void FetchSummaryItems (ImapEngine engine, ImapCommand ic, int index)
{
var token = engine.ReadToken (ic.CancellationToken);
if (token.Type != ImapTokenType.OpenParen)
throw ImapEngine.UnexpectedToken (token, false);
var ctx = (FetchSummaryContext) ic.UserData;
IMessageSummary isummary;
MessageSummary summary;
if (!ctx.Results.TryGetValue (index, out isummary)) {
summary = new MessageSummary (index);
ctx.Results.Add (index, summary);
} else {
summary = (MessageSummary) isummary;
}
do {
token = engine.ReadToken (ic.CancellationToken);
if (token.Type == ImapTokenType.CloseParen || token.Type == ImapTokenType.Eoln)
break;
if (token.Type != ImapTokenType.Atom)
throw ImapEngine.UnexpectedToken (token, false);
var atom = (string) token.Value;
ulong value64;
uint value;
switch (atom) {
case "INTERNALDATE":
token = engine.ReadToken (ic.CancellationToken);
switch (token.Type) {
case ImapTokenType.QString:
case ImapTokenType.Atom:
summary.InternalDate = ImapUtils.ParseInternalDate ((string) token.Value);
break;
case ImapTokenType.Nil:
summary.InternalDate = null;
break;
default:
throw ImapEngine.UnexpectedToken (token, false);
}
summary.Fields |= MessageSummaryItems.InternalDate;
break;
case "RFC822.SIZE":
token = engine.ReadToken (ic.CancellationToken);
if (token.Type != ImapTokenType.Atom || !uint.TryParse ((string) token.Value, out value))
throw ImapEngine.UnexpectedToken (token, false);
summary.Fields |= MessageSummaryItems.MessageSize;
summary.MessageSize = value;
break;
case "BODYSTRUCTURE":
summary.Body = ImapUtils.ParseBody (engine, string.Empty, ic.CancellationToken);
summary.Fields |= MessageSummaryItems.BodyStructure;
break;
case "BODY":
token = engine.PeekToken (ic.CancellationToken);
if (token.Type == ImapTokenType.OpenBracket) {
// consume the '['
token = engine.ReadToken (ic.CancellationToken);
if (token.Type != ImapTokenType.OpenBracket)
throw ImapEngine.UnexpectedToken (token, false);
// References were requested...
do {
token = engine.ReadToken (ic.CancellationToken);
if (token.Type == ImapTokenType.CloseBracket)
break;
if (token.Type == ImapTokenType.OpenParen) {
do {
token = engine.ReadToken (ic.CancellationToken);
if (token.Type == ImapTokenType.CloseParen)
break;
// the header field names will generally be atoms or qstrings but may also be literals
switch (token.Type) {
case ImapTokenType.Literal:
engine.ReadLiteral (ic.CancellationToken);
break;
case ImapTokenType.QString:
case ImapTokenType.Atom:
break;
default:
throw ImapEngine.UnexpectedToken (token, false);
}
} while (true);
} else if (token.Type != ImapTokenType.Atom) {
throw ImapEngine.UnexpectedToken (token, false);
}
} while (true);
if (token.Type != ImapTokenType.CloseBracket)
throw ImapEngine.UnexpectedToken (token, false);
token = engine.ReadToken (ic.CancellationToken);
if (token.Type != ImapTokenType.Literal)
throw ImapEngine.UnexpectedToken (token, false);
try {
var message = engine.ParseMessage (engine.Stream, false, ic.CancellationToken);
summary.Fields |= MessageSummaryItems.References;
summary.References = message.References;
summary.Headers = message.Headers;
} catch (FormatException) {
// consume any remaining literal data...
ReadLiteralData (engine, ic.CancellationToken);
}
} else {
summary.Fields |= MessageSummaryItems.Body;
try {
summary.Body = ImapUtils.ParseBody (engine, string.Empty, ic.CancellationToken);
} catch (ImapProtocolException ex) {
if (!ex.UnexpectedToken)
throw;
// Note: GMail's IMAP implementation sometimes replies with completely broken BODY values
// (see issue #32 for the `BODY ("ALTERNATIVE")` example), so to work around this nonsense,
// we need to drop the remainder of this line.
do {
token = engine.PeekToken (ic.CancellationToken);
if (token.Type == ImapTokenType.Eoln)
break;
token = engine.ReadToken (ic.CancellationToken);
if (token.Type == ImapTokenType.Literal)
ReadLiteralData (engine, ic.CancellationToken);
} while (true);
return;
}
}
break;
case "ENVELOPE":
summary.Envelope = ImapUtils.ParseEnvelope (engine, ic.CancellationToken);
summary.Fields |= MessageSummaryItems.Envelope;
break;
case "FLAGS":
summary.Flags = ImapUtils.ParseFlagsList (engine, summary.UserFlags, ic.CancellationToken);
summary.Fields |= MessageSummaryItems.Flags;
break;
case "MODSEQ":
token = engine.ReadToken (ic.CancellationToken);
if (token.Type != ImapTokenType.OpenParen)
throw ImapEngine.UnexpectedToken (token, false);
token = engine.ReadToken (ic.CancellationToken);
if (token.Type != ImapTokenType.Atom || !ulong.TryParse ((string) token.Value, out value64) || value64 == 0)
throw ImapEngine.UnexpectedToken (token, false);
token = engine.ReadToken (ic.CancellationToken);
if (token.Type != ImapTokenType.CloseParen)
throw ImapEngine.UnexpectedToken (token, false);
summary.Fields |= MessageSummaryItems.ModSeq;
summary.ModSeq = value64;
break;
case "UID":
token = engine.ReadToken (ic.CancellationToken);
if (token.Type != ImapTokenType.Atom || !uint.TryParse ((string) token.Value, out value) || value == 0)
throw ImapEngine.UnexpectedToken (token, false);
summary.UniqueId = new UniqueId (ic.Folder.UidValidity, value);
summary.Fields |= MessageSummaryItems.UniqueId;
break;
case "X-GM-MSGID":
token = engine.ReadToken (ic.CancellationToken);
if (token.Type != ImapTokenType.Atom || !ulong.TryParse ((string) token.Value, out value64) || value64 == 0)
throw ImapEngine.UnexpectedToken (token, false);
summary.Fields |= MessageSummaryItems.GMailMessageId;
summary.GMailMessageId = value64;
break;
case "X-GM-THRID":
token = engine.ReadToken (ic.CancellationToken);
if (token.Type != ImapTokenType.Atom || !ulong.TryParse ((string) token.Value, out value64) || value64 == 0)
throw ImapEngine.UnexpectedToken (token, false);
summary.Fields |= MessageSummaryItems.GMailThreadId;
summary.GMailThreadId = value64;
break;
case "X-GM-LABELS":
summary.GMailLabels = ImapUtils.ParseLabelsList (engine, ic.CancellationToken);
summary.Fields |= MessageSummaryItems.GMailLabels;
break;
default:
throw ImapEngine.UnexpectedToken (token, false);
}
} while (true);
if (token.Type != ImapTokenType.CloseParen)
throw ImapEngine.UnexpectedToken (token, false);
if ((ctx.RequestedItems & summary.Fields) == ctx.RequestedItems)
OnMessageSummaryFetched (summary);
}