httpconnection.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="314" href="#314">314</a> 
<a name="315" href="#315">315</a>     <em>/**<em>*</em></em>
<a name="316" href="#316">316</a> <em>     * Returns the proxy host.</em>
<a name="317" href="#317">317</a> <em>     *</em>
<a name="318" href="#318">318</a> <em>     * @return the proxy host.</em>
<a name="319" href="#319">319</a> <em>     */</em>
<a name="320" href="#320">320</a>     <strong>public</strong> String getProxyHost() {
<a name="321" href="#321">321</a>         <strong>return</strong> proxyHostName;
<a name="322" href="#322">322</a>     }
<a name="323" href="#323">323</a> 
<a name="324" href="#324">324</a>     <em>/**<em>*</em></em>
<a name="325" href="#325">325</a> <em>     * Sets the host to proxy through.</em>
<a name="326" href="#326">326</a> <em>     *</em>
<a name="327" href="#327">327</a> <em>     * @param host the host to proxy through.</em>
<a name="328" href="#328">328</a> <em>     * </em>
<a name="329" href="#329">329</a> <em>     * @throws IllegalStateException if the connection is already open</em>
<a name="330" href="#330">330</a> <em>     */</em>
<a name="331" href="#331">331</a>     <strong>public</strong> <strong>void</strong> setProxyHost(String host) throws IllegalStateException {
<a name="332" href="#332">332</a>         assertNotOpen();
<a name="333" href="#333">333</a>         proxyHostName = host;
<a name="334" href="#334">334</a>     }
<a name="335" href="#335">335</a> 
<a name="336" href="#336">336</a>     <em>/**<em>*</em></em>
<a name="337" href="#337">337</a> <em>     * Returns the port of the proxy host.</em>
<a name="338" href="#338">338</a> <em>     *</em>
<a name="339" href="#339">339</a> <em>     * @return the proxy port.</em>
<a name="340" href="#340">340</a> <em>     */</em>
<a name="341" href="#341">341</a>     <strong>public</strong> <strong>int</strong> getProxyPort() {
<a name="342" href="#342">342</a>         <strong>return</strong> proxyPortNumber;
<a name="343" href="#343">343</a>     }
<a name="344" href="#344">344</a> 
<a name="345" href="#345">345</a>     <em>/**<em>*</em></em>
<a name="346" href="#346">346</a> <em>     * Sets the port of the host to proxy through.</em>
<a name="347" href="#347">347</a> <em>     *</em>
<a name="348" href="#348">348</a> <em>     * @param port the port of the host to proxy through.</em>
<a name="349" href="#349">349</a> <em>     * </em>
<a name="350" href="#350">350</a> <em>     * @throws IllegalStateException if the connection is already open</em>
<a name="351" href="#351">351</a> <em>     */</em>
<a name="352" href="#352">352</a>     <strong>public</strong> <strong>void</strong> setProxyPort(<strong>int</strong> port) throws IllegalStateException {
<a name="353" href="#353">353</a>         assertNotOpen();
<a name="354" href="#354">354</a>         proxyPortNumber = port;
<a name="355" href="#355">355</a>     }
<a name="356" href="#356">356</a> 
<a name="357" href="#357">357</a>     <em>/**<em>*</em></em>
<a name="358" href="#358">358</a> <em>     * Returns &lt;tt>true&lt;/tt> if the connection is established over </em>
<a name="359" href="#359">359</a> <em>     * a secure protocol.</em>
<a name="360" href="#360">360</a> <em>     *</em>
<a name="361" href="#361">361</a> <em>     * @return &lt;tt>true&lt;/tt> if connected over a secure protocol.</em>
<a name="362" href="#362">362</a> <em>     */</em>
<a name="363" href="#363">363</a>     <strong>public</strong> <strong>boolean</strong> isSecure() {
<a name="364" href="#364">364</a>         <strong>return</strong> protocolInUse.isSecure();
<a name="365" href="#365">365</a>     }
<a name="366" href="#366">366</a> 
<a name="367" href="#367">367</a>     <em>/**<em>*</em></em>
<a name="368" href="#368">368</a> <em>     * Returns the protocol used to establish the connection.</em>
<a name="369" href="#369">369</a> <em>     * @return The protocol</em>
