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MailMessage.cs
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MailMessage.cs
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using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.IO;
using System.Linq;
using System.Net.Mail;
using System.Text;
namespace AE.Net.Mail {
public enum MailPriority {
Normal = 3,
High = 5,
Low = 1
}
[System.Flags]
public enum Flags {
None = 0,
Seen = 1,
Answered = 2,
Flagged = 4,
Deleted = 8,
Draft = 16
}
public class MailMessage : ObjectWHeaders {
public static implicit operator System.Net.Mail.MailMessage(MailMessage msg) {
var ret = new System.Net.Mail.MailMessage();
ret.Subject = msg.Subject;
ret.Sender = msg.Sender;
foreach (var a in msg.Bcc)
ret.Bcc.Add(a);
ret.Body = msg.Body;
ret.IsBodyHtml = msg.ContentType.Contains("html");
ret.From = msg.From;
ret.Priority = (System.Net.Mail.MailPriority)msg.Importance;
foreach (var a in msg.ReplyTo)
ret.ReplyToList.Add(a);
foreach (var a in msg.To)
ret.To.Add(a);
foreach (var a in msg.Attachments)
ret.Attachments.Add(new System.Net.Mail.Attachment(new System.IO.MemoryStream(a.GetData()), a.Filename, a.ContentType));
foreach (var a in msg.AlternateViews)
ret.AlternateViews.Add(new System.Net.Mail.AlternateView(new System.IO.MemoryStream(a.GetData()), a.ContentType));
return ret;
}
private bool _HeadersOnly; // set to true if only headers have been fetched.
public MailMessage() {
RawFlags = new string[0];
To = new Collection<MailAddress>();
Cc = new Collection<MailAddress>();
Bcc = new Collection<MailAddress>();
ReplyTo = new Collection<MailAddress>();
Attachments = new Collection<Attachment>();
AlternateViews = new AlternateViewCollection();
}
public virtual DateTime Date { get; set; }
public virtual string[] RawFlags { get; set; }
public virtual Flags Flags { get; set; }
public virtual int Size { get; internal set; }
public virtual string Subject { get; set; }
public virtual ICollection<MailAddress> To { get; private set; }
public virtual ICollection<MailAddress> Cc { get; private set; }
public virtual ICollection<MailAddress> Bcc { get; private set; }
public virtual ICollection<MailAddress> ReplyTo { get; private set; }
public virtual ICollection<Attachment> Attachments { get; set; }
public virtual AlternateViewCollection AlternateViews { get; set; }
public virtual MailAddress From { get; set; }
public virtual MailAddress Sender { get; set; }
public virtual string MessageID { get; set; }
public virtual string Uid { get; internal set; }
public virtual MailPriority Importance { get; set; }
public virtual void Load(string message, bool headersOnly = false) {
if (string.IsNullOrEmpty(message)) return;
using (var mem = new MemoryStream(_DefaultEncoding.GetBytes(message))) {
Load(mem, headersOnly, message.Length);
}
}
public virtual void Load(Stream reader, bool headersOnly = false, int maxLength = 0, char? termChar = null) {
_HeadersOnly = headersOnly;
Headers = null;
Body = null;
var headers = new StringBuilder();
string line;
while ((line = reader.ReadLine(ref maxLength, _DefaultEncoding, termChar)) != null) {
if (line.Trim().Length == 0)
if (headers.Length == 0)
continue;
else
break;
headers.AppendLine(line);
}
RawHeaders = headers.ToString();
if (!headersOnly) {
string boundary = Headers.GetBoundary();
if (!string.IsNullOrEmpty(boundary)) {
var atts = new List<Attachment>();
var body = ParseMime(reader, boundary, ref maxLength, atts, Encoding, termChar);
if (!string.IsNullOrEmpty(body))
SetBody(body);
foreach (var att in atts)
(att.IsAttachment ? Attachments : AlternateViews).Add(att);
if (maxLength > 0)
reader.ReadToEnd(maxLength, Encoding);
} else {
SetBody(reader.ReadToEnd(maxLength, Encoding));
}
}
if ((string.IsNullOrWhiteSpace(Body) || ContentType.StartsWith("multipart/")) && AlternateViews.Count > 0) {
var att = AlternateViews.GetTextView() ?? AlternateViews.GetHtmlView();
if (att != null) {
Body = att.Body;
ContentTransferEncoding = att.Headers["Content-Transfer-Encoding"].RawValue;
ContentType = att.Headers["Content-Type"].RawValue;
}
}
