/// <summary>
/// The convert mime content.
/// </summary>
/// <param name="messageId">
/// The message id.
/// </param>
/// <param name="part">
/// The part.
/// </param>
/// <param name="sb">
/// The sb.
/// </param>
/// <param name="attachmentList">
/// The attachment list.
/// </param>
private void ConvertMIMEContent(string messageId, MIMEPart part, StringBuilder sb, ArrayList attachmentList)
{
Match m = null;
m = Regex.Match(part.ContentType, @"MULTIPART", RegexOptions.IgnoreCase);
if (m.Success)
{
foreach (MIMEPart subPart in part.EmbeddedPartList)
{
this.ConvertMIMEContent(messageId, subPart, sb, attachmentList);
}
return;
}
m = Regex.Match(part.ContentType, @"TEXT", RegexOptions.IgnoreCase);
if (m.Success)
{
sb.Append(part.Text);
sb.Append("<hr>");
return;
}
var attachment = new Attachment(messageId + " - " + part.Filename, part.Filename, part.BinaryData);
attachmentList.Add(attachment);
}
/// <summary>
/// The get mime body.
/// </summary>
/// <param name="messageId">
/// The message id.
/// </param>
/// <param name="part">
/// The part.
/// </param>
/// <returns>
/// </returns>
private ArticleBody GetMIMEBody(string messageId, MIMEPart part)
{
string line = null;
ArticleBody body = null;
StringBuilder sb = null;
var attachmentList = new ArrayList();
try
{
NntpUtil.DispatchMIMEContent(this.sr, part, ".");
sb = new StringBuilder();
attachmentList = new ArrayList();
body = new ArticleBody {
IsHtml = true
};
this.ConvertMIMEContent(messageId, part, sb, attachmentList);
body.Text = sb.ToString();
body.Attachments = (Attachment[])attachmentList.ToArray(typeof(Attachment));
}
finally
{
if (((NetworkStream)this.sr.BaseStream).DataAvailable)
{
while ((line = this.sr.ReadLine()) != null && line != ".")
{
;
}
}
}
return(body);
}
public Article GetArticle(string messageId)
{
if (this.connectedServer == null)
{
throw new NntpException("No connecting newsserver.");
}
if (this.connectedGroup == null)
{
throw new NntpException("No connecting newsgroup.");
}
var article = new Article();
Response res = this.MakeRequest("Article " + messageId);
if (res.Code != 220)
{
throw new NntpException(res.Code);
}
int i = res.Message.IndexOf(' ');
article.ArticleId = int.Parse(res.Message.Substring(0, i));
int end = res.Message.Substring(i, res.Message.Length - i - 1).Trim().IndexOf(' ');
if (end == -1)
{
end = res.Message.Length - (i + 1);
}
article.MessageId = res.Message.Substring(i + 1, end);
MIMEPart part = null;
article.Header = this.GetHeader(messageId, out part);
article.MimePart = part;
article.Body = article.MimePart == null?this.GetNormalBody(article.MessageId) : this.GetMIMEBody(article.MessageId, article.MimePart);
return(article);
}
/// <summary>
/// The convert mime content.
/// </summary>
/// <param name="messageId">
/// The message id.
/// </param>
/// <param name="part">
/// The part.
/// </param>
/// <param name="sb">
/// The sb.
/// </param>
/// <param name="attachmentList">
/// The attachment list.
/// </param>
private void ConvertMIMEContent(string messageId, MIMEPart part, StringBuilder sb, ArrayList attachmentList)
{
Match m = null;
m = Regex.Match(part.ContentType, @"MULTIPART", RegexOptions.IgnoreCase);
if (m.Success)
{
foreach (MIMEPart subPart in part.EmbeddedPartList)
{
this.ConvertMIMEContent(messageId, subPart, sb, attachmentList);
}
return;
}
m = Regex.Match(part.ContentType, @"TEXT", RegexOptions.IgnoreCase);
if (m.Success)
{
sb.Append(part.Text);
sb.Append("<hr>");
return;
}
var attachment = new Attachment(messageId + " - " + part.Filename, part.Filename, part.BinaryData);
attachmentList.Add(attachment);
}
/// <summary>
/// The get mime body.
