December 23, 2020

Groupe "Développeurs Delphi et Pascal" francophone

 Le groupe "Développeurs Delphi et Pascal" vient d'être fondé sur LinkedIn.

C'est un groupe destiné à réunir les développeurs francophones qui utilisent Delphi ou le langage Pascal. Vous pouvez y poster - en Français - des questions techniques et des spécialistes vous aideront.

Bienvenue à tous !

December 19, 2020

ICS V8.65 announced

 ICS V8.65 has been released at:

ICS is a free internet component library for Delphi 7, 2006 to 2010, XE to XE8, 10 Seattle, 10.1 Berlin, 10.2 Tokyo, 10.3 Rio and 10.4 Sydney, and C++ Builder 2006 to XE3, 10.2 Tokyo, 10.3 Rio and 10.4 Sydney. ICS supports VCL and FMX, Win32, Win64 and MacOS 32-bit targets.

The distribution zip includes the latest OpenSSL 1.1.1i win32, with other versions of OpenSSL being available from the download page.

Major Changes in ICS V8.65 include:

1 - The ReadMe8.txt file has a new 'Getting Started with ICS' section listing the types of projects ICS may be used for, and suggesting the correct components to use, and their related sample applications for  testing.  This is recommended reading for anyone doing new ICS development since it discusses all the new high level components like TSslHttpRest added in the last few years which can reduce development effort considerably.  It may also be viewed at:

2 - Added new TIcsRestEmail component that provides basic support for Google and Microsoft Outlook email REST APIs including OAuth2 login and refresh to get an access token for SMTP and POP3 XOAuth2 and 0AuthBearer authentication. TIcsRestEmail has methods to send and read email, to list IDs in a mailbox, read headers and message bodies by ID, send emails and delete emails.

3 - The SMPT, POP3 and MailQueue samples all now support XOAuth2 and 0AuthBearer authentication using the TIcsRestEmail component. The low level component call an event to get the authentication access token, which is provided by IcsRestEmail, together with a refresh token which is saved  instead of a password.

4 - To access email using REST APIs or OAuth2/SMTP/POP3 an 'application account' needs to be created though the Google or Microsoft provider console.

5 - Added a new TIcsTwitter component and sample, requires a developer account from Twitter. Includes login to Twitter, send tweet, search tweets and get specific tweets, all responses are Json which the application needs to untangle.

6 - Improved TRestParams allowing them to save more Delphi types correctly without conversion to strings, and to save parameters in new formats.

7 - There are various OAuth2 improvements to make it easier to implement. Added several TOAuthUri records designed to set-up common OAuth2 account  settings for providers like Google, Twitter, Microsoft  and Sipgate, by using the LoadAuthUri method.

8 - TSimpleWebSrv continues to get less simple, it has aWebSrvIP2 property for a second address so it can listen on IPv4 and IPv6 at the same time, with and without SSL if necessary.  Setting WebSrvIP to localhost sets both and [::1] so the browser OAuth2 redirect can choose IPv4 or IPv6.

9 - Made some improvements to SuperObject, used for Json creation and parsing.  When parsing Json there are new functions that return a sensible error message about parse errors and the location.  There is a new object type DateTime or DT which reads or writes TDateTime to avoid the application needing to do the ISO string conversion. Json can now be parsed to a depth of 64 levels.

10 - Rewrote and improved the way ICS reads SSL/TLS certificates and bundles, simplifying code that has got partly duplicated over the years as new methods were added, and improving error handling so the infamous stack error should no longer appear, instead more useful messages.  All certificate files are now written with the UTF8 character set for the added comments that may include non-ASCII characters.

11 - All the ICS root bundles are now created cleanly by an application, rather than mostly manually by copy and editing, to reduce errors. This fixed four corrupted root certificates in the older bundles, see

12 - Previously the Jose unit offered functions primarily for client JWS/JWT REST applications, it now includes extra functions for REST servers to check and verify the JWS/JWT sent by clients.  The Jose sample application has new tests for JWS/JWT, and to parse and display Json.

13 - Added a new Multi Host FTP Server sample using IcsHosts. Really designed to be a Windows service application. It supports multiple SSL hosts with multiple listeners, can order it's own SSL certificates and will create self signed certificates for any missing,  and will email status information and errors to an administrator.

14 - Fixed a long term external SSL session cache issue in some components and samples that meant if an SSL handshake fails due to a bad certificate or chain, it is necessary to remove the SSL session from cache so an immediate retry does not succeed by skipping the certificate checks. This is only a short term issue, because the cache is usually cleared after a few minutes. This will effect any client applications using the external SSL session cache including HTTPS.

15 - Increased the TCP send and receive buffer size to 64K in all components and samples, and generally don't allow it to be set lower.  Unfortunately the default buffer size never kept up with faster internet speeds which meant some components transferred data slowly.

16 - Made some improvements ordering SSL/TLS certificates. Made Windows Server DNS updating using WMI more robust so wild card Acme orders work reliably.

17 - Made some internal changes loading OpenSSL, to avoid the two DLLs being loaded from different directories and to give better exceptions if they are missing.

More detailed release notes are at:

To get help, use the forum:

December 13, 2020

Logitech Gaming LED SDK for Delphi

You've got a LED illuminated keyboard, mouse or headset from Logitech? Then using Logitech Gaming LED SDK, you'll be able to make illuminations on your Logitech hardware supporting that feature. For example, you may assign colors to keys on the keyboard, make it flash or pulse.

Full source code, including demos on Github:

Minimalist example:

    LogitechLedLib in 'LogitechLedLib.pas';
    WriteLn('Your keyboard is pulsing for 5 seconds...');
    LogiLed.InitWithName('Logitech LED Delphi Console Demo');
    LogiLed.PulseLighting(100, 90, 60, 5000, 200);
    WriteLn('Hit RETURN');