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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,<a name="line.12"></a> |
| <span class="sourceLineNo">013</span> * software distributed under the License is distributed on an<a name="line.13"></a> |
| <span class="sourceLineNo">014</span> * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY<a name="line.14"></a> |
| <span class="sourceLineNo">015</span> * KIND, either express or implied. See the License for the<a name="line.15"></a> |
| <span class="sourceLineNo">016</span> * specific language governing permissions and limitations<a name="line.16"></a> |
| <span class="sourceLineNo">017</span> * under the License.<a name="line.17"></a> |
| <span class="sourceLineNo">018</span> *<a name="line.18"></a> |
| <span class="sourceLineNo">019</span> */<a name="line.19"></a> |
| <span class="sourceLineNo">020</span>package org.apache.mina.filter.buffer;<a name="line.20"></a> |
| <span class="sourceLineNo">021</span><a name="line.21"></a> |
| <span class="sourceLineNo">022</span>import java.io.BufferedOutputStream;<a name="line.22"></a> |
| <span class="sourceLineNo">023</span>import java.util.concurrent.ConcurrentHashMap;<a name="line.23"></a> |
| <span class="sourceLineNo">024</span><a name="line.24"></a> |
| <span class="sourceLineNo">025</span>import org.apache.mina.core.buffer.IoBuffer;<a name="line.25"></a> |
| <span class="sourceLineNo">026</span>import org.apache.mina.core.filterchain.IoFilter;<a name="line.26"></a> |
| <span class="sourceLineNo">027</span>import org.apache.mina.core.filterchain.IoFilterAdapter;<a name="line.27"></a> |
| <span class="sourceLineNo">028</span>import org.apache.mina.core.session.IoSession;<a name="line.28"></a> |
| <span class="sourceLineNo">029</span>import org.apache.mina.core.write.DefaultWriteRequest;<a name="line.29"></a> |
| <span class="sourceLineNo">030</span>import org.apache.mina.core.write.WriteRequest;<a name="line.30"></a> |
| <span class="sourceLineNo">031</span>import org.apache.mina.filter.codec.ProtocolCodecFilter;<a name="line.31"></a> |
| <span class="sourceLineNo">032</span>import org.apache.mina.util.LazyInitializedCacheMap;<a name="line.32"></a> |
| <span class="sourceLineNo">033</span>import org.slf4j.Logger;<a name="line.33"></a> |
| <span class="sourceLineNo">034</span>import org.slf4j.LoggerFactory;<a name="line.34"></a> |
| <span class="sourceLineNo">035</span><a name="line.35"></a> |
| <span class="sourceLineNo">036</span>/**<a name="line.36"></a> |
| <span class="sourceLineNo">037</span> * An {@link IoFilter} implementation used to buffer outgoing {@link WriteRequest} almost<a name="line.37"></a> |
| <span class="sourceLineNo">038</span> * like what {@link BufferedOutputStream} does. Using this filter allows to be less dependent<a name="line.38"></a> |
| <span class="sourceLineNo">039</span> * from network latency. It is also useful when a session is generating very small messages<a name="line.39"></a> |
| <span class="sourceLineNo">040</span> * too frequently and consequently generating unnecessary traffic overhead.<a name="line.40"></a> |
| <span class="sourceLineNo">041</span> * <a name="line.41"></a> |
| <span class="sourceLineNo">042</span> * Please note that it should always be placed before the {@link ProtocolCodecFilter}<a name="line.42"></a> |
| <span class="sourceLineNo">043</span> * as it only handles {@link WriteRequest}'s carrying {@link IoBuffer} objects.<a name="line.43"></a> |
| <span class="sourceLineNo">044</span> * <a name="line.44"></a> |