/// </summary>
/// <param name="messageId">
/// The message id.
/// </param>
/// <param name="part">
/// The part.
/// </param>
/// <returns>
/// </returns>
private ArticleBody GetMIMEBody(string messageId, MIMEPart part)
{
string line = null;
ArticleBody body = null;
StringBuilder sb = null;
var attachmentList = new ArrayList();
try
{
NntpUtil.DispatchMIMEContent(this.sr, part, ".");
sb = new StringBuilder();
attachmentList = new ArrayList();
body = new ArticleBody { IsHtml = true };
this.ConvertMIMEContent(messageId, part, sb, attachmentList);
body.Text = sb.ToString();
body.Attachments = (Attachment[]) attachmentList.ToArray(typeof (Attachment));
}
finally
{
if (((NetworkStream) this.sr.BaseStream).DataAvailable)
{
while ((line = this.sr.ReadLine()) != null && line != ".")
{
;
}
}
}
return body;
}
/// <summary>
/// The get header.
/// </summary>
/// <param name="messageId">
/// The message id.
/// </param>
/// <param name="part">
/// The part.
/// </param>
/// <returns>
/// </returns>
private ArticleHeader GetHeader(string messageId, out MIMEPart part)
{
string response = null;
var header = new ArticleHeader();
string name = null;
string value = null;
header.ReferenceIds = new string[0];
string[] values = null;
string[] values2 = null;
Match m = null;
part = null;
int i = -1;
while ((response = this.sr.ReadLine()) != null && response != string.Empty)
{
m = Regex.Match(response, @"^\s+(\S+)$");
if (m.Success)
{
value = m.Groups[1].ToString();
}
else
{
i = response.IndexOf(':');
if (i == -1)
{
continue;
}
name = response.Substring(0, i).ToUpper();
value = response.Substring(i + 1);
}
switch (name)
{
case "REFERENCES":
values = value.Trim().Split(' ');
values2 = header.ReferenceIds;
header.ReferenceIds = new string[values.Length + values2.Length];
values.CopyTo(header.ReferenceIds, 0);
values2.CopyTo(header.ReferenceIds, values.Length);
break;
case "SUBJECT":
header.Subject += NntpUtil.Base64HeaderDecode(value);
break;
case "DATE":
// vzrus: 31.03.10 dateTime and tz conversion
int offTz;
header.Date = NntpUtil.DecodeUTC(value, out offTz);
header.TimeZoneOffset = offTz;
break;
case "FROM":
header.From += NntpUtil.Base64HeaderDecode(value);
break;
case "NNTP-POSTING-HOST":
header.PostingHost += value;
break;
case "LINES":
header.LineCount = int.Parse(value);
break;
case "MIME-VERSION":
part = new MIMEPart();
part.ContentType = "TEXT/PLAIN";
part.Charset = "US-ASCII";
part.ContentTransferEncoding = "7BIT";
part.Filename = null;
part.Boundary = null;
break;
case "CONTENT-TYPE":
if (part != null)
{
m = Regex.Match(response, @"CONTENT-TYPE: ""?([^""\s;]+)", RegexOptions.IgnoreCase);
if (m.Success)
{
part.ContentType = m.Groups[1].ToString();
}
m = Regex.Match(response, @"BOUNDARY=""?([^""\s;]+)", RegexOptions.IgnoreCase);
if (m.Success)
{
part.Boundary = m.Groups[1].ToString();
part.EmbeddedPartList = new ArrayList();
}
m = Regex.Match(response, @"CHARSET=""?([^""\s;]+)", RegexOptions.IgnoreCase);
if (m.Success)
{
part.Charset = m.Groups[1].ToString();
}
m = Regex.Match(response, @"NAME=""?([^""\s;]+)", RegexOptions.IgnoreCase);
if (m.Success)
{
part.Filename = m.Groups[1].ToString();
}
}
break;
case "CONTENT-TRANSFER-ENCODING":
if (part != null)
{
m = Regex.Match(response, @"CONTENT-TRANSFER-ENCODING: ""?([^""\s;]+)", RegexOptions.IgnoreCase);
if (m.Success)
{
part.ContentTransferEncoding = m.Groups[1].ToString();
}
}
break;
}
}
return header;
}
/// <summary>
/// The dispatch mime content.
