Returning data from a Call Server

OK, so I have a callserver process set up and running. I am
able to make a change in the callserver & it does show up in
the DCR.

I originally wanted to send a parameter from JS to Perl, have Perl
read some files and change some variables and have those variables
used again in JS.

Since the callserver is an async call, there really does not be a way to
wait for the answer. So I can write it so the Perl does more of the work,
but just curious if there are other options.

BTW, I have been following closely the other threads on call server, but thought
a new one was appropriate.

Andy

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Comments

jbonifaci

Andy, you can add a function to your FormAPI called something like functionToCallWhenMyCallServerIsComplete(returnVariableOneName, returnVariableTwoName, ...) and then call it at the end of your callServer:

parent.getScriptFrame().functionToCallWhenMyCallServerIsComplete('returnVariableOneValue', 'returnVariableTwoValue', ...);

~Jeff

LooseCannon

I think what I'm hearing you ask is, "how can I make the formapi code wait for the callserver to complete before continuing execution"?

Answer: After the callserver has completed, make the formapi function call from your callserver code (usually a registered function to the onload event), instead of calling the function from the formapi code.

Something like :


// formapi snippet
function handleName() {
 var params = new Object();
 params.absPath = parent.datacapture.getDCRVPath().substring(9);
 params.fileName = IWDCRInfo.getDCRName();
 IWDatacapture.callServer("http://"+server+"/iw-bin/iw_cgi_wrapper.cgi/someCode.cgi", params);
} 

function callBack(arg1, arg2, arg3) {
// formapi has waited... continue calling functions
 callSomeFunction(arg1);
 callSomeFunction(arg2);
 callSomeFunction(arg3);
}
// formapi snippet


## callserver snippet
... import ...

my $absPath = $in->param('absPath');
my $fileName = $in->param('fileName');

... logic ...

print qq(
<html>
 <body onload="parent.getScriptFrame().callBack('$arg1', '$arg2', '$arg3')"/>
</html>
);
## callserver snippet

nipper

I think what I'm hearing you ask is, "how can I make the formapi code wait for the callserver to complete before continuing execution"?

Yes, but also do I really want to ?

Coding is easier if I do that, but if I am really trying to shoehorn something in then I will not. I can certainly make the
call server code do more work. I suspect I am wandering on the bounds of what the code is supposed to do.

LooseCannon

From a code architecture standpoint I don't believe there's a right or wrong way...

aputnam

I have a similar desire to make my code wait after a callServer.
I have a handle_Save function (attached to the onSave event) that I want to return true or false based on the results of the callServer script. The handle function needs to be the one to return true(save) or false(do not save), not some other function that the server script calls. Any ideas on how to implement this? I am using TS6.5.

Thanks in Advance.

JonathonG

Since there isn't a way to make your code wait for the callServer, you have to return false from you save handler. Then, in the callback function that your callServer code calls, you would call IWDatacapture.save conditionally based on the results.

Jonathon
Interwoven Developer
Allstate, Inc.