1 | // Copyright 2012 Georg-August-Universität Göttingen, Germany |
---|
2 | // |
---|
3 | // Licensed under the Apache License, Version 2.0 (the "License"); |
---|
4 | // you may not use this file except in compliance with the License. |
---|
5 | // You may obtain a copy of the License at |
---|
6 | // |
---|
7 | // http://www.apache.org/licenses/LICENSE-2.0 |
---|
8 | // |
---|
9 | // Unless required by applicable law or agreed to in writing, software |
---|
10 | // distributed under the License is distributed on an "AS IS" BASIS, |
---|
11 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
---|
12 | // See the License for the specific language governing permissions and |
---|
13 | // limitations under the License. |
---|
14 | |
---|
15 | package de.ugoe.cs.autoquest.htmlmonitor; |
---|
16 | |
---|
17 | import java.io.BufferedReader; |
---|
18 | import java.io.FileNotFoundException; |
---|
19 | import java.io.IOException; |
---|
20 | import java.io.InputStream; |
---|
21 | import java.io.InputStreamReader; |
---|
22 | import java.io.PrintWriter; |
---|
23 | import java.net.MalformedURLException; |
---|
24 | import java.net.URL; |
---|
25 | import java.util.ArrayList; |
---|
26 | import java.util.List; |
---|
27 | import java.util.Map; |
---|
28 | import java.util.Set; |
---|
29 | |
---|
30 | import javax.servlet.ServletException; |
---|
31 | import javax.servlet.http.HttpServletRequest; |
---|
32 | import javax.servlet.http.HttpServletResponse; |
---|
33 | |
---|
34 | import org.json.simple.JSONArray; |
---|
35 | import org.json.simple.JSONObject; |
---|
36 | import org.json.simple.JSONValue; |
---|
37 | import org.json.simple.parser.ParseException; |
---|
38 | import org.mortbay.jetty.servlet.DefaultServlet; |
---|
39 | |
---|
40 | import de.ugoe.cs.util.FileTools; |
---|
41 | import de.ugoe.cs.util.console.Console; |
---|
42 | |
---|
43 | /** |
---|
44 | * <p> |
---|
45 | * the servlet deployed in the web server that receives all client messages and returns the client |
---|
46 | * java script. The messages are parsed, validated, and forwarded to the provided message listener. |
---|
47 | * If a message is not valid, it is discarded. If an event in a message is not valid, it is |
---|
48 | * discarded. Messages are only received via the POST HTTP method. The GET HTTP method is only |
---|
49 | * implemented for returning the client java script. |
---|
50 | * </p> |
---|
51 | * |
---|
52 | * @author Patrick Harms |
---|
53 | */ |
---|
54 | class HtmlMonitorServlet extends DefaultServlet { |
---|
55 | |
---|
56 | /** */ |
---|
57 | private static final long serialVersionUID = 1L; |
---|
58 | |
---|
59 | /** */ |
---|
60 | private static final boolean DO_TRACE = false; |
---|
61 | |
---|
62 | /** |
---|
63 | * <p> |
---|
64 | * Name and path of the robot filter. |
---|
65 | * </p> |
---|
66 | */ |
---|
67 | private static final String ROBOTFILTERFILE = "data/robots/robotfilter.txt"; |
---|
68 | |
---|
69 | /** |
---|
70 | * <p> |
---|
71 | * Field that contains a regular expression that matches all robots |
---|
72 | * contained in {@link #ROBOTFILTERFILE}. |
---|
73 | * </p> |
---|
74 | */ |
---|
75 | private String robotRegex = null; |
---|
76 | |
---|
77 | /** |
---|
78 | * the message listener to forward received messages to. |
---|
79 | */ |
---|
80 | private transient HtmlGUIElementManager guiElementManager = new HtmlGUIElementManager(); |
---|
81 | |
---|
82 | /** |
---|
83 | * the message listener to forward received messages to. |
---|
84 | */ |
---|
85 | private transient HtmlMonitorMessageListener messageListener; |
---|
86 | |
---|
87 | /** |
---|
88 | * <p> |
---|
89 | * initializes the servlet with the message listener to which all events shall be forwarded |
---|
90 | * </p> |
---|
91 | * |
---|
92 | * @param messageListener the message listener that shall receive all client events |
---|
93 | */ |
---|
94 | HtmlMonitorServlet(HtmlMonitorMessageListener messageListener) { |
---|
95 | this.messageListener = messageListener; |
---|
96 | try { |
---|
97 | loadRobotRegex(); |
---|
98 | } |
---|
99 | catch (Exception e) { |
---|
100 | Console.println |
---|
101 | ("robot filtering disabled: could not parse robot filter file " + ROBOTFILTERFILE); |
