Paypal not responding to rev cgi post

[Andre Garzia]

Thomas,

You're warned not to sell things using PayPal from your software so  
that the user clearly sees what the browser is doing... Best is to  
redirect to the browser page, the IPN spec works best using HTTPS,  
it's the only way, also IPN is not realtime, it will broadcast  
messages to your IPN CGI for 24hours I think...

cheers
andre


On Oct 21, 2005, at 2:27 AM, Thomas McCarthy wrote:

>
> I'm trying to implement a PayPal solution to registering my  
> software. Here's the flow:
>
> 1. students/users start up my app and click 'register'
> 2. A "register_window" rev stack is downloaded and the user chooses  
> some basic options.
> 3. They click send and my stack generates a key (thanks to Ken Ray  
> for the MACaddress code!) this key and a large random number are  
> sent to a cgi which stores them in my key_database.rev on the server.
> 4. the button checks for success of this and then takes a  
> preformatted PayPal button and replaces certain items (important:  
> the 'custom' item is pass-through, so I put the large random number  
> there as reference to the generated key) revGoURL opens the  
> browswer with the button info.
> 5. User (hopefully) completes paying and PayPal contacts my  
> "IPN.cgi" (instant payment notification"). My cgi reads the info,  
> attaches a "cmd=verify" (or something like that) and posts it back  
> for verification.
> TROUBLE: nothing comes back
> 6. Paypal also contacts my "PDT.cgi" which will generate the "Thank  
> you" page. Again, initial info is recieved all right, but posting  
> back for verification fails.
>
> Right now, testing with the PayPal sandbox system, I have to say  
> it's good enough without verification, and my app isn't something  
> folks are likely to spend a lot of time trying to figure out how to  
> steal. Also the initial info I read from the PayPal server is  
> probably enough for me to verify on my own--and decide if I should  
> withold the key or display it/email it out. Still, loose ends make  
> me nervous. Anyone have experience with PayPal?
>
> multas gratias agam,
> tm
>
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