/// <summary>
/// Persists an article to the backing store
/// </summary>
/// <param name="clientUsername">Authenticated username</param>
/// <param name="data">Article data posted from NNTP client</param>
/// <returns>String which will be returned to the client</returns>
public string PostArticle(string clientUsername, string data)
{
try
{
if (data.Length > MaxPostLengthBytes)
{
//System.Diagnostics.Trace.WriteLine("Posting failed - maximum post length exceeded");
//return PostStatus.FailedExcessiveLength;
return(GeneralResponses.PostingFailedExcessiveLength);
}
var articleBody = new StringBuilder();
var article = new Article {
ContentType = string.Empty
};
char[] delimiter = { '\r' };
bool isHeader = true;
bool isMimePost = false;
// undo dot stuffing
//data = data.Replace("\r\n..\r\n", "\r\n.\r\n");
//data = data.Replace("\r\n..", "\r\n.");
string[] lines = data.Split(delimiter);
//Regex extendedChars = new Regex("[^\\u0009-\\u007e]", RegexOptions.Multiline | RegexOptions.IgnoreCase);
string lastKeyValue = string.Empty;
string line;
foreach (var lineIter in lines)
{
line = lineIter.Replace("\n", string.Empty);
//line = extendedChars.Replace(line, string.Empty);
//System.Diagnostics.Trace.WriteLine("Processing line -|" + line + "|");
if (isHeader && string.IsNullOrEmpty(line))
{
isHeader = false;
continue;
}
if (isHeader)
{
var nameValuePair = new ArrayList(2);
if (line.IndexOf(": ") > 0)
{
nameValuePair.Add(line.Substring(0, line.IndexOf(": ")).Trim());
lastKeyValue = nameValuePair[0].ToString();
}
else
{
nameValuePair.Add(string.Empty);
}
nameValuePair.Add(line.Substring(line.IndexOf(": ") + 2).Trim());
string keyValue = nameValuePair[0].ToString();
if (string.Compare(keyValue, HeaderNames.From, StringComparison.InvariantCultureIgnoreCase) == 0)
{
article.From = nameValuePair[1].ToString();
}
else if (string.Compare(keyValue, HeaderNames.Date, StringComparison.InvariantCultureIgnoreCase) == 0)
{
article.Date = nameValuePair[1].ToString();
}
else if (string.Compare(keyValue, HeaderNames.Subject, StringComparison.InvariantCultureIgnoreCase) == 0)
{
// Also support newreaders with post the "subject" in multiple lines
article.Subject = nameValuePair[1].ToString();
}
else if (string.Compare(keyValue, HeaderNames.Newsgroups, StringComparison.InvariantCultureIgnoreCase) == 0)
{
article.Newsgroups = nameValuePair[1].ToString().Replace("\"", string.Empty).Replace("'", string.Empty);
}
else if (string.Compare(keyValue, HeaderNames.UserAgent, StringComparison.InvariantCultureIgnoreCase) == 0)
{
article.UserAgent = nameValuePair[1].ToString();
}
else if (string.Compare(keyValue, HeaderNames.XNewsreader, StringComparison.InvariantCultureIgnoreCase) == 0)
{
if (string.IsNullOrEmpty(article.UserAgent))
{
article.UserAgent = nameValuePair[1].ToString(); // The "User-Agent" is embedded into the html, so either use "User-Agent" or "X-Newsreader"
}
article.XNewsreader = nameValuePair[1].ToString();
}
// TODO: Also support of "X-Mailer:" !?
else if (string.Compare(keyValue, HeaderNames.References, StringComparison.InvariantCultureIgnoreCase) == 0)
{
article.References = nameValuePair[1].ToString();
}
else if (string.Compare(keyValue, HeaderNames.ContentType, StringComparison.InvariantCultureIgnoreCase) == 0)
{
// Also support newreaders with post the "content-type" in multiple lines, like:
// Content-Type: text/plain;
// format=flowed;
// charset="iso-8859-1";
// reply-type=original
article.ContentType = nameValuePair[1].ToString();
}
else if (string.Compare(keyValue, HeaderNames.ContentTransferEncoding, StringComparison.InvariantCultureIgnoreCase) == 0)
{
article.ContentTransferEncoding = nameValuePair[1].ToString();
}
else if (keyValue.Length == 0)
{
// Multi-Line Header:
if (string.Compare(lastKeyValue, HeaderNames.From, StringComparison.InvariantCultureIgnoreCase) == 0)
{
article.From += nameValuePair[1].ToString();
}
else if (string.Compare(lastKeyValue, HeaderNames.Date, StringComparison.InvariantCultureIgnoreCase) == 0)
{
article.Date += nameValuePair[1].ToString();
}
else if (string.Compare(lastKeyValue, HeaderNames.Subject, StringComparison.InvariantCultureIgnoreCase) == 0)
{
article.Subject += nameValuePair[1].ToString();
}
else if (string.Compare(lastKeyValue, HeaderNames.Newsgroups, StringComparison.InvariantCultureIgnoreCase) == 0)
{
article.Newsgroups += nameValuePair[1].ToString().Replace("\"", string.Empty).Replace("'", string.Empty);
}
else if (string.Compare(lastKeyValue, HeaderNames.UserAgent, StringComparison.InvariantCultureIgnoreCase) == 0)
{
article.UserAgent += nameValuePair[1].ToString();
}
else if (string.Compare(lastKeyValue, HeaderNames.XNewsreader, StringComparison.InvariantCultureIgnoreCase) == 0)
{
//if (string.IsNullOrEmpty(article.UserAgent))
// article.UserAgent = nameValuePair[1].ToString(); // The "User-Agent" is embedded into the html, so either use "User-Agent" or "X-Newsreader"
article.XNewsreader += nameValuePair[1].ToString();
}
// TODO: Also support of "X-Mailer:" !?
