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<a name="1" href="#1">1</a> <em class="jxr_comment">/*</em>
<a name="2" href="#2">2</a> <em class="jxr_comment"> * Licensed to the Apache Software Foundation (ASF) under one</em>
<a name="3" href="#3">3</a> <em class="jxr_comment"> * or more contributor license agreements. See the NOTICE file</em>
<a name="4" href="#4">4</a> <em class="jxr_comment"> * distributed with this work for additional information</em>
<a name="5" href="#5">5</a> <em class="jxr_comment"> * regarding copyright ownership. The ASF licenses this file</em>
<a name="6" href="#6">6</a> <em class="jxr_comment"> * to you under the Apache License, Version 2.0 (the</em>
<a name="7" href="#7">7</a> <em class="jxr_comment"> * "License"); you may not use this file except in compliance</em>
<a name="8" href="#8">8</a> <em class="jxr_comment"> * with the License. You may obtain a copy of the License at</em>
<a name="9" href="#9">9</a> <em class="jxr_comment"> *</em>
<a name="10" href="#10">10</a> <em class="jxr_comment"> * <a href="http://www.apache.org/licenses/LICENSE-2.0" target="alexandria_uri">http://www.apache.org/licenses/LICENSE-2.0</a></em>
<a name="11" href="#11">11</a> <em class="jxr_comment"> *</em>
<a name="12" href="#12">12</a> <em class="jxr_comment"> * Unless required by applicable law or agreed to in writing,</em>
<a name="13" href="#13">13</a> <em class="jxr_comment"> * software distributed under the License is distributed on an</em>
<a name="14" href="#14">14</a> <em class="jxr_comment"> * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY</em>
<a name="15" href="#15">15</a> <em class="jxr_comment"> * KIND, either express or implied. See the License for the</em>
<a name="16" href="#16">16</a> <em class="jxr_comment"> * specific language governing permissions and limitations</em>
<a name="17" href="#17">17</a> <em class="jxr_comment"> * under the License.</em>
<a name="18" href="#18">18</a> <em class="jxr_comment"> *</em>
<a name="19" href="#19">19</a> <em class="jxr_comment"> */</em>
<a name="20" href="#20">20</a> <strong class="jxr_keyword">package</strong> org.apache.mina.proxy;
<a name="21" href="#21">21</a>
<a name="22" href="#22">22</a> <strong class="jxr_keyword">import</strong> java.io.UnsupportedEncodingException;
<a name="23" href="#23">23</a> <strong class="jxr_keyword">import</strong> java.util.LinkedList;
<a name="24" href="#24">24</a> <strong class="jxr_keyword">import</strong> java.util.Queue;
<a name="25" href="#25">25</a>
<a name="26" href="#26">26</a> <strong class="jxr_keyword">import</strong> org.apache.mina.core.buffer.IoBuffer;
<a name="27" href="#27">27</a> <strong class="jxr_keyword">import</strong> org.apache.mina.core.filterchain.IoFilter.NextFilter;
<a name="28" href="#28">28</a> <strong class="jxr_keyword">import</strong> org.apache.mina.core.future.DefaultWriteFuture;
<a name="29" href="#29">29</a> <strong class="jxr_keyword">import</strong> org.apache.mina.core.future.WriteFuture;
<a name="30" href="#30">30</a> <strong class="jxr_keyword">import</strong> org.apache.mina.core.session.IoSession;
<a name="31" href="#31">31</a> <strong class="jxr_keyword">import</strong> org.apache.mina.core.write.DefaultWriteRequest;
<a name="32" href="#32">32</a> <strong class="jxr_keyword">import</strong> org.apache.mina.core.write.WriteRequest;
<a name="33" href="#33">33</a> <strong class="jxr_keyword">import</strong> org.apache.mina.proxy.filter.ProxyFilter;
<a name="34" href="#34">34</a> <strong class="jxr_keyword">import</strong> org.apache.mina.proxy.filter.ProxyHandshakeIoBuffer;
