fileuploadbase.html

ava 项目中

<a name="302" href="#302">302</a>         <strong>return</strong> parseRequest(<strong>new</strong> <a href="../../../../org/apache/commons/fileupload/servlet/ServletRequestContext.html">ServletRequestContext</a>(req));
<a name="303" href="#303">303</a>     }
<a name="304" href="#304">304</a> 
<a name="305" href="#305">305</a>     <em>/**</em>
<a name="306" href="#306">306</a> <em>     * Processes an &lt;a href="<a href="http://www.ietf.org/rfc/rfc1867.txt" target="alexandria_uri">http://www.ietf.org/rfc/rfc1867.txt</a>">RFC 1867&lt;/a></em>
<a name="307" href="#307">307</a> <em>     * compliant &lt;code>multipart/form-data&lt;/code> stream.</em>
<a name="308" href="#308">308</a> <em>     *</em>
<a name="309" href="#309">309</a> <em>     * @param ctx The context for the request to be parsed.</em>
<a name="310" href="#310">310</a> <em>     *</em>
<a name="311" href="#311">311</a> <em>     * @return An iterator to instances of &lt;code>FileItemStream&lt;/code></em>
<a name="312" href="#312">312</a> <em>     *         parsed from the request, in the order that they were</em>
<a name="313" href="#313">313</a> <em>     *         transmitted.</em>
<a name="314" href="#314">314</a> <em>     *</em>
<a name="315" href="#315">315</a> <em>     * @throws FileUploadException if there are problems reading/parsing</em>
<a name="316" href="#316">316</a> <em>     *                             the request or storing files.</em>
<a name="317" href="#317">317</a> <em>     * @throws IOException An I/O error occurred. This may be a network</em>
<a name="318" href="#318">318</a> <em>     *   error while communicating with the client or a problem while</em>
<a name="319" href="#319">319</a> <em>     *   storing the uploaded content.</em>
<a name="320" href="#320">320</a> <em>     */</em>
<a name="321" href="#321">321</a>     <strong>public</strong> <a href="../../../../org/apache/commons/fileupload/FileItemIterator.html">FileItemIterator</a> getItemIterator(<a href="../../../../org/apache/commons/fileupload/RequestContext.html">RequestContext</a> ctx)
<a name="322" href="#322">322</a>     throws FileUploadException, IOException {
<a name="323" href="#323">323</a>         <strong>return</strong> <strong>new</strong> FileItemIteratorImpl(ctx);
<a name="324" href="#324">324</a>     }
<a name="325" href="#325">325</a> 
<a name="326" href="#326">326</a>     <em>/**</em>
<a name="327" href="#327">327</a> <em>     * Processes an &lt;a href="<a href="http://www.ietf.org/rfc/rfc1867.txt" target="alexandria_uri">http://www.ietf.org/rfc/rfc1867.txt</a>">RFC 1867&lt;/a></em>
<a name="328" href="#328">328</a> <em>     * compliant &lt;code>multipart/form-data&lt;/code> stream.</em>
<a name="329" href="#329">329</a> <em>     *</em>
<a name="330" href="#330">330</a> <em>     * @param ctx The context for the request to be parsed.</em>
<a name="331" href="#331">331</a> <em>     *</em>
<a name="332" href="#332">332</a> <em>     * @return A list of &lt;code>FileItem&lt;/code> instances parsed from the</em>
<a name="333" href="#333">333</a> <em>     *         request, in the order that they were transmitted.</em>
<a name="334" href="#334">334</a> <em>     *</em>
<a name="335" href="#335">335</a> <em>     * @throws FileUploadException if there are problems reading/parsing</em>
<a name="336" href="#336">336</a> <em>     *                             the request or storing files.</em>
<a name="337" href="#337">337</a> <em>     */</em>
<a name="338" href="#338">338</a>     <strong>public</strong> List <em class="comment">/*<em class="comment"> <a href="../../../../org/apache/commons/fileupload/FileItem.html">FileItem</a> */</em> parseRequest(<a href="../../../../org/apache/commons/fileupload/RequestContext.html">RequestContext</a> ctx)</em>
<a name="339" href="#339">339</a>             throws <a href="../../../../org/apache/commons/fileupload/FileUploadException.html">FileUploadException</a> {
<a name="340" href="#340">340</a>         <strong>try</strong> {
<a name="341" href="#341">341</a>             <a href="../../../../org/apache/commons/fileupload/FileItemIterator.html">FileItemIterator</a> iter = getItemIterator(ctx);
<a name="342" href="#342">342</a>             List items = <strong>new</strong> ArrayList();
<a name="343" href="#343">343</a>             <a href="../../../../org/apache/commons/fileupload/FileItemFactory.html">FileItemFactory</a> fac = getFileItemFactory();
<a name="344" href="#344">344</a>             <strong>if</strong> (fac == <strong>null</strong>) {
<a name="345" href="#345">345</a>                 <strong>throw</strong> <strong>new</strong> NullPointerException(
<a name="346" href="#346">346</a>                     <span class="string">"No FileItemFactory has been set."</span>);
<a name="347" href="#347">347</a>             }
<a name="348" href="#348">348</a>             <strong>while</strong> (iter.hasNext()) {
