/// <summary>
/// Initializes a populated instance of the OpaqueMail.ReadOnlyMailMessage class representing the message text passed in with attachments procesed according to the attachment filter flags.
/// </summary>
/// <param name="messageText">The raw contents of the e-mail message.</param>
/// <param name="processingFlags">Flags determining whether specialized properties are returned with a ReadOnlyMailMessage.</param>
/// <param name="parseExtendedHeaders">Whether to populate the ExtendedHeaders object.</param>
public ReadOnlyMailMessage(string messageText, ReadOnlyMailMessageProcessingFlags processingFlags, bool parseExtendedHeaders)
{
if (((processingFlags & ReadOnlyMailMessageProcessingFlags.IncludeRawHeaders) > 0) &&
(processingFlags & ReadOnlyMailMessageProcessingFlags.IncludeRawBody) > 0)
{
RawMessage = messageText;
}
// Remember which specialized attachments to include.
ProcessingFlags = processingFlags;
// Fix messages whose carriage returns have been stripped.
if (messageText.IndexOf("\r") < 0)
{
messageText = messageText.Replace("\n", "\r\n");
}
// Separate the headers for processing.
string headers;
int cutoff = messageText.IndexOf("\r\n\r\n");
if (cutoff > -1)
{
headers = messageText.Substring(0, cutoff);
}
else
{
headers = messageText;
}
// Set the raw headers property if requested.
if ((processingFlags & ReadOnlyMailMessageProcessingFlags.IncludeRawHeaders) > 0)
{
RawHeaders = headers;
}
// Calculate the size of the message.
Size = messageText.Length;
// Temporary header variables to be processed by Functions.FromMailAddressString() later.
string fromText = "";
string toText = "";
string ccText = "";
string bccText = "";
string replyToText = "";
string subjectText = "";
// Temporary header variables to be processed later.
List <string> receivedChain = new List <string>();
string receivedText = "";
// Unfold any unneeded whitespace, then loop through each line of the headers.
string[] headersList = Functions.UnfoldWhitespace(headers).Replace("\r", "").Split('\n');
foreach (string header in headersList)
{
// Split header {name:value} pairs by the first colon found.
int colonPos = header.IndexOf(":");
if (colonPos > -1 && colonPos < header.Length - 1)
{
string[] headerParts = new string[] { header.Substring(0, colonPos), header.Substring(colonPos + 1).TrimStart(new char[] { ' ' }) };
string headerType = headerParts[0].ToLower();
string headerValue = headerParts[1];
// Set header variables for common headers.
if (!string.IsNullOrEmpty(headerType) && !string.IsNullOrEmpty(headerValue))
{
Headers[headerParts[0]] = headerValue;
}
switch (headerType)
{
case "cc":
if (ccText.Length > 0)
{
ccText += ", ";
}
ccText = headerValue;
break;
case "content-transfer-encoding":
ContentTransferEncoding = headerValue;
switch (headerValue.ToLower())
{
case "base64":
BodyTransferEncoding = TransferEncoding.Base64;
break;
case "quoted-printable":
BodyTransferEncoding = TransferEncoding.QuotedPrintable;
break;
case "7bit":
BodyTransferEncoding = TransferEncoding.SevenBit;
break;
case "8bit":
BodyTransferEncoding = TransferEncoding.EightBit;
break;
default:
BodyTransferEncoding = TransferEncoding.Unknown;
break;
}
break;
case "content-language":
ContentLanguage = headerValue;
break;
case "content-type":
// If multiple content-types are passed, only process the first.
if (string.IsNullOrEmpty(ContentType))
{
ContentType = headerValue.Trim();
CharSet = Functions.ExtractMimeParameter(ContentType, "charset");
}
break;
case "date":
string dateString = headerValue;
// Ignore extraneous datetime information.
int dateStringParenthesis = dateString.IndexOf("(");
if (dateStringParenthesis > -1)
{
dateString = dateString.Substring(0, dateStringParenthesis - 1);
}
// Remove timezone suffix.
if (dateString.Substring(dateString.Length - 4, 1) == " ")
{
dateString = dateString.Substring(0, dateString.Length - 4);
}
DateTime.TryParse(dateString, out Date);
break;
case "delivered-to":
DeliveredTo = headerValue;
break;
case "from":
fromText = headerValue;
break;
case "importance":
Importance = headerValue;
break;
case "in-reply-to":
// Ignore opening and closing <> characters.
