Asp net validating querystring Xxx vadio mavo
My old friend the is perfect for this; it centralises input clean up by plugging into the request pipeline, and can swapped for a different module later if the screening rules change.
However, there are times where important state needs to be passed through the querystring and, under no circumstances, should be it be able to be modified by the end user.
If someone injects another value at last for the same text box in the posted request, the value would come like 'Test, Mallicous Value'. In short, want to get rid of HTTP Parameter Pollution. Hi, Glad you've found it useful :) If someone decides to post junk to your site, there's not really anything you can do to identify which bits they've sent are junk, and which bits aren't. Normally it works fine for me but it don't work as expected when Ajax calls come into the picture.
You could adapt the above Http Module to add a parameter to requests where HTML tags have been removed or where there are multiple values for the same form key, but you'd have to review flagged requests manually to see if you thought they really were junk. I can read the querystring colletion of ajax request but some how its not upating the collection value.
(We'll discuss some of these cases in more detail further on in this article.) Such tamper-proof URLs can be created quite easily by using a one-way hash to sign the querystring parameters that you do not want edited and appending that signature to the querystring.
The web page being visited, then, can apply the same hash to the plain-text querystring parameters and ensure that it matches up to the signature included in the querystring.