static async Task CapaHandler(Pop3Engine engine, Pop3Command pc, string text, bool doAsync)
{
if (pc.Status != Pop3CommandStatus.Ok)
{
return;
}
string response;
do
{
if ((response = await engine.ReadLineAsync(doAsync, pc.CancellationToken).ConfigureAwait(false)) == ".")
{
break;
}
int index = response.IndexOf(' ');
string token, data;
int value;
if (index != -1)
{
token = response.Substring(0, index);
while (index < response.Length && char.IsWhiteSpace(response[index]))
{
index++;
}
if (index < response.Length)
{
data = response.Substring(index);
}
else
{
data = string.Empty;
}
}
else
{
data = string.Empty;
token = response;
}
switch (token)
{
case "EXPIRE":
engine.Capabilities |= Pop3Capabilities.Expire;
var tokens = data.Split(' ');
if (int.TryParse(tokens[0], NumberStyles.None, CultureInfo.InvariantCulture, out value))
{
engine.ExpirePolicy = value;
}
else if (tokens[0] == "NEVER")
{
engine.ExpirePolicy = -1;
}
break;
case "IMPLEMENTATION":
engine.Implementation = data;
break;
case "LOGIN-DELAY":
if (int.TryParse(data, NumberStyles.None, CultureInfo.InvariantCulture, out value))
{
engine.Capabilities |= Pop3Capabilities.LoginDelay;
engine.LoginDelay = value;
}
break;
case "PIPELINING":
engine.Capabilities |= Pop3Capabilities.Pipelining;
break;
case "RESP-CODES":
engine.Capabilities |= Pop3Capabilities.ResponseCodes;
break;
case "SASL":
engine.Capabilities |= Pop3Capabilities.Sasl;
foreach (var authmech in data.Split(new [] { ' ' }, StringSplitOptions.RemoveEmptyEntries))
{
engine.AuthenticationMechanisms.Add(authmech);
}
break;
case "STLS":
engine.Capabilities |= Pop3Capabilities.StartTLS;
break;
case "TOP":
engine.Capabilities |= Pop3Capabilities.Top;
break;
case "UIDL":
engine.Capabilities |= Pop3Capabilities.UIDL;
break;
case "USER":
engine.Capabilities |= Pop3Capabilities.User;
break;
case "UTF8":
engine.Capabilities |= Pop3Capabilities.UTF8;
foreach (var item in data.Split(' '))
{
if (item == "USER")
{
engine.Capabilities |= Pop3Capabilities.UTF8User;
}
}
break;
case "LANG":
engine.Capabilities |= Pop3Capabilities.Lang;
break;
}
} while (true);
}
static async Task CapaHandler(Pop3Engine engine, Pop3Command pc, string text, bool doAsync)
{
if (pc.Status != Pop3CommandStatus.Ok)
{
return;
}
string response;
do
{
if ((response = await engine.ReadLineAsync(doAsync, pc.CancellationToken).ConfigureAwait(false)) == ".")
{
break;
}
int index = response.IndexOf(' ');
int startIndex, length, value;
if (index == -1)
{
index = response.Length;
}
if (IsCapability("EXPIRE", response, index, true))
{
engine.Capabilities |= Pop3Capabilities.Expire;
if (ReadNextToken(response, ref index, out startIndex, out length))
{
if (IsToken("NEVER", response, startIndex, length))
{
engine.ExpirePolicy = -1;
}
else if (TryParseInt32(response, startIndex, length, out value))
{
engine.ExpirePolicy = value;
}
}
}
else if (IsCapability("IMPLEMENTATION", response, index, true))
{
engine.Implementation = response.Substring(index + 1);
}
else if (IsCapability("LANG", response, index))
{
engine.Capabilities |= Pop3Capabilities.Lang;
}
else if (IsCapability("LOGIN-DELAY", response, index, true))
{
if (ReadNextToken(response, ref index, out startIndex, out length))
{
if (TryParseInt32(response, startIndex, length, out value))
{
engine.Capabilities |= Pop3Capabilities.LoginDelay;
engine.LoginDelay = value;
}
}
}
else if (IsCapability("PIPELINING", response, index))
{
engine.Capabilities |= Pop3Capabilities.Pipelining;
}
else if (IsCapability("RESP-CODES", response, index))
{
engine.Capabilities |= Pop3Capabilities.ResponseCodes;
}
else if (IsCapability("SASL", response, index, true))
{
engine.Capabilities |= Pop3Capabilities.Sasl;
engine.AddAuthenticationMechanisms(response, index);
}
else if (IsCapability("STLS", response, index))
{
engine.Capabilities |= Pop3Capabilities.StartTLS;
}
else if (IsCapability("TOP", response, index))
{
engine.Capabilities |= Pop3Capabilities.Top;
}
else if (IsCapability("UIDL", response, index))
{
engine.Capabilities |= Pop3Capabilities.UIDL;
}
else if (IsCapability("USER", response, index))
{
engine.Capabilities |= Pop3Capabilities.User;
}
else if (IsCapability("UTF8", response, index, true))
{
engine.Capabilities |= Pop3Capabilities.UTF8;
while (ReadNextToken(response, ref index, out startIndex, out length))
{
if (IsToken("USER", response, startIndex, length))
{
engine.Capabilities |= Pop3Capabilities.UTF8User;
}
}
}
} while (true);
}