/// </summary>
/// <param name="sr">
/// The sr.
/// </param>
/// <param name="part">
/// The part.
/// </param>
/// <param name="seperator">
/// The seperator.
/// </param>
/// <returns>
/// </returns>
public static MIMEPart DispatchMIMEContent(StreamReader sr, MIMEPart part, string seperator)
{
string line = null;
Match m = null;
MemoryStream ms;
byte[] bytes;
switch (part.ContentType.Substring(0, part.ContentType.IndexOf('/')).ToUpper())
{
case "MULTIPART":
MIMEPart newPart = null;
while ((line = sr.ReadLine()) != null && line != seperator && line != seperator + "--")
{
m = Regex.Match(line, @"CONTENT-TYPE: ""?([^""\s;]+)", RegexOptions.IgnoreCase);
if (!m.Success)
{
continue;
}
newPart = new MIMEPart();
newPart.ContentType = m.Groups[1].ToString();
newPart.Charset = "US-ASCII";
newPart.ContentTransferEncoding = "7BIT";
while (line != string.Empty)
{
m = Regex.Match(line, @"BOUNDARY=""?([^""\s;]+)", RegexOptions.IgnoreCase);
if (m.Success)
{
newPart.Boundary = m.Groups[1].ToString();
newPart.EmbeddedPartList = new ArrayList();
}
m = Regex.Match(line, @"CHARSET=""?([^""\s;]+)", RegexOptions.IgnoreCase);
if (m.Success)
{
newPart.Charset = m.Groups[1].ToString();
}
m = Regex.Match(line, @"CONTENT-TRANSFER-ENCODING: ""?([^""\s;]+)", RegexOptions.IgnoreCase);
if (m.Success)
{
newPart.ContentTransferEncoding = m.Groups[1].ToString();
}
m = Regex.Match(line, @"NAME=""?([^""\s;]+)", RegexOptions.IgnoreCase);
if (m.Success)
{
newPart.Filename = Base64HeaderDecode(m.Groups[1].ToString());
newPart.Filename = newPart.Filename.Substring(newPart.Filename.LastIndexOfAny(new[] { '\\', '/' }) + 1);
}
line = sr.ReadLine();
}
part.EmbeddedPartList.Add(DispatchMIMEContent(sr, newPart, "--" + part.Boundary));
}
break;
case "TEXT":
ms = new MemoryStream();
bytes = null;
long pos;
var msr = new StreamReader(ms, Encoding.GetEncoding(part.Charset));
var sb = new StringBuilder();
while ((line = sr.ReadLine()) != null && line != seperator && line != seperator + "--")
{
pos = ms.Position;
if (line != string.Empty)
{
switch (part.ContentTransferEncoding.ToUpper())
{
case "QUOTED-PRINTABLE":
QuotedPrintableDecode(line, ms);
break;
case "BASE64":
if (line != null && line != string.Empty)
{
Base64Decode(line, ms);
}
break;
case "UU":
if (line != null && line != string.Empty)
{
UUDecode(line, ms);
}
break;
case "7BIT":
bytes = Encoding.ASCII.GetBytes(line);
ms.Write(bytes, 0, bytes.Length);
ms.WriteByte((byte)'\n');
break;
default:
bytes = Encoding.ASCII.GetBytes(line);
ms.Write(bytes, 0, bytes.Length);
ms.WriteByte((byte)'\n');
break;
}
}
ms.Position = pos;
if (part.ContentType.ToUpper() == "TEXT/HTML")
{
sb.Append(msr.ReadToEnd());
}
else
{
sb.Append(HttpUtility.HtmlEncode(msr.ReadToEnd()).Replace("\n", "<br>\n"));
}
}
part.Text = sb.ToString();
break;
default:
ms = new MemoryStream();
bytes = null;
while ((line = sr.ReadLine()) != null && line != seperator && line != seperator + "--")
{
if (line != string.Empty)
{
switch (part.ContentTransferEncoding.ToUpper())
{
case "QUOTED-PRINTABLE":
QuotedPrintableDecode(line, ms);
break;
case "BASE64":
if (line != null && line != string.Empty)
{
Base64Decode(line, ms);
}
break;
case "UU":
if (line != null && line != string.Empty)
{
UUDecode(line, ms);
}
break;
default:
bytes = Encoding.ASCII.GetBytes(line);
ms.Write(bytes, 0, bytes.Length);
break;
}
}
}
ms.Seek(0, SeekOrigin.Begin);
part.BinaryData = new byte[ms.Length];
ms.Read(part.BinaryData, 0, (int)ms.Length);
break;
}
return(part);
}
/// <summary>
/// The dispatch mime content.
