LiveCode Forums.

Posted: **Thu Nov 26, 2009 10:26 am**

Hi all!

I'm having severe problems with libUrlMultipartFormData! Has this changed in version 4 in any way??? If I execute the following code in the message box

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libUrlMultipartFormData(theForm, "param1", "MyValue")

I get nothing in return (as it should be) but if I execute the following:

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libUrlMultipartFormData(theForm, "param1", "MyValue")
Put "Hello!"

I get the following message:

Message execution error:
Error description: Handler: can't find handler

As soon as I do anything *AFTER* the libUrlMultipartFormData my programs halts with the above error message.

I've tried to reinstall my revolution studio package but still have the same result. ANY IDEAS?????

Posted: **Thu Nov 26, 2009 12:03 pm**

libUrlMultipartFormData is a function, not a command - so if you try to use it as a command, the rev engine can't find it and throws the 'handler not found' error. So your script should read something like:

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get libUrlMultipartFormData(theForm, "param1", "MyValue")

HTH,

Jan Schenkel.

Posted: **Thu Nov 26, 2009 12:04 pm**

This must be due to a little syntax tightening in the engine I think. I don't know if and when anything has changed, but libURLMultiPartFormData definitely still works - but it is (and has always been) a function not a command, so calling it as a command/handler is not the right way (although the example in the docs is not specific about this, to the point of being misleading!)
If you try:

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   if libUrlMultipartFormData(theForm, "param1", "MyValue") is not empty then
      answer it && "error"
   else
      Put "Hello!"
   end if

you should hopefully find that it works.

HTH
SparkOut

[edit]Nice one Jan, beat me to it. And the "get" version is cleaner too.

Posted: **Thu Nov 26, 2009 1:27 pm**

Well maybe I reduced my code a little bit too much. If I use the

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if(...) then
  Answer it
end if

I always get the answer dialog but with no content

Posted: **Thu Nov 26, 2009 6:16 pm**

Yonly need to check the return value to see if something went wrong:

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get libUrlMultipartFormData(theForm, "param1", "MyValue")
if it is not empty then
  answer error it
else
  ## ... normal code
end if

Jan Schenkel.

Posted: **Thu Nov 26, 2009 10:24 pm**

Here's my current finding:

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if libUrlMultipartFormData(theForm, "param1", "MyValue") is not empty then
    answer it error
end if

always gives me the answer dialog with no contents!

But

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get libUrlMultipartFormData(theForm, "param1", "MyValue")
if it is not empty then
   answer it error
end if

Works OK! The previous code worked fine for me in version 3.5 but doesn't work in 4.0. Even though this looks like a bug to me I've been into programming to long to rule out that this isn't caused by my own fault...

Actually the problem started yesterday and I installed 4.0 when it arrived, but I've been working on other parts of my application (which uses XMLRPC-calls instead) and not used the libUrl... function again until now.

But thanks Jan for giving me something that works at least!!

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