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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.log;<a name="line.18"></a>
<span class="sourceLineNo">019</span><a name="line.19"></a>
<span class="sourceLineNo">020</span>import java.io.BufferedReader;<a name="line.20"></a>
<span class="sourceLineNo">021</span>import java.io.FileNotFoundException;<a name="line.21"></a>
<span class="sourceLineNo">022</span>import java.io.IOException;<a name="line.22"></a>
<span class="sourceLineNo">023</span>import java.io.InputStreamReader;<a name="line.23"></a>
<span class="sourceLineNo">024</span>import java.io.PrintWriter;<a name="line.24"></a>
<span class="sourceLineNo">025</span>import java.net.HttpURLConnection;<a name="line.25"></a>
<span class="sourceLineNo">026</span>import java.net.URL;<a name="line.26"></a>
<span class="sourceLineNo">027</span>import java.nio.charset.StandardCharsets;<a name="line.27"></a>
<span class="sourceLineNo">028</span>import java.util.Objects;<a name="line.28"></a>
<span class="sourceLineNo">029</span>import java.util.regex.Pattern;<a name="line.29"></a>
<span class="sourceLineNo">030</span>import javax.net.ssl.HttpsURLConnection;<a name="line.30"></a>
<span class="sourceLineNo">031</span>import javax.net.ssl.SSLSocketFactory;<a name="line.31"></a>
<span class="sourceLineNo">032</span>import javax.servlet.ServletException;<a name="line.32"></a>
<span class="sourceLineNo">033</span>import javax.servlet.http.HttpServlet;<a name="line.33"></a>
<span class="sourceLineNo">034</span>import javax.servlet.http.HttpServletRequest;<a name="line.34"></a>
<span class="sourceLineNo">035</span>import javax.servlet.http.HttpServletResponse;<a name="line.35"></a>
<span class="sourceLineNo">036</span>import org.apache.hadoop.HadoopIllegalArgumentException;<a name="line.36"></a>
<span class="sourceLineNo">037</span>import org.apache.hadoop.conf.Configuration;<a name="line.37"></a>
<span class="sourceLineNo">038</span>import org.apache.hadoop.conf.Configured;<a name="line.38"></a>
<span class="sourceLineNo">039</span>import org.apache.hadoop.hbase.http.HttpServer;<a name="line.39"></a>
<span class="sourceLineNo">040</span>import org.apache.hadoop.hbase.logging.Log4jUtils;<a name="line.40"></a>
<span class="sourceLineNo">041</span>import org.apache.hadoop.security.authentication.client.AuthenticatedURL;<a name="line.41"></a>
<span class="sourceLineNo">042</span>import org.apache.hadoop.security.authentication.client.KerberosAuthenticator;<a name="line.42"></a>
<span class="sourceLineNo">043</span>import org.apache.hadoop.security.ssl.SSLFactory;<a name="line.43"></a>
<span class="sourceLineNo">044</span>import org.apache.hadoop.util.HttpExceptionUtils;<a name="line.44"></a>
<span class="sourceLineNo">045</span>import org.apache.hadoop.util.ServletUtil;<a name="line.45"></a>
<span class="sourceLineNo">046</span>import org.apache.hadoop.util.Tool;<a name="line.46"></a>
<span class="sourceLineNo">047</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.47"></a>
<span class="sourceLineNo">048</span>import org.slf4j.Logger;<a name="line.48"></a>
<span class="sourceLineNo">049</span>import org.slf4j.LoggerFactory;<a name="line.49"></a>
<span class="sourceLineNo">050</span><a name="line.50"></a>
<span class="sourceLineNo">051</span>/**<a name="line.51"></a>
<span class="sourceLineNo">052</span> * Change log level in runtime.<a name="line.52"></a>
<span class="sourceLineNo">053</span> */<a name="line.53"></a>
<span class="sourceLineNo">054</span>@InterfaceAudience.Private<a name="line.54"></a>
<span class="sourceLineNo">055</span>public final class LogLevel {<a name="line.55"></a>
<span class="sourceLineNo">056</span> private static final String USAGES = "\nUsage: General options are:\n"<a name="line.56"></a>
<span class="sourceLineNo">057</span> + "\t[-getlevel &lt;host:port&gt; &lt;classname&gt; [-protocol (http|https)]\n"<a name="line.57"></a>
<span class="sourceLineNo">058</span> + "\t[-setlevel &lt;host:port&gt; &lt;classname&gt; &lt;level&gt; [-protocol (http|https)]";<a name="line.58"></a>
<span class="sourceLineNo">059</span><a name="line.59"></a>
<span class="sourceLineNo">060</span> public static final String PROTOCOL_HTTP = "http";<a name="line.60"></a>
<span class="sourceLineNo">061</span> public static final String PROTOCOL_HTTPS = "https";<a name="line.61"></a>
<span class="sourceLineNo">062</span><a name="line.62"></a>
<span class="sourceLineNo">063</span> public static final String READONLY_LOGGERS_CONF_KEY = "hbase.ui.logLevels.readonly.loggers";<a name="line.63"></a>
<span class="sourceLineNo">064</span><a name="line.64"></a>
<span class="sourceLineNo">065</span> /**<a name="line.65"></a>
