<%@ page contentType="text/html; charset=UTF-8" import="javax.servlet.*" import="javax.servlet.http.*" import="java.io.*" import="java.util.*" import="java.net.*" import="org.apache.hadoop.hdfs.*" import="org.apache.hadoop.hdfs.server.namenode.*" import="org.apache.hadoop.hdfs.server.datanode.*" import="org.apache.hadoop.hdfs.server.common.*" import="org.apache.hadoop.hdfs.protocol.*" import="org.apache.hadoop.io.*" import="org.apache.hadoop.conf.*" import="org.apache.hadoop.net.DNS" import="org.apache.hadoop.security.token.Token" import="org.apache.hadoop.hdfs.security.token.block.BlockTokenIdentifier" import="org.apache.hadoop.hdfs.security.token.block.BlockTokenSecretManager" import="org.apache.hadoop.security.UserGroupInformation" import="org.apache.hadoop.util.*" import="org.apache.hadoop.http.HtmlQuoting" import="java.text.DateFormat" %> <%! static JspHelper jspHelper = new JspHelper(); 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 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(""); out.print("Download this file
"); 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("Tail this file
"); out.print("
"); out.print("Chunk size to view (in bytes, up to file's DFS block size): "); out.print(""); out.print(""); out.print(""); out.print(""); out.print(""); out.print(""); out.print(""); out.print("  "); out.print("
"); out.print("
"); out.print(""); out.print("Total number of blocks: "+blocks.size()+"
"); //generate a table and dump the info out.println("\n"); for (LocatedBlock cur : blocks) { out.print(""); blockId = cur.getBlock().getBlockId(); blockSize = cur.getBlock().getNumBytes(); String blk = "blk_" + Long.toString(blockId); out.print(""); DatanodeInfo[] locs = cur.getLocations(); for(int j=0; j " + ""); } out.println(""); } out.println("
"+Long.toString(blockId)+":" + datanodeAddr + "
"); out.print("
"); String namenodeHost = jspHelper.nameNodeAddr.getHostName(); out.print("
Go back to DFS home"); 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 accessToken = BlockTokenSecretManager.DUMMY_TOKEN; if (conf .getBoolean(DFSConfigKeys.DFS_BLOCK_ACCESS_TOKEN_ENABLE_KEY, false)) { List 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("

File: "); JspHelper.printPathWithLinks(HtmlQuoting.quoteHtmlChars(filename), out, namenodeInfoPort, tokenString); out.print("

"); String parent = new File(filename).getParent(); JspHelper.printGotoForm(out, namenodeInfoPort, tokenString, HtmlQuoting.quoteHtmlChars(parent)); out.print("
"); out.print("Go back to dir listing
"); out.print("Advanced view/download options
"); out.print("
"); //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 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("View Next chunk  "); } //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 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("View Prev chunk  "); } out.print("
"); out.print(""); dfs.close(); } %> <%JspHelper.createTitle(out, request, request.getParameter("filename")); %> <% Configuration conf = (Configuration) getServletContext().getAttribute(JspHelper.CURRENT_CONF); generateFileChunks(out, request, conf); %>
<% generateFileDetails(out, request, conf); %>

Local logs

Log directory <% out.println(ServletUtil.htmlFooter()); %>