Example usage for javax.servlet.http HttpServletResponse resetBuffer

List of usage examples for javax.servlet.http HttpServletResponse resetBuffer

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Introduction

In this page you can find the example usage for javax.servlet.http HttpServletResponse resetBuffer.

Prototype


public void resetBuffer();

Source Link

Document

Clears the content of the underlying buffer in the response without clearing headers or status code.

Usage

From source file:io.druid.server.AsyncQueryForwardingServlet.java

private static void handleException(HttpServletResponse response, ObjectMapper objectMapper,
        Exception exception) throws IOException {
    if (!response.isCommitted()) {
        final String errorMessage = exception.getMessage() == null ? "null exception" : exception.getMessage();

        response.resetBuffer();
        response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
        objectMapper.writeValue(response.getOutputStream(), ImmutableMap.of("error", errorMessage));
    }/*from w  w  w.  j  av  a 2 s. c o m*/
    response.flushBuffer();
}

From source file:com.intel.rsa.podm.rest.filters.UrlValidationFilter.java

private void setErrorResponse(HttpServletResponse httpServletResponse, ErrorResponse error) {
    httpServletResponse.reset();/*from w ww . j a  va  2 s.co m*/
    httpServletResponse.resetBuffer();

    //we have to add since this request is outside our app
    httpServletResponse.addHeader("OData-Version", "4.0");
    httpServletResponse.addHeader("Cache-Control", "max-age=0");
    httpServletResponse.addHeader("Access-Control-Allow-Origin", "*");

    httpServletResponse.setCharacterEncoding(DEFAULT_ENCODING_HTTP);
    httpServletResponse.setContentType(MediaType.APPLICATION_JSON);
    httpServletResponse.setStatus(error.getErrorCode());

    try (PrintWriter responseWriter = httpServletResponse.getWriter()) {
        responseWriter.print(getJsonResponse(error));
        responseWriter.flush();
    } catch (IOException e) {
        logger.e("Unable to write response. Sending empty body response.", e);
    }
}

From source file:io.druid.server.AsyncManagementForwardingServlet.java

private void handleBadRequest(HttpServletResponse response, String errorMessage) throws IOException {
    if (!response.isCommitted()) {
        response.resetBuffer();
        response.setStatus(HttpServletResponse.SC_BAD_REQUEST);
        jsonMapper.writeValue(response.getOutputStream(), ImmutableMap.of("error", errorMessage));
    }//w ww .  j a  v a  2  s .c  o  m
    response.flushBuffer();
}

From source file:de.betterform.agent.web.servlet.XFormsErrorServlet.java

@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {
    response.reset();//w w w . j a va  2s . co  m
    response.resetBuffer();

    response.setContentType("text/html");
    PrintWriter writer = response.getWriter();
    writer.println(getHtmlhead(request.getContextPath()));
    writer.println(getHTML(request));
    writer.println(HTMLFOOT);
    writer.flush();
    response.getOutputStream().close();

}

From source file:com.zlfun.framework.excel.ExcelUtils.java

public static <T> void httpOutput(String name, Class<T> clazz, List<T> list, HttpServletRequest request,
        HttpServletResponse response) {
    try {/*from w w w  .  j av a2 s.c  om*/
        request.setCharacterEncoding("UTF-8");//request???
        String fileName = name;//??
        String contentType = "application/vnd.ms-excel";//?
        String recommendedName = new String(fileName.getBytes(), "iso_8859_1");//????
        response.setContentType(contentType);//?
        response.setHeader("Content-Disposition", "attachment; filename=" + recommendedName + "\"");//
        response.resetBuffer();
        //?
        ServletOutputStream sos = response.getOutputStream();
        write(name, clazz, list, sos);
        sos.flush();
        sos.close();
    } catch (UnsupportedEncodingException ex) {
        Logger.getLogger(ExcelUtils.class.getName()).log(Level.SEVERE, null, ex);
    } catch (IOException ex) {
        Logger.getLogger(ExcelUtils.class.getName()).log(Level.SEVERE, null, ex);
    }
}

