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GeezerVison is showing github.com — javaxt-express/src/javaxt/express/FileManager.java at master · javaxt-project/javaxt-express Expand file tree/ Copy pathFileManager.javaMore file actions 782 lines (620 loc) · 29 KB / Copy pathFileManager.javaFile metadata and controls782 lines (620 loc) · 29 KB 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 package javaxt.express; import java.util.*; import java.io.IOException; import java.util.concurrent.ConcurrentHashMap; import javaxt.io.Directory; import static javaxt.xml.DOM.*; import javaxt.utils.ThreadPool; import javaxt.express.utils.DateUtils; import static javaxt.utils.Console.console; import javaxt.http.servlet.HttpServletRequest; import javaxt.http.servlet.HttpServletResponse; import org.w3c.dom.Node; import org.w3c.dom.NodeList; //****************************************************************************** //** FileManager //****************************************************************************** /** * Used to serve up static files (html, javascript, css, images, etc). * Ensures static files are cached properly by browsers by appending * version numbers to css and js files. Also updates js and css resources * referenced inside html files and application-specific xml files. Redirects * requests to the most recent version of each file. Sends 304 responses as * required. * ******************************************************************************/ public class FileManager { private javaxt.io.Directory web; private String[] welcomeFiles = new String[]{"index.html", "index.htm", "default.htm"}; //************************************************************************** //** Constructor //************************************************************************** /** Used to create an instance of this class. * @param web Directory from which to serve files (aka web root folder) */ public FileManager(javaxt.io.Directory web){ this.web = web; } //************************************************************************** //** getDirectory //************************************************************************** /** Returns the root directory. */ public javaxt.io.Directory getDirectory(){ return web; } //************************************************************************** //** getFileUpdates //************************************************************************** /** Used to monitor the web directory for changes. Calls an EventMonitor * whenever a file is created, updated, moved, or deleted. Example: <pre> fileManager.getFileUpdates((Directory.Event event) -> { String op; int eventID = event.getEventID(); if (eventID==Directory.Event.CREATE){ op = "create"; } else if (eventID==Directory.Event.DELETE){ op = "delete"; } else{ op = "update"; } java.io.File file = new java.io.File(event.getFile()); console.log(op, file); }); </pre> */ public void getFileUpdates(EventMonitor eventMonitor){ if (eventMonitor==null) return; new Thread(() -> { try{ List events = web.getEvents(); while (true){ Directory.Event event; synchronized (events) { while (events.isEmpty()) { try { events.wait(); } catch (InterruptedException e) {} } event = (Directory.Event) events.remove(0); } try{ if (isValidPath(event.getFile())){ if (event.getEventID()==Directory.Event.DELETE){ eventMonitor.processEvent(event); } else{ java.io.File f = new java.io.File(event.getFile()); if (f.isFile() && !f.isHidden()){ eventMonitor.processEvent(event); } } } } catch(Exception e){} } } catch(Exception e){} }).start(); } //************************************************************************** //** EventMonitor Interface //************************************************************************** /** Implementations of this class are used by the getFileUpdates() method * to process events (e.g. file created, updated, moved or deleted). */ public static interface EventMonitor { public void processEvent(Directory.Event event); } //************************************************************************** //** getFile //************************************************************************** /** Returns a file that best matches the given HttpServletRequest. See the * other getFile() method for more information. */ public java.io.File getFile(HttpServletRequest request){ String path = request.getPathInfo(); return getFile(path); } //************************************************************************** //** getFile //************************************************************************** /** Returns a file that best matches the given path. If the path represents * a directory, searches for welcome files in the directory (e.g. * "index.html"). Returns null if a file is not found. * @param path Relative path to a file or folder, relative to the web root. */ public java.io.File getFile(String path){ if (path==null) path = ""; while (path.startsWith("/")) path = path.substring(1); //Construct a list of possible file paths ArrayList<String> files = new ArrayList<>(); files.add(web + path); if (path.length()>0 && !path.endsWith("/")) path+="/"; for (String welcomeFile : welcomeFiles){ files.add(web + path + welcomeFile); } //Loop through all the possible file combinations for (String str : files){ //Ensure that the path doesn't have any illegal directives if (!isValidPath(str)) continue; //Send file if it exists java.io.File file = new java.io.File(str); if (file.exists() && file.isFile() && !file.isHidden()){ return file; } } return null; } //************************************************************************** //** sendFile //************************************************************************** /** Used to send a file to the client. Determines which file to send via * the URL path in the HTTP request. */ public void sendFile(HttpServletRequest request, HttpServletResponse response) throws IOException{ java.io.File file = getFile(request); sendFile(file, request, response); } //************************************************************************** //** sendFile //************************************************************************** /** Used to send a file to the client. Determines which file to send via * the given path. * @param path Relative path to a file or folder, relative to the web root. */ public void sendFile(String path, HttpServletRequest request, HttpServletResponse response) throws IOException { java.io.File file = getFile(path); sendFile(file, request, response); } //************************************************************************** //** sendFile //************************************************************************** /** Used to send a file to the client. */ public void sendFile(javaxt.io.File file, HttpServletRequest request, HttpServletResponse response) throws IOException { sendFile(file==null ? null : file.toFile(), request, response); } //************************************************************************** //** sendFile //************************************************************************** /** Used to send a file to the client. */ public void sendFile(java.io.File file, HttpServletRequest request, HttpServletResponse response) throws IOException { //Validate the given file. Send 404 response as needed. if (file==null || !file.isFile() || !file.exists() || file.isHidden()){ response.setStatus(404); return; } String name = file.getName(); int idx = name.lastIndexOf("."); if (idx > -1){ String ext = name.substring(idx+1).toLowerCase(); if (ext.equals("js") || ext.equals("css")){ //Add version number to javascript and css files to ensure //proper caching. Otherwise, browsers like Chrome may not //return the correct file to the client. javaxt.utils.URL url = new javaxt.utils.URL(request.getURL()); long currVersion = new javaxt.utils.Date(file.lastModified()).toLong(); long requestedVersion = 0; try{ requestedVersion = Long.parseLong(url.getParameter("v")); } catch(Exception e){} if (requestedVersion < currVersion){ url.setParameter("v", currVersion+""); response.sendRedirect(url.toString(), true); return; } else if (requestedVersion==currVersion){ response.setHeader("Cache-Control", "public, max-age=31536000, immutable"); } } else if (ext.equals("htm") || ext.equals("html")){ //Extract html from file javaxt.io.File htmlFile = new javaxt.io.File(file); String html = htmlFile.getText(); //Instantiate html parser and get header javaxt.html.Parser parser = new javaxt.html.Parser(html); javaxt.html.Element head = parser.getElementByTagName("head"); if (head==null){ long lastUpdate = htmlFile.getLastModifiedTime().getTime(); response.setContentType("text/html"); response.write(html, lastUpdate); return; } String header = head.getOuterHTML(); //Generate XML with scripts and links found in the header ArrayList<String> headerNodes = new ArrayList<>(); HashMap<Integer, Integer> updates = new HashMap<>(); StringBuilder str = new StringBuilder(); str.append("<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?>\r\n"); str.append("<links>\r\n"); for (javaxt.html.Element el : head.getChildNodes()){ String tagName = el.getName(); if (tagName==null) continue; tagName = tagName.toLowerCase(); String url = null; if (tagName.equals("script")){ url = el.getAttribute("src"); } else if (tagName.equals("link")){ url = el.getAttribute("href"); } if (!(url==null || url.isEmpty())){ String t = url.toLowerCase(); if (!t.startsWith("http://") && !t.startsWith("https://") && !t.startsWith("//")){ str.append("\r\n"); str.append(el.toString()); if (!el.isClosed()){ str.append("</" + el.getName() + ">"); } updates.put(updates.size(), headerNodes.size()); } } headerNodes.add(el.toString()); } str.append("</links>"); org.w3c.dom.Document xml = createDocument(str.toString()); //Update links in the XML long lastUpdate; try{ lastUpdate = updateLinks(htmlFile, xml); } catch(Exception e){ throw new RuntimeException(e); } //Update header nodes Node[] nodes = getNodes(getOuterNode(xml).getChildNodes()); HashSet<String> simpleNodes = new HashSet<>(); for (Node node : nodes){ String nodeName = node.getNodeName().toLowerCase(); if (nodeName.equals("script")) { String url = getAttributeValue(node, "src"); if (url.length()==0) continue; simpleNodes.add("script|"+url); } else if (nodeName.equals("link")){ String url = getAttributeValue(node, "href"); if (url.length()==0) continue; simpleNodes.add("link|"+url); } } for (int i=0; i<nodes.length; i++){ Node node = nodes[i]; String nodeName = node.getNodeName().toLowerCase(); //Convert node into an HTML string String txt = ""; if (nodeName.equals("scripts")){ //wildcard replacements for (Node n : getElementsByTagName("script", node)){ //Skip node