public Attachment(string buffer) : base(buffer)
{
this.contentDisposition = this.GetValueFromHeader("Content-Disposition: ");
this.fileName = GetValueEqualFromHeader("name=");
this.contentID = GetValueFromHeader("Content-ID: ");
if (contentDisposition.IndexOf("attachment") != -1)
{
this.fileName = GetValueEqualFromHeader("filename=");
this.isRealAttachment = true;
}
if (contentType.IndexOf("multipart") != -1)
{
string boundary = "--" + GetValueEqualFromHeader("boundary=");
hasAttachments = true;
ParseMixedMessage(buffer, boundary);
}
else
{
hasAttachments = false;
//data
int start = buffer.IndexOf("\r\n\r\n");
if (start == -1)
{
throw new Exception("could not find beginning of MIME body");
}
start += 4;
if (this.contentTransferEncoding.ToLower().IndexOf("base64") != -1)
{
this.data = Convert.FromBase64String(buffer.Substring(start));
}
else
if (this.contentTransferEncoding.IndexOf("quoted-printable") != -1)
{
this.data = QuotedCoding.GetByteArray(buffer.Substring(start));
}
else
{
//change charset if contentTransferEncoding is 8bit
if (this.contentTransferEncoding.IndexOf("8bit") != -1)
{
this.data = StringOperations.GetByteArray(StringOperations.Change(buffer.Substring(start), charset));
}
else
{
this.data = StringOperations.GetByteArray(buffer.Substring(start));
}
}
}
}
internal string GetTextMessage(string buffer)
{
// find "\r\n\r\n" denoting end of header
int start = buffer.IndexOf("\r\n\r\n") + 4;
int end = buffer.LastIndexOf("\r\n.\r\n");
//change charset if contentTransferEncoding is 8bit
if (this.contentTransferEncoding.IndexOf("8bit") != -1)
{
return(StringOperations.Change(buffer.Substring(start, end - start), charset));
}
else if (this.contentTransferEncoding.IndexOf("base64") != -1)
{
return(StringOperations.Decode(buffer.Substring(start, end - start), charset));
}
else
{
return(buffer.Substring(start, end - start));
}
}