<span class="sourceLineNo">066</span> * A command line implementation<a name="line.66"></a>
<span class="sourceLineNo">067</span> */<a name="line.67"></a>
<span class="sourceLineNo">068</span> public static void main(String[] args) throws Exception {<a name="line.68"></a>
<span class="sourceLineNo">069</span> CLI cli = new CLI(new Configuration());<a name="line.69"></a>
<span class="sourceLineNo">070</span> System.exit(cli.run(args));<a name="line.70"></a>
<span class="sourceLineNo">071</span> }<a name="line.71"></a>
<span class="sourceLineNo">072</span><a name="line.72"></a>
<span class="sourceLineNo">073</span> /**<a name="line.73"></a>
<span class="sourceLineNo">074</span> * Valid command line options.<a name="line.74"></a>
<span class="sourceLineNo">075</span> */<a name="line.75"></a>
<span class="sourceLineNo">076</span> private enum Operations {<a name="line.76"></a>
<span class="sourceLineNo">077</span> GETLEVEL,<a name="line.77"></a>
<span class="sourceLineNo">078</span> SETLEVEL,<a name="line.78"></a>
<span class="sourceLineNo">079</span> UNKNOWN<a name="line.79"></a>
<span class="sourceLineNo">080</span> }<a name="line.80"></a>
<span class="sourceLineNo">081</span><a name="line.81"></a>
<span class="sourceLineNo">082</span> private static void printUsage() {<a name="line.82"></a>
<span class="sourceLineNo">083</span> System.err.println(USAGES);<a name="line.83"></a>
<span class="sourceLineNo">084</span> System.exit(-1);<a name="line.84"></a>
<span class="sourceLineNo">085</span> }<a name="line.85"></a>
<span class="sourceLineNo">086</span><a name="line.86"></a>
<span class="sourceLineNo">087</span> public static boolean isValidProtocol(String protocol) {<a name="line.87"></a>
<span class="sourceLineNo">088</span> return protocol.equals(PROTOCOL_HTTP) || protocol.equals(PROTOCOL_HTTPS);<a name="line.88"></a>
<span class="sourceLineNo">089</span> }<a name="line.89"></a>
<span class="sourceLineNo">090</span><a name="line.90"></a>
<span class="sourceLineNo">091</span> static class CLI extends Configured implements Tool {<a name="line.91"></a>
<span class="sourceLineNo">092</span> private Operations operation = Operations.UNKNOWN;<a name="line.92"></a>
<span class="sourceLineNo">093</span> private String protocol;<a name="line.93"></a>
<span class="sourceLineNo">094</span> private String hostName;<a name="line.94"></a>
<span class="sourceLineNo">095</span> private String className;<a name="line.95"></a>
<span class="sourceLineNo">096</span> private String level;<a name="line.96"></a>
<span class="sourceLineNo">097</span><a name="line.97"></a>
<span class="sourceLineNo">098</span> CLI(Configuration conf) {<a name="line.98"></a>
<span class="sourceLineNo">099</span> setConf(conf);<a name="line.99"></a>
<span class="sourceLineNo">100</span> }<a name="line.100"></a>
<span class="sourceLineNo">101</span><a name="line.101"></a>
<span class="sourceLineNo">102</span> @Override<a name="line.102"></a>
<span class="sourceLineNo">103</span> public int run(String[] args) throws Exception {<a name="line.103"></a>
<span class="sourceLineNo">104</span> try {<a name="line.104"></a>
<span class="sourceLineNo">105</span> parseArguments(args);<a name="line.105"></a>
<span class="sourceLineNo">106</span> sendLogLevelRequest();<a name="line.106"></a>
<span class="sourceLineNo">107</span> } catch (HadoopIllegalArgumentException e) {<a name="line.107"></a>
<span class="sourceLineNo">108</span> printUsage();<a name="line.108"></a>
<span class="sourceLineNo">109</span> }<a name="line.109"></a>
<span class="sourceLineNo">110</span> return 0;<a name="line.110"></a>
<span class="sourceLineNo">111</span> }<a name="line.111"></a>
<span class="sourceLineNo">112</span><a name="line.112"></a>
<span class="sourceLineNo">113</span> /**<a name="line.113"></a>
<span class="sourceLineNo">114</span> * Send HTTP request to the daemon.<a name="line.114"></a>
<span class="sourceLineNo">115</span> * @throws HadoopIllegalArgumentException if arguments are invalid.<a name="line.115"></a>
<span class="sourceLineNo">116</span> * @throws Exception if unable to connect<a name="line.116"></a>
<span class="sourceLineNo">117</span> */<a name="line.117"></a>
<span class="sourceLineNo">118</span> private void sendLogLevelRequest() throws HadoopIllegalArgumentException, Exception {<a name="line.118"></a>
<span class="sourceLineNo">119</span> switch (operation) {<a name="line.119"></a>
<span class="sourceLineNo">120</span> case GETLEVEL:<a name="line.120"></a>
<span class="sourceLineNo">121</span> doGetLevel();<a name="line.121"></a>
<span class="sourceLineNo">122</span> break;<a name="line.122"></a>
