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34 package info.magnolia.ui.admincentral;
35
36 import info.magnolia.cms.util.ServletUtil;
37
38 import java.io.BufferedWriter;
39 import java.io.IOException;
40 import java.io.OutputStreamWriter;
41 import java.io.PrintWriter;
42 import java.util.List;
43
44 import javax.inject.Inject;
45 import javax.servlet.ServletException;
46 import javax.servlet.ServletOutputStream;
47 import javax.servlet.http.HttpServletRequest;
48 import javax.servlet.http.HttpServletResponse;
49
50 import org.slf4j.Logger;
51 import org.slf4j.LoggerFactory;
52
53 import com.vaadin.server.BootstrapFragmentResponse;
54 import com.vaadin.server.BootstrapListener;
55 import com.vaadin.server.BootstrapPageResponse;
56 import com.vaadin.server.DeploymentConfiguration;
57 import com.vaadin.server.RequestHandler;
58 import com.vaadin.server.ServiceException;
59 import com.vaadin.server.SessionInitEvent;
60 import com.vaadin.server.SessionInitListener;
61 import com.vaadin.server.UIProvider;
62 import com.vaadin.server.VaadinServlet;
63 import com.vaadin.server.VaadinServletRequest;
64 import com.vaadin.server.VaadinServletResponse;
65 import com.vaadin.server.VaadinServletService;
66 import com.vaadin.server.communication.ServletBootstrapHandler;
67 import com.vaadin.shared.ApplicationConstants;
68
69
70
71
72 public class AdmincentralVaadinServlet extends VaadinServlet {
73
74 private static final Logger log = LoggerFactory.getLogger(AdmincentralVaadinServlet.class);
75
76 private static final String ERROR_PAGE_STYLE = "<style>a {color: inherit; text-decoration:none;}" +
77 "html, body {height:100%; margin:0;}" +
78 ".error-message {color:#fff; font-family: Verdana, sans-serif; padding:24px; line-height:1.3; overflow-x:hidden; overflow-y:auto;}" +
79 "h2 {font-size:5em; font-family:DINWebPro, sans-serif; font-weight: normal; margin:0;}" +
80 ".v-button-link {font-size: 2em;} .v-button-link .v-button-caption {text-decoration:none;}" +
81 "#stacktrace {font-family: monospace; display:none; color:#3e5900;}" +
82 ".viewerror {color:#aabf2f;} .v-button-link:hover, .v-button-link:focus {color:#93bac6;}</style>";
83
84
85
86
87 public static final String RESTART_APPLICATION_PARAM = "?restartApplication";
88
89 private UIProvider admincentralUiProvider;
90
91 @Inject
92 public AdmincentralVaadinServlet(UIProvider admincentralUiProvider) {
93 this.admincentralUiProvider = admincentralUiProvider;
94 }
95
96 @Override
97 protected void servletInitialized() throws ServletException {
98 super.servletInitialized();
99 getService().addSessionInitListener(new SessionInitListener() {
100 @Override
101 public void sessionInit(SessionInitEvent event) {
102 event.getSession().addBootstrapListener(new BootstrapListener() {
103
104 @Override
105 public void modifyBootstrapPage(BootstrapPageResponse response) {
106 response.getDocument().head().append("<meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no\" />");
107 }
108
109 @Override
110 public void modifyBootstrapFragment(BootstrapFragmentResponse response) {
111 }
112 });
113
114
115 if (admincentralUiProvider != null) {
116 event.getSession().addUIProvider(admincentralUiProvider);
117 } else {
118 log.error("Could not inject AdmincentralUIProvider.");
119 }
120 }
121 });
122 }
123
124 @Override
125 protected void service(HttpServletRequest request, HttpServletResponse response) throws IOException {
126 try {
127 String requestURI = ServletUtil.stripPathParameters(request.getRequestURI());
128 if (requestURI != null && requestURI.endsWith("undefined.cache.js")) {
129 writeUnsupportedBrowserPage(request, response);
130 } else {
131 super.service(request, response);
132 }
133 } catch (Exception e) {
134 log.error("An internal error has occurred in the VaadinServlet.", e);
135 writeServerErrorPage(request, response, e);
136 }
137 }
138
139 @Override
140 protected void criticalNotification(VaadinServletRequest request, VaadinServletResponse response, String caption, String message, String details, String url) throws IOException {
141
142 if (isUidlRequest(request)) {
143 super.criticalNotification(request, response, caption, message, details, url);
144 }
145 }
146
147 private void writeServerErrorPage(HttpServletRequest request, HttpServletResponse response, Exception e) throws IOException {
148 if (!isUidlRequest(request)) {
149
150
151
152 String url = request.getRequestURL().toString() + RESTART_APPLICATION_PARAM;
153 String fragment = request.getParameter("v-loc");