if a similar node is found in the header String url = getAttributeValue(n, "src"); if (simpleNodes.contains("script|"+url)) continue; //Add node txt += updateTag(n) + "\r\n"; } } else if (nodeName.equals("links")){ //wildcard replacements for (Node n : getElementsByTagName("link", node)){ //Skip node if a similar node is found in the header String url = getAttributeValue(n, "href"); if (simpleNodes.contains("link|"+url)) continue; //Add node txt += updateTag(n) + "\r\n"; } } else{ txt = updateTag(node); } //Replace entry in headerNodes int x = updates.get(i); headerNodes.set(x, txt); } //Replace header in the html document str = new StringBuilder("<head>"); for (String s : headerNodes){ str.append("\r\n"); str.append(s); } str.append("\r\n</head>"); html = html.replace(header, str.toString()); //Set content type and send response response.setContentType("text/html"); response.write(html, lastUpdate); return; } else if (ext.equals("xml")){ //Check whether the xml file is a javaxt-specific file //with CSS and JS includes. If so, add version numbers to //the js and css files sourced in the xml document. javaxt.io.File xmlFile = new javaxt.io.File(file); org.w3c.dom.Document xml = xmlFile.getXML(); String outerNode = getOuterNode(xml).getNodeName(); if (outerNode.equals("application") || outerNode.equals("includes")){ //Update links to scripts and css files long lastUpdate; try{ lastUpdate = updateLinks(xmlFile, xml); } catch(Exception e){ throw new RuntimeException(e); } //Set content type and send response response.setContentType("application/xml"); response.write(getText(xml), lastUpdate); return; } } } //Send file response.write(file, javaxt.io.File.getContentType(file.getName()), true); } //************************************************************************** //** updateLinks //************************************************************************** /** Used to update links to scripts and css files by appending a version * number to the urls (?v=12345678). This operation is multi-threaded to * improve performance. * @return Long representing a timestamp associated with the most recent * file update */ public long updateLinks(javaxt.io.File xmlFile, org.w3c.dom.Document xml) throws Exception { //Generate list of nodes ArrayList<Node> includes = new ArrayList<>(); for (Node node : getElementsByTagName("script", xml)) includes.add(node); for (Node node : getElementsByTagName("link", xml)) includes.add(node); //Update links long t = updateLinks(xmlFile, includes); //Replace nested nodes ArrayList<Node> orgNodes = new ArrayList<>(); for (Node node : getElementsByTagName("script", xml)) orgNodes.add(node); for (Node node : getElementsByTagName("link", xml)) orgNodes.add(node); for (int i=0; i<includes.size(); i++){ Node node = includes.get(i); Node orgNode = orgNodes.get(i); Node parentNode = orgNode.getParentNode(); String nodeName = node.getNodeName().toLowerCase(); if (nodeName.equals("scripts") || nodeName.equals("links")){ node = xml.adoptNode(node); parentNode.insertBefore(node, orgNode); parentNode.removeChild(orgNode); } } return t; } //************************************************************************** //** updateLinks //************************************************************************** public long updateLinks(javaxt.io.File xmlFile, ArrayList<Node> nodes) throws Exception { //Start building unique list of file dates ConcurrentHashMap<Long, Boolean> uniqueDates = new ConcurrentHashMap<>(); if (xmlFile.exists()) uniqueDates.put(xmlFile.getDate().getTime(), true); //Instantiate the ThreadPool ThreadPool pool = new ThreadPool(4){ public void process(Object obj){ Node node = (Node) obj; String nodeName = node.getNodeName().toLowerCase(); if (nodeName.equals("script")){ //Get String src = getAttributeValue(node, "src");link String src = getAttributeValue(node, "src"); if (src.length()==0) return; //console.log(src); //Update link try{ String path = getPath(src); if (path.contains("*")){ //Special case for wildcard links //Create new xml document StringBuilder str = new StringBuilder(); str.append("<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?>\r\n"); str.append("<scripts>\r\n"); for (String link : getWildcardLinks(src, path)){ str.append("<script src=\""); str.append(link); str.append("\"></script>\r\n"); } str.append("</scripts>"); //console.log(str); //Replace original node with new nodes org.w3c.dom.Document xml = createDocument(str.toString()); synchronized(nodes){ int idx = nodes.indexOf(node); nodes.set(idx, getOuterNode(xml)); } } else{ //Append version number to the path javaxt.io.File jsFile = new javaxt.io.File(path); if (jsFile.exists()){ long lastModified = jsFile.getLastModifiedTime().getTime(); long currVersion = new javaxt.utils.Date(lastModified).toLong(); setAttributeValue(node, "src" , src + "?v=" + currVersion); addDate(lastModified); } } } catch(Exception e){ //e.printStackTrace(); //System.out.println("Invalid path? " + src); } } else if (nodeName.equals("link")){ //Update links to css files String href = getAttributeValue(node, "href"); String type = getAttributeValue(node, "type"); String rel = getAttributeValue(node, "rel"); boolean isStyleSheet = type.equalsIgnoreCase("text/css"); if (!isStyleSheet) isStyleSheet = rel.equalsIgnoreCase("stylesheet"); if (href.length()>0 && isStyleSheet){ try{ String path = getPath(href); if (path.contains("*")){ //Special case for wildcard links //Create new xml document StringBuilder str = new StringBuilder(); str.append("<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?