---|
102 | } |
---|
103 | } |
---|
104 | |
---|
105 | /** |
---|
106 | * this implements handling of doGet. For this servlet this means that |
---|
107 | * the autoquest-htmlmonitor.js will be delivered to the instance |
---|
108 | * which sent the get request. |
---|
109 | * |
---|
110 | * |
---|
111 | * (non-Javadoc) |
---|
112 | * @see org.mortbay.jetty.servlet.DefaultServlet#doGet(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse) |
---|
113 | */ |
---|
114 | @Override |
---|
115 | protected void doGet(HttpServletRequest request, HttpServletResponse response) |
---|
116 | throws ServletException, IOException |
---|
117 | { |
---|
118 | if ((request.getPathInfo() != null) && |
---|
119 | (request.getPathInfo().endsWith("/script/autoquest-htmlmonitor.js"))) |
---|
120 | { |
---|
121 | BufferedReader reader = null; |
---|
122 | |
---|
123 | try { |
---|
124 | InputStream script = this.getClass().getClassLoader().getResourceAsStream |
---|
125 | ("autoquest-htmlmonitor.js"); |
---|
126 | |
---|
127 | if (script == null) { |
---|
128 | Console.printerrln("could not read autoquest-htmlmonitor.js from classpath"); |
---|
129 | } |
---|
130 | else { |
---|
131 | reader = new BufferedReader(new InputStreamReader(script, "UTF-8")); |
---|
132 | PrintWriter output = response.getWriter(); |
---|
133 | String line; |
---|
134 | |
---|
135 | while ((line = reader.readLine()) != null) { |
---|
136 | output.println(line); |
---|
137 | } |
---|
138 | |
---|
139 | output.close(); |
---|
140 | } |
---|
141 | } |
---|
142 | catch (Exception e) { |
---|
143 | Console.printerrln("could not read autoquest-htmlmonitor.js from classpath: " + e); |
---|
144 | Console.logException(e); |
---|
145 | } |
---|
146 | finally { |
---|
147 | if (reader != null) { |
---|
148 | reader.close(); |
---|
149 | } |
---|
150 | } |
---|
151 | } |
---|
152 | } |
---|
153 | |
---|
154 | /** |
---|
155 | * this implements handling of doPost. For this servlet this means that |
---|
156 | * the data from the post request will be parsed and validated. |
---|
157 | * |
---|
158 | * (non-Javadoc) |
---|
159 | * @see org.mortbay.jetty.servlet.DefaultServlet#doPost(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse) |
---|
160 | */ |
---|
161 | @Override |
---|
162 | protected void doPost(HttpServletRequest request, HttpServletResponse response) |
---|
163 | throws ServletException, IOException |
---|
164 | { |
---|
165 | Object value = null; |
---|
166 | try { |
---|
167 | //InputStream requestInputStream = dumpStreamContent(request.getInputStream()); |
---|
168 | InputStream requestInputStream = request.getInputStream(); |
---|
169 | |
---|
170 | value = JSONValue.parseWithException |
---|
171 | (new InputStreamReader(requestInputStream, "UTF-8")); |
---|
172 | |
---|
173 | if (!(value instanceof JSONObject)) { |
---|
174 | Console.printerrln("incoming data is not of the expected type --> discarding it"); |
---|
175 | } |
---|
176 | else { |
---|
177 | handleJSONObject((JSONObject) value); |
---|
178 | } |
---|
179 | } |
---|
180 | catch (ParseException e) { |
---|
181 | Console.printerrln |
---|
182 | ("could not parse incoming data --> discarding it (" + e.toString() + ")"); |
---|
183 | } |
---|
184 | } |
---|
185 | |
---|
186 | /** |
---|
187 | * <p> |
---|
188 | * processes a received JSON object and validates it. If the message is ok, it is forwarded |
---|
189 | * to the message listener |
---|
190 | * </p> |
---|
191 | * |
---|
192 | * @param object the JSON object that contains a client message |
---|
193 | */ |
---|
194 | private void handleJSONObject(JSONObject object) { |
---|
195 | if (DO_TRACE) { |
---|
196 | dumpJSONObject(object, ""); |
---|
197 | } |
---|
198 | |
---|
199 | JSONObject message = assertValue(object, "message", JSONObject.class); |
---|
200 | |
---|
201 | if (message == null) { |
---|
202 | Console.printerrln("incoming data is no valid message --> discarding it"); |
---|
203 | } |
---|
204 | else { |
---|
205 | HtmlClientInfos clientInfos = extractClientInfos(message); |
---|
206 | |
---|
207 | if (clientInfos == null) { |
---|
208 | Console.printerrln |
---|
209 | ("incoming message does not contain valid client infos --> discarding it"); |
