CURL Error 28

15 Jun 2020, 9:34 PM

#1

New Zenner

Join Date:: Sep 2017
Location:: United States
Posts:: 14
Plugin Contributions:: 0

CURL Error 28

Hi Guys,

PHP Version: 5.4.45
Zen Cart Version: 1.5.1
Database: MySQL 5.5
Server OS: Linux
HTTP Server: Apache/2.4.43
Godaddy VPS
Site URL:adulttoyssupermart.com

My site was working fine for over a 1 year, and for the past week my credit card transaction through PayPal express is not appearing in my Zen Cart admin but appearing in PayPal. I took a look at the debug file and i see this error message CURL Error 28. Can someone look at the attached debug file and let me know how to fix this. It will be well appreciated!

16 Jun 2020, 7:14 PM

#2

astm0652

New Zenner

Join Date:: Sep 2017
Location:: United States
Posts:: 14
Plugin Contributions:: 0

Re: CURL Error 28

Any help with this thread?

More info:

curltester.php

Array
(
[url] => "http://www.zen-cart.com/testcurl.php"
[content_type] =>
[http_code] => 301
[header_size] => 373
[request_size] => 212
[filetime] => -1
[ssl_verify_result] => 0
[redirect_count] => 0
[total_time] => 0.163397
[namelookup_time] => 0.053317
[connect_time] => 0.105027
[pretransfer_time] => 0.105128
[size_upload] => 37
[size_download] => 0
[speed_download] => 0
[speed_upload] => 226
[download_content_length] => -1
[upload_content_length] => 37
[starttransfer_time] => 0.163328
[redirect_time] => 0
[certinfo] => Array
(
)

[primary_ip] => 172.67.134.32
[primary_port] => 80
[local_ip] => 198.12.152.24
[local_port] => 34892
[redirect_url] => https://www.zen-cart.com/testcurl.php

)

curltester.php?paypal=1

4 OpenSSL was built without SSLv3 support
Array
(
[url] => "https://api-3t.paypal.com/nvp"
[content_type] =>
[http_code] => 0
[header_size] => 0
[request_size] => 0
[filetime] => -1
[ssl_verify_result] => 1
[redirect_count] => 0
[total_time] => 0.059446
[namelookup_time] => 0.001015
[connect_time] => 0.059314
[pretransfer_time] => 0
[size_upload] => 0
[size_download] => 0
[speed_download] => 0
[speed_upload] => 0
[download_content_length] => -1
[upload_content_length] => -1
[starttransfer_time] => 0
[redirect_time] => 0
[certinfo] => Array
(
)

[primary_ip] => 173.0.88.69
[primary_port] => 443
[local_ip] => 198.12.152.24
[local_port] => 59854
[redirect_url] =>

)

EOF

curltester.php?ssl=1

4 OpenSSL was built without SSLv3 support
Array
(
[url] => "https://www.zen-cart.com/testcurl.php"
[content_type] =>
[http_code] => 0
[header_size] => 0
[request_size] => 0
[filetime] => -1
[ssl_verify_result] => 1
[redirect_count] => 0
[total_time] => 0.105916
[namelookup_time] => 0.054076
[connect_time] => 0.10578
[pretransfer_time] => 0
[size_upload] => 0
[size_download] => 0
[speed_download] => 0
[speed_upload] => 0
[download_content_length] => -1
[upload_content_length] => -1
[starttransfer_time] => 0
[redirect_time] => 0
[certinfo] => Array
(
)

[primary_ip] => 104.28.7.98
[primary_port] => 443
[local_ip] => 198.12.152.24
[local_port] => 48686
[redirect_url] =>

)

16 Jun 2020, 7:37 PM

#3

drbyte

Sensei

Join Date:: Jan 2004
Posts:: 63,513
Plugin Contributions:: 176

Re: CURL Error 28

You're going to find it increasingly difficult to support your old PHP 5.4 server as time goes along. PHP 5.4 has been obsolete for a couple years already. Out-of-the-box it has no awareness of the modern TLS methods for talking to servers (maybe GoDaddy has patched it somehow, I dunno?)

The "OpenSSL wasn't compiled with SSLv3" errors are simply a reflection that the curltester you're using is trying to use a completely outdated type of SSL/TLS connection. You might try grabbing the latest from https://github.com/zencart/zencart/tree/v157/extras and try again.

