public Attachment(string fileName, ContentType contentType) : base(fileName, contentType)
{
if ((contentType.Name == null) || (contentType.Name == string.Empty))
{
this.Name = AttachmentBase.ShortNameFromFile(fileName);
}
else
{
this.Name = contentType.Name;
}
base.MimePart.ContentDisposition = new System.Net.Mime.ContentDisposition();
}
internal static void AddAttachment(StringBuilder builder, AttachmentBase view)
{
string contentType = "Content-Type: " + view.ContentType.MediaType;
foreach (string key in view.ContentType.Parameters.Keys)
{
contentType = contentType + "; " + key + "=" +
view.ContentType.Parameters[key];
}
builder.AppendLine(contentType);
builder.AppendLine("Content-Transfer-Encoding: base64");
if (!string.IsNullOrEmpty(view.ContentId))
{
builder.AppendLine("Content-Id: <" + view.ContentId + ">");
}
if (view is Attachment)
{
builder.AppendLine("Content-Disposition: attachment");
}
builder.AppendLine();
using (MemoryStream memstream = new MemoryStream())
{
int bytesRead;
byte[] buffer = new byte[4096];
while ((bytesRead = view.ContentStream.Read(buffer, 0, buffer.Length)) > 0)
{
memstream.Write(buffer, 0, bytesRead);
}
string str = Convert.ToBase64String(memstream.ToArray());
StringReader reader = new StringReader(str);
char[] line = new char[76];
int read;
while ((read = reader.Read(line, 0, line.Length)) > 0)
{
builder.AppendLine(new string(line, 0, read));
}
}
if (view.ContentStream.CanSeek)
{
view.ContentStream.Seek(0, SeekOrigin.Begin);
}
}
private void StartSection (string section, ContentType sectionContentType, AttachmentBase att)
{
SendData (String.Format ("--{0}", section));
SendHeader ("content-type", sectionContentType.ToString ());
SendHeader ("content-transfer-encoding", GetTransferEncodingName (att.TransferEncoding));
if (!string.IsNullOrEmpty (att.ContentId))
SendHeader("content-ID", "<" + att.ContentId + ">");
SendData (string.Empty);
}
static MimePart GetMimePart (AttachmentBase item)
{
var mimeType = item.ContentType.ToString ();
var part = new MimePart (ContentType.Parse (mimeType));
var attachment = item as Attachment;
if (attachment != null) {
var disposition = attachment.ContentDisposition.ToString ();
part.ContentDisposition = ContentDisposition.Parse (disposition);
}
switch (item.TransferEncoding) {
case System.Net.Mime.TransferEncoding.QuotedPrintable:
part.ContentTransferEncoding = ContentEncoding.QuotedPrintable;
break;
case System.Net.Mime.TransferEncoding.Base64:
part.ContentTransferEncoding = ContentEncoding.Base64;
break;
case System.Net.Mime.TransferEncoding.SevenBit:
part.ContentTransferEncoding = ContentEncoding.SevenBit;
break;
}
if (item.ContentId != null)
part.ContentId = item.ContentId;
var stream = new MemoryBlockStream ();
item.ContentStream.CopyTo (stream);
stream.Position = 0;
part.ContentObject = new ContentObject (stream);
return part;
}
protected static Encoding resolveViewEncoding(AttachmentBase view, Encoding fallbackEncoding)
{
String charSet = view.ContentType.CharSet;
try
{
return Encoding.GetEncoding(charSet);
}
catch
{
return fallbackEncoding;
}
}
protected static string GetStringFromView(AttachmentBase view)
{
Encoding encoding = resolveViewEncoding(view, Encoding.ASCII);
var data = new byte[view.ContentStream.Length];
view.ContentStream.Read(data, 0, data.Length);
return encoding.GetString(data);
}
private static string GetStringFromView(AttachmentBase view)
{
var data = new byte[view.ContentStream.Length];
view.ContentStream.Read(data, 0, data.Length);
return Encoding.ASCII.GetString(data);
}
private static byte[] getAttachmentBytes(AttachmentBase attachment)
{
MemoryStream actual = new MemoryStream();
Stream stream = attachment.ContentStream;
while (true)
{
int outByte = stream.ReadByte();
if (outByte != -1)
actual.Write(new[] { (byte)outByte }, 0, 1);
else
break;
}
return actual.ToArray();
}
/// <summary>
/// Creates a MIME body part from an entry of the AlternateView or
/// Attachments collection of a MailMessage instance and appends it
/// to the specified Stringbuilder instance.
