Example usage for javax.servlet.http HttpServletResponse setDateHeader

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

  1. HOME
  2. Java
  3. javax
  4. javax.servlet.http.*
  5. HttpServletResponse
  6. setDateHeader

Introduction

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

Prototype

public void setDateHeader(String name, long date);

Source Link

Document

Sets a response header with the given name and date-value.

Usage

From source file:io.fabric8.apiman.ui.ConfigurationServlet.java

/**
 * @see javax.servlet.http.HttpServlet#doGet(javax.servlet.http.HttpServletRequest,
 *      javax.servlet.http.HttpServletResponse)
 * Grabs the authToken from the user's sessions and sticks it in the config.js using
 * a token replacement of the token '@token@'.
 *///from   w  ww.j a va2  s .c o  m
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {
    String authToken = (String) request.getSession().getAttribute(LinkServlet.AUTH_TOKEN);
    log.info("AuthToken = " + authToken);
    InputStream is = null;
    String configFile = null;
    if (authToken == null) {
        log.debug("No authToken in the user's session with id " + request.getSession().getId());
        is = getClass().getResourceAsStream("/apimanui/apiman/f8-config-bkwrds-compatible.js");
        configFile = IOUtils.toString(is);
    } else {
        is = getClass().getResourceAsStream("/apimanui/apiman/f8-config.js");
        configFile = IOUtils.toString(is);
        configFile = configFile.replace("@token@", authToken);
    }
    try {
        response.setCharacterEncoding("UTF-8");
        response.setContentType("application/javascript");
        response.setHeader("Cache-Control", "private, no-store, no-cache, must-revalidate");
        response.setDateHeader("Expires", 0);
        response.getOutputStream().write(configFile.getBytes("UTF-8")); //$NON-NLS-1$ //$NON-NLS-2$
    } catch (Exception e) {
        throw new ServletException(e);
    } finally {
        IOUtils.closeQuietly(is);
    }
}

From source file:org.polymap.service.geoserver.spring.PipelineMapProducer.java

public void writeTo(final OutputStream out) throws ServiceException, IOException {
    Timer timer = new Timer();

    // single layer? -> request ENCODED_IMAGE
    if (mapContext.getLayerCount() == 1) {
        MapLayer mapLayer = mapContext.getLayers()[0];
        ILayer layer = loader.findLayer(mapLayer);
        try {//  ww w  .  j  av  a 2  s .c  o m
            Pipeline pipeline = loader.getOrCreatePipeline(layer, LayerUseCase.ENCODED_IMAGE);

            ProcessorRequest request = prepareProcessorRequest();
            pipeline.process(request, new ResponseHandler() {
                public void handle(ProcessorResponse pipeResponse) throws Exception {

                    HttpServletResponse response = GeoServerWms.response.get();
                    if (pipeResponse == EncodedImageResponse.NOT_MODIFIED) {
                        log.info("Response: 304!");
                        response.setStatus(304);
                    } else {
                        long lastModified = ((EncodedImageResponse) pipeResponse).getLastModified();
                        // allow caches and browser clients to cache for 1h
                        //response.setHeader( "Cache-Control", "public,max-age=3600" );
                        if (lastModified > 0) {
                            response.setHeader("Cache-Control", "no-cache,must-revalidate");
                            response.setDateHeader("Last-Modified", lastModified);
                        } else {
                            response.setHeader("Cache-Control", "no-cache,must-revalidate");
                            response.setDateHeader("Expires", 0);
                        }

                        byte[] chunk = ((EncodedImageResponse) pipeResponse).getChunk();
                        int len = ((EncodedImageResponse) pipeResponse).getChunkSize();
                        out.write(chunk, 0, len);
                    }
                }
            });
            log.debug("    flushing response stream. (" + timer.elapsedTime() + "ms)");
            out.flush();
        } catch (IOException e) {
            throw e;
        } catch (Exception e) {
            throw new IOException(e);
        }
    }

