multipartstream.html

java 的上传功能很强大的实施上述事实上说是

<a name="119" href="#119">119</a>         <strong class="jxr_keyword">void</strong> noteBytesRead(<strong class="jxr_keyword">int</strong> pBytes) {
<a name="120" href="#120">120</a>             <em class="jxr_comment">/*<em class="jxr_comment"> Indicates, that the given number of bytes have been read from</em></em>
<a name="121" href="#121">121</a> <em class="jxr_comment">             * the input stream.</em>
<a name="122" href="#122">122</a> <em class="jxr_comment">             */</em>
<a name="123" href="#123">123</a>             bytesRead += pBytes;
<a name="124" href="#124">124</a>             notifyListener();
<a name="125" href="#125">125</a>         }
<a name="126" href="#126">126</a>         <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> Called to indicate, that a new file item has been detected.</em>
<a name="127" href="#127">127</a> <em class="jxr_javadoccomment">         */</em>
<a name="128" href="#128">128</a>         <strong class="jxr_keyword">void</strong> noteItem() {
<a name="129" href="#129">129</a>             ++items;
<a name="130" href="#130">130</a>         }
<a name="131" href="#131">131</a>         <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> Called for notifying the listener.</em>
<a name="132" href="#132">132</a> <em class="jxr_javadoccomment">         */</em>
<a name="133" href="#133">133</a>         <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> notifyListener() {
<a name="134" href="#134">134</a>             <strong class="jxr_keyword">if</strong> (listener != <strong class="jxr_keyword">null</strong>) {
<a name="135" href="#135">135</a>                 listener.update(bytesRead, contentLength, items);
<a name="136" href="#136">136</a>             }
<a name="137" href="#137">137</a>         }
<a name="138" href="#138">138</a>     }
<a name="139" href="#139">139</a> 
<a name="140" href="#140">140</a>     <em class="jxr_comment">// ----------------------------------------------------- Manifest constants</em>
<a name="141" href="#141">141</a> 
<a name="142" href="#142">142</a> 
<a name="143" href="#143">143</a>     <em class="jxr_javadoccomment">/**</em>
<a name="144" href="#144">144</a> <em class="jxr_javadoccomment">     * The Carriage Return ASCII character value.</em>
<a name="145" href="#145">145</a> <em class="jxr_javadoccomment">     */</em>
<a name="146" href="#146">146</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> byte CR = 0x0D;
<a name="147" href="#147">147</a> 
<a name="148" href="#148">148</a> 
<a name="149" href="#149">149</a>     <em class="jxr_javadoccomment">/**</em>
<a name="150" href="#150">150</a> <em class="jxr_javadoccomment">     * The Line Feed ASCII character value.</em>
<a name="151" href="#151">151</a> <em class="jxr_javadoccomment">     */</em>
<a name="152" href="#152">152</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> byte LF = 0x0A;
<a name="153" href="#153">153</a> 
<a name="154" href="#154">154</a> 
<a name="155" href="#155">155</a>     <em class="jxr_javadoccomment">/**</em>
<a name="156" href="#156">156</a> <em class="jxr_javadoccomment">     * The dash (-) ASCII character value.</em>
<a name="157" href="#157">157</a> <em class="jxr_javadoccomment">     */</em>
<a name="158" href="#158">158</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> byte DASH = 0x2D;
<a name="159" href="#159">159</a> 
<a name="160" href="#160">160</a> 
<a name="161" href="#161">161</a>     <em class="jxr_javadoccomment">/**</em>
<a name="162" href="#162">162</a> <em class="jxr_javadoccomment">     * The maximum length of &lt;code&gt;header-part&lt;/code&gt; that will be</em>
<a name="163" href="#163">163</a> <em class="jxr_javadoccomment">     * processed (10 kilobytes = 10240 bytes.).</em>
<a name="164" href="#164">164</a> <em class="jxr_javadoccomment">     */</em>
<a name="165" href="#165">165</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> HEADER_PART_SIZE_MAX = 10240;
<a name="166" href="#166">166</a> 
<a name="167" href="#167">167</a> 
<a name="168" href="#168">168</a>     <em class="jxr_javadoccomment">/**</em>
<a name="169" href="#169">169</a> <em class="jxr_javadoccomment">     * The default length of the buffer used for processing a request.</em>
<a name="170" href="#170">170</a> <em class="jxr_javadoccomment">     */</em>
<a name="171" href="#171">171</a>     <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> DEFAULT_BUFSIZE = 4096;
<a name="172" href="#172">172</a> 
<a name="173" href="#173">173</a> 
<a name="174" href="#174">174</a>     <em class="jxr_javadoccomment">/**</em>
<a name="175" href="#175">175</a> <em class="jxr_javadoccomment">     * A byte sequence that marks the end of &lt;code&gt;header-part&lt;/code&gt;</em>
<a name="176" href="#176">176</a> <em class="jxr_javadoccomment">     * (&lt;code&gt;CRLFCRLF&lt;/code&gt;).</em>
<a name="177" href="#177">177</a> <em class="jxr_javadoccomment">     */</em>
<a name="178" href="#178">178</a>     <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> byte[] HEADER_SEPARATOR = {
<a name="179" href="#179">179</a>         CR, LF, CR, LF };
<a name="180" href="#180">180</a> 
<a name="181" href="#181">181</a> 