<a name="35" href="#35">35</a> <strong class="jxr_keyword">import</strong> org.apache.mina.proxy.session.ProxyIoSession;
<a name="36" href="#36">36</a> <strong class="jxr_keyword">import</strong> org.slf4j.Logger;
<a name="37" href="#37">37</a> <strong class="jxr_keyword">import</strong> org.slf4j.LoggerFactory;
<a name="38" href="#38">38</a>
<a name="39" href="#39">39</a> <em class="jxr_javadoccomment">/**</em>
<a name="40" href="#40">40</a> <em class="jxr_javadoccomment"> * AbstractProxyLogicHandler.java - Helper class to handle proxy handshaking logic. Derived classes </em>
<a name="41" href="#41">41</a> <em class="jxr_javadoccomment"> * implement proxy type specific logic.</em>
<a name="42" href="#42">42</a> <em class="jxr_javadoccomment"> * &lt;p&gt;</em>
<a name="43" href="#43">43</a> <em class="jxr_javadoccomment"> * Based upon SSLHandler from mina-filter-ssl.</em>
<a name="44" href="#44">44</a> <em class="jxr_javadoccomment"> * </em>
<a name="45" href="#45">45</a> <em class="jxr_javadoccomment"> * @author The Apache MINA Project (dev@mina.apache.org)</em>
<a name="46" href="#46">46</a> <em class="jxr_javadoccomment"> * @version $Rev: 759663 $, $Date: 2009-03-29 12:46:40 +0200 (Sun, 29 Mar 2009) $</em>
<a name="47" href="#47">47</a> <em class="jxr_javadoccomment"> * @since MINA 2.0.0-M3</em>
<a name="48" href="#48">48</a> <em class="jxr_javadoccomment"> */</em>
<a name="49" href="#49">49</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">abstract</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../org/apache/mina/proxy/AbstractProxyLogicHandler.html">AbstractProxyLogicHandler</a> implements <a href="../../../../org/apache/mina/proxy/ProxyLogicHandler.html">ProxyLogicHandler</a> {
<a name="50" href="#50">50</a>
<a name="51" href="#51">51</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">static</strong> Logger logger = LoggerFactory
<a name="52" href="#52">52</a> .getLogger(AbstractProxyLogicHandler.<strong class="jxr_keyword">class</strong>);
<a name="53" href="#53">53</a>
<a name="54" href="#54">54</a> <em class="jxr_javadoccomment">/**</em>
<a name="55" href="#55">55</a> <em class="jxr_javadoccomment"> * Object that contains all the proxy authentication session informations.</em>
<a name="56" href="#56">56</a> <em class="jxr_javadoccomment"> */</em>
<a name="57" href="#57">57</a> <strong class="jxr_keyword">private</strong> <a href="../../../../org/apache/mina/proxy/session/ProxyIoSession.html">ProxyIoSession</a> proxyIoSession;
<a name="58" href="#58">58</a>
<a name="59" href="#59">59</a> <em class="jxr_javadoccomment">/**</em>
<a name="60" href="#60">60</a> <em class="jxr_javadoccomment"> * Queue of write events which occurred before the proxy handshake had completed.</em>
<a name="61" href="#61">61</a> <em class="jxr_javadoccomment"> */</em>
<a name="62" href="#62">62</a> <strong class="jxr_keyword">private</strong> Queue&lt;Event&gt; writeRequestQueue = <strong class="jxr_keyword">null</strong>;
<a name="63" href="#63">63</a>
<a name="64" href="#64">64</a> <em class="jxr_javadoccomment">/**</em>
<a name="65" href="#65">65</a> <em class="jxr_javadoccomment"> * Has the handshake been completed.</em>
<a name="66" href="#66">66</a> <em class="jxr_javadoccomment"> */</em>
<a name="67" href="#67">67</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">boolean</strong> handshakeComplete = false;
<a name="68" href="#68">68</a>
<a name="69" href="#69">69</a> <em class="jxr_javadoccomment">/**</em>
<a name="70" href="#70">70</a> <em class="jxr_javadoccomment"> * Creates a new {@link AbstractProxyLogicHandler}.</em>
<a name="71" href="#71">71</a> <em class="jxr_javadoccomment"> * </em>
