Example usage for com.vaadin.server VaadinResponse setHeader

Introduction

In this page you can find the example usage for com.vaadin.server VaadinResponse setHeader.

Prototype

public void setHeader(String name, String value);

Source Link

Document

Sets the value of a generic response header.

Usage

From source file:com.haulmont.cuba.web.sys.CubaWebJarsHandler.java

License:Apache License

@Override
public boolean handleRequest(VaadinSession session, VaadinRequest request, VaadinResponse response)
        throws IOException {
    String path = request.getPathInfo();

    if (StringUtils.isEmpty(path) || StringUtils.isNotEmpty(path) && !path.startsWith(VAADIN_WEBJARS_PREFIX)) {
        return false;
    }//from   w w w .j a  v a  2 s.co m

    log.trace("WebJar resource requested: {}", path.replace(VAADIN_WEBJARS_PREFIX, ""));

    String errorMessage = checkResourcePath(path);
    if (StringUtils.isNotEmpty(errorMessage)) {
        log.warn(errorMessage);
        response.sendError(HttpServletResponse.SC_FORBIDDEN, errorMessage);
        return false;
    }

    URL resourceUrl = getStaticResourceUrl(path);

    if (resourceUrl == null) {
        resourceUrl = getClassPathResourceUrl(path);
    }

    if (resourceUrl == null) {
        String msg = String.format("Requested WebJar resource is not found: %s", path);
        response.sendError(HttpServletResponse.SC_NOT_FOUND, msg);
        log.warn(msg);
        return false;
    }

    String resourceName = getResourceName(path);
    String mimeType = servletContext.getMimeType(resourceName);
    response.setContentType(mimeType != null ? mimeType : FileTypesHelper.DEFAULT_MIME_TYPE);

    String cacheControl = "public, max-age=0, must-revalidate";
    int resourceCacheTime = getCacheTime(resourceName);
    if (resourceCacheTime > 0) {
        cacheControl = "max-age=" + String.valueOf(resourceCacheTime);
    }
    response.setHeader("Cache-Control", cacheControl);
    response.setDateHeader("Expires", System.currentTimeMillis() + (resourceCacheTime * 1000));

    InputStream inputStream = null;
    try {
        URLConnection connection = resourceUrl.openConnection();
        long lastModifiedTime = connection.getLastModified();
        // Remove milliseconds to avoid comparison problems (milliseconds
        // are not returned by the browser in the "If-Modified-Since"
        // header).
        lastModifiedTime = lastModifiedTime - lastModifiedTime % 1000;
        response.setDateHeader("Last-Modified", lastModifiedTime);

        if (browserHasNewestVersion(request, lastModifiedTime)) {
            response.setStatus(HttpServletResponse.SC_NOT_MODIFIED);
            return true;
        }

        inputStream = connection.getInputStream();

        copy(inputStream, response.getOutputStream());

        return true;
    } finally {
        if (inputStream != null) {
            inputStream.close();
        }
    }
}

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From source file:de.uni_tuebingen.qbic.qbicmainportlet.ProxyForGenomeViewerRestApi.java

License:Open Source License

@Override
public boolean handleRequest(VaadinSession session, VaadinRequest request, VaadinResponse response)
        throws IOException {
    if (UI.getCurrent() != null && UI.getCurrent().getPage() != null
            && UI.getCurrent().getPage().getUriFragment() != null) {
        System.out.println(UI.getCurrent().getPage().getUriFragment());
    }/*from  w w w.j a v  a 2  s  .co  m*/
    System.out.println("is handling request");
    System.out.println(request.getPathInfo());
    System.out.println(request.getContextPath());
    PortletRequest portletRequest = VaadinPortletService.getCurrentPortletRequest();
    Map<String, String[]> para = request.getParameterMap();
    Set<Entry<String, String[]>> s = para.entrySet();
    Iterator<Entry<String, String[]>> it = s.iterator();
    while (it.hasNext()) {
        Entry<String, String[]> en = it.next();
        System.out.println("Key: " + en.getKey());
        System.out.println("Value:");
        for (int i = 0; i < en.getValue().length; i++) {
            System.out.println(en.getValue()[i]);
        }
        System.out.println("Next");
    }
    Enumeration<String> enu = portletRequest.getParameterNames();
    while (enu.hasMoreElements()) {
        String su = enu.nextElement();
        System.out.println(su + " " + portletRequest.getParameter(su));
    }
    enu = portletRequest.getPropertyNames();
    while (enu.hasMoreElements()) {
        String su = enu.nextElement();
        System.out.println(su + " " + portletRequest.getProperty(su));
    }
    HttpServletRequest httpRequest = PortalUtil.getHttpServletRequest(portletRequest);
    System.out.println(httpRequest.getPathInfo());
    enu = httpRequest.getParameterNames();
    while (enu.hasMoreElements()) {
        String su = enu.nextElement();
        System.out.println(su + " " + httpRequest.getParameter(su));
    }
    System.out.println(httpRequest.getQueryString());
    enu = PortalUtil.getOriginalServletRequest(httpRequest).getParameterNames();
    System.out.println(PortalUtil.getOriginalServletRequest(httpRequest).getPathInfo());
    while (enu.hasMoreElements()) {
        String su = enu.nextElement();
        System.out.println(su + " " + PortalUtil.getOriginalServletRequest(httpRequest).getParameter(su));
    }

    if (!String.valueOf(session).equals(request.getPathInfo())) {
        return false;
    }

    String fileId = request.getParameter("fileId");
    String filepaths = request.getParameter("filepath");
    String removeZeroGenotypes = request.getParameter("removeZeroGenotypes");
    String region = request.getParameter("region");
    String interval = request.getParameter("interval");
    String histogram = request.getParameter("histogram");

    URL u;
    try {
        StringBuilder sb = new StringBuilder();
        sb.append(ConfigurationManagerFactory.getInstance().getGenomeViewerRestApiUrl());
        sb.append(fileId);
        sb.append("/fetch?filepaths=");
        sb.append(filepaths);
        sb.append("&region=");
        sb.append(region);
        if (interval != null) {
            sb.append("&interval=");
            sb.append(interval);
        }
        if (histogram != null) {
            sb.append("&histogram=");
            sb.append(histogram);
        }
        if (removeZeroGenotypes != null) {
            sb.append("");
        }
        u = new URL(sb.toString());
        // u = new
        // URL("http://localhost:7777/vizrest/rest/data/QBAMS001AB.bam/fetch?filepaths=/store/1/0EEF79A2-8140-4FC7-BA67-E51908FE4619/f0/91/36/20141116104428925-3161/original/QBAMS001AB.bam&removeZeroGenotypes=false&region=9:117163200-117164799,9:117164800-117166399,9:117166400-117167999,9:117168000-117169599&interval=1600&h");
        URLConnection urlConnection = u.openConnection();

        urlConnection.setUseCaches(false);
        urlConnection.setDoOutput(false);
        urlConnection.connect();
        InputStream is = urlConnection.getInputStream();
        response.setContentType("application/json");
        response.setHeader("Content-Type", "application/json");
        OutputStream out = response.getOutputStream();
        byte[] buffer = new byte[com.vaadin.server.Constants.DEFAULT_BUFFER_SIZE];
        while (true) {
            int readCount = is.read(buffer);
            if (readCount < 0) {
                break;
            }
            out.write(buffer, 0, readCount);
        }

    } catch (MalformedURLException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    return true;
}

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