Add OpenSSL support

[getnamo]

Current libs do not have openssl compiled in. Need to check the settings to get openssl built for socket.io client cpp.

Edit: Current SSL support available in https://github.com/getnamo/socketio-client-ue4/tree/ssl branch

[getnamo]

might be related to why #14 is occuring

[jostster]

@getnamo does this mean https is not supported?

[getnamo]

I believe so, but some tests to confirm would be useful.

[jostster]

@getnamo yes, we moved our server to https. Socket.io then stopped working. We then opened up another instance on regular http port 80 and it works fine. It seems that inside the socketio.lib file is where the issue is, yet we don't have the pdb's to debug in there further. Do you have an ETA on when you will have an ssl supported version?

[getnamo]

Thanks for confirming!

I don't currently have an eta on SSL, but now that I know there is demand for it I'll add it to the list. That said the underlying .lib that gets compiled is also open source with its repo here: https://github.com/getnamo/socketio-client-prebuild which has the cmake script shown here: https://github.com/getnamo/socket.io-client-cpp/blob/bfa0a53a4851cbbd56d4606c6d6fbed3f81a964b/CMakeLists.txt#L51 if I remember correctly, I didn't have OPENSSL library installed in the correct location on my computer when I was building the socket.io library. based on the above script, it does appear that everything else is already ready for it. If you need it badly, consider contributing by updating the underlying .lib to include the OpenSSL libs!

Also as a side note you can get the .pdbs easily by compiling the plugin in a UE4 c++ project, which will recompile the plugin and generate the .pdbs.

[anadin]

I'm gonna jump in on this one - I'm at a bit of a loss, I do have openSSL installed so I think the boost libs compiled ok. (macOS). I expect and need to use ws:// or wss:// for the URL not sure where to make that change :(

[getnamo]

@anadin See the discussion here: #72 (comment) for the latest development on integrating openssl. It appears MykonCodes was able to enable it, but it stopped non-ssl version connections from working. His implementation should give you a basis to explore good ssl support however.

[getnamo]

Note to self: with refactor, we can likely use the built-in openssl module: https://github.com/EpicGames/UnrealEngine/tree/release/Engine/Source/ThirdParty/OpenSSL. TBC

[getnamo]

Note to self: merge e.g. socketio/socket.io-client-cpp#137 into base