ServletOutputStream out = res.getOutputStream();
MainFrameModified frame = null;
Graphics g = null;
Applet applet = null;
try {
String appletParam = req.getParameter("applet");
String widthParam = req.getParameter("width");
String heightParam = req.getParameter("height");
// Load the given applet
// Must be in the standard CLASSPATH
try {
applet = (Applet) Class.forName(appletParam).newInstance();
}
catch (Exception e) {
throw new ServletException("Could not load applet:" + e);
}
// Convert width/height to integers
// Use default values if they weren't given or there's a problem
int width = WIDTH;
int height = HEIGHT;
try { width = Integer.parseInt(widthParam); }
catch (NumberFormatException e) { /* leave as default */ }
try { height = Integer.parseInt(heightParam); }
catch (NumberFormatException e) { /* leave as default */ }
// Get a list of the other parameters in a format MainFrame understands
// (Specifically, an array of "name=value" Strings)
Vector temp = new Vector();
Enumeration names = req.getParameterNames();
while (names.hasMoreElements()) {
String name = (String) names.nextElement();
if (name != "applet" && name != "width" && name != "height")
temp.addElement(name + "=" + req.getParameter(name));
}
temp.addElement("barebones=true"); // run without a menu bar
// Now from Vector to array
int size = temp.size();
String args[] = new String[size];
for (int i = 0; i < size; i++) {
args[i] = (String) temp.elementAt(i);
}
// Put the applet in its frame
// addNotify() is called by MainFrameModified
frame = new MainFrameModified(applet, args, width, height);
// Get a graphics region to match the applet size, using the Frame
Image image = frame.createImage(width, height);
g = image.getGraphics();
// Ask the applet to paint its children and itself
applet.validate();
paintContainerChildren(g, applet);
applet.paint(g);
// Encode and return what it painted
res.setContentType("image/gif");
GifEncoder encoder = new GifEncoder(image, out);
encoder.encode();
}
finally {
// Clean up resources
if (applet != null) {
applet.stop();
applet.destroy();
applet.removeAll();
}
if (g != null) {
g.dispose();
}
if (frame != null) {
frame.removeAll();
frame.removeNotify();
frame.dispose();
}
}
