Enumerators are collections of data that can be iterated through. Although useful, they are not compliant with ECMAScript standards, and therefore I prefer not to use them. Some objects in the ASP environment however, such as Request.Form, are provided as Enumerators, and need to be converted them to standard JScript objects. Here’s a couple of routines to do so.
I keep all the functions below in a generic include, coll2obj.asp, and use it across projects. This is a generic collection-to-object conversion, which doesn’t seem to work on some built-in collections.
/* coll2obj
* transforms a VB collection thing in a JS-friendly object
*
*/
function coll2obj( coll )
{
var enm = new Enumerator( coll );
var obj = new Object();
while( !enm.atEnd() )
{
obj[enm.item().name] = enm.item().value;
enm.moveNext();
}
return obj;
}
The function below converts the Request.ServerVariables collection into a simple JSCript file object.
/* env2obj
* transforms Request.ServerVariables VB collection thing in a JS-friendly object
*
*/
function env2obj()
{
var enm = new Enumerator(Request.ServerVariables);
var obj = new Object();
var ei, en;
while(!enm.atEnd())
{
ei = enm.item();
if( Request.ServerVariables.Item( ei ).Count > 1 )
{
obj[ei] = new Array();
en = new Enumerator( Request.ServerVariables( ei );
while( !en.atEnd() )
{
obj[ei][ obj[ei].length ] = en.item();
en.moveNext();
}
en = null;
}
else
{
obj[ei] = new String( Request.ServerVariables( ei ) );
}
enm.moveNext();
}
return obj;
}
This converts post variables to a JScript object.
/* post2obj
* transforms Request.Form VB collection thing in a JS-friendly object
*
*/
function post2obj()
{
var enm = new Enumerator( Request.Form );
var obj = new Object();
var ei, en;
while( !enm.atEnd() )
{
ei = enm.item();
if( Request.Form.Item( ei ).Count > 1 )
{
obj[ei] = new Array();
en = new Enumerator(Request.Form( ei ));
while( !en.atEnd() )
{
obj[ei][ obj[ei].length ] = en.item();
en.moveNext();
}
en = null;
}
else
{
obj[ei] = new String(Request.Form( ei ) );
obj[ei] = obj[ei].replace( /^s+|s+$/, '' );
}
enm.moveNext();
}
return obj;
}
This function converts the query string variables collection into a JScript object.
/* query2obj
* transforms Request.QueryString VB collection thing in a JS-friendly object
*
*/
function query2obj()
{
var enm = new Enumerator( Request.QueryString );
var obj = new Object();
var ei, en;
while( !enm.atEnd() )
{
ei = enm.item();
if( Request.QueryString.Item( ei ).Count > 1 )
{
obj[ei] = new Array();
en = new Enumerator(Request.QueryString( ei ));
while( !en.atEnd() )
{
obj[ei][ obj[ei].length ] = en.item();
en.moveNext();
}
en = null;
}
else
{
obj[ei] = new String(Request.QueryString( ei ) );
obj[ei] = obj[ei].replace( /^s+|s+$/, '' );
}
enm.moveNext();
}
return obj;
}