<span class="sourceLineNo">123</span> case SETLEVEL:<a name="line.123"></a>
<span class="sourceLineNo">124</span> doSetLevel();<a name="line.124"></a>
<span class="sourceLineNo">125</span> break;<a name="line.125"></a>
<span class="sourceLineNo">126</span> default:<a name="line.126"></a>
<span class="sourceLineNo">127</span> throw new HadoopIllegalArgumentException("Expect either -getlevel or -setlevel");<a name="line.127"></a>
<span class="sourceLineNo">128</span> }<a name="line.128"></a>
<span class="sourceLineNo">129</span> }<a name="line.129"></a>
<span class="sourceLineNo">130</span><a name="line.130"></a>
<span class="sourceLineNo">131</span> public void parseArguments(String[] args) throws HadoopIllegalArgumentException {<a name="line.131"></a>
<span class="sourceLineNo">132</span> if (args.length == 0) {<a name="line.132"></a>
<span class="sourceLineNo">133</span> throw new HadoopIllegalArgumentException("No arguments specified");<a name="line.133"></a>
<span class="sourceLineNo">134</span> }<a name="line.134"></a>
<span class="sourceLineNo">135</span> int nextArgIndex = 0;<a name="line.135"></a>
<span class="sourceLineNo">136</span> while (nextArgIndex &lt; args.length) {<a name="line.136"></a>
<span class="sourceLineNo">137</span> switch (args[nextArgIndex]) {<a name="line.137"></a>
<span class="sourceLineNo">138</span> case "-getlevel":<a name="line.138"></a>
<span class="sourceLineNo">139</span> nextArgIndex = parseGetLevelArgs(args, nextArgIndex);<a name="line.139"></a>
<span class="sourceLineNo">140</span> break;<a name="line.140"></a>
<span class="sourceLineNo">141</span> case "-setlevel":<a name="line.141"></a>
<span class="sourceLineNo">142</span> nextArgIndex = parseSetLevelArgs(args, nextArgIndex);<a name="line.142"></a>
<span class="sourceLineNo">143</span> break;<a name="line.143"></a>
<span class="sourceLineNo">144</span> case "-protocol":<a name="line.144"></a>
<span class="sourceLineNo">145</span> nextArgIndex = parseProtocolArgs(args, nextArgIndex);<a name="line.145"></a>
<span class="sourceLineNo">146</span> break;<a name="line.146"></a>
<span class="sourceLineNo">147</span> default:<a name="line.147"></a>
<span class="sourceLineNo">148</span> throw new HadoopIllegalArgumentException("Unexpected argument " + args[nextArgIndex]);<a name="line.148"></a>
<span class="sourceLineNo">149</span> }<a name="line.149"></a>
<span class="sourceLineNo">150</span> }<a name="line.150"></a>
<span class="sourceLineNo">151</span><a name="line.151"></a>
<span class="sourceLineNo">152</span> // if operation is never specified in the arguments<a name="line.152"></a>
<span class="sourceLineNo">153</span> if (operation == Operations.UNKNOWN) {<a name="line.153"></a>
<span class="sourceLineNo">154</span> throw new HadoopIllegalArgumentException("Must specify either -getlevel or -setlevel");<a name="line.154"></a>
<span class="sourceLineNo">155</span> }<a name="line.155"></a>
<span class="sourceLineNo">156</span><a name="line.156"></a>
<span class="sourceLineNo">157</span> // if protocol is unspecified, set it as http.<a name="line.157"></a>
<span class="sourceLineNo">158</span> if (protocol == null) {<a name="line.158"></a>
<span class="sourceLineNo">159</span> protocol = PROTOCOL_HTTP;<a name="line.159"></a>
<span class="sourceLineNo">160</span> }<a name="line.160"></a>
<span class="sourceLineNo">161</span> }<a name="line.161"></a>
<span class="sourceLineNo">162</span><a name="line.162"></a>
<span class="sourceLineNo">163</span> private int parseGetLevelArgs(String[] args, int index) throws HadoopIllegalArgumentException {<a name="line.163"></a>
<span class="sourceLineNo">164</span> // fail if multiple operations are specified in the arguments<a name="line.164"></a>
<span class="sourceLineNo">165</span> if (operation != Operations.UNKNOWN) {<a name="line.165"></a>
<span class="sourceLineNo">166</span> throw new HadoopIllegalArgumentException("Redundant -getlevel command");<a name="line.166"></a>
<span class="sourceLineNo">167</span> }<a name="line.167"></a>
<span class="sourceLineNo">168</span> // check number of arguments is sufficient<a name="line.168"></a>
<span class="sourceLineNo">169</span> if (index + 2 &gt;= args.length) {<a name="line.169"></a>
<span class="sourceLineNo">170</span> throw new HadoopIllegalArgumentException("-getlevel needs two parameters");<a name="line.170"></a>
<span class="sourceLineNo">171</span> }<a name="line.171"></a>
<span class="sourceLineNo">172</span> operation = Operations.GETLEVEL;<a name="line.172"></a>
<span class="sourceLineNo">173</span> hostName = args[index + 1];<a name="line.173"></a>
<span class="sourceLineNo">174</span> className = args[index + 2];<a name="line.174"></a>