---|
210 | } |
---|
211 | else if (isRobot(clientInfos.getUserAgent())) { |
---|
212 | Console.printerrln |
---|
213 | ("ignoring robot " + clientInfos.getUserAgent()); |
---|
214 | } |
---|
215 | else { |
---|
216 | HtmlGUIElement guiStructure = extractHtmlPageElements(message, clientInfos); |
---|
217 | HtmlEvent[] events = extractHtmlEvents(message, clientInfos); |
---|
218 | |
---|
219 | if (events == null) { |
---|
220 | Console.printerrln |
---|
221 | ("incoming message does not contain valid events --> discarding it"); |
---|
222 | } |
---|
223 | else { |
---|
224 | messageListener.handleMessage(clientInfos, guiStructure, events); |
---|
225 | } |
---|
226 | } |
---|
227 | } |
---|
228 | } |
---|
229 | |
---|
230 | /** |
---|
231 | * <p> |
---|
232 | * tries to extract the client infos out of the received JSON object. If this is not fully |
---|
233 | * possible, an appropriate message is dumped and the whole message is discarded (the method |
---|
234 | * return null). |
---|
235 | * </p> |
---|
236 | * |
---|
237 | * @param message the message to parse the client infos from |
---|
238 | * |
---|
239 | * @return the client infos, if the message is valid in this respect, or null if not |
---|
240 | */ |
---|
241 | private HtmlClientInfos extractClientInfos(JSONObject message) { |
---|
242 | HtmlClientInfos clientInfos = null; |
---|
243 | |
---|
244 | JSONObject infos = assertValue(message, "clientInfos", JSONObject.class); |
---|
245 | |
---|
246 | if (infos != null) { |
---|
247 | String clientId = assertValue((JSONObject) infos, "clientId", String.class); |
---|
248 | String userAgent = assertValue((JSONObject) infos, "userAgent", String.class); |
---|
249 | URL url = assertValue((JSONObject) infos, "url", URL.class); |
---|
250 | String title = assertValue((JSONObject) infos, "title", String.class); |
---|
251 | |
---|
252 | if (clientId == null) { |
---|
253 | Console.printerrln("client infos do not contain a valid client id"); |
---|
254 | } |
---|
255 | else if (userAgent == null) { |
---|
256 | Console.printerrln("client infos do not contain a valid user agent"); |
---|
257 | } |
---|
258 | else if (url == null) { |
---|
259 | Console.printerrln("client infos do not contain a valid URL"); |
---|
260 | } |
---|
261 | else if (title == null) { |
---|
262 | Console.printerrln("client infos do not contain a valid title"); |
---|
263 | } |
---|
264 | else { |
---|
265 | clientInfos = new HtmlClientInfos(clientId, userAgent, url, title); |
---|
266 | } |
---|
267 | } |
---|
268 | |
---|
269 | return clientInfos; |
---|
270 | } |
---|
271 | |
---|
272 | /** |
---|
273 | * <p> |
---|
274 | * tries to extract the events out of the received JSON object. If this is not fully |
---|
275 | * possible, an appropriate message is dumped and the errorprone event is discarded. If no |
---|
276 | * valid event is found, the whole message is discarded. |
---|
277 | * </p> |
---|
278 | * |
---|
279 | * @param object the message to parse the events from |
---|
280 | * @param clientInfos the infos about the client that send the events |
---|
281 | * |
---|
282 | * @return the valid events stored in the message, or null if there are none |
---|
283 | */ |
---|
284 | private HtmlEvent[] extractHtmlEvents(JSONObject object, HtmlClientInfos clientInfos) { |
---|
285 | List<HtmlEvent> events = null; |
---|
286 | |
---|
287 | JSONArray eventArray = assertValue(object, "events", JSONArray.class); |
---|
288 | |
---|
289 | if (eventArray != null) { |
---|
290 | events = new ArrayList<HtmlEvent>(); |
---|
291 | |
---|
292 | HtmlServer server = getServerElement(clientInfos); |
---|
293 | HtmlDocument document = getPageElementRepresentingWebPage(clientInfos, server); |
---|
294 | |
---|
295 | for (int i = 0; i < eventArray.size(); i++) { |
---|
296 | Object eventObj = eventArray.get(i); |
---|
297 | if (!(eventObj instanceof JSONObject)) { |
---|
298 | Console.printerrln("event number " + (i + 1) + " is not a valid event object"); |
---|
299 | } |
---|
300 | else { |
---|
301 | Long time = assertValue(((JSONObject) eventObj), "time", Long.class); |
---|
302 | String domPath = assertValue(((JSONObject) eventObj), "path", String.class); |
