Java Code Examples for org.apache.catalina.connector.Response#flushBuffer()

/**
 * Invoke the next Valve in the sequence. When the invoke returns, check
 * the response state. If the status code is greater than or equal to 400
 * or an uncaught exception was thrown then the error handling will be
 * triggered.
 *
 * @param request The servlet request to be processed
 * @param response The servlet response to be created
 *
 * @exception IOException if an input/output error occurs
 * @exception ServletException if a servlet error occurs
 */
@Override
public void invoke(Request request, Response response) throws IOException, ServletException {

    // Perform the request
    getNext().invoke(request, response);

    if (response.isCommitted()) {
        if (response.setErrorReported()) {
            // Error wasn't previously reported but we can't write an error
            // page because the response has already been committed. Attempt
            // to flush any data that is still to be written to the client.
            try {
                response.flushBuffer();
            } catch (Throwable t) {
                ExceptionUtils.handleThrowable(t);
            }
            // Close immediately to signal to the client that something went
            // wrong
            response.getCoyoteResponse().action(ActionCode.CLOSE_NOW,
                    request.getAttribute(RequestDispatcher.ERROR_EXCEPTION));
        }
        return;
    }

    Throwable throwable = (Throwable) request.getAttribute(RequestDispatcher.ERROR_EXCEPTION);

    // If an async request is in progress and is not going to end once this
    // container thread finishes, do not process any error page here.
    if (request.isAsync() && !request.isAsyncCompleting()) {
        return;
    }

    if (throwable != null && !response.isError()) {
        // Make sure that the necessary methods have been called on the
        // response. (It is possible a component may just have set the
        // Throwable. Tomcat won't do that but other components might.)
        // These are safe to call at this point as we know that the response
        // has not been committed.
        response.reset();
        response.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
    }

    // One way or another, response.sendError() will have been called before
    // execution reaches this point and suspended the response. Need to
    // reverse that so this valve can write to the response.
    response.setSuspended(false);

    try {
        report(request, response, throwable);
    } catch (Throwable tt) {
        ExceptionUtils.handleThrowable(tt);
    }
}
 

/**
 * Invoke the next Valve in the sequence. When the invoke returns, check
 * the response state. If the status code is greater than or equal to 400
 * or an uncaught exception was thrown then the error handling will be
 * triggered.
 *
 * @param request The servlet request to be processed
 * @param response The servlet response to be created
 *
 * @exception IOException if an input/output error occurs
 * @exception ServletException if a servlet error occurs
 */
@Override
public void invoke(Request request, Response response) throws IOException, ServletException {

    // Perform the request
    getNext().invoke(request, response);

    if (response.isCommitted()) {
        if (response.setErrorReported()) {
            // Error wasn't previously reported but we can't write an error
            // page because the response has already been committed. Attempt
            // to flush any data that is still to be written to the client.
            try {
                response.flushBuffer();
            } catch (Throwable t) {
                ExceptionUtils.handleThrowable(t);
            }
            // Close immediately to signal to the client that something went
            // wrong
            response.getCoyoteResponse().action(ActionCode.CLOSE_NOW, null);
        }
        return;
    }

    Throwable throwable = (Throwable) request.getAttribute(RequestDispatcher.ERROR_EXCEPTION);

    // If an async request is in progress and is not going to end once this
    // container thread finishes, do not trigger error page handling - it
    // will be triggered later if required.
    if (request.isAsync() && !request.isAsyncCompleting()) {
        return;
    }

    if (throwable != null && !response.isError()) {
        // Make sure that the necessary methods have been called on the
        // response. (It is possible a component may just have set the
        // Throwable. Tomcat won't do that but other components might.)
        // These are safe to call at this point as we know that the response
        // has not been committed.
        response.reset();
        response.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
    }

    // One way or another, response.sendError() will have been called before
    // execution reaches this point and suspended the response. Need to
    // reverse that so this valve can write to the response.
    response.setSuspended(false);

    try {
        report(request, response, throwable);
    } catch (Throwable tt) {
        ExceptionUtils.handleThrowable(tt);
    }
}
 

/**
 * Invoke the next Valve in the sequence. When the invoke returns, check
 * the response state. If the status code is greater than or equal to 400
 * or an uncaught exception was thrown then the error handling will be
 * triggered.
 *
 * @param request The servlet request to be processed
 * @param response The servlet response to be created
 *
 * @exception IOException if an input/output error occurs
 * @exception ServletException if a servlet error occurs
 */
@Override
public void invoke(Request request, Response response) throws IOException, ServletException {

    // Perform the request
    getNext().invoke(request, response);

    if (response.isCommitted()) {
        if (response.setErrorReported()) {
            // Error wasn't previously reported but we can't write an error
            // page because the response has already been committed. Attempt
            // to flush any data that is still to be written to the client.
            try {
                response.flushBuffer();
            } catch (Throwable t) {
                ExceptionUtils.handleThrowable(t);
            }
            // Close immediately to signal to the client that something went
            // wrong
            response.getCoyoteResponse().action(ActionCode.CLOSE_NOW, null);
        }
        return;
    }

    Throwable throwable = (Throwable) request.getAttribute(RequestDispatcher.ERROR_EXCEPTION);

    // If an async request is in progress and is not going to end once this
    // container thread finishes, do not process any error page here.
    if (request.isAsync() && !request.isAsyncCompleting()) {
        return;
    }

    if (throwable != null && !response.isError()) {
        // Make sure that the necessary methods have been called on the
        // response. (It is possible a component may just have set the
        // Throwable. Tomcat won't do that but other components might.)
        // These are safe to call at this point as we know that the response
        // has not been committed.
        response.reset();
        response.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
    }

    // One way or another, response.sendError() will have been called before
    // execution reaches this point and suspended the response. Need to
    // reverse that so this valve can write to the response.
    response.setSuspended(false);

    try {
        report(request, response, throwable);
    } catch (Throwable tt) {
        ExceptionUtils.handleThrowable(tt);
    }
}