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LastModified

property LastModified: TDateTime read write;

Example​

procedure ScriptEvent(var Value: variant);
begin
  if Response <> nil then
  begin
    { Omit unless the representation has a reliable modification time. }
    Response.LastModified := -1;
    Value := Response.LastModified;
  end;
end;

Usage​

LastModified gets or sets a UTC representation-modification time, emitting Last-Modified only for an effective positive Velox value.

Additional Technical Info​

LastModified supplies metadata for when the selected representation was last changed. The valid response constructor initialises it to -1.

The script value is treated as UTC by this bridge. Set converts UTC to server-local time for Indy; get converts the stored local value to UTC. -1 is preserved and reliably omits the field. Indy emits only a stored local value greater than zero; because other values are converted first, zero can become positive east of UTC and emit an ancient 1899 date.

Set the property only from a reliable source modification time for the exact response representation. It does not compare Request.IfModifiedSince, automatically produce 304, generate an ETag or stop the body. Conditional handling and validator precedence must be implemented as a coherent endpoint policy.

HTTP dates have one-second granularity, while TDateTime can hold fractions below a second; clients/caches can therefore observe a rounded value. The timezone-free UTC convention and local conversion can be ambiguous around daylight-saving transitions. Assignment accepts any representable value without checking chronology.

Test Response for nil.

External references

Created 2026-07-15