Hi @egadsby,
OJS passes the http_proxy and https_proxy configuration options into the Guzzle client’s constructor and Guzzle deals with the details from there. (Guzzle is the 3rd party library that we use for making HTTP/HTTPS requests from within OJS/OMP/OPS; it relies on curl when available, as in your case, but has other options when it isn’t.)
The message you’re getting is from curl, indicating that something went wrong during the protocol handshake when it tried to contact the proxy server. From the thread, you might try using a http URL (rather than https) in the https_proxy option, but the details will depend on your proxy server, and I’m just guessing.
If you can’t get this going and want to test your proxy configuration with Guzzle outside of the OJS environment, you could start working with a basic Guzzle example script.
Regards,
Alec Smecher
Public Knowledge Project Team