diff options
Diffstat (limited to 'khtml/java/org/kde/kjas/server/KJASAppletClassLoader.java')
| -rw-r--r-- | khtml/java/org/kde/kjas/server/KJASAppletClassLoader.java | 360 |
1 files changed, 0 insertions, 360 deletions
diff --git a/khtml/java/org/kde/kjas/server/KJASAppletClassLoader.java b/khtml/java/org/kde/kjas/server/KJASAppletClassLoader.java deleted file mode 100644 index c6defa848..000000000 --- a/khtml/java/org/kde/kjas/server/KJASAppletClassLoader.java +++ /dev/null @@ -1,360 +0,0 @@ -package org.kde.kjas.server; - -import java.net.*; -import java.io.*; -import java.util.*; -import java.util.zip.*; -import java.util.jar.*; -import java.security.*; -/** - * ClassLoader used to download and instantiate Applets. - * <P> - * NOTE: The class loader extends Java 1.2 specific class. - */ -public final class KJASAppletClassLoader - extends URLClassLoader -{ - private static Hashtable loaders = new Hashtable(); - - public static synchronized void removeLoaders() - { - loaders.clear(); - } - - public static synchronized KJASAppletClassLoader getLoader( String docBase, String codeBase, String archives ) - { - SecurityManager security = System.getSecurityManager(); - if (security != null) { - security.checkCreateClassLoader(); - } - URL docBaseURL; - KJASAppletClassLoader loader = null; - try - { - docBaseURL = new URL( docBase ); - - URL codeBaseURL = getCodeBaseURL( docBaseURL, codeBase ); - String key = codeBaseURL.toString(); - if (archives != null) - key += archives; - - Main.debug( "CL: getLoader: key = " + key ); - - loader = (KJASAppletClassLoader) loaders.get( key ); - if( loader == null ) - { - URL [] urlList = {}; - loader = new KJASAppletClassLoader( urlList, docBaseURL, codeBaseURL); - loaders.put( key, loader ); - } - else - { - Main.debug( "CL: reusing classloader" ); - } - } catch( MalformedURLException e ) { Main.kjas_err( "bad DocBase URL", e ); } - return loader; - } - - public static URL getCodeBaseURL( URL docBaseURL, String codeBase ) - { - URL codeBaseURL = null; - try - { - //first determine what the real codeBase is: 3 cases - //#1. codeBase is absolute URL- use that - //#2. codeBase is relative to docBase, create url from those - //#3. last resort, use docBase as the codeBase - if(codeBase != null) - { - //we need to do this since codeBase should be a directory - if( !codeBase.endsWith("/") ) - codeBase = codeBase + "/"; - - try - { - codeBaseURL = new URL( codeBase ); - } catch( MalformedURLException mue ) - { - try - { - codeBaseURL = new URL( docBaseURL, codeBase ); - } catch( MalformedURLException mue2 ) {} - } - } - - if(codeBaseURL == null) - { - //fall back to docBase but fix it up... - String file = docBaseURL.getFile(); - if( file == null || (file.length() == 0) ) - codeBaseURL = docBaseURL; - else if( file.endsWith( "/" ) ) - codeBaseURL = docBaseURL; - else - { - //delete up to the ending '/' - String urlString = docBaseURL.toString(); - int dot_index = urlString.lastIndexOf( '/' ); - String newfile = urlString.substring( 0, dot_index+1 ); - codeBaseURL = new URL( newfile ); - } - } - }catch( Exception e ) { Main.kjas_err( "CL: exception ", e ); } - return codeBaseURL; - } - - public static KJASAppletClassLoader getLoader( String key ) - { - SecurityManager security = System.getSecurityManager(); - if (security != null) { - security.checkCreateClassLoader(); - } - if( loaders.containsKey( key ) ) - return (KJASAppletClassLoader) loaders.get( key ); - - return null; - } - - /********************************************************************************* - ****************** KJASAppletClassLoader Implementation ************************* - **********************************************************************************/ - private URL docBaseURL; - private URL codeBaseURL; - private Vector archives; - private String dbgID; - private static int globalId = 0; - private int myId = 0; - private Vector statusListeners = new Vector(); - private AccessControlContext acc; - // a mapping JS referenced Java objects - private Hashtable jsReferencedObjects = new Hashtable(); - final static RuntimePermission kjas_access = new RuntimePermission("accessClassInPackage.org.kde.kjas.server"); - - public KJASAppletClassLoader( URL[] urlList, URL _docBaseURL, URL _codeBaseURL) - { - super(urlList); - acc = AccessController.getContext(); - synchronized(KJASAppletClassLoader.class) { - myId = ++globalId; - } - docBaseURL = _docBaseURL; - codeBaseURL = _codeBaseURL; - archives = new Vector(); - - dbgID = "CL-" + myId + "(" + codeBaseURL.toString() + "): "; - } - - protected void addURL(URL url) { - Main.debug(this + " add URL: " + url); - super.addURL(url); - } - - public void addStatusListener(StatusListener lsnr) { - statusListeners.add(lsnr); - } - public void removeStatusListener(StatusListener lsnr) { - statusListeners.remove(lsnr); - } - public void showStatus(String msg) { - Enumeration en = statusListeners.elements(); - while (en.hasMoreElements()) { - StatusListener lsnr = (StatusListener)en.nextElement(); - lsnr.showStatus(msg); - } - } - - public void paramsDone() { - // simply builds up the search path - // put the archives first because they are - // cached. - for( int