// Extracts binary contents from mime and saves them to given location.
// Inserts <content-ID, saved file name> pairs to the dictionary.
private static void SaveAttachments(Entity mimeEntity, string savePath, Dictionary <string, string> savedFiles)
{
if (mimeEntity.IsMultipart)
{
foreach (Entity part in ((Multipart)mimeEntity.Body).BodyParts)
{
ContentTypeField contentType = part.Header.GetField(MimeField.ContentType) as ContentTypeField;
if (contentType == null)
{
continue;
}
if (part.Body is MimeMessage)
{
SaveAttachments((MimeMessage)part.Body, savePath, savedFiles);
}
else if (part.IsMultipart)
{
SaveAttachments((Entity)part, savePath, savedFiles);
}
else if (!(part.Body is ITextBody))
{
string fileName;
if (contentType.Parameters.Contains("name"))
{
string name = contentType.Parameters["name"].ToString();
if (IsValidFileName(name))
{
fileName = name;
}
else
{
fileName = Path.GetFileNameWithoutExtension(Path.GetTempFileName()) + ".attachment";
}
}
else
{
fileName = Path.GetFileNameWithoutExtension(Path.GetTempFileName()) + ".attachment";
}
string filePath = Path.Combine(savePath, fileName);
FileStream outFileStream = new FileStream(filePath, FileMode.Create);
BinaryReader rdr = ((IBinaryBody)part.Body).Reader;
byte[] buf = new byte[1024];
int bytesRead = 0;
while ((bytesRead = rdr.Read(buf, 0, buf.Length)) > 0)
{
outFileStream.Write(buf, 0, bytesRead);
}
outFileStream.Flush();
outFileStream.Close();
MimeField contentIdField = part.Header.GetField("Content-ID");
string key = (contentIdField != null) ? contentIdField.Body.Trim('"', '<', '>', ' ') : fileName;
if (!savedFiles.ContainsKey(key))
{
savedFiles.Add(key, filePath);
}
}
}
}
}
// Extracts binary contents from mime and saves them to given location.
// Inserts <content-ID, saved file path> pairs to the dictionary.
private static void SaveAttachments(Entity mimeEntity, string savePath, Dictionary <string, string> savedFiles)
{
if (mimeEntity.IsMultipart)
{
foreach (Entity part in ((Multipart)mimeEntity.Body).BodyParts)
{
ContentTypeField contentType = part.Header.GetField(MimeField.ContentType) as ContentTypeField;
if (contentType == null)
{
continue;
}
if (part.Body is MimeMessage)
{
SaveAttachments((MimeMessage)part.Body, savePath, savedFiles);
}
else if (part.IsMultipart)
{
SaveAttachments((Entity)part, savePath, savedFiles);
}
else
{
MimeField contentDispositionField = part.Header.GetField("Content-Disposition");
if (contentDispositionField == null)
{
continue;
}
if (!contentDispositionField.Body.StartsWith("attachment"))
{
continue;
}
string fileName;
Match fileNameMatch = Regex.Match(contentDispositionField.Body, "filename=\"?([^<>\"]+)");
if (fileNameMatch.Success)
{
string name = fileNameMatch.Groups[1].Value.Trim(' ', '"', '<', '>');
name = Decoder.DecodeSingleLine(name);
if (IsValidFileName(name))
{
fileName = name;
}
else
{
fileName = Path.GetFileNameWithoutExtension(Path.GetTempFileName()) + ".attachment";
}
}
else if (contentType.Parameters.Contains("name"))
{
string name = contentType.Parameters["name"].ToString();
if (IsValidFileName(name))
{
fileName = name;
}
else
{
fileName = Path.GetFileNameWithoutExtension(Path.GetTempFileName()) + ".attachment";
}
}
else
{
fileName = Path.GetFileNameWithoutExtension(Path.GetTempFileName()) + ".attachment";
}
string filePath = Path.Combine(savePath, fileName);
if (part.Body is ITextBody)
{
try
{
string parsedText = ParseTextBody(part);
File.WriteAllText(filePath, parsedText);
savedFiles.Add(fileName, filePath);
}
catch (Exception e)
{
Trace.WriteLine("SaveAttachments: " + e.Message);
}
}
else
{
try
{
FileStream outFileStream = new FileStream(filePath, FileMode.Create);
BinaryReader rdr = ((IBinaryBody)part.Body).Reader;
byte[] buf = new byte[1024];
int bytesRead = 0;
while ((bytesRead = rdr.Read(buf, 0, buf.Length)) > 0)
{
outFileStream.Write(buf, 0, bytesRead);
}
outFileStream.Flush();
outFileStream.Close();
savedFiles.Add(fileName, filePath);
}
catch (Exception e)
{
Trace.WriteLine("SaveAttachments: " + e.Message);
}
}
}
}
}
}