154 if (fragment != null && fragment.indexOf("#") != -1) {
155 url += fragment.substring(fragment.indexOf("#"));
156 }
157
158 final StringBuilder output = new StringBuilder();
159 output.append(ERROR_PAGE_STYLE)
160 .append("<div class=\"v-magnolia-shell\" style=\"height:100%;\">")
161 .append("<div id=\"main-launcher\"><a href=\"" + url + "\"><img id=\"logo\" src=\"./../VAADIN/themes/admincentraltheme/img/logo-magnolia.svg\" /></a></div>")
162 .append("<div class=\"error-message v-shell-viewport-slot\">")
163
164 .append("<h2>Whoops!</h2>")
165 .append("<p>The server has encountered an internal error.</p>")
166
167 .append("<div class=\"v-button v-widget link v-button-link\" tabindex=\"0\" role=\"button\">")
168 .append("<a href=\"" + url + "\">[<span class=\"v-button-caption\">Click here to attempt to recover from this</span>]</a></div>")
169
170 .append("<p>We apologize for any inconvenience caused.</p>")
171 .append("<p>If you keep experiencing difficulties, please contact your system administrator.</p>")
172 .append("<p>Please check your log files for the complete stack trace.</p>");
173
174 output.append("</div></div>");
175
176
177 output.insert(0, "<html><head><meta charset=\"UTF-8\"/><meta content=\"width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no\" name=\"viewport\"/><title>Magnolia 5</title><link rel=\"stylesheet\" type=\"text/css\" href=\"./../VAADIN/themes/admincentral/styles.css\"/></head><body>");
178 output.append("</body></html>");
179
180
181 response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
182 writeResponse(response, "text/html; charset=UTF-8", output.toString());
183 }
184 }
185
186 private void writeUnsupportedBrowserPage(HttpServletRequest request, HttpServletResponse response) throws IOException {
187
188 final StringBuilder output = new StringBuilder();
189 output.append(ERROR_PAGE_STYLE)
190 .append("<div class=\"v-magnolia-shell\" style=\"height:100%;\">")
191 .append("<div id=\"main-launcher\"><a href=\"#\"><img id=\"logo\" src=\"./../VAADIN/themes/admincentraltheme/img/logo-magnolia.svg\"></a></div>")
192 .append("<div class=\"error-message v-shell-viewport-slot\">")
193 .append("<h2>Sorry.</h2>")
194 .append("<p>You're trying to use Magnolia 5 on a browser we currently do not support.</p>")
195 .append("<p>Please log in using either Firefox, Chrome, Safari or IE8+.<br />")
196 .append("We apologize for any inconvenience caused.</p>")
197 .append("</div></div>");
198
199
200 output.replace(0, output.length(), output.toString().replaceAll("\\\"", "\\\\\\\""));
201 output.insert(0, "document.body.innerHTML = \"");
202 output.append("\";");
203
204 writeResponse(response, "text/javascript; charset=UTF-8", output.toString());
205 }
206
207
208
209
210 private boolean isUidlRequest(HttpServletRequest request) {
211 String prefix = ApplicationConstants.UIDL_PATH + '/';
212 String pathInfo = request.getPathInfo();
213
214 if (pathInfo == null) {
215 return false;
216 }
217
218 if (!prefix.startsWith("/")) {
219 prefix = '/' + prefix;
220 }
221
222 return pathInfo.startsWith(prefix);
223 }
224
225
226
227
228 private void writeResponse(HttpServletResponse response,
229 String contentType, String output) throws IOException {
230 response.setContentType(contentType);
231 final ServletOutputStream out = response.getOutputStream();
232
233 final PrintWriter outWriter = new PrintWriter(new BufferedWriter(new OutputStreamWriter(out, "UTF-8")));
234 outWriter.print(output);
235 outWriter.flush();
236 outWriter.close();
237 out.flush();
238 }
239
240 @Override
241 protected VaadinServletService createServletService(DeploymentConfiguration deploymentConfiguration) throws ServiceException {
242 VaadinServletService service = new VaadinServletService(this, deploymentConfiguration) {
243
244 @Override
245 protected List<RequestHandler> createRequestHandlers() throws ServiceException {
246 List<RequestHandler> handlers = super.createRequestHandlers();
247 for (int i = 0; i < handlers.size(); i++) {
248 RequestHandler handler = handlers.get(i);
249 if (handler instanceof ServletBootstrapHandler) {
250 handlers.set(i, new ServletBootstrapHandler() {
251
252 @Override
253 protected String getServiceUrl(BootstrapContext context) {
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264
265 return ServletUtil.getOriginalRequestURI(((VaadinServletRequest)context.getRequest()).getHttpServletRequest());
266 }
267 });
268 break;
269 }
270 }
271 return handlers;
272 }
273 };
274 service.init();
275 return service;
276 }
277 }