Topic Path: Symbol Reference > Classes > TIdAuthentication Class > TIdAuthentication Methods > KeepAlive Method
Indicates that Keep-Alive signals are supported for the authentication mechanism.
function KeepAlive: Boolean; virtual; abstract;
Boolean - True when the KEEP-ALIVE header is supported for the authentication scheme.
KeepAlive is an abstract virtual Boolean function that specifies the function used to indicate if the authentication mechanism supports use of the KEEP-ALIVE header. Descendant classes, like TIdBasicAuthentication, must implement the KeepAlive function to indicate if the mechanism can be used to prevent loss of a connection during authentication processing.
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Pascal