InReplyTo = headerValue;
if (InReplyTo.StartsWith("<"))
{
InReplyTo = InReplyTo.Substring(1);
}
if (InReplyTo.EndsWith(">"))
{
InReplyTo = InReplyTo.Substring(0, InReplyTo.Length - 1);
}
break;
case "message-id":
// Ignore opening and closing <> characters.
MessageId = headerValue;
if (MessageId.StartsWith("<"))
{
MessageId = MessageId.Substring(1);
}
if (MessageId.EndsWith(">"))
{
MessageId = MessageId.Substring(0, MessageId.Length - 1);
}
break;
case "received":
case "x-received":
if (!string.IsNullOrEmpty(receivedText))
{
receivedChain.Add(receivedText);
}
receivedText = headerValue;
break;
case "replyto":
case "reply-to":
replyToText = headerValue;
break;
case "return-path":
// Ignore opening and closing <> characters.
ReturnPath = headerValue;
if (ReturnPath.StartsWith("<"))
{
ReturnPath = ReturnPath.Substring(1);
}
if (ReturnPath.EndsWith(">"))
{
ReturnPath = ReturnPath.Substring(0, ReturnPath.Length - 1);
}
break;
case "sender":
case "x-sender":
if (headerValue.Length > 0)
{
MailAddressCollection senderCollection = Functions.FromMailAddressString(headerValue);
if (senderCollection.Count > 0)
{
this.Sender = senderCollection[0];
}
}
break;
case "subject":
subjectText = headerValue;
break;
case "to":
if (toText.Length > 0)
{
toText += ", ";
}
toText += headerValue;
break;
case "x-priority":
switch (headerValue.ToUpper())
{
case "LOW":
Priority = MailPriority.Low;
break;
case "NORMAL":
Priority = MailPriority.Normal;
break;
case "HIGH":
Priority = MailPriority.High;
break;
}
break;
case "x-subject-encryption":
bool.TryParse(headerValue, out SubjectEncryption);
break;
default:
break;
}
// Set header variables for advanced headers.
if (parseExtendedHeaders)
{
ExtendedProperties = new ExtendedProperties();
switch (headerType)
{
case "acceptlanguage":
case "accept-language":
ExtendedProperties.AcceptLanguage = headerValue;
break;
case "authentication-results":
ExtendedProperties.AuthenticationResults = headerValue;
break;
case "bounces-to":
case "bounces_to":
ExtendedProperties.BouncesTo = headerValue;
break;
case "content-description":
ExtendedProperties.ContentDescription = headerValue;
break;
case "dispositionnotificationto":
case "disposition-notification-to":
ExtendedProperties.DispositionNotificationTo = headerValue;
break;
case "dkim-signature":
case "domainkey-signature":
case "x-google-dkim-signature":
ExtendedProperties.DomainKeySignature = headerValue;
break;
case "domainkey-status":
ExtendedProperties.DomainKeyStatus = headerValue;
break;
case "errors-to":
ExtendedProperties.ErrorsTo = headerValue;
break;
case "list-unsubscribe":
case "x-list-unsubscribe":
ExtendedProperties.ListUnsubscribe = headerValue;
break;
case "mailer":
case "x-mailer":
ExtendedProperties.Mailer = headerValue;
break;
case "organization":
case "x-originator-org":
case "x-originatororg":
case "x-organization":
ExtendedProperties.OriginatorOrg = headerValue;
break;
case "original-messageid":
case "x-original-messageid":
ExtendedProperties.OriginalMessageId = headerValue;
break;
case "originating-email":
case "x-originating-email":
ExtendedProperties.OriginatingEmail = headerValue;
break;
case "precedence":
ExtendedProperties.Precedence = headerValue;
break;
case "received-spf":
ExtendedProperties.ReceivedSPF = headerValue;
break;
case "references":
ExtendedProperties.References = headerValue;
break;
case "resent-date":
string dateString = headerValue;
// Ignore extraneous datetime information.
