Mysterious emails

In my e-commerce system, using authorize.net, after I get the response from authorize.net payment and the database is updated with her, I use a javascript redirect to activate the Mercia page and send the invoice to the customer. As follows:

< script type = "text/javascript" >
Window.Location = ' <? echo $url? > ';
< /script >

Where $url could be thankyou.php/12552/365558

.. .the customer and invoice number are passed through this url to retrieve billing to email data. It's not very safe, but the e-commerce transaction is complete at this point and no credit card or other sensitive information are pulled to the top.

The problem is that Saturday, since the previous Thursday confirmation emails are returned to the client, that confuses. In this case for one only customer using my hosted CMS, and that is be a customer who has the code conversion of google on this page.

I solved the problem by checking if the client is still connected (user id of the customer is in a SESSION variable) and not to let emails sent if the client is not connected.

A search engine robot could not create this problem there is no url parameters to activate the sending of e-mail, but the google conversion code could include parameters, but I don't know why he would go back and turn the page.

Someone has seen something like this before?

No real harm is done, but the client calls the customer to ask why they received the Bill a second time. This means that they had charged a second time, they want to know.

Thanks for your thoughts, Ben. I always suspect the GOOGLE conversion code is involved in this somehow and I would like to know how and why. I've searched the forum of webmaster of google for similar issues and found nothing.

Rather than using a GET I think dangerous in all situations

You are right that the session variables would be a suitable alternative, but I disagree that GET is dangerous in any situation. With sanitation and validation, the URL variables are very well. Probably every CMS sites use GET for navigation.

I think that the best practice is:

  • GET to navigation (page.php? id = 113 or page/123) and to make short, temporary, unsafe variables passed from one page to another.
  • POST for form remittances and requests for pages where it makes sense for some reason any
  • SESSIONS for a few variables you want to protect and especially for variables that are kept for a full browser session. Everyone uses SESSIONS to store logged credentials.
  • COOKIES for non-critical variables, not safe to be called if the user returns to the site, as for the choice of the language

Tags: Dreamweaver

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