Example usage for javax.servlet.http HttpServletResponse reset

Introduction

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

Prototype

public void reset();

Source Link

Document

Clears any data that exists in the buffer as well as the status code, headers.

Usage

From source file:net.sourceforge.fenixedu.presentationTier.backBeans.departmentMember.teacherService.ViewTeacherService.java

public void exportTeacherServiceByCourseToXLS() throws FenixServiceException, IOException {
    if (this.executionCourseServiceDTO == null) {
        loadDistributionServiceDataByCourse();
    }//from w  w w  .  java2 s.c o m

    final StyledExcelSpreadsheet spreadsheet = new StyledExcelSpreadsheet("teacher distribution");
    fillSpreadSheetHeaders(spreadsheet);
    fillSpreadSheedResults(spreadsheet);

    FacesContext fc = FacesContext.getCurrentInstance();
    HttpServletResponse response = (HttpServletResponse) fc.getExternalContext().getResponse();

    String fileName = "file.xls";
    String contentType = "application/vnd.ms-excel";

    response.reset();
    response.setContentType(contentType);
    response.setHeader("Content-Disposition", "attachment; filename=\"" + fileName + "\"");

    OutputStream output = response.getOutputStream();
    spreadsheet.getWorkbook().write(output);

    fc.responseComplete();
}

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From source file:fedora.server.security.servletfilters.FilterEnforceAuthn.java

@Override
public boolean doThisSubclass(ExtendedHttpServletRequest request, HttpServletResponse response)
        throws Throwable {
    String method = "doThisSubclass() ";
    if (log.isDebugEnabled()) {
        log.debug(enter(method));/*from   ww w .  ja  v  a 2s .c om*/
    }
    super.doThisSubclass(request, response);
    request.lockWrapper();

    boolean terminateServletFilterChain = request.getUserPrincipal() == null;
    if (terminateServletFilterChain) {
        if (log.isDebugEnabled()) {
            log.debug(format(method, "no principal found, sending 401"));
        }
        String realm = "fedora";
        String value = "BASIC realm=\"" + realm + "\"";
        String name = "WWW-Authenticate";
        int sc = HttpServletResponse.SC_UNAUTHORIZED;
        response.reset();
        //httpServletResponse.sendError(sc, "supply credentials"); //same as after
        if (response.containsHeader(name)) {
            response.setHeader(name, value);
        } else {
            response.addHeader(name, value);
        }
        try {
            response.sendError(sc, "supply credentials");
        } catch (IOException e1) {
            // TODO Auto-generated catch block
            e1.printStackTrace();
        } //here, no bad auth msg at wget
        response.setContentType("text/plain");
        try {
            response.flushBuffer();
        } catch (IOException e) {
            showThrowable(e, log, "response flush error");
        }
    }
    return terminateServletFilterChain;
}

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From source file:org.springframework.boot.context.web.ErrorPageFilter.java

private void forwardToErrorPage(String path, HttpServletRequest request, HttpServletResponse response,
        Throwable ex) throws ServletException, IOException {
    if (logger.isErrorEnabled()) {
        String message = "Forwarding to error page from request " + getDescription(request)
                + " due to exception [" + ex.getMessage() + "]";
        logger.error(message, ex);/*from  w  ww.  j ava  2 s .c o  m*/
    }
    setErrorAttributes(request, 500, ex.getMessage());
    request.setAttribute(ERROR_EXCEPTION, ex);
    request.setAttribute(ERROR_EXCEPTION_TYPE, ex.getClass().getName());
    response.reset();
    response.sendError(500, ex.getMessage());
    request.getRequestDispatcher(path).forward(request, response);
}

---

From source file:com.feilong.controller.DownloadController.java

public HttpServletResponse download(String path, HttpServletResponse response) {
    try {/* w w  w .jav  a 2  s  . c  om*/
        // path
        File file = new File(path);
        // ???
        String filename = file.getName();
        // ????
        String ext = filename.substring(filename.lastIndexOf(".") + 1).toUpperCase();

