Worldpay "Old Gateway" Callback 500 Error

[pbmasters]

I am running 1.7.2.4  instance and installed the Prestashop WorldPay Module to integrate with that service:

In Test Mode and using the REST API the process of transaction works without issue: upon submission the transaction against Worldpay works, the call back is fine and the order completes successfully.

In Gateway mode, this is not successful. Working with Worldpay we have determined a potential problem with the validation.php script which results in a Server Internal Error (500) which ultimately results in a call back fail:

POST /modules/worldpay/validation.php?msgType=authResult&installation=XXXXXX HTTP/1.0
Content-Length: 836
Host: www.essexmason.co.uk
Content-Type: application/x-www-form-urlencoded; charset=UTF-8
User-Agent: WJHRO/1.0 (WorldPay Java HTTP Request Object)

country=GB&authCost=36.00&msgType=authResult&routeKey=VISA_CREDIT-SSL&transId=3084100309&countryMatch=S&rawAuthMessage=cardbe.msg.authorised&authCurrency=GBP&charenc=UTF-8&compName=COMPANY+NAME&rawAuthCode=A&amountString=%26%23163%3B36.00&installation=XXXXXXX&currency=GBP&tel=&fax=&lang=en&countryString=United+Kingdom&email=test12345%40test.com&transStatus=Y&_SP.charEnc=UTF-8&amount=36.00&address=Worldpay&transTime=1512999187664&cost=36.00&town=&address3=&address2=&address1=&cartId=64&postcode=Cb40we&ipAddress=192.168.14.62&cardType=Visa&authAmount=36.00&MC_callback=https%3A%2F%2Fwww.oursite%2Fmodules%2Fworldpay%2Fvalidation.php&authMode=A&instId=XXXXXXX&displayAddress=Worldpay&AAV=00000&testMode=100&name=Test+Test&callbackPW=XXXXXXXXXXXXXXXXXXX&region=&AVS=2111&desc=&authAmountString=%26%23163%3B36.00

 

with the response:

HTTP/1.1 500 Internal Server Error
Server: nginx
Date: Mon, 11 Dec 2017 13:32:59 GMT
Content-Type: text/html; charset=utf-8
Connection: close
X-Powered-By: PHP/5.6.32
MS-Author-Via: DAV

 

Anbody have a similar experience or understand what is going on here.

Thanks 

Paul

[bellini13]

You need to enable debug mode and/or review your php error log to see what error might be causing the 500

[pbmasters]

Error logs show:

[Tue Dec 12 14:54:10.664725 2017] [proxy_fcgi:error] [pid 40068:tid 140275619940096] [client 195.x.x.x:38918] AH01071: Got error 'PHP message: PHP Fatal error:  Class 'psworldpay' not found in /var/www/vhosts/domain/httpdocs/modules/worldpay/validation.php on line 32\n'
[Tue Dec 12 14:54:10.892251 2017] [proxy_fcgi:error] [pid 40068:tid 140275536013056] [client 82.x.x.x:38920] AH01071: Got error 'Primary script unknown\n', referer: https://secure-test.streamline-esolutions.com/jsp/test/shopper/CardSTSimulator.jsp
 

[bellini13]

Ok, now that you have the error, you should contact the module author and ask for support

[pbmasters]

Yep. Thank you for confirming the course of action. This is a Prestashop module and awaiting their support to come back. I'll post the root cause once I know it. That could be some time it would seem.

 

[pbmasters]

So, I hope it will be useful to someone to post the result of this issue.

The root cause turned out to be a password issue. When I generate passwords I create a 20-25 character hashes. By copying and pasting this against the Module within the Prestashop instance and then again on the WorldPay Servers, it was assumed that they would be accepted in full. In fact, there is criteria and no validation to what is entered. In the case of one of the password fields, what is entered is truncated (although not sure if it was the module or WorldPay that has the shorter field) and therefore the passwords will not match.

Seems simple with hindsight, but it confounded everyone for a month.

I have requested the documentation to be updated to ensure the password length and style be known for that field.