int dateStringParenthesis = dateString.IndexOf("(");
if (dateStringParenthesis > -1)
{
dateString = dateString.Substring(0, dateStringParenthesis - 1);
}
// Remove timezone suffix.
if (dateString.Substring(dateString.Length - 4) == " ")
{
dateString = dateString.Substring(0, dateString.Length - 4);
}
DateTime.TryParse(dateString, out ExtendedProperties.ResentDate);
break;
case "resent-from":
ExtendedProperties.ResentFrom = headerValue;
break;
case "resent-message-id":
ExtendedProperties.ResentMessageID = headerValue;
break;
case "thread-index":
ExtendedProperties.ThreadIndex = headerValue;
break;
case "thread-topic":
ExtendedProperties.ThreadTopic = headerValue;
break;
case "user-agent":
case "useragent":
ExtendedProperties.UserAgent = headerValue;
break;
case "x-auto-response-suppress":
ExtendedProperties.AutoResponseSuppress = headerValue;
break;
case "x-campaign":
case "x-campaign-id":
case "x-campaignid":
case "x-mllistcampaign":
case "x-rpcampaign":
ExtendedProperties.CampaignID = headerValue;
break;
case "x-delivery-context":
ExtendedProperties.DeliveryContext = headerValue;
break;
case "x-maillist-id":
ExtendedProperties.MailListId = headerValue;
break;
case "x-msmail-priority":
ExtendedProperties.MSMailPriority = headerValue;
break;
case "x-originalarrivaltime":
case "x-original-arrival-time":
dateString = headerValue;
// Ignore extraneous datetime information.
dateStringParenthesis = dateString.IndexOf("(");
if (dateStringParenthesis > -1)
{
dateString = dateString.Substring(0, dateStringParenthesis - 1);
}
// Remove timezone suffix.
if (dateString.Substring(dateString.Length - 4) == " ")
{
dateString = dateString.Substring(0, dateString.Length - 4);
}
DateTime.TryParse(dateString, out ExtendedProperties.OriginalArrivalTime);
break;
case "x-originating-ip":
ExtendedProperties.OriginatingIP = headerValue;
break;
case "x-rcpt-to":
if (headerValue.Length > 1)
{
ExtendedProperties.RcptTo = headerValue.Substring(1, headerValue.Length - 2);
}
break;
case "x-csa-complaints":
case "x-complaints-to":
case "x-reportabuse":
case "x-report-abuse":
case "x-mail_abuse_inquiries":
ExtendedProperties.ReportAbuse = headerValue;
break;
case "x-spam-score":
ExtendedProperties.SpamScore = headerValue;
break;
default:
break;
}
}
}
}
// Track all Received and X-Received headers.
if (!string.IsNullOrEmpty(receivedText))
{
receivedChain.Add(receivedText);
}
ReceivedChain = receivedChain.ToArray();
// Process the body if it's passed in.
string body = "";
if (cutoff > -1)
{
body = messageText.Substring(cutoff + 2);
}
if (!string.IsNullOrEmpty(body))
{
// Set the raw body property if requested.
if ((processingFlags & ReadOnlyMailMessageProcessingFlags.IncludeRawBody) > 0)
{
RawBody = body;
}
// Parse body into MIME parts.
