Re: transfer binary files over network

From:

Roedy Green <see_website@mindprod.com.invalid>

Newsgroups:

comp.lang.java.programmer

Date:

Sat, 01 Sep 2007 14:29:15 GMT

Message-ID:

<7otid3ld03hmthfminhdd5t31gsq83oe3n@4ax.com>

On Sat, 01 Sep 2007 16:12:31 +0200, _kOws <kows@wanadoo.fr> wrote,
quoted or indirectly quoted someone who said :

.........
Socket socket = new Socket(host, port);
BufferedReader is = new BufferedReader(new
InputStreamReader(socket.getInputStream());
byte[] buffer = new byte[1000];
while(true){
is.read(buffer);
//append the buffer to a new file

           url = new URL( "snippets/ser/" + snippetName + ".ser" );
            System.out.println( "fetching: " + url );
            URLConnection urlc = url.openConnection();
            if ( urlc == null )
                {
                throw new IOException(
                        "\007ailed to connect to document server." );
                }
            urlc.setAllowUserInteraction( false );
            urlc.setDoInput( true );
            urlc.setDoOutput( false );
            urlc.setUseCaches( false );
            urlc.connect();
            InputStream is = urlc.getInputStream();
            GZIPInputStream gzis =
                    new GZIPInputStream( is, 4096/* buffsize */ );
            ois = new ObjectInputStream( gzis );

            // R E A D, footprintversion, footprint, tokens
            long expectedVersion = Footprint.serialVersionUID;
            long fileVersion = (Long) ois.readObject();
            if ( fileVersion != expectedVersion )
                {
                System.err
                        .println( "\007Stale "
                                  + snippetName
                                  + " Version "
                                  + fileVersion
                                  + " should be "
                                  + expectedVersion );
                ois.close();
                tokens = new Token[0];
                return;
                }

            // we have to recompute it with our font metrics, but we
want the
            // totalLines count.
            footprint = (Footprint) ois.readObject();

            tokens = (Token[]) ois.readObject();

            // C L O S E
            ois.close();
            }
        catch ( InvalidClassException e )
            {
            System.err.println( "\007Stale " + snippetName );
            }
        catch ( ClassNotFoundException e )
            {
            System.err
                    .println( "\007Bug: Token class files missing from
jar " + e
                            .getMessage() );
            }
        catch ( IOException e )
            {
            e.printStackTrace();
            System.err
                    .println( "\007Problem getting compacted source
document "

                              + snippetName + " : " + e.getMessage()
);
            }

--
Roedy Green Canadian Mind Products
The Java Glossary
http://mindprod.com