Skip to main content

fatNone

fatNone = 0

Example​

procedure ConfigureAnonymous(Client: TvxHTTP);
begin
  Client.AuthType := fatNone;
  Client.ClearAuthentication;
end;

Usage​

fatNone disables Velox's local authentication handler for the receiving client while leaving transport security and application-level credentials separate.

Additional Technical Info​

fatNone is ordinal 0 of TvxAuthType and is the default for new HTTP/transport objects. For TvxHTTP, configuration removes authorization callbacks, frees the current request Authentication object and clears the request Username/Password fields.

It means “do not use this Velox authentication mechanism,” not “the complete request contains no credentials.” Caller-supplied headers, cookies, client certificates, URL query values and request-body/form fields remain separate. In particular, outbound multipart HTTP code can add configured username/password as form fields in its fatNone branch; those are application data rather than an Authorization scheme.

Behavior and boundaries​

  • Assigning the constant changes only the receiver's selection. Cleanup occurs when authentication is configured or ClearAuthentication is called.
  • It does not turn TLS on or off and does not weaken/strengthen certificate validation by itself.
  • A server may still challenge and reject the request. Velox has no selected local handler to satisfy it.
  • Do not assume that switching from another member erases every String copy held by configuration, logs or caller variables.
  • Provider-table placeholders for fatNone contain Login/Plain classes, but HTTP explicitly selects no authentication and common transports have their own branching. Read the selected surface's documentation rather than treating the provider table as universal behavior.
  • If a custom Authorization header is deliberately supplied, document that separately so reviewers do not infer anonymous access from fatNone.

The constant is safe to read/compare and has no effect until assigned/consumed. The example performs no request and was source-reviewed; no anonymous endpoint, credential, network or image-function test was executed.

Related Code Library entries

Created 2026-07-15