compression

At one point I had a nice little compression utility that smashed my Delphi compiled EXE's to a smaller download size, but now I can't find it. Any recommendations? Also, are there any downsides to using these kinds of utilities? (I mainly use them to shorten download times for rural / dial-up users). Related question: Are there any downsides to using UPX to compress a Windows executable? Years ago I looked into compressing my executable to make the download smaller. What I ended up doing, and what I recommend for you, is to use an installer program like Inno Setup instead. Not only does it

The following code is based on the example given in the javadocs for java.util.zip.Deflater . The only changes I have made is to create a byte array called dict and then set the dictionary on both the Deflater and Inflater instances using the setDictionary(byte[]) method. The problem I'm seeing is that when I call Inflater.setDictionary() with the exact same array as I used for the Deflater, I get an IllegalArgumentException. Here is the code in question: import java.util.zip.Deflater; import java.util.zip.Inflater; public class DeflateWithDictionary { public static void main(String[] args)

I am having issues converting a png to tiff. The conversion goes fine, but the image is huge. I think the issue is that I am not doing the compression correctly? Anyone have any suggestions?? Here is the code sample public static void test() throws IOException { // String fileName = "4958813_1"; String fileName = "4848970_1"; String inFileType = ".PNG"; String outFileType = ".TIFF"; ImageIO.scanForPlugins(); File fInputFile = new File("I:/HPF/UU/" + fileName + inFileType); InputStream fis = new BufferedInputStream(new FileInputStream( fInputFile)); PNGImageReaderSpi spi = new PNGImageReaderSpi

I've setup RMI + SSL. This works great. But it doesn't seem possible to slip compression in between RMI and SSL. So that the RMI requests are compressed before they're sent over SSL. I've seen some posts online suggest using SSLSocketFactory.createSocket() which takes a Socket to wrap SSL over a compressing socket. But that seems like it would try to compress the SSL protocol itself, which probably isn't very compressable. I supposed I should create a Socket proxy (subclass of Socket that defers to another Socket , like FilterOutputStream does). Have the proxy wrap the Input/Ouput streams with

I have a .NET client that needs to connect to a remote SQL Server over the WAN, is it possible to compress SQL traffic between the client and the server? I am using .NET 3.5 and SQL Server 2005 and greater. Looking at the connectionstrings.com here for SQL Server 2008, the database providers do not have some kind of compression scheme...You may need to write a wrapper on a different port, that compresses the data, by using the front end, send the data across that port, from there, compress it, send it across to the remote endpoint, decompress it, and forward it on to the real tcp/ip port where

I want to emulate the functionality of gzcat | tail -n. This would be helpful for times when there are huge files (of a few GB's or so). Can I tail the last few lines of such a file w/o reading it from the beginning? I doubt that this won't be possible since I'd guess for gzip, the encoding would depend on all the previous text. But still I'd like to hear if anyone has tried doing something similar - maybe investigating over a compression algorithm that could provide such a feature. No, you can't. The zipping algorithm works on streams and adapts its internal codings to what the stream