Re: Flowscript continuation from external reply

Tue, 21 Feb 2006 05:11:45 -0800

Hi Andrew,
first question. When you say "pass variables to an external site" you mean "redirect the user to an external site, like a payment gateway, and then the external site will redirect the user back to me" right?

In that case, the redirectTo function does not suspend the current execution, and there is no "redirectAndWait" function, so you are sending the user to the site, but the flow is not waiting for the response.

You can solve in two ways :

1) Instead of using redirectTo, set up a page with a link to the external site (like a jx page), then use sendPageAndWait to send this page to the user, he will click on the link, go to the external site and all the rest, while your flow will be suspended until the external site will redirect him to your continuation and the flow will restart. This is a clean solution, but involves one more step for the user.

2) Create a webContinuation in your flow (you can do this in _javascript_ flow), before the redirectTo. This way you have a "bookmark" in your flow the user can be redirected to, even if you haven't stopped the flow directly. This is quite a dirtier solution, but avoids the extra click. Here is the pseudocode:

continuation = createWebcontinuation();
if (value-returned == null) {
    redirectTo(externalSite + continuation.id);
} else {
    if (value-returned == true) {
       etc etc
    }
}

You have to check if there is a returned value because when the user is redirected back to your site the flow will restart from the line immediately after the creation of the continuation, so you have no way to determine if this is the first time the user is entering this flow  or if it's returning from the external site if not checking for the presence of the return value.

Hope this helps,
Simone

Andrew Madu wrote:
Hi,
I have a flowscript function which passes some variables to an external site. The site will send back a success or failure confirmation based upon the parameters passed. What I want to do next is continue on the from the next point in time after the external site was contacted, so:

I want to create some flowscript which passes variables to an external site, (https://www.externalsite.com/test.asp?contiuation-id=xxx, var1=x,var2=x) for example, gets a response back from the external site (http://www.mysite.com/continuation-id/value-returned), and based on the response sent back does something else following the initial call to the external site. How do I do this in flowscript? 

So what i'm thinking is something like:

function getResults() {


if (value-returned == 'true') {
do this
}else{
do this
}
}

How do I get back to the point after cocoon.redirectTo() using the returned continuation-id?

thanks in advance

Andrew
--
Simone Gianni

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