Source of binaries is unclear

[jpluimers]

The source of the binaries in https://github.com/grijjy/DelphiScalableClientSockets/tree/master/Bin is unclear.

Please add information where they have been obtained from and how to obtain the latest version compatible with DelphiScalableClientSockets

ngHttp2.dll does not have any version information (unlike for instance https://windows.php.net/downloads/releases/php-7.2.7-Win32-VC15-x86.zip via https://windows.php.net/download which does include version information).

Indy compatible OpenSSL libraries can be downloaded from https://indy.fulgan.com/SSL/ which seem plug-in compatible with DelphiScalableClientSockets.

[jpluimers]

@erikvanbilsen can you take a look into this?

[allendrennan]

We built ngHttp2 from the normal build instructions located at http://nghttp2.org/. There is another article we published that covers the process of building it,
https://github.com/grijjy/DelphiRemotePushSender

As far as OpenSSL, the version we published follows the same requirements as Indy for dynamic linking. OpenSSL is supposed to use a common shared library on the system for all applications. Developers should not be building it themselves. In practice this isn't always the case. The scope of building, making and installing OpenSSL instructions for every possible platform would be a very large blog article all by itself and doing it specifically so it works with Delphi nuances (like 32bit macOS) is even more detailed.

OpenSSL that is widely used with Delphi is still 1.0.2x on most platforms and this will be depreciated by OpenSSL soon. We have successfully built a workable 1.1.1a version that works on all Delphi platforms (Win32, Win64, Linux, Android, iOS and macOS) although this required a complete rewrite of the way we are dynamically binding and using OpenSSL. Is our intention to eventually update the existing example to use it along with an article specific to using OpenSSL 1.1.1a with Delphi on all platforms.