<a name="72" href="#72">72</a> <em class="jxr_javadoccomment"> * @param proxyIoSession {@link ProxyIoSession} in use.</em>
<a name="73" href="#73">73</a> <em class="jxr_javadoccomment"> */</em>
<a name="74" href="#74">74</a> <strong class="jxr_keyword">public</strong> <a href="../../../../org/apache/mina/proxy/AbstractProxyLogicHandler.html">AbstractProxyLogicHandler</a>(<a href="../../../../org/apache/mina/proxy/session/ProxyIoSession.html">ProxyIoSession</a> proxyIoSession) {
<a name="75" href="#75">75</a> <strong class="jxr_keyword">this</strong>.proxyIoSession = proxyIoSession;
<a name="76" href="#76">76</a> }
<a name="77" href="#77">77</a>
<a name="78" href="#78">78</a> <em class="jxr_javadoccomment">/**</em>
<a name="79" href="#79">79</a> <em class="jxr_javadoccomment"> * Returns the proxy filter {@link ProxyFilter}.</em>
<a name="80" href="#80">80</a> <em class="jxr_javadoccomment"> */</em>
<a name="81" href="#81">81</a> <strong class="jxr_keyword">protected</strong> <a href="../../../../org/apache/mina/proxy/filter/ProxyFilter.html">ProxyFilter</a> getProxyFilter() {
<a name="82" href="#82">82</a> <strong class="jxr_keyword">return</strong> proxyIoSession.getProxyFilter();
<a name="83" href="#83">83</a> }
<a name="84" href="#84">84</a>
<a name="85" href="#85">85</a> <em class="jxr_javadoccomment">/**</em>
<a name="86" href="#86">86</a> <em class="jxr_javadoccomment"> * Returns the session.</em>
<a name="87" href="#87">87</a> <em class="jxr_javadoccomment"> */</em>
<a name="88" href="#88">88</a> <strong class="jxr_keyword">protected</strong> <a href="../../../../org/apache/mina/core/session/IoSession.html">IoSession</a> getSession() {
<a name="89" href="#89">89</a> <strong class="jxr_keyword">return</strong> proxyIoSession.getSession();
<a name="90" href="#90">90</a> }
<a name="91" href="#91">91</a>
<a name="92" href="#92">92</a> <em class="jxr_javadoccomment">/**</em>
<a name="93" href="#93">93</a> <em class="jxr_javadoccomment"> * Returns the {@link ProxyIoSession} object.</em>
<a name="94" href="#94">94</a> <em class="jxr_javadoccomment"> */</em>
<a name="95" href="#95">95</a> <strong class="jxr_keyword">public</strong> <a href="../../../../org/apache/mina/proxy/session/ProxyIoSession.html">ProxyIoSession</a> getProxyIoSession() {
<a name="96" href="#96">96</a> <strong class="jxr_keyword">return</strong> proxyIoSession;
<a name="97" href="#97">97</a> }
<a name="98" href="#98">98</a>
<a name="99" href="#99">99</a> <em class="jxr_javadoccomment">/**</em>
<a name="100" href="#100">100</a> <em class="jxr_javadoccomment"> * Writes data to the proxy server.</em>
<a name="101" href="#101">101</a> <em class="jxr_javadoccomment"> * </em>
<a name="102" href="#102">102</a> <em class="jxr_javadoccomment"> * @param nextFilter the next filter</em>
<a name="103" href="#103">103</a> <em class="jxr_javadoccomment"> * @param data Data buffer to be written.</em>
<a name="104" href="#104">104</a> <em class="jxr_javadoccomment"> */</em>
<a name="105" href="#105">105</a> <strong class="jxr_keyword">protected</strong> <a href="../../../../org/apache/mina/core/future/WriteFuture.html">WriteFuture</a> writeData(<strong class="jxr_keyword">final</strong> NextFilter nextFilter,
<a name="106" href="#106">106</a> <strong class="jxr_keyword">final</strong> <a href="../../../../org/apache/mina/core/buffer/IoBuffer.html">IoBuffer</a> data) <strong class="jxr_keyword">throws</strong> UnsupportedEncodingException {
<a name="107" href="#107">107</a> <em class="jxr_comment">// write net data</em>