    // multiple layers -> render into one image
    else {
        List<Job> jobs = new ArrayList();
        final Map<MapLayer, Image> images = new HashMap();

        // run jobs for all layers
        for (final MapLayer mapLayer : mapContext.getLayers()) {
            final ILayer layer = loader.findLayer(mapLayer);
            // job
            UIJob job = new UIJob(getClass().getSimpleName() + ": " + layer.getLabel()) {
                protected void runWithException(IProgressMonitor monitor) throws Exception {
                    try {
                        // XXX this excludes Cache304 (which support EncodedImageResponse only)
                        Pipeline pipeline = loader.getOrCreatePipeline(layer, LayerUseCase.IMAGE);

                        GetMapRequest targetRequest = prepareProcessorRequest();
                        pipeline.process(targetRequest, new ResponseHandler() {
                            public void handle(ProcessorResponse pipeResponse) throws Exception {
                                Image layerImage = ((ImageResponse) pipeResponse).getImage();
                                images.put(mapLayer, layerImage);
                            }
                        });
                    } catch (Exception e) {
                        // XXX put a special image in the map
                        log.warn("", e);
                        images.put(mapLayer, null);
                        throw e;
                    }
                }
            };
            job.schedule();
            jobs.add(job);
        }

        // join jobs
        for (Job job : jobs) {
            try {
                job.join();
            } catch (InterruptedException e) {
                // XXX put a special image in the map
                log.warn("", e);
            }
        }

        // put images together (MapContext order)
        Graphics2D g = null;
        try {
            // result image
            BufferedImage result = ImageUtils.createImage(mapContext.getMapWidth(), mapContext.getMapHeight(),
                    null, true);
            g = result.createGraphics();

            // rendering hints
            RenderingHints hints = new RenderingHints(RenderingHints.KEY_RENDERING,
                    RenderingHints.VALUE_RENDER_QUALITY);
            hints.add(new RenderingHints(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON));
            hints.add(new RenderingHints(RenderingHints.KEY_TEXT_ANTIALIASING,
                    RenderingHints.VALUE_TEXT_ANTIALIAS_ON));
            g.setRenderingHints(hints);

            for (MapLayer mapLayer : mapContext.getLayers()) {
                Image layerImage = images.get(mapLayer);

                // load image data
                //                  new javax.swing.ImageIcon( image ).getImage();

                ILayer layer = loader.findLayer(mapLayer);
                int rule = AlphaComposite.SRC_OVER;
                float alpha = ((float) layer.getOpacity()) / 100;

                g.setComposite(AlphaComposite.getInstance(rule, alpha));
                g.drawImage(layerImage, 0, 0, null);
            }
            encodeImage(result, out);
        } finally {
            if (g != null) {
                g.dispose();
            }
        }
    }
}

From source file:org.seasar.s2click.S2ClickPage.java

/**
 * ????/*  w  w  w.j  a  v a 2  s. com*/
 *
 * @param contentType 
 * @param contents ??
 */
protected void renderResponse(String contentType, InputStream contents) {
    HttpServletResponse res = getContext().getResponse();

    // ????????
    Map<String, Object> headers = getHeaders();

    for (Iterator<Map.Entry<String, Object>> i = headers.entrySet().iterator(); i.hasNext();) {
        Map.Entry<String, Object> entry = i.next();
        String name = entry.getKey().toString();
        Object value = entry.getValue();

        if (value instanceof String) {
            String strValue = (String) value;
            if (!strValue.equalsIgnoreCase("Content-Encoding")) {
                res.setHeader(name, strValue);
            }

        } else if (value instanceof Date) {
            long time = ((Date) value).getTime();
            res.setDateHeader(name, time);

        } else {
            int intValue = ((Integer) value).intValue();
            res.setIntHeader(name, intValue);
        }
    }

    OutputStream out = null;

    try {
        res.setContentLength(contents.available());
        res.setContentType(contentType);
        out = res.getOutputStream();
        IOUtils.copy(contents, out);
        res.flushBuffer();