/// </summary>
/// <param name="sr">
/// The sr.
/// </param>
/// <param name="part">
/// The part.
/// </param>
/// <param name="seperator">
/// The seperator.
/// </param>
/// <returns>
/// </returns>
public static MIMEPart DispatchMIMEContent(StreamReader sr, MIMEPart part, string seperator)
{
string line = null;
Match m = null;
MemoryStream ms;
byte[] bytes;
switch (part.ContentType.Substring(0, part.ContentType.IndexOf('/')).ToUpper())
{
case "MULTIPART":
MIMEPart newPart = null;
while ((line = sr.ReadLine()) != null && line != seperator && line != seperator + "--")
{
m = Regex.Match(line, @"CONTENT-TYPE: ""?([^""\s;]+)", RegexOptions.IgnoreCase);
if (!m.Success)
{
continue;
}
newPart = new MIMEPart();
newPart.ContentType = m.Groups[1].ToString();
newPart.Charset = "US-ASCII";
newPart.ContentTransferEncoding = "7BIT";
while (line != string.Empty)
{
m = Regex.Match(line, @"BOUNDARY=""?([^""\s;]+)", RegexOptions.IgnoreCase);
if (m.Success)
{
newPart.Boundary = m.Groups[1].ToString();
newPart.EmbeddedPartList = new ArrayList();
}
m = Regex.Match(line, @"CHARSET=""?([^""\s;]+)", RegexOptions.IgnoreCase);
if (m.Success)
{
newPart.Charset = m.Groups[1].ToString();
}
m = Regex.Match(line, @"CONTENT-TRANSFER-ENCODING: ""?([^""\s;]+)", RegexOptions.IgnoreCase);
if (m.Success)
{
newPart.ContentTransferEncoding = m.Groups[1].ToString();
}
m = Regex.Match(line, @"NAME=""?([^""\s;]+)", RegexOptions.IgnoreCase);
if (m.Success)
{
newPart.Filename = Base64HeaderDecode(m.Groups[1].ToString());
newPart.Filename = newPart.Filename.Substring(newPart.Filename.LastIndexOfAny(new[] { '\\', '/' }) + 1);
}
line = sr.ReadLine();
}
part.EmbeddedPartList.Add(DispatchMIMEContent(sr, newPart, "--" + part.Boundary));
}
break;
case "TEXT":
ms = new MemoryStream();
bytes = null;
long pos;
var msr = new StreamReader(ms, Encoding.GetEncoding(part.Charset));
var sb = new StringBuilder();
while ((line = sr.ReadLine()) != null && line != seperator && line != seperator + "--")
{
pos = ms.Position;
if (line != string.Empty)
{
switch (part.ContentTransferEncoding.ToUpper())
{
case "QUOTED-PRINTABLE":
QuotedPrintableDecode(line, ms);
break;
case "BASE64":
if (line != null && line != string.Empty)
{
Base64Decode(line, ms);
}
break;
case "UU":
if (line != null && line != string.Empty)
{
UUDecode(line, ms);
}
break;
case "7BIT":
bytes = Encoding.ASCII.GetBytes(line);
ms.Write(bytes, 0, bytes.Length);
ms.WriteByte((byte)'\n');
break;
default:
bytes = Encoding.ASCII.GetBytes(line);
ms.Write(bytes, 0, bytes.Length);
ms.WriteByte((byte)'\n');
break;
}
}
ms.Position = pos;
if (part.ContentType.ToUpper() == "TEXT/HTML")
{
sb.Append(msr.ReadToEnd());
}
else
{
sb.Append(HttpUtility.HtmlEncode(msr.ReadToEnd()).Replace("\n", "<br>\n"));
}
}
part.Text = sb.ToString();
break;
default:
ms = new MemoryStream();
bytes = null;
while ((line = sr.ReadLine()) != null && line != seperator && line != seperator + "--")
{
if (line != string.Empty)
{
switch (part.ContentTransferEncoding.ToUpper())
{
case "QUOTED-PRINTABLE":
QuotedPrintableDecode(line, ms);
break;
case "BASE64":
if (line != null && line != string.Empty)
{
Base64Decode(line, ms);
}
break;
case "UU":
if (line != null && line != string.Empty)
{
UUDecode(line, ms);
}
break;
default:
bytes = Encoding.ASCII.GetBytes(line);
ms.Write(bytes, 0, bytes.Length);
break;
}
}
}
ms.Seek(0, SeekOrigin.Begin);
part.BinaryData = new byte[ms.Length];
ms.Read(part.BinaryData, 0, (int)ms.Length);
break;
}
return part;
}
/// <summary>
/// The get header.
