/// <summary>
/// Visit the message contained within a message/rfc822 or message/news MIME entity.
/// </summary>
/// <remarks>
/// Visits the message contained within a message/rfc822 or message/news MIME entity.
/// </remarks>
/// <param name="entity">The message/rfc822 or message/news MIME entity.</param>
protected virtual void VisitMessage (MessagePart entity)
{
if (entity.Message != null)
entity.Message.Accept (this);
}
/// <summary>
/// Visit the message/rfc822 or message/news MIME entity.
/// </summary>
/// <remarks>
/// Visits the message/rfc822 or message/news MIME entity.
/// </remarks>
/// <example>
/// <code language="c#" source="Examples\MimeVisitorExamples.cs" region="HtmlPreviewVisitor" />
/// </example>
/// <param name="entity">The message/rfc822 or message/news MIME entity.</param>
protected internal virtual void VisitMessagePart (MessagePart entity)
{
VisitMimeEntity (entity);
VisitMessage (entity);
}
async Task <BoundaryType> ConstructMessagePartAsync(MessagePart part, CancellationToken cancellationToken)
{
BoundaryType found;
if (bounds.Count > 0)
{
int atleast = Math.Max(ReadAheadSize, GetMaxBoundaryLength());
if (await ReadAheadAsync(atleast, 0, cancellationToken).ConfigureAwait(false) <= 0)
{
return(BoundaryType.Eos);
}
unsafe
{
fixed(byte *inbuf = input)
{
byte *start = inbuf + inputIndex;
byte *inend = inbuf + inputEnd;
byte *inptr = start;
*inend = (byte)'\n';
while (*inptr != (byte)'\n')
{
inptr++;
}
found = CheckBoundary(inputIndex, start, (int)(inptr - start));
switch (found)
{
case BoundaryType.ImmediateEndBoundary:
case BoundaryType.ImmediateBoundary:
case BoundaryType.ParentBoundary:
return(found);
case BoundaryType.ParentEndBoundary:
// ignore "From " boundaries, broken mailers tend to include these...
if (!IsMboxMarker(start))
{
return(found);
}
break;
}
}
}
}
// parse the headers...
state = MimeParserState.MessageHeaders;
if (await StepAsync(cancellationToken).ConfigureAwait(false) == MimeParserState.Error)
{
// Note: this either means that StepHeaders() found the end of the stream
// or an invalid header field name at the start of the message headers,
// which likely means that this is not a valid MIME stream?
return(BoundaryType.Eos);
}
var message = new MimeMessage(options, headers, RfcComplianceMode.Loose);
var type = GetContentType(null);
if (preHeaderBuffer.Length > 0)
{
message.MboxMarker = new byte[preHeaderLength];
Buffer.BlockCopy(preHeaderBuffer, 0, message.MboxMarker, 0, preHeaderLength);
}
var entity = options.CreateEntity(type, headers, true);
message.Body = entity;
if (entity is Multipart)
{
found = await ConstructMultipartAsync((Multipart)entity, cancellationToken).ConfigureAwait(false);
}
else if (entity is MessagePart)
{
found = await ConstructMessagePartAsync((MessagePart)entity, cancellationToken).ConfigureAwait(false);
}
else
{
found = await ConstructMimePartAsync((MimePart)entity, cancellationToken).ConfigureAwait(false);
}
part.Message = message;
return(found);
}
protected override void VisitMessagePart(MessagePart entity)
{
// treat message/rfc822 parts as attachments
_attachments.Add(entity);
}
protected override void VisitMessagePart (MessagePart entity)
{
// don't descend into message/rfc822 parts
}
/// <summary>
/// Visit the message/rfc822 or message/news MIME entity.
/// </summary>
/// <remarks>
/// Visits the message/rfc822 or message/news MIME entity.
/// </remarks>
/// <example>
/// <code language="c#" source="Examples\MimeVisitorExamples.cs" region="HtmlPreviewVisitor" />
/// </example>
/// <param name="entity">The message/rfc822 or message/news MIME entity.</param>
protected internal virtual void VisitMessagePart(MessagePart entity)
{
VisitMimeEntity(entity);
VisitMessage(entity);
}
unsafe BoundaryType ConstructMessagePart(MessagePart part, byte* inbuf)
{
BoundaryType found;
if (bounds.Count > 0) {
int atleast = Math.Max (ReadAheadSize, GetMaxBoundaryLength ());
if (ReadAhead (inbuf, atleast, 0) <= 0)
return BoundaryType.Eos;
byte* start = inbuf + inputIndex;
byte* inend = inbuf + inputEnd;
byte* inptr = start;
*inend = (byte) '\n';
while (*inptr != (byte) '\n')
inptr++;
found = CheckBoundary (inputIndex, start, (int) (inptr - start));
switch (found) {
case BoundaryType.ImmediateEndBoundary:
case BoundaryType.ImmediateBoundary:
case BoundaryType.ParentBoundary:
return found;
case BoundaryType.ParentEndBoundary:
// ignore "From " boundaries, broken mailers tend to include these...