<a name="370" href="#370">370</a> <em>     */</em>
<a name="371" href="#371">371</a>     <strong>public</strong> Protocol getProtocol() {
<a name="372" href="#372">372</a>         <strong>return</strong> protocolInUse;
<a name="373" href="#373">373</a>     }
<a name="374" href="#374">374</a> 
<a name="375" href="#375">375</a>     <em>/**<em>*</em></em>
<a name="376" href="#376">376</a> <em>     * Sets the protocol used to establish the connection</em>
<a name="377" href="#377">377</a> <em>     * </em>
<a name="378" href="#378">378</a> <em>     * @param protocol The protocol to use.</em>
<a name="379" href="#379">379</a> <em>     * </em>
<a name="380" href="#380">380</a> <em>     * @throws IllegalStateException if the connection is already open</em>
<a name="381" href="#381">381</a> <em>     */</em>
<a name="382" href="#382">382</a>     <strong>public</strong> <strong>void</strong> setProtocol(Protocol protocol) {
<a name="383" href="#383">383</a>         assertNotOpen();
<a name="384" href="#384">384</a> 
<a name="385" href="#385">385</a>         <strong>if</strong> (protocol == <strong>null</strong>) {
<a name="386" href="#386">386</a>             <strong>throw</strong> <strong>new</strong> IllegalArgumentException(<span class="string">"protocol is null"</span>);
<a name="387" href="#387">387</a>         }
<a name="388" href="#388">388</a> 
<a name="389" href="#389">389</a>         protocolInUse = protocol;
<a name="390" href="#390">390</a> 
<a name="391" href="#391">391</a>     }
<a name="392" href="#392">392</a> 
<a name="393" href="#393">393</a>     <em>/**<em>*</em></em>
<a name="394" href="#394">394</a> <em>     * Return the local address used when creating the connection.</em>
<a name="395" href="#395">395</a> <em>     * If &lt;tt>null&lt;/tt>, the default address is used.</em>
<a name="396" href="#396">396</a> <em>     * </em>
<a name="397" href="#397">397</a> <em>     * @return InetAddress the local address to be used when creating Sockets</em>
<a name="398" href="#398">398</a> <em>     */</em>
<a name="399" href="#399">399</a>     <strong>public</strong> InetAddress getLocalAddress() {
<a name="400" href="#400">400</a>         <strong>return</strong> <strong>this</strong>.localAddress;
<a name="401" href="#401">401</a>     }
<a name="402" href="#402">402</a>     
<a name="403" href="#403">403</a>     <em>/**<em>*</em></em>
<a name="404" href="#404">404</a> <em>     * Set the local address used when creating the connection.</em>
<a name="405" href="#405">405</a> <em>     * If unset or &lt;tt>null&lt;/tt>, the default address is used.</em>
<a name="406" href="#406">406</a> <em>     * </em>
<a name="407" href="#407">407</a> <em>     * @param localAddress the local address to use</em>
<a name="408" href="#408">408</a> <em>     */</em>
<a name="409" href="#409">409</a>     <strong>public</strong> <strong>void</strong> setLocalAddress(InetAddress localAddress) {
<a name="410" href="#410">410</a>         assertNotOpen();
<a name="411" href="#411">411</a>         <strong>this</strong>.localAddress = localAddress;
<a name="412" href="#412">412</a>     }
<a name="413" href="#413">413</a> 
<a name="414" href="#414">414</a>     <em>/**<em>*</em></em>
<a name="415" href="#415">415</a> <em>     * Tests if the connection is open. </em>
<a name="416" href="#416">416</a> <em>     *</em>
<a name="417" href="#417">417</a> <em>     * @return &lt;code>true&lt;/code> if the connection is open</em>
<a name="418" href="#418">418</a> <em>     */</em>
<a name="419" href="#419">419</a>     <strong>public</strong> <strong>boolean</strong> isOpen() {
<a name="420" href="#420">420</a>         <strong>return</strong> isOpen;
<a name="421" href="#421">421</a>     }
<a name="422" href="#422">422</a> 
<a name="423" href="#423">423</a>     <em>/**<em>*</em></em>
<a name="424" href="#424">424</a> <em>     * Closes the connection if stale.</em>
<a name="425" href="#425">425</a> <em>     * </em>