    } catch (Exception ex) {
        throw new RuntimeException(ex);

    } finally {
        IOUtils.closeQuietly(contents);
        IOUtils.closeQuietly(out);
        getContext().setRequestAttribute(SKIP_RENDERING, "true");
    }
}

From source file:org.apache.abdera.protocol.server.servlet.AbderaServlet.java

private void output(HttpServletRequest request, HttpServletResponse response, ResponseContext context)
        throws IOException {
    if (context != null) {
        response.setStatus(context.getStatus());
        long cl = context.getContentLength();
        String cc = context.getCacheControl();
        if (cl > -1)
            response.setHeader("Content-Length", Long.toString(cl));
        if (cc != null && cc.length() > 0)
            response.setHeader("Cache-Control", cc);
        try {/*  w  ww. jav  a 2s .com*/
            MimeType ct = context.getContentType();
            if (ct != null)
                response.setContentType(ct.toString());
        } catch (Exception e) {
        }
        String[] names = context.getHeaderNames();
        for (String name : names) {
            Object[] headers = context.getHeaders(name);
            for (Object value : headers) {
                if (value instanceof Date)
                    response.setDateHeader(name, ((Date) value).getTime());
                else
                    response.setHeader(name, value.toString());
            }
        }
        if (!request.getMethod().equals("HEAD") && context.hasEntity()) {
            context.writeTo(response.getOutputStream());
        }
    } else {
        error("Internal Server Error", null, response);
    }
}

From source file:org.jolokia.http.AgentServlet.java

private void setNoCacheHeaders(HttpServletResponse pResp) {
    pResp.setHeader("Cache-Control", "no-cache");
    pResp.setHeader("Pragma", "no-cache");
    // Check for a date header and set it accordingly to the recommendations of
    // RFC-2616 (http://tools.ietf.org/html/rfc2616#section-14.21)
    ///*from   www  . j  av  a  2 s  .  c o  m*/
    //   "To mark a response as "already expired," an origin server sends an
    //    Expires date that is equal to the Date header value. (See the rules
    //  for expiration calculations in section 13.2.4.)"
    //
    // See also #71

    long now = System.currentTimeMillis();
    pResp.setDateHeader("Date", now);
    // 1h  in the past since it seems, that some servlet set the date header on their
    // own so that it cannot be guaranteed that these headers are really equals.
    // It happened on Tomcat that Date: was finally set *before* Expires: in the final
    // answers some times which seems to be an implementation peculiarity from Tomcat
    pResp.setDateHeader("Expires", now - 3600000);
}

From source file:edu.stanford.muse.webapp.JSPHelper.java

/**
 * makes the page un$able. warning: must be called before any part of the
 * response body is committed/*from   w ww. j  av a2s  .c om*/
 */
public static void setPageUncacheable(HttpServletResponse response) {
    // see http://stackoverflow.com/questions/5139785/how-to-prevent-the-result-of-servlets-from-being-cached
    response.setHeader("Cache-Control", "no-store, no-cache, must-revalidate");
    response.setHeader("Pragma", "no-cache");
    response.setHeader("Expires", "-1");

    // Set IE extended HTTP/1.1 no-cache headers (use addHeader).
    response.addHeader("Cache-Control", "post-check=0, pre-check=0");

    // Set standard HTTP/1.0 no-cache header.
    response.setDateHeader("Expires", 0); //prevent caching at the proxy server
}

From source file:org.eclipse.smarthome.ui.icon.internal.IconServlet.java

@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

    if (req.getDateHeader("If-Modified-Since") > startupTime) {
        resp.setStatus(304);/* w  w  w.ja v a  2s  .c o m*/
        return;
    }

    String category = getCategory(req);
    Format format = getFormat(req);
    String state = getState(req);
    String iconSetId = getIconSetId(req);

