how to do Header Authentication from file or from smart card lazarus / 38-Networking and Web Programming ---------------------------------------------------------------------- ministerminister ยท 2021-09-23 10:31 Hello, This is my first time to address on Lazarus Forum. I have an issue with https and it is how to do authentication from header from pfx file? I know how to work it with Tokken. But I have to authenticate on https from pfx file. httpClient.AddHeader('Authentication',VAR_LLL); VAR_LLL is string and a I need it to be from file. Hope you understand the question... Thanks in advance..