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comp.lang.ruby

Socket timeout

Lee Jarvis

11/12/2007 12:13:00 AM

I am using a TCPSocket and I want the script to restart if the
connection times out. I have tried doing it myself and searched around
everywhere for a solution but I have had no luck.. Any help would be
great

tia

Lee
--
Posted via http://www.ruby-....
4 Answers

Francis Cianfrocca

11/12/2007 12:26:00 AM

0

Note: parts of this message were removed by the gateway to make it a legal Usenet post.

On 11/11/07, Lee Jarvis <jarvo88@gmail.com> wrote:
>
> I am using a TCPSocket and I want the script to restart if the
> connection times out. I have tried doing it myself and searched around
> everywhere for a solution but I have had no luck.. Any help would be
> great



What do you mean by "the connection times out"? Do you mean that the
connection has no read or write activity for some interval of time?

If you need to do that, then the Ruby/EventMachine library has that ability.
You'll need to rearrange your code to go this route, so perhaps someone else
will have a less invasive solution. If not, then look at EventMachine.

Lee Jarvis

11/12/2007 1:18:00 AM

0

Francis Cianfrocca wrote:
> What do you mean by "the connection times out"? Do you mean that the
> connection has no read or write activity for some interval of time?
Yes, basically


> If you need to do that, then the Ruby/EventMachine library has that
> ability.
> You'll need to rearrange your code to go this route, so perhaps someone
> else
> will have a less invasive solution. If not, then look at EventMachine.

Uh, I am editing an old program of mine which is quite large, about
1.4k+ lines, so I am trying to do it the least invasive way possible.. I
appreciate your input so quickly though. Perhaps this is the only route.

Lee
--
Posted via http://www.ruby-....

Yohanes Santoso

11/12/2007 2:18:00 PM

0

Lee Jarvis <jarvo88@gmail.com> writes:

Q> Francis Cianfrocca wrote:
>> What do you mean by "the connection times out"? Do you mean that the
>> connection has no read or write activity for some interval of time?
> Yes, basically


You can adjust the SO_RCVTIMEO and SO_SNDTIMEO socket options using
Socket#{get,set}sockopts.

However, they are susceptible to trickle attack. For example, if you
set the receive timeout to 30 seconds, then the sender can send just
one packet every 30 seconds, tying up resources on your end.

The proper solution requires application-level enforcement of
timeout. You can use the timeout library for the least invasive
mechanism to even changing the core mechanism to Ruby/EventMachine.


YS.



>
>
>> If you need to do that, then the Ruby/EventMachine library has that
>> ability.
>> You'll need to rearrange your code to go this route, so perhaps someone
>> else
>> will have a less invasive solution. If not, then look at EventMachine.
>
> Uh, I am editing an old program of mine which is quite large, about
> 1.4k+ lines, so I am trying to do it the least invasive way possible.. I
> appreciate your input so quickly though. Perhaps this is the only route.
>
> Lee
> --
> Posted via http://www.ruby-....

Roger Pack

11/12/2007 7:21:00 PM

0

If you're not worried about scaling then
Timeout::timeout(30) {
do stuff }

or
Thread.new {
sleep 30
if hasnt_done_anything
raise on it # scary!
end
}

maybe :)

Lee Jarvis wrote:
> I am using a TCPSocket and I want the script to restart if the
> connection times out. I have tried doing it myself and searched around
> everywhere for a solution but I have had no luck.. Any help would be
> great
>
> tia
>
> Lee

--
Posted via http://www.ruby-....