<span class="sourceLineNo">175</span> return index + 3;<a name="line.175"></a>
<span class="sourceLineNo">176</span> }<a name="line.176"></a>
<span class="sourceLineNo">177</span><a name="line.177"></a>
<span class="sourceLineNo">178</span> private int parseSetLevelArgs(String[] args, int index) throws HadoopIllegalArgumentException {<a name="line.178"></a>
<span class="sourceLineNo">179</span> // fail if multiple operations are specified in the arguments<a name="line.179"></a>
<span class="sourceLineNo">180</span> if (operation != Operations.UNKNOWN) {<a name="line.180"></a>
<span class="sourceLineNo">181</span> throw new HadoopIllegalArgumentException("Redundant -setlevel command");<a name="line.181"></a>
<span class="sourceLineNo">182</span> }<a name="line.182"></a>
<span class="sourceLineNo">183</span> // check number of arguments is sufficient<a name="line.183"></a>
<span class="sourceLineNo">184</span> if (index + 3 &gt;= args.length) {<a name="line.184"></a>
<span class="sourceLineNo">185</span> throw new HadoopIllegalArgumentException("-setlevel needs three parameters");<a name="line.185"></a>
<span class="sourceLineNo">186</span> }<a name="line.186"></a>
<span class="sourceLineNo">187</span> operation = Operations.SETLEVEL;<a name="line.187"></a>
<span class="sourceLineNo">188</span> hostName = args[index + 1];<a name="line.188"></a>
<span class="sourceLineNo">189</span> className = args[index + 2];<a name="line.189"></a>
<span class="sourceLineNo">190</span> level = args[index + 3];<a name="line.190"></a>
<span class="sourceLineNo">191</span> return index + 4;<a name="line.191"></a>
<span class="sourceLineNo">192</span> }<a name="line.192"></a>
<span class="sourceLineNo">193</span><a name="line.193"></a>
<span class="sourceLineNo">194</span> private int parseProtocolArgs(String[] args, int index) throws HadoopIllegalArgumentException {<a name="line.194"></a>
<span class="sourceLineNo">195</span> // make sure only -protocol is specified<a name="line.195"></a>
<span class="sourceLineNo">196</span> if (protocol != null) {<a name="line.196"></a>
<span class="sourceLineNo">197</span> throw new HadoopIllegalArgumentException("Redundant -protocol command");<a name="line.197"></a>
<span class="sourceLineNo">198</span> }<a name="line.198"></a>
<span class="sourceLineNo">199</span> // check number of arguments is sufficient<a name="line.199"></a>
<span class="sourceLineNo">200</span> if (index + 1 &gt;= args.length) {<a name="line.200"></a>
<span class="sourceLineNo">201</span> throw new HadoopIllegalArgumentException("-protocol needs one parameter");<a name="line.201"></a>
<span class="sourceLineNo">202</span> }<a name="line.202"></a>
<span class="sourceLineNo">203</span> // check protocol is valid<a name="line.203"></a>
<span class="sourceLineNo">204</span> protocol = args[index + 1];<a name="line.204"></a>
<span class="sourceLineNo">205</span> if (!isValidProtocol(protocol)) {<a name="line.205"></a>
<span class="sourceLineNo">206</span> throw new HadoopIllegalArgumentException("Invalid protocol: " + protocol);<a name="line.206"></a>
<span class="sourceLineNo">207</span> }<a name="line.207"></a>
<span class="sourceLineNo">208</span> return index + 2;<a name="line.208"></a>
<span class="sourceLineNo">209</span> }<a name="line.209"></a>
<span class="sourceLineNo">210</span><a name="line.210"></a>
<span class="sourceLineNo">211</span> /**<a name="line.211"></a>
<span class="sourceLineNo">212</span> * Send HTTP request to get log level.<a name="line.212"></a>
<span class="sourceLineNo">213</span> * @throws HadoopIllegalArgumentException if arguments are invalid.<a name="line.213"></a>
<span class="sourceLineNo">214</span> * @throws Exception if unable to connect<a name="line.214"></a>
<span class="sourceLineNo">215</span> */<a name="line.215"></a>
<span class="sourceLineNo">216</span> private void doGetLevel() throws Exception {<a name="line.216"></a>
<span class="sourceLineNo">217</span> process(protocol + "://" + hostName + "/logLevel?log=" + className);<a name="line.217"></a>
<span class="sourceLineNo">218</span> }<a name="line.218"></a>
<span class="sourceLineNo">219</span><a name="line.219"></a>
<span class="sourceLineNo">220</span> /**<a name="line.220"></a>
<span class="sourceLineNo">221</span> * Send HTTP request to set log level.<a name="line.221"></a>
<span class="sourceLineNo">222</span> * @throws HadoopIllegalArgumentException if arguments are invalid.<a name="line.222"></a>
<span class="sourceLineNo">223</span> * @throws Exception if unable to connect<a name="line.223"></a>
<span class="sourceLineNo">224</span> */<a name="line.224"></a>
