public void destroy() {
for (Iterator it = _aues.values().iterator(); it.hasNext(); ) {
final AuExtension aue = (AuExtension) it.next();
try {
aue.destroy();
} catch (Throwable ex) {
log.warningBriefly("Unable to stop " + aue, ex);
}
}
}
// called by Provider
InputStream getResourceAsStream(HttpServletRequest request, String path, boolean locate)
throws IOException, ServletException {
if (locate)
path = Servlets.locate(_webctx.getServletContext(), request, path, _webctx.getLocator());
if (_cache.getCheckPeriod() >= 0) {
// Due to Web server might cache the result, we use URL if possible
try {
URL url = _webctx.getResource(path);
if (url != null) return url.openStream();
} catch (Throwable ex) {
log.warningBriefly("Unable to read from URL: " + path, ex);
}
}
// Note: _webctx will handle the renaming for debugJS (.src.js)
return _webctx.getResourceAsStream(path);
}
/**
* Adds an AU extension and associates it with the specified prefix.
*
* <p>If there was an AU extension associated with the same name, the the old AU extension will be
* replaced.
*
* <p>If you want to add an Au extension, even before DHtmlUpdateServlet is started, use {@link
* #addAuExtension(WebApp, String, AuExtension)} instead.
*
* @param prefix the prefix. It must start with "/", but it cannot be "/" nor "/web" (which are
* reserved).
* @param extension the AU extension (never null).
* @return the previous AU extension associated with the specified prefix, or null if the prefix
* was not associated before.
* @see #addAuExtension(WebApp,String,AuExtension)
* @since 5.0.0
*/
public AuExtension addAuExtension(String prefix, AuExtension extension) throws ServletException {
checkAuExtension(prefix, extension);
if (_aues.get(prefix) == extension) // speed up to avoid sync
return extension; // nothing changed
extension.init(this);
// To avoid using sync in doGet(), we make a copy here
final AuExtension old;
synchronized (this) {
final Map ps = new HashMap(_aues);
old = (AuExtension) ps.put(prefix, extension);
_aues = ps;
}
if (old != null)
try {
old.destroy();
} catch (Throwable ex) {
log.warningBriefly("Unable to stop " + old, ex);
}
return old;
}
/**
* Process asynchronous update requests from the client.
*
* @since 3.0.0
*/
protected void process(Session sess, HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
final String errClient = request.getHeader("ZK-Error-Report");
if (errClient != null)
if (log.debugable())
log.debug("Error found at client: " + errClient + "\n" + Servlets.getDetail(request));
// parse desktop ID
final WebApp wapp = sess.getWebApp();
final WebAppCtrl wappc = (WebAppCtrl) wapp;
final AuDecoder audec = getAuDecoder(wapp);
final String dtid = audec.getDesktopId(request);
if (dtid == null) {
// Bug 1929139: incomplete request (IE only)
if (log.debugable()) {
final String msg = "Incomplete request\n" + Servlets.getDetail(request);
log.debug(msg);
}
response.sendError(467, "Incomplete request");
return;
}
Desktop desktop = getDesktop(sess, dtid);
if (desktop == null) {
final String cmdId = audec.getFirstCommand(request);
if (!"rmDesktop".equals(cmdId))
desktop = recoverDesktop(sess, request, response, wappc, dtid);
if (desktop == null) {
response.setIntHeader("ZK-Error", response.SC_GONE); // denote timeout
sessionTimeout(request, response, wapp, dtid);
return;
}
}
WebManager.setDesktop(request, desktop);
// reason: a new page might be created (such as include)
final String sid = request.getHeader("ZK-SID");
if (sid != null) // Some client might not have ZK-SID
response.setHeader("ZK-SID", sid);
// parse commands
final Configuration config = wapp.getConfiguration();
final List aureqs;
boolean keepAlive = false;
try {
final boolean timerKeepAlive = config.isTimerKeepAlive();
aureqs = audec.decode(request, desktop);
for (Iterator it = aureqs.iterator(); it.hasNext(); ) {
final String cmdId = ((AuRequest) it.next()).getCommand();
keepAlive = !(!timerKeepAlive && Events.ON_TIMER.equals(cmdId)) && !"dummy".equals(cmdId);
// dummy is used for PollingServerPush for piggyback
if (keepAlive) break; // done
}
} catch (Throwable ex) {
log.warningBriefly(ex);
responseError(request, response, Exceptions.getMessage(ex));
return;
}
if (aureqs.isEmpty()) {
final String errmsg = "Illegal request: cmd required";
log.debug(errmsg);
responseError(request, response, errmsg);
return;
}
((SessionCtrl) sess).notifyClientRequest(keepAlive);
// if (log.debugable()) log.debug("AU request: "+aureqs);
final DesktopCtrl desktopCtrl = (DesktopCtrl) desktop;
final Execution exec = new ExecutionImpl(getServletContext(), request, response, desktop, null);
if (sid != null) ((ExecutionCtrl) exec).setRequestId(sid);
final AuWriter out = AuWriters.newInstance();
out.setCompress(_compress);
out.open(
request,
response,
desktop.getDevice().isSupported(Device.RESEND)
? getProcessTimeout(config.getResendDelay())
: 0);
// Note: getResendDelay() might return nonpositive
try {
wappc.getUiEngine().execUpdate(exec, aureqs, out);
} catch (RequestOutOfSequenceException ex) {
log.warning(ex.getMessage());
response.setHeader("ZK-SID", sid);
response.setIntHeader("ZK-Error", AuResponse.SC_OUT_OF_SEQUENCE);
}
out.close(request, response);
}
// Servlet//
