multipartstream.html

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<a name="160" href="#160">160</a> 
<a name="161" href="#161">161</a> 
<a name="162" href="#162">162</a>     <em>/**<em>*</em></em>
<a name="163" href="#163">163</a> <em>     * The input stream from which data is read.</em>
<a name="164" href="#164">164</a> <em>     */</em>
<a name="165" href="#165">165</a>     <strong>private</strong> InputStream input;
<a name="166" href="#166">166</a> 
<a name="167" href="#167">167</a> 
<a name="168" href="#168">168</a>     <em>/**<em>*</em></em>
<a name="169" href="#169">169</a> <em>     * The length of the boundary token plus the leading &lt;code>CRLF--&lt;/code>.</em>
<a name="170" href="#170">170</a> <em>     */</em>
<a name="171" href="#171">171</a>     <strong>private</strong> <strong>int</strong> boundaryLength;
<a name="172" href="#172">172</a> 
<a name="173" href="#173">173</a> 
<a name="174" href="#174">174</a>     <em>/**<em>*</em></em>
<a name="175" href="#175">175</a> <em>     * The amount of data, in bytes, that must be kept in the buffer in order</em>
<a name="176" href="#176">176</a> <em>     * to detect delimiters reliably.</em>
<a name="177" href="#177">177</a> <em>     */</em>
<a name="178" href="#178">178</a>     <strong>private</strong> <strong>int</strong> keepRegion;
<a name="179" href="#179">179</a> 
<a name="180" href="#180">180</a> 
<a name="181" href="#181">181</a>     <em>/**<em>*</em></em>
<a name="182" href="#182">182</a> <em>     * The byte sequence that partitions the stream.</em>
<a name="183" href="#183">183</a> <em>     */</em>
<a name="184" href="#184">184</a>     <strong>private</strong> byte[] boundary;
<a name="185" href="#185">185</a> 
<a name="186" href="#186">186</a> 
<a name="187" href="#187">187</a>     <em>/**<em>*</em></em>
<a name="188" href="#188">188</a> <em>     * The length of the buffer used for processing the request.</em>
<a name="189" href="#189">189</a> <em>     */</em>
<a name="190" href="#190">190</a>     <strong>private</strong> <strong>int</strong> bufSize;
<a name="191" href="#191">191</a> 
<a name="192" href="#192">192</a> 
<a name="193" href="#193">193</a>     <em>/**<em>*</em></em>
<a name="194" href="#194">194</a> <em>     * The buffer used for processing the request.</em>
<a name="195" href="#195">195</a> <em>     */</em>
<a name="196" href="#196">196</a>     <strong>private</strong> byte[] buffer;
<a name="197" href="#197">197</a> 
<a name="198" href="#198">198</a> 
<a name="199" href="#199">199</a>     <em>/**<em>*</em></em>
<a name="200" href="#200">200</a> <em>     * The index of first valid character in the buffer.</em>
<a name="201" href="#201">201</a> <em>     * &lt;br></em>
<a name="202" href="#202">202</a> <em>     * 0 &lt;= head &lt; bufSize</em>
<a name="203" href="#203">203</a> <em>     */</em>
<a name="204" href="#204">204</a>     <strong>private</strong> <strong>int</strong> head;
<a name="205" href="#205">205</a> 
<a name="206" href="#206">206</a> 
<a name="207" href="#207">207</a>     <em>/**<em>*</em></em>
<a name="208" href="#208">208</a> <em>     * The index of last valid characer in the buffer + 1.</em>
<a name="209" href="#209">209</a> <em>     * &lt;br></em>
<a name="210" href="#210">210</a> <em>     * 0 &lt;= tail &lt;= bufSize</em>
<a name="211" href="#211">211</a> <em>     */</em>
<a name="212" href="#212">212</a>     <strong>private</strong> <strong>int</strong> tail;
<a name="213" href="#213">213</a> 
<a name="214" href="#214">214</a> 
<a name="215" href="#215">215</a>     <em>/**<em>*</em></em>
<a name="216" href="#216">216</a> <em>     * The content encoding to use when reading headers.</em>
<a name="217" href="#217">217</a> <em>     */</em>
<a name="218" href="#218">218</a>     <strong>private</strong> String headerEncoding;
<a name="219" href="#219">219</a> 
<a name="220" href="#220">220</a> 
<a name="221" href="#221">221</a>     <em class="comment">// ----------------------------------------------------------- Constructors</em>
<a name="222" href="#222">222</a> 
<a name="223" href="#223">223</a> 