<span class="sourceLineNo">225</span> private void doSetLevel() throws Exception {<a name="line.225"></a>
<span class="sourceLineNo">226</span> process(protocol + "://" + hostName + "/logLevel?log=" + className + "&amp;level=" + level);<a name="line.226"></a>
<span class="sourceLineNo">227</span> }<a name="line.227"></a>
<span class="sourceLineNo">228</span><a name="line.228"></a>
<span class="sourceLineNo">229</span> /**<a name="line.229"></a>
<span class="sourceLineNo">230</span> * Connect to the URL. Supports HTTP and supports SPNEGO authentication. It falls back to simple<a name="line.230"></a>
<span class="sourceLineNo">231</span> * authentication if it fails to initiate SPNEGO.<a name="line.231"></a>
<span class="sourceLineNo">232</span> * @param url the URL address of the daemon servlet<a name="line.232"></a>
<span class="sourceLineNo">233</span> * @return a connected connection<a name="line.233"></a>
<span class="sourceLineNo">234</span> * @throws Exception if it can not establish a connection.<a name="line.234"></a>
<span class="sourceLineNo">235</span> */<a name="line.235"></a>
<span class="sourceLineNo">236</span> private HttpURLConnection connect(URL url) throws Exception {<a name="line.236"></a>
<span class="sourceLineNo">237</span> AuthenticatedURL.Token token = new AuthenticatedURL.Token();<a name="line.237"></a>
<span class="sourceLineNo">238</span> AuthenticatedURL aUrl;<a name="line.238"></a>
<span class="sourceLineNo">239</span> SSLFactory clientSslFactory;<a name="line.239"></a>
<span class="sourceLineNo">240</span> HttpURLConnection connection;<a name="line.240"></a>
<span class="sourceLineNo">241</span> // If https is chosen, configures SSL client.<a name="line.241"></a>
<span class="sourceLineNo">242</span> if (PROTOCOL_HTTPS.equals(url.getProtocol())) {<a name="line.242"></a>
<span class="sourceLineNo">243</span> clientSslFactory = new SSLFactory(SSLFactory.Mode.CLIENT, this.getConf());<a name="line.243"></a>
<span class="sourceLineNo">244</span> clientSslFactory.init();<a name="line.244"></a>
<span class="sourceLineNo">245</span> SSLSocketFactory sslSocketF = clientSslFactory.createSSLSocketFactory();<a name="line.245"></a>
<span class="sourceLineNo">246</span><a name="line.246"></a>
<span class="sourceLineNo">247</span> aUrl = new AuthenticatedURL(new KerberosAuthenticator(), clientSslFactory);<a name="line.247"></a>
<span class="sourceLineNo">248</span> connection = aUrl.openConnection(url, token);<a name="line.248"></a>
<span class="sourceLineNo">249</span> HttpsURLConnection httpsConn = (HttpsURLConnection) connection;<a name="line.249"></a>
<span class="sourceLineNo">250</span> httpsConn.setSSLSocketFactory(sslSocketF);<a name="line.250"></a>
<span class="sourceLineNo">251</span> } else {<a name="line.251"></a>
<span class="sourceLineNo">252</span> aUrl = new AuthenticatedURL(new KerberosAuthenticator());<a name="line.252"></a>
<span class="sourceLineNo">253</span> connection = aUrl.openConnection(url, token);<a name="line.253"></a>
<span class="sourceLineNo">254</span> }<a name="line.254"></a>
<span class="sourceLineNo">255</span> connection.connect();<a name="line.255"></a>
<span class="sourceLineNo">256</span> return connection;<a name="line.256"></a>
<span class="sourceLineNo">257</span> }<a name="line.257"></a>
<span class="sourceLineNo">258</span><a name="line.258"></a>
<span class="sourceLineNo">259</span> /**<a name="line.259"></a>
<span class="sourceLineNo">260</span> * Configures the client to send HTTP request to the URL. Supports SPENGO for authentication.<a name="line.260"></a>
<span class="sourceLineNo">261</span> * @param urlString URL and query string to the daemon's web UI<a name="line.261"></a>
<span class="sourceLineNo">262</span> * @throws Exception if unable to connect<a name="line.262"></a>
<span class="sourceLineNo">263</span> */<a name="line.263"></a>
<span class="sourceLineNo">264</span> private void process(String urlString) throws Exception {<a name="line.264"></a>
<span class="sourceLineNo">265</span> URL url = new URL(urlString);<a name="line.265"></a>
<span class="sourceLineNo">266</span> System.out.println("Connecting to " + url);<a name="line.266"></a>
<span class="sourceLineNo">267</span><a name="line.267"></a>
<span class="sourceLineNo">268</span> HttpURLConnection connection = connect(url);<a name="line.268"></a>
<span class="sourceLineNo">269</span><a name="line.269"></a>
<span class="sourceLineNo">270</span> HttpExceptionUtils.validateResponse(connection, 200);<a name="line.270"></a>
<span class="sourceLineNo">271</span><a name="line.271"></a>
<span class="sourceLineNo">272</span> // read from the servlet<a name="line.272"></a>
<span class="sourceLineNo">273</span><a name="line.273"></a>