From source file:ie.wombat.rt.fireeagle.CookieConsumer.java

/**
 * Handle an exception that occurred while processing an HTTP request.
 * Depending on the exception, either send a response, redirect the client
 * or propagate an exception./*w w  w.j a  va  2 s .  c om*/
 */
public static void handleException(Exception e, HttpServletRequest request, HttpServletResponse response,
        OAuthConsumer consumer) throws IOException, ServletException {
    if (e instanceof RedirectException) {
        RedirectException redirect = (RedirectException) e;
        String targetURL = redirect.getTargetURL();
        if (targetURL != null) {
            response.setStatus(HttpServletResponse.SC_MOVED_TEMPORARILY);
            response.setHeader("Location", targetURL);
        }
    } else if (e instanceof OAuthProblemException) {
        OAuthProblemException p = (OAuthProblemException) e;
        String problem = p.getProblem();
        if (consumer != null && RECOVERABLE_PROBLEMS.contains(problem)) {
            try {
                CookieMap cookies = new CookieMap(request, response);
                OAuthAccessor accessor = newAccessor(consumer, cookies);
                getAccessToken(request, cookies, accessor);
                // getAccessToken(request, consumer,
                // new CookieMap(request, response));
            } catch (Exception e2) {
                handleException(e2, request, response, null);
            }
        } else {
            try {
                StringWriter s = new StringWriter();
                PrintWriter pw = new PrintWriter(s);
                e.printStackTrace(pw);
                pw.flush();
                p.setParameter("stack trace", s.toString());
            } catch (Exception rats) {
            }
            response.setStatus(p.getHttpStatusCode());
            response.resetBuffer();
            request.setAttribute("OAuthProblemException", p);
            request.getRequestDispatcher //
            ("/OAuthProblemException.jsp").forward(request, response);
        }
    } else if (e instanceof IOException) {
        throw (IOException) e;
    } else if (e instanceof ServletException) {
        throw (ServletException) e;
    } else if (e instanceof RuntimeException) {
        throw (RuntimeException) e;
    } else {
        throw new ServletException(e);
    }
}

From source file:fr.univlille2.ecm.platform.ui.web.auth.cas2.SecurityExceptionHandler.java

@Override
public void handleException(HttpServletRequest request, HttpServletResponse response, Throwable t)
        throws IOException, ServletException {

    @SuppressWarnings("deprecation")
    Throwable unwrappedException = unwrapException(t);
    log.debug("handleException#in");
    if (!ExceptionHelper.isSecurityError(unwrappedException)
            && !response.containsHeader(SSO_INITIAL_URL_REQUEST_KEY)) {
        super.handleException(request, response, t);
        return;/*w  w w.  j a  v a2s .c  om*/
    }

    Principal principal = request.getUserPrincipal();
    NuxeoPrincipal nuxeoPrincipal = null;
    if (principal instanceof NuxeoPrincipal) {
        nuxeoPrincipal = (NuxeoPrincipal) principal;
        // redirect to login than to requested page
        if (nuxeoPrincipal.isAnonymous()) {
            response.resetBuffer();

            String urlToReach = getURLToReach(request);
            log.debug(String.format("handleException#urlToReach#%s", urlToReach));
            Cookie cookieUrlToReach = new Cookie(NXAuthConstants.SSO_INITIAL_URL_REQUEST_KEY, urlToReach);
            cookieUrlToReach.setPath("/");
            cookieUrlToReach.setMaxAge(60);
            response.addCookie(cookieUrlToReach);
            log.debug(String.format("handleException#cookieUrlToReach#%s", cookieUrlToReach.getName()));
            if (!response.isCommitted()) {
                request.getRequestDispatcher(CAS_REDIRECTION_URL).forward(request, response);
            }
            FacesContext.getCurrentInstance().responseComplete();
        }
    }
    // go back to default handler
    super.handleException(request, response, t);
}

From source file:net.gplatform.sudoor.server.cors.CorsFilter.java

/**
 * Handles a CORS request that violates specification.
 * /*w  w  w  . j  a v a2 s .c o  m*/
 * @param request
 *            The {@link HttpServletRequest} object.
 * @param response
 *            The {@link HttpServletResponse} object.
 * @param filterChain
 *            The {@link FilterChain} object.
 */
private void handleInvalidCORS(final HttpServletRequest request, final HttpServletResponse response,
        final FilterChain filterChain) {
    String origin = request.getHeader(CorsFilter.REQUEST_HEADER_ORIGIN);
    String method = request.getMethod();
    String accessControlRequestHeaders = request.getHeader(REQUEST_HEADER_ACCESS_CONTROL_REQUEST_HEADERS);

    response.setContentType("text/plain");
    response.setStatus(HttpServletResponse.SC_FORBIDDEN);
    response.resetBuffer();

    if (log.isDebugEnabled()) {
        // Debug so no need for i18n
        StringBuilder message = new StringBuilder("Invalid CORS request; Origin=");
        message.append(origin);
        message.append(";Method=");
        message.append(method);
        if (accessControlRequestHeaders != null) {
            message.append(";Access-Control-Request-Headers=");
            message.append(accessControlRequestHeaders);
        }
        log.debug(message.toString());
    }
}

