frontend/src/saccubus/util/Cws2Fws.java

   1 package saccubus.util;
   2
   3 import java.io.BufferedInputStream;
   4 import java.io.BufferedOutputStream;
   5 import java.io.File;
   6 import java.io.FileInputStream;
   7 import java.io.FileOutputStream;
   8 import java.io.IOException;
   9 import java.util.logging.Level;
  10 import java.util.logging.Logger;
  11 import java.util.zip.InflaterInputStream;
  12
  13 /**
  14  *
  15  * @author yuki
  16  */
  17 public class Cws2Fws {
  18
  19         private static final String CWS = "CWS";
  20         private static final String FWS = "FWS";
  21
  22         /**
  23          * \88³\8fkSWF\82©\82Ç\82¤\82©\94»\92è\82·\82é.
  24          * @param file \94»\92è\91Î\8fÛ.
  25          * @return \88³\8fkSWF\82Å\82 \82ê\82Îtrue.
  26          */
  27         public static boolean isCws(File file) {
  28                 BufferedInputStream bis = null;
  29                 try {
  30                         bis = new BufferedInputStream(new FileInputStream(file));
  31                         byte header[] = new byte[CWS.length()];
  32                         bis.read(header, 0, header.length);
  33                         if (CWS.equals(new String(header))) {
  34                                 return true;
  35                         }
  36                 } catch (IOException ex) {
  37                         Logger.getLogger(Cws2Fws.class.getName()).log(Level.SEVERE, null, ex);
  38                 } finally {
  39                         if (bis != null) {
  40                                 try {
  41                                         bis.close();
  42                                 } catch (IOException ex) {
  43                                         Logger.getLogger(Cws2Fws.class.getName()).log(Level.SEVERE, null, ex);
  44                                 }
  45                         }
  46                 }
  47                 return false;
  48         }
  49
  50         /**
  51          * \88³\8fkSWF\82ð\93W\8aJ\82·\82é.
  52          * @param in \93W\8aJ\91Î\8fÛ.
  53          * @return \93W\8aJ\8cã\82Ì\83t\83@\83C\83\8b. \91Î\8fÛ\82ª\88³\8fkSWF\82Å\82È\82¯\82ê\82Înull.
  54          */
  55         public static File createFws(File in) {
  56                 if (!isCws(in)) {
  57                         return null;
  58                 }
  59                 File out = new File("fws_tmp.swf");
  60                 BufferedInputStream bis = null;
  61                 BufferedOutputStream bos = null;
  62                 try {
  63                         byte buffer[] = new byte[1024];
  64                         bis = new BufferedInputStream(new FileInputStream(in));
  65                         bis.read(buffer, 0, CWS.length()); // CWS
  66                         bis.read(buffer, 0, 5); // \82»\82Ì\91¼\83w\83b\83_
  67
  68                         bos = new BufferedOutputStream(new FileOutputStream(out));
  69                         bos.write(FWS.getBytes());
  70                         bos.write(buffer);
  71
  72                         InflaterInputStream iis = new InflaterInputStream(bis);
  73                         while (true) {
  74                                 int res = iis.read(buffer);
  75                                 if (res < 0) {
  76                                         break;
  77                                 }
  78                                 bos.write(buffer, 0, res);
  79                         }
  80                         return out;
  81                 } catch (IOException ex) {
  82                         Logger.getLogger(Cws2Fws.class.getName()).log(Level.SEVERE, null, ex);
  83                 } finally {
  84                         if (bis != null) {
  85                                 try {
  86                                         bis.close();
  87                                 } catch (IOException ex) {
  88                                         Logger.getLogger(Cws2Fws.class.getName()).log(Level.SEVERE, null, ex);
  89                                 }
  90                         }
  91                         if (bos != null) {
  92                                 try {
  93                                         bos.close();
  94                                 } catch (IOException ex) {
  95                                         Logger.getLogger(Cws2Fws.class.getName()).log(Level.SEVERE, null, ex);
  96                                 }
  97                         }
  98                 }
  99                 return null;
 100         }
 101 }