    IconProvider topProvider = null;
    int maxPrio = Integer.MIN_VALUE;
    for (IconProvider provider : iconProvider) {
        Integer prio = provider.hasIcon(category, iconSetId, format);
        if (prio != null && prio > maxPrio) {
            maxPrio = prio;
            topProvider = provider;
        }
    }
    if (topProvider != null) {
        if (format.equals(Format.SVG)) {
            resp.setContentType("image/svg+xml");
        } else {
            resp.setContentType("image/png");
        }
        resp.setDateHeader("Last-Modified", new Date().getTime());
        ServletOutputStream os = resp.getOutputStream();
        try (InputStream is = topProvider.getIcon(category, iconSetId, state, format)) {
            IOUtils.copy(is, os);
            resp.flushBuffer();
        } catch (IOException e) {
            logger.error("Failed sending the icon byte stream as a response: {}", e.getMessage());
            resp.sendError(500, e.getMessage());
        }
    } else {
        resp.sendError(404);
    }
}

From source file:org.rhq.enterprise.gui.client.RemoteClientServlet.java

private void getDownload(HttpServletRequest req, HttpServletResponse resp)
        throws ServletException, IOException {
    int limit = getDownloadLimit();
    if (limit <= 0) {
        sendErrorDownloadDisabled(resp);
        return;/*from   ww  w .  j  ava2  s  .  co  m*/
    } else if (limit < numActiveDownloads) {
        sendErrorTooManyDownloads(resp);
        return;
    }

    try {
        File zip = getRemoteClientZip();
        if (!zip.exists()) {
            disableBrowserCache(resp);
            resp.sendError(HttpServletResponse.SC_NOT_FOUND,
                    "Remote Client binary does not exist: " + zip.getName());
            return;
        }

        resp.setContentType("application/octet-stream");
        resp.setHeader("Content-Disposition", "attachment; filename=" + zip.getName());
        resp.setContentLength((int) zip.length());
        resp.setDateHeader("Last-Modified", zip.lastModified());

        FileInputStream zipStream = new FileInputStream(zip);
        try {
            StreamUtil.copy(zipStream, resp.getOutputStream(), false);
        } finally {
            zipStream.close();
        }
    } catch (Throwable t) {
        log.error("Failed to stream remote client zip.", t);
        disableBrowserCache(resp);
        resp.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR, "Failed to stream remote client zip");
    }

    return;
}

From source file:org.openmrs.web.servlet.AbstractGraphServlet.java

protected void doGet(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {

    try {/* w w  w.  j a va 2  s.co  m*/
        // Set default values
        Integer width = Integer.valueOf(500);
        Integer height = Integer.valueOf(300);
        String mimeType = PNG_MIME_TYPE;

        // Retrieve custom values
        try {
            width = Integer.parseInt(request.getParameter("width"));
        } catch (Exception e) {
            log.error("Error during width parseInt", e);
        }

        try {
            height = Integer.parseInt(request.getParameter("height"));
        } catch (Exception e) {
            log.error("Error during height parseInt", e);
        }

        if (request.getParameter("mimeType") != null) {
            mimeType = request.getParameter("mimeType");
        }

        JFreeChart chart = createChart(request, response);

        // Modify response to disable caching
        response.setHeader("Pragma", "No-cache");
        response.setDateHeader("Expires", 0);
        response.setHeader("Cache-Control", "no-cache");

        // Write chart out to response as image 
        try {
            if (JPG_MIME_TYPE.equalsIgnoreCase(mimeType)) {
                response.setContentType(JPG_MIME_TYPE);
                ChartUtilities.writeChartAsJPEG(response.getOutputStream(), chart, width, height);
            } else if (PNG_MIME_TYPE.equalsIgnoreCase(mimeType)) {
                response.setContentType(PNG_MIME_TYPE);
                ChartUtilities.writeChartAsPNG(response.getOutputStream(), chart, width, height);
            } else {
                // Throw exception: unsupported mime type
            }
        } catch (IOException e) {
            log.error(e);
        }

    }
    // Add error handling above and remove this try/catch 
    catch (Exception e) {
        log.error(e);
    }
}