iTP Active Transaction Pages (iTP ATP) Programmer's Guide

ATP Web Page and Script Structure

iTP Active Transaction Pages (iTP ATP) Programmer’s Guide—522292-002

3-6

Using NonStop SQL from JavaScript

Accepting the Request from the Browser

To identify the kind of request received from the browser, the script

(/examples/sql/homebank/Webpages/address.atp) examines the

atp.request object. Specifically, the script tests the REQUEST_METHOD

environment variable, which is a property of the atp.request object. The value

POST indicates that the user submitted a form. In this case, POST signifies that the user

requested a transaction. (Alternatively, a script could recognize a transaction by

detecting that a specific button was pressed.)

The general structure of the script depends on the request method:

•

If this is a GET operation, get the current data, then print it.

•

If this is a POST operation, update the database, get the current (updated) data, and

then print it.

Example 3-3. NonStop SQL Includes and Server-Side JavaScript

</script>

</HEAD>

<BODY>

// Check why this page is being loaded (the page invokes

// itself to do transactions)

var ServiceName;

if (atp.request.REQUEST_METHOD=="POST")

// page is being loaded because user submitted a transaction

ServiceName = "addresschangeaccept";

else

ServiceName = "addresschangedisplay"

// Check security and get back the userid (in

// 'globalAccessUserid')....