---|
303 | String eventType = |
---|
304 | assertValue(((JSONObject) eventObj), "eventType", String.class); |
---|
305 | Integer[] coordinates = |
---|
306 | assertValue(((JSONObject) eventObj), "coordinates", Integer[].class); |
---|
307 | Integer key = assertValue(((JSONObject) eventObj), "key", Integer.class); |
---|
308 | Integer[] scrollPosition = |
---|
309 | assertValue(((JSONObject) eventObj), "scrollPosition", Integer[].class); |
---|
310 | String selectedValue = |
---|
311 | assertValue(((JSONObject) eventObj), "selectedValue", String.class); |
---|
312 | |
---|
313 | if (eventType == null) { |
---|
314 | Console.printerrln("event number " + (i + 1) + " has no valid event type"); |
---|
315 | } |
---|
316 | else if (time == null) { |
---|
317 | Console.printerrln(eventType + " event has no valid timestamp"); |
---|
318 | } |
---|
319 | else if (domPath == null) { |
---|
320 | Console.printerrln(eventType + " event has no valid DOM path"); |
---|
321 | } |
---|
322 | else if ((coordinates != null) && (coordinates.length != 2)) { |
---|
323 | Console.printerrln(eventType + " event has no valid coordinates"); |
---|
324 | } |
---|
325 | else if (checkEventParameterCombinations |
---|
326 | (eventType, coordinates, key, scrollPosition, selectedValue, domPath)) |
---|
327 | { |
---|
328 | HtmlPageElement target = |
---|
329 | guiElementManager.getPageElement(document, domPath); |
---|
330 | |
---|
331 | if (target != null) { |
---|
332 | events.add(new HtmlEvent(clientInfos, time, target, eventType, |
---|
333 | coordinates, key, scrollPosition, |
---|
334 | selectedValue)); |
---|
335 | } |
---|
336 | else { |
---|
337 | events.add(new HtmlEvent(clientInfos, time, document, domPath, |
---|
338 | eventType, coordinates, key, scrollPosition, |
---|
339 | selectedValue)); |
---|
340 | } |
---|
341 | } |
---|
342 | else { |
---|
343 | Console.printerrln(eventType + " event has no valid parameter combination"); |
---|
344 | } |
---|
345 | } |
---|
346 | } |
---|
347 | |
---|
348 | } |
---|
349 | |
---|
350 | if ((events != null) && (events.size() > 0)) { |
---|
351 | return events.toArray(new HtmlEvent[events.size()]); |
---|
352 | } |
---|
353 | else { |
---|
354 | return null; |
---|
355 | } |
---|
356 | } |
---|
357 | |
---|
358 | /** |
---|
359 | * <p> |
---|
360 | * extracts the GUI structure from the provided JSON object. |
---|
361 | * </p> |
---|
362 | * |
---|
363 | * @param object the JSON object to extract the GUI structure from |
---|
364 | * @param clientInfos infos about the client who send the data |
---|
365 | * |
---|
366 | * @return the GUI structure extracted from the JSON object of which the root node is a |
---|
367 | * representation of the server of the HTML page that was observed |
---|
368 | */ |
---|
369 | private HtmlServer extractHtmlPageElements(JSONObject object, |
---|
370 | HtmlClientInfos clientInfos) |
---|
371 | { |
---|
372 | HtmlServer server = getServerElement(clientInfos); |
---|
373 | HtmlDocument document = getPageElementRepresentingWebPage(clientInfos, server); |
---|
374 | |
---|
375 | JSONObject jsonPageElement = assertValue(object, "guiModel", JSONObject.class); |
---|
376 | document.addChild(convert(jsonPageElement, document, null)); |
---|
377 | |
---|
378 | return server; |
---|
379 | } |
---|
380 | |
---|
381 | /** |
---|
382 | * <p> |
---|
383 | * instantiates an element of the GUI structure representing the server of the observed |
---|
384 | * web page |
---|
385 | * </p> |
---|
386 | * |
---|
387 | * @param clientInfos infos about the client who send the data |
---|
388 | * |
---|
389 | * @return as described |
---|
390 | */ |
---|
391 | private HtmlServer getServerElement(HtmlClientInfos clientInfos) { |
---|
392 | String host = clientInfos.getUrl().getHost(); |
---|
393 | int port = 80; |
---|
394 | |
---|
395 | if (clientInfos.getUrl().getPort() > -1) { |
---|
396 | port = clientInfos.getUrl().getPort(); |
---|
397 | } |
---|
398 | |
---|
399 | return guiElementManager.createHtmlServer(host, port); |
---|
400 | } |
---|
401 | |
---|
402 | /** |
---|
403 | * <p> |
---|
404 | * instantiates an element of the GUI structure representing the observed web page. Adds |
---|
