// postToRestfulApi - // Note: params in the addr field need to be URLEncoded private String postToRestfulApi( String addr, String data, HttpServletRequest request, HttpServletResponse response) { if (localCookie) CookieHandler.setDefault(cm); String result = ""; try { URLConnection connection = new URL(API_ROOT + addr).openConnection(); String cookieVal = getBrowserInfiniteCookie(request); if (cookieVal != null) { connection.addRequestProperty("Cookie", "infinitecookie=" + cookieVal); connection.setDoInput(true); } connection.setDoOutput(true); connection.setRequestProperty("Accept-Charset", "UTF-8"); // Post JSON string to URL OutputStream os = connection.getOutputStream(); byte[] b = data.getBytes("UTF-8"); os.write(b); // Receive results back from API InputStream is = connection.getInputStream(); result = IOUtils.toString(is, "UTF-8"); String newCookie = getConnectionInfiniteCookie(connection); if (newCookie != null && response != null) { setBrowserInfiniteCookie(response, newCookie, request.getServerPort()); } } catch (Exception e) { // System.out.println("Exception: " + e.getMessage()); } return result; } // TESTED
// callRestfulApi - Calls restful API and returns results as a string public String callRestfulApi( String addr, HttpServletRequest request, HttpServletResponse response) { if (localCookie) CookieHandler.setDefault(cm); try { ByteArrayOutputStream output = new ByteArrayOutputStream(); URL url = new URL(API_ROOT + addr); URLConnection urlConnection = url.openConnection(); String cookieVal = getBrowserInfiniteCookie(request); if (cookieVal != null) { urlConnection.addRequestProperty("Cookie", "infinitecookie=" + cookieVal); urlConnection.setDoInput(true); urlConnection.setDoOutput(true); urlConnection.setRequestProperty("Accept-Charset", "UTF-8"); } IOUtils.copy(urlConnection.getInputStream(), output); String newCookie = getConnectionInfiniteCookie(urlConnection); if (newCookie != null && response != null) { setBrowserInfiniteCookie(response, newCookie, request.getServerPort()); } return output.toString(); } catch (IOException e) { System.out.println(e.getMessage()); return null; } } // TESTED
private String mapLocation(String location) { Map<String, List<String>> mappings = site.getMappings(); String bestMatch = ""; String prefix = null; for (Iterator<Entry<String, List<String>>> iterator = mappings.entrySet().iterator(); iterator.hasNext(); ) { Entry<String, List<String>> entry = iterator.next(); List<String> candidates = entry.getValue(); for (Iterator<String> candidateIt = candidates.iterator(); candidateIt.hasNext(); ) { String candidate = candidateIt.next(); if (location.startsWith(candidate) && candidate.length() > bestMatch.length()) { bestMatch = candidate; prefix = entry.getKey(); } } } if (prefix != null) { String reverseMappedPath = prefix + location.substring(bestMatch.length()); try { URI pathlessRequestURI = new URI( request.getScheme(), null, request.getServerName(), request.getServerPort(), null, null, null); return pathlessRequestURI.toString() + reverseMappedPath; } catch (URISyntaxException t) { // best effort System.err.println(t); } } return location; }