/// </summary>
/// <param name="messageId">
/// The message id.
/// </param>
/// <param name="part">
/// The part.
/// </param>
/// <returns>
/// </returns>
private ArticleHeader GetHeader(string messageId, out MIMEPart part)
{
string response = null;
var header = new ArticleHeader();
string name = null;
string value = null;
header.ReferenceIds = new string[0];
string[] values = null;
string[] values2 = null;
Match m = null;
part = null;
int i = -1;
while ((response = this.sr.ReadLine()) != null && response != string.Empty)
{
m = Regex.Match(response, @"^\s+(\S+)$");
if (m.Success)
{
value = m.Groups[1].ToString();
}
else
{
i = response.IndexOf(':');
if (i == -1)
{
continue;
}
name = response.Substring(0, i).ToUpper();
value = response.Substring(i + 1);
}
switch (name)
{
case "REFERENCES":
values = value.Trim().Split(' ');
values2 = header.ReferenceIds;
header.ReferenceIds = new string[values.Length + values2.Length];
values.CopyTo(header.ReferenceIds, 0);
values2.CopyTo(header.ReferenceIds, values.Length);
break;
case "SUBJECT":
header.Subject += NntpUtil.Base64HeaderDecode(value);
break;
case "DATE":
// vzrus: 31.03.10 dateTime and tz conversion
int offTz;
header.Date = NntpUtil.DecodeUTC(value, out offTz);
header.TimeZoneOffset = offTz;
break;
case "FROM":
header.From += NntpUtil.Base64HeaderDecode(value);
break;
case "NNTP-POSTING-HOST":
header.PostingHost += value;
break;
case "LINES":
header.LineCount = int.Parse(value);
break;
case "MIME-VERSION":
part = new MIMEPart();
part.ContentType = "TEXT/PLAIN";
part.Charset = "US-ASCII";
part.ContentTransferEncoding = "7BIT";
part.Filename = null;
part.Boundary = null;
break;
case "CONTENT-TYPE":
if (part != null)
{
m = Regex.Match(response, @"CONTENT-TYPE: ""?([^""\s;]+)", RegexOptions.IgnoreCase);
if (m.Success)
{
part.ContentType = m.Groups[1].ToString();
}
m = Regex.Match(response, @"BOUNDARY=""?([^""\s;]+)", RegexOptions.IgnoreCase);
if (m.Success)
{
part.Boundary = m.Groups[1].ToString();
part.EmbeddedPartList = new ArrayList();
}
m = Regex.Match(response, @"CHARSET=""?([^""\s;]+)", RegexOptions.IgnoreCase);
if (m.Success)
{
part.Charset = m.Groups[1].ToString();
}
m = Regex.Match(response, @"NAME=""?([^""\s;]+)", RegexOptions.IgnoreCase);
if (m.Success)
{
part.Filename = m.Groups[1].ToString();
}
}
break;
case "CONTENT-TRANSFER-ENCODING":
if (part != null)
{
m = Regex.Match(response, @"CONTENT-TRANSFER-ENCODING: ""?([^""\s;]+)", RegexOptions.IgnoreCase);
if (m.Success)
{
part.ContentTransferEncoding = m.Groups[1].ToString();
}
}
break;
}
}
return(header);
}
