htmlformcredential.html

用JAVA编写的,在做实验的时候留下来的,本来想删的,但是传上来,大家分享吧

<a name="123" href="#123">123</a>         Map result = <strong>null</strong>;
<a name="124" href="#124">124</a>         <a href="../../../../../org/archive/crawler/settings/MapType.html">MapType</a> items = (MapType)getAttribute(ATTR_FORM_ITEMS, context);
<a name="125" href="#125">125</a>         <strong>if</strong> (items != <strong>null</strong>) {
<a name="126" href="#126">126</a>             <strong>for</strong> (Iterator i = items.iterator(context); i.hasNext();) {
<a name="127" href="#127">127</a>                 Attribute a = (Attribute)i.next();
<a name="128" href="#128">128</a>                 <strong>if</strong> (result == <strong>null</strong>) {
<a name="129" href="#129">129</a>                     result = <strong>new</strong> HashMap();
<a name="130" href="#130">130</a>                 }
<a name="131" href="#131">131</a>                 result.put(a.getName(), a.getValue());
<a name="132" href="#132">132</a>             }
<a name="133" href="#133">133</a>         }
<a name="134" href="#134">134</a>         <strong>return</strong> result;
<a name="135" href="#135">135</a>     }
<a name="136" href="#136">136</a> 
<a name="137" href="#137">137</a>     <strong>public</strong> <strong>boolean</strong> isPrerequisite(<strong>final</strong> <a href="../../../../../org/archive/crawler/datamodel/CrawlURI.html">CrawlURI</a> curi) {
<a name="138" href="#138">138</a>         <strong>boolean</strong> result = false;
<a name="139" href="#139">139</a>         String curiStr = curi.getUURI().toString();
<a name="140" href="#140">140</a>         String loginUri = getPrerequisite(curi);
<a name="141" href="#141">141</a>         <strong>if</strong> (loginUri != <strong>null</strong>) {
<a name="142" href="#142">142</a>             <strong>try</strong> {
<a name="143" href="#143">143</a>                 <a href="../../../../../org/archive/net/UURI.html">UURI</a> uuri = UURIFactory.getInstance(curi.getUURI(), loginUri);
<a name="144" href="#144">144</a>                 <strong>if</strong> (uuri != <strong>null</strong> &amp;&amp; curiStr != <strong>null</strong> &amp;&amp;
<a name="145" href="#145">145</a>                     uuri.toString().equals(curiStr)) {
<a name="146" href="#146">146</a>                     result = <strong>true</strong>;
<a name="147" href="#147">147</a>                     <strong>if</strong> (!curi.isPrerequisite()) {
<a name="148" href="#148">148</a>                         curi.setPrerequisite(<strong>true</strong>);
<a name="149" href="#149">149</a>                         logger.fine(curi + <span class="string">" is prereq."</span>);
<a name="150" href="#150">150</a>                     }
<a name="151" href="#151">151</a>                 }
<a name="152" href="#152">152</a>             } <strong>catch</strong> (URIException e) {
<a name="153" href="#153">153</a>                 logger.severe(<span class="string">"Failed to uuri: "</span> + curi + <span class="string">", "</span> +
<a name="154" href="#154">154</a>                     e.getMessage());
<a name="155" href="#155">155</a>             }
<a name="156" href="#156">156</a>         }
<a name="157" href="#157">157</a>         <strong>return</strong> result;
<a name="158" href="#158">158</a>     }
<a name="159" href="#159">159</a> 
<a name="160" href="#160">160</a>     <strong>public</strong> <strong>boolean</strong> hasPrerequisite(<a href="../../../../../org/archive/crawler/datamodel/CrawlURI.html">CrawlURI</a> curi) {
<a name="161" href="#161">161</a>         <strong>return</strong> getPrerequisite(curi) != <strong>null</strong>;
<a name="162" href="#162">162</a>     }
<a name="163" href="#163">163</a> 
<a name="164" href="#164">164</a>     <strong>public</strong> String getPrerequisite(<a href="../../../../../org/archive/crawler/datamodel/CrawlURI.html">CrawlURI</a> curi) {
<a name="165" href="#165">165</a>         String loginUri = <strong>null</strong>;
<a name="166" href="#166">166</a>         <strong>try</strong> {
<a name="167" href="#167">167</a>             loginUri = getLoginUri(curi);
<a name="168" href="#168">168</a>         } <strong>catch</strong> (AttributeNotFoundException e) {
<a name="169" href="#169">169</a>             logger.severe(<span class="string">"Failed to getLoginUri: "</span> + <strong>this</strong> + <span class="string">", "</span> + curi + <span class="string">","</span>
<a name="170" href="#170">170</a>                 + e.getMessage());
<a name="171" href="#171">171</a>             <em class="comment">// Not much I can do here. What if I fail every time? Then</em>
<a name="172" href="#172">172</a>             <em class="comment">// this prereq. will not ever be processed.  We'll never get on to</em>
<a name="173" href="#173">173</a>             <em class="comment">// this server.</em>
<a name="174" href="#174">174</a>         }
<a name="175" href="#175">175</a>         <strong>return</strong> loginUri;
<a name="176" href="#176">176</a>     }
<a name="177" href="#177">177</a> 
<a name="178" href="#178">178</a>     <strong>public</strong> String getKey(<a href="../../../../../org/archive/crawler/datamodel/CrawlURI.html">CrawlURI</a> curi) throws AttributeNotFoundException {
<a name="179" href="#179">179</a>         <strong>return</strong> getLoginUri(curi);
<a name="180" href="#180">180</a>     }
<a name="181" href="#181">181</a> 
<a name="182" href="#182">182</a>     <strong>public</strong> <strong>boolean</strong> isEveryTime() {
<a name="183" href="#183">183</a>         <em class="comment">// This authentication is one time only.</em>
<a name="184" href="#184">184</a>         <strong>return</strong> false;
