N/file Module
File.url
Property Description: The URL of a file. This property is read-only.
Type: string
Supported Script Types: Server-side scripts For more information, see SuiteScript 2.0 Script Types.
Module: N/file Module
Since: 2015.2
Search NetSuite - https://system.netsuite.com/app/help/helpcenter.nl?search=File.url

// Code Example 1

//Add additional code ...

var fileObj = file.load({

    id: 'Images/myImageFile.jpg'

});

log.debug({

    details: "File URL: " + fileObj.url

});

//...

 //Add additional code



//SOURCE: https://system.netsuite.com/app/help/helpcenter.nl?fid=section_4229268651.html