<a name="108" href="#108">108</a> <a href="../../../../org/apache/mina/proxy/filter/ProxyHandshakeIoBuffer.html">ProxyHandshakeIoBuffer</a> writeBuffer = <strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/mina/proxy/filter/ProxyHandshakeIoBuffer.html">ProxyHandshakeIoBuffer</a>(data);
<a name="109" href="#109">109</a>
<a name="110" href="#110">110</a> logger.debug(<span class="jxr_string">" session write: {}"</span>, writeBuffer);
<a name="111" href="#111">111</a>
<a name="112" href="#112">112</a> <a href="../../../../org/apache/mina/core/future/WriteFuture.html">WriteFuture</a> writeFuture = <strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/mina/core/future/DefaultWriteFuture.html">DefaultWriteFuture</a>(getSession());
<a name="113" href="#113">113</a> getProxyFilter().writeData(nextFilter, getSession(),
<a name="114" href="#114">114</a> <strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/mina/core/write/DefaultWriteRequest.html">DefaultWriteRequest</a>(writeBuffer, writeFuture), <strong class="jxr_keyword">true</strong>);
<a name="115" href="#115">115</a>
<a name="116" href="#116">116</a> <strong class="jxr_keyword">return</strong> writeFuture;
<a name="117" href="#117">117</a> }
<a name="118" href="#118">118</a>
<a name="119" href="#119">119</a> <em class="jxr_javadoccomment">/**</em>
<a name="120" href="#120">120</a> <em class="jxr_javadoccomment"> * Returns &lt;code&gt;true&lt;/code&gt; if handshaking is complete and</em>
<a name="121" href="#121">121</a> <em class="jxr_javadoccomment"> * data can be sent through the proxy.</em>
<a name="122" href="#122">122</a> <em class="jxr_javadoccomment"> */</em>
<a name="123" href="#123">123</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> isHandshakeComplete() {
<a name="124" href="#124">124</a> <strong class="jxr_keyword">synchronized</strong> (<strong class="jxr_keyword">this</strong>) {
<a name="125" href="#125">125</a> <strong class="jxr_keyword">return</strong> handshakeComplete;
<a name="126" href="#126">126</a> }
<a name="127" href="#127">127</a> }
<a name="128" href="#128">128</a>
<a name="129" href="#129">129</a> <em class="jxr_javadoccomment">/**</em>
<a name="130" href="#130">130</a> <em class="jxr_javadoccomment"> * Signals that the handshake has finished.</em>
<a name="131" href="#131">131</a> <em class="jxr_javadoccomment"> */</em>
<a name="132" href="#132">132</a> <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">void</strong> setHandshakeComplete() {
<a name="133" href="#133">133</a> <strong class="jxr_keyword">synchronized</strong> (<strong class="jxr_keyword">this</strong>) {
<a name="134" href="#134">134</a> handshakeComplete = <strong class="jxr_keyword">true</strong>;
<a name="135" href="#135">135</a> }
<a name="136" href="#136">136</a>
<a name="137" href="#137">137</a> <a href="../../../../org/apache/mina/proxy/session/ProxyIoSession.html">ProxyIoSession</a> proxyIoSession = getProxyIoSession();
<a name="138" href="#138">138</a> proxyIoSession.getConnector()
<a name="139" href="#139">139</a> .fireConnected(proxyIoSession.getSession())
<a name="140" href="#140">140</a> .awaitUninterruptibly();
<a name="141" href="#141">141</a>
<a name="142" href="#142">142</a> logger.debug(<span class="jxr_string">" handshake completed"</span>);
<a name="143" href="#143">143</a>
<a name="144" href="#144">144</a> <em class="jxr_comment">// Connected OK</em>
<a name="145" href="#145">145</a> <strong class="jxr_keyword">try</strong> {
<a name="146" href="#146">146</a> proxyIoSession.getEventQueue().flushPendingSessionEvents();
<a name="147" href="#147">147</a> flushPendingWriteRequests();
<a name="148" href="#148">148</a> } <strong class="jxr_keyword">catch</strong> (Exception ex) {
