Examples of java.util.zip.GZIPInputStream

java.util.zip.GZIPInputStream
This class implements a stream filter for reading compressed data in the GZIP file format. @see InflaterInputStream @version 1.33, 04/07/06 @author David Connelly

                     
                     if ( encoding != null ){
                       
                       if ( encoding.equalsIgnoreCase( "gzip"  )){
                                          
                         error_stream = new GZIPInputStream( error_stream );
                         
                       }else if ( encoding.equalsIgnoreCase( "deflate" )){
                           
                         error_stream = new InflaterInputStream( error_stream );
                       }
                     }
                     
                    error_str = FileUtil.readInputStreamAsString( error_stream, 256 );
                  }
                  
                  throw( new ResourceDownloaderException( this, "Error on connect for '" + trimForDisplay( url ) + "': " + Integer.toString(response) + " " + http_con.getResponseMessage() + (error_str==null?"":( ": error=" + error_str ))));    
                }
                  
                getRequestProperties( con );
                
                boolean compressed = false;
                
                try{
                  this_mon.enter();
                  
                  input_stream = con.getInputStream();
                  
                  String encoding = con.getHeaderField( "content-encoding");
                   
                   if ( encoding != null ){
                     
                     if ( encoding.equalsIgnoreCase( "gzip"  )){
  
                       compressed = true;
                                          
                       input_stream = new GZIPInputStream( input_stream );
                       
                     }else if ( encoding.equalsIgnoreCase( "deflate" )){
  
                       compressed = true;

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         // System.out.println( "encoding = " + encoding );
         
         if ( gzip ){
           
           is = new GZIPInputStream( is );
         }
         
           // there are some trackers out there that don't set content length correctly
           // so we can't reliably use it :(

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    if ( encoding != null ){


      if ( encoding.equalsIgnoreCase( "gzip" )){


        in = new GZIPInputStream( in );


      }else if ( encoding.equalsIgnoreCase( "deflate" )){


        in = new InflaterInputStream( in );
      }

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        Header contentEncoding =
                httpMethod.getResponseHeader(HTTPConstants.HEADER_CONTENT_ENCODING);
        if (contentEncoding != null) {
            if (contentEncoding.getValue().
                    equalsIgnoreCase(HTTPConstants.COMPRESSION_GZIP)) {
                in = new GZIPInputStream(in);
                // If the content-encoding is identity we can basically ignore it.
            } else if (!"identity".equalsIgnoreCase(contentEncoding.getValue())) {
                throw new AxisFault("HTTP :" + "unsupported content-encoding of '"
                        + contentEncoding.getValue() + "' found");
            }

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  protected void extractGZip(String in, String out) throws Exception {


    File f = new File(in);
    FileInputStream fileInputHandle = new FileInputStream(f);


    InputStream inputHandle = new GZIPInputStream(fileInputHandle);


    OutputStream outputHandle;
    outputHandle = new FileOutputStream(out);


    byte [] buffer = new byte [1<<14];


    int ret = inputHandle.read(buffer);
    while (ret >= 1) {
      outputHandle.write(buffer,0,ret);
      ret = inputHandle.read(buffer);
    }


    inputHandle.close();
    outputHandle.close();


    outputHandle = null;
    inputHandle = null;

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    return new TRECDocumentCollection( file, factory.copy(), descriptors, bufferSize, useGzip );
  }


  private final InputStream openFileStream( String fileName ) throws IOException {
    final InputStream s = new FileInputStream( fileName );
    if ( useGzip ) return new GZIPInputStream( s );
    else return s;
  }

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    pl.start( "Scanning files..." );
    
    // Scan files and retrieve page pointers
    for( String f : file ) {
      p.clear();
      final FastBufferedInputStream fbis = gzipped ? new FastBufferedInputStream( new GZIPInputStream( new FileInputStream( f ) ) ) : new FastBufferedInputStream( new FileInputStream( f ) );
      long position;
      for(;;) {
        position = fbis.position();
        if ( readLine( fbis ) == -1 ) break;
        if ( startsWith( lineBuffer, DOC_MARKER ) ) p.add( position );

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        if ( content_encoding != null ){


          if ( content_encoding.equalsIgnoreCase( "gzip"  )){
               
            target_is = new GZIPInputStream( target_is );
                            
           }else if ( content_encoding.equalsIgnoreCase( "deflate" )){
               
             target_is = new InflaterInputStream( target_is );
           }

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      System.arraycopy( data, 1, to_decode, 0, data.length - 1 );
      
    }else{
      
      GZIPInputStream is = new GZIPInputStream(new ByteArrayInputStream( data, 1, data.length - 1 ));
      
      to_decode = FileUtil.readInputStreamAsByteArray( is );
      
      is.close();
    }
    
    Map res = BDecoder.decode( to_decode );
    
      // remove any injected random seed

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  }


  public static void gunzip(File src, File dst) throws IOException {
    final byte[] b = new byte[(int) Size.OneMeg.bytes()];


    final GZIPInputStream in = new GZIPInputStream(new FileInputStream(src));


    final OutputStream out = new FileOutputStream(dst);


    int length = 0;
    while ((length = in.read(b)) != -1) {
      out.write(b, 0, length);
    }


    in.close();
    out.close();


  }

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