i = 0; i < archives.size(); ++i ) { - String jar = (String)archives.elementAt( i ); - try { - URL jarURL = new URL(codeBaseURL, jar); - addURL(jarURL); - Main.debug("added archive URL \"" + jarURL + "\" to KJASAppletClassLoader"); - } catch (MalformedURLException e) { - Main.kjas_err("Could not construct URL for jar file: " + codeBaseURL + " + " + jar, e); - } - } - // finally add code base url and docbase url - addURL(codeBaseURL); - - // the docBaseURL has to be fixed. - // strip file part from end otherwise this - // will be interpreted as an archive - // (should this perhaps be done generally ??) - String dbs = docBaseURL.toString(); - int idx = dbs.lastIndexOf("/"); - if (idx > 0) { - dbs = dbs.substring(0, idx+1); - } - URL docDirURL = null; - try { - docDirURL = new URL(dbs); - } catch (MalformedURLException e) { - Main.debug("Could not make a new URL from docBaseURL=" + docBaseURL); - } - if (docDirURL != null && !codeBaseURL.equals(docDirURL)) { - addURL(docDirURL); - } - } - - void addArchiveName( String jarname ) - { - if( !archives.contains( jarname ) ) - { - archives.add( jarname ); - } - } - - - public URL getDocBase() - { - return docBaseURL; - } - - public URL getCodeBase() - { - return codeBaseURL; - } - - Hashtable getJSReferencedObjects() { - return jsReferencedObjects; - } - /*************************************************************************** - **** Class Loading Methods - **************************************************************************/ - public synchronized Class findClass( String name ) throws ClassNotFoundException - { - Class rval = null; - //check the loaded classes - rval = findLoadedClass( name ); - if( rval == null ) { - try { - rval = super.findClass(name); - } catch (ClassFormatError cfe) { - Main.debug(name + ": Catched " + cfe + ". Trying to repair..."); - rval = loadFixedClass( name ); - } catch (Exception ex) { - Main.debug("findClass " + name + " " + ex.getMessage()); - } - } - if (rval == null) { - throw new ClassNotFoundException("Class: " + name); - } - return rval; - } - public Class loadClass(String name) throws ClassNotFoundException { - if (name.startsWith("org.kde.kjas.server")) { - SecurityManager sec = System.getSecurityManager(); - if (sec != null) - sec.checkPermission(kjas_access); - } - return super.loadClass(name); - } - private Hashtable loadedClasses = new Hashtable(); - - private synchronized final Class loadFixedClass(String name) throws ClassNotFoundException { - final String fileName = name.replace('.', '/') + ".class"; - try { - // try to get the class as resource - final URL u = getResource(fileName); - Main.debug(dbgID + name + ": got URL: " + u); - if (u == null) { - throw new ClassNotFoundException(fileName + ": invalid resource URL."); - } - java.security.cert.Certificate[] certs = {}; // FIXME - CodeSource cs = new CodeSource(u, certs); - InputStream instream = (InputStream)AccessController.doPrivileged( - new PrivilegedAction() { - public Object run() { - try { - return u.openStream(); - } catch (IOException ioe) { - ioe.printStackTrace(); - return null; - } - } - }, acc - ); - if (instream == null) { - throw new ClassNotFoundException(name + ": could not be loaded."); - } - ByteArrayOutputStream byteStream = new ByteArrayOutputStream(); - int cnt; - int total = 0; - int bufSize = 1024; - byte [] buffer = new byte[bufSize]; - while ((cnt = instream.read(buffer, 0, bufSize)) > 0) { - total += cnt; - byteStream.write(buffer, 0, cnt); - } - Main.debug(dbgID + name + ": " + total + " bytes"); - - Class cl = fixAndDefineClass(name, byteStream.toByteArray(), 0, total, cs); - if (cl != null) { - loadedClasses.put(name, cl); - } - return cl; - - } catch (Throwable e) { - e.printStackTrace(); - throw new ClassNotFoundException("triggered by " + e); - } - } - - public URL findResource( String name) - { - Main.debug( dbgID + "findResource, name = " + name ); - String displayName = name; - try { - URL u = new URL(name); - String filename = u.getFile(); - if (filename != null && filename.length() > 0) { - displayName = filename; - } - } catch (Throwable e) { - } - showStatus("Loading: " + displayName); - URL url = super.findResource( name ); - Main.debug("findResource for " + name + " returns " + url); - return url; - } - - protected PermissionCollection getPermissions(CodeSource cs) { - Main.debug(dbgID + " getPermissions(" + cs + ")"); - PermissionCollection permissions = super.getPermissions(cs); - Enumeration perms_enum = permissions.elements(); - while (perms_enum.hasMoreElements()) { - Main.debug(this + " Permission: " + perms_enum.nextElement()); - } - return permissions; - } - - - /** - * define the class <b>name</b>. If <b>name</b> is broken, try to fix it. - */ - private final Class fixAndDefineClass( - String name, - byte[] b, - int off, - int len, - CodeSource cs) throws ClassFormatError - { - KJASBrokenClassFixer fixer = new KJASBrokenClassFixer(); - if (fixer.process(b, off, len)) { - Main.debug(name + " fixed"); - } else { - Main.info(name + " could not be fixed"); - } - return defineClass(name, - fixer.getProcessedData(), - fixer.getProcessedDataOffset(), - fixer.getProcessedDataLength(), - cs); - } - - -} |