| <span class="sourceLineNo">045</span> * @author <a href="http://mina.apache.org">Apache MINA Project</a><a name="line.45"></a> |
| <span class="sourceLineNo">046</span> * @since MINA 2.0.0-M2<a name="line.46"></a> |
| <span class="sourceLineNo">047</span> * @org.apache.xbean.XBean<a name="line.47"></a> |
| <span class="sourceLineNo">048</span> */<a name="line.48"></a> |
| <span class="sourceLineNo">049</span>public final class BufferedWriteFilter extends IoFilterAdapter {<a name="line.49"></a> |
| <span class="sourceLineNo">050</span> private final Logger logger = LoggerFactory.getLogger(BufferedWriteFilter.class);<a name="line.50"></a> |
| <span class="sourceLineNo">051</span><a name="line.51"></a> |
| <span class="sourceLineNo">052</span> /**<a name="line.52"></a> |
| <span class="sourceLineNo">053</span> * Default buffer size value in bytes.<a name="line.53"></a> |
| <span class="sourceLineNo">054</span> */<a name="line.54"></a> |
| <span class="sourceLineNo">055</span> public final static int DEFAULT_BUFFER_SIZE = 8192;<a name="line.55"></a> |
| <span class="sourceLineNo">056</span><a name="line.56"></a> |
| <span class="sourceLineNo">057</span> /**<a name="line.57"></a> |
| <span class="sourceLineNo">058</span> * The buffer size allocated for each new session's buffer.<a name="line.58"></a> |
| <span class="sourceLineNo">059</span> */<a name="line.59"></a> |
| <span class="sourceLineNo">060</span> private int bufferSize = DEFAULT_BUFFER_SIZE;<a name="line.60"></a> |
| <span class="sourceLineNo">061</span><a name="line.61"></a> |
| <span class="sourceLineNo">062</span> /**<a name="line.62"></a> |
| <span class="sourceLineNo">063</span> * The map that matches an {@link IoSession} and it's {@link IoBuffer}<a name="line.63"></a> |
| <span class="sourceLineNo">064</span> * buffer.<a name="line.64"></a> |
| <span class="sourceLineNo">065</span> */<a name="line.65"></a> |
| <span class="sourceLineNo">066</span> private final LazyInitializedCacheMap<IoSession, IoBuffer> buffersMap;<a name="line.66"></a> |
| <span class="sourceLineNo">067</span><a name="line.67"></a> |
| <span class="sourceLineNo">068</span> /**<a name="line.68"></a> |
| <span class="sourceLineNo">069</span> * Default constructor. Sets buffer size to {@link #DEFAULT_BUFFER_SIZE}<a name="line.69"></a> |
| <span class="sourceLineNo">070</span> * bytes. Uses a default instance of {@link ConcurrentHashMap}.<a name="line.70"></a> |
| <span class="sourceLineNo">071</span> */<a name="line.71"></a> |
| <span class="sourceLineNo">072</span> public BufferedWriteFilter() {<a name="line.72"></a> |
| <span class="sourceLineNo">073</span> this(DEFAULT_BUFFER_SIZE, null);<a name="line.73"></a> |
| <span class="sourceLineNo">074</span> }<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> |
| <span class="sourceLineNo">077</span> * Constructor which sets buffer size to <code>bufferSize</code>.Uses a default<a name="line.77"></a> |
| <span class="sourceLineNo">078</span> * instance of {@link ConcurrentHashMap}.<a name="line.78"></a> |
| <span class="sourceLineNo">079</span> * <a name="line.79"></a> |
| <span class="sourceLineNo">080</span> * @param bufferSize the new buffer size<a name="line.80"></a> |
| <span class="sourceLineNo">081</span> */<a name="line.81"></a> |
| <span class="sourceLineNo">082</span> public BufferedWriteFilter(int bufferSize) {<a name="line.82"></a> |
| <span class="sourceLineNo">083</span> this(bufferSize, null);<a name="line.83"></a> |
| <span class="sourceLineNo">084</span> }<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> * Constructor which sets buffer size to <code>bufferSize</code>. If<a name="line.87"></a> |
