<a name="109" href="#109">109</a> <a name="110" href="#110">110</a>     <strong>protected</strong> <strong>void</strong> innerProcess(<a href="../../../../org/archive/crawler/datamodel/CrawlURI.html">CrawlURI</a> curi) {<a name="111" href="#111">111</a>         <strong>if</strong> (!curi.getUURI().getScheme().equals(<span class="string">"dns"</span>)) {<a name="112" href="#112">112</a>             <em class="comment">// Only handles dns</em><a name="113" href="#113">113</a>             <strong>return</strong>;<a name="114" href="#114">114</a>         }<a name="115" href="#115">115</a>         Record[] rrecordSet = <strong>null</strong>; <em class="comment">// Retrieved dns records</em><a name="116" href="#116">116</a>         String dnsName = <strong>null</strong>;<a name="117" href="#117">117</a>         <strong>try</strong> {<a name="118" href="#118">118</a>             dnsName = curi.getUURI().getReferencedHost();<a name="119" href="#119">119</a>         } <strong>catch</strong> (URIException e) {<a name="120" href="#120">120</a>             logger.log(Level.SEVERE, <span class="string">"Failed parse of dns record "</span> + curi, e);<a name="121" href="#121">121</a>         }<a name="122" href="#122">122</a>         <a name="123" href="#123">123</a>         <strong>if</strong>(dnsName == <strong>null</strong>) {<a name="124" href="#124">124</a>             curi.setFetchStatus(S_UNFETCHABLE_URI);<a name="125" href="#125">125</a>             <strong>return</strong>;<a name="126" href="#126">126</a>         }<a name="127" href="#127">127</a> <a name="128" href="#128">128</a>         <em class="comment">// Make sure we're in "normal operating mode", e.g. a cache +</em><a name="129" href="#129">129</a>         <em class="comment">// controller exist to assist us.</em><a name="130" href="#130">130</a>         <a href="../../../../org/archive/crawler/datamodel/CrawlHost.html">CrawlHost</a> targetHost = <strong>null</strong>;<a name="131" href="#131">131</a>         <strong>if</strong> (getController() != <strong>null</strong> &amp;&amp;<a name="132" href="#132">132</a>                 getController().getServerCache() != <strong>null</strong>) {<a name="133" href="#133">133</a>             targetHost = getController().getServerCache().getHostFor(dnsName);<a name="134" href="#134">134</a>         } <strong>else</strong> {<a name="135" href="#135">135</a>             <em class="comment">// Standalone operation (mostly for test cases/potential other uses)</em><a name="136" href="#136">136</a>             targetHost = <strong>new</strong> <a href="../../../../org/archive/crawler/datamodel/CrawlHost.html">CrawlHost</a>(dnsName);<a name="137" href="#137">137</a>         }<a name="138" href="#138">138</a>         <strong>if</strong> (isQuadAddress(curi, dnsName, targetHost)) {<a name="139" href="#139">139</a>         	<em class="comment">// We're done processing.</em><a name="140" href="#140">140</a>         	<strong>return</strong>;<a name="141" href="#141">141</a>         }<a name="142" href="#142">142</a>         <a name="143" href="#143">143</a>         <em class="comment">// Do actual DNS lookup.</em><a name="144" href="#144">144</a>         curi.putLong(A_FETCH_BEGAN_TIME, System.currentTimeMillis());<a name="145" href="#145">145</a> <a name="146" href="#146">146</a>         <em class="comment">// Try to get the records for this host (assume domain name)</em><a name="147" href="#147">147</a>         <em class="comment">// TODO: Bug #935119 concerns potential hang here</em><a name="148" href="#148">148</a>         <strong>try</strong> {<a name="149" href="#149">149</a>             rrecordSet = (<strong>new</strong> Lookup(dnsName, TypeType, ClassType)).run();<a name="150" href="#150">150</a>         } <strong>catch</strong> (TextParseException e) {<a name="151" href="#151">151</a>             rrecordSet = <strong>null</strong>;<a name="152" href="#152">152</a>         }<a name="153" href="#153">153</a>         curi.setContentType(<span class="string">"text/dns"</span>);<a name="154" href="#154">154</a>         <strong>if</strong> (rrecordSet != <strong>null</strong>) {<a name="155" href="#155">155</a>             <strong>if</strong> (logger.isLoggable(Level.FINE)) {<a name="156" href="#156">156</a>                 logger.fine(<span class="string">"Found recordset for "</span> + dnsName);<a name="157" href="#157">157</a>             }<a name="158" href="#158">158</a>         	storeDNSRecord(curi, dnsName, targetHost, rrecordSet);<a name="159" href="#159">159</a>         } <strong>else</strong> {<a name="160" href="#160">160</a>             <strong>if</strong> (logger.isLoggable(Level.FINE)) {<a name="161" href="#161">161</a>                 logger.fine(<span class="string">"Failed find of recordset for "</span> + dnsName);<a name="162" href="#162">162</a>             }<a name="163" href="#163">163</a>             <strong>if</strong> (((Boolean)getUncheckedAttribute(<strong>null</strong>,<a name="164" href="#164">164</a>                     ATTR_ACCEPT_NON_DNS_RESOLVES)).booleanValue()) {<a name="165" href="#165">165</a>                 <em class="comment">// Do lookup that bypasses javadns.