List <MimePart> mimeParts = MimePart.ExtractMIMEParts(ContentType, CharSet, ContentTransferEncoding, body, ProcessingFlags);
// Process each MIME part.
if (mimeParts.Count > 0)
{
// Keep track of S/MIME signing and envelope encryption.
bool allMimePartsSigned = true, allMimePartsEncrypted = true, allMimePartsTripleWrapped = true;
// Process each MIME part.
for (int j = 0; j < mimeParts.Count; j++)
{
MimePart mimePart = mimeParts[j];
int semicolon = mimePart.ContentType.IndexOf(";");
if (semicolon > -1)
{
string originalContentType = mimePart.ContentType;
mimePart.ContentType = mimePart.ContentType.Substring(0, semicolon);
if (mimePart.ContentType.ToUpper() == "MESSAGE/PARTIAL")
{
PartialMessageId = Functions.ExtractMimeParameter(originalContentType, "id");
int partialMessageNumber = 0;
if (int.TryParse(Functions.ExtractMimeParameter(originalContentType, "number"), out partialMessageNumber))
{
PartialMessageNumber = partialMessageNumber;
}
}
}
// Extract any signing certificates. If this MIME part isn't signed, the overall message isn't signed.
if (mimePart.SmimeSigned)
{
if (mimePart.SmimeSigningCertificates.Count > 0 && SmimeSigningCertificate == null)
{
foreach (X509Certificate2 signingCert in mimePart.SmimeSigningCertificates)
{
if (!SmimeSigningCertificateChain.Contains(signingCert))
{
SmimeSigningCertificateChain.Add(signingCert);
SmimeSigningCertificate = signingCert;
}
}
}
}
else
{
allMimePartsSigned = false;
}
// If this MIME part isn't marked as being in an encrypted envelope, the overall message isn't encrypted.
if (!mimePart.SmimeEncryptedEnvelope)
{
// Ignore signatures and encryption blocks when determining if everything is encrypted.
if (!mimePart.ContentType.StartsWith("application/pkcs7-signature") && !mimePart.ContentType.StartsWith("application/x-pkcs7-signature") && !mimePart.ContentType.StartsWith("application/pkcs7-mime"))
{
allMimePartsEncrypted = false;
}
}
// If this MIME part isn't marked as being triple wrapped, the overall message isn't triple wrapped.
if (!mimePart.SmimeTripleWrapped)
{
// Ignore signatures and encryption blocks when determining if everything is triple wrapped.
if (!mimePart.ContentType.StartsWith("application/pkcs7-signature") && !mimePart.ContentType.StartsWith("application/x-pkcs7-signature") && !mimePart.ContentType.StartsWith("application/pkcs7-mime"))
{
allMimePartsTripleWrapped = false;
}
}
// Set the default primary body, defaulting to text/html and falling back to any text/*.
string contentTypeToUpper = mimePart.ContentType.ToUpper();
if (Body.Length < 1)
{
// If the MIME part is of type text/*, set it as the intial message body.
if (string.IsNullOrEmpty(mimePart.ContentType) || contentTypeToUpper.StartsWith("TEXT/"))
{
IsBodyHtml = contentTypeToUpper.StartsWith("TEXT/HTML");
Body = mimePart.Body;
CharSet = mimePart.CharSet;
ContentType = mimePart.ContentType;
if (mimePart.ContentTransferEncoding != TransferEncoding.Unknown)
{
BodyTransferEncoding = mimePart.ContentTransferEncoding;
}
}
else
{
// If the MIME part isn't of type text/*, treat is as an attachment.
MemoryStream attachmentStream = new MemoryStream(mimePart.BodyBytes);
Attachment attachment;
if (mimePart.ContentType.IndexOf("/") > -1)
{
attachment = new Attachment(attachmentStream, mimePart.Name, mimePart.ContentType);
}
else
{
attachment = new Attachment(attachmentStream, mimePart.Name);
}
attachment.ContentId = mimePart.ContentID;
Attachments.Add(attachment);
}
}
else
{
// If the current body isn't text/html and this is, replace the default body with the current MIME part.
if (!ContentType.ToUpper().StartsWith("TEXT/HTML") && contentTypeToUpper.StartsWith("TEXT/HTML"))
{
// Add the previous default body as an alternate view.