<span class="sourceLineNo">274</span> try (<a name="line.274"></a>
<span class="sourceLineNo">275</span> InputStreamReader streamReader =<a name="line.275"></a>
<span class="sourceLineNo">276</span> new InputStreamReader(connection.getInputStream(), StandardCharsets.UTF_8);<a name="line.276"></a>
<span class="sourceLineNo">277</span> BufferedReader bufferedReader = new BufferedReader(streamReader)) {<a name="line.277"></a>
<span class="sourceLineNo">278</span> bufferedReader.lines().filter(Objects::nonNull).filter(line -&gt; line.startsWith(MARKER))<a name="line.278"></a>
<span class="sourceLineNo">279</span> .forEach(line -&gt; System.out.println(TAG.matcher(line).replaceAll("")));<a name="line.279"></a>
<span class="sourceLineNo">280</span> } catch (IOException ioe) {<a name="line.280"></a>
<span class="sourceLineNo">281</span> System.err.println("" + ioe);<a name="line.281"></a>
<span class="sourceLineNo">282</span> }<a name="line.282"></a>
<span class="sourceLineNo">283</span> }<a name="line.283"></a>
<span class="sourceLineNo">284</span> }<a name="line.284"></a>
<span class="sourceLineNo">285</span><a name="line.285"></a>
<span class="sourceLineNo">286</span> private static final String MARKER = "&lt;!-- OUTPUT --&gt;";<a name="line.286"></a>
<span class="sourceLineNo">287</span> private static final Pattern TAG = Pattern.compile("&lt;[^&gt;]*&gt;");<a name="line.287"></a>
<span class="sourceLineNo">288</span><a name="line.288"></a>
<span class="sourceLineNo">289</span> /**<a name="line.289"></a>
<span class="sourceLineNo">290</span> * A servlet implementation<a name="line.290"></a>
<span class="sourceLineNo">291</span> */<a name="line.291"></a>
<span class="sourceLineNo">292</span> @InterfaceAudience.Private<a name="line.292"></a>
<span class="sourceLineNo">293</span> public static class Servlet extends HttpServlet {<a name="line.293"></a>
<span class="sourceLineNo">294</span> private static final long serialVersionUID = 1L;<a name="line.294"></a>
<span class="sourceLineNo">295</span><a name="line.295"></a>
<span class="sourceLineNo">296</span> @Override<a name="line.296"></a>
<span class="sourceLineNo">297</span> public void doGet(HttpServletRequest request, HttpServletResponse response)<a name="line.297"></a>
<span class="sourceLineNo">298</span> throws ServletException, IOException {<a name="line.298"></a>
<span class="sourceLineNo">299</span> // Do the authorization<a name="line.299"></a>
<span class="sourceLineNo">300</span> if (!HttpServer.hasAdministratorAccess(getServletContext(), request, response)) {<a name="line.300"></a>
<span class="sourceLineNo">301</span> return;<a name="line.301"></a>
<span class="sourceLineNo">302</span> }<a name="line.302"></a>
<span class="sourceLineNo">303</span> // Disallow modification of the LogLevel if explicitly set to readonly<a name="line.303"></a>
<span class="sourceLineNo">304</span> Configuration conf =<a name="line.304"></a>
<span class="sourceLineNo">305</span> (Configuration) getServletContext().getAttribute(HttpServer.CONF_CONTEXT_ATTRIBUTE);<a name="line.305"></a>
<span class="sourceLineNo">306</span> if (conf.getBoolean("hbase.master.ui.readonly", false)) {<a name="line.306"></a>
<span class="sourceLineNo">307</span> sendError(response, HttpServletResponse.SC_FORBIDDEN,<a name="line.307"></a>
<span class="sourceLineNo">308</span> "Modification of HBase via the UI is disallowed in configuration.");<a name="line.308"></a>
<span class="sourceLineNo">309</span> return;<a name="line.309"></a>
<span class="sourceLineNo">310</span> }<a name="line.310"></a>
<span class="sourceLineNo">311</span> response.setContentType("text/html");<a name="line.311"></a>
<span class="sourceLineNo">312</span> PrintWriter out;<a name="line.312"></a>
<span class="sourceLineNo">313</span> try {<a name="line.313"></a>
<span class="sourceLineNo">314</span> String headerPath = "header.jsp?pageTitle=Log Level";<a name="line.314"></a>
<span class="sourceLineNo">315</span> request.getRequestDispatcher(headerPath).include(request, response);<a name="line.315"></a>
<span class="sourceLineNo">316</span> out = response.getWriter();<a name="line.316"></a>
<span class="sourceLineNo">317</span> } catch (FileNotFoundException e) {<a name="line.317"></a>
<span class="sourceLineNo">318</span> // in case file is not found fall back to old design<a name="line.318"></a>
<span class="sourceLineNo">319</span> out = ServletUtil.initHTML(response, "Log Level");<a name="line.319"></a>
<span class="sourceLineNo">320</span> }<a name="line.320"></a>
<span class="sourceLineNo">321</span> out.println(FORMS);<a name="line.321"></a>
<span class="sourceLineNo">322</span><a name="line.322"></a>
