public abstract class BootstrapHandler implements RequestHandler {
- /** Cookie used to ignore browser checks */
- private static final String FORCE_LOAD_COOKIE = "vaadinforceload=1";
-
protected class BootstrapContext implements Serializable {
+
private final WrappedResponse response;
private final WrappedRequest request;
private final Application application;
WrappedRequest request, WrappedResponse response)
throws IOException {
- if (request.getBrowserDetails() != null) {
- // Check if the browser is supported; we'll activate Chrome Frame
- // silently if available.
- WebBrowser b = request.getBrowserDetails().getWebBrowser();
- if (b.isTooOldToFunctionProperly() && !b.isChromeFrameCapable()) {
- // bypass if cookie set
- String c = request.getHeader("Cookie");
- if (c == null || !c.contains(FORCE_LOAD_COOKIE)) {
- writeBrowserTooOldPage(request, response);
- return true;
- }
-
- }
- }
-
// TODO Should all urls be handled here?
int rootId;
try {
return true;
}
- /**
- * Writes a page encouraging the user to upgrade to a more current browser.
- *
- * @param request
- * @param response
- * @throws IOException
- */
- protected void writeBrowserTooOldPage(WrappedRequest request,
- WrappedResponse response) throws IOException {
- Writer page = response.getWriter();
- WebBrowser b = request.getBrowserDetails().getWebBrowser();
-
- page.write("<html><body><h1>I'm sorry, but your browser is not supported</h1>"
- + "<p>The version ("
- + b.getBrowserMajorVersion()
- + "."
- + b.getBrowserMinorVersion()
- + ") of the browser you are using "
- + " is outdated and not supported.</p>"
- + "<p>You should <b>consider upgrading</b> to a more up-to-date browser.</p> "
- + "<p>The most popular browsers are <b>"
- + " <a href=\"https://www.google.com/chrome\">Chrome</a>,"
- + " <a href=\"http://www.mozilla.com/firefox\">Firefox</a>,"
- + (b.isWindows() ? " <a href=\"http://windows.microsoft.com/en-US/internet-explorer/downloads/ie\">Internet Explorer</a>,"
- : "")
- + " <a href=\"http://www.opera.com/browser\">Opera</a>"
- + " and <a href=\"http://www.apple.com/safari\">Safari</a>.</b><br/>"
- + "Upgrading to the latest version of one of these <b>will make the web safer, faster and better looking.</b></p>"
- + (b.isIE() ? "<script type=\"text/javascript\" src=\"http://ajax.googleapis.com/ajax/libs/chrome-frame/1/CFInstall.min.js\"></script>"
- + "<p>If you can not upgrade your browser, please consider trying <a onclick=\"CFInstall.check({mode:'overlay'});return false;\" href=\"http://www.google.com/chromeframe\">Chrome Frame</a>.</p>"
- : "") //
- + "<p><sub><a onclick=\"document.cookie='"
- + FORCE_LOAD_COOKIE
- + "';window.location.reload();return false;\" href=\"#\">Continue without updating</a> (not recommended)</sub></p>"
- + "</body>\n" + "</html>");
-
- page.close();
- }
-
protected final void writeBootstrapPage(WrappedRequest request,
WrappedResponse response, Application application, int rootId)
throws IOException, JSONException {
--- /dev/null
+package com.vaadin.terminal.gwt.server;
+
+import java.io.IOException;
+import java.io.Writer;
+
+import com.vaadin.Application;
+import com.vaadin.terminal.RequestHandler;
+import com.vaadin.terminal.WrappedRequest;
+import com.vaadin.terminal.WrappedResponse;
+
+/**
+ * A {@link RequestHandler} that presents an informative page if the browser in
+ * use is unsupported. Recognizes Chrome Frame and allow it to be used.
