multipartstream.html

ava 项目中

<a name="326" href="#326">326</a> <em>     * @param pNotifier The notifier, which is used for calling the</em>
<a name="327" href="#327">327</a> <em>     *                  progress listener, if any.</em>
<a name="328" href="#328">328</a> <em>     *</em>
<a name="329" href="#329">329</a> <em>     * @see #MultipartStream(InputStream, byte[], ProgressNotifier)</em>
<a name="330" href="#330">330</a> <em>     */</em>
<a name="331" href="#331">331</a>     <a href="../../../../org/apache/commons/fileupload/MultipartStream.html">MultipartStream</a>(InputStream input,
<a name="332" href="#332">332</a>             byte[] boundary,
<a name="333" href="#333">333</a>             <strong>int</strong> bufSize,
<a name="334" href="#334">334</a>             ProgressNotifier pNotifier) {
<a name="335" href="#335">335</a>         <strong>this</strong>.input = input;
<a name="336" href="#336">336</a>         <strong>this</strong>.bufSize = bufSize;
<a name="337" href="#337">337</a>         <strong>this</strong>.buffer = <strong>new</strong> byte[bufSize];
<a name="338" href="#338">338</a>         <strong>this</strong>.notifier = pNotifier;
<a name="339" href="#339">339</a> 
<a name="340" href="#340">340</a>         <em class="comment">// We prepend CR/LF to the boundary to chop trailng CR/LF from</em>
<a name="341" href="#341">341</a>         <em class="comment">// body-data tokens.</em>
<a name="342" href="#342">342</a>         <strong>this</strong>.boundary = <strong>new</strong> byte[boundary.length + BOUNDARY_PREFIX.length];
<a name="343" href="#343">343</a>         <strong>this</strong>.boundaryLength = boundary.length + BOUNDARY_PREFIX.length;
<a name="344" href="#344">344</a>         <strong>this</strong>.keepRegion = boundary.length + KEEP_REGION_PAD;
<a name="345" href="#345">345</a>         System.arraycopy(BOUNDARY_PREFIX, 0, <strong>this</strong>.boundary, 0,
<a name="346" href="#346">346</a>                 BOUNDARY_PREFIX.length);
<a name="347" href="#347">347</a>         System.arraycopy(boundary, 0, <strong>this</strong>.boundary, BOUNDARY_PREFIX.length,
<a name="348" href="#348">348</a>                 boundary.length);
<a name="349" href="#349">349</a> 
<a name="350" href="#350">350</a>         head = 0;
<a name="351" href="#351">351</a>         tail = 0;
<a name="352" href="#352">352</a>     }
<a name="353" href="#353">353</a> 
<a name="354" href="#354">354</a> 
<a name="355" href="#355">355</a>     <em>/**</em>
<a name="356" href="#356">356</a> <em>     * &lt;p> Constructs a &lt;code>MultipartStream&lt;/code> with a default size buffer.</em>
<a name="357" href="#357">357</a> <em>     *</em>
<a name="358" href="#358">358</a> <em>     * @param input    The &lt;code>InputStream&lt;/code> to serve as a data source.</em>
<a name="359" href="#359">359</a> <em>     * @param boundary The token used for dividing the stream into</em>
<a name="360" href="#360">360</a> <em>     *                 &lt;code>encapsulations&lt;/code>.</em>
<a name="361" href="#361">361</a> <em>     * @param pNotifier An object for calling the progress listener, if any.</em>
<a name="362" href="#362">362</a> <em>     *</em>
<a name="363" href="#363">363</a> <em>     *</em>
<a name="364" href="#364">364</a> <em>     * @see #MultipartStream(InputStream, byte[], int, ProgressNotifier)</em>
<a name="365" href="#365">365</a> <em>     */</em>
<a name="366" href="#366">366</a>     <a href="../../../../org/apache/commons/fileupload/MultipartStream.html">MultipartStream</a>(InputStream input,
<a name="367" href="#367">367</a>             byte[] boundary,
<a name="368" href="#368">368</a>             ProgressNotifier pNotifier) {
<a name="369" href="#369">369</a>         <strong>this</strong>(input, boundary, DEFAULT_BUFSIZE, pNotifier);
<a name="370" href="#370">370</a>     }
<a name="371" href="#371">371</a> 
<a name="372" href="#372">372</a>     <em>/**</em>
<a name="373" href="#373">373</a> <em>     * &lt;p> Constructs a &lt;code>MultipartStream&lt;/code> with a default size buffer.</em>
<a name="374" href="#374">374</a> <em>     *</em>
<a name="375" href="#375">375</a> <em>     * @param input    The &lt;code>InputStream&lt;/code> to serve as a data source.</em>
<a name="376" href="#376">376</a> <em>     * @param boundary The token used for dividing the stream into</em>
<a name="377" href="#377">377</a> <em>     *                 &lt;code>encapsulations&lt;/code>.</em>
<a name="378" href="#378">378</a> <em>     *</em>