| <span class="sourceLineNo">088</span> * <code>buffersMap</code> is null then a default instance of {@link ConcurrentHashMap}<a name="line.88"></a> |
| <span class="sourceLineNo">089</span> * is created else the provided instance is used.<a name="line.89"></a> |
| <span class="sourceLineNo">090</span> * <a name="line.90"></a> |
| <span class="sourceLineNo">091</span> * @param bufferSize the new buffer size<a name="line.91"></a> |
| <span class="sourceLineNo">092</span> * @param buffersMap the map to use for storing each session buffer<a name="line.92"></a> |
| <span class="sourceLineNo">093</span> */<a name="line.93"></a> |
| <span class="sourceLineNo">094</span> public BufferedWriteFilter(int bufferSize, LazyInitializedCacheMap<IoSession, IoBuffer> buffersMap) {<a name="line.94"></a> |
| <span class="sourceLineNo">095</span> super();<a name="line.95"></a> |
| <span class="sourceLineNo">096</span> this.bufferSize = bufferSize;<a name="line.96"></a> |
| <span class="sourceLineNo">097</span> if (buffersMap == null) {<a name="line.97"></a> |
| <span class="sourceLineNo">098</span> this.buffersMap = new LazyInitializedCacheMap<IoSession, IoBuffer>();<a name="line.98"></a> |
| <span class="sourceLineNo">099</span> } else {<a name="line.99"></a> |
| <span class="sourceLineNo">100</span> this.buffersMap = buffersMap;<a name="line.100"></a> |
| <span class="sourceLineNo">101</span> }<a name="line.101"></a> |
| <span class="sourceLineNo">102</span> }<a name="line.102"></a> |
| <span class="sourceLineNo">103</span><a name="line.103"></a> |
| <span class="sourceLineNo">104</span> /**<a name="line.104"></a> |
| <span class="sourceLineNo">105</span> * Returns buffer size.<a name="line.105"></a> |
| <span class="sourceLineNo">106</span> */<a name="line.106"></a> |
| <span class="sourceLineNo">107</span> public int getBufferSize() {<a name="line.107"></a> |
| <span class="sourceLineNo">108</span> return bufferSize;<a name="line.108"></a> |
| <span class="sourceLineNo">109</span> }<a name="line.109"></a> |
| <span class="sourceLineNo">110</span><a name="line.110"></a> |
| <span class="sourceLineNo">111</span> /**<a name="line.111"></a> |
| <span class="sourceLineNo">112</span> * Sets the buffer size but only for the newly created buffers.<a name="line.112"></a> |
| <span class="sourceLineNo">113</span> * <a name="line.113"></a> |
| <span class="sourceLineNo">114</span> * @param bufferSize the new buffer size<a name="line.114"></a> |
| <span class="sourceLineNo">115</span> */<a name="line.115"></a> |
| <span class="sourceLineNo">116</span> public void setBufferSize(int bufferSize) {<a name="line.116"></a> |
| <span class="sourceLineNo">117</span> this.bufferSize = bufferSize;<a name="line.117"></a> |
| <span class="sourceLineNo">118</span> }<a name="line.118"></a> |
| <span class="sourceLineNo">119</span><a name="line.119"></a> |
| <span class="sourceLineNo">120</span> /**<a name="line.120"></a> |
| <span class="sourceLineNo">121</span> * {@inheritDoc}<a name="line.121"></a> |
| <span class="sourceLineNo">122</span> * <a name="line.122"></a> |
| <span class="sourceLineNo">123</span> * @throws Exception if <code>writeRequest.message</code> isn't an<a name="line.123"></a> |
| <span class="sourceLineNo">124</span> * {@link IoBuffer} instance.<a name="line.124"></a> |
| <span class="sourceLineNo">125</span> */<a name="line.125"></a> |
| <span class="sourceLineNo">126</span> @Override<a name="line.126"></a> |
