Examples with ServerException org.directwebremoting.extend.ServerException used on opensource projects

Example 1 with ServerException

use of org.directwebremoting.extend.ServerException in project ma-core-public by infiniteautomation.

the class Batch method parseParameters.

/**
 * Fish out the important parameters
 * @throws ServerException If the parsing of input parameter fails
 */
protected void parseParameters() throws ServerException {
    Map paramMap = getAllParameters();
    calls = new Calls();
    // Work out how many calls are in this packet
    String callStr = (String) paramMap.remove(ProtocolConstants.INBOUND_CALL_COUNT);
    int callCount;
    try {
        callCount = Integer.parseInt(callStr);
    } catch (NumberFormatException ex) {
        throw new ServerException(Messages.getString("BaseCallMarshaller.BadCallCount"));
    }
    // Extract the ids, scriptnames and methodnames
    for (int callNum = 0; callNum < callCount; callNum++) {
        Call call = new Call();
        calls.addCall(call);
        InboundContext inctx = new InboundContext();
        inboundContexts.add(inctx);
        String prefix = ProtocolConstants.INBOUND_CALLNUM_PREFIX + callNum + ProtocolConstants.INBOUND_CALLNUM_SUFFIX;
        // The special values
        String callId = (String) paramMap.remove(prefix + ProtocolConstants.INBOUND_KEY_ID);
        call.setCallId(callId);
        if (!LocalUtil.isLetterOrDigitOrUnderline(callId)) {
            throw new SecurityException("Call IDs may only contain Java Identifiers");
        }
        String scriptName = (String) paramMap.remove(prefix + ProtocolConstants.INBOUND_KEY_SCRIPTNAME);
        call.setScriptName(scriptName);
        if (!LocalUtil.isLetterOrDigitOrUnderline(scriptName)) {
            throw new SecurityException("Script names may only contain Java Identifiers");
        }
        String methodName = (String) paramMap.remove(prefix + ProtocolConstants.INBOUND_KEY_METHODNAME);
        call.setMethodName(methodName);
        if (!LocalUtil.isLetterOrDigitOrUnderline(methodName)) {
            throw new SecurityException("Method names may only contain Java Identifiers");
        }
        // Look for parameters to this method
        for (Iterator it = paramMap.entrySet().iterator(); it.hasNext(); ) {
            Map.Entry entry = (Map.Entry) it.next();
            String key = (String) entry.getKey();
            if (key.startsWith(prefix)) {
                String data = (String) entry.getValue();
                String[] split = ParseUtil.splitInbound(data);
                String value = split[LocalUtil.INBOUND_INDEX_VALUE];
                String type = split[LocalUtil.INBOUND_INDEX_TYPE];
                inctx.createInboundVariable(callNum, key, type, value);
                it.remove();
            }
        }
    }
    String batchId = (String) paramMap.remove(ProtocolConstants.INBOUND_KEY_BATCHID);
    calls.setBatchId(batchId);
    if (!LocalUtil.isLetterOrDigitOrUnderline(batchId)) {
        throw new SecurityException("Batch IDs may only contain Java Identifiers");
    }
    httpSessionId = (String) paramMap.remove(ProtocolConstants.INBOUND_KEY_HTTP_SESSIONID);
    scriptSessionId = (String) paramMap.remove(ProtocolConstants.INBOUND_KEY_SCRIPT_SESSIONID);
    page = (String) paramMap.remove(ProtocolConstants.INBOUND_KEY_PAGE);
    for (Iterator it = paramMap.entrySet().iterator(); it.hasNext(); ) {
        Map.Entry entry = (Map.Entry) it.next();
        String key = (String) entry.getKey();
        String value = (String) entry.getValue();
        if (key.startsWith(ProtocolConstants.INBOUND_KEY_METADATA)) {
            spareParameters.put(key.substring(ProtocolConstants.INBOUND_KEY_METADATA.length()), value);
        }
    }
}

Example 2 with ServerException

use of org.directwebremoting.extend.ServerException in project ma-core-public by infiniteautomation.

the class ParseUtil method parsePost.

