com.vaadin.server.VaadinResponse Java Examples

protected boolean handleFileNotFoundException(Exception exception, VaadinResponse response) {
    if (!(exception instanceof RuntimeFileStorageException)) {
        return false;
    }

    FileStorageException storageException = ((RuntimeFileStorageException) exception).getCause();
    if (storageException.getType() == FileStorageException.Type.FILE_NOT_FOUND) {
        try {
            writeFileNotFoundException(response, messages.formatMessage(
                    getClass(), "fileNotFound.message", storageException.getFileName()));
            return true;
        } catch (IOException e) {
            log.debug("Can't write file not found exception to the response body for: {}",
                    storageException.getFileName(), e);
            return false;
        }
    } else {
        return false;
    }
}
 

@Override
public boolean synchronizedHandleRequest(VaadinSession session, VaadinRequest request, VaadinResponse response) throws IOException {
  response.setContentType("text/css");

  byte[] text = generateCss();

  response.setCacheTime(-1);
  response.setStatus(HttpURLConnection.HTTP_OK);

  try (OutputStream stream = response.getOutputStream()) {
    response.setContentLength(text.length);
    stream.write(text);
  }

  return true;
}
 

protected void writeFileNotFoundException(VaadinResponse response, String message) throws IOException {
    response.setStatus(SC_NOT_FOUND);
    response.setHeader("Content-Type", "text/html; charset=utf-8");

    PrintWriter writer = response.getWriter();
    writer.write("<h1 style=\"font-size:40px;\">404</h1><p style=\"font-size: 25px\">" + message + "</p>");
    writer.flush();
}
 

@Override
public boolean handleRequest(VaadinSession session, VaadinRequest request,
        VaadinResponse response) throws IOException {
    if (request.getParameter("code") != null) {
        String code = request.getParameter("code");
        Verifier v = new Verifier(code);
        Token t = service.getAccessToken(null, v);

        OAuthRequest r = new OAuthRequest(Verb.GET,
                "https://www.googleapis.com/plus/v1/people/me");
        service.signRequest(t, r);
        Response resp = r.send();

        GooglePlusAnswer answer = new Gson().fromJson(resp.getBody(),
                GooglePlusAnswer.class);

        userSession.login(answer.emails[0].value, answer.displayName);

        close();
        VaadinSession.getCurrent().removeRequestHandler(this);

        ((VaadinServletResponse) response).getHttpServletResponse().
                sendRedirect(redirectUrl);
        return true;
    }

    return false;
}
 

@Override
public boolean handleRequest(VaadinSession session, VaadinRequest request, VaadinResponse response) throws IOException {
    String path = request.getPathInfo();
    if (StringUtils.isEmpty(path)
            || !path.startsWith(VAADIN_WEBJARS_PATH_PREFIX)) {
        return false;
    }

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

    long resourceCacheTime = getCacheTime();

    String cacheControl = resourceCacheTime > 0
            ? "max-age=" + String.valueOf(resourceCacheTime)
            : "public, max-age=0, no-cache, no-store, must-revalidate";
    response.setHeader("Cache-Control", cacheControl);

    long expires = resourceCacheTime > 0
            ? System.currentTimeMillis() + (resourceCacheTime * 1000)
            : 0;
    response.setDateHeader("Expires", expires);

    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();
        }
    }
}
 

@Override
public boolean handleConnectorRequest(VaadinRequest request,
		VaadinResponse response, String path) throws IOException {
	this.getResource().setFilename(this.resource.getFilename());
	return super.handleConnectorRequest(request, response, path);
}