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Alternative to QueryString

Posted on 2009-04-09
Last Modified: 2013-11-26
I'm building a web store.  When a visitor clicks on a product category link, such as "Furniture" or "Clothing", I would pass the a variable that represented their selection via a querystring.  This variable would be used in my SQL code to retrive the products from my database and load them onto the page.

Is there a better more secure way of doing this?  Any suggestions would be appriciated.  Thanks!
Question by:cdemott33
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Expert Comment

by:Sreedhar Vengala
ID: 24111569
LVL 37

Expert Comment

ID: 24111573
Well, you could use a session...but I would continue using the querystring.
It would let your users bookmark a link directly to a category...like:
I've got tons of links to different ebay, amazon, and carmax searches and products that wouldn't work if they didn't use querystrings!

If your concern is security...just make sure you pass the querystring to your SQL with a parameter and/or to a stored procedure and I don't think you need to be overly concerned about security...
Alternately, you could implement some basic encryption on your querystring variables if you're really concerned...but..again...I don't think you need to be...

Expert Comment

by:Sreedhar Vengala
ID: 24111610
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Expert Comment

ID: 24113335
The most important thing here is why do u want to secure the querystring. If you dont want you users to able to see categoryid actually used, you can use some function on your app to encrypt and decrypt the category id so that the acutall id will be hidden from the users point of view.



Author Comment

ID: 24115127
I guess my main concern is that the querystring value, such as...


...is used in my sql statement.  So on button click I assign the value of the querystring to a string variable that's pumped into my SELECT statement.  (ie SELECT * FROM catalog WHERE productTpye = ** my request.querystring value** )

I've been told to use sql parameters to help with sql injection attackes but do you all believe that secure enough?

LVL 37

Accepted Solution

samtran0331 earned 500 total points
ID: 24115496
>>I've been told to use sql parameters to help with sql injection attackes but do you all believe that secure enough?

Sql injections works by trying to concatentate additional sql statements into yours...if you use parameters, the concatenation fails because it is a parameter to your sql...it can't be bypassed by the injection.

Author Closing Comment

ID: 31568747
Thanks for all your help!

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