ASZip0.2版本解決中文文件名亂碼問題

時間 2019-11-15
標籤 aszip0.2 aszip 版本解決中文文件名亂碼問題简体版
原文原文鏈接
ASZip文件庫是開源的AS3版–Zip壓縮算法，具體示例應用可見http://code.google.com/p/aszip/。目前的最新版本是0.2版。最近在項目中須要用到該第三方類庫來支持Flash對圖片文件的批量打包上傳。因爲是外國友人寫的，因此對中文命名的圖片文件進行壓縮時，就會報錯，只能支持用非中文的命名的圖片文件。 php
下面是我在做者原有代碼的基礎上作了些改進，使其能良好的支持中英文命名的文件，進而對文件打包壓縮。
  
 
   /**   
 
   * This class lets you generate zip files in AS3   
 
   * AS3 implementation of the following PHP script :   
 
   * http://www.zend.com/zend/spotlight/creating-zip-files1.php?article=creating-zip-files1&amp;kind=sl&amp;id=274&amp;open=1&amp;anc=0&amp;view=1   
 
   *   
 
   * @author Thibault Imbert (bytearray.org)   
 
   * @usage Compression methods for the files :   
 
   *   
 
   * CompressionMethod.NONE = no compression is applied   
 
   * CompressionMethod.GZIP = native GZIP compression is applied   
 
   *   
 
   * first parameter : compression method   
 
   *   
 
   * var myZip:ASZIP = new ASZIP ( CompressionMethod.GZIP );   
 
   *   
 
   * @version 0.1 First release   
 
   * @version 0.2 ASZip.saveZIP method added   
 
   */   
 
      
 
   package org.aszip.zip   
 
   {   
 
      
 
   import flash.accessibility.Accessibility;   
 
   import flash.utils.ByteArray;   
 
   import flash.utils.Endian;   
 
   import flash.net.URLRequest;   
 
   import flash.net.URLRequestHeader;   
 
   import flash.net.URLRequestMethod;   
 
   import flash.net.navigateToURL;   
 
   import org.aszip.saving.Method;   
 
   import org.aszip.compression.CompressionMethod;   
 
   import org.aszip.crc.CRC32;   
 
      
 
   /**   
 
   * The ASZip class represents a Zip file   
 
   */   
 
   public class ASZip   
 
      
 
   {   
 
   /**   
 
   * The compressed data buffer   
 
   */   
 
   private var compressedData:ByteArray;   
 
   /**   
 
   * The central directory   
 
   */   
 
   private var centralDirectory:ByteArray;   
 
   /**   
 
   * The central index   
 
   */   
 
   private var oldOffset:Number   
 
   /**   
 
   * Number of directories in the zip   
 
   */   
 
   private var nbDirectory:Array;   
 
   /**   
 
   * The final zip stream   
 
   */   
 
   private var output:ByteArray;   
 
   /**   
 
   * The compression method used   
 
   */   
 
   private var compressionMethod:String;   
 
   /**   
 
   * The comment string   
 
   */   
 
   private var comment:String;   
 
      
 
   /**   
 
   * Lets you create a Zip file   
 
   *   
 
   * @param pCompression Compression method   
 
   * @example   
 
   * This example shows how to create a valid ZIP file :   
 
   * <div>   
 
   * <pre>   
 
   *   
 
   * var myZip:ASZip = new ASZip ( CompressionMethod.GZIP );   
 
   * </pre>   
 
   * </div>   
 
   */   
 
   public function ASZip ( pCompression:String='GZIP' )   
 
      
 
   {   
 
   compressedData = new ByteArray;   
 
   centralDirectory = new ByteArray;   
 
   output = new ByteArray;   
 
   nbDirectory = new Array   
 
   comment = new String;;   
 
   oldOffset = 0;   
 
   compressionMethod = pCompression;   
 
   }   
 
      
 
   /**   
 
   * Lets you create a directory for the current Zip   
 
   *   
 
   * @param directoryName Name of the directory   
 
   * @example   
 
   * This example shows how to create a directory and subdirectory :   
 