405 | * this element to the provided server as child. |
---|
406 | * </p> |
---|
407 | * |
---|
408 | * @param clientInfos infos about the client who send the data |
---|
409 | * @param server the server on which the page represented by the return value resists |
---|
410 | * |
---|
411 | * @return as described |
---|
412 | */ |
---|
413 | private HtmlDocument getPageElementRepresentingWebPage(HtmlClientInfos clientInfos, |
---|
414 | HtmlServer server) |
---|
415 | { |
---|
416 | String path = clientInfos.getUrl().getPath(); |
---|
417 | String query = null; |
---|
418 | |
---|
419 | if (clientInfos.getUrl().getQuery() != null) { |
---|
420 | query = "?" + clientInfos.getUrl().getQuery(); |
---|
421 | } |
---|
422 | |
---|
423 | HtmlDocument document = guiElementManager.createHtmlDocument |
---|
424 | (server, path, query, clientInfos.getTitle()); |
---|
425 | |
---|
426 | server.addChild(document); |
---|
427 | |
---|
428 | return document; |
---|
429 | } |
---|
430 | |
---|
431 | /** |
---|
432 | * <p> |
---|
433 | * converts a JSON object representing an HTML page element to an HTML page element. Calls |
---|
434 | * itself recursively to also convert the children of the element, if any. |
---|
435 | * </p> |
---|
436 | * |
---|
437 | * @param jsonPageElement the JSON object to be converted |
---|
438 | * @param document the document to which the page element belongs |
---|
439 | * @param parent the parent page element of the converted element, of null, if none |
---|
440 | * is present. In this case the document is considered the parent |
---|
441 | * element. |
---|
442 | * |
---|
443 | * @return as described. |
---|
444 | */ |
---|
445 | private HtmlPageElement convert(JSONObject jsonPageElement, |
---|
446 | HtmlDocument document, |
---|
447 | HtmlPageElement parent) |
---|
448 | { |
---|
449 | HtmlPageElement result = null; |
---|
450 | |
---|
451 | if (jsonPageElement != null) { |
---|
452 | String tagName = assertValue(jsonPageElement, "tagName", String.class); |
---|
453 | String htmlid = assertValue(jsonPageElement, "htmlId", String.class); |
---|
454 | Integer index = assertValue(jsonPageElement, "index", Integer.class); |
---|
455 | |
---|
456 | result = guiElementManager.createHtmlPageElement |
---|
457 | (document, parent, tagName, htmlid, index); |
---|
458 | |
---|
459 | JSONArray childElements = assertValue(jsonPageElement, "children", JSONArray.class); |
---|
460 | |
---|
461 | if (childElements != null) { |
---|
462 | Object jsonChild; |
---|
463 | |
---|
464 | for (int i = 0; i < childElements.size(); i++) { |
---|
465 | jsonChild = childElements.get(i); |
---|
466 | if (!(jsonChild instanceof JSONObject)) { |
---|
467 | Console.printerrln("child " + (i + 1) + " of HTML page element " + tagName + |
---|
468 | " is no valid HTML page element"); |
---|
469 | } |
---|
470 | else { |
---|
471 | result.addChild(convert((JSONObject) jsonChild, document, result)); |
---|
472 | } |
---|
473 | } |
---|
474 | } |
---|
475 | |
---|
476 | } |
---|
477 | |
---|
478 | return result; |
---|
479 | } |
---|
480 | |
---|
481 | /** |
---|
482 | * <p> |
---|
483 | * validates if for the given event type the parameter combination of coordinates, key, |
---|
484 | * scroll position, and selected value is valid. As an example, an onclick event should |
---|
485 | * usually not have an associated scroll position. |
---|
486 | * </p> |
---|
487 | * |
---|
488 | * @param eventType the type of the event |
---|
489 | * @param coordinates the coordinates of the event |
---|
490 | * @param key the key of the event |
---|
491 | * @param scrollPosition the scroll position of the event |
---|
492 | * @param selectedValue the value selected through a specific event |
---|
493 | * @param domPath the path through the DOM of the document of the HTML element on which |
---|
494 | * the event was executed |
---|
495 | * |
---|
496 | * @return true, if the combination of the parameters is valid, false else |
---|
497 | */ |
---|
498 | private boolean checkEventParameterCombinations(String eventType, |
---|
499 | Integer[] coordinates, |
---|
500 | Integer key, |
---|
501 | Integer[] scrollPosition, |
---|
502 | String selectedValue, |
---|
503 | String domPath) |
