HTTP Protocol Related Improvements in Delphi 10.2.2

After years of (peer) pressure, Embarcadero finally did some client-side [WayBack] HTTP Protocol Related Improvements in Delphi 10.2.2.

The fixes add some features to THTTPClient that have been available in Indy since version 9 (which however requires 1.0.2 OpenSSL binaries support the required functionality):

We have added a new enumeration, THTTPSecureProtocol with the values (SSL2, SSL3, TLS1, TLS11, TLS12). THPPTClient and related classes have now a SecureProtocols property which is a set based on that enumeration.

References:

• [WayBack] System.Net.HttpClient.THTTPSecureProtocol – RAD Studio API Documentation
• [WayBack] System.Net.HttpClient.THTTPSecureProtocols – RAD Studio API Documentation
• [WayBack] System.Net.HttpClient.THTTPClient Properties – RAD Studio API Documentation does not include SecureProtocols (yet?)
• RAD Studio/RSP-18713: Add a secure protocol options to THTTPClient (cannot be archived)
• RAD Studio/RSP-18104: THttpClient with TLS1.1 and TLS1.2 on older Windows systems (cannot be archived)
• [WayBack] Indy 9 with Delphi: How to enable TLS 1.0? – Stack Overflow
• [WayBack] Embarcadero Discussion Forums: Indy v10, TLS v1.2, and OpenSSL …
• [WayBack] delphi – Using Indy 10 IdHTTP with TLS 1.2 – Stack Overflow
• [WayBack] [SOLVED] Indy and SSL
• [WayBack] Indy 9

–jeroen