Re: [ProgSoc] Java Socket Question .. [Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [ProgSoc] Java Socket Question .. To: phil
Subject: Re: [ProgSoc] Java Socket Question .. From: Ryan Heise Date: Mon, 8 Feb 1999 22:04:10 +1100 (EST) cc: "The Programmers' Society" In-Reply-To: Reply-To: Ryan Heise Sender: owner-progsoc@nospam.progsoc.uts.edu.au
On Mon, 8 Feb 1999, phil wrote:
: I have an applet that uses a standard socket (java.net.socket). that
: connects to a unix server.
: I need to know how to determine when the server side hangs up.
:
: It is possible to determine if the socket has problems, by trying to
: read from the input stream, if a EOF is received then I assume the socket
: is closed. However I dont want to periodically read from the input
: stream, just to check whether the socket is up. If I try this using
: buffered data channel, I lose my position and everything that is waiting
: for to be read, after the check.
JDK1.1 has limited support for socket options. Unfortunately it does not
support SO_KEEPALIVE. Besides, you probably want 1.02 for an applet. I
would think the only way to test a connection is to try to send data
over the socket and wait for an acknowledgement. Since you can't use
SO_KEEPALIVE, you will have to build it into your network protocol.
If it sounds like too much trouble, you are probably right.
Ryan Heise http://www.progsoc.uts.edu.au/~rheise/
=============================================================================
main(){printf("%d != %d, why?\n", sizeof('"')["'"],(sizeof('"'))["]\"\0["]);}
=============================================================================
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