| <span class="sourceLineNo">127</span> public void filterWrite(NextFilter nextFilter, IoSession session, WriteRequest writeRequest) throws Exception {<a name="line.127"></a> |
| <span class="sourceLineNo">128</span><a name="line.128"></a> |
| <span class="sourceLineNo">129</span> Object data = writeRequest.getMessage();<a name="line.129"></a> |
| <span class="sourceLineNo">130</span><a name="line.130"></a> |
| <span class="sourceLineNo">131</span> if (data instanceof IoBuffer) {<a name="line.131"></a> |
| <span class="sourceLineNo">132</span> write(session, (IoBuffer) data);<a name="line.132"></a> |
| <span class="sourceLineNo">133</span> } else {<a name="line.133"></a> |
| <span class="sourceLineNo">134</span> throw new IllegalArgumentException("This filter should only buffer IoBuffer objects");<a name="line.134"></a> |
| <span class="sourceLineNo">135</span> }<a name="line.135"></a> |
| <span class="sourceLineNo">136</span> }<a name="line.136"></a> |
| <span class="sourceLineNo">137</span><a name="line.137"></a> |
| <span class="sourceLineNo">138</span> /**<a name="line.138"></a> |
| <span class="sourceLineNo">139</span> * Writes an {@link IoBuffer} to the session's buffer.<a name="line.139"></a> |
| <span class="sourceLineNo">140</span> * <a name="line.140"></a> |
| <span class="sourceLineNo">141</span> * @param session the session to which a write is requested<a name="line.141"></a> |
| <span class="sourceLineNo">142</span> * @param data the data to buffer<a name="line.142"></a> |
| <span class="sourceLineNo">143</span> */<a name="line.143"></a> |
| <span class="sourceLineNo">144</span> private void write(IoSession session, IoBuffer data) {<a name="line.144"></a> |
| <span class="sourceLineNo">145</span> IoBuffer dest = buffersMap.putIfAbsent(session, new IoBufferLazyInitializer(bufferSize));<a name="line.145"></a> |
| <span class="sourceLineNo">146</span><a name="line.146"></a> |
| <span class="sourceLineNo">147</span> write(session, data, dest);<a name="line.147"></a> |
| <span class="sourceLineNo">148</span> }<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> * Writes <code>data</code> {@link IoBuffer} to the <code>buf</code><a name="line.151"></a> |
| <span class="sourceLineNo">152</span> * {@link IoBuffer} which buffers write requests for the<a name="line.152"></a> |
| <span class="sourceLineNo">153</span> * <code>session</code> {@ link IoSession} until buffer is full<a name="line.153"></a> |
| <span class="sourceLineNo">154</span> * or manually flushed.<a name="line.154"></a> |
| <span class="sourceLineNo">155</span> * <a name="line.155"></a> |
| <span class="sourceLineNo">156</span> * @param session the session where buffer will be written<a name="line.156"></a> |
| <span class="sourceLineNo">157</span> * @param data the data to buffer<a name="line.157"></a> |
| <span class="sourceLineNo">158</span> * @param buf the buffer where data will be temporarily written<a name="line.158"></a> |
| <span class="sourceLineNo">159</span> */<a name="line.159"></a> |
| <span class="sourceLineNo">160</span> private void write(IoSession session, IoBuffer data, IoBuffer buf) {<a name="line.160"></a> |
| <span class="sourceLineNo">161</span> try {<a name="line.161"></a> |
| <span class="sourceLineNo">162</span> int len = data.remaining();<a name="line.162"></a> |
| <span class="sourceLineNo">163</span> if (len >= buf.capacity()) {<a name="line.163"></a> |
| <span class="sourceLineNo">164</span> /*<a name="line.164"></a> |
| <span class="sourceLineNo">165</span> * If the request length exceeds the size of the output buffer,<a name="line.165"></a> |
