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| <pre><span class="sourceLineNo">001</span>/*<a name="line.1"></a> |
| <span class="sourceLineNo">002</span> * Licensed to the Apache Software Foundation (ASF) under one<a name="line.2"></a> |
| <span class="sourceLineNo">003</span> * or more contributor license agreements. See the NOTICE file<a name="line.3"></a> |
| <span class="sourceLineNo">004</span> * distributed with this work for additional information<a name="line.4"></a> |
| <span class="sourceLineNo">005</span> * regarding copyright ownership. The ASF licenses this file<a name="line.5"></a> |
| <span class="sourceLineNo">006</span> * to you under the Apache License, Version 2.0 (the<a name="line.6"></a> |
| <span class="sourceLineNo">007</span> * "License"); you may not use this file except in compliance<a name="line.7"></a> |
| <span class="sourceLineNo">008</span> * with the License. You may obtain a copy of the License at<a name="line.8"></a> |
| <span class="sourceLineNo">009</span> *<a name="line.9"></a> |
| <span class="sourceLineNo">010</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.10"></a> |
| <span class="sourceLineNo">011</span> *<a name="line.11"></a> |
| <span class="sourceLineNo">012</span> * Unless required by applicable law or agreed to in writing, software<a name="line.12"></a> |
| <span class="sourceLineNo">013</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.13"></a> |
| <span class="sourceLineNo">014</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.14"></a> |
| <span class="sourceLineNo">015</span> * See the License for the specific language governing permissions and<a name="line.15"></a> |
| <span class="sourceLineNo">016</span> * limitations under the License.<a name="line.16"></a> |
| <span class="sourceLineNo">017</span> */<a name="line.17"></a> |
| <span class="sourceLineNo">018</span>package org.apache.hadoop.hbase.http;<a name="line.18"></a> |
| <span class="sourceLineNo">019</span><a name="line.19"></a> |
| <span class="sourceLineNo">020</span>import java.io.File;<a name="line.20"></a> |
| <span class="sourceLineNo">021</span>import java.io.IOException;<a name="line.21"></a> |
| <span class="sourceLineNo">022</span>import java.util.regex.Pattern;<a name="line.22"></a> |
| <span class="sourceLineNo">023</span><a name="line.23"></a> |
| <span class="sourceLineNo">024</span>import javax.servlet.ServletException;<a name="line.24"></a> |
| <span class="sourceLineNo">025</span>import javax.servlet.http.HttpServletRequest;<a name="line.25"></a> |
| <span class="sourceLineNo">026</span>import javax.servlet.http.HttpServletResponse;<a name="line.26"></a> |
| <span class="sourceLineNo">027</span><a name="line.27"></a> |
| <span class="sourceLineNo">028</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.28"></a> |
| <span class="sourceLineNo">029</span>import org.eclipse.jetty.servlet.DefaultServlet;<a name="line.29"></a> |
| <span class="sourceLineNo">030</span>import org.slf4j.Logger;<a name="line.30"></a> |
| <span class="sourceLineNo">031</span>import org.slf4j.LoggerFactory;<a name="line.31"></a> |
| <span class="sourceLineNo">032</span><a name="line.32"></a> |
| <span class="sourceLineNo">033</span>/**<a name="line.33"></a> |
| <span class="sourceLineNo">034</span> * Servlet to serve files generated by {@link ProfileServlet}<a name="line.34"></a> |
| <span class="sourceLineNo">035</span> */<a name="line.35"></a> |
| <span class="sourceLineNo">036</span>@InterfaceAudience.Private<a name="line.36"></a> |
| <span class="sourceLineNo">037</span>public class ProfileOutputServlet extends DefaultServlet {<a name="line.37"></a> |
| <span class="sourceLineNo">038</span> private static final long serialVersionUID = 1L;<a name="line.38"></a> |
| <span class="sourceLineNo">039</span> private static final Logger LOG = LoggerFactory.getLogger(ProfileOutputServlet.class);<a name="line.39"></a> |
| <span class="sourceLineNo">040</span> private static final int REFRESH_PERIOD = 2;<a name="line.40"></a> |