Date = Headers.GetDate();
To = Headers.GetMailAddresses("To").ToList();
Cc = Headers.GetMailAddresses("Cc").ToList();
Bcc = Headers.GetMailAddresses("Bcc").ToList();
Sender = Headers.GetMailAddresses("Sender").FirstOrDefault();
ReplyTo = Headers.GetMailAddresses("Reply-To").ToList();
From = Headers.GetMailAddresses("From").FirstOrDefault();
MessageID = Headers["Message-ID"].RawValue;
Importance = Headers.GetEnum<MailPriority>("Importance");
Subject = Headers["Subject"].RawValue;
}
private static string ParseMime(Stream reader, string boundary, ref int maxLength, ICollection<Attachment> attachments, Encoding encoding, char? termChar) {
var maxLengthSpecified = maxLength > 0;
string data = null,
bounderInner = "--" + boundary,
bounderOuter = bounderInner + "--";
var n = 0;
var body = new System.Text.StringBuilder();
do {
if (maxLengthSpecified && maxLength <= 0)
return body.ToString();
if (data != null) {
body.Append(data);
}
data = reader.ReadLine(ref maxLength, encoding, termChar);
n++;
} while (data != null && !data.StartsWith(bounderInner));
while (data != null && !data.StartsWith(bounderOuter) && !(maxLengthSpecified && maxLength == 0)) {
data = reader.ReadLine(ref maxLength, encoding, termChar);
if (data == null) break;
var a = new Attachment { Encoding = encoding };
var part = new StringBuilder();
// read part header
while (!data.StartsWith(bounderInner) && data != string.Empty && !(maxLengthSpecified && maxLength == 0)) {
part.AppendLine(data);
data = reader.ReadLine(ref maxLength, encoding, termChar);
if (data == null) break;
}
a.RawHeaders = part.ToString();
// header body
// check for nested part
var nestedboundary = a.Headers.GetBoundary();
if (!string.IsNullOrEmpty(nestedboundary)) {
ParseMime(reader, nestedboundary, ref maxLength, attachments, encoding, termChar);
while (!data.StartsWith(bounderInner))
data = reader.ReadLine(ref maxLength, encoding, termChar);
} else {
data = reader.ReadLine(ref maxLength, a.Encoding, termChar);
if (data == null) break;
var nestedBody = new StringBuilder();
while (!data.StartsWith(bounderInner) && !(maxLengthSpecified && maxLength == 0)) {
nestedBody.AppendLine(data);
data = reader.ReadLine(ref maxLength, a.Encoding, termChar);
}
a.SetBody(nestedBody.ToString());
attachments.Add(a);
}
}
return body.ToString();
}
private static Dictionary<string, int> _FlagCache = System.Enum.GetValues(typeof(Flags)).Cast<Flags>().ToDictionary(x => x.ToString(), x => (int)x, StringComparer.OrdinalIgnoreCase);
internal void SetFlags(string flags) {
RawFlags = flags.Split(' ').Distinct(StringComparer.OrdinalIgnoreCase).ToArray();
Flags = (Flags)RawFlags.Select(x => {
int flag = 0;
if (_FlagCache.TryGetValue(x.TrimStart('\\'), out flag))
return flag;
else
return 0;
}).Sum();
}
public virtual void Save(System.IO.Stream stream, Encoding encoding = null) {
using (var str = new System.IO.StreamWriter(stream, encoding ?? System.Text.Encoding.Default))
Save(str);
}
private static readonly string[] SpecialHeaders = "Date,To,Cc,Reply-To,Bcc,Sender,From,Message-ID,Importance,Subject".Split(',');
public virtual void Save(System.IO.TextWriter txt) {
txt.WriteLine("Date: {0}", Date.GetRFC2060Date());
txt.WriteLine("To: {0}", string.Join("; ", To.Select(x => x.ToString())));
txt.WriteLine("Cc: {0}", string.Join("; ", Cc.Select(x => x.ToString())));
txt.WriteLine("Reply-To: {0}", string.Join("; ", ReplyTo.Select(x => x.ToString())));
txt.WriteLine("Bcc: {0}", string.Join("; ", Bcc.Select(x => x.ToString())));
if (Sender != null)
txt.WriteLine("Sender: {0}", Sender);
if (From != null)
txt.WriteLine("From: {0}", From);
if (!string.IsNullOrEmpty(MessageID))
txt.WriteLine("Message-ID: {0}", MessageID);
var otherHeaders = Headers.Where(x => !SpecialHeaders.Contains(x.Key, StringComparer.InvariantCultureIgnoreCase));
foreach (var header in otherHeaders) {
txt.WriteLine("{0}: {1}", header.Key, header.Value);
}
if (Importance != MailPriority.Normal)
txt.WriteLine("Importance: {0}", (int)Importance);
txt.WriteLine("Subject: {0}", Subject);
txt.WriteLine();
//todo: attachments
txt.Write(Body);
}
}
}