PayPal IPN - INVALID

Question

All those of you with experience of PayPal IPN know that this
should be simple, right?
You point PayPal's IPN checker at your page and it POST's to
it. You gather the form field values, loop over them, add
thehe22cmd" name/value pair and post them back. Simple, no,
INVALID. What am I missing here? Something in the cfhttp or
cfhttpparam? I'm foxed!
dickbob

Answer 1

quote:
As I understand it PayPal's IPN now requires a POST rather
than a GET
All of my code that I use with IPN is GET, and it is used
many times during the day.
On my IPN, which is setup mainly for ReOccuring Payments, I
use this CODE:
<cftry>
<cfset x = GetHttpRequestData()>
<CFSET str="cmd=_notify-validate&" & x.content>
<CFHTTP URL="https://www.paypal.com/cgi-bin/webscr?#str#"
METHOD="GET" RESOLVEURL="false">
</CFHTTP>
<!---Set vars from returned data--->
<CFIF #CFHTTP.FileContent# is "VERIFIED">
<cfset txn_type = '#FORM.txn_type#'>
<CFIF IsDefined("FORM.item_number")>
<cfset Username = '#form.item_number#'>
</cfif>
<CFIF IsDefined("url.username")>
<cfset Username = '#url.username#'>
</cfif>
<cfset payer_id = '#form.payer_id#'>
<cfset subscr_id = '#form.subscr_id#'>
<cfset first_name = '#form.first_name#'>
<cfset last_name = '#form.last_name#'>
<cfset payer_email = '#FORM.payer_email#'>
<CFIF IsDefined("FORM.subscr_date")>
<cfset subscr_date = '#form.subscr_date#'>
</cfif>
<CFIF IsDefined("FORM.payment_date")>
<cfset payment_date = '#form.payment_date#'>
</cfif>
<CFIF IsDefined("FORM.payment_gross")>
<cfset payment_gross = '#form.payment_gross#'>
</cfif>
<CFIF IsDefined("FORM.payment_status")>
<cfset payment_status = '#form.payment_status#'>
</cfif>
<CFIF IsDefined("FORM.txn_id")>
<cfset txn_id = '#form.txn_id#'>
</cfif>
</CFIF>
<!---If this is a subscription setup--->
<cfif #FORM.txn_type# is "subscr_signup">
<!---update orders table--->
cfquery name="InsertOrder" datasource="#mydatasource#">
INSERT INTO Orders(user_name, payment_status, payment_date,
payment_gross, txn_id, txn_type, payer_email, subscr_date,
subscr_id, payer_id)
VALUES('#Username#', 'SubSetup',
'#DateFormat(now(),'mm/dd/yy')#', '0', '', '#TXN_TYPE#',
'#payer_email#', '#DateFormat(now(),'mm/dd/yy')#','#subscr_id#',
'#payer_id#')
</cfquery>
<cfcatch type="any">
<cffile action="append"
file="d:\inetpub\website\paypal_errorlog.txt"
output="#DateFormat(Now(),'mm/dd/yy')#: Error on Paypal IPN
page:
#cfcatch#">
<br />
</cfcatch>
</cftry>
Now I also do quite a bit of other things as well in my code,
update tables and send emails, and the query here is for example .
But this works fine all of the time.
What error are you getting exactly?