        // ??
        InputStream fis = new BufferedInputStream(new FileInputStream(path));
        byte[] buffer = new byte[fis.available()];
        fis.read(buffer);
        fis.close();
        // response
        response.reset();
        // responseHeader
        response.addHeader("Content-Disposition", "attachment;filename=" + new String(filename.getBytes()));
        response.addHeader("Content-Length", "" + file.length());
        OutputStream toClient = new BufferedOutputStream(response.getOutputStream());
        response.setContentType("application/octet-stream");
        toClient.write(buffer);
        toClient.flush();
        toClient.close();
    } catch (IOException ex) {
        ex.printStackTrace();
    }
    return response;
}

---

From source file:de.digitalcollections.streaming.euphoria.controller.StreamingController.java

/**
 * Create response for the request.//from w w w.  j  a v a 2s. c  o m
 *
 * @param id The id of requested content.
 * @param extension The (target) file extension/format of requested content.
 * @param request The request to be responded to.
 * @param response The response to the request.
 * @param head "true" if response body should be written (GET) or "false" if not (HEAD).
 * @throws IOException If something fails at I/O level.
 */
private void respond(String id, String extension, HttpServletRequest request, HttpServletResponse response,
        boolean head) throws IOException {
    logRequestHeaders(request);

    response.reset();

    // try to get access to resource
    Resource resource;
    try {
        resource = getResource(id, extension);
    } catch (ResourceIOException ex) {
        LOGGER.warn("*** Response {}: Error referencing streaming resource with id {} and extension {}",
                HttpServletResponse.SC_NOT_FOUND, id, extension);
        response.sendError(HttpServletResponse.SC_NOT_FOUND);
        return;
    }

    // get resource metadata
    ResourceInfo resourceInfo = new ResourceInfo(id, resource);
    if (resourceInfo.length <= 0) {
        LOGGER.warn("*** Response {}: Error streaming resource with id {} and extension {}: not found/no size",
                HttpServletResponse.SC_NOT_FOUND, id, extension);
        response.sendError(HttpServletResponse.SC_NOT_FOUND);
        return;
    }

    if (preconditionFailed(request, resourceInfo)) {
        LOGGER.warn(
                "*** Response {}: Precondition If-Match/If-Unmodified-Since failed for resource with id {} and extension {}.",
                HttpServletResponse.SC_PRECONDITION_FAILED, id, extension);
        response.sendError(HttpServletResponse.SC_PRECONDITION_FAILED);
        return;
    }

    setCacheHeaders(response, resourceInfo);

    if (notModified(request, resourceInfo)) {
        LOGGER.debug("*** Response {}: 'Not modified'-response for resource with id {} and extension {}.",
                HttpServletResponse.SC_NOT_MODIFIED, id, extension);
        response.setStatus(HttpServletResponse.SC_NOT_MODIFIED);
        return;
    }

    List<Range> ranges = getRanges(request, resourceInfo);

    if (ranges == null) {
        response.setHeader("Content-Range", "bytes */" + resourceInfo.length);
        LOGGER.warn("Response {}: Header Range for resource with id {} and extension {} not satisfiable",
                HttpServletResponse.SC_REQUESTED_RANGE_NOT_SATISFIABLE, id, extension);
        response.sendError(HttpServletResponse.SC_REQUESTED_RANGE_NOT_SATISFIABLE);
        return;
    }

    if (!ranges.isEmpty()) {
        response.setStatus(HttpServletResponse.SC_PARTIAL_CONTENT);
    } else {
        ranges.add(new Range(0, resourceInfo.length - 1)); // Full content.
    }

