack("v", strlen($directoryName) ); + $addCentralRecord .= pack("v", 0 ); + $addCentralRecord .= pack("v", 0 ); + $addCentralRecord .= pack("v", 0 ); + $addCentralRecord .= pack("v", 0 ); + $ext = "\x00\x00\x10\x00"; + $ext = "\xff\xff\xff\xff"; + $addCentralRecord .= pack("V", 16 ); + + $addCentralRecord .= pack("V", $this -> oldOffset ); + $this -> oldOffset = $newOffset; + + $addCentralRecord .= $directoryName; + + $this -> centralDirectory[] = $addCentralRecord; + } + + /** + * Function to add file(s) to the specified directory in the archive + * + * @param $directoryName string + * + */ + + function addFile($data, $directoryName) { + + $directoryName = str_replace("\\", "/", $directoryName); + + $feedArrayRow = "\x50\x4b\x03\x04"; + $feedArrayRow .= "\x14\x00"; + $feedArrayRow .= "\x00\x00"; + $feedArrayRow .= "\x08\x00"; + $feedArrayRow .= "\x00\x00\x00\x00"; + + $uncompressedLength = strlen($data); + $compression = crc32($data); + $gzCompressedData = gzcompress($data); + $gzCompressedData = substr( substr($gzCompressedData, 0, strlen($gzCompressedData) - 4), 2); + $compressedLength = strlen($gzCompressedData); + $feedArrayRow .= pack("V",$compression); + $feedArrayRow .= pack("V",$compressedLength); + $feedArrayRow .= pack("V",$uncompressedLength); + $feedArrayRow .= pack("v", strlen($directoryName) ); + $feedArrayRow .= pack("v", 0 ); + $feedArrayRow .= $directoryName; + + $feedArrayRow .= $gzCompressedData; + + $feedArrayRow .= pack("V",$compression); + $feedArrayRow .= pack("V",$compressedLength); + $feedArrayRow .= pack("V",$uncompressedLength); + + $this -> compressedData[] = $feedArrayRow; + + $newOffset = strlen(implode("", $this->compressedData)); + + $addCentralRecord = "\x50\x4b\x01\x02"; + $addCentralRecord .="\x00\x00"; + $addCentralRecord .="\x14\x00"; + $addCentralRecord .="\x00\x00"; + $addCentralRecord .="\x08\x00"; + $addCentralRecord .="\x00\x00\x00\x00"; + $addCentralRecord .= pack("V",$compression); + $addCentralRecord .= pack("V",$compressedLength); + $addCentralRecord .= pack("V",$uncompressedLength); + $addCentralRecord .= pack("v", strlen($directoryName) ); + $addCentralRecord .= pack("v", 0 ); + $addCentralRecord .= pack("v", 0 ); + $addCentralRecord .= pack("v", 0 ); + $addCentralRecord .= pack("v", 0 ); + $addCentralRecord .= pack("V", 32 ); + + $addCentralRecord .= pack("V", $this -> oldOffset ); + $this -> oldOffset = $newOffset; + + $addCentralRecord .= $directoryName; + + $this -> centralDirectory[] = $addCentralRecord; + } + + /** + * Fucntion to return the zip file + * + * @return zipfile (archive) + */ + + function getZippedfile() { + + $data = implode("", $this -> compressedData); + $controlDirectory = implode("", $this -> centralDirectory); + + return + $data. + $controlDirectory. + $this -> endOfCentralDirectory. + pack("v", sizeof($this -> centralDirectory)). + pack("v", sizeof($this -> centralDirectory)). + pack("V", strlen($controlDirectory)). + pack("V", strlen($data)). + "\x00\x00"; + } + + /** + * + * Function to force the download of the archive as soon as it is created + * + * @param archiveName string - name of the created archive file + */ + + function forceDownload($archiveName) { + $headerInfo = ''; + header("Pragma: public"); + header("Expires: 0"); + header("Cache-Control: must-revalidate, post-check=0, pre-check=0"); + header("Cache-Control: private",false); + header("Content-Type: application/zip"); + header("Content-Disposition: attachment; filename=".basename($archiveName).";" ); + header("Content-Transfer-Encoding: binary"); + echo $this->getZippedfile(); + + } + + /** + * Generates zip file from POG package. + * + * @param multi-d array $package + * @param array $paths + */ + function addPOGPackage($package, $paths=array()) + { + + $i = 0; + foreach ($package as $key=>$value) + { + $path = ''; + foreach ($paths as $p) + { + $path .= (($path == '') ? $p : "/$p"); + } + if (strpos($key, ".") == false) + { + $paths[] = $key; + $this->addDirectory((($path == '') ? "$key/" : "$path/$key/")); + $this->addPOGPackage($package[$key], &$paths); + } + else + { + $this->addFile(base64_decode($value), (($path == '') ? $key : "$path/$key")); + } + if ($i == (sizeof($package)-1)) + { + array_pop($paths); + } + $i++; + } + } +} +?>
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