   * <div>   
 
   * <pre>   
 
   *   
 
   * myZip.addDirectory ( "images" );   
 
   * myZip.addDirectory ( "images/funk" );   
 
   * </pre>   
 
   * </div>   
 
   */   
 
   public function addDirectory ( directoryName:String ):void   
 
   {   
 
   directoryName = directoryName.split ('\\').join ('/');   
 
      
 
   var feedArrayRow:ByteArray = new ByteArray;   
 
   feedArrayRow.endian = Endian.LITTLE_ENDIAN;   
 
   feedArrayRow.writeUnsignedInt ( 0x04034b50 );   
 
   feedArrayRow.writeShort ( 0x000a );   
 
   feedArrayRow.writeShort ( 0x0000 );   
 
   feedArrayRow.writeShort ( 0x0000 );   
 
   feedArrayRow.writeUnsignedInt ( unixToDos ( new Date().getTime() ) );   
 
      
 
   feedArrayRow.writeUnsignedInt (0);   
 
   feedArrayRow.writeUnsignedInt (0);   
 
   feedArrayRow.writeUnsignedInt (0);   
 
   feedArrayRow.writeShort ( directoryName.length );   
 
   feedArrayRow.writeShort ( 0 );   
 
   feedArrayRow.writeUTFBytes ( directoryName );   
 
      
 
   feedArrayRow.writeUnsignedInt ( 0 );   
 
   feedArrayRow.writeUnsignedInt ( 0 );   
 
   feedArrayRow.writeUnsignedInt ( 0 );   
 
      
 
   compressedData.writeBytes ( feedArrayRow );   
 
      
 
   var newOffset:int = this.compressedData.length;   
 
      
 
   // Directory header   
 
   var addCentralRecord:ByteArray = new ByteArray;   
 
   addCentralRecord.endian = Endian.LITTLE_ENDIAN;   
 
   addCentralRecord.writeUnsignedInt ( 0x02014b50 );   
 
   addCentralRecord.writeShort ( 0x0000 );   
 
   addCentralRecord.writeShort ( 0x000a );   
 
   addCentralRecord.writeShort ( 0x0000 );   
 
   addCentralRecord.writeShort ( 0x0000 );   
 
   addCentralRecord.writeUnsignedInt ( 0x00000000 );   
 
   addCentralRecord.writeUnsignedInt ( 0 );   
 
   addCentralRecord.writeUnsignedInt ( 0 );   
 
   addCentralRecord.writeUnsignedInt ( 0 );   
 
   addCentralRecord.writeShort ( directoryName.length );   
 
   addCentralRecord.writeShort ( 0 );   
 
   addCentralRecord.writeShort ( 0 );   
 
   addCentralRecord.writeShort ( 0 );   
 
   addCentralRecord.writeShort ( 0 );   
 
   addCentralRecord.writeUnsignedInt ( 16 );   
 
   addCentralRecord.writeUnsignedInt ( this.oldOffset );   
 
      
 
   this.oldOffset = newOffset;   
 
      
 
   addCentralRecord.writeUTFBytes (directoryName);   
 
      
 
   this.nbDirectory.push ( addCentralRecord );   
 
   this.centralDirectory.writeBytes ( addCentralRecord );   
 
   }   
 
      
 
   /**   
 
   * Lets you add a file into a specific directory   
 
   *   
 
   * @param pBytes File stream   
 
   * @param pDirectory Directory name   
 
   * @example   
 
   * This example shows how to add files into directories :   
 
   * <div>   
 
   * <pre>   
 
   *   
 
   * myZip.addFile ( imageByteArray, "images/image.jpg" );   
 
   * myZip.addFile ( imageByteArray, "images/funk/image.jpg" );   
 
   * </pre>   
 
   * </div>   
 
   */   
 
   public function addFile ( pBytes:ByteArray, pDirectory:String ):void   
 
   {   
 
   pDirectory = pDirectory.split ('\\').join ('/');   
 
   var pDirectory_byte:* = new ByteArray();   
 
   pDirectory_byte.writeMultiByte(pDirectory, "GBK");   
 