<span class="sourceLineNo">323</span> String logName = ServletUtil.getParameter(request, "log");<a name="line.323"></a>
<span class="sourceLineNo">324</span> String level = ServletUtil.getParameter(request, "level");<a name="line.324"></a>
<span class="sourceLineNo">325</span><a name="line.325"></a>
<span class="sourceLineNo">326</span> String[] readOnlyLogLevels = conf.getStrings(READONLY_LOGGERS_CONF_KEY);<a name="line.326"></a>
<span class="sourceLineNo">327</span><a name="line.327"></a>
<span class="sourceLineNo">328</span> if (logName != null) {<a name="line.328"></a>
<span class="sourceLineNo">329</span> out.println("&lt;p&gt;Results:&lt;/p&gt;");<a name="line.329"></a>
<span class="sourceLineNo">330</span> out.println(MARKER + "Submitted Log Name: &lt;b&gt;" + logName + "&lt;/b&gt;&lt;br /&gt;");<a name="line.330"></a>
<span class="sourceLineNo">331</span><a name="line.331"></a>
<span class="sourceLineNo">332</span> Logger log = LoggerFactory.getLogger(logName);<a name="line.332"></a>
<span class="sourceLineNo">333</span> out.println(MARKER + "Log Class: &lt;b&gt;" + log.getClass().getName() + "&lt;/b&gt;&lt;br /&gt;");<a name="line.333"></a>
<span class="sourceLineNo">334</span> if (level != null) {<a name="line.334"></a>
<span class="sourceLineNo">335</span> if (!isLogLevelChangeAllowed(logName, readOnlyLogLevels)) {<a name="line.335"></a>
<span class="sourceLineNo">336</span> sendError(response, HttpServletResponse.SC_PRECONDITION_FAILED,<a name="line.336"></a>
<span class="sourceLineNo">337</span> "Modification of logger " + logName + " is disallowed in configuration.");<a name="line.337"></a>
<span class="sourceLineNo">338</span> return;<a name="line.338"></a>
<span class="sourceLineNo">339</span> }<a name="line.339"></a>
<span class="sourceLineNo">340</span><a name="line.340"></a>
<span class="sourceLineNo">341</span> out.println(MARKER + "Submitted Level: &lt;b&gt;" + level + "&lt;/b&gt;&lt;br /&gt;");<a name="line.341"></a>
<span class="sourceLineNo">342</span> }<a name="line.342"></a>
<span class="sourceLineNo">343</span> process(log, level, out);<a name="line.343"></a>
<span class="sourceLineNo">344</span> }<a name="line.344"></a>
<span class="sourceLineNo">345</span><a name="line.345"></a>
<span class="sourceLineNo">346</span> try {<a name="line.346"></a>
<span class="sourceLineNo">347</span> String footerPath = "footer.jsp";<a name="line.347"></a>
<span class="sourceLineNo">348</span> out.println("&lt;/div&gt;");<a name="line.348"></a>
<span class="sourceLineNo">349</span> request.getRequestDispatcher(footerPath).include(request, response);<a name="line.349"></a>
<span class="sourceLineNo">350</span> } catch (FileNotFoundException e) {<a name="line.350"></a>
<span class="sourceLineNo">351</span> out.println(ServletUtil.HTML_TAIL);<a name="line.351"></a>
<span class="sourceLineNo">352</span> }<a name="line.352"></a>
<span class="sourceLineNo">353</span> out.close();<a name="line.353"></a>
<span class="sourceLineNo">354</span> }<a name="line.354"></a>
<span class="sourceLineNo">355</span><a name="line.355"></a>
<span class="sourceLineNo">356</span> private boolean isLogLevelChangeAllowed(String logger, String[] readOnlyLogLevels) {<a name="line.356"></a>
<span class="sourceLineNo">357</span> if (readOnlyLogLevels == null) {<a name="line.357"></a>
<span class="sourceLineNo">358</span> return true;<a name="line.358"></a>
<span class="sourceLineNo">359</span> }<a name="line.359"></a>
<span class="sourceLineNo">360</span> for (String readOnlyLogLevel : readOnlyLogLevels) {<a name="line.360"></a>
<span class="sourceLineNo">361</span> if (logger.startsWith(readOnlyLogLevel)) {<a name="line.361"></a>
<span class="sourceLineNo">362</span> return false;<a name="line.362"></a>
<span class="sourceLineNo">363</span> }<a name="line.363"></a>
<span class="sourceLineNo">364</span> }<a name="line.364"></a>
<span class="sourceLineNo">365</span> return true;<a name="line.365"></a>
<span class="sourceLineNo">366</span> }<a name="line.366"></a>
<span class="sourceLineNo">367</span><a name="line.367"></a>
<span class="sourceLineNo">368</span> private void sendError(HttpServletResponse response, int code, String message)<a name="line.368"></a>
<span class="sourceLineNo">369</span> throws IOException {<a name="line.369"></a>
<span class="sourceLineNo">370</span> response.setStatus(code, message);<a name="line.370"></a>
<span class="sourceLineNo">371</span> response.sendError(code, message);<a name="line.371"></a>
<span class="sourceLineNo">372</span> }<a name="line.372"></a>
<span class="sourceLineNo">373</span><a name="line.373"></a>