<a name="185" href="#185">185</a>     }
<a name="186" href="#186">186</a> 
<a name="187" href="#187">187</a>     <strong>public</strong> <strong>boolean</strong> populate(<a href="../../../../../org/archive/crawler/datamodel/CrawlURI.html">CrawlURI</a> curi, HttpClient http, HttpMethod method,
<a name="188" href="#188">188</a>             String payload) {
<a name="189" href="#189">189</a>         <em class="comment">// http is not used.</em>
<a name="190" href="#190">190</a>         <em class="comment">// payload is not used.</em>
<a name="191" href="#191">191</a>         <strong>boolean</strong> result = false;
<a name="192" href="#192">192</a>         Map formItems = <strong>null</strong>;
<a name="193" href="#193">193</a>         <strong>try</strong> {
<a name="194" href="#194">194</a>             formItems = getFormItems(curi);
<a name="195" href="#195">195</a>         }
<a name="196" href="#196">196</a>         <strong>catch</strong> (AttributeNotFoundException e1) {
<a name="197" href="#197">197</a>             logger.severe(<span class="string">"Failed get of form items for "</span> + curi);
<a name="198" href="#198">198</a>         }
<a name="199" href="#199">199</a>         <strong>if</strong> (formItems == <strong>null</strong> || formItems.size() &lt;= 0) {
<a name="200" href="#200">200</a>             <strong>try</strong> {
<a name="201" href="#201">201</a>                 logger.severe(<span class="string">"No form items for "</span> + method.getURI());
<a name="202" href="#202">202</a>             }
<a name="203" href="#203">203</a>             <strong>catch</strong> (URIException e) {
<a name="204" href="#204">204</a>                 logger.severe(<span class="string">"No form items and exception getting uri: "</span> +
<a name="205" href="#205">205</a>                     e.getMessage());
<a name="206" href="#206">206</a>             }
<a name="207" href="#207">207</a>             <strong>return</strong> result;
<a name="208" href="#208">208</a>         }
<a name="209" href="#209">209</a> 
<a name="210" href="#210">210</a>         NameValuePair[] data = <strong>new</strong> NameValuePair[formItems.size()];
<a name="211" href="#211">211</a>         <strong>int</strong> index = 0;
<a name="212" href="#212">212</a>         String key = <strong>null</strong>;
<a name="213" href="#213">213</a>         <strong>for</strong> (Iterator i = <strong>for</strong>mItems.keySet().iterator(); i.hasNext();) {
<a name="214" href="#214">214</a>             key = (String)i.next();
<a name="215" href="#215">215</a>             data[index++] = <strong>new</strong> NameValuePair(key, (String)formItems.get(key));
<a name="216" href="#216">216</a>         }
<a name="217" href="#217">217</a>         <strong>if</strong> (method instanceof PostMethod) {
<a name="218" href="#218">218</a>             ((PostMethod)method).setRequestBody(data);
<a name="219" href="#219">219</a>             result = <strong>true</strong>;
<a name="220" href="#220">220</a>         } <strong>else</strong> <strong>if</strong> (method instanceof GetMethod) {
<a name="221" href="#221">221</a>             <em class="comment">// Append these values to the query string.</em>
<a name="222" href="#222">222</a>             <em class="comment">// Get current query string, then add data, then get it again</em>
<a name="223" href="#223">223</a>             <em class="comment">// only this time its our data only... then append.</em>
<a name="224" href="#224">224</a>             <a href="../../../../../org/apache/commons/httpclient/HttpMethodBase.html">HttpMethodBase</a> hmb = (HttpMethodBase)method;
<a name="225" href="#225">225</a>             String currentQuery = hmb.getQueryString();
<a name="226" href="#226">226</a>             hmb.setQueryString(data);
<a name="227" href="#227">227</a>             String newQuery = hmb.getQueryString();
<a name="228" href="#228">228</a>             hmb.setQueryString(((currentQuery != <strong>null</strong>)? currentQuery: <span class="string">""</span>) +
<a name="229" href="#229">229</a>             		<span class="string">"&amp;"</span> + newQuery);
<a name="230" href="#230">230</a>             result = <strong>true</strong>;
<a name="231" href="#231">231</a>         } <strong>else</strong> {
<a name="232" href="#232">232</a>             logger.severe(<span class="string">"Unknown method type: "</span> + method);
<a name="233" href="#233">233</a>         }
<a name="234" href="#234">234</a>         <strong>return</strong> result;
<a name="235" href="#235">235</a>     }
<a name="236" href="#236">236</a> 
<a name="237" href="#237">237</a>     <strong>public</strong> <strong>boolean</strong> isPost(<a href="../../../../../org/archive/crawler/datamodel/CrawlURI.html">CrawlURI</a> curi) {
<a name="238" href="#238">238</a>         String method = <strong>null</strong>;
<a name="239" href="#239">239</a>         <strong>try</strong> {
<a name="240" href="#240">240</a>             method = getHttpMethod(curi);
<a name="241" href="#241">241</a>         }
<a name="242" href="#242">242</a>         <strong>catch</strong> (AttributeNotFoundException e) {
<a name="243" href="#243">243</a>             logger.severe(<span class="string">"Failed to get method for "</span> + curi + <span class="string">", "</span> + <strong>this</strong>);
<a name="244" href="#244">244</a>         }
<a name="245" href="#245">245</a>         <strong>return</strong> method != <strong>null</strong> &amp;&amp; method.equalsIgnoreCase(<span class="string">"POST"</span>);
<a name="246" href="#246">246</a>     }
<a name="247" href="#247">247</a> }
</pre>
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