public void _jspService(HttpServletRequest request, HttpServletResponse response) throws java.io.IOException, ServletException { PageContext pageContext = null; ServletContext application = null; ServletConfig config = null; JspWriter out = null; Object page = this; JspWriter _jspx_out = null; PageContext _jspx_page_context = null; try { response.setContentType("text/html; charset=ISO-8859-1"); pageContext = _jspxFactory.getPageContext(this, request, response, null, false, 8192, true); _jspx_page_context = pageContext; application = pageContext.getServletContext(); config = pageContext.getServletConfig(); out = pageContext.getOut(); _jspx_out = out; out.write("<!--\n"); out.write("Copyright 2012 The Infinit.e Open Source Project\n"); out.write("\n"); out.write("Licensed under the Apache License, Version 2.0 (the \"License\");\n"); out.write("you may not use this file except in compliance with the License.\n"); out.write("You may obtain a copy of the License at\n"); out.write("\n"); out.write(" http://www.apache.org/licenses/LICENSE-2.0\n"); out.write("\n"); out.write("Unless required by applicable law or agreed to in writing, software\n"); out.write("distributed under the License is distributed on an \"AS IS\" BASIS,\n"); out.write("WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n"); out.write("See the License for the specific language governing permissions and\n"); out.write("limitations under the License.\n"); out.write("-->\n"); out.write("\n"); out.write("\n"); out.write("<!--\n"); out.write("Copyright 2012 The Infinit.e Open Source Project\n"); out.write("\n"); out.write("Licensed under the Apache License, Version 2.0 (the \"License\");\n"); out.write("you may not use this file except in compliance with the License.\n"); out.write("You may obtain a copy of the License at\n"); out.write("\n"); out.write(" http://www.apache.org/licenses/LICENSE-2.0\n"); out.write("\n"); out.write("Unless required by applicable law or agreed to in writing, software\n"); out.write("distributed under the License is distributed on an \"AS IS\" BASIS,\n"); out.write("WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n"); out.write("See the License for the specific language governing permissions and\n"); out.write("limitations under the License.\n"); out.write("-->\n"); out.write("\n"); out.write("\n"); out.write("\n"); out.write("\n"); out.write("\n"); out.write("\n"); out.write("\n"); out.write("\n"); out.write("\n"); out.write("\n"); out.write("\n"); out.write("\n"); out.write("\n"); out.write("\n"); out.write("\n"); out.write("\n"); out.write("\n"); out.write("\n"); out.write("\n"); out.write("\n"); out.write("\n"); out.write('\n'); out.write('\n'); out.write('\n'); // !---------- Read AppConstants.js to get the API_ROOT value ----------! if (API_ROOT == null) { URL baseUrl = new URL(request.getScheme(), request.getServerName(), request.getServerPort(), ""); ScriptEngineManager manager = new ScriptEngineManager(); ScriptEngine engine = manager.getEngineByName("javascript"); String appConstantFile = null; InputStream in = null; // Use file from local deployment always try { in = new FileInputStream(application.getRealPath("/") + "AppConstants.js"); appConstantFile = IOUtils.toString(in); } catch (Exception e) { // System.out.println("Exception: " + e.getMessage()); } // Eval the file as JavaScript through or JS engine and call getEndPointUrl try { engine.eval(appConstantFile); engine.eval("output = getEndPointUrl();"); API_ROOT = (String) engine.get("output"); } catch (Exception e) { // System.out.println("Exception: " + e.getMessage()); } if (null == API_ROOT) { // Default to localhost API_ROOT = "http://localhost:8080/api/"; } if (API_ROOT.contains("localhost")) { localCookie = true; } else { localCookie = false; } } boolean isLoggedIn = false; messageToDisplay = ""; // Page request is a post back from the login form if (request.getParameter("username") != null && request.getParameter("password") != null) { String username = request.getParameter("username"); String password = request.getParameter("password"); isLoggedIn = getLogin(username, password, request, response); // Temp fix, refresh the page to retrieve the new cookie that was set out.println("<meta http-equiv=\"refresh\" content=\"0\">"); } // Make sure user is already logged in and retrieve their user id else { isLoggedIn = isLoggedIn(request, response); } out.write("\n"); out.write("\n"); out.write("\t\n"); out.write('\n'); out.write('\n'); out.write('\n'); messageToDisplay = ""; // if (isLoggedIn) { // Determine which action is being called for by the user String action = ""; if (request.getParameter("action") != null) action = request.getParameter("action").toLowerCase(); if (request.getParameter("dispatchAction") != null) action = request.getParameter("dispatchAction").toLowerCase(); try { if (action.equals("logout")) { logOut(request, response); out.println("<meta http-equiv=\"refresh\" content=\"0;url=index.jsp\">"); } } catch (Exception e) { // System.out.println(e.getMessage()); } } out.write("\n"); out.write("\n"); out.write( "<!DOCTYPE html PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\" \"http://www.w3.org/TR/html4/loose.dtd\">\n"); out.write("<html>\n"); out.write("<head>\n"); out.write("\t<meta http-equiv=\"Content-Type\" content=\"text/html; charset=ISO-8859-1\">\n"); out.write("\t<link rel=\"stylesheet\" type=\"text/css\" href=\"inc/manager.css\" />\n"); out.write("\t<title>Infinit.e.Manager - Home</title>\n"); out.write("</head>\n"); out.write("<body>\n"); out.write("\n"); out.write("<table width=\"100%\" cellpadding=\"0\" cellspacing=\"0\" >\n"); out.write("<tr valign=\"middle\">\n"); out.write("\t<td width=\"100%\" background=\"image/infinite_logo_bg.png\">\n"); out.write("\t\t<table width=\"100%\" cellpadding=\"0\" cellspacing=\"0\" >\n"); out.write("\t\t\t<tr valign=\"bottom\">\n"); out.write( "\t\t\t\t<td width=\"200\"><a href=\"index.jsp\"><img src=\"image/infinite_logo.png\" border=\"0\"></a></td>\n"); out.write("\t\t\t\t<td>\n"); out.write( "\t\t\t\t\t<a href=\"people.jsp\" class=\"headerLink\" title=\"Add/Edit Users\">People</a> \n"); out.write( "\t\t\t\t\t<a href=\"communities.jsp\" class=\"headerLink\" title=\"Add/Edit Communities\">Communities</a> \n"); out.write( "\t\t\t\t\t<a href=\"sources.jsp\" class=\"headerLink\" title=\"Add/Edit Sources\">Sources</a> \n"); out.write( "\t\t\t\t\t<!-- <a href=\"widgets.jsp\" class=\"headerLink\" title=\"Add/Edit Widgets\">Widgets</a> -->\n"); out.write( "\t\t\t\t\t<!-- <a href=\"hadoop.jsp\" class=\"headerLink\" title=\"Add/Edit Hadoop Jars\">Hadoop</a> -->\n"); out.write( "\t\t\t\t\t<!-- <a href=\"shares.jsp\" class=\"headerLink\" title=\"Add/Edit Shares\">Shares</a> -->\n"); out.write( "\t\t\t\t\t<a href=\"index.jsp\" class=\"headerLink\" title=\"Home\">Home</a> \n"); out.write( "\t\t\t\t\t<a href=\"?action=logout\" class=\"headerLink\" title=\"Logout\">Logout</a>\n"); out.write("\t\t\t\t</td>\n"); out.write( "\t\t\t\t<td align=\"right\" width=\"120\" background=\"image/ikanow_logo_smaller_bg.png\"></td>\n"); out.write("\t\t\t</tr>\n"); out.write("\t\t</table>\n"); out.write("\t</td>\n"); out.write("</tr>\n"); out.write("<tr>\n"); out.write("\t<td bgcolor=\"#ffffff\">\n"); out.write('\n'); out.write('\n'); if (!isLoggedIn) { out.write('\n'); out.write(' '); out.write(' '); out.write("<!