public void init() throws ServletException {
final ServletConfig config = getServletConfig();
final ServletContext ctx = getServletContext();
ctx.setAttribute(ATTR_UPDATE_SERVLET, this);
final WebManager webman = WebManager.getWebManager(ctx);
String param = config.getInitParameter("compress");
_compress = param == null || param.length() == 0 || "true".equals(param);
if (!_compress) webman.getClassWebResource().setCompress(null); // disable all
// Copies au extensions defined before DHtmlUpdateServlet is started
final WebApp wapp = webman.getWebApp();
final Map aues = (Map) wapp.getAttribute(ATTR_AU_PROCESSORS);
if (aues != null) {
for (Iterator it = aues.entrySet().iterator(); it.hasNext(); ) {
final Map.Entry me = (Map.Entry) it.next();
addAuExtension((String) me.getKey(), (AuExtension) me.getValue());
}
wapp.removeAttribute(ATTR_AU_PROCESSORS);
}
// ZK 5: extension defined in init-param has the higher priority
for (int j = 0; ; ++j) {
param = config.getInitParameter("extension" + j);
if (param == null) {
param = config.getInitParameter("processor" + j); // backward compatible
if (param == null) break;
}
final int k = param.indexOf('=');
if (k < 0) {
log.warning("Ignore init-param: illegal format, " + param);
continue;
}
final String prefix = param.substring(0, k).trim();
final String clsnm = param.substring(k + 1).trim();
try {
addAuExtension(prefix, (AuExtension) Classes.newInstanceByThread(clsnm));
} catch (ClassNotFoundException ex) {
log.warning("Ignore init-param: class not found, " + clsnm);
} catch (ClassCastException ex) {
log.warning("Ignore: " + clsnm + " not implement " + AuExtension.class);
} catch (Throwable ex) {
log.warning("Ignore init-param: failed to add an AU extension, " + param, ex);
}
}
if (getAuExtension("/upload") == null) {
try {
addAuExtension("/upload", new AuUploader());
} catch (Throwable ex) {
final String msg = "Make sure commons-fileupload.jar is installed.";
log.warningBriefly("Failed to configure fileupload. " + msg, ex);
// still add /upload to generate exception when fileupload is used
addAuExtension(
"/upload",
new AuExtension() {
public void init(DHtmlUpdateServlet servlet) {}
public void destroy() {}
public void service(
HttpServletRequest request, HttpServletResponse response, String pi)
throws ServletException, IOException {
if (Sessions.getCurrent(false) != null)
throw new ServletException("Failed to upload. " + msg);
}
});
}
}
if (getAuExtension("/view") == null) addAuExtension("/view", new AuDynaMediar());
}
/**
* Loads, parses and returns the resource of the specified URI, or null if not found. The parser
* is defined by the loader defined in {@link ResourceCache}.
*
* @param cache the resource cache. Note: its loader must extend from {@link ResourceLoader}.
* @param path the URI path
* @param extra the extra parameter that will be passed to {@link
* ResourceLoader#parse(String,File,Object)} and {@link
* ResourceLoader#parse(String,URL,Object)}
*/
public static final <V> V get(
ResourceCache<V> cache, ServletContext ctx, String path, Object extra) {
// 20050905: Tom Yeh
// We don't need to handle the default name if user specifies only a dir
// because it is handled by the container directly
// And, web developer has to specify <welcome-file> in web.xml
URL url = null;
if (path == null || path.length() == 0) path = "/";
else if (path.charAt(0) != '/') {
if (path.indexOf("://") > 0) {
try {
url = new URL(path);
} catch (java.net.MalformedURLException ex) {
throw new SystemException(ex);
}
} else path = '/' + path;
}
if (url == null) {
if (path.startsWith("/~")) {
final ServletContext ctx0 = ctx;
final String path0 = path;
final int j = path.indexOf('/', 2);
final String ctxpath;
if (j >= 0) {
ctxpath = "/" + path.substring(2, j);
path = path.substring(j);
} else {
ctxpath = "/" + path.substring(2);
path = "/";
}
final ExtendletContext extctx = Servlets.getExtendletContext(ctx, ctxpath.substring(1));
if (extctx != null) {
url = extctx.getResource(path);
// if (log.debugable()) log.debug("Resolving "+path0+" to "+url);
if (url == null) return null;
try {
return cache.get(new ResourceInfo(path, url, extra));
} catch (Throwable ex) {
final IOException ioex = getIOException(ex);
if (ioex == null) throw SystemException.Aide.wrap(ex);
log.warningBriefly("Unable to load " + url, ioex);
}
return null;
}
ctx = ctx.getContext(ctxpath);
if (ctx == null) { // failed
// if (log.debugable()) log.debug("Context not found: "+ctxpath);
ctx = ctx0;
path = path0; // restore
}
}
final String flnm = ctx.getRealPath(path);
if (flnm != null) {
try {
return cache.get(new ResourceInfo(path, new File(flnm), extra));
// it is loader's job to check the existence
} catch (Throwable ex) {
final IOException ioex = getIOException(ex);
if (ioex == null) throw SystemException.Aide.wrap(ex);
log.warningBriefly("Unable to load " + flnm, ioex);
}
return null;
}
}
// try url because some server uses JAR format
try {
if (url == null) url = ctx.getResource(path);
if (url != null) return cache.get(new ResourceInfo(path, url, extra));
} catch (Throwable ex) {
final IOException ioex = getIOException(ex);
if (ioex == null) throw SystemException.Aide.wrap(ex);
log.warningBriefly("Unable to load " + path, ioex);
}
return null;
}