---|
504 | { |
---|
505 | boolean result = false; |
---|
506 | |
---|
507 | if ("onscroll".equals(eventType)) { |
---|
508 | if ((coordinates == null) && (key == null) && |
---|
509 | (scrollPosition != null) && (selectedValue == null)) |
---|
510 | { |
---|
511 | result = true; |
---|
512 | } |
---|
513 | else { |
---|
514 | Console.printerrln(eventType + " event has invalid parameters"); |
---|
515 | } |
---|
516 | } |
---|
517 | else if ("onclick".equals(eventType) || "ondblclick".equals(eventType)) { |
---|
518 | if ((coordinates != null) && (key == null) && |
---|
519 | (scrollPosition == null) && (selectedValue == null)) |
---|
520 | { |
---|
521 | result = true; |
---|
522 | } |
---|
523 | else { |
---|
524 | Console.printerrln(eventType + " event has invalid parameters"); |
---|
525 | } |
---|
526 | } |
---|
527 | else if ("onchange".equals(eventType)) { |
---|
528 | // "input_password" dont have a selectedValue |
---|
529 | if (domPath.contains("input_password")) { |
---|
530 | if ((coordinates == null) && (key == null) && (scrollPosition == null)) { |
---|
531 | result = true; |
---|
532 | } |
---|
533 | else { |
---|
534 | Console.printerrln(eventType + " event has invalid parameters"); |
---|
535 | } |
---|
536 | } |
---|
537 | else { |
---|
538 | if ((coordinates == null) && (key == null) && (scrollPosition == null) && |
---|
539 | (selectedValue != null)) |
---|
540 | { |
---|
541 | result = true; |
---|
542 | } |
---|
543 | else { |
---|
544 | Console.printerrln(eventType + " event has invalid parameters"); |
---|
545 | } |
---|
546 | } |
---|
547 | |
---|
548 | } |
---|
549 | else if ("onkeypress".equals(eventType) || "onkeydown".equals(eventType) || |
---|
550 | "onkeyup".equals(eventType)) |
---|
551 | { |
---|
552 | if ((coordinates == null) && (key != null) && |
---|
553 | (scrollPosition == null) && (selectedValue == null)) |
---|
554 | { |
---|
555 | result = true; |
---|
556 | } |
---|
557 | else { |
---|
558 | Console.printerrln(eventType + " event has invalid parameters"); |
---|
559 | } |
---|
560 | } |
---|
561 | else if ("onfocus".equals(eventType) || "onmouseout".equals(eventType) || |
---|
562 | "onmousemove".equals(eventType) || "onload".equals(eventType) || |
---|
563 | "onunload".equals(eventType) || "onbeforeunload".equals(eventType) || |
---|
564 | "onpagehide".equals(eventType) || "onpageshow".equals(eventType) || |
---|
565 | "onabort".equals(eventType) || "onsubmit".equals(eventType) || |
---|
566 | "onplaying".equals(eventType) || "onpause".equals(eventType) || |
---|
567 | "ontimeupdate".equals(eventType) || "onerror".equals(eventType) || |
---|
568 | "onundo".equals(eventType) || "onreset".equals(eventType) || |
---|
569 | "onselect".equals(eventType)) |
---|
570 | { |
---|
571 | if ((coordinates == null) && (key == null) && |
---|
572 | (scrollPosition == null) && (selectedValue == null)) |
---|
573 | { |
---|
574 | result = true; |
---|
575 | } |
---|
576 | else { |
---|
577 | Console.printerrln(eventType + " event has invalid parameters"); |
---|
578 | } |
---|
579 | } |
---|
580 | else { |
---|
581 | Console.printerrln("'" + eventType + "' is not a valid event type"); |
---|
582 | } |
---|
583 | |
---|
584 | return result; |
---|
585 | } |
---|
586 | |
---|
587 | /** |
---|
588 | * <p> |
---|
589 | * converts a value in the provided object matching the provided key to the provided type. If |
---|
590 | * there is no value with the key or if the value can not be transformed to the provided type, |
---|
591 | * the method returns null. |
---|
592 | * </p> |
---|
593 | * |
---|
594 | * @param object the object to read the value from |
---|
595 | * @param key the key of the value |
---|
596 | * @param clazz the type to which the value should be transformed |
---|
597 | * |
---|
598 | * @return the value or null if either the value does not exist or if it can not be transformed |
---|
599 | * to the expected type |
---|
600 | */ |
---|
601 | @SuppressWarnings("unchecked") |
---|
602 | private <T> T assertValue(JSONObject object, String key, Class<T> clazz) { |
---|
603 | Object value = object.get(key); |
---|
604 | T result = null; |
---|
605 | |
---|
606 | if (clazz.isInstance(value)) { |
