Re: faking HTTP with a socket channel

From:
Roedy Green <see_website@mindprod.com.invalid>
Newsgroups:
comp.lang.java.programmer
Date:
Tue, 12 Aug 2008 21:59:04 GMT
Message-ID:
<4t04a4pi5dmi0v99dkg3fjv3jqm2kn04gb@4ax.com>
On Mon, 11 Aug 2008 07:45:49 GMT, Roedy Green
<see_website@mindprod.com.invalid> wrote, quoted or indirectly quoted
someone who said :

When you get your HttpConnection object, just what has happened at
that point?


I did an experiment here in the output:

a: 4160
b: 4362600 <- . openConnection
c: 142284360 <- .connect
200
d: 229896880 <- .getResponseCode
e: 2611160 <-.getInputStream

So it looks like .connect does the work -- establishing the socket and
sending the header.

It looks like getResponse code blocks until the response from the
server.

   

         elapsed( "a:" );

         URLConnection urlc = source.openConnection();
         elapsed( "b:" );

         if ( urlc == null )
            {
            throw new IOException( "Unable to make a connection." );
            }
         else
            {
            if ( DEBUGGING )
               {
               // get simple name of class without the package
               String s = urlc.getClass().getName();
               // manually chop off all past the last dot.
               int lastDot = s.lastIndexOf( '.' );
               if ( lastDot >= 0 )
                  {
                  s = s.substring( lastDot + 1 );
                  }
               System.out.println( " Connecting to " +
source.toString() + " with " + s );
               }
            }
         urlc.setAllowUserInteraction( false );
         urlc.setDoInput( true );
         urlc.setDoOutput( false );
         urlc.setUseCaches( false );
         urlc.setReadTimeout( readTimeout );
         urlc.setConnectTimeout( connectTimeout );
         urlc.setRequestProperty( "Accept",
                                  "text/html, image/png, image/jpeg,
image/gif, application/x-java-serialized-object, text/x-java-source,
text/xml, application/xml, "
                                  +
                                  "text/css,
application/x-java-jnlp-file, text/plain, application/zip,
application/octet-stream, *; q=.2, */*; q=.2" );
         urlc.connect();
         elapsed( "c:" );

         System.out.println( ( (HttpURLConnection)
urlc).getResponseCode() );
         elapsed("d:" );

         long length = urlc.getContentLength();// -1 if not available

         // O P E N _ S O U R C E, raw byte stream
         InputStream is = urlc.getInputStream();
         elapsed( "e:" );

--

Roedy Green Canadian Mind Products
The Java Glossary
http://mindprod.com

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