// -creatediff -applydiff -debug -output file
public static void main(String[] args) throws IOException {
boolean diff = true;
boolean minimal = true;
String outputFile = "out.jardiff";
for (int counter = 0; counter < args.length; counter++) {
// for backward compatibilty with 1.0.1/1.0
if (args[counter].equals("-nonminimal") || args[counter].equals("-n")) {
minimal = false;
} else if (args[counter].equals("-creatediff") || args[counter].equals("-c")) {
diff = true;
} else if (args[counter].equals("-applydiff") || args[counter].equals("-a")) {
diff = false;
} else if (args[counter].equals("-debug") || args[counter].equals("-d")) {
_debug = true;
} else if (args[counter].equals("-output") || args[counter].equals("-o")) {
if (++counter < args.length) {
outputFile = args[counter];
}
} else if (args[counter].equals("-applydiff") || args[counter].equals("-a")) {
diff = false;
} else {
if ((counter + 2) != args.length) {
showHelp();
System.exit(0);
}
if (diff) {
try {
OutputStream os = new FileOutputStream(outputFile);
JarDiff.createPatch(args[counter], args[counter + 1], os, minimal);
os.close();
} catch (IOException ioe) {
try {
System.out.println(getResources().getString("jardiff.error.create") + " " + ioe);
} catch (MissingResourceException mre) {
}
}
} else {
try {
OutputStream os = new FileOutputStream(outputFile);
new JarDiffPatcher().applyPatch(null, args[counter], args[counter + 1], os);
os.close();
} catch (IOException ioe) {
try {
System.out.println(getResources().getString("jardiff.error.apply") + " " + ioe);
} catch (MissingResourceException mre) {
}
}
}
System.exit(0);
}
}
showHelp();
}
private File generateJarDiff(
ResourceCatalog catalog,
DownloadRequest dreq,
JnlpResource res,
boolean doJarDiffWorkAround) {
boolean del_old = false;
boolean del_new = false;
// Lookup up file for request version
DownloadRequest fromDreq = dreq.getFromDownloadRequest();
try {
JnlpResource fromRes = catalog.lookupResource(fromDreq);
/* Get file locations */
String newFilePath = _servletContext.getRealPath(res.getPath());
String oldFilePath = _servletContext.getRealPath(fromRes.getPath());
// fix for 4720897
if (newFilePath == null) {
newFilePath = getRealPath(res.getPath());
if (newFilePath != null) del_new = true;
}
if (oldFilePath == null) {
oldFilePath = getRealPath(fromRes.getPath());
if (oldFilePath != null) del_old = true;
}
if (newFilePath == null || oldFilePath == null) {
return null;
}
// Create temp. file to store JarDiff file in
File tempDir = (File) _servletContext.getAttribute("javax.servlet.context.tempdir");
// fix for 4653036: JarDiffHandler() should use javax.servlet.context.tempdir to store the
// jardiff
File outputFile = File.createTempFile("jnlp", ".jardiff", tempDir);
_log.addDebug(
"Generating Jardiff between "
+ oldFilePath
+ " and "
+ newFilePath
+ " Store in "
+ outputFile);
// Generate JarDiff
OutputStream os = new FileOutputStream(outputFile);
JarDiff.createPatch(oldFilePath, newFilePath, os, !doJarDiffWorkAround);
os.close();
try {
// Check that Jardiff is smaller, or return null
if (outputFile.length() >= (new File(newFilePath).length())) {
_log.addDebug("JarDiff discarded - since it is bigger");
return null;
}
// Check that Jardiff is smaller than the packed version of
// the new file, if the file exists at all
File newFilePacked = new File(newFilePath + ".pack.gz");
if (newFilePacked.exists()) {
_log.addDebug("generated jardiff size: " + outputFile.length());
_log.addDebug("packed requesting file size: " + newFilePacked.length());
if (outputFile.length() >= newFilePacked.length()) {
_log.addDebug("JarDiff discarded - packed version of requesting file is smaller");
return null;
}
}
_log.addDebug("JarDiff generation succeeded");
return outputFile;
} finally {
// delete the temporarily downloaded file
if (del_new) {
new File(newFilePath).delete();
}
if (del_old) {
new File(oldFilePath).delete();
}
}
} catch (IOException ioe) {
_log.addDebug("Failed to genereate jardiff", ioe);
return null;
} catch (ErrorResponseException ere) {
_log.addDebug("Failed to genereate jardiff", ere);
return null;
}
}