<span class="sourceLineNo">374</span> static final String FORMS = "&lt;div class='container-fluid content'&gt;\n"<a name="line.374"></a>
<span class="sourceLineNo">375</span> + "&lt;div class='row inner_header top_header'&gt;\n" + "&lt;div class='page-header'&gt;\n"<a name="line.375"></a>
<span class="sourceLineNo">376</span> + "&lt;h1&gt;Get/Set Log Level&lt;/h1&gt;\n" + "&lt;/div&gt;\n" + "&lt;/div&gt;\n" + "Actions:" + "&lt;p&gt;" + "&lt;center&gt;\n"<a name="line.376"></a>
<span class="sourceLineNo">377</span> + "&lt;table class='table' style='border: 0;' width='95%' &gt;\n" + "&lt;tr&gt;\n" + "&lt;form&gt;\n"<a name="line.377"></a>
<span class="sourceLineNo">378</span> + "&lt;td class='centered'&gt;\n"<a name="line.378"></a>
<span class="sourceLineNo">379</span> + "&lt;input style='font-size: 12pt; width: 10em' type='submit' value='Get Log Level'"<a name="line.379"></a>
<span class="sourceLineNo">380</span> + " class='btn' /&gt;\n" + "&lt;/td&gt;\n" + "&lt;td style='text-align: center;'&gt;\n"<a name="line.380"></a>
<span class="sourceLineNo">381</span> + "&lt;input type='text' name='log' size='50' required='required'"<a name="line.381"></a>
<span class="sourceLineNo">382</span> + " placeholder='Log Name (required)' /&gt;\n" + "&lt;/td&gt;\n" + "&lt;td width=\"40%\"&gt;"<a name="line.382"></a>
<span class="sourceLineNo">383</span> + "Get the current log level for the specified log name." + "&lt;/td&gt;\n" + "&lt;/form&gt;\n"<a name="line.383"></a>
<span class="sourceLineNo">384</span> + "&lt;/tr&gt;\n" + "&lt;tr&gt;\n" + "&lt;form&gt;\n" + "&lt;td class='centered'&gt;\n"<a name="line.384"></a>
<span class="sourceLineNo">385</span> + "&lt;input style='font-size: 12pt; width: 10em' type='submit'"<a name="line.385"></a>
<span class="sourceLineNo">386</span> + " value='Set Log Level' class='btn' /&gt;\n" + "&lt;/td&gt;\n" + "&lt;td style='text-align: center;'&gt;\n"<a name="line.386"></a>
<span class="sourceLineNo">387</span> + "&lt;input type='text' name='log' size='50' required='required'"<a name="line.387"></a>
<span class="sourceLineNo">388</span> + " placeholder='Log Name (required)' /&gt;\n"<a name="line.388"></a>
<span class="sourceLineNo">389</span> + "&lt;input type='text' name='level' size='50' required='required'"<a name="line.389"></a>
<span class="sourceLineNo">390</span> + " placeholder='Log Level (required)' /&gt;\n" + "&lt;/td&gt;\n" + "&lt;td width=\"40%\" style=\"\"&gt;"<a name="line.390"></a>
<span class="sourceLineNo">391</span> + "Set the specified log level for the specified log name." + "&lt;/td&gt;\n" + "&lt;/form&gt;\n"<a name="line.391"></a>
<span class="sourceLineNo">392</span> + "&lt;/tr&gt;\n" + "&lt;/table&gt;\n" + "&lt;/center&gt;\n" + "&lt;/p&gt;\n" + "&lt;hr/&gt;\n";<a name="line.392"></a>
<span class="sourceLineNo">393</span><a name="line.393"></a>
<span class="sourceLineNo">394</span> private static void process(Logger logger, String levelName, PrintWriter out) {<a name="line.394"></a>
<span class="sourceLineNo">395</span> if (levelName != null) {<a name="line.395"></a>
<span class="sourceLineNo">396</span> try {<a name="line.396"></a>
<span class="sourceLineNo">397</span> Log4jUtils.setLogLevel(logger.getName(), levelName);<a name="line.397"></a>
<span class="sourceLineNo">398</span> out.println(MARKER + "&lt;div class='text-success'&gt;" + "Setting Level to &lt;strong&gt;"<a name="line.398"></a>
<span class="sourceLineNo">399</span> + levelName + "&lt;/strong&gt; ...&lt;br /&gt;" + "&lt;/div&gt;");<a name="line.399"></a>
<span class="sourceLineNo">400</span> } catch (IllegalArgumentException e) {<a name="line.400"></a>
<span class="sourceLineNo">401</span> out.println(MARKER + "&lt;div class='text-danger'&gt;" + "Bad level : &lt;strong&gt;" + levelName<a name="line.401"></a>
<span class="sourceLineNo">402</span> + "&lt;/strong&gt;&lt;br /&gt;" + "&lt;/div&gt;");<a name="line.402"></a>
<span class="sourceLineNo">403</span> }<a name="line.403"></a>
<span class="sourceLineNo">404</span> }<a name="line.404"></a>
<span class="sourceLineNo">405</span> out.println(MARKER + "Effective level: &lt;b&gt;" + Log4jUtils.getEffectiveLevel(logger.getName())<a name="line.405"></a>
<span class="sourceLineNo">406</span> + "&lt;/b&gt;&lt;br /&gt;");<a name="line.406"></a>
<span class="sourceLineNo">407</span> }<a name="line.407"></a>
<span class="sourceLineNo">408</span> }<a name="line.408"></a>
<span class="sourceLineNo">409</span><a name="line.409"></a>
<span class="sourceLineNo">410</span> private LogLevel() {<a name="line.410"></a>
<span class="sourceLineNo">411</span> }<a name="line.411"></a>
<span class="sourceLineNo">412</span>}<a name="line.412"></a>
</pre>
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