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| <pre><span class="source-line-no">001</span><span id="line-1">/*</span> |
| <span class="source-line-no">002</span><span id="line-2"> * Licensed to the Apache Software Foundation (ASF) under one</span> |
| <span class="source-line-no">003</span><span id="line-3"> * or more contributor license agreements. See the NOTICE file</span> |
| <span class="source-line-no">004</span><span id="line-4"> * distributed with this work for additional information</span> |
| <span class="source-line-no">005</span><span id="line-5"> * regarding copyright ownership. The ASF licenses this file</span> |
| <span class="source-line-no">006</span><span id="line-6"> * to you under the Apache License, Version 2.0 (the</span> |
| <span class="source-line-no">007</span><span id="line-7"> * "License"); you may not use this file except in compliance</span> |
| <span class="source-line-no">008</span><span id="line-8"> * with the License. You may obtain a copy of the License at</span> |
| <span class="source-line-no">009</span><span id="line-9"> *</span> |
| <span class="source-line-no">010</span><span id="line-10"> * http://www.apache.org/licenses/LICENSE-2.0</span> |
| <span class="source-line-no">011</span><span id="line-11"> *</span> |
| <span class="source-line-no">012</span><span id="line-12"> * Unless required by applicable law or agreed to in writing, software</span> |
| <span class="source-line-no">013</span><span id="line-13"> * distributed under the License is distributed on an "AS IS" BASIS,</span> |
| <span class="source-line-no">014</span><span id="line-14"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span> |
| <span class="source-line-no">015</span><span id="line-15"> * See the License for the specific language governing permissions and</span> |
| <span class="source-line-no">016</span><span id="line-16"> * limitations under the License.</span> |
| <span class="source-line-no">017</span><span id="line-17"> */</span> |
| <span class="source-line-no">018</span><span id="line-18">package org.apache.hadoop.hbase.http;</span> |
| <span class="source-line-no">019</span><span id="line-19"></span> |
| <span class="source-line-no">020</span><span id="line-20">import java.io.File;</span> |
| <span class="source-line-no">021</span><span id="line-21">import java.io.IOException;</span> |
| <span class="source-line-no">022</span><span id="line-22">import java.util.regex.Pattern;</span> |
| <span class="source-line-no">023</span><span id="line-23">import javax.servlet.ServletException;</span> |
| <span class="source-line-no">024</span><span id="line-24">import javax.servlet.http.HttpServletRequest;</span> |
| <span class="source-line-no">025</span><span id="line-25">import javax.servlet.http.HttpServletResponse;</span> |
| <span class="source-line-no">026</span><span id="line-26">import org.apache.yetus.audience.InterfaceAudience;</span> |
| <span class="source-line-no">027</span><span id="line-27">import org.slf4j.Logger;</span> |
| <span class="source-line-no">028</span><span id="line-28">import org.slf4j.LoggerFactory;</span> |
| <span class="source-line-no">029</span><span id="line-29"></span> |
| <span class="source-line-no">030</span><span id="line-30">import org.apache.hbase.thirdparty.org.eclipse.jetty.servlet.DefaultServlet;</span> |
| <span class="source-line-no">031</span><span id="line-31"></span> |
| <span class="source-line-no">032</span><span id="line-32">/**</span> |
| <span class="source-line-no">033</span><span id="line-33"> * Servlet to serve files generated by {@link ProfileServlet}</span> |
| <span class="source-line-no">034</span><span id="line-34"> */</span> |
| <span class="source-line-no">035</span><span id="line-35">@InterfaceAudience.Private</span> |
| <span class="source-line-no">036</span><span id="line-36">public class ProfileOutputServlet extends DefaultServlet {</span> |
| <span class="source-line-no">037</span><span id="line-37"> private static final long serialVersionUID = 1L;</span> |
| <span class="source-line-no">038</span><span id="line-38"> private static final Logger LOG = LoggerFactory.getLogger(ProfileOutputServlet.class);</span> |
| <span class="source-line-no">039</span><span id="line-39"> private static final int REFRESH_PERIOD = 2;</span> |