---|
607 | result = (T) value; |
---|
608 | } |
---|
609 | else if (value instanceof String) { |
---|
610 | if (URL.class.equals(clazz)) { |
---|
611 | try { |
---|
612 | result = (T) new URL((String) value); |
---|
613 | } |
---|
614 | catch (MalformedURLException e) { |
---|
615 | e.printStackTrace(); |
---|
616 | Console.printerrln("retrieved malformed URL for key '" + key + "': " + value + |
---|
617 | " (" + e.toString() + ")"); |
---|
618 | } |
---|
619 | } |
---|
620 | else if ((int.class.equals(clazz)) || (Integer.class.equals(clazz))) { |
---|
621 | try { |
---|
622 | result = (T) Integer.valueOf(Integer.parseInt((String) value)); |
---|
623 | } |
---|
624 | catch (NumberFormatException e) { |
---|
625 | Console.printerrln |
---|
626 | ("retrieved malformed integer for key '" + key + "': " + value); |
---|
627 | } |
---|
628 | } |
---|
629 | else if ((long.class.equals(clazz)) || (Long.class.equals(clazz))) { |
---|
630 | try { |
---|
631 | result = (T) Long.valueOf(Long.parseLong((String) value)); |
---|
632 | } |
---|
633 | catch (NumberFormatException e) { |
---|
634 | Console.printerrln |
---|
635 | ("retrieved malformed long for key '" + key + "': " + value); |
---|
636 | } |
---|
637 | } |
---|
638 | } |
---|
639 | else if (value instanceof Long) { |
---|
640 | if ((int.class.equals(clazz)) || (Integer.class.equals(clazz))) { |
---|
641 | result = (T) (Integer) ((Long) value).intValue(); |
---|
642 | } |
---|
643 | } |
---|
644 | else if (value instanceof JSONArray) { |
---|
645 | if ((int[].class.equals(clazz)) || (Integer[].class.equals(clazz))) { |
---|
646 | Integer[] resultArray = new Integer[((JSONArray) value).size()]; |
---|
647 | boolean allCouldBeParsed = true; |
---|
648 | |
---|
649 | for (int i = 0; i < ((JSONArray) value).size(); i++) { |
---|
650 | try { |
---|
651 | if (((JSONArray) value).get(i) instanceof Long) { |
---|
652 | resultArray[i] = (int) (long) (Long) ((JSONArray) value).get(i); |
---|
653 | } |
---|
654 | else if (((JSONArray) value).get(i) instanceof String) { |
---|
655 | try { |
---|
656 | resultArray[i] = |
---|
657 | (int) Long.parseLong((String) ((JSONArray) value).get(i)); |
---|
658 | } |
---|
659 | catch (NumberFormatException e) { |
---|
660 | Console.printerrln |
---|
661 | ("retrieved malformed integer array for key '" + key + "': " + |
---|
662 | value); |
---|
663 | |
---|
664 | allCouldBeParsed = false; |
---|
665 | break; |
---|
666 | } |
---|
667 | } |
---|
668 | else { |
---|
669 | Console.printerrln |
---|
670 | ("can not handle type of value in expected integer array '" + key + |
---|
671 | "': " + value); |
---|
672 | } |
---|
673 | } |
---|
674 | catch (ClassCastException e) { |
---|
675 | e.printStackTrace(); |
---|
676 | Console.printerrln("expected integer array for key '" + key + |
---|
677 | "' but it was something else: " + value); |
---|
678 | |
---|
679 | allCouldBeParsed = false; |
---|
680 | break; |
---|
681 | } |
---|
682 | } |
---|
683 | |
---|
684 | if (allCouldBeParsed) { |
---|
685 | result = (T) resultArray; |
---|
686 | } |
---|
687 | } |
---|
688 | } |
---|
689 | |
---|
690 | return result; |
---|
691 | } |
---|
692 | |
---|
693 | /** |
---|
694 | * <p> |
---|
695 | * Checks whether an agent is a robot. |
---|
696 | * </p> |
---|
697 | * |
---|
698 | * @param agent |
---|
699 | * agent that is checked |
---|
700 | * @return true, if the agent is a robot; false otherwise |
---|
701 | */ |
---|
702 | private boolean isRobot(String agent) { |
---|
703 | return agent.matches(robotRegex); |
---|
704 | } |
---|
705 | |
---|
706 | /** |
---|
707 | * <p> |
---|
708 | * Reads {@link #ROBOTFILTERFILE} and creates a regular expression that |
---|
709 | * matches all the robots defined in the file. The regular expression is |
---|
710 | * stored in the field {@link #robotRegex}. |
---|
711 | * </p> |
---|
712 | * |
---|
713 | * @throws IOException |
---|
714 | * thrown if there is a problem reading the robot filter |
---|
715 | * @throws FileNotFoundException |
---|
716 | * thrown if the robot filter is not found |
---|
717 | */ |
---|
718 | private void loadRobotRegex() throws IOException, FileNotFoundException { |
---|
719 | String[] lines = FileTools.getLinesFromFile(ROBOTFILTERFILE); |