</em><a name="166" href="#166">166</a>                 InetAddress address = <strong>null</strong>;<a name="167" href="#167">167</a>                 <strong>try</strong> {<a name="168" href="#168">168</a>                     address = InetAddress.getByName(dnsName);<a name="169" href="#169">169</a>                 } <strong>catch</strong> (UnknownHostException e1) {<a name="170" href="#170">170</a>                     address = <strong>null</strong>;<a name="171" href="#171">171</a>                 }<a name="172" href="#172">172</a>                 <strong>if</strong> (address != <strong>null</strong>) {<a name="173" href="#173">173</a>                     targetHost.setIP(address, DEFAULT_TTL_FOR_NON_DNS_RESOLVES);<a name="174" href="#174">174</a>                     curi.setFetchStatus(S_GETBYNAME_SUCCESS);<a name="175" href="#175">175</a>                     <strong>if</strong> (logger.isLoggable(Level.FINE)) {<a name="176" href="#176">176</a>                         logger.fine(<span class="string">"Found address for "</span> + dnsName +<a name="177" href="#177">177</a>                             <span class="string">" using native dns."</span>);<a name="178" href="#178">178</a>                     }<a name="179" href="#179">179</a>                 } <strong>else</strong> {<a name="180" href="#180">180</a>                     <strong>if</strong> (logger.isLoggable(Level.FINE)) {<a name="181" href="#181">181</a>                         logger.fine(<span class="string">"Failed find of address for "</span> + dnsName +<a name="182" href="#182">182</a>                             <span class="string">" using native dns."</span>);<a name="183" href="#183">183</a>                     }<a name="184" href="#184">184</a>                     setUnresolvable(curi, targetHost);<a name="185" href="#185">185</a>                 }<a name="186" href="#186">186</a>             } <strong>else</strong> {<a name="187" href="#187">187</a>                 setUnresolvable(curi, targetHost);<a name="188" href="#188">188</a>             }<a name="189" href="#189">189</a>         }<a name="190" href="#190">190</a>         curi.putLong(A_FETCH_COMPLETED_TIME, System.currentTimeMillis());<a name="191" href="#191">191</a>     }<a name="192" href="#192">192</a>     <a name="193" href="#193">193</a>     <strong>protected</strong> <strong>void</strong> storeDNSRecord(<strong>final</strong> <a href="../../../../org/archive/crawler/datamodel/CrawlURI.html">CrawlURI</a> curi, <strong>final</strong> String dnsName,<a name="194" href="#194">194</a>     		<strong>final</strong> <a href="../../../../org/archive/crawler/datamodel/CrawlHost.html">CrawlHost</a> targetHost, <strong>final</strong> Record[] rrecordSet) {<a name="195" href="#195">195</a>         <em class="comment">// Get TTL and IP info from the first A record (there may be</em><a name="196" href="#196">196</a>         <em class="comment">// multiple, e.g. www.washington.edu) then update the CrawlServer</em><a name="197" href="#197">197</a>         ARecord arecord = getFirstARecord(rrecordSet);<a name="198" href="#198">198</a>         <strong>if</strong> (arecord == <strong>null</strong>) {<a name="199" href="#199">199</a>             <strong>throw</strong> <strong>new</strong> NullPointerException(<span class="string">"Got null arecord for "</span> +<a name="200" href="#200">200</a>                 dnsName);<a name="201" href="#201">201</a>         }<a name="202" href="#202">202</a>         targetHost.setIP(arecord.getAddress(), arecord.getTTL());<a name="203" href="#203">203</a>         <strong>try</strong> {<a name="204" href="#204">204</a>         	recordDNS(curi, rrecordSet);<a name="205" href="#205">205</a>             curi.setFetchStatus(S_DNS_SUCCESS);<a name="206" href="#206">206</a>             curi.putString(A_DNS_SERVER_IP_LABEL, ResolverConfig.getCurrentConfig().server());<a name="207" href="#207">207</a>         } <strong>catch</strong> (IOException e) {<a name="208" href="#208">208</a>         	logger.log(Level.SEVERE, <span class="string">"Failed store of DNS Record for "</span> +<a name="209" href="#209">209</a>         		curi.toString(), e);<a name="210" href="#210">210</a>         	setUnresolvable(curi, targetHost);<a name="211" href="#211">211</a>         }<a name="212" href="#212">212</a>     }<a name="213" href="#213">213</a>     <a name="214" href="#214">214</a>     <strong>protected</strong> <strong>boolean</strong> isQuadAddress(<strong>final</strong> <a href="../../../../org/archive/crawler/datamodel/CrawlURI.html">CrawlURI</a> curi, <strong>final</strong> String dnsName,<a name="215" href="#215">215</a> 			<strong>final</strong> <a href="../../../../org/archive/crawler/datamodel/CrawlHost.html">CrawlHost</a> targetHost) {<a name="216" href="#216">216</a> 		<strong>boolean</strong> result = false;<a name="217" href="#217">217</a> 		Matcher matcher = InetAddressUtil.IPV4_QUADS.matcher(dnsName);<a name="218" href="#218">218</a> 		<em class="comment">// If it's an ip no need to do a lookup</em><a name="219" href="#219">219</a> 		<strong>if</strong> (matcher == <strong>null</strong> || !matcher.matches()) {<a name="220" href="#220">220</a> 			<strong>return</strong> result;<a name="221" href="#221">221</a> 		}<a name="222" href="#222">222</a> 		<a name="223" href="#223">223</a> 		result = <strong>true</strong>;<a name="224" href="#224">224</a> 		<em class="comment">// Ideally this branch would never be reached: no CrawlURI</em><a name="225" href="#225">225</a> 		<em class="comment">// would be created for numerical IPs</em>