-- Begin login_form.jsp -->\n"); out.write("\n"); out.write("<br />\n"); out.write("<br />\n"); out.write("<br />\n"); out.write("<br />\n"); out.write("<center>\n"); out.write("<form method=\"post\" name=\"login_form\">\n"); out.write( "<table class=\"standardTable\" cellpadding=\"5\" cellspacing=\"1\" width=\"35%\" >\n"); out.write("\t<tr>\n"); out.write("\t\t<td colspan=\"2\" align=\"center\">\n"); out.write("\t\t\t<font color=\"white\"><b>Login to Infinit.e.Manager</b></font>\n"); out.write("\t\t</td>\n"); out.write("\t</tr>\n"); out.write("\t<tr>\n"); out.write("\t\t<td bgcolor=\"white\" width=\"40%\">User Name:</td>\n"); out.write( "\t\t<td bgcolor=\"white\" width=\"60%\"><input type=\"text\" name=\"username\" size=\"40\"></td>\n"); out.write("\t</tr>\n"); out.write("\t<tr>\n"); out.write("\t\t<td bgcolor=\"white\" width=\"40%\">Password:</td>\n"); out.write( "\t\t<td bgcolor=\"white\" width=\"60%\"><input type=\"password\" name=\"password\" size=\"40\"></td>\n"); out.write("\t</tr>\n"); out.write("\t<tr>\n"); out.write("\t\t<td colspan=\"2\" align=\"right\"><input type=\"submit\"></td>\n"); out.write("\t</tr>\n"); out.write("</table>\n"); out.write("</form>\n"); out.write("</center>\n"); out.write("<br />\n"); out.write("<br />\n"); out.write("<br />\n"); out.write("<br />\n"); out.write("<!-- End login_form.jsp -->"); out.write('\n'); } else { out.write("\n"); out.write( "\t<table class=\"standardTable\" cellpadding=\"5\" cellspacing=\"1\" width=\"100%\" >\n"); out.write("\t<tr>\n"); out.write("\t\t<td width=\"100%\" bgcolor=\"#ffffff\">\n"); out.write("\t\t\t<br />\n"); out.write("\t\t\t<br />\n"); out.write("\t\t\t\n"); out.write("\t\t\t<center>\n"); out.write( "\t\t\t<table class=\"standardTable\" cellpadding=\"5\" cellspacing=\"1\" width=\"50%\">\n"); out.write("\t\t\t\t<tr>\n"); out.write("\t\t\t\t\t<td> </td>\n"); out.write("\t\t\t\t</tr>\n"); out.write("\t\t\t\t<tr>\n"); out.write("\t\t\t\t\t<td bgcolor=\"white\">\n"); out.write("\t\t\t\t\t\t<ul>\n"); out.write( "\t\t\t\t\t\t\t<li><b><a href=\"people.jsp\" title=\"Add/Edit Users\">People</a></b> - Add/Edit Users</li>\n"); out.write( "\t\t\t\t\t\t\t<li><b><a href=\"communities.jsp\" title=\"Add/Edit Users\">Communities</a></b> - Add/Edit Communities and Membership</li>\n"); out.write( "\t\t\t\t\t\t\t<li><b><a href=\"sources.jsp\" title=\"Add/Edit Users\">Sources</a></b> - Add/Edit Sources\n"); out.write( "\t\t\t\t\t\t\t\t<ul><li><b><a href=\"sourcemonitor.jsp\" title=\"Monitor Sources\" target=\"_blank\">Source Monitoring</a></b> (new tab)</li></ul>\n"); out.write("\t\t\t\t\t\t\t</li>\n"); out.write("\t\t\t\t\t\t</ul>\n"); out.write("\t\t\t\t\t\t<ul>\n"); out.write( "\t\t\t\t\t\t\t<li><b><a href=\"fileUploader.jsp\" title=\"Add/Edit Users\" target=\"_blank\">File Uploader</a></b> - Add/Edit Files or JSON (new tab)</li>\n"); out.write( "\t\t\t\t\t\t\t<li><b><a href=\"widgetUploader.jsp\" title=\"Add/Edit Users\" target=\"_blank\">Widget Uploader</a></b> - Add/Edit Widgets (new tab)</li>\n"); out.write( "\t\t\t\t\t\t\t<li><b><a href=\"pluginManager.jsp\" title=\"Add/Edit Users\" target=\"_blank\">Plugin Manager</a></b> - Add/Edit Hadoop Plugins (new tab)</li>\t\t\t\t\t\t\n"); out.write("\t\t\t\t\t\t</ul>\n"); out.write("\t\t\t\t\t\t<ul>\n"); out.write( "\t\t\t\t\t\t\t<li><b><a href=\"chrome.html\" title=\"Install Chrome Source Extension\" target=\"_blank\">Infinit.e Chrome Extension</a></b> - Create Sources from Chrome</li>\n"); out.write("\t\t\t\t\t\t</ul>\n"); out.write("\t\t\t\t\t</td>\n"); out.write("\t\t\t\t</tr>\n"); out.write("\t\t\t</table>\n"); out.write("\t\t\t</center>\n"); out.write("\n"); out.write("\t\t\t<br />\n"); out.write("\t\t\t<br />\n"); out.write("\t\t\t<br />\n"); out.write("\t\t\t<br />\n"); out.write("\t\t\t<br />\n"); out.write("\t\t\t<br />\n"); out.write("\t\t</td>\n"); out.write("\t<tr>\n"); out.write("\t</table>\n"); } out.write('\n'); out.write('\n'); out.write("\t\n"); out.write("\t</td>\n"); out.write("<tr>\n"); out.write("<tr>\n"); out.write("\t<td align=\"right\" bgcolor=\"#000000\">\n"); out.write("\t\t \n"); out.write( "\t\t<!