Date
property Date: TDateTime read;
Example
procedure ScriptEvent(var Value: variant);
begin
if (Request <> nil) and (Request.Date >= 0) then
Value := Request.Date
else
Value := 0;
end;
Usage
Parses the first Date request-header value to TDateTime, returning -1 when absent and raising on invalid nonempty syntax.
Additional Technical Info
Date looks up the first Date request-header value through Indy and passes it to WebBroker date parsing. If the selected value is empty, the bridge returns -1. This sentinel means absent/unavailable; it is not a valid received timestamp and is different from Delphi TDateTime zero.
Normal HTTP-date text begins with a weekday name. WebBroker sends that form through RFC822ToDate(Value, True), so the numerical TDateTime represents UTC but carries no timezone marker. Numeric-leading obsolete forms use WebBroker's older parser, which recognises limited English month layouts, maps a two-digit year into the 2000s and does not apply timezone conversion.
Invalid nonempty text can raise a date/format/range exception. Reading the property is therefore not a safe Boolean validity test; isolate it where malformed caller input must become a controlled client error. Do not use Date as the Velox receipt time, replay prevention, authentication evidence or a trusted business timestamp. A caller or intermediary can omit or alter it.
Copy a successfully parsed value immediately if later logic needs it, record separately whether the sentinel was present, and apply explicit freshness/skew rules only within a designed signed protocol. Test Request for nil.
External references
Created 2026-07-15