<a name="224" href="#224">224</a>     <em>/**<em>*</em></em>
<a name="225" href="#225">225</a> <em>     * Default constructor.</em>
<a name="226" href="#226">226</a> <em>     *</em>
<a name="227" href="#227">227</a> <em>     * @see #MultipartStream(InputStream, byte[], int)</em>
<a name="228" href="#228">228</a> <em>     * @see #MultipartStream(InputStream, byte[])</em>
<a name="229" href="#229">229</a> <em>     *</em>
<a name="230" href="#230">230</a> <em>     */</em>
<a name="231" href="#231">231</a>     <strong>public</strong> <a href="../../../../org/apache/commons/fileupload/MultipartStream.html">MultipartStream</a>() {
<a name="232" href="#232">232</a>     }
<a name="233" href="#233">233</a> 
<a name="234" href="#234">234</a> 
<a name="235" href="#235">235</a>     <em>/**<em>*</em></em>
<a name="236" href="#236">236</a> <em>     * &lt;p> Constructs a &lt;code>MultipartStream&lt;/code> with a custom size buffer.</em>
<a name="237" href="#237">237</a> <em>     *</em>
<a name="238" href="#238">238</a> <em>     * &lt;p> Note that the buffer must be at least big enough to contain the</em>
<a name="239" href="#239">239</a> <em>     * boundary string, plus 4 characters for CR/LF and double dash, plus at</em>
<a name="240" href="#240">240</a> <em>     * least one byte of data.  Too small a buffer size setting will degrade</em>
<a name="241" href="#241">241</a> <em>     * performance.</em>
<a name="242" href="#242">242</a> <em>     *</em>
<a name="243" href="#243">243</a> <em>     * @param input    The &lt;code>InputStream&lt;/code> to serve as a data source.</em>
<a name="244" href="#244">244</a> <em>     * @param boundary The token used for dividing the stream into</em>
<a name="245" href="#245">245</a> <em>     *                 &lt;code>encapsulations&lt;/code>.</em>
<a name="246" href="#246">246</a> <em>     * @param bufSize  The size of the buffer to be used, in bytes.</em>
<a name="247" href="#247">247</a> <em>     *</em>
<a name="248" href="#248">248</a> <em>     *</em>
<a name="249" href="#249">249</a> <em>     * @see #MultipartStream()</em>
<a name="250" href="#250">250</a> <em>     * @see #MultipartStream(InputStream, byte[])</em>
<a name="251" href="#251">251</a> <em>     *</em>
<a name="252" href="#252">252</a> <em>     */</em>
<a name="253" href="#253">253</a>     <strong>public</strong> <a href="../../../../org/apache/commons/fileupload/MultipartStream.html">MultipartStream</a>(InputStream input,
<a name="254" href="#254">254</a>                            byte[] boundary,
<a name="255" href="#255">255</a>                            <strong>int</strong> bufSize) {
<a name="256" href="#256">256</a>         <strong>this</strong>.input = input;
<a name="257" href="#257">257</a>         <strong>this</strong>.bufSize = bufSize;
<a name="258" href="#258">258</a>         <strong>this</strong>.buffer = <strong>new</strong> byte[bufSize];
<a name="259" href="#259">259</a> 
<a name="260" href="#260">260</a>         <em class="comment">// We prepend CR/LF to the boundary to chop trailng CR/LF from</em>
<a name="261" href="#261">261</a>         <em class="comment">// body-data tokens.</em>
<a name="262" href="#262">262</a>         <strong>this</strong>.boundary = <strong>new</strong> byte[boundary.length + BOUNDARY_PREFIX.length];
<a name="263" href="#263">263</a>         <strong>this</strong>.boundaryLength = boundary.length + BOUNDARY_PREFIX.length;
<a name="264" href="#264">264</a>         <strong>this</strong>.keepRegion = boundary.length + KEEP_REGION_PAD;
<a name="265" href="#265">265</a>         System.arraycopy(BOUNDARY_PREFIX, 0, <strong>this</strong>.boundary, 0,
<a name="266" href="#266">266</a>                 BOUNDARY_PREFIX.length);
<a name="267" href="#267">267</a>         System.arraycopy(boundary, 0, <strong>this</strong>.boundary, BOUNDARY_PREFIX.length,
<a name="268" href="#268">268</a>                 boundary.length);
<a name="269" href="#269">269</a> 
<a name="270" href="#270">270</a>         head = 0;
<a name="271" href="#271">271</a>         tail = 0;
