alex wu wrote:
Hello,
I want to compare the speed of webservers. I try to
use the following function. However the respond time
(Server_Speed) of almost all servers I test is zero.
I don't believe that the response speed of all
webservers are so fast - zero. There must be some
problem with the way I calculate it. Please help.
Alex,
your problem is that "open socket" doesn't wait until the connection is
established. From the docs:
When a connection is made, the open socket command creates a new
socket that can be used to communicate with the other system. The
handler continues executing while the connection is being established.
If you use the write to socket command while the connection is
opening, the data is buffered and is sent to the host as soon as the
connection is made.
You should be able to write a single byte to the socket - write to
socket does pause until the write is completed so this should give you
valid timings.
("valid timings" - this will give you approximately valid timings for
connection establishment - there's a lot more than that involved in the
overall speed of a web server, so I'd be very careful how much I read
into these results ...)
function haveIPconnect
put fld "domain" into theHostName
if colon is not in theHostName then
put colon & "80|test" after theHostName
end if
## Record the start time
put the long seconds into startTime
open socket theHostName
if theHostName is among the lines of the openSockets
then
## Calculate the response time
put the long seconds - startTime into Server_Speed
close socket theHostName
return true
else
beep
answer warning "The site may be down"
return false
end if
end haveIPconnect
--
Alex Tweedly http://www.tweedly.net
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