| <span class="sourceLineNo">166</span> * flush the output buffer and then write the data directly.<a name="line.166"></a> |
| <span class="sourceLineNo">167</span> */<a name="line.167"></a> |
| <span class="sourceLineNo">168</span> NextFilter nextFilter = session.getFilterChain().getNextFilter(this);<a name="line.168"></a> |
| <span class="sourceLineNo">169</span> internalFlush(nextFilter, session, buf);<a name="line.169"></a> |
| <span class="sourceLineNo">170</span> nextFilter.filterWrite(session, new DefaultWriteRequest(data));<a name="line.170"></a> |
| <span class="sourceLineNo">171</span> return;<a name="line.171"></a> |
| <span class="sourceLineNo">172</span> }<a name="line.172"></a> |
| <span class="sourceLineNo">173</span> if (len > (buf.limit() - buf.position())) {<a name="line.173"></a> |
| <span class="sourceLineNo">174</span> internalFlush(session.getFilterChain().getNextFilter(this), session, buf);<a name="line.174"></a> |
| <span class="sourceLineNo">175</span> }<a name="line.175"></a> |
| <span class="sourceLineNo">176</span> synchronized (buf) {<a name="line.176"></a> |
| <span class="sourceLineNo">177</span> buf.put(data);<a name="line.177"></a> |
| <span class="sourceLineNo">178</span> }<a name="line.178"></a> |
| <span class="sourceLineNo">179</span> } catch (Exception e) {<a name="line.179"></a> |
| <span class="sourceLineNo">180</span> session.getFilterChain().fireExceptionCaught(e);<a name="line.180"></a> |
| <span class="sourceLineNo">181</span> }<a name="line.181"></a> |
| <span class="sourceLineNo">182</span> }<a name="line.182"></a> |
| <span class="sourceLineNo">183</span><a name="line.183"></a> |
| <span class="sourceLineNo">184</span> /**<a name="line.184"></a> |
| <span class="sourceLineNo">185</span> * Internal method that actually flushes the buffered data.<a name="line.185"></a> |
| <span class="sourceLineNo">186</span> * <a name="line.186"></a> |
| <span class="sourceLineNo">187</span> * @param nextFilter the {@link NextFilter} of this filter<a name="line.187"></a> |
| <span class="sourceLineNo">188</span> * @param session the session where buffer will be written<a name="line.188"></a> |
| <span class="sourceLineNo">189</span> * @param buf the data to write<a name="line.189"></a> |
| <span class="sourceLineNo">190</span> * @throws Exception if a write operation fails<a name="line.190"></a> |
| <span class="sourceLineNo">191</span> */<a name="line.191"></a> |
| <span class="sourceLineNo">192</span> private void internalFlush(NextFilter nextFilter, IoSession session, IoBuffer buf) throws Exception {<a name="line.192"></a> |
| <span class="sourceLineNo">193</span> IoBuffer tmp = null;<a name="line.193"></a> |
| <span class="sourceLineNo">194</span> synchronized (buf) {<a name="line.194"></a> |
| <span class="sourceLineNo">195</span> buf.flip();<a name="line.195"></a> |
| <span class="sourceLineNo">196</span> tmp = buf.duplicate();<a name="line.196"></a> |
| <span class="sourceLineNo">197</span> buf.clear();<a name="line.197"></a> |
| <span class="sourceLineNo">198</span> }<a name="line.198"></a> |
| <span class="sourceLineNo">199</span> logger.debug("Flushing buffer: {}", tmp);<a name="line.199"></a> |
| <span class="sourceLineNo">200</span> nextFilter.filterWrite(session, new DefaultWriteRequest(tmp));<a name="line.200"></a> |
| <span class="sourceLineNo">201</span> }<a name="line.201"></a> |
| <span class="sourceLineNo">202</span><a name="line.202"></a> |
| <span class="sourceLineNo">203</span> /**<a name="line.203"></a> |
| <span class="sourceLineNo">204</span> * Flushes the buffered data.<a name="line.204"></a> |