<a name="272" href="#272">272</a>     }
<a name="273" href="#273">273</a> 
<a name="274" href="#274">274</a> 
<a name="275" href="#275">275</a>     <em>/**<em>*</em></em>
<a name="276" href="#276">276</a> <em>     * &lt;p> Constructs a &lt;code>MultipartStream&lt;/code> with a default size buffer.</em>
<a name="277" href="#277">277</a> <em>     *</em>
<a name="278" href="#278">278</a> <em>     * @param input    The &lt;code>InputStream&lt;/code> to serve as a data source.</em>
<a name="279" href="#279">279</a> <em>     * @param boundary The token used for dividing the stream into</em>
<a name="280" href="#280">280</a> <em>     *                 &lt;code>encapsulations&lt;/code>.</em>
<a name="281" href="#281">281</a> <em>     *</em>
<a name="282" href="#282">282</a> <em>     * @throws IOException when an error occurs.</em>
<a name="283" href="#283">283</a> <em>     *</em>
<a name="284" href="#284">284</a> <em>     * @see #MultipartStream()</em>
<a name="285" href="#285">285</a> <em>     * @see #MultipartStream(InputStream, byte[], int)</em>
<a name="286" href="#286">286</a> <em>     *</em>
<a name="287" href="#287">287</a> <em>     */</em>
<a name="288" href="#288">288</a>     <strong>public</strong> <a href="../../../../org/apache/commons/fileupload/MultipartStream.html">MultipartStream</a>(InputStream input,
<a name="289" href="#289">289</a>                            byte[] boundary)
<a name="290" href="#290">290</a>         throws IOException {
<a name="291" href="#291">291</a>         <strong>this</strong>(input, boundary, DEFAULT_BUFSIZE);
<a name="292" href="#292">292</a>     }
<a name="293" href="#293">293</a> 
<a name="294" href="#294">294</a> 
<a name="295" href="#295">295</a>     <em class="comment">// --------------------------------------------------------- Public methods</em>
<a name="296" href="#296">296</a> 
<a name="297" href="#297">297</a> 
<a name="298" href="#298">298</a>     <em>/**<em>*</em></em>
<a name="299" href="#299">299</a> <em>     * Retrieves the character encoding used when reading the headers of an</em>
<a name="300" href="#300">300</a> <em>     * individual part. When not specified, or &lt;code>null&lt;/code>, the platform</em>
<a name="301" href="#301">301</a> <em>     * default encoding is used.</em>
<a name="302" href="#302">302</a> 
<a name="303" href="#303">303</a> <em>     *</em>
<a name="304" href="#304">304</a> <em>     * @return The encoding used to read part headers.</em>
<a name="305" href="#305">305</a> <em>     */</em>
<a name="306" href="#306">306</a>     <strong>public</strong> String getHeaderEncoding() {
<a name="307" href="#307">307</a>         <strong>return</strong> headerEncoding;
<a name="308" href="#308">308</a>     }
<a name="309" href="#309">309</a> 
<a name="310" href="#310">310</a> 
<a name="311" href="#311">311</a>     <em>/**<em>*</em></em>
<a name="312" href="#312">312</a> <em>     * Specifies the character encoding to be used when reading the headers of</em>
<a name="313" href="#313">313</a> <em>     * individual parts. When not specified, or &lt;code>null&lt;/code>, the platform</em>
<a name="314" href="#314">314</a> <em>     * default encoding is used.</em>
<a name="315" href="#315">315</a> <em>     *</em>
<a name="316" href="#316">316</a> <em>     * @param encoding The encoding used to read part headers.</em>
<a name="317" href="#317">317</a> <em>     */</em>
<a name="318" href="#318">318</a>     <strong>public</strong> <strong>void</strong> setHeaderEncoding(String encoding) {
<a name="319" href="#319">319</a>         headerEncoding = encoding;
<a name="320" href="#320">320</a>     }
<a name="321" href="#321">321</a> 
<a name="322" href="#322">322</a> 
<a name="323" href="#323">323</a>     <em>/**<em>*</em></em>
<a name="324" href="#324">324</a> <em>     * Reads a byte from the &lt;code>buffer&lt;/code>, and refills it as</em>
<a name="325" href="#325">325</a> <em>     * necessary.</em>
<a name="326" href="#326">326</a> <em>     *</em>
<a name="327" href="#327">327</a> <em>     * @return The next byte from the input stream.</em>