protected override void OnStatusResponseReceived(PopStatusResponse status)
{
if (status.Status == PopStatusIndicator.Positive) {
// 4. POP3 STARTTLS extension
// A TLS negotiation begins immediately after the CRLF at the
// end of the +OK response from the server. A -ERR response
// MAY result if a security layer is already active. Once a
// client issues a STLS command, it MUST NOT issue further
// commands until a server response is seen and the TLS
// negotiation is complete.
Connection.UpgradeStream(createAuthenticatedStreamCallback);
Connection.SetIsSecureConnection(true);
}
base.OnStatusResponseReceived(status);
}
public static string FromGreetingBanner(PopStatusResponse response)
{
/*
* 7. Optional POP3 Commands
* APOP
* A POP3 server which implements the APOP command will
* include a timestamp in its banner greeting. The syntax of
* the timestamp corresponds to the `msg-id' in [RFC822]
*/
var start = response.Text.IndexOf('<');
if (start < 0)
return null;
var end = response.Text.IndexOf('>', start);
if (end <= start)
throw new PopMalformedResponseException("invalid banner greeting");
return response.Text.Substring(start, end - start + 1);
}
/*
* 5. The TRANSACTION State
* LIST
* In order to simplify parsing, all POP3 servers are
* required to use a certain format for scan listings. A
* scan listing consists of the message-number of the
* message, followed by a single space and the exact size of
* the message in octets. Methods for calculating the exact
* size of the message are described in the "Message Format"
* section below. This memo makes no requirement on what
* follows the message size in the scan listing. Minimal
* implementations should just end that line of the response
* with a CRLF pair. More advanced implementations may
* include other information, as parsed from the message.
*/
public static PopScanListing FromList(PopStatusResponse response)
{
/*
* 5. The TRANSACTION State
* LIST
* If an argument was given and the POP3 server issues a
* positive response with a line containing information for
* that message. This line is called a "scan listing" for
* that message.
*/
return PopTextConverter.ToScanListing(SplitDataOrThrow(response, 2));
}
/*
* 7. Optional POP3 Commands
* UIDL
* In order to simplify parsing, all POP3 servers are required to
* use a certain format for unique-id listings. A unique-id
* listing consists of the message-number of the message,
* followed by a single space and the unique-id of the message.
* No information follows the unique-id in the unique-id listing.
*/
public static PopUniqueIdListing FromUidl(PopStatusResponse response)
{
/*
* 7. Optional POP3 Commands
* UIDL
* If an argument was given and the POP3 server issues a positive
* response with a line containing information for that message.
* This line is called a "unique-id listing" for that message.
*/
return PopTextConverter.ToUniqueIdListing(SplitDataOrThrow(response, 2));
}
public static PopDropListing FromStat(PopStatusResponse response)
{
/*
* 5. The TRANSACTION State
* STAT
* In order to simplify parsing, all POP3 servers are
* required to use a certain format for drop listings. The
* positive response consists of "+OK" followed by a single
* space, the number of messages in the maildrop, a single
* space, and the size of the maildrop in octets. This memo
* makes no requirement on what follows the maildrop size.
* Minimal implementations should just end that line of the
* response with a CRLF pair. More advanced implementations
* may include other information.
*/
return PopTextConverter.ToDropListing(SplitDataOrThrow(response, 2));
}