if (!IsMboxMarker (start))
return found;
break;
}
}
// parse the headers...
state = MimeParserState.Headers;
if (Step (inbuf) == MimeParserState.Error) {
// Note: this either means that StepHeaders() found the end of the stream
// or an invalid header field name at the start of the message headers,
// which likely means that this is not a valid MIME stream?
return BoundaryType.Eos;
}
var message = new MimeMessage (options, headers);
var type = GetContentType (null);
var entity = MimeEntity.Create (options, type, headers, true);
message.Body = entity;
if (entity is Multipart)
found = ConstructMultipart ((Multipart) entity, inbuf);
else if (entity is MessagePart)
found = ConstructMessagePart ((MessagePart) entity, inbuf);
else
found = ConstructMimePart ((MimePart) entity, inbuf);
part.Message = message;
return found;
}
async Task ConstructMessagePartAsync(MessagePart rfc822, int depth, CancellationToken cancellationToken)
{
var beginOffset = GetOffset(inputIndex);
var beginLineNumber = lineNumber;
if (bounds.Count > 0)
{
int atleast = Math.Max(ReadAheadSize, GetMaxBoundaryLength());
if (await ReadAheadAsync(atleast, 0, cancellationToken).ConfigureAwait(false) <= 0)
{
OnMimeContentOctets(rfc822, 0);
OnMimeContentLines(rfc822, 0);
boundary = BoundaryType.Eos;
return;
}
unsafe
{
fixed(byte *inbuf = input)
{
byte *start = inbuf + inputIndex;
byte *inend = inbuf + inputEnd;
byte *inptr = start;
*inend = (byte)'\n';
while (*inptr != (byte)'\n')
{
inptr++;
}
boundary = CheckBoundary(inputIndex, start, (int)(inptr - start));
switch (boundary)
{
case BoundaryType.ImmediateEndBoundary:
case BoundaryType.ImmediateBoundary:
case BoundaryType.ParentBoundary:
return;
case BoundaryType.ParentEndBoundary:
// ignore "From " boundaries, broken mailers tend to include these...
if (!IsMboxMarker(start))
{
OnMimeContentOctets(rfc822, 0);
OnMimeContentLines(rfc822, 0);
return;
}
break;
}
}
}
}
// parse the headers...
state = MimeParserState.MessageHeaders;
if (await StepAsync(cancellationToken).ConfigureAwait(false) == MimeParserState.Error)
{
// Note: this either means that StepHeaders() found the end of the stream
// or an invalid header field name at the start of the message headers,
// which likely means that this is not a valid MIME stream?
boundary = BoundaryType.Eos;
return;
}
var message = new MimeMessage(options, headers, RfcComplianceMode.Loose);
var type = GetContentType(null);
if (preHeaderBuffer.Length > 0)
{
message.MboxMarker = new byte[preHeaderLength];
Buffer.BlockCopy(preHeaderBuffer, 0, message.MboxMarker, 0, preHeaderLength);
}
var entity = options.CreateEntity(type, headers, true, depth);
message.Body = entity;
OnMimeMessageBegin(message, headerBlockBegin);
OnMimeEntityBegin(entity, headerBlockBegin);
OnMimeEntityHeadersEnd(entity, headerBlockEnd);
OnMimeMessageHeadersEnd(message, headerBlockEnd);
if (entity is Multipart)
{
await ConstructMultipartAsync((Multipart)entity, depth + 1, cancellationToken).ConfigureAwait(false);
}
else if (entity is MessagePart)
{
await ConstructMessagePartAsync((MessagePart)entity, depth + 1, cancellationToken).ConfigureAwait(false);
}
else
{
await ConstructMimePartAsync((MimePart)entity, cancellationToken).ConfigureAwait(false);
}
rfc822.Message = message;
var endOffset = GetEndOffset(inputIndex);
OnMimeEntityEnd(entity, endOffset);
OnMimeMessageEnd(message, endOffset);
OnMimeContentOctets(rfc822, endOffset - beginOffset);
OnMimeContentLines(rfc822, GetLineCount(beginLineNumber));
}
/// <summary>
/// Initialize a new instance of the <see cref="MimeMessageEndEventArgs"/> class.
/// </summary>
/// <remarks>
/// Creates a new <see cref="MimeMessageEndEventArgs"/>.
/// </remarks>
/// <param name="message">The message that was parsed.</param>
/// <param name="parent">The parent message part.</param>
/// <exception cref="ArgumentNullException">
/// <para><paramref name="message"/> is <c>null</c>.</para>
/// <para>-or-</para>
/// <para><paramref name="parent"/> is <c>null</c>.</para>
/// </exception>
public MimeMessageEndEventArgs(MimeMessage message, MessagePart parent) : base(message, parent)
{
}