      
 
   var feedArrayRow:ByteArray = new ByteArray;   
 
   feedArrayRow.endian = Endian.LITTLE_ENDIAN;   
 
      
 
   // Local File Header   
 
   feedArrayRow.writeUnsignedInt ( 0x04034b50 );   
 
   feedArrayRow.writeShort ( 0x0014 );   
 
   feedArrayRow.writeShort ( 0x0000 );   
 
      
 
   // File is deflated   
 
   feedArrayRow.writeShort ( this.compressionMethod == CompressionMethod.GZIP ? 0x0008 : 0x0000 );   
 
      
 
   feedArrayRow.writeUnsignedInt ( unixToDos ( new Date().getTime() ) );   
 
      
 
   var uncompressedLength:Number = pBytes.length;   
 
      
 
   // CRC32 checksum   
 
   var crc:CRC32 = new CRC32;   
 
   crc.generateCRC32 ( pBytes );   
 
   var compression:int = crc.getCRC32();   
 
      
 
   // If GZIP compression   
 
   if ( compressionMethod == CompressionMethod.GZIP )   
 
   {   
 
   pBytes.compress();   
 
   var copy:ByteArray = new ByteArray;   
 
   copy.writeBytes ( pBytes, 0, pBytes.length - 4 );   
 
   var finalCopy:ByteArray = new ByteArray;   
 
   finalCopy.writeBytes ( copy, 2 );   
 
   pBytes = finalCopy;   
 
   }   
 
      
 
   var compressedLength:int = pBytes.length;   
 
      
 
   feedArrayRow.writeUnsignedInt ( compression );   
 
   feedArrayRow.writeUnsignedInt ( compressedLength );   
 
   feedArrayRow.writeUnsignedInt ( uncompressedLength );   
 
   feedArrayRow.writeShort ( pDirectory_byte.length );   
 
   feedArrayRow.writeShort ( 0 );   
 
   feedArrayRow.writeBytes ( pDirectory_byte );   
 
   feedArrayRow.writeBytes ( pBytes );   
 
      
 
   // Data Descriptor   
 
   feedArrayRow.writeUnsignedInt ( compression );   
 
   feedArrayRow.writeUnsignedInt ( compressedLength );   
 
   feedArrayRow.writeUnsignedInt ( uncompressedLength );   
 
      
 
   compressedData.writeBytes ( feedArrayRow );   
 
      
 
   var newOffset:int = compressedData.length;   
 
      
 
   // File header   
 
   var addCentralRecord:ByteArray = new ByteArray;   
 
   addCentralRecord.endian = Endian.LITTLE_ENDIAN;   
 
   addCentralRecord.writeUnsignedInt ( 0x02014b50 );   
 
   addCentralRecord.writeShort ( 0x0000 );   
 
   addCentralRecord.writeShort ( 0x0014 );   
 
   addCentralRecord.writeShort ( 0x0000 );   
 
   addCentralRecord.writeShort ( this.compressionMethod == CompressionMethod.GZIP ? 0x0008 : 0x0000 );   
 
   addCentralRecord.writeUnsignedInt ( unixToDos ( new Date().getTime() ) );   
 
   addCentralRecord.writeUnsignedInt ( compression );   
 
   addCentralRecord.writeUnsignedInt ( compressedLength );   
 
   addCentralRecord.writeUnsignedInt ( uncompressedLength );   
 
   addCentralRecord.writeShort(pDirectory_byte.length);   
 
   addCentralRecord.writeShort ( 0 );   
 
   addCentralRecord.writeShort ( 0 );   
 
   addCentralRecord.writeShort ( 0 );   
 
   addCentralRecord.writeShort ( 0 );   
 
   addCentralRecord.writeUnsignedInt( 32 );   
 
      
 
   addCentralRecord.writeUnsignedInt ( this.oldOffset );   
 
   this.oldOffset = newOffset;   
 