CURL error 28 means "operation timed out" ... meaning, in theory, "we tried to connect to PayPal to make a transaction, but the connection didn't complete in the allowed timeframe" ... where the timeframe is typically 6-10 seconds ... which is a LONG time just to connect.

"why" it's timing out is indeed the thing you need to chase down.
It could be your server.
It could be your PHP version.
It could be firewalls.
It could be PayPal is rejecting your incoming transaction requests because they're coming from a format they no longer support. That wouldn't surprise me given you're using ZC v1.5.1 which was released in 2012.
While, yes, I'll absolutely advocate that you should be upgrading, I realize that's not a helpful statement when you just want transactions to work again. It would indeed be helpful to know exactly "why" in order to be certain that upgrading is the key step or not. Upgrading should still be done, but I agree it'd be helpful to get payments working first if possible and then spend time on an upgrade while transactions are still happening.

.
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16 Jun 2020, 8:05 PM

#4

astm0652

New Zenner

Join Date:: Sep 2017
Location:: United States
Posts:: 14
Plugin Contributions:: 0

Re: CURL Error 28

Thank you for replying. I got my work cut out for me lol, i'll keep you posted.

Thank You Again!

16 Jun 2020, 8:15 PM

#5

astm0652

New Zenner

Join Date:: Sep 2017
Location:: United States
Posts:: 14
Plugin Contributions:: 0

Re: CURL Error 28

New curltester.php

Connection uses TLS 1.3

Testing communications to various destinations. This is a simple diagnostic to determine whether your server can connect to common destinations.
For advanced "details" mode, add ?details=on to the URL.

(Another resource you may find useful for testing your server's overall customer-facing SSL configuration: https://www.ssllabs.com/ssltest/index.html )

Connecting to Zen Cart Version Server (http) ...
GOOD: CURL Connection successful.

Connecting to Zen Cart Version Server (https) ...
GOOD: CURL Connection successful.

Connecting to Zen Cart Support Server (https) ...
GOOD: CURL Connection successful.

Connecting to USPS (port 80)...
GOOD: CURL Connection successful.

Connecting to USPS Test/Staging/Sandbox Server (port 80)...
GOOD: CURL Connection successful.

Connecting to UPS (port 80)...
GOOD: CURL Connection successful.

GOOD: Socket established

Connecting to UPSXML (onlinetools.ups.com) ...
GOOD: CURL Connection successful.

Connecting to UPSXML (sandbox) ...
GOOD: CURL Connection successful.

Connecting to FedEx (port 80)...
GOOD: Socket established

Connecting to Canada Post SellOnline HTTP/S ...
GOOD: CURL Connection successful.

Connecting to Canada Post REST API (SSL) ...
GOOD: CURL Connection successful.

Connecting to PayPal IPN (port 443)...
GOOD: Socket established

GOOD: CURL Connection successful.

Connecting to PayPal IPN (port 443) Sandbox ...
GOOD: Socket established

GOOD: CURL Connection successful.

Connecting to PayPal Express/Pro Server ...
GOOD: CURL Connection successful.

Connecting to PayPal Express/Pro Sandbox ...
GOOD: CURL Connection successful.

Connecting to PayPal Payflowpro Server ...
GOOD: CURL Connection successful.

Connecting to PayPal Payflowpro Pilot/Sandbox Server ...
GOOD: CURL Connection successful.

Connecting to PayPal TLSTest Server ...
Error 6: Could not resolve host: tlstest.paypal.com

Connecting to Cardinal Commerce 3D-Secure Server ...
GOOD: CURL Connection successful.

Connecting to Square Payments Server ...
GOOD: CURL Connection successful.

Connecting to AuthorizeNet Production Server ...
GOOD: CURL Connection successful.

Connecting to AuthorizeNet Developer/Sandbox Server ...
GOOD: CURL Connection successful.

Connecting to First Data GGe4 server (SSL)...
GOOD: CURL Connection successful.

Connecting to Elavon Server...
GOOD: CURL Connection successful.

Connecting to Elavon Sandbox Server...
GOOD: CURL Connection successful.

Testing completed. See results above.