protected override void DoPullSetup()
{
this.handler = new PartHandler(Indexable,
delegate(string s)
{
AddLink(s);
});
using (GMime.Object mime_part = this.message.MimePart)
this.handler.OnEachPart(mime_part);
AddIndexables(this.handler.ChildIndexables);
}
private bool HasAttachments(GMime.Object mime_part)
{
if (mime_part is GMime.MessagePart)
{
return(true);
}
// Messages that are multipart/alternative shouldn't be considered as having
// attachments. Unless of course they do.
if (mime_part is GMime.Multipart && mime_part.ContentType.MediaSubtype.ToLower() != "alternative")
{
return(true);
}
return(false);
}
public void OnEachPart(GMime.Object mime_part)
{
GMime.Object part = null;
bool part_needs_dispose = false;
//for (int i = 0; i < this.depth; i++)
// Console.Write (" ");
//Console.WriteLine ("Content-Type: {0}", mime_part.ContentType);
++depth;
if (mime_part is GMime.MessagePart)
{
GMime.MessagePart msg_part = (GMime.MessagePart)mime_part;
using (GMime.Message message = msg_part.Message) {
using (GMime.Object subpart = message.MimePart)
this.OnEachPart(subpart);
}
}
else if (mime_part is GMime.Multipart)
{
GMime.Multipart multipart = (GMime.Multipart)mime_part;
int num_parts = multipart.Count;
// If the mimetype is multipart/alternative, we only want to index
// one part -- the richest one we can filter.
if (mime_part.ContentType.MediaSubtype.ToLower() == "alternative")
{
// The richest formats are at the end, so work from there
// backward.
for (int i = num_parts - 1; i >= 0; i--)
{
GMime.Object subpart = multipart[i];
if (IsMimeTypeHandled(subpart.ContentType.ToString()))
{
part = subpart;
part_needs_dispose = true;
break;
}
else
{
subpart.Dispose();
}
}
}
// If it's not alternative, or we don't know how to filter any of
// the parts, treat them like a bunch of attachments.
if (part == null)
{
for (int i = 0; i < num_parts; i++)
{
using (GMime.Object subpart = multipart[i])
this.OnEachPart(subpart);
}
}
}
else if (mime_part is GMime.Part)
{
part = mime_part;
}
else
{
throw new Exception(String.Format("Unknown part type: {0}", part.GetType()));
}
if (part != null)
{
System.IO.Stream stream = null;
using (GMime.DataWrapper content_obj = ((GMime.Part)part).ContentObject)
stream = content_obj.Stream;
// If this is the only part and it's plain text, we
// want to just attach it to our filter instead of
// creating a child indexable for it.
bool no_child_needed = false;
string mime_type = part.ContentType.ToString().ToLower();
if (this.depth == 1 && this.count == 0)
{
if (mime_type == "text/plain")
{
no_child_needed = true;
this.reader = new StreamReader(stream);
}
else if (mime_type == "text/html")
{
no_child_needed = true;
html_part = true;
string enc = part.ContentType.GetParameter("charset");
// DataWrapper.Stream is a very limited stream
// and does not allow Seek or Tell
// HtmlFilter requires Stream.Position=0.
// Play safe and create a memorystream
// for HTML parsing.
GMime.StreamMem mem_stream;
mem_stream = new GMime.StreamMem();
GMime.Stream data_stream;
data_stream = ((StreamWrapper)stream).GMimeStream;
data_stream.WriteToStream(mem_stream);
data_stream.Flush();
// The StreamWrapper and hence the memory_stream
// will be closed when the reader is closed
// after Pull()-ing is done.
System.IO.Stream html_stream;
html_stream = new StreamWrapper(mem_stream);
html_stream.Seek(0, SeekOrigin.Begin);
stream.Close();
try {
this.reader = FilterHtml.GetHtmlReader(html_stream, enc, link_handler);
} catch (Exception e) {
Log.Debug(e, "Exception while filtering HTML email {0}", this.indexable.Uri);
this.reader = null;
html_stream.Close();
html_part = false;
}
}
}
if (!no_child_needed)
{
// Check the mime type against the blacklist and don't index any
// parts that are contained within. That way the user doesn't
// get flooded with pointless signatures and vcard and ical
// attachments along with (real) attachments.
if (Array.IndexOf(blacklisted_mime_types, mime_type) == -1)
{
string sub_uri = "#" + this.count;
Indexable child;
child = new Indexable(UriFu.AddFragment(this.indexable.Uri, sub_uri, true));
child.DisplayUri = new Uri(this.indexable.DisplayUri.ToString() + "#" + this.count);
// This is a special case.
// Even for mails found on disk, MailMessage hitype is set
child.HitType = "MailMessage";
child.MimeType = mime_type;
// If this is the richest part we found for multipart emails, add its content to textcache
if (snippet_attachment ||
(this.depth == 1 && this.count == 0))
{
child.CacheContent = true;
}
else
{
child.CacheContent = false;
}
string filename = ((GMime.Part)part).Filename;
if (!String.IsNullOrEmpty(filename))
{
child.AddProperty(Property.NewKeyword("fixme:attachment_title", filename));
foreach (Property prop in Property.StandardFileProperties(filename, false))
{
child.AddProperty(prop);
}
}
// Store length of attachment
long length = stream.Length;
if (length != -1)
{
child.AddProperty(Property.NewUnsearched("fixme:filesize", length));
}
if (part.ContentType.MediaType.ToLower() == "text")
{
child.SetTextReader(new StreamReader(stream));
}
else
{
child.SetBinaryStream(stream);
}
child.SetChildOf(this.indexable);
child.StoreStream();
child.CloseStreams();
this.child_indexables.Add(child);
}
else
{
Log.Debug("Skipping attachment {0}#{1} with blacklisted mime type {2}",
this.indexable.Uri, this.count, mime_type);
}
}
this.count++;
}
if (part_needs_dispose)
{
part.Dispose();
}
--depth;
}