    String contentType = setContentHeaders(request, response, resourceInfo, ranges);
    boolean acceptsGzip = false;
    // If content type is text, then determine whether GZIP content encoding is supported by
    // the browser and expand content type with the one and right character encoding.
    if (contentType.startsWith("text")) {
        String acceptEncoding = request.getHeader("Accept-Encoding");
        acceptsGzip = acceptEncoding != null && accepts(acceptEncoding, "gzip");
        contentType += ";charset=UTF-8";
    }

    if (head) {
        return;
    }

    writeContent(response, resource, resourceInfo, ranges, contentType, acceptsGzip);
    LOGGER.debug("*** RESPONSE FINISHED ***");
}

---

From source file:de.unirostock.sems.caroweb.Converter.java

private void checkout(HttpServletRequest request, HttpServletResponse response, Path storage, String req)
        throws ServletException, IOException {
    Path target = storage.resolve(req).toAbsolutePath().normalize();
    if (!target.startsWith(storage) || !Files.exists(target)) {
        error(request, response, "you're not allowed to download that file.");
        return;/*  www  .java  2 s  . c om*/
    }

    try {
        String mime = target.toString().endsWith("omex") ? "application/zip"
                : "application/vnd.wf4ever.robundle+zip";

        response.reset();
        response.setBufferSize(CaRoWebutils.DEFAULT_BUFFER_SIZE);
        response.setContentType(mime);
        response.setHeader("Content-Length", String.valueOf(target.toFile().length()));
        response.setHeader("Content-Disposition", "attachment; filename=\"" + req + "\"");
        response.setHeader("Expires", CaRoWebutils.downloadDateFormater
                .format(new Date(System.currentTimeMillis() + CaRoWebutils.CACHE_TIME * 1000)));
        response.setHeader("Cache-Control", "max-age=" + CaRoWebutils.CACHE_TIME);
        response.setHeader("Last-Modified", CaRoWebutils.downloadDateFormater
                .format(new Date(Files.getLastModifiedTime(target).toMillis())));
        response.setHeader("ETag", GeneralTools.hash(target + "-" + Files.getLastModifiedTime(target)));

        BufferedInputStream input = new BufferedInputStream(new FileInputStream(target.toFile()),
                CaRoWebutils.DEFAULT_BUFFER_SIZE);
        BufferedOutputStream output = new BufferedOutputStream(response.getOutputStream(),
                CaRoWebutils.DEFAULT_BUFFER_SIZE);

        // pass the stream to client
        byte[] buffer = new byte[CaRoWebutils.DEFAULT_BUFFER_SIZE];
        int length;
        while ((length = input.read(buffer)) > 0) {
            output.write(buffer, 0, length);
        }

        input.close();
        output.close();

        return;
    } catch (IOException e) {
        // whoops, that's our fault. shouldn't happen. hopefully.
        LOGGER.error("unable to dump file " + target + " (at least not in an expected form)");
    }
    error(request, response, "couldn't dump file");
}

---

From source file:com.iyonger.apm.web.controller.FileEntryController.java

/**
 * Download file entry of given path.//from  w  ww .j a va 2  s. com
 *
 * @param user     current user
 * @param path     user
 * @param response response
 */
@RequestMapping("/download/**")
public void download(User user, String path, HttpServletResponse response) {
    FileEntry fileEntry = fileEntryService.getOne(user, path);
    if (fileEntry == null) {
        LOG.error("{} requested to download not existing file entity {}", user.getUserId(), path);
        return;
    }
    response.reset();
    try {
        response.addHeader("Content-Disposition", "attachment;filename="
                + java.net.URLEncoder.encode(FilenameUtils.getName(fileEntry.getPath()), "utf8"));
    } catch (UnsupportedEncodingException e1) {
        LOG.error(e1.getMessage(), e1);
    }
    response.setContentType("application/octet-stream; charset=UTF-8");
    response.addHeader("Content-Length", "" + fileEntry.getFileSize());
    byte[] buffer = new byte[4096];
    ByteArrayInputStream fis = null;
    OutputStream toClient = null;
    try {
        fis = new ByteArrayInputStream(fileEntry.getContentBytes());
        toClient = new BufferedOutputStream(response.getOutputStream());
        int readLength;
        while (((readLength = fis.read(buffer)) != -1)) {
            toClient.write(buffer, 0, readLength);
        }
    } catch (IOException e) {
        throw processException("error while download file", e);
    } finally {
        IOUtils.closeQuietly(fis);
        IOUtils.closeQuietly(toClient);
    }
}

