private System.String ReplaceUrlTokens(System.String url, SharpAttachment attachment)
{
if (string.IsNullOrEmpty(url) || url.IndexOf('[') == -1 || url.IndexOf(']') == -1)
return url;
if (url.IndexOf("[MessageID]", System.StringComparison.Ordinal) != -1)
{
url = url.Replace("[MessageID]", System.Web.HttpUtility.UrlEncode(MimeTools.Rfc2392Url(this.MessageID)));
}
if (attachment != null && attachment.ContentID != null)
{
if (url.IndexOf("[ContentID]", System.StringComparison.Ordinal) != -1)
{
url = url.Replace("[ContentID]", System.Web.HttpUtility.UrlEncode(MimeTools.Rfc2392Url(attachment.ContentID)));
}
if (url.IndexOf("[Name]", System.StringComparison.Ordinal) != -1)
{
url = url.Replace("[Name]", attachment.SavedFile != null ? System.Web.HttpUtility.UrlEncode(attachment.SavedFile.Name) : System.Web.HttpUtility.UrlEncode(attachment.Name));
}
}
return url;
}
private void UuDecode(System.String path)
{
if (this._body.Length == 0 || this._body.IndexOf("begin ", System.StringComparison.Ordinal) == -1 || this._body.IndexOf("end", System.StringComparison.Ordinal) == -1)
return;
System.Text.StringBuilder sb = new System.Text.StringBuilder();
System.IO.StringReader reader = new System.IO.StringReader(this._body);
System.IO.Stream stream = null;
SharpAttachment attachment = null;
for (System.String line = reader.ReadLine(); line != null; line = reader.ReadLine())
{
if (stream == null)
{
// Found the start point of uuencoded content
if (line.Length > 10 && line[0] == 'b' && line[1] == 'e' && line[2] == 'g' && line[3] == 'i' && line[4] == 'n' && line[5] == ' ' && line[9] == ' ')
{
System.String name = System.IO.Path.GetFileName(line.Substring(10));
System.Console.WriteLine(System.String.Concat("uuencoded content found. name[", name, "]"));
// In-Memory decoding
if (path == null)
{
attachment = new SharpAttachment(new System.IO.MemoryStream());
stream = attachment.Stream;
// Filesystem decoding
}
else
{
attachment = new SharpAttachment(new System.IO.FileInfo(System.IO.Path.Combine(path, name)));
stream = attachment.SavedFile.OpenWrite();
}
attachment.Name = name;
// Not uuencoded line, so add it to new body
}
else
{
sb.Append(line);
sb.Append(System.Environment.NewLine);
}
}
else
{
// Content finished
if (line.Length == 3 && line == "end")
{
stream.Flush();
if (stream.Length > 0)
{
System.Console.WriteLine(System.String.Concat("uuencoded content finished. name[", attachment.Name, "] size[", stream.Length, "]"));
attachment.Size = stream.Length;
this._attachments.Add(attachment);
}
// When decoding to a file, close the stream.
if (attachment.SavedFile != null || stream.Length == 0)
{
stream.Close();
}
attachment = null;
stream = null;
// Decode and write uuencoded line
}
else
{
MimeTools.UuDecodeLine(line, stream);
}
}
}
if (stream != null && stream.CanRead)
{
stream.Close();
}
reader.Close();
this._body = sb.ToString();
}
private void ParseMessage(MimeMessage part, MimeTopLevelMediaType types, bool html, DecodeOptions options, System.String preferredtextsubtype, System.String path)
{
if ((types & part.Header.TopLevelMediaType) != part.Header.TopLevelMediaType)
{
return;
}
switch (part.Header.TopLevelMediaType)
{
case MimeTopLevelMediaType.multipart:
case MimeTopLevelMediaType.message:
// TODO: allow other subtypes of "message"
// Only message/rfc822 allowed, other subtypes ignored
if (part.Header.TopLevelMediaType.Equals(MimeTopLevelMediaType.message)
&& !part.Header.SubType.Equals("rfc822"))
break;
if (part.Header.SubType.Equals("alternative"))
{
if (part.PartsCount > 0)
{
MimeMessage altenative = null;
// Get the first mime part of the alternatives that has a accepted Mime-Type
for (int i = part.PartsCount; i > 0; i--)
{
MimeMessage item = part.GetPart(i - 1);
if ((types & part.Header.TopLevelMediaType) != part.Header.TopLevelMediaType
|| (!html && item.Header.TopLevelMediaType.Equals(MimeTopLevelMediaType.text) && item.Header.SubType.Equals("html"))
)
{
continue;
}
// First allowed one.