<a name="149" href="#149">149</a> logger.error(<span class="jxr_string">"Unable to flush pending write requests"</span>, ex);
<a name="150" href="#150">150</a> }
<a name="151" href="#151">151</a> }
<a name="152" href="#152">152</a>
<a name="153" href="#153">153</a> <em class="jxr_javadoccomment">/**</em>
<a name="154" href="#154">154</a> <em class="jxr_javadoccomment"> * Send any write requests which were queued whilst waiting for handshaking to complete.</em>
<a name="155" href="#155">155</a> <em class="jxr_javadoccomment"> */</em>
<a name="156" href="#156">156</a> <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">synchronized</strong> <strong class="jxr_keyword">void</strong> flushPendingWriteRequests() <strong class="jxr_keyword">throws</strong> Exception {
<a name="157" href="#157">157</a> logger.debug(<span class="jxr_string">" flushPendingWriteRequests()"</span>);
<a name="158" href="#158">158</a>
<a name="159" href="#159">159</a> <strong class="jxr_keyword">if</strong> (writeRequestQueue == <strong class="jxr_keyword">null</strong>) {
<a name="160" href="#160">160</a> <strong class="jxr_keyword">return</strong>;
<a name="161" href="#161">161</a> }
<a name="162" href="#162">162</a>
<a name="163" href="#163">163</a> <a href="../../../../org/apache/mina/proxy/AbstractProxyLogicHandler.html">Event</a> scheduledWrite;
<a name="164" href="#164">164</a> <strong class="jxr_keyword">while</strong> ((scheduledWrite = writeRequestQueue.poll()) != <strong class="jxr_keyword">null</strong>) {
<a name="165" href="#165">165</a> logger.debug(<span class="jxr_string">" Flushing buffered write request: {}"</span>,
<a name="166" href="#166">166</a> scheduledWrite.data);
<a name="167" href="#167">167</a>
<a name="168" href="#168">168</a> getProxyFilter().filterWrite(scheduledWrite.nextFilter,
<a name="169" href="#169">169</a> getSession(), (WriteRequest) scheduledWrite.data);
<a name="170" href="#170">170</a> }
<a name="171" href="#171">171</a>
<a name="172" href="#172">172</a> <em class="jxr_comment">// Free queue</em>
<a name="173" href="#173">173</a> writeRequestQueue = <strong class="jxr_keyword">null</strong>;
<a name="174" href="#174">174</a> }
<a name="175" href="#175">175</a>
<a name="176" href="#176">176</a> <em class="jxr_javadoccomment">/**</em>
<a name="177" href="#177">177</a> <em class="jxr_javadoccomment"> * Enqueue a message to be written once handshaking is complete.</em>
<a name="178" href="#178">178</a> <em class="jxr_javadoccomment"> */</em>
<a name="179" href="#179">179</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">synchronized</strong> <strong class="jxr_keyword">void</strong> enqueueWriteRequest(<strong class="jxr_keyword">final</strong> NextFilter nextFilter,
<a name="180" href="#180">180</a> <strong class="jxr_keyword">final</strong> <a href="../../../../org/apache/mina/core/write/WriteRequest.html">WriteRequest</a> writeRequest) {
<a name="181" href="#181">181</a> <strong class="jxr_keyword">if</strong> (writeRequestQueue == <strong class="jxr_keyword">null</strong>) {
<a name="182" href="#182">182</a> writeRequestQueue = <strong class="jxr_keyword">new</strong> LinkedList&lt;Event&gt;();
<a name="183" href="#183">183</a> }
<a name="184" href="#184">184</a>
<a name="185" href="#185">185</a> writeRequestQueue.offer(<strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/mina/proxy/AbstractProxyLogicHandler.html">Event</a>(nextFilter, writeRequest));
<a name="186" href="#186">186</a> }
<a name="187" href="#187">187</a>
<a name="188" href="#188">188</a> <em class="jxr_javadoccomment">/**</em>
