Re: load, url and repeat

[Dave Cragg]

At 4:42 pm +0100 3/1/04, Ludovic Thébault wrote:

How use the url command in a loop ?

I want to get a lot of web page which an url like this :
http://domain.com/page.php?ID=88
I just need to change the number of ID to get all pages.

But it's seem that the loop is too fast to get the info, even with a
"load" command.
I try with this script :

on mouseup
repeat with n=1 to 810
    put "http://domain.com/page.php?ID="&n into turl
    load url turl
    put n&&the urlstatus of turl&cr after msg
    if the urlstatus of turl = "cached" then downloadcomplete
end repeat
end mouseup
  on downloadcomplete
   -- do my stuff
    unload url turl
  end downloadcomplete
How do my stuff after the url is really cached ?
Instead of "load url" in this case, you could use 
"get url". This will ensure the script blocks 
until the url has been "got".

 on mouseup
  repeat with n=1 to 810
     put "http://domain.com/page.php?ID="&n into turl
     get url turl
       if the result is empty then
        ## do stuff with "it" here
      else
        ## handle error here
      end if
  end repeat
 end mouseup
"load url" is useful when you want to cache the 
url and access it later, or when you don't want 
your script to block while the data is 
downloaded. Neither seems to be the case here so 
"get url" is probably easier.

When using "load url", you need to use "with 
message" if you need to know when the url has 
finished loading. Something like this:

on mouseup
 repeat with n=1 to 810
     put "http://domain.com/page.php?ID="&n into turl
     load url turl with message "downloadcomplete"
 end repeat
end mouseup
  on downloadcomplete pUrl, pStatus
    if pStatus is "cached" then
     -- do my stuff
    else
    -- handle error
    end if
    unload url pUrl
  end downloadcomplete
Cheers
Dave
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