<a name="379" href="#379">379</a> <em>     * @deprecated Use {@link #MultipartStream(InputStream, byte[],</em>
<a name="380" href="#380">380</a> <em>     *  ProgressNotifier)}.</em>
<a name="381" href="#381">381</a> <em>     * @see #MultipartStream(InputStream, byte[], int, ProgressNotifier)</em>
<a name="382" href="#382">382</a> <em>     */</em>
<a name="383" href="#383">383</a>     <strong>public</strong> <a href="../../../../org/apache/commons/fileupload/MultipartStream.html">MultipartStream</a>(InputStream input,
<a name="384" href="#384">384</a>             byte[] boundary) {
<a name="385" href="#385">385</a>         <strong>this</strong>(input, boundary, DEFAULT_BUFSIZE, <strong>null</strong>);
<a name="386" href="#386">386</a>     }
<a name="387" href="#387">387</a> 
<a name="388" href="#388">388</a>     <em class="comment">// --------------------------------------------------------- Public methods</em>
<a name="389" href="#389">389</a> 
<a name="390" href="#390">390</a> 
<a name="391" href="#391">391</a>     <em>/**</em>
<a name="392" href="#392">392</a> <em>     * Retrieves the character encoding used when reading the headers of an</em>
<a name="393" href="#393">393</a> <em>     * individual part. When not specified, or &lt;code>null&lt;/code>, the platform</em>
<a name="394" href="#394">394</a> <em>     * default encoding is used.</em>
<a name="395" href="#395">395</a> 
<a name="396" href="#396">396</a> <em>     *</em>
<a name="397" href="#397">397</a> <em>     * @return The encoding used to read part headers.</em>
<a name="398" href="#398">398</a> <em>     */</em>
<a name="399" href="#399">399</a>     <strong>public</strong> String getHeaderEncoding() {
<a name="400" href="#400">400</a>         <strong>return</strong> headerEncoding;
<a name="401" href="#401">401</a>     }
<a name="402" href="#402">402</a> 
<a name="403" href="#403">403</a> 
<a name="404" href="#404">404</a>     <em>/**</em>
<a name="405" href="#405">405</a> <em>     * Specifies the character encoding to be used when reading the headers of</em>
<a name="406" href="#406">406</a> <em>     * individual parts. When not specified, or &lt;code>null&lt;/code>, the platform</em>
<a name="407" href="#407">407</a> <em>     * default encoding is used.</em>
<a name="408" href="#408">408</a> <em>     *</em>
<a name="409" href="#409">409</a> <em>     * @param encoding The encoding used to read part headers.</em>
<a name="410" href="#410">410</a> <em>     */</em>
<a name="411" href="#411">411</a>     <strong>public</strong> <strong>void</strong> setHeaderEncoding(String encoding) {
<a name="412" href="#412">412</a>         headerEncoding = encoding;
<a name="413" href="#413">413</a>     }
<a name="414" href="#414">414</a> 
<a name="415" href="#415">415</a> 
<a name="416" href="#416">416</a>     <em>/**</em>
<a name="417" href="#417">417</a> <em>     * Reads a byte from the &lt;code>buffer&lt;/code>, and refills it as</em>
<a name="418" href="#418">418</a> <em>     * necessary.</em>
<a name="419" href="#419">419</a> <em>     *</em>
<a name="420" href="#420">420</a> <em>     * @return The next byte from the input stream.</em>
<a name="421" href="#421">421</a> <em>     *</em>
<a name="422" href="#422">422</a> <em>     * @throws IOException if there is no more data available.</em>
<a name="423" href="#423">423</a> <em>     */</em>
<a name="424" href="#424">424</a>     <strong>public</strong> byte readByte()
<a name="425" href="#425">425</a>     throws IOException {
<a name="426" href="#426">426</a>         <em class="comment">// Buffer depleted ?</em>
<a name="427" href="#427">427</a>         <strong>if</strong> (head == tail) {
<a name="428" href="#428">428</a>             head = 0;
<a name="429" href="#429">429</a>             <em class="comment">// Refill.</em>
<a name="430" href="#430">430</a>             tail = input.read(buffer, head, bufSize);
<a name="431" href="#431">431</a>             <strong>if</strong> (tail == -1) {
<a name="432" href="#432">432</a>                 <em class="comment">// No more data available.</em>
<a name="433" href="#433">433</a>                 <strong>throw</strong> <strong>new</strong> IOException(<span class="string">"No more data is available"</span>);
<a name="434" href="#434">434</a>             }
<a name="435" href="#435">435</a>             notifier.noteBytesRead(tail);
<a name="436" href="#436">436</a>         }
<a name="437" href="#437">437</a>         <strong>return</strong> buffer[head++];
<a name="438" href="#438">438</a>     }
<a name="439" href="#439">439</a> 
