Error 52: Empty reply from server -- PayPal Express Checkout

[ctcentralinfo]

I just received this error message via email:

ALERT: PayPal Express Checkout Error

- (52) Empty reply from server

What could be causing this? I received this error after I upgraded to PayPal Express Checkout. I even uninstalled it and reinstalled it as instructed.

[DrByte]

That's a CURL error ... which suggests your server's CURL configuration may be weird.

What version of Zen Cart?

[ctcentralinfo]

I am currently using 1.3.8

[DrByte]

What's the URL to your /extras/curltest.php file?

What happens if you add ?paypal=1 to it?

[ctcentralinfo]

With:

http://www.cooltechcentral.com/extra...t.php?paypal=1

I get:

Array
(
[url] => "https://api-3t.paypal.com/nvp"
[content_type] => text/plain; charset=utf-8
[http_code] => 200
[header_size] => 197
[request_size] => 166
[filetime] => -1
[ssl_verify_result] => 0
[redirect_count] => 0
[total_time] => 0.517354
[namelookup_time] => 0.039624
[connect_time] => 0.105018
[pretransfer_time] => 0.384249
[size_upload] => 0
[size_download] => 146
[speed_download] => 282
[speed_upload] => 0
[download_content_length] => 146
[upload_content_length] => 0
[starttransfer_time] => 0.517053
[redirect_time] => 0
)



ACK=Failure&L_ERRORCODE0=81002&L_SHORTMESSAGE0=Unspecified%20Method&L_LONGMESSAG E0=Method%20Specified%20is%20not%20Supported&L_SEVERITYCODE0=ErrorEOF

[DrByte]

That all means your CURL communications to PayPal appears to be working fine for basic connectivity.

"When" are you getting the "52" errors?

[ctcentralinfo]

I received them via email, possibly when a customer tried to make a purchase.

[topcat24]

I have also been getting these today for some strange reason, still getting orders via paypal but have received the same error code from paypal, here is my code from the test
Array
(
[url] => "https://api-3t.paypal.com/nvp"
[content_type] => text/plain; charset=utf-8
[http_code] => 200
[header_size] => 153
[request_size] => 166
[filetime] => -1
[ssl_verify_result] => 19
[redirect_count] => 0
[total_time] => 0.624283
[namelookup_time] => 0.001468
[connect_time] => 0.15034
[pretransfer_time] => 0.451994
[size_upload] => 37
[size_download] => 146
[speed_download] => 233
[speed_upload] => 59
[download_content_length] => 146
[upload_content_length] => 0
[starttransfer_time] => 0.624152
[redirect_time] => 0
)


ACK=Failure&L_ERRORCODE0=81002&L_SHORTMESSAGE0=Unspecified%20Method&L_LONGMESSAG E0=Method%20Specified%20is%20not%20Supported&L_SEVERITYCODE0=ErrorEOF

running version 1.38a

[DrByte]

The details you posted confirm that your server is capable of talking to PayPal's server and getting a valid response back.

I'm assuming that you posted here because you were *also* getting "Error 52" emails?
Since I've never received an "Error 52" message in any of my testing, development, or live use, I can only assume that the cause is something broken in the files on your server.

You have stated that you're using a very old version of Zen Cart, which also has known security vulnerabilities. If you haven't patched that version using the patches published, then maybe you've been hacked. Even better, you should upgrade to get the benefit of hundreds of additional bugfixes, several of which are related to PayPal as well.