/// </summary>
/// <param name="builder">The Stringbuilder instance to append the
/// body part to.</param>
/// <param name="view">An entry from either the AlternateView or the
/// Attachments collection of a MailMessage instance.</param>
static void AddAttachment(StringBuilder builder, AttachmentBase view) {
// Append the MIME headers for this body part
string contentType = "Content-Type: " + view.ContentType.MediaType;
foreach (string key in view.ContentType.Parameters.Keys) {
contentType = contentType + "; " + key + "=" +
view.ContentType.Parameters[key];
}
builder.AppendLine(contentType);
builder.AppendLine("Content-Transfer-Encoding: base64");
if (!String.IsNullOrEmpty(view.ContentId))
builder.AppendLine("Content-Id: <" + view.ContentId + ">");
if (view is Attachment)
builder.AppendLine("Content-Disposition: attachment");
builder.AppendLine();
// Append the actual body part contents encoded as Base64
using (MemoryStream memstream = new MemoryStream()) {
int bytesRead;
byte[] buffer = new byte[4096];
while ((bytesRead =
view.ContentStream.Read(buffer, 0, buffer.Length)) > 0) {
memstream.Write(buffer, 0, bytesRead);
}
string str = Convert.ToBase64String(memstream.ToArray());
foreach (string chunk in str.ToChunks(76))
builder.AppendLine(chunk);
}
// Rewind the stream if it supports seeking
if (view.ContentStream.CanSeek)
view.ContentStream.Seek(0, SeekOrigin.Begin);
}
/// <summary>
/// Creates a MIME body part from an entry of the AlternateView or
/// Attachments collection of a MailMessage instance and appends it
/// to the specified Stringbuilder instance.
/// </summary>
/// <param name="builder">
/// The Stringbuilder instance to append the
/// body part to.
/// </param>
/// <param name="view">
/// An entry from either the AlternateView or the
/// Attachments collection of a MailMessage instance.
/// </param>
private static void AddAttachment(StringBuilder builder, AttachmentBase view)
{
// Append the MIME headers for this body part
var contentType = "Content-Type: " + view.ContentType.MediaType;
foreach (string key in view.ContentType.Parameters.Keys)
{
contentType = contentType + "; " + key + "=" +
view.ContentType.Parameters[key];
}
builder.AppendLine(contentType);
builder.AppendLine("Content-Transfer-Encoding: base64");
if (!string.IsNullOrEmpty(view.ContentId))
builder.AppendLine("Content-Id: <" + view.ContentId + ">");
if (view is Attachment)
builder.AppendLine($"Content-Disposition: attachment; filename=\"{((Attachment) view).Name}\"");
builder.AppendLine();
// Append the actual body part contents encoded as Base64
using (var memstream = new MemoryStream())
{
int bytesRead;
var buffer = new byte[4096];
while ((bytesRead =
view.ContentStream.Read(buffer, 0, buffer.Length)) > 0)
{
memstream.Write(buffer, 0, bytesRead);
}
var str = Convert.ToBase64String(memstream.ToArray());
var reader = new StringReader(str);
var line = new char[76];
int read;
while ((read = reader.Read(line, 0, line.Length)) > 0)
builder.AppendLine(new string(line, 0, read));
}
// Rewind the stream if it supports seeking
if (view.ContentStream.CanSeek)
view.ContentStream.Seek(0, SeekOrigin.Begin);
}
static MimePart GetMimePart (AttachmentBase item)
{
var mimeType = item.ContentType.ToString ();
var contentType = ContentType.Parse (mimeType);
var attachment = item as Attachment;
MimePart part;
if (contentType.MediaType.Equals ("text", StringComparison.OrdinalIgnoreCase))
part = new TextPart (contentType);
else
part = new MimePart (contentType);
if (attachment != null) {
var disposition = attachment.ContentDisposition.ToString ();
part.ContentDisposition = ContentDisposition.Parse (disposition);
}
switch (item.TransferEncoding) {
case System.Net.Mime.TransferEncoding.QuotedPrintable:
part.ContentTransferEncoding = ContentEncoding.QuotedPrintable;
break;
case System.Net.Mime.TransferEncoding.Base64:
part.ContentTransferEncoding = ContentEncoding.Base64;
break;
case System.Net.Mime.TransferEncoding.SevenBit:
part.ContentTransferEncoding = ContentEncoding.SevenBit;
break;
//case System.Net.Mime.TransferEncoding.EightBit:
// part.ContentTransferEncoding = ContentEncoding.EightBit;
// break;
}
if (item.ContentId != null)
part.ContentId = item.ContentId;
var stream = new MemoryBlockStream ();
item.ContentStream.CopyTo (stream);
stream.Position = 0;
part.ContentObject = new ContentObject (stream);
return part;
}
public Attachment(string fileName, string mediaType) : base(fileName, mediaType)
{
this.Name = AttachmentBase.ShortNameFromFile(fileName);
base.MimePart.ContentDisposition = new System.Net.Mime.ContentDisposition();
}
private static void DumpAttachment( string dir, AttachmentBase attachment )
{
string name = null;
if( !string.IsNullOrEmpty( attachment.ContentType.Name ) )
name = attachment.ContentType.Name;
else
{
name = attachment is AlternateView ? "alternate-view" : "attachment";
string ext = MimeUtility.GetFileExtensionFromMediaType( attachment.ContentType.MediaType );
if( ext == "eml" )
name = "attached-message";
name = string.Format( name + "." + ext );
}
int i = 1;
string shortname = null;
while( File.Exists( dir + Path.DirectorySeparatorChar + name ) )
{
FileInfo fi = new FileInfo( name );
if( null == shortname )
shortname = fi.Name.Substring( 0, fi.Name.Length - fi.Extension.Length );
name = string.Format( "{0} ({1}){2}", shortname, i, fi.Extension );
i++;
}
using( Stream stream = File.Create( dir + Path.DirectorySeparatorChar + name ) )
{
byte[] buffer = new byte[32768];
while( true )
{
int read = attachment.ContentStream.Read( buffer, 0, buffer.Length );
if( read <= 0 )
break;
stream.Write( buffer, 0, read );
}
}
}
