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.");
}
Article article = new Article();
Response res = 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));
article.MessageId = res.Message.Substring(i + 1, res.Message.IndexOf(' ', i + 1));
MIMEPart part = null;
article.Header = this.GetHeader(messageId, out part);
if (part == null)
{
article.Body = this.GetNormalBody(messageId);
}
else
{
article.Body = this.GetMIMEBody(messageId, part);
}
return(article);
}
private ArticleBody GetMIMEBody(string messageId, MIMEPart part)
{
string line = null;
ArticleBody body = null;
StringBuilder sb = null;
ArrayList attachmentList = new ArrayList();
try
{
NntpUtil.DispatchMIMEContent(sr, part, ".");
sb = new StringBuilder();
attachmentList = new ArrayList();
body = new ArticleBody();
body.IsHtml = true;
this.ConvertMIMEContent(messageId, part, sb, attachmentList);
body.Text = sb.ToString();
body.Attachments = (Attachment[])attachmentList.ToArray(typeof(Attachment));
}
finally
{
if (((NetworkStream)sr.BaseStream).DataAvailable)
{
while ((line = sr.ReadLine()) != null && line != ".")
{
;
}
}
}
return(body);
}
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;
}
Attachment attachment = new Attachment(messageId + " - " + part.Filename, part.Filename, part.BinaryData);
attachmentList.Add(attachment);
}
private ArticleHeader GetHeader(string messageId, out MIMEPart part)
{
string response = null;
ArticleHeader 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 = sr.ReadLine()) != null && response != "")
{
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.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":
i = value.IndexOf(',');
header.Date = DateTime.Parse(value.Substring(i + 1, value.Length - 7 - i));
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);
}
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 != "" )
{
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 char[]{'\\', '/'}) + 1 );
}
line = sr.ReadLine();
}
part.EmbeddedPartList.Add(DispatchMIMEContent(sr, newPart, "--" + part.Boundary));
}
break;
case "TEXT":
ms = new MemoryStream();
bytes = null;
long pos;
StreamReader msr = new StreamReader(ms, Encoding.GetEncoding(part.Charset));
StringBuilder sb = new StringBuilder();
while ( (line = sr.ReadLine()) != null && line != seperator && line != seperator + "--" )
{
pos = ms.Position;
if ( line != "" )
{
switch ( part.ContentTransferEncoding.ToUpper() )
{
case "QUOTED-PRINTABLE":
NntpUtil.QuotedPrintableDecode(line, ms);
break;
case "BASE64":
if ( line != null && line != "" )
NntpUtil.Base64Decode(line, ms);
break;
case "UU":
if ( line != null && line != "" )
NntpUtil.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 != "" )
{
switch ( part.ContentTransferEncoding.ToUpper() )
{
case "QUOTED-PRINTABLE":
NntpUtil.QuotedPrintableDecode(line, ms);
break;
case "BASE64":
if ( line != null && line != "" )
NntpUtil.Base64Decode(line, ms);
break;
case "UU":
if ( line != null && line != "" )
NntpUtil.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;
}
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 != "")
{
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 char[] { '\\', '/' }) + 1);
}
line = sr.ReadLine();
}
part.EmbeddedPartList.Add(DispatchMIMEContent(sr, newPart, "--" + part.Boundary));
}
break;
case "TEXT":
ms = new MemoryStream();
bytes = null;
long pos;
StreamReader msr = new StreamReader(ms, Encoding.GetEncoding(part.Charset));
StringBuilder sb = new StringBuilder();
while ((line = sr.ReadLine()) != null && line != seperator && line != seperator + "--")
{
pos = ms.Position;
if (line != "")
{
switch (part.ContentTransferEncoding.ToUpper())
{
case "QUOTED-PRINTABLE":
NntpUtil.QuotedPrintableDecode(line, ms);
break;
case "BASE64":
if (line != null && line != "")
{
NntpUtil.Base64Decode(line, ms);
}
break;
case "UU":
if (line != null && line != "")
{
NntpUtil.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 != "")
{
switch (part.ContentTransferEncoding.ToUpper())
{
case "QUOTED-PRINTABLE":
NntpUtil.QuotedPrintableDecode(line, ms);
break;
case "BASE64":
if (line != null && line != "")
{
NntpUtil.Base64Decode(line, ms);
}
break;
case "UU":
if (line != null && line != "")
{
NntpUtil.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);
}