/**
 * Parse an HTTP POST request to fill out the scriptName, methodName and
 * paramList properties. This method should not fail unless it will not
 * be possible to return any sort of error to the user. Failure cases should
 * be handled by the <code>checkParams()</code> method.
 * @param req The original browser's request
 * @return The equivalent of HttpServletRequest.getParameterMap() for now
 * @throws ServerException If reading from the request body stream fails
 */
public static Map parsePost(HttpServletRequest req) throws ServerException {
    Map paramMap = new HashMap();
    BufferedReader in = null;
    try {
        // I've had reports of data loss in Tomcat 5.0 that relate to this bug
        // http://issues.apache.org/bugzilla/show_bug.cgi?id=27447
        // See mails to users@dwr.dev.java.net:
        // Subject: "Tomcat 5.x read-ahead problem"
        // From: CAKALIC, JAMES P [AG-Contractor/1000]
        // It would be more normal to do the following:
        // BufferedReader in = req.getReader();
        in = new BufferedReader(new InputStreamReader(req.getInputStream()));
        while (true) {
            String line = in.readLine();
            if (line == null) {
                if (paramMap.isEmpty()) {
                    // Normally speaking we should just bail out, but if
                    // we are using DWR with Acegi without ActiveX on IE,
                    // then Acegi 'fixes' the parameters for us.
                    Enumeration en = req.getParameterNames();
                    while (en.hasMoreElements()) {
                        String name = (String) en.nextElement();
                        paramMap.put(name, req.getParameter(name));
                    }
                }
                break;
            }
            if (line.indexOf('&') != -1) {
                // If there are any &s then this must be iframe post and all the
                // parameters have got dumped on one line, split with &
                log.debug("Using iframe POST mode");
                StringTokenizer st = new StringTokenizer(line, "&");
                while (st.hasMoreTokens()) {
                    String part = st.nextToken();
                    part = LocalUtil.decode(part);
                    parsePostLine(part, paramMap);
                }
            } else {
                // Horay, this is a normal one!
                parsePostLine(line, paramMap);
            }
        }
    } catch (Exception ex) {
        throw new ServerException(Messages.getString("ParseUtil.InputReadFailed"), ex);
    } finally {
        if (in != null) {
            try {
                in.close();
            } catch (IOException ex) {
            // Ignore
            }
        }
    }
    // http://developer.apple.com/internet/safari/uamatrix.html
    if (paramMap.size() == 1) {
        // This looks like a broken Mac where the line endings are confused
        log.debug("Using Broken Safari POST mode");
        // Iterators insist that we call hasNext() before we start
        Iterator it = paramMap.keySet().iterator();
        if (!it.hasNext()) {
            throw new IllegalStateException("No entries in non empty map!");
        }
        // So get the first
        String key = (String) it.next();
        String value = (String) paramMap.get(key);
        String line = key + ProtocolConstants.INBOUND_DECL_SEPARATOR + value;
        StringTokenizer st = new StringTokenizer(line, "\n");
        while (st.hasMoreTokens()) {
            String part = st.nextToken();
            part = LocalUtil.decode(part);
            parsePostLine(part, paramMap);
        }
    }
    return paramMap;
}

Example 3 with ServerException

use of org.directwebremoting.extend.ServerException in project ma-core-public by infiniteautomation.

the class ParseUtil method parseGet.

/**
 * Parse an HTTP GET request to fill out the scriptName, methodName and
 * paramList properties. This method should not fail unless it will not
 * be possible to return any sort of error to the user. Failure cases should
 * be handled by the <code>checkParams()</code> method.
 * @param req The original browser's request
 * @return Simply HttpRequest.getParameterMap() for now
 * @throws ServerException If the parsing fails
 */
public static Map parseGet(HttpServletRequest req) throws ServerException {
    Map convertedMap = new HashMap();
    Map paramMap = req.getParameterMap();
    for (Iterator it = paramMap.entrySet().iterator(); it.hasNext(); ) {
        Map.Entry entry = (Map.Entry) it.next();
        String key = (String) entry.getKey();
        String[] array = (String[]) entry.getValue();
        if (array.length == 1) {
            convertedMap.put(key, array[0]);
        } else {
            throw new ServerException(Messages.getString("ParseUtil.MultiValues", key));
        }
    }
    return convertedMap;
}

Example 4 with ServerException

use of org.directwebremoting.extend.ServerException in project ma-core-public by infiniteautomation.

the class PollHandler method handle.

