public Reader openFile(String s) {
try {
// first try to read file from local file system
File file = new File(resourceFolder + "/" + s);
if (file.exists()) {
return new FileReader(file);
}
// next try for files included in jar
try {
Reader r = new InputStreamReader(this.getClass().getResourceAsStream("/" + s));
if (r != null) return r;
} catch (Exception e) {
e.printStackTrace();
}
ClassLoader loader = getClass().getClassLoader();
// Enumeration<java.net.URL> urls = loader.getResources(arg0);
java.net.URL url = getClass().getClassLoader().getResource(resourceFolder + "/" + s);
System.err.println("jar url " + url);
// or URL from web
if (url == null) url = new java.net.URL(s);
java.net.URLConnection site = url.openConnection();
InputStream is = site.getInputStream();
return new InputStreamReader(is);
} catch (IOException ioe) {
System.err.println("Could not open " + s);
return null;
}
}
/**
* get the context for the AppletClassLoader we are creating. the context is granted permission to
* create the class loader, connnect to the codebase, and whatever else the policy grants to all
* codebases.
*/
private AccessControlContext getAccessControlContext(final URL codebase) {
PermissionCollection perms =
AccessController.doPrivileged(
new PrivilegedAction<PermissionCollection>() {
@Override
public PermissionCollection run() {
Policy p = java.security.Policy.getPolicy();
if (p != null) {
return p.getPermissions(
new CodeSource(null, (java.security.cert.Certificate[]) null));
} else {
return null;
}
}
});
if (perms == null) perms = new Permissions();
// XXX: this is needed to be able to create the classloader itself!
perms.add(SecurityConstants.CREATE_CLASSLOADER_PERMISSION);
Permission p;
java.net.URLConnection urlConnection = null;
try {
urlConnection = codebase.openConnection();
p = urlConnection.getPermission();
} catch (java.io.IOException ioe) {
p = null;
}
if (p != null) perms.add(p);
if (p instanceof FilePermission) {
String path = p.getName();
int endIndex = path.lastIndexOf(File.separatorChar);
if (endIndex != -1) {
path = path.substring(0, endIndex + 1);
if (path.endsWith(File.separator)) {
path += "-";
}
perms.add(new FilePermission(path, SecurityConstants.FILE_READ_ACTION));
}
} else {
URL locUrl = codebase;
if (urlConnection instanceof JarURLConnection) {
locUrl = ((JarURLConnection) urlConnection).getJarFileURL();
}
String host = locUrl.getHost();
if (host != null && (host.length() > 0))
perms.add(new SocketPermission(host, SecurityConstants.SOCKET_CONNECT_ACCEPT_ACTION));
}
ProtectionDomain domain =
new ProtectionDomain(
new CodeSource(codebase, (java.security.cert.Certificate[]) null), perms);
AccessControlContext acc = new AccessControlContext(new ProtectionDomain[] {domain});
return acc;
}