-- <a href=\"http://www.ikanow.com\" title=\"www.ikanow.com\"><img src=\"image/ikanow_logo_small.png\" border=\"0\"></a> -->\n"); out.write("\t</td>\n"); out.write("</tr>\n"); out.write("</table>\n"); out.write("\n"); out.write("\n"); out.write("</body>\n"); out.write("</html>"); } catch (Throwable t) { if (!(t instanceof SkipPageException)) { out = _jspx_out; if (out != null && out.getBufferSize() != 0) try { out.clearBuffer(); } catch (java.io.IOException e) { } if (_jspx_page_context != null) _jspx_page_context.handlePageException(t); } } finally { _jspxFactory.releasePageContext(_jspx_page_context); } }
public void generateFileDetails(JspWriter out, HttpServletRequest req, Configuration conf) throws IOException, InterruptedException { int chunkSizeToView = 0; long startOffset = 0; int datanodePort; String blockIdStr = null; long currBlockId = 0; blockIdStr = req.getParameter("blockId"); if (blockIdStr == null) { out.print("Invalid input (blockId absent)"); return; } currBlockId = Long.parseLong(blockIdStr); String datanodePortStr = req.getParameter("datanodePort"); if (datanodePortStr == null) { out.print("Invalid input (datanodePort absent)"); return; } datanodePort = Integer.parseInt(datanodePortStr); String namenodeInfoPortStr = req.getParameter("namenodeInfoPort"); int namenodeInfoPort = -1; if (namenodeInfoPortStr != null) namenodeInfoPort = Integer.parseInt(namenodeInfoPortStr); String chunkSizeToViewStr = req.getParameter("chunkSizeToView"); if (chunkSizeToViewStr != null && Integer.parseInt(chunkSizeToViewStr) > 0) { chunkSizeToView = Integer.parseInt(chunkSizeToViewStr); } else { chunkSizeToView = JspHelper.getDefaultChunkSize(conf); } String startOffsetStr = req.getParameter("startOffset"); if (startOffsetStr == null || Long.parseLong(startOffsetStr) < 0) startOffset = 0; else startOffset = Long.parseLong(startOffsetStr); String filename = HtmlQuoting.unquoteHtmlChars(req.getParameter("filename")); if (filename == null || filename.length() == 0) { out.print("Invalid input"); return; } String blockSizeStr = req.getParameter("blockSize"); long blockSize = 0; if (blockSizeStr == null || blockSizeStr.length() == 0) { out.print("Invalid input"); return; } blockSize = Long.parseLong(blockSizeStr); String tokenString = req.getParameter(JspHelper.DELEGATION_PARAMETER_NAME); UserGroupInformation ugi = JspHelper.getUGI(req, conf); DFSClient dfs = JspHelper.getDFSClient(ugi, jspHelper.nameNodeAddr, conf); List<LocatedBlock> blocks = dfs.namenode.getBlockLocations(filename, 0, Long.MAX_VALUE).getLocatedBlocks(); // Add the various links for looking at the file contents // URL for downloading the full file String downloadUrl = "http://" + req.getServerName() + ":" + +req.getServerPort() + "/streamFile" + URLEncoder.encode(filename, "UTF-8") + "?" + JspHelper.DELEGATION_PARAMETER_NAME + "=" + tokenString; out.print("<a name=\"viewOptions\"></a>"); out.print("<a href=\"" + downloadUrl + "\">Download this file</a><br>"); DatanodeInfo chosenNode; // URL