---|
720 | StringBuilder regex = new StringBuilder(); |
---|
721 | for (int i = 0; i < lines.length; i++) { |
---|
722 | regex.append("(.*" + lines[i] + ".*)"); |
---|
723 | if (i != lines.length - 1) { |
---|
724 | regex.append('|'); |
---|
725 | } |
---|
726 | } |
---|
727 | robotRegex = regex.toString(); |
---|
728 | } |
---|
729 | |
---|
730 | /** |
---|
731 | * <p> |
---|
732 | * convenience method for dumping the content of a stream and returning a new stream |
---|
733 | * containing the same data. |
---|
734 | * </p> |
---|
735 | * |
---|
736 | * @param inputStream the stream to be dumped and copied |
---|
737 | * @return the copy of the stream |
---|
738 | * |
---|
739 | * @throws IOException if the stream can not be read |
---|
740 | */ |
---|
741 | /* private InputStream dumpStreamContent(ServletInputStream inputStream) throws IOException { |
---|
742 | List<Byte> bytes = new ArrayList<Byte>(); |
---|
743 | int buf; |
---|
744 | |
---|
745 | while ((buf = inputStream.read()) >= 0) { |
---|
746 | bytes.add((byte) buf); |
---|
747 | } |
---|
748 | |
---|
749 | byte[] byteArray = new byte[bytes.size()]; |
---|
750 | for (int i = 0; i < bytes.size(); i++) { |
---|
751 | byteArray[i] = bytes.get(i); |
---|
752 | } |
---|
753 | |
---|
754 | System.out.println(new String(byteArray, "UTF-8")); |
---|
755 | |
---|
756 | return new ByteArrayInputStream(byteArray); |
---|
757 | }*/ |
---|
758 | |
---|
759 | /** |
---|
760 | * <p> |
---|
761 | * convenience method for dumping an object to std out. If the object is a JSON object, it is |
---|
762 | * deeply analyzed and its internal structure is dumped as well. |
---|
763 | * </p> |
---|
764 | * |
---|
765 | * @param object the object to dump |
---|
766 | * @param indent the indentation to be used. |
---|
767 | */ |
---|
768 | private void dumpJSONObject(Object object, String indent) { |
---|
769 | if (object instanceof JSONArray) { |
---|
770 | boolean arrayContainsJSONObjects = false; |
---|
771 | for (Object arrayElem : (JSONArray) object) { |
---|
772 | if (arrayElem instanceof JSONObject) { |
---|
773 | arrayContainsJSONObjects = true; |
---|
774 | break; |
---|
775 | } |
---|
776 | } |
---|
777 | |
---|
778 | if (arrayContainsJSONObjects) { |
---|
779 | System.out.println(); |
---|
780 | System.out.print(indent); |
---|
781 | System.out.println('['); |
---|
782 | System.out.print(indent); |
---|
783 | System.out.print(' '); |
---|
784 | } |
---|
785 | else { |
---|
786 | System.out.print(' '); |
---|
787 | System.out.print('['); |
---|
788 | } |
---|
789 | |
---|
790 | int index = 0; |
---|
791 | for (Object arrayElem : (JSONArray) object) { |
---|
792 | if (index++ > 0) { |
---|
793 | System.out.print(","); |
---|
794 | if (arrayContainsJSONObjects) { |
---|
795 | System.out.println(); |
---|
796 | System.out.print(indent); |
---|
797 | } |
---|
798 | |
---|
799 | System.out.print(' '); |
---|
800 | } |
---|
801 | |
---|
802 | dumpJSONObject(arrayElem, indent + " "); |
---|
803 | } |
---|
804 | |
---|
805 | if (arrayContainsJSONObjects) { |
---|
806 | System.out.println(); |
---|
807 | System.out.print(indent); |
---|
808 | } |
---|
809 | |
---|
810 | System.out.print(']'); |
---|
811 | } |
---|
812 | else if (object instanceof JSONObject) { |
---|
813 | System.out.println(" {"); |
---|
814 | |
---|
815 | @SuppressWarnings("unchecked") |
---|
816 | Set<Map.Entry<?,?>> entrySet = ((JSONObject) object).entrySet(); |
---|
817 | |
---|
818 | int index = 0; |
---|
819 | for (Map.Entry<?,?> entry : entrySet) { |
---|
820 | if (index++ > 0) { |
---|
821 | System.out.println(","); |
---|
822 | } |
---|
823 | System.out.print(indent); |
---|
824 | System.out.print(" \""); |
---|
825 | System.out.print(entry.getKey()); |
---|
826 | System.out.print("\":"); |
---|
827 | dumpJSONObject(entry.getValue(), indent + " "); |
---|
828 | } |
---|
829 | |
---|
830 | System.out.println(); |
---|
831 | System.out.print(indent); |
---|
832 | System.out.print('}'); |
---|
833 | } |
---|
834 | else { |
---|
835 | System.out.print('"'); |
---|
836 | System.out.print(object); |
---|
837 | System.out.print('"'); |
---|
838 | } |
---|
839 | } |
---|
840 | |
---|
841 | } |
---|