---

From source file:org.apache.roller.planet.ui.rendering.servlets.HomepageServlet.java

/**
 * Handle GET requests for weblog feeds.
 *//*from   w  w w . j  a  va2s .co  m*/
public void doGet(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {

    log.debug("Entering");

    // set content type
    response.setContentType("text/html; charset=utf-8");

    // initialize model
    HashMap model = new HashMap();
    try {
        // populate the rendering model
        Map initData = new HashMap();

        // Load models for pages
        String models = PlanetConfig.getProperty("rendering.homepageModels");
        ModelLoader.loadModels(models, model, initData, true);

    } catch (PlanetException ex) {
        log.error("ERROR loading model", ex);

        if (!response.isCommitted())
            response.reset();
        response.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
        return;
    }

    // lookup Renderer we are going to use
    Renderer renderer = null;
    try {
        log.debug("Looking up renderer");

        // what template are we going to render?
        Template template = new StaticTemplate("home.vm", null, "velocity");

        // get the Renderer
        renderer = RendererManager.getRenderer(template);

    } catch (Exception e) {
        // nobody wants to render my content :(

        if (!response.isCommitted())
            response.reset();
        response.sendError(HttpServletResponse.SC_NOT_FOUND);
        return;
    }

    // render content
    try {
        log.debug("Doing rendering");
        renderer.render(model, response.getWriter());
    } catch (Exception e) {
        // bummer, error during rendering
        log.error("Error during rendering", e);

        if (!response.isCommitted())
            response.reset();
        response.sendError(HttpServletResponse.SC_NOT_FOUND);
        return;
    }

    // post rendering process

    // flush rendered content to response
    log.debug("Flushing response output");
    //response.setContentLength(rendererOutput.getContent().length);
    //response.getOutputStream().write(rendererOutput.getContent());

    log.debug("Exiting");
}

---

From source file:org.springframework.boot.web.servlet.support.ErrorPageFilter.java

private void forwardToErrorPage(String path, HttpServletRequest request, HttpServletResponse response,
        Throwable ex) throws ServletException, IOException {
    if (logger.isErrorEnabled()) {
        String message = "Forwarding to error page from request " + getDescription(request)
                + " due to exception [" + ex.getMessage() + "]";
        logger.error(message, ex);/*  w w w.  jav  a2  s .  c  o m*/
    }
    setErrorAttributes(request, 500, ex.getMessage());
    request.setAttribute(ERROR_EXCEPTION, ex);
    request.setAttribute(ERROR_EXCEPTION_TYPE, ex.getClass());
    response.reset();
    response.setStatus(500);
    request.getRequestDispatcher(path).forward(request, response);
    request.removeAttribute(ERROR_EXCEPTION);
    request.removeAttribute(ERROR_EXCEPTION_TYPE);
}

---

From source file:de.itsvs.cwtrpc.controller.RemoteServiceControllerServlet.java

protected void processUnexpectedFailure(HttpServletRequest request, HttpServletResponse response,
        Throwable exception) throws ServletException, IOException {
    log.error("Unexpected error while processing service request", exception);

    if (CwtRpcUtils.getRpcSessionInvalidationPolicy(request).isInvalidateOnUnexpectedException()) {
        invalidateSession(request);//from w  w w  .j a v  a2 s . c o  m
    }
    if (!response.isCommitted()) {
        response.reset();
        addNoCacheResponseHeaders(request, response);
        RPCServletUtils.writeResponseForUnexpectedFailure(getServletContext(), response, exception);
        /*
         * Flush all remaining output to the client (client can continue
         * immediately). Also response will be marked as being committed
         * (status may be required later by a filter).
         */
        response.flushBuffer();
    }
}

---

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