<a name="349" href="#349">349</a>                 <a href="../../../../org/apache/commons/fileupload/FileItemStream.html">FileItemStream</a> item = iter.next();
<a name="350" href="#350">350</a>                 <a href="../../../../org/apache/commons/fileupload/FileItem.html">FileItem</a> fileItem = fac.createItem(item.getFieldName(),
<a name="351" href="#351">351</a>                         item.getContentType(), item.isFormField(),
<a name="352" href="#352">352</a>                         item.getName());
<a name="353" href="#353">353</a>                 <strong>try</strong> {
<a name="354" href="#354">354</a>                     Streams.copy(item.openStream(), fileItem.getOutputStream(),
<a name="355" href="#355">355</a>                             <strong>true</strong>);
<a name="356" href="#356">356</a>                 } <strong>catch</strong> (FileUploadIOException e) {
<a name="357" href="#357">357</a>                     <strong>throw</strong> (FileUploadException) e.getCause();
<a name="358" href="#358">358</a>                 } <strong>catch</strong> (IOException e) {
<a name="359" href="#359">359</a>                     <strong>throw</strong> <strong>new</strong> IOFileUploadException(
<a name="360" href="#360">360</a>                             <span class="string">"Processing of "</span> + MULTIPART_FORM_DATA
<a name="361" href="#361">361</a>                             + <span class="string">" request failed. "</span> + e.getMessage(), e);
<a name="362" href="#362">362</a>                 }
<a name="363" href="#363">363</a>                 items.add(fileItem);
<a name="364" href="#364">364</a>             }
<a name="365" href="#365">365</a>             <strong>return</strong> items;
<a name="366" href="#366">366</a>         } <strong>catch</strong> (FileUploadIOException e) {
<a name="367" href="#367">367</a>             <strong>throw</strong> (FileUploadException) e.getCause();
<a name="368" href="#368">368</a>         } <strong>catch</strong> (IOException e) {
<a name="369" href="#369">369</a>             <strong>throw</strong> <strong>new</strong> <a href="../../../../org/apache/commons/fileupload/FileUploadException.html">FileUploadException</a>(e.getMessage(), e);
<a name="370" href="#370">370</a>         }
<a name="371" href="#371">371</a>     }
<a name="372" href="#372">372</a> 
<a name="373" href="#373">373</a> 
<a name="374" href="#374">374</a>     <em class="comment">// ------------------------------------------------------ Protected methods</em>
<a name="375" href="#375">375</a> 
<a name="376" href="#376">376</a> 
<a name="377" href="#377">377</a>     <em>/**</em>
<a name="378" href="#378">378</a> <em>     * Retrieves the boundary from the &lt;code>Content-type&lt;/code> header.</em>
<a name="379" href="#379">379</a> <em>     *</em>
<a name="380" href="#380">380</a> <em>     * @param contentType The value of the content type header from which to</em>
<a name="381" href="#381">381</a> <em>     *                    extract the boundary value.</em>
<a name="382" href="#382">382</a> <em>     *</em>
<a name="383" href="#383">383</a> <em>     * @return The boundary, as a byte array.</em>
<a name="384" href="#384">384</a> <em>     */</em>
<a name="385" href="#385">385</a>     <strong>protected</strong> byte[] getBoundary(String contentType) {
<a name="386" href="#386">386</a>         <a href="../../../../org/apache/commons/fileupload/ParameterParser.html">ParameterParser</a> parser = <strong>new</strong> <a href="../../../../org/apache/commons/fileupload/ParameterParser.html">ParameterParser</a>();
<a name="387" href="#387">387</a>         parser.setLowerCaseNames(<strong>true</strong>);
<a name="388" href="#388">388</a>         <em class="comment">// Parameter parser can handle null input</em>
<a name="389" href="#389">389</a>         Map params = parser.parse(contentType, ';');
<a name="390" href="#390">390</a>         String boundaryStr = (String) params.get(<span class="string">"boundary"</span>);
<a name="391" href="#391">391</a> 
<a name="392" href="#392">392</a>         <strong>if</strong> (boundaryStr == <strong>null</strong>) {
<a name="393" href="#393">393</a>             <strong>return</strong> <strong>null</strong>;
<a name="394" href="#394">394</a>         }
<a name="395" href="#395">395</a>         byte[] boundary;
<a name="396" href="#396">396</a>         <strong>try</strong> {
<a name="397" href="#397">397</a>             boundary = boundaryStr.getBytes(<span class="string">"ISO-8859-1"</span>);
<a name="398" href="#398">398</a>         } <strong>catch</strong> (UnsupportedEncodingException e) {
<a name="399" href="#399">399</a>             boundary = boundaryStr.getBytes();
<a name="400" href="#400">400</a>         }
<a name="401" href="#401">401</a>         <strong>return</strong> boundary;
<a name="402" href="#402">402</a>     }
<a name="403" href="#403">403</a> 
<a name="404" href="#404">404</a> 