for TAIL LocatedBlock lastBlk = blocks.get(blocks.size() - 1); long blockId = lastBlk.getBlock().getBlockId(); try { chosenNode = jspHelper.bestNode(lastBlk); } catch (IOException e) { out.print(e.toString()); dfs.close(); return; } String fqdn = InetAddress.getByName(chosenNode.getHost()).getCanonicalHostName(); String tailUrl = "http://" + fqdn + ":" + chosenNode.getInfoPort() + "/tail.jsp?filename=" + URLEncoder.encode(filename, "UTF-8") + "&namenodeInfoPort=" + namenodeInfoPort + "&chunkSizeToView=" + chunkSizeToView + "&referrer=" + URLEncoder.encode(req.getRequestURL() + "?" + req.getQueryString(), "UTF-8") + JspHelper.getDelegationTokenUrlParam(tokenString); out.print("<a href=\"" + tailUrl + "\">Tail this file</a><br>"); out.print("<form action=\"/browseBlock.jsp\" method=GET>"); out.print("<b>Chunk size to view (in bytes, up to file's DFS block size): </b>"); out.print("<input type=\"hidden\" name=\"blockId\" value=\"" + currBlockId + "\">"); out.print("<input type=\"hidden\" name=\"blockSize\" value=\"" + blockSize + "\">"); out.print("<input type=\"hidden\" name=\"startOffset\" value=\"" + startOffset + "\">"); out.print("<input type=\"hidden\" name=\"filename\" value=\"" + filename + "\">"); out.print("<input type=\"hidden\" name=\"datanodePort\" value=\"" + datanodePort + "\">"); out.print( "<input type=\"hidden\" name=\"namenodeInfoPort\" value=\"" + namenodeInfoPort + "\">"); out.print( "<input type=\"text\" name=\"chunkSizeToView\" value=" + chunkSizeToView + " size=10 maxlength=10>"); out.print(" <input type=\"submit\" name=\"submit\" value=\"Refresh\">"); out.print("</form>"); out.print("<hr>"); out.print("<a name=\"blockDetails\"></a>"); out.print("<B>Total number of blocks: " + blocks.size() + "</B><br>"); // generate a table and dump the info out.println("\n<table>"); for (LocatedBlock cur : blocks) { out.print("<tr>"); blockId = cur.getBlock().getBlockId(); blockSize = cur.getBlock().getNumBytes(); String blk = "blk_" + Long.toString(blockId); out.print("<td>" + Long.toString(blockId) + ":</td>"); DatanodeInfo[] locs = cur.getLocations(); for (int j = 0; j < locs.length; j++) { String datanodeAddr = locs[j].getName(); datanodePort = Integer.parseInt( datanodeAddr.substring(datanodeAddr.indexOf(':') + 1, datanodeAddr.length())); fqdn = InetAddress.getByName(locs[j].getHost()).getCanonicalHostName(); String blockUrl = "http://" + fqdn + ":" + locs[j].getInfoPort() + "/browseBlock.jsp?blockId=" + Long.toString(blockId) + "&blockSize=" + blockSize + "&filename=" + URLEncoder.encode(filename, "UTF-8") + "&datanodePort=" + datanodePort + "&genstamp=" + cur.getBlock().getGenerationStamp() + "&namenodeInfoPort=" + namenodeInfoPort + "&chunkSizeToView=" + chunkSizeToView; out.print( "<td> </td>" + "<td><a href=\"" + blockUrl + "\">" + datanodeAddr + "</a></td>"); } out.println("</tr>"); } out.println("</table>"); out.print("<hr>"); String namenodeHost = jspHelper.nameNodeAddr.getHostName(); out.print( "<br><a href=\"http://" + InetAddress.getByName(namenodeHost).getCanonicalHostName() + ":" + namenodeInfoPort + "/dfshealth.jsp\">Go back to DFS home</a>"); dfs.close(); }