if (altenative == null)
{
altenative = item;
// We don't have to select body part based on subtype if not asked for, or not a text one
// or it's already the preferred one
if (preferredtextsubtype == null || item.Header.TopLevelMediaType != MimeTopLevelMediaType.text || (item.Header.SubType == preferredtextsubtype))
{
break;
}
// This one is preferred over the last part
}
else if (item.Header.TopLevelMediaType == MimeTopLevelMediaType.text && item.Header.SubType == preferredtextsubtype)
{
altenative = item;
break;
}
}
if (altenative != null)
{
// If message body as html is allowed and part has a Content-ID field
// add an anchor to mark this body part
if (html && part.Header.Contains("Content-ID") && (options & DecodeOptions.NamedAnchors) == DecodeOptions.NamedAnchors)
{
// There is a previous text body, so enclose it in <pre>
if (!this._bodyHtml && this._body.Length > 0)
{
this._body = System.String.Concat("<pre>", System.Web.HttpUtility.HtmlEncode(this._body), "</pre>");
this._bodyHtml = true;
}
// Add the anchor
this._body = System.String.Concat(this._body, "<a name=\"", MimeTools.Rfc2392Url(this.MessageID), "_", MimeTools.Rfc2392Url(part.Header.ContentID), "\"></a>");
}
this.ParseMessage(altenative, types, html, options, preferredtextsubtype, path);
}
}
// TODO: Take into account each subtype of "multipart"
}
else if (part.PartsCount > 0)
{
foreach (MimeMessage item in part)
{
this.ParseMessage(item, types, html, options, preferredtextsubtype, path);
}
}
break;
case MimeTopLevelMediaType.text:
if ((part.Disposition == null || !part.Disposition.Equals("attachment"))
&& (part.Header.SubType.Equals("plain") || part.Header.SubType.Equals("html")))
{
bool body_was_html = this._bodyHtml;
// HTML content not allowed
if (part.Header.SubType.Equals("html"))
{
if (!html)
break;
this._bodyHtml = true;
}
if (html && part.Header.Contains("Content-ID") && (options & DecodeOptions.NamedAnchors) == DecodeOptions.NamedAnchors)
{
this._bodyHtml = true;
}
if (this._bodyHtml && !body_was_html && this._body.Length > 0)
{
this._body = System.String.Concat("<pre>", System.Web.HttpUtility.HtmlEncode(this._body), "</pre>");
}
// If message body is html and this part has a Content-ID field
// add an anchor to mark this body part
if (this._bodyHtml && part.Header.Contains("Content-ID") && (options & DecodeOptions.NamedAnchors) == DecodeOptions.NamedAnchors)
{
this._body = System.String.Concat(this._body, "<a name=\"", MimeTools.Rfc2392Url(this.MessageID), "_", MimeTools.Rfc2392Url(part.Header.ContentID), "\"></a>");
}
if (this._bodyHtml && part.Header.SubType.Equals("plain"))
{
this._body = System.String.Concat(this._body, "<pre>", System.Web.HttpUtility.HtmlEncode(part.BodyDecoded), "</pre>");
}
else
this._body = System.String.Concat(this._body, part.BodyDecoded);
}
else
{
if ((types & MimeTopLevelMediaType.application) != MimeTopLevelMediaType.application)
{
return;
}
goto case MimeTopLevelMediaType.application;
}
break;
case MimeTopLevelMediaType.application:
case MimeTopLevelMediaType.audio:
case MimeTopLevelMediaType.image:
case MimeTopLevelMediaType.video:
// Attachments not allowed.
if ((options & DecodeOptions.AllowAttachments) != DecodeOptions.AllowAttachments)
break;
SharpAttachment attachment = null;
// Save to a file
if (path != null)
{
System.IO.FileInfo file = part.DumpBody(path, true);
if (file != null)
{
attachment = new SharpAttachment(file);
attachment.Name = file.Name;
attachment.Size = file.Length;
}
// Save to a stream
}
else
{
System.IO.MemoryStream stream = new System.IO.MemoryStream();
part.DumpBody(stream);
attachment = new SharpAttachment(stream);
attachment.Name = part.Name ?? System.String.Concat("generated_", part.GetHashCode(), ".", part.Header.SubType);
attachment.Size = stream.Length;
}
if (attachment != null && part.Header.SubType == "ms-tnef" && (options & DecodeOptions.DecodeTnef) == DecodeOptions.DecodeTnef)
{
// Try getting attachments form a tnef stream
System.IO.Stream stream = attachment.Stream;
if (stream != null && stream.CanSeek)
stream.Seek(0, System.IO.SeekOrigin.Begin);
TnefMessage tnef = new TnefMessage(stream);
if (tnef.Parse(path))
{
if (tnef.Attachments != null)
{
this._attachments.AddRange(tnef.Attachments);
}
attachment.Close();
// Delete the raw tnef file
if (attachment.SavedFile != null)
{
if (stream != null && stream.CanRead)
stream.Close();
attachment.SavedFile.Delete();
}
attachment = null;
tnef.Close();
}
else
{
// The read-only stream is no longer needed and locks the file
if (attachment.SavedFile != null && stream != null && stream.CanRead)
stream.Close();
}
}
if (attachment != null)
{
if (part.Disposition != null && part.Disposition == "inline")
{
attachment.Inline = true;
}
attachment.MimeTopLevelMediaType = part.Header.TopLevelMediaType;
attachment.MimeMediaSubType = part.Header.SubType;
// Store attachment's CreationTime
if (part.Header.ContentDispositionParameters.ContainsKey("creation-date"))
attachment.CreationTime = MimeTools.parseDate(part.Header.ContentDispositionParameters["creation-date"]);
// Store attachment's LastWriteTime
if (part.Header.ContentDispositionParameters.ContainsKey("modification-date"))
attachment.LastWriteTime = MimeTools.parseDate(part.Header.ContentDispositionParameters["modification-date"]);
if (part.Header.Contains("Content-ID"))
attachment.ContentID = part.Header.ContentID;
this._attachments.Add(attachment);
}
break;
}
}