>\r\n"); str.append("<links>\r\n"); for (String link : getWildcardLinks(href, path)){ str.append("<link href=\""); str.append(link); str.append("\" rel=\"stylesheet\" />\r\n"); } str.append("</links>"); //console.log(str); //Replace original node with new nodes org.w3c.dom.Document xml = createDocument(str.toString()); synchronized(nodes){ int idx = nodes.indexOf(node); nodes.set(idx, getOuterNode(xml)); } } else{ javaxt.io.File cssFile = new javaxt.io.File(path); if (cssFile.exists()){ //Append version number to the path long lastModified = cssFile.getLastModifiedTime().getTime(); long currVersion = new javaxt.utils.Date(lastModified).toLong(); setAttributeValue(node, "href" , href + "?v=" + currVersion); addDate(lastModified); } } } catch(Exception e){ //e.printStackTrace(); //System.out.println("Invalid path? " + href); } } } } private ArrayList<String> getWildcardLinks(String src, String path) throws Exception { //Get file path javaxt.io.File f = new javaxt.io.File(path); javaxt.io.Directory d = f.getDirectory(); String search = f.getName(); //Build relative path to the files String basePath = src.substring(0, src.indexOf("*")); int x = d.toString().replace("\\", "/").lastIndexOf(basePath); //Find files and return links ArrayList<String> links = new ArrayList<>(); for (javaxt.io.File file : d.getFiles(search, true)){ long lastModified = file.getLastModifiedTime().getTime(); long currVersion = new javaxt.utils.Date(lastModified).toLong(); addDate(lastModified); String p = file.getDirectory().toString().replace("\\", "/").substring(x); links.add(p + file.getName() + "?v=" + currVersion); //Files copied/pasted from another source may retain their //original timestamp. If these includes are older than any //other files, the newly added files will be missed on the //next load/refresh. As a workaround, we'll include a //timestamp of the parent folder. Copied folders will have a //timestamp of when the folder was copied. addDate(file.getDirectory().getLastModifiedTime().getTime()); } return links; } private String getPath(String relPath){ if (relPath.startsWith("/")){ relPath = relPath.substring(1); if (relPath.startsWith("/")) throw new RuntimeException(); return web + relPath; } else{ return xmlFile.MapPath(relPath); } } private void addDate(long lastModified) throws Exception { java.util.HashSet<Long> dates = (java.util.HashSet<Long>) get("dates"); if (dates==null){ dates = new java.util.HashSet<>(); set("dates", dates); } dates.add(lastModified); } public void exit(){ java.util.HashSet<Long> dates = (java.util.HashSet<Long>) get("dates"); if (dates==null || dates.isEmpty()) return; synchronized(uniqueDates){ java.util.Iterator<Long> it = dates.iterator(); while (it.hasNext()){ uniqueDates.put(it.next(), true); } uniqueDates.notify(); } } }.start(); //Insert records for (Node node : nodes){ pool.add(node); } //Notify the pool that we have finished added records and Wait for threads to finish pool.done(); pool.join(); //Get most recent file date java.util.TreeSet<Long> dates = new java.util.TreeSet<>(); dates.addAll(uniqueDates.keySet()); return dates.last(); } //************************************************************************** //** updateNodes //************************************************************************** /** Adds empty comment blocks to "childless" nodes to prevent self-enclosing * tags. */ public void updateNodes(NodeList nodes, org.w3c.dom.Document xml){ for (int i=0; i<nodes.getLength(); i++){ Node node = nodes.item(i); if (node.getNodeType()==1){ if (hasChildren(node)){ updateNodes(node.getChildNodes(), xml); } else{ updateNode(node, xml); } } } } //************************************************************************** //** updateNode //************************************************************************** /** Adds an empty comment block to a node to prevent self-enclosing tags. */ public void updateNode(Node node, org.w3c.dom.Document xml){ try{ node.appendChild(xml.createComment(" ")); } catch(Exception e){ //System.out.println(node.getNodeName()); } } //************************************************************************** //** updateTag //************************************************************************** /** Returns a HTML string for a given node. Replaces any self-enclosing tags * as needed. */ private String updateTag(Node node){ String txt = getText(node); String nodeName = node.getNodeName().toLowerCase(); if (txt.endsWith("/>") && nodeName.equals("script")){ txt = txt.substring(0, txt.length()-2); txt += "></" + nodeName + ">"; } return txt; } //************************************************************************** //** isValidPath //************************************************************************** /** Returns false if the given path contains illegal directives or to point * hidden or protected files. */ private static boolean isValidPath(String str){ str = str.replace("\\", "/"); if (str.contains("..") || str.contains("/.") || str.toLowerCase().contains("/keystore")){ return false; } return true; } } |
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