<a name="182" href="#182">182</a>     <em class="jxr_javadoccomment">/**</em>
<a name="183" href="#183">183</a> <em class="jxr_javadoccomment">     * A byte sequence that that follows a delimiter that will be</em>
<a name="184" href="#184">184</a> <em class="jxr_javadoccomment">     * followed by an encapsulation (&lt;code&gt;CRLF&lt;/code&gt;).</em>
<a name="185" href="#185">185</a> <em class="jxr_javadoccomment">     */</em>
<a name="186" href="#186">186</a>     <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> byte[] FIELD_SEPARATOR = {
<a name="187" href="#187">187</a>         CR, LF};
<a name="188" href="#188">188</a> 
<a name="189" href="#189">189</a> 
<a name="190" href="#190">190</a>     <em class="jxr_javadoccomment">/**</em>
<a name="191" href="#191">191</a> <em class="jxr_javadoccomment">     * A byte sequence that that follows a delimiter of the last</em>
<a name="192" href="#192">192</a> <em class="jxr_javadoccomment">     * encapsulation in the stream (&lt;code&gt;--&lt;/code&gt;).</em>
<a name="193" href="#193">193</a> <em class="jxr_javadoccomment">     */</em>
<a name="194" href="#194">194</a>     <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> byte[] STREAM_TERMINATOR = {
<a name="195" href="#195">195</a>         DASH, DASH};
<a name="196" href="#196">196</a> 
<a name="197" href="#197">197</a> 
<a name="198" href="#198">198</a>     <em class="jxr_javadoccomment">/**</em>
<a name="199" href="#199">199</a> <em class="jxr_javadoccomment">     * A byte sequence that precedes a boundary (&lt;code&gt;CRLF--&lt;/code&gt;).</em>
<a name="200" href="#200">200</a> <em class="jxr_javadoccomment">     */</em>
<a name="201" href="#201">201</a>     <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> byte[] BOUNDARY_PREFIX = {
<a name="202" href="#202">202</a>         CR, LF, DASH, DASH};
<a name="203" href="#203">203</a> 
<a name="204" href="#204">204</a> 
<a name="205" href="#205">205</a>     <em class="jxr_comment">// ----------------------------------------------------------- Data members</em>
<a name="206" href="#206">206</a> 
<a name="207" href="#207">207</a> 
<a name="208" href="#208">208</a>     <em class="jxr_javadoccomment">/**</em>
<a name="209" href="#209">209</a> <em class="jxr_javadoccomment">     * The input stream from which data is read.</em>
<a name="210" href="#210">210</a> <em class="jxr_javadoccomment">     */</em>
<a name="211" href="#211">211</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> InputStream input;
<a name="212" href="#212">212</a> 
<a name="213" href="#213">213</a> 
<a name="214" href="#214">214</a>     <em class="jxr_javadoccomment">/**</em>
<a name="215" href="#215">215</a> <em class="jxr_javadoccomment">     * The length of the boundary token plus the leading &lt;code&gt;CRLF--&lt;/code&gt;.</em>
<a name="216" href="#216">216</a> <em class="jxr_javadoccomment">     */</em>
<a name="217" href="#217">217</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">int</strong> boundaryLength;
<a name="218" href="#218">218</a> 
<a name="219" href="#219">219</a> 
<a name="220" href="#220">220</a>     <em class="jxr_javadoccomment">/**</em>
<a name="221" href="#221">221</a> <em class="jxr_javadoccomment">     * The amount of data, in bytes, that must be kept in the buffer in order</em>
<a name="222" href="#222">222</a> <em class="jxr_javadoccomment">     * to detect delimiters reliably.</em>
<a name="223" href="#223">223</a> <em class="jxr_javadoccomment">     */</em>
<a name="224" href="#224">224</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">int</strong> keepRegion;
<a name="225" href="#225">225</a> 
<a name="226" href="#226">226</a> 
<a name="227" href="#227">227</a>     <em class="jxr_javadoccomment">/**</em>
<a name="228" href="#228">228</a> <em class="jxr_javadoccomment">     * The byte sequence that partitions the stream.</em>
<a name="229" href="#229">229</a> <em class="jxr_javadoccomment">     */</em>
<a name="230" href="#230">230</a>     <strong class="jxr_keyword">private</strong> byte[] boundary;
<a name="231" href="#231">231</a> 
<a name="232" href="#232">232</a> 
<a name="233" href="#233">233</a>     <em class="jxr_javadoccomment">/**</em>
<a name="234" href="#234">234</a> <em class="jxr_javadoccomment">     * The length of the buffer used for processing the request.</em>
<a name="235" href="#235">235</a> <em class="jxr_javadoccomment">     */</em>
<a name="236" href="#236">236</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> bufSize;
<a name="237" href="#237">237</a> 
<a name="238" href="#238">238</a> 
<a name="239" href="#239">239</a>     <em class="jxr_javadoccomment">/**</em>
<a name="240" href="#240">240</a> <em class="jxr_javadoccomment">     * The buffer used for processing the request.</em>
<a name="241" href="#241">241</a> <em class="jxr_javadoccomment">     */</em>
<a name="242" href="#242">242</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> byte[] buffer;
<a name="243" href="#243">243</a> 
<a name="244" href="#244">244</a> 
<a name="245" href="#245">245</a>     <em class="jxr_javadoccomment">/**</em>
<a name="246" href="#246">246</a> <em class="jxr_javadoccomment">     * The index of first valid character in the buffer.</em>