<a name="405" href="#405">405</a>     <em>/**</em>
<a name="406" href="#406">406</a> <em>     * Retrieves the file name from the &lt;code>Content-disposition&lt;/code></em>
<a name="407" href="#407">407</a> <em>     * header.</em>
<a name="408" href="#408">408</a> <em>     *</em>
<a name="409" href="#409">409</a> <em>     * @param headers A &lt;code>Map&lt;/code> containing the HTTP request headers.</em>
<a name="410" href="#410">410</a> <em>     *</em>
<a name="411" href="#411">411</a> <em>     * @return The file name for the current &lt;code>encapsulation&lt;/code>.</em>
<a name="412" href="#412">412</a> <em>     */</em>
<a name="413" href="#413">413</a>     <strong>protected</strong> String getFileName(Map <em class="comment">/*<em class="comment"> String, String */</em> headers) {</em>
<a name="414" href="#414">414</a>         String fileName = <strong>null</strong>;
<a name="415" href="#415">415</a>         String cd = getHeader(headers, CONTENT_DISPOSITION);
<a name="416" href="#416">416</a>         <strong>if</strong> (cd != <strong>null</strong>) {
<a name="417" href="#417">417</a>             String cdl = cd.toLowerCase();
<a name="418" href="#418">418</a>             <strong>if</strong> (cdl.startsWith(FORM_DATA) || cdl.startsWith(ATTACHMENT)) {
<a name="419" href="#419">419</a>                 <a href="../../../../org/apache/commons/fileupload/ParameterParser.html">ParameterParser</a> parser = <strong>new</strong> <a href="../../../../org/apache/commons/fileupload/ParameterParser.html">ParameterParser</a>();
<a name="420" href="#420">420</a>                 parser.setLowerCaseNames(<strong>true</strong>);
<a name="421" href="#421">421</a>                 <em class="comment">// Parameter parser can handle null input</em>
<a name="422" href="#422">422</a>                 Map params = parser.parse(cd, ';');
<a name="423" href="#423">423</a>                 <strong>if</strong> (params.containsKey(<span class="string">"filename"</span>)) {
<a name="424" href="#424">424</a>                     fileName = (String) params.get(<span class="string">"filename"</span>);
<a name="425" href="#425">425</a>                     <strong>if</strong> (fileName != <strong>null</strong>) {
<a name="426" href="#426">426</a>                         fileName = fileName.trim();
<a name="427" href="#427">427</a>                     } <strong>else</strong> {
<a name="428" href="#428">428</a>                         <em class="comment">// Even if there is no value, the parameter is present,</em>
<a name="429" href="#429">429</a>                         <em class="comment">// so we return an empty file name rather than no file</em>
<a name="430" href="#430">430</a>                         <em class="comment">// name.</em>
<a name="431" href="#431">431</a>                         fileName = <span class="string">""</span>;
<a name="432" href="#432">432</a>                     }
<a name="433" href="#433">433</a>                 }
<a name="434" href="#434">434</a>             }
<a name="435" href="#435">435</a>         }
<a name="436" href="#436">436</a>         <strong>return</strong> fileName;
<a name="437" href="#437">437</a>     }
<a name="438" href="#438">438</a> 
<a name="439" href="#439">439</a> 
<a name="440" href="#440">440</a>     <em>/**</em>
<a name="441" href="#441">441</a> <em>     * Retrieves the field name from the &lt;code>Content-disposition&lt;/code></em>
<a name="442" href="#442">442</a> <em>     * header.</em>
<a name="443" href="#443">443</a> <em>     *</em>
<a name="444" href="#444">444</a> <em>     * @param headers A &lt;code>Map&lt;/code> containing the HTTP request headers.</em>
<a name="445" href="#445">445</a> <em>     *</em>
<a name="446" href="#446">446</a> <em>     * @return The field name for the current &lt;code>encapsulation&lt;/code>.</em>
<a name="447" href="#447">447</a> <em>     */</em>
<a name="448" href="#448">448</a>     <strong>protected</strong> String getFieldName(Map <em class="comment">/*<em class="comment"> String, String */</em> headers) {</em>
<a name="449" href="#449">449</a>         String fieldName = <strong>null</strong>;
<a name="450" href="#450">450</a>         String cd = getHeader(headers, CONTENT_DISPOSITION);
<a name="451" href="#451">451</a>         <strong>if</strong> (cd != <strong>null</strong> &amp;&amp; cd.toLowerCase().startsWith(FORM_DATA)) {
<a name="452" href="#452">452</a> 
<a name="453" href="#453">453</a>             <a href="../../../../org/apache/commons/fileupload/ParameterParser.html">ParameterParser</a> parser = <strong>new</strong> <a href="../../../../org/apache/commons/fileupload/ParameterParser.html">ParameterParser</a>();
<a name="454" href="#454">454</a>             parser.setLowerCaseNames(<strong>true</strong>);
<a name="455" href="#455">455</a>             <em class="comment">// Parameter parser can handle null input</em>
<a name="456" href="#456">456</a>             Map params = parser.parse(cd, ';');