/* (non-Javadoc)
     * @see org.directwebremoting.Handler#handle(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
     */
public void handle(HttpServletRequest request, HttpServletResponse response) throws IOException {
    // all Jetty continuation restarts.
    if (JettyContinuationSleeper.isRestart(request)) {
        JettyContinuationSleeper.restart(request);
        return;
    }
    // A PollBatch is the information that we expect from the request.
    // if the parse fails we can do little more than tell the browser that
    // something went wrong.
    final PollBatch batch;
    try {
        batch = new PollBatch(request, pageNormalizer);
    } catch (ServerException ex) {
        // Send a batch exception to the server because the parse failed
        String script = EnginePrivate.getRemoteHandleBatchExceptionScript(null, ex);
        sendErrorScript(response, script);
        return;
    }
    String bodySessionId = batch.getHttpSessionId();
    if (crossDomainSessionSecurity) {
        checkNotCsrfAttack(request, bodySessionId);
    }
    // We might need to complain that reverse ajax is not enabled.
    if (!activeReverseAjaxEnabled) {
        log.error("Polling and Comet are disabled. To enable them set the init-param activeReverseAjaxEnabled to true. See http://getahead.org/dwr/server/servlet for more.");
        String script = EnginePrivate.getRemotePollCometDisabledScript(batch.getBatchId());
        sendErrorScript(response, script);
        return;
    }
    // Complain if GET is disallowed
    if (batch.isGet() && !allowGetForSafariButMakeForgeryEasier) {
        // Send a batch exception to the server because the parse failed
        String script = EnginePrivate.getRemoteHandleBatchExceptionScript(batch.getBatchId(), new SecurityException("GET Disallowed"));
        sendErrorScript(response, script);
        return;
    }
    // A script conduit is some route from a ScriptSession back to the page
    // that belongs to the session. There may be zero or many of these
    // conduits (although if there are more than 2, something is strange)
    // All scripts destined for a page go to a ScriptSession and then out
    // via a ScriptConduit.
    final RealScriptSession scriptSession = batch.getScriptSession();
    // Create a conduit depending on the type of request (from the URL)
    final BaseScriptConduit conduit = createScriptConduit(batch, response);
    // So we're going to go to sleep. How do we wake up?
    final Sleeper sleeper;
    // If this is Jetty then we can use Continuations
    if (Continuation.isJetty()) {
        sleeper = new JettyContinuationSleeper(request);
    } else {
        sleeper = new ThreadWaitSleeper();
    }
    // There are various reasons why we want to wake up and carry on ...
    final List alarms = new ArrayList();
    // If the conduit has an error flushing data, it needs to give up
    alarms.add(conduit.getErrorAlarm());
    // Set the system up to resume on output (perhaps with delay)
    if (batch.getPartialResponse() == PartialResponse.NO || maxWaitAfterWrite != -1) {
        // add an output listener to the script session that calls the
        // "wake me" method on whatever is putting us to sleep
        alarms.add(new OutputAlarm(scriptSession, maxWaitAfterWrite));
    }
    // Set the system up to resume anyway after maxConnectedTime
    long connectedTime = serverLoadMonitor.getConnectedTime();
    alarms.add(new TimedAlarm(connectedTime));
    // We also need to wake-up if the server is being shut down
    // WARNING: This code has a non-obvious side effect - The server load
    // monitor (which hands out shutdown messages) also monitors usage by
    // looking at the number of connected alarms.
    alarms.add(new ShutdownAlarm(serverLoadMonitor));
    // Make sure that all the alarms know what to wake
    for (Iterator it = alarms.iterator(); it.hasNext(); ) {
        Alarm alarm = (Alarm) it.next();
        alarm.setAlarmAction(sleeper);
    }
    // Register the conduit with a script session so messages can get out.
    // This must happen late on in this method because this will cause any
    // scripts cached in the script session (because there was no conduit
    // available when they were written) to be sent to the conduit.
    // We need any AlarmScriptConduits to be notified so they can make
    // maxWaitWfterWrite work for all cases
    scriptSession.addScriptConduit(conduit);
    // We need to do something sensible when we wake up ...
    Runnable onAwakening = new Runnable() {

        public void run() {
            // Cancel all the alarms
            for (Iterator it = alarms.iterator(); it.hasNext(); ) {
                Alarm alarm = (Alarm) it.next();
                alarm.cancel();
            }
            // We can't be used as a conduit to the browser any more
            scriptSession.removeScriptConduit(conduit);
            // Tell the browser to come back at the right time
            try {
                int timeToNextPoll = serverLoadMonitor.getDisconnectedTime();
                conduit.close(timeToNextPoll);
            } catch (IOException ex) {
                log.warn("Failed to write reconnect info to browser");
            }
        }
    };
    // Actually go to sleep. This *must* be the last thing in this method to
    // cope with all the methods of affecting Threads. Jetty throws,
    // Weblogic continues, others wait().
    sleeper.goToSleep(onAwakening);
}