| <span class="source-line-no">040</span><span id="line-40"> // Alphanumeric characters, plus percent (url-encoding), equals, ampersand, dot and hyphen</span> |
| <span class="source-line-no">041</span><span id="line-41"> private static final Pattern ALPHA_NUMERIC = Pattern.compile("[a-zA-Z0-9%=&.\\-]*");</span> |
| <span class="source-line-no">042</span><span id="line-42"></span> |
| <span class="source-line-no">043</span><span id="line-43"> @Override</span> |
| <span class="source-line-no">044</span><span id="line-44"> protected void doGet(final HttpServletRequest req, final HttpServletResponse resp)</span> |
| <span class="source-line-no">045</span><span id="line-45"> throws ServletException, IOException {</span> |
| <span class="source-line-no">046</span><span id="line-46"> String absoluteDiskPath = getServletContext().getRealPath(req.getPathInfo());</span> |
| <span class="source-line-no">047</span><span id="line-47"> File requestedFile = new File(absoluteDiskPath);</span> |
| <span class="source-line-no">048</span><span id="line-48"> // async-profiler version 1.4 writes 'Started [cpu] profiling' to output file when profiler is</span> |
| <span class="source-line-no">049</span><span id="line-49"> // running which gets replaced by final output. If final output is not ready yet, the file size</span> |
| <span class="source-line-no">050</span><span id="line-50"> // will be <100 bytes (in all modes).</span> |
| <span class="source-line-no">051</span><span id="line-51"> if (requestedFile.length() < 100) {</span> |
| <span class="source-line-no">052</span><span id="line-52"> LOG.info(requestedFile + " is incomplete. Sending auto-refresh header.");</span> |
| <span class="source-line-no">053</span><span id="line-53"> String refreshUrl = req.getRequestURI();</span> |
| <span class="source-line-no">054</span><span id="line-54"> // Rebuild the query string (if we have one)</span> |
| <span class="source-line-no">055</span><span id="line-55"> if (req.getQueryString() != null) {</span> |
| <span class="source-line-no">056</span><span id="line-56"> refreshUrl += "?" + sanitize(req.getQueryString());</span> |
| <span class="source-line-no">057</span><span id="line-57"> }</span> |
| <span class="source-line-no">058</span><span id="line-58"> ProfileServlet.setResponseHeader(resp);</span> |
| <span class="source-line-no">059</span><span id="line-59"> resp.setHeader("Refresh", REFRESH_PERIOD + ";" + refreshUrl);</span> |
| <span class="source-line-no">060</span><span id="line-60"> resp.getWriter().write("This page will be auto-refreshed every " + REFRESH_PERIOD</span> |
| <span class="source-line-no">061</span><span id="line-61"> + " seconds until the output file is ready. Redirecting to " + refreshUrl);</span> |
| <span class="source-line-no">062</span><span id="line-62"> } else {</span> |
| <span class="source-line-no">063</span><span id="line-63"> super.doGet(req, resp);</span> |
| <span class="source-line-no">064</span><span id="line-64"> }</span> |
| <span class="source-line-no">065</span><span id="line-65"> }</span> |
| <span class="source-line-no">066</span><span id="line-66"></span> |
| <span class="source-line-no">067</span><span id="line-67"> static String sanitize(String input) {</span> |
| <span class="source-line-no">068</span><span id="line-68"> // Basic test to try to avoid any XSS attacks or HTML content showing up.</span> |
| <span class="source-line-no">069</span><span id="line-69"> // Duplicates HtmlQuoting a little, but avoid destroying ampersand.</span> |
| <span class="source-line-no">070</span><span id="line-70"> if (ALPHA_NUMERIC.matcher(input).matches()) {</span> |
| <span class="source-line-no">071</span><span id="line-71"> return input;</span> |
| <span class="source-line-no">072</span><span id="line-72"> }</span> |
| <span class="source-line-no">073</span><span id="line-73"> throw new RuntimeException("Non-alphanumeric data found in input, aborting.");</span> |
| <span class="source-line-no">074</span><span id="line-74"> }</span> |
| <span class="source-line-no">075</span><span id="line-75">}</span> |
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| </pre> |
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