| <span class="sourceLineNo">041</span> // Alphanumeric characters, plus percent (url-encoding), equals, and ampersand<a name="line.41"></a> |
| <span class="sourceLineNo">042</span> private static final Pattern ALPHA_NUMERIC = Pattern.compile("[a-zA-Z0-9\\%\\=\\&]*");<a name="line.42"></a> |
| <span class="sourceLineNo">043</span><a name="line.43"></a> |
| <span class="sourceLineNo">044</span> @Override<a name="line.44"></a> |
| <span class="sourceLineNo">045</span> protected void doGet(final HttpServletRequest req, final HttpServletResponse resp)<a name="line.45"></a> |
| <span class="sourceLineNo">046</span> throws ServletException, IOException {<a name="line.46"></a> |
| <span class="sourceLineNo">047</span> String absoluteDiskPath = getServletContext().getRealPath(req.getPathInfo());<a name="line.47"></a> |
| <span class="sourceLineNo">048</span> File requestedFile = new File(absoluteDiskPath);<a name="line.48"></a> |
| <span class="sourceLineNo">049</span> // async-profiler version 1.4 writes 'Started [cpu] profiling' to output file when profiler is<a name="line.49"></a> |
| <span class="sourceLineNo">050</span> // running which gets replaced by final output. If final output is not ready yet, the file size<a name="line.50"></a> |
| <span class="sourceLineNo">051</span> // will be <100 bytes (in all modes).<a name="line.51"></a> |
| <span class="sourceLineNo">052</span> if (requestedFile.length() < 100) {<a name="line.52"></a> |
| <span class="sourceLineNo">053</span> LOG.info(requestedFile + " is incomplete. Sending auto-refresh header.");<a name="line.53"></a> |
| <span class="sourceLineNo">054</span> String refreshUrl = req.getRequestURI();<a name="line.54"></a> |
| <span class="sourceLineNo">055</span> // Rebuild the query string (if we have one)<a name="line.55"></a> |
| <span class="sourceLineNo">056</span> if (req.getQueryString() != null) {<a name="line.56"></a> |
| <span class="sourceLineNo">057</span> refreshUrl += "?" + sanitize(req.getQueryString());<a name="line.57"></a> |
| <span class="sourceLineNo">058</span> }<a name="line.58"></a> |
| <span class="sourceLineNo">059</span> ProfileServlet.setResponseHeader(resp);<a name="line.59"></a> |
| <span class="sourceLineNo">060</span> resp.setHeader("Refresh", REFRESH_PERIOD + ";" + refreshUrl);<a name="line.60"></a> |
| <span class="sourceLineNo">061</span> resp.getWriter().write("This page will be auto-refreshed every " + REFRESH_PERIOD +<a name="line.61"></a> |
| <span class="sourceLineNo">062</span> " seconds until the output file is ready. Redirecting to " + refreshUrl);<a name="line.62"></a> |
| <span class="sourceLineNo">063</span> } else {<a name="line.63"></a> |
| <span class="sourceLineNo">064</span> super.doGet(req, resp);<a name="line.64"></a> |
| <span class="sourceLineNo">065</span> }<a name="line.65"></a> |
| <span class="sourceLineNo">066</span> }<a name="line.66"></a> |
| <span class="sourceLineNo">067</span><a name="line.67"></a> |
| <span class="sourceLineNo">068</span> static String sanitize(String input) {<a name="line.68"></a> |
| <span class="sourceLineNo">069</span> // Basic test to try to avoid any XSS attacks or HTML content showing up.<a name="line.69"></a> |
| <span class="sourceLineNo">070</span> // Duplicates HtmlQuoting a little, but avoid destroying ampersand.<a name="line.70"></a> |
| <span class="sourceLineNo">071</span> if (ALPHA_NUMERIC.matcher(input).matches()) {<a name="line.71"></a> |
| <span class="sourceLineNo">072</span> return input;<a name="line.72"></a> |
| <span class="sourceLineNo">073</span> }<a name="line.73"></a> |
| <span class="sourceLineNo">074</span> throw new RuntimeException("Non-alphanumeric data found in input, aborting.");<a name="line.74"></a> |
| <span class="sourceLineNo">075</span> }<a name="line.75"></a> |
| <span class="sourceLineNo">076</span>}<a name="line.76"></a> |
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