<a name="426" href="#426">426</a> <em>     * @return &lt;code>true&lt;/code> if the connection was stale and therefore closed, </em>
<a name="427" href="#427">427</a> <em>     * &lt;code>false&lt;/code> otherwise.</em>
<a name="428" href="#428">428</a> <em>     * </em>
<a name="429" href="#429">429</a> <em>     * @see #isStale()</em>
<a name="430" href="#430">430</a> <em>     * </em>
<a name="431" href="#431">431</a> <em>     * @since 3.0</em>
<a name="432" href="#432">432</a> <em>     */</em>
<a name="433" href="#433">433</a>     <strong>public</strong> <strong>boolean</strong> closeIfStale() throws IOException {
<a name="434" href="#434">434</a>         <strong>if</strong> (isOpen &amp;&amp; isStale()) {
<a name="435" href="#435">435</a>             LOG.debug(<span class="string">"Connection is stale, closing..."</span>);
<a name="436" href="#436">436</a>             close();
<a name="437" href="#437">437</a>             <strong>return</strong> <strong>true</strong>;
<a name="438" href="#438">438</a>         }
<a name="439" href="#439">439</a>         <strong>return</strong> false;
<a name="440" href="#440">440</a>     }
<a name="441" href="#441">441</a>     
<a name="442" href="#442">442</a>     <em>/**<em>*</em></em>
<a name="443" href="#443">443</a> <em>     * Tests if stale checking is enabled.</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 enabled</em>
<a name="446" href="#446">446</a> <em>     * </em>
<a name="447" href="#447">447</a> <em>     * @see #isStale()</em>
<a name="448" href="#448">448</a> <em>     * </em>
<a name="449" href="#449">449</a> <em>     * @deprecated Use {@link HttpConnectionParams#isStaleCheckingEnabled()},</em>
<a name="450" href="#450">450</a> <em>     * {@link HttpConnection#getParams()}.</em>
<a name="451" href="#451">451</a> <em>     */</em>
<a name="452" href="#452">452</a>     <strong>public</strong> <strong>boolean</strong> isStaleCheckingEnabled() {
<a name="453" href="#453">453</a>         <strong>return</strong> <strong>this</strong>.params.isStaleCheckingEnabled();
<a name="454" href="#454">454</a>     }
<a name="455" href="#455">455</a> 
<a name="456" href="#456">456</a>     <em>/**<em>*</em></em>
<a name="457" href="#457">457</a> <em>     * Sets whether or not isStale() will be called when testing if this connection is open.</em>
<a name="458" href="#458">458</a> <em>     * </em>
<a name="459" href="#459">459</a> <em>     * &lt;p>Setting this flag to &lt;code>false&lt;/code> will increase performance when reusing</em>
<a name="460" href="#460">460</a> <em>     * connections, but it will also make them less reliable.  Stale checking ensures that</em>
<a name="461" href="#461">461</a> <em>     * connections are viable before they are used.  When set to &lt;code>false&lt;/code> some</em>
<a name="462" href="#462">462</a> <em>     * method executions will result in IOExceptions and they will have to be retried.&lt;/p></em>
<a name="463" href="#463">463</a> <em>     * </em>
<a name="464" href="#464">464</a> <em>     * @param staleCheckEnabled &lt;code>true&lt;/code> to enable isStale()</em>
<a name="465" href="#465">465</a> <em>     * </em>
<a name="466" href="#466">466</a> <em>     * @see #isStale()</em>
<a name="467" href="#467">467</a> <em>     * @see #isOpen()</em>
<a name="468" href="#468">468</a> <em>     * </em>
<a name="469" href="#469">469</a> <em>     * @deprecated Use {@link HttpConnectionParams#setStaleCheckingEnabled(boolean)},</em>
<a name="470" href="#470">470</a> <em>     * {@link HttpConnection#getParams()}.</em>
<a name="471" href="#471">471</a> <em>     */</em>
<a name="472" href="#472">472</a>     <strong>public</strong> <strong>void</strong> setStaleCheckingEnabled(<strong>boolean</strong> staleCheckEnabled) {
<a name="473" href="#473">473</a>         <strong>this</strong>.params.setStaleCheckingEnabled(staleCheckEnabled);
<a name="474" href="#474">474</a>     }