From source file:com.ucap.uccc.cmis.impl.atompub.CmisAtomPubServlet.java

/**
 * Prints the error HTML page.//from w ww  .  j a v a2 s.co m
 */
protected void printError(Exception ex, HttpServletResponse response) {
    int statusCode = HttpServletResponse.SC_INTERNAL_SERVER_ERROR;
    String exceptionName = "runtime";

    if (ex instanceof CmisRuntimeException) {
        LOG.error(ex.getMessage(), ex);
    } else if (ex instanceof CmisStorageException) {
        LOG.error(ex.getMessage(), ex);
        statusCode = getErrorCode((CmisStorageException) ex);
        exceptionName = ((CmisStorageException) ex).getExceptionName();
    } else if (ex instanceof CmisBaseException) {
        statusCode = getErrorCode((CmisBaseException) ex);
        exceptionName = ((CmisBaseException) ex).getExceptionName();
    } else if (ex instanceof IOException) {
        LOG.warn(ex.getMessage(), ex);
    } else {
        LOG.error(ex.getMessage(), ex);
    }

    if (response.isCommitted()) {
        LOG.warn("Failed to send error message to client. Response is already committed.", ex);
        return;
    }

    String message = ex.getMessage();
    if (!(ex instanceof CmisBaseException)) {
        message = "An error occurred!";
    }

    try {
        response.resetBuffer();
        response.setStatus(statusCode);
        response.setContentType("text/html");
        response.setCharacterEncoding(IOUtils.UTF8);

        PrintWriter pw = response.getWriter();

        pw.print("<html><head><title>Apache Chemistry OpenCMIS - " + exceptionName + " error</title>"
                + "<style><!--H1 {font-size:24px;line-height:normal;font-weight:bold;background-color:#f0f0f0;color:#003366;border-bottom:1px solid #3c78b5;padding:2px;} "
                + "BODY {font-family:Verdana,arial,sans-serif;color:black;font-size:14px;} "
                + "HR {color:#3c78b5;height:1px;}--></style></head><body>");
        pw.print("<h1>HTTP Status " + statusCode + " - <!--exception-->" + exceptionName
                + "<!--/exception--></h1>");
        pw.print("<p><!--message-->" + StringEscapeUtils.escapeHtml(message) + "<!--/message--></p>");

        String st = ExceptionHelper.getStacktraceAsString(ex);
        if (st != null) {
            pw.print("<hr noshade='noshade'/><!--stacktrace--><pre>\n" + st
                    + "\n</pre><!--/stacktrace--><hr noshade='noshade'/>");
        }

        pw.print("</body></html>");
    } catch (Exception e) {
        LOG.error(e.getMessage(), e);
        try {
            response.sendError(statusCode, message);
        } catch (Exception en) {
            // there is nothing else we can do
        }
    }
}

From source file:com.ark.website.filter.CORSFilter.java

/**
 * Handles a CORS request that violates specification.
 * //  ww  w.j  a  v  a  2  s .  c  o m
 * @param request
 *            The {@link HttpServletRequest} object.
 * @param response
 *            The {@link HttpServletResponse} object.
 * @param filterChain
 *            The {@link FilterChain} object.
 * @throws IOException
 * @throws ServletException
 */
public void handleInvalidCORS(final HttpServletRequest request, final HttpServletResponse response,
        final FilterChain filterChain) {
    String origin = request.getHeader(CORSFilter.REQUEST_HEADER_ORIGIN);
    String method = request.getMethod();
    String accessControlRequestHeaders = request.getHeader(REQUEST_HEADER_ACCESS_CONTROL_REQUEST_HEADERS);

    String message = "Invalid CORS request; Origin=" + origin + ";Method=" + method;
    if (accessControlRequestHeaders != null) {
        message = message + ";Access-Control-Request-Headers=" + accessControlRequestHeaders;
    }
    response.setContentType("text/plain");
    response.setStatus(HttpServletResponse.SC_FORBIDDEN);
    response.resetBuffer();

    log(message);
}