public void generateFileChunks(JspWriter out, HttpServletRequest req, Configuration conf) throws IOException, InterruptedException { long startOffset = 0; int datanodePort = 0; int chunkSizeToView = 0; String namenodeInfoPortStr = req.getParameter("namenodeInfoPort"); int namenodeInfoPort = -1; if (namenodeInfoPortStr != null) namenodeInfoPort = Integer.parseInt(namenodeInfoPortStr); String filename = HtmlQuoting.unquoteHtmlChars(req.getParameter("filename")); if (filename == null) { out.print("Invalid input (filename absent)"); return; } String blockIdStr = null; long blockId = 0; blockIdStr = req.getParameter("blockId"); if (blockIdStr == null) { out.print("Invalid input (blockId absent)"); return; } blockId = Long.parseLong(blockIdStr); String tokenString = req.getParameter(JspHelper.DELEGATION_PARAMETER_NAME); UserGroupInformation ugi = JspHelper.getUGI(req, conf); final DFSClient dfs = JspHelper.getDFSClient(ugi, jspHelper.nameNodeAddr, conf); Token<BlockTokenIdentifier> accessToken = BlockTokenSecretManager.DUMMY_TOKEN; if (conf.getBoolean(DFSConfigKeys.DFS_BLOCK_ACCESS_TOKEN_ENABLE_KEY, false)) { List<LocatedBlock> blks = dfs.namenode.getBlockLocations(filename, 0, Long.MAX_VALUE).getLocatedBlocks(); if (blks == null || blks.size() == 0) { out.print("Can't locate file blocks"); dfs.close(); return; } for (int i = 0; i < blks.size(); i++) { if (blks.get(i).getBlock().getBlockId() == blockId) { accessToken = blks.get(i).getBlockToken(); break; } } } String blockGenStamp = null; long genStamp = 0; blockGenStamp = req.getParameter("genstamp"); if (blockGenStamp == null) { out.print("Invalid input (genstamp absent)"); return; } genStamp = Long.parseLong(blockGenStamp); String blockSizeStr; long blockSize = 0; blockSizeStr = req.getParameter("blockSize"); if (blockSizeStr == null) { out.print("Invalid input (blockSize absent)"); return; } blockSize = Long.parseLong(blockSizeStr); String chunkSizeToViewStr = req.getParameter("chunkSizeToView"); if (chunkSizeToViewStr != null && Integer.parseInt(chunkSizeToViewStr) > 0) chunkSizeToView = Integer.parseInt(chunkSizeToViewStr); else chunkSizeToView = JspHelper.getDefaultChunkSize(conf); String startOffsetStr = req.getParameter("startOffset"); if (startOffsetStr == null || Long.parseLong(startOffsetStr) < 0) startOffset = 0; else startOffset = Long.parseLong(startOffsetStr); String datanodePortStr = req.getParameter("datanodePort"); if (datanodePortStr == null) { out.print("Invalid input (datanodePort absent)"); return; } datanodePort = Integer.parseInt(datanodePortStr); out.print("<h3>File: "); JspHelper.printPathWithLinks( HtmlQuoting.quoteHtmlChars(filename), out, namenodeInfoPort, tokenString); out.print("</h3><hr>"); String parent = new File(filename).getParent(); JspHelper.printGotoForm(out, namenodeInfoPort, tokenString, HtmlQuoting.quoteHtmlChars(parent)); out.print("<hr>"); out.print( "<a href=\"http://" + req.getServerName() + ":" + req.getServerPort() + "/browseDirectory.jsp?dir=" + URLEncoder.encode(parent, "UTF-8") + "&namenodeInfoPort=" + namenodeInfoPort + "\"><i>Go back to dir listing</i></a><br>"); out.print("<a href=\"#viewOptions\">Advanced view/download options</a><br>"); out.print("<hr>"); // Determine the prev & next blocks long nextStartOffset = 0; long nextBlockSize = 0; String nextBlockIdStr = null; String nextGenStamp = null; String nextHost = req.getServerName(); int nextPort = req.getServerPort(); int nextDatanodePort = datanodePort; // determine data for the next link if (startOffset + chunkSizeToView >= blockSize) { // we have to go to the next block from this point onwards List<LocatedBlock> blocks = dfs.namenode.getBlockLocations(filename, 0, Long.MAX_VALUE).getLocatedBlocks(); for (int i = 0; i < blocks.size(); i++) { if (blocks.get(i).getBlock().getBlockId() == blockId) { if (i != blocks.size() - 1) { LocatedBlock nextBlock = blocks.get(i + 