      
 
   addCentralRecord.writeBytes ( pDirectory_byte );   
 
      
 
   this.nbDirectory.push ( addCentralRecord );   
 
   this.centralDirectory.writeBytes ( addCentralRecord );   
 
   }   
 
      
 
   /**   
 
   * Lets you add a comment into the Zip file   
 
   *   
 
   * @param pComment The comment string to add   
 
   * @example   
 
   * This example shows how to add a comment for the current zip :   
 
   * <div><pre>myZip.addComment ( "Hello there !");</pre></div>   
 
   */   
 
   public function addComment ( pComment:String ):void   
 
   {   
 
   comment = pComment;   
 
   }   
 
      
 
   /**   
 
   * Lets you finalize and save the ZIP file and make it available for download   
 
   *   
 
   * @param pMethod Can be se to Method.LOCAL, the saveZIP will return the ZIP ByteArray. When Method.REMOTE is passed, just specify the path to the create.php file   
 
   * @param pURL The url of the create.php file   
 
   * @param pDownload Lets you specify the way the ZIP is going to be available. Use Download.INLINE if you want the ZIP to be directly opened, use Download.ATTACHMENT if you want to make it available with a save-as dialog box   
 
   * @param pName The name of the ZIP, only available when Method.REMOTE is used   
 
   * @return The ByteArray ZIP when Method.LOCAL is used, otherwise the method returns null   
 
   * @example   
 
   * This example shows how to save the ZIP with a download dialog-box :   
 
   * <div>   
 
   * <pre>   
 
   *   
 
   * myZIP.saveZIP ( Method.REMOTE, 'create.php', Download.ATTACHMENT, 'archive.zip' );   
 
   * </pre>   
 
   * </div>   
 
   */   
 
   public function saveZIP ( pMethod:String, pURL:String='', pDownload:String='inline', pName:String='archive.zip' ):*   
 
   {   
 
   output = new ByteArray;   
 
   output.endian = Endian.LITTLE_ENDIAN;   
 
   output.writeBytes ( this.compressedData );   
 
   output.writeBytes ( this.centralDirectory );   
 
   output.writeUnsignedInt ( 0x06054b50 );   
 
   output.writeUnsignedInt ( 0x00000000 );   
 
   output.writeShort ( this.nbDirectory.length );   
 
   output.writeShort ( this.nbDirectory.length );   
 
   output.writeUnsignedInt ( this.centralDirectory.length );   
 
   output.writeUnsignedInt ( this.compressedData.length );   
 
   var _loc_3:* = new ByteArray();   
 
   _loc_3.writeMultiByte(comment, "GBK");   
 
   output.writeShort(_loc_3.length);   
 
   output.writeBytes(_loc_3);   
 
      
 
   if ( pMethod == Method.LOCAL ) return output;   
 
      
 
   var header:URLRequestHeader = new URLRequestHeader ("Content-type", "application/octet-stream");   
 
   var myRequest:URLRequest = new URLRequest ( pURL+'?name='+pName+'&amp;method='+pDownload );   
 
   myRequest.requestHeaders.push (header);   
 
   myRequest.method = URLRequestMethod.POST;   
 
   myRequest.data = saveZIP ( Method.LOCAL );   
 
      
 
   navigateToURL ( myRequest, "_blank" );   
 
      
 
   return null;   
 
   }   
 
      
 
   private function unixToDos( pTimeStamp:Number ):Number   
 
   {   
 
   var currentDate:Date = new Date ( pTimeStamp );   
 
      
 
   if ( currentDate.getFullYear() < 1980 ) currentDate = new Date (1980, 1, 1, 0, 0, 0);   
 
      
 
   return ( (currentDate.getFullYear() - 1980) << 25) | (currentDate.getMonth() << 21) | (currentDate.getDate() << 16) |   
 
   (currentDate.getHours() << 11) | (currentDate.getMinutes() << 5) | (currentDate.getSeconds() >> 1);   
 
      
 
   }   
 
      
 
   }   
 
      
 
   }