+ *
+ * <p>
+ * This handler is a usually used as a singleton added to the application by
+ * {@link AbstractCommunicationManager}. It can be removed/replaced by doing
+ * something like this: <code><pre>
+ * application.removeRequestHandler(UnsupportedBrowserHandler.getInstance());
+ * </pre></code>
+ * </p>
+ */
+@SuppressWarnings("serial")
+public class UnsupportedBrowserHandler implements RequestHandler {
+
+ /** Cookie used to ignore browser checks */
+ public static final String FORCE_LOAD_COOKIE = "vaadinforceload=1";
+
+ private static UnsupportedBrowserHandler instance;
+
+ /**
+ * Get the {@link UnsupportedBrowserHandler} singleton instance.
+ *
+ * @return the {@link UnsupportedBrowserHandler} singleton
+ */
+ public static synchronized UnsupportedBrowserHandler getInstance() {
+ if (instance == null) {
+ instance = new UnsupportedBrowserHandler();
+ }
+ return instance;
+ }
+
+ @Override
+ public boolean handleRequest(Application application,
+ WrappedRequest request, WrappedResponse response)
+ throws IOException {
+
+ if (request.getBrowserDetails() != null) {
+ // Check if the browser is supported
+ // If Chrome Frame is available we'll assume it's ok
+ WebBrowser b = request.getBrowserDetails().getWebBrowser();
+ if (b.isTooOldToFunctionProperly() && !b.isChromeFrameCapable()) {
+ // bypass if cookie set
+ String c = request.getHeader("Cookie");
+ if (c == null || !c.contains(FORCE_LOAD_COOKIE)) {
+ writeBrowserTooOldPage(request, response);
+ return true; // request handled
+ }
+ }
+ }
+
+ return false; // pass to next handler
+ }
+
+ /**
+ * Writes a page encouraging the user to upgrade to a more current browser.
+ *
+ * @param request
+ * @param response
+ * @throws IOException
+ */
+ protected void writeBrowserTooOldPage(WrappedRequest request,
+ WrappedResponse response) throws IOException {
+ Writer page = response.getWriter();
+ WebBrowser b = request.getBrowserDetails().getWebBrowser();
+
+ page.write("<html><body><h1>I'm sorry, but your browser is not supported</h1>"
+ + "<p>The version ("
+ + b.getBrowserMajorVersion()
+ + "."
+ + b.getBrowserMinorVersion()
+ + ") of the browser you are using "
+ + " is outdated and not supported.</p>"
+ + "<p>You should <b>consider upgrading</b> to a more up-to-date browser.</p> "
+ + "<p>The most popular browsers are <b>"
+ + " <a href=\"https://www.google.com/chrome\">Chrome</a>,"
+ + " <a href=\"http://www.mozilla.com/firefox\">Firefox</a>,"
+ + (b.isWindows() ? " <a href=\"http://windows.microsoft.com/en-US/internet-explorer/downloads/ie\">Internet Explorer</a>,"
+ : "")
+ + " <a href=\"http://www.opera.com/browser\">Opera</a>"
+ + " and <a href=\"http://www.apple.com/safari\">Safari</a>.</b><br/>"
+ + "Upgrading to the latest version of one of these <b>will make the web safer, faster and better looking.</b></p>"
+ + (b.isIE() ? "<script type=\"text/javascript\" src=\"http://ajax.googleapis.com/ajax/libs/chrome-frame/1/CFInstall.min.js\"></script>"
+ + "<p>If you can not upgrade your browser, please consider trying <a onclick=\"CFInstall.check({mode:'overlay'});return false;\" href=\"http://www.google.com/chromeframe\">Chrome Frame</a>.</p>"
+ : "") //
+ + "<p><sub><a onclick=\"document.cookie='"
+ + FORCE_LOAD_COOKIE
+ + "';window.location.reload();return false;\" href=\"#\">Continue without updating</a> (not recommended)</sub></p>"
+ + "</body>\n" + "</html>");
+
+ page.close();
+ }
+}
\ No newline at end of file
projects / vaadin-framework.git / commitdiff