Re: HTTP ping pong

From:

Mark Space <markspace@sbc.global.net>

Newsgroups:

comp.lang.java.help

Date:

Sun, 03 May 2009 18:23:30 -0700

Message-ID:

<rsrLl.28483$yr3.24891@nlpi068.nbdc.sbc.com>

Roedy Green wrote:

1. If I login for example sometimes I see a page on the browser, then
that page is replaced by another page a few seconds like. I did not
touch the keyboard. What happened?

That's HTML, not HTTP. In other words, the browser received the
document, parsed it, and found a refresh tag.

<http://webdesign.about.com/od/metataglibraries/a/aa080300a.htm>

2. Does the sever ever send more than one response to the same
request?

At the level I think you are talking about, no. It's just one socket
connection from the browser. Not 100% sure though.

3. How do popups work. How can a server send you something you did not
request?

I think that's JavaScript running on your browser. Technically, you did
request it, you just didn't know it was going to do that. There could
be an HTML tag for pop-ups too, and some server responses generate a
pop-up automatically.

4. At the Java HTTP level, does do you know when you have hit the end
of the data? an EOF exception or something else?

It's done when the socket closes, which I think means you read and get a
"socket closed." That might also generate an EOF.