The Annoyance Filter.pdf - Fourmilab

§194 ANNOYANCE-FILTER POP3 PROXY SERVER CLASS DEFINITION 165
void setFilterFunction (POP3ProxyFilterFunction ff )
{
filterFunction = ff ;
}
bool acceptConnections (int maxBacklog = 25);
bool serviceConnection (void);
bool operateProxyServer (int maxBacklog = 25);
};
#endif
195. Some of the POP3 protocol command return multiple-line responses, terminated with a line
containing a single “.” (text lines with this value are quoted by appending a single period). We
initialise the multiLine set with commands which always return multiple-line results and cMultiLine
with those which return multiple-line results when invoked with no arguments.
〈 Define multi-line and conditional multi-line commands 195 〉 ≡
multiLine .insert ("capa"); /∗ Extension in RFC 2449 ∗/
multiLine .insert ("retr");
multiLine .insert ("top");
cMultiLine .insert ("list");
cMultiLine .insert ("uidl");
This code is used in section 194.
196. The requestor is supposed to define all the properties of the POP3 connection before it is opened.
Here we check for violations of this rule and chastise offenders.
〈 Check for POP3 connection already opened 196 〉 ≡
#ifndef NDEBUG
if (opened ) {
cerr ≪ "Attempt␣to␣modify␣POP3␣connection␣settings␣after␣connection␣opened." ≪ endl ;
abort ( );
}
#endif
This code is used in section 194.