MemoryStream alternateViewStream = new MemoryStream(Encoding.UTF8.GetBytes(Body));
AlternateView alternateView = new AlternateView(alternateViewStream, ContentType);
if (BodyTransferEncoding != TransferEncoding.Unknown)
{
alternateView.TransferEncoding = BodyTransferEncoding;
}
AlternateViews.Add(alternateView);
IsBodyHtml = true;
Body = mimePart.Body;
CharSet = mimePart.CharSet;
ContentType = mimePart.ContentType;
if (mimePart.ContentTransferEncoding != TransferEncoding.Unknown)
{
BodyTransferEncoding = mimePart.ContentTransferEncoding;
}
}
else
{
// If the MIME part isn't of type text/*, treat is as an attachment.
MemoryStream attachmentStream = new MemoryStream(mimePart.BodyBytes);
Attachment attachment;
if (mimePart.ContentType.IndexOf("/") > -1)
{
attachment = new Attachment(attachmentStream, mimePart.Name, mimePart.ContentType);
}
else
{
attachment = new Attachment(attachmentStream, mimePart.Name);
}
attachment.ContentId = mimePart.ContentID;
Attachments.Add(attachment);
}
}
}
// OpaqueMail optional setting for protecting the subject.
if (SubjectEncryption && Body.StartsWith("Subject: "))
{
int linebreakPosition = Body.IndexOf("\r\n");
if (linebreakPosition > -1)
{
subjectText = Body.Substring(9, linebreakPosition - 9);
Body = Body.Substring(linebreakPosition + 2);
}
}
// Set the message's S/MIME attributes.
SmimeSigned = allMimePartsSigned;
SmimeEncryptedEnvelope = allMimePartsEncrypted;
SmimeTripleWrapped = allMimePartsTripleWrapped;
}
else
{
// Process non-MIME messages.
Body = body;
}
}
// Parse String representations of addresses into MailAddress objects.
if (fromText.Length > 0)
{
MailAddressCollection fromAddresses = Functions.FromMailAddressString(fromText);
if (fromAddresses.Count > 0)
{
From = fromAddresses[0];
}
}
if (toText.Length > 0)
{
To.Clear();
MailAddressCollection toAddresses = Functions.FromMailAddressString(toText);
foreach (MailAddress toAddress in toAddresses)
{
To.Add(toAddress);
}
// Add the address to the AllRecipients collection.
foreach (MailAddress toAddress in toAddresses)
{
if (!AllRecipients.Contains(toAddress.Address))
{
AllRecipients.Add(toAddress.Address);
}
}
}
if (ccText.Length > 0)
{
CC.Clear();
MailAddressCollection ccAddresses = Functions.FromMailAddressString(ccText);
foreach (MailAddress ccAddress in ccAddresses)
{
CC.Add(ccAddress);
}
// Add the address to the AllRecipients collection.
foreach (MailAddress ccAddress in ccAddresses)
{
if (!AllRecipients.Contains(ccAddress.Address))
{
AllRecipients.Add(ccAddress.Address);
}
}
}
if (bccText.Length > 0)
{
Bcc.Clear();
MailAddressCollection bccAddresses = Functions.FromMailAddressString(bccText);
foreach (MailAddress bccAddress in bccAddresses)
{
Bcc.Add(bccAddress);
}
// Add the address to the AllRecipients collection.
foreach (MailAddress bccAddress in bccAddresses)
{
if (!AllRecipients.Contains(bccAddress.Address))
{
AllRecipients.Add(bccAddress.Address);
}
}
}
if (replyToText.Length > 0)
{
ReplyToList.Clear();
MailAddressCollection replyToAddresses = Functions.FromMailAddressString(replyToText);
foreach (MailAddress replyToAddress in replyToAddresses)
{
ReplyToList.Add(replyToAddress);
}
}
// Decode international strings and remove escaped linebreaks.
Subject = Functions.DecodeMailHeader(subjectText).Replace("\r", "").Replace("\n", "");
}