<a name="189" href="#189">189</a> <em class="jxr_javadoccomment"> * Close the session.</em>
<a name="190" href="#190">190</a> <em class="jxr_javadoccomment"> */</em>
<a name="191" href="#191">191</a> <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">void</strong> closeSession(<strong class="jxr_keyword">final</strong> String message, <strong class="jxr_keyword">final</strong> Throwable t) {
<a name="192" href="#192">192</a> <strong class="jxr_keyword">if</strong> (t != <strong class="jxr_keyword">null</strong>) {
<a name="193" href="#193">193</a> logger.error(message, t);
<a name="194" href="#194">194</a> proxyIoSession.setAuthenticationFailed(<strong class="jxr_keyword">true</strong>);
<a name="195" href="#195">195</a> } <strong class="jxr_keyword">else</strong> {
<a name="196" href="#196">196</a> logger.error(message);
<a name="197" href="#197">197</a> }
<a name="198" href="#198">198</a>
<a name="199" href="#199">199</a> getSession().close(<strong class="jxr_keyword">true</strong>);
<a name="200" href="#200">200</a> }
<a name="201" href="#201">201</a>
<a name="202" href="#202">202</a> <em class="jxr_javadoccomment">/**</em>
<a name="203" href="#203">203</a> <em class="jxr_javadoccomment"> * Close the session.</em>
<a name="204" href="#204">204</a> <em class="jxr_javadoccomment"> * </em>
<a name="205" href="#205">205</a> <em class="jxr_javadoccomment"> * @param message</em>
<a name="206" href="#206">206</a> <em class="jxr_javadoccomment"> */</em>
<a name="207" href="#207">207</a> <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">void</strong> closeSession(<strong class="jxr_keyword">final</strong> String message) {
<a name="208" href="#208">208</a> closeSession(message, <strong class="jxr_keyword">null</strong>);
<a name="209" href="#209">209</a> }
<a name="210" href="#210">210</a>
<a name="211" href="#211">211</a> <em class="jxr_javadoccomment">/**</em>
<a name="212" href="#212">212</a> <em class="jxr_javadoccomment"> * Event wrapper class for enqueued events.</em>
<a name="213" href="#213">213</a> <em class="jxr_javadoccomment"> */</em>
<a name="214" href="#214">214</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../org/apache/mina/proxy/AbstractProxyLogicHandler.html">Event</a> {
<a name="215" href="#215">215</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> NextFilter nextFilter;
<a name="216" href="#216">216</a>
<a name="217" href="#217">217</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> Object data;
<a name="218" href="#218">218</a>
<a name="219" href="#219">219</a> <a href="../../../../org/apache/mina/proxy/AbstractProxyLogicHandler.html">Event</a>(<strong class="jxr_keyword">final</strong> NextFilter nextFilter, <strong class="jxr_keyword">final</strong> Object data) {
<a name="220" href="#220">220</a> <strong class="jxr_keyword">this</strong>.nextFilter = nextFilter;
<a name="221" href="#221">221</a> <strong class="jxr_keyword">this</strong>.data = data;
<a name="222" href="#222">222</a> }
<a name="223" href="#223">223</a>
<a name="224" href="#224">224</a> <strong class="jxr_keyword">public</strong> Object getData() {
<a name="225" href="#225">225</a> <strong class="jxr_keyword">return</strong> data;
<a name="226" href="#226">226</a> }
<a name="227" href="#227">227</a>
<a name="228" href="#228">228</a> <strong class="jxr_keyword">public</strong> NextFilter getNextFilter() {
<a name="229" href="#229">229</a> <strong class="jxr_keyword">return</strong> nextFilter;
<a name="230" href="#230">230</a> }
<a name="231" href="#231">231</a> }
<a name="232" href="#232">232</a> }
</pre>
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