App submission that intercepts html form submission request

Hi,

I would like to confirm if below feature / behaviour of an app would be acceptable and don't violate the app store guidelines.

My problem is to get the mappings of html input fields from a web page loaded in a UIWebview e.g from the html tags below, I would like to get the value of "name" attribute.

<input type="text" id="username" name="username">

<input type="password" id="password" name="password">

For that purpose I'm intended to follow the two steps below:

1- get the html when page gets loaded completely

2- capture UIWebViewNavigationTypeFormSubmitted callback and compare the body part of NSURLRequest with the initial html to get these mappings

The form could be either login or checkout form bringing some sensitive data to the server. Would there be an issue in submitting this app?