| <span class="sourceLineNo">205</span> * <a name="line.205"></a> |
| <span class="sourceLineNo">206</span> * @param session the session where buffer will be written<a name="line.206"></a> |
| <span class="sourceLineNo">207</span> */<a name="line.207"></a> |
| <span class="sourceLineNo">208</span> public void flush(IoSession session) {<a name="line.208"></a> |
| <span class="sourceLineNo">209</span> try {<a name="line.209"></a> |
| <span class="sourceLineNo">210</span> internalFlush(session.getFilterChain().getNextFilter(this), session, buffersMap.get(session));<a name="line.210"></a> |
| <span class="sourceLineNo">211</span> } catch (Exception e) {<a name="line.211"></a> |
| <span class="sourceLineNo">212</span> session.getFilterChain().fireExceptionCaught(e);<a name="line.212"></a> |
| <span class="sourceLineNo">213</span> }<a name="line.213"></a> |
| <span class="sourceLineNo">214</span> }<a name="line.214"></a> |
| <span class="sourceLineNo">215</span><a name="line.215"></a> |
| <span class="sourceLineNo">216</span> /**<a name="line.216"></a> |
| <span class="sourceLineNo">217</span> * Internal method that actually frees the {@link IoBuffer} that contains<a name="line.217"></a> |
| <span class="sourceLineNo">218</span> * the buffered data that has not been flushed.<a name="line.218"></a> |
| <span class="sourceLineNo">219</span> * <a name="line.219"></a> |
| <span class="sourceLineNo">220</span> * @param session the session we operate on<a name="line.220"></a> |
| <span class="sourceLineNo">221</span> */<a name="line.221"></a> |
| <span class="sourceLineNo">222</span> private void free(IoSession session) {<a name="line.222"></a> |
| <span class="sourceLineNo">223</span> IoBuffer buf = buffersMap.remove(session);<a name="line.223"></a> |
| <span class="sourceLineNo">224</span> if (buf != null) {<a name="line.224"></a> |
| <span class="sourceLineNo">225</span> buf.free();<a name="line.225"></a> |
| <span class="sourceLineNo">226</span> }<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> * {@inheritDoc}<a name="line.230"></a> |
| <span class="sourceLineNo">231</span> */<a name="line.231"></a> |
| <span class="sourceLineNo">232</span> @Override<a name="line.232"></a> |
| <span class="sourceLineNo">233</span> public void exceptionCaught(NextFilter nextFilter, IoSession session, Throwable cause) throws Exception {<a name="line.233"></a> |
| <span class="sourceLineNo">234</span> free(session);<a name="line.234"></a> |
| <span class="sourceLineNo">235</span> nextFilter.exceptionCaught(session, cause);<a name="line.235"></a> |
| <span class="sourceLineNo">236</span> }<a name="line.236"></a> |
| <span class="sourceLineNo">237</span><a name="line.237"></a> |
| <span class="sourceLineNo">238</span> /**<a name="line.238"></a> |
| <span class="sourceLineNo">239</span> * {@inheritDoc}<a name="line.239"></a> |
| <span class="sourceLineNo">240</span> */<a name="line.240"></a> |
| <span class="sourceLineNo">241</span> @Override<a name="line.241"></a> |
| <span class="sourceLineNo">242</span> public void sessionClosed(NextFilter nextFilter, IoSession session) throws Exception {<a name="line.242"></a> |
| <span class="sourceLineNo">243</span> free(session);<a name="line.243"></a> |
| <span class="sourceLineNo">244</span> nextFilter.sessionClosed(session);<a name="line.244"></a> |
| <span class="sourceLineNo">245</span> }<a name="line.245"></a> |
| <span class="sourceLineNo">246</span>}<a name="line.246"></a> |
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| </pre> |
| </div> |
| </body> |
| </html> |