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copied!<p>Whether the server closes the connection or not, depends on whether the client request asks for the connection to close or not.</p> <p>Here is a sample Server code:</p> <pre><code>import org.restlet.data.Form; import org.restlet.data.MediaType; import org.restlet.data.Parameter; import org.restlet.resource.Get; import org.restlet.resource.ServerResource; import org.restlet.util.Series; public class TestRestlet extends ServerResource { @Get public String getImpl(){ return "Sample Response Text\r\n"; } } </code></pre> <p>And here is what i got on linux commmand line (using only telnet): [Please note that the last line in request-header in each request is followed by 2 <i>newlines</i>] [To avoid any confusion, some of the requests do not contain request-body.]</p> <pre><code>[root@mylinuxserver]# telnet 172.16.101.34 6060 Trying 172.16.101.34... Connected to win7comp01 (172.16.101.34). Escape character is '^]'. GET /TestRestlet HTTP/1.1 Host: 172.16.101.34:6060 HTTP/1.1 200 OK Set-Cookie: JSESSIONID=C2E77F4D0437E525A0FC66498EF09E8B; Path=/hotelSoft Date: Wed, 31 Jul 2013 08:25:44 GMT Accept-Ranges: bytes Server: Restlet-Framework/2.0.15 Vary: Accept-Charset, Accept-Encoding, Accept-Language, Accept Content-Type: application/json;charset=UTF-8 Content-Length: 22 Sample Response Text GET /TestRestlet HTTP/1.1 Host: 172.16.101.34:6060 Connection: Keep-Alive HTTP/1.1 200 OK Set-Cookie: JSESSIONID=1873DE26443F5DF62379B895AEA0F004; Path=/hotelSoft Date: Wed, 31 Jul 2013 08:25:48 GMT Accept-Ranges: bytes Server: Restlet-Framework/2.0.15 Vary: Accept-Charset, Accept-Encoding, Accept-Language, Accept Content-Type: application/json;charset=UTF-8 Content-Length: 22 Sample Response Text GET /TestRestlet HTTP/1.1 Host: 172.16.101.34:6060 Connection: close HTTP/1.1 200 OK Set-Cookie: JSESSIONID=43EC7C9AACC6C0CEF6FAC8F608B1D79C; Path=/hotelSoft Date: Wed, 31 Jul 2013 08:25:57 GMT Accept-Ranges: bytes Server: Restlet-Framework/2.0.15 Vary: Accept-Charset, Accept-Encoding, Accept-Language, Accept Content-Type: application/json;charset=UTF-8 Content-Length: 22 Connection: close Sample Response Text Connection closed by foreign host. [root@mylinuxserver]# telnet 172.16.101.34 6060 Trying 172.16.101.34... Connected to win7comp01 (172.16.101.34). Escape character is '^]'. GET /TestRestlet HTTP/1.0 HTTP/1.1 200 OK Set-Cookie: JSESSIONID=2C879A91F2501DD9D3B39EF50C3F46CA; Path=/hotelSoft Date: Wed, 31 Jul 2013 08:26:09 GMT Accept-Ranges: bytes Server: Restlet-Framework/2.0.15 Vary: Accept-Charset, Accept-Encoding, Accept-Language, Accept Content-Type: application/json;charset=UTF-8 Content-Length: 22 Connection: close Sample Response Text Connection closed by foreign host. [root@mylinuxserver]# telnet 172.16.101.34 6060 Trying 172.16.101.34... Connected to win7comp01 (172.16.101.34). Escape character is '^]'. GET /TestRestlet Sample Response Text Connection closed by foreign host. [root@mylinuxserver]# </code></pre> <p>In the above examples, several types of HTTP connections are made.</p> <p>The response to the 1st request:</p> <pre><code>GET /TestRestlet HTTP/1.1 Host: 172.16.101.34:6060 </code></pre> <p>[Note: the line <code>Host: 172.16.101.34:6060</code> is followed by 2 <code>\r\n</code>: <code>\r\n\r\n</code>]</p> <p>is:</p> <pre><code>HTTP/1.1 200 OK Set-Cookie: JSESSIONID=C2E77F4D0437E525A0FC66498EF09E8B; Path=/hotelSoft Date: Wed, 31 Jul 2013 08:25:44 GMT Accept-Ranges: bytes Server: Restlet-Framework/2.0.15 Vary: Accept-Charset, Accept-Encoding, Accept-Language, Accept Content-Type: application/json;charset=UTF-8 Content-Length: 22 Sample Response Text </code></pre> <p>The connection is not closed yet, and we send another request:</p> <pre><code>GET /TestRestlet HTTP/1.1 Host: 172.16.101.34:6060 Connection: Keep-Alive </code></pre> <p>That gets the response:</p> <pre><code>HTTP/1.1 200 OK Set-Cookie: JSESSIONID=1873DE26443F5DF62379B895AEA0F004; Path=/hotelSoft Date: Wed, 31 Jul 2013 08:25:48 GMT Accept-Ranges: bytes Server: Restlet-Framework/2.0.15 Vary: Accept-Charset, Accept-Encoding, Accept-Language, Accept Content-Type: application/json;charset=UTF-8 Content-Length: 22 </code></pre> <p>Still the connection is not closed.</p> <p>However on the 3rd request:</p> <pre><code>GET /TestRestlet HTTP/1.1 Host: 172.16.101.34:6060 Connection: close </code></pre> <p>The connection is closed, because the request contains <code>Connection: close</code> header. You can see the telnet exits after displaying a message: <code>Connection closed by foreign host.</code></p> <p>There are 2 more sample request-response in the above given examples:</p> <p>1.An HTTP 1.0 request:</p> <pre><code>GET /TestRestlet HTTP/1.0 </code></pre> <p>With response:</p> <pre><code>HTTP/1.1 200 OK Set-Cookie: JSESSIONID=2C879A91F2501DD9D3B39EF50C3F46CA; Path=/hotelSoft Date: Wed, 31 Jul 2013 08:26:09 GMT Accept-Ranges: bytes Server: Restlet-Framework/2.0.15 Vary: Accept-Charset, Accept-Encoding, Accept-Language, Accept Content-Type: application/json;charset=UTF-8 Content-Length: 22 Connection: close Sample Response Text </code></pre> <p>And the telnet exits after displaying: <code>Connection closed by foreign host.</code></p> <p>2.A request without HTTP version mentioned:</p> <pre><code>GET /TestRestlet </code></pre> <p>And response is: (Without headers)</p> <pre><code>Sample Response Text </code></pre> <p>And the telnet exits with a message: <code>Connection closed by foreign host.</code></p> <p>Conclusion:</p> <p>Whatever is your client / client-program , make it send an HTTP-1.0 request , or a HTTP-1.1 request with <code>Connection: close</code> header.</p> <p>In Java, you achieve this by:</p> <pre><code>import java.net.HttpURLConnection; import java.net.URL; . . . HttpURLConnection httpURLConnection = (HttpURLConnection) new URL("http://....").openConnection(); httpURLConnection.setRequestProperty("Connection","close"); // rest of the code here.... </code></pre> <p>Also check if a statement like this:</p> <pre><code>httpURLConnection.disconnect(); </code></pre> <p>can help you disconnect the connection.</p>

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