1); nextBlockIdStr = Long.toString(nextBlock.getBlock().getBlockId()); nextGenStamp = Long.toString(nextBlock.getBlock().getGenerationStamp()); nextStartOffset = 0; nextBlockSize = nextBlock.getBlock().getNumBytes(); DatanodeInfo d = jspHelper.bestNode(nextBlock); String datanodeAddr = d.getName(); nextDatanodePort = Integer.parseInt( datanodeAddr.substring(datanodeAddr.indexOf(':') + 1, datanodeAddr.length())); nextHost = InetAddress.getByName(d.getHost()).getCanonicalHostName(); nextPort = d.getInfoPort(); } } } } else { // we are in the same block nextBlockIdStr = blockIdStr; nextStartOffset = startOffset + chunkSizeToView; nextBlockSize = blockSize; nextGenStamp = blockGenStamp; } String nextUrl = null; if (nextBlockIdStr != null) { nextUrl = "http://" + nextHost + ":" + nextPort + "/browseBlock.jsp?blockId=" + nextBlockIdStr + "&blockSize=" + nextBlockSize + "&startOffset=" + nextStartOffset + "&genstamp=" + nextGenStamp + "&filename=" + URLEncoder.encode(filename, "UTF-8") + "&chunkSizeToView=" + chunkSizeToView + "&datanodePort=" + nextDatanodePort + "&namenodeInfoPort=" + namenodeInfoPort + JspHelper.getDelegationTokenUrlParam(tokenString); out.print("<a href=\"" + nextUrl + "\">View Next chunk</a> "); } // determine data for the prev link String prevBlockIdStr = null; String prevGenStamp = null; long prevStartOffset = 0; long prevBlockSize = 0; String prevHost = req.getServerName(); int prevPort = req.getServerPort(); int prevDatanodePort = datanodePort; if (startOffset == 0) { List<LocatedBlock> blocks = dfs.namenode.getBlockLocations(filename, 0, Long.MAX_VALUE).getLocatedBlocks(); for (int i = 0; i < blocks.size(); i++) { if (blocks.get(i).getBlock().getBlockId() == blockId) { if (i != 0) { LocatedBlock prevBlock = blocks.get(i - 1); prevBlockIdStr = Long.toString(prevBlock.getBlock().getBlockId()); prevGenStamp = Long.toString(prevBlock.getBlock().getGenerationStamp()); prevStartOffset = prevBlock.getBlock().getNumBytes() - chunkSizeToView; if (prevStartOffset < 0) prevStartOffset = 0; prevBlockSize = prevBlock.getBlock().getNumBytes(); DatanodeInfo d = jspHelper.bestNode(prevBlock); String datanodeAddr = d.getName(); prevDatanodePort = Integer.parseInt( datanodeAddr.substring(datanodeAddr.indexOf(':') + 1, datanodeAddr.length())); prevHost = InetAddress.getByName(d.getHost()).getCanonicalHostName(); prevPort = d.getInfoPort(); } } } } else { // we are in the same block prevBlockIdStr = blockIdStr; prevStartOffset = startOffset - chunkSizeToView; if (prevStartOffset < 0) prevStartOffset = 0; prevBlockSize = blockSize; prevGenStamp = blockGenStamp; } String prevUrl = null; if (prevBlockIdStr != null) { prevUrl = "http://" + prevHost + ":" + prevPort + "/browseBlock.jsp?blockId=" + prevBlockIdStr + "&blockSize=" + prevBlockSize + "&startOffset=" + prevStartOffset + "&filename=" + URLEncoder.encode(filename, "UTF-8") + "&chunkSizeToView=" + chunkSizeToView + "&genstamp=" + prevGenStamp + "&datanodePort=" + prevDatanodePort + "&namenodeInfoPort=" + namenodeInfoPort + JspHelper.getDelegationTokenUrlParam(tokenString); out.print("<a href=\"" + prevUrl + "\">View Prev chunk</a> "); } out.print("<hr>"); out.print("<textarea cols=\"100\" rows=\"25\" wrap=\"virtual\" style=\"width:100%\" READONLY>"); try { jspHelper.streamBlockInAscii( new InetSocketAddress(req.getServerName(), datanodePort), blockId, accessToken, genStamp, blockSize, startOffset, chunkSizeToView, out, conf); } catch (Exception e) { out.print(e); } out.print("</textarea>"); dfs.close(); }