<a name="440" href="#440">440</a> 
<a name="441" href="#441">441</a>     <em>/**</em>
<a name="442" href="#442">442</a> <em>     * Skips a &lt;code>boundary&lt;/code> token, and checks whether more</em>
<a name="443" href="#443">443</a> <em>     * &lt;code>encapsulations&lt;/code> are contained in the stream.</em>
<a name="444" href="#444">444</a> <em>     *</em>
<a name="445" href="#445">445</a> <em>     * @return &lt;code>true&lt;/code> if there are more encapsulations in</em>
<a name="446" href="#446">446</a> <em>     *         this stream; &lt;code>false&lt;/code> otherwise.</em>
<a name="447" href="#447">447</a> <em>     *</em>
<a name="448" href="#448">448</a> <em>     * @throws MalformedStreamException if the stream ends unexpecetedly or</em>
<a name="449" href="#449">449</a> <em>     *                                  fails to follow required syntax.</em>
<a name="450" href="#450">450</a> <em>     */</em>
<a name="451" href="#451">451</a>     <strong>public</strong> <strong>boolean</strong> readBoundary()
<a name="452" href="#452">452</a>             throws MalformedStreamException {
<a name="453" href="#453">453</a>         byte[] marker = <strong>new</strong> byte[2];
<a name="454" href="#454">454</a>         <strong>boolean</strong> nextChunk = false;
<a name="455" href="#455">455</a> 
<a name="456" href="#456">456</a>         head += boundaryLength;
<a name="457" href="#457">457</a>         <strong>try</strong> {
<a name="458" href="#458">458</a>             marker[0] = readByte();
<a name="459" href="#459">459</a>             <strong>if</strong> (marker[0] == LF) {
<a name="460" href="#460">460</a>                 <em class="comment">// Work around IE5 Mac bug with input type=image.</em>
<a name="461" href="#461">461</a>                 <em class="comment">// Because the boundary delimiter, not including the trailing</em>
<a name="462" href="#462">462</a>                 <em class="comment">// CRLF, must not appear within any file (RFC 2046, section</em>
<a name="463" href="#463">463</a>                 <em class="comment">// 5.1.1), we know the missing CR is due to a buggy browser</em>
<a name="464" href="#464">464</a>                 <em class="comment">// rather than a file containing something similar to a</em>
<a name="465" href="#465">465</a>                 <em class="comment">// boundary.</em>
<a name="466" href="#466">466</a>                 <strong>return</strong> <strong>true</strong>;
<a name="467" href="#467">467</a>             }
<a name="468" href="#468">468</a> 
<a name="469" href="#469">469</a>             marker[1] = readByte();
<a name="470" href="#470">470</a>             <strong>if</strong> (arrayequals(marker, STREAM_TERMINATOR, 2)) {
<a name="471" href="#471">471</a>                 nextChunk = false;
<a name="472" href="#472">472</a>             } <strong>else</strong> <strong>if</strong> (arrayequals(marker, FIELD_SEPARATOR, 2)) {
<a name="473" href="#473">473</a>                 nextChunk = <strong>true</strong>;
<a name="474" href="#474">474</a>             } <strong>else</strong> {
<a name="475" href="#475">475</a>                 <strong>throw</strong> <strong>new</strong> MalformedStreamException(
<a name="476" href="#476">476</a>                 <span class="string">"Unexpected characters follow a boundary"</span>);
<a name="477" href="#477">477</a>             }
<a name="478" href="#478">478</a>         } <strong>catch</strong> (IOException e) {
<a name="479" href="#479">479</a>             <strong>throw</strong> <strong>new</strong> MalformedStreamException(<span class="string">"Stream ended unexpectedly"</span>);
<a name="480" href="#480">480</a>         }
<a name="481" href="#481">481</a>         <strong>return</strong> nextChunk;
<a name="482" href="#482">482</a>     }
<a name="483" href="#483">483</a> 
<a name="484" href="#484">484</a> 
<a name="485" href="#485">485</a>     <em>/**</em>
<a name="486" href="#486">486</a> <em>     * &lt;p>Changes the boundary token used for partitioning the stream.</em>
<a name="487" href="#487">487</a> <em>     *</em>
<a name="488" href="#488">488</a> <em>     * &lt;p>This method allows single pass processing of nested multipart</em>
<a name="489" href="#489">489</a> <em>     * streams.</em>
<a name="490" href="#490">490</a> <em>     *</em>
<a name="491" href="#491">491</a> <em>     * &lt;p>The boundary token of the nested stream is &lt;code>required&lt;/code></em>
<a name="492" href="#492">492</a> <em>     * to be of the same length as the boundary token in parent stream.</em>