Unzipping A File

WOW. I have done Java inline in CF before, but this is scary. I can only suggest an improvement, but I doubt that it will help much (or even work). Change the buffer implementation like this

var buffer = repeatString(" ", 102400).getBytes();

function copyInputStream(inStream, outStream) {
       var l = inStream.read(buffer);
 
       while(l GTE 0) {
           outStream.write(buffer, 0, l);
           l = inStream.read(buffer);
        }
       inStream.close();
       outStream.close();
    }


I have implemented a high-performance Java-based tool for unzipping and creating huge archives. But it is for sale and I don't know what policies EE has about posting such links. I highly suggest you look around what's available and spend the few dollars others charge for this stuff.

Yeah, that didn't help.

I don't care if I have to buy it, I just want something that works and works consistantly! I've done a lot of searching and haven't found anything yet.  I'm asking you to point me to places even if they require payment.

Thank you!

IF YOU HAVE the java SDK (http://java.sun.com/j2se/1.4.2/download.html - not the JRE!) installed and are not afraid to get your hands dirty with some java compilation, you can try this. All the following instructions assume Windows. First, make sure your java compiler can be executed.

Open command prompt and type: javac

If you get something like 'command not found' make sure that the java SDK installation bin directory is in your path (usually something like C:\j2sdk-1.4.2_32\bin).

Then copy the following code to a text file and save as SimpleCFUnzip.java (spelling matters, or not):

---- Start of Java Code -----

import java.io.*;
import java.util.*;
import java.util.zip.*;

public class SimpleCFUnzip {
      public boolean unzipFile(String zipFilePath, String outputPath) throws Exception {
            ZipFile zipFile = new ZipFile(zipFilePath);
            Enumeration entries = zipFile.entries();
            
            ZipEntry entry = null;
            String nm = null; // name of the file
            File f = null; // folder represented by the path
            BufferedOutputStream out = null;
            if (!(outputPath.endsWith("/") || outputPath.endsWith("/"))) {
                  outputPath += "/";
            }
            
            while(entries.hasMoreElements()) {
                  entry = (ZipEntry)entries.nextElement();
                  
                  if(!entry.isDirectory()) {
                        nm = outputPath + entry.getName();
                        f = new File(nm);
                        out = new BufferedOutputStream(new FileOutputStream(f));
                        copyInputStream(zipFile.getInputStream(entry), out);
                  }
            }
            zipFile.close();
            return true;
      }
      private void copyInputStream(InputStream inStream, OutputStream outStream) throws Exception {
            byte[] buf = new byte[102400];
            int len;
            try {
                  while((len = inStream.read(buf)) > -1) {
                        outStream.write(buf, 0, len);
                  }
            } catch (Exception e) {
                  inStream.close();
                  outStream.close();
                  throw e;
            } finally {
                  inStream.close();
                  outStream.close();
            }
      }
      
}

---- End of Java Code -----

Then open a command prompt in the folder where you saved this file and type:

javac -O SimpleCFUnzip.java

Now there should also be a file SimpleCFUnzip.class - copy this file in the \wwwroot\WEB-INF\lib folder of your ColdFusion installation (usually something like C:\CFusionMX\wwwroot\WEB-INF\lib) and restart ColdFusion.

To use this for unzipping files, this is the CF code:

<cfscript>

unzip = createObject('java', 'SimpleCFUnzip');
unzip.unzipFile( unzipFile , unzipTargetFolder );

</cfscript>

I tested with a 30MB large zip file and it worked fine. Here are the restrictions for this very simple approach:

1) Only handle files in the zip archive that have no folder or path information, just files in the 'root'
2) Performs hardly any error checking whatsoever. It's a good idea to wrap calls to this in a <cftry>-<cfcatch> block and deal with it appropriately
3) It does not create any folders, like the CF version above. You are responsible for all folders to exist

if you want to unzip more than one file, please recreate a new object; that is, do

unzip = createObject('java', 'SimpleCFUnzip');
unzip.unzipFile( unzipFile , unzipTargetFolder );

for each unzip call. In my experience, this is better for memory behavior in the long run.