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For 2023 (and 2024 ...) - we are now fully retired from IT training.
We have made many, many friends over 25 years of teaching about Python, Tcl, Perl, PHP, Lua, Java, C and C++ - and MySQL, Linux and Solaris/SunOS too. Our training notes are now very much out of date, but due to upward compatability most of our examples remain operational and even relevant ad you are welcome to make us if them "as seen" and at your own risk.

Lisa and I (Graham) now live in what was our training centre in Melksham - happy to meet with former delegates here - but do check ahead before coming round. We are far from inactive - rather, enjoying the times that we are retired but still healthy enough in mind and body to be active!

I am also active in many other area and still look after a lot of web sites - you can find an index ((here))
webpage -> script.php -> script.exp  time problem

Posted by liderbug (liderbug), 5 August 2005
I have a webpage with form/Submit which calls a php script.  In that php script I have
exec ("/a/b/script.exp machine arg1 arg2", $result);
script.exp has:
...
send -- "ssh user@$machine arg1 2
expect -exact "word: "
etc .......

If I run the php script from the command line it takes about 2 seconds.
If I run via the web page it takes 22 seconds+.  I think what is happening is when it connects it repeats evey character checking for "word:"  ie
c
co
con
conn
conne
connec
connect etc etc etc
and on and on and thats what is eating up all the time.  Has anyone run across this problem?  And more over a soultion.

Thanks

Posted by admin (Graham Ellis), 5 August 2005
Sounds odd.  Can you post a short PHP script and a short Expect script that illustrate the problem - otherwise I'm just guessing at what it might be ...

Posted by liderbug (liderbug), 5 August 2005
Problem solved -   ssh "minux little x"  u@h  

send -- "ssh -x user@$machine arg1 2

disable X11Forwarding - now what that has to do with acculation fo incoming characters ? but it does.
------------------------------------------------------------
snipet of php
 foreach ($inputlist as $mach) {
       exec (".../foo4.exp $mach, $[arg1] 2 3", $result);
 }
-------------- snipet of exp
send -- "ssh  -x  user@$arg0\r"
exp... "word:"
etc
-------------------------------------




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