else if (string.Compare(lastKeyValue, HeaderNames.References, StringComparison.InvariantCultureIgnoreCase) == 0)
{
article.References += nameValuePair[1].ToString();
}
else if (string.Compare(lastKeyValue, HeaderNames.ContentType, StringComparison.InvariantCultureIgnoreCase) == 0)
{
article.ContentType += nameValuePair[1].ToString();
}
else if (string.Compare(lastKeyValue, HeaderNames.ContentTransferEncoding, StringComparison.InvariantCultureIgnoreCase) == 0)
{
article.ContentTransferEncoding += nameValuePair[1].ToString();
}
}
else
{
}
} // isHeader
else
{
// Body:
// undo dot stuff (remove the first dott, if there are two dots...
if (line.IndexOf("..", StringComparison.InvariantCultureIgnoreCase) == 0)
{
line = line.Substring(1);
}
articleBody.Append(line + "\n");
}
} // foreach
article.Body = articleBody.ToString();
// Check for mimePostings:
if (article.ContentType.IndexOf("multipart", StringComparison.InvariantCultureIgnoreCase) == 0)
{
isMimePost = true;
}
if (isMimePost)
{
var mime = new Mime {
Text = article.Body
};
// Exract boundary:
var m2 = _bondaryRegex.Match(article.ContentType);
if (m2.Success)
{
mime.Boundary = m2.Groups[1].Value;
}
string textPlain = null;
string textPlainContentType = null;
string textHtml = null;
string textHtmlContentType = null;
foreach (var mimePart in mime.MimeParts)
{
var ct = mimePart.GetPropertyValue("Content-Type");
if (ct.IndexOf("text/plain", StringComparison.InvariantCultureIgnoreCase) >= 0)
{
textPlainContentType = ct;
textPlain = (string)mimePart.Decode();
}
if (ct.IndexOf("text/html", StringComparison.InvariantCultureIgnoreCase) >= 0)
{
textHtmlContentType = ct;
textHtml = (string)mimePart.Decode();
}
if ((textPlain != null) && (textHtml != null))
{
break;
}
}
if ((textPlain == null) && (textHtml == null))
{
//System.Diagnostics.Trace.WriteLine("Posting failed - text part not found");
//return PostStatus.FailedTextPartMissingInHtml;
return(GeneralResponses.PostingFailedTextPartMissingInMime);
}
if (InMimeUseHtml && (textHtml != null))
{
article.Body = textHtml;
article.ContentType = textHtmlContentType;
Traces.NntpServerTraceEvent(TraceEventType.Verbose, "MIME-Part: HTML selected");
}
else
{
if (textPlain != null)
{
article.Body = textPlain;
article.ContentType = textPlainContentType;
Traces.NntpServerTraceEvent(TraceEventType.Verbose, "MIME-Part: plain/text selected");
}
else
{
article.Body = textHtml;
article.ContentType = textHtmlContentType;
Traces.NntpServerTraceEvent(TraceEventType.Verbose, "MIME-Part: HTML selected (no plain/text available)");
}
}
}
// Transcode the "body" according to the "charset", if one is specified:
var charSetMatch = _charSetRegex.Match(article.ContentType);
string charSet = Server.EncodingRecv.HeaderName; // default
if (charSetMatch.Success)
{
charSet = charSetMatch.Groups[1].Value;
}
if (isMimePost == false)
{
if (article.ContentTransferEncoding.IndexOf("quoted-printable", StringComparison.InvariantCultureIgnoreCase) >= 0)
{
article.Body = MimePart.DecodeQuotedPrintable(article.Body);
}
else if (article.ContentTransferEncoding.IndexOf("base64", StringComparison.InvariantCultureIgnoreCase) >= 0)
{
article.Body = MimePart.DecodeBase64(article.Body, charSet);
}
}
// Re-Encode after all data is now in the body...
ReEncode(article, charSet);
// post must have subject
if (article.Subject.Trim().Length == 0)
{
//System.Diagnostics.Trace.WriteLine("Posting failed - no subject line");
//return PostStatus.FailedSubjectLineBlank;
return(GeneralResponses.PostingFailedSubjectLineBlank);
}
// Decode Subject
article.Subject = Mime.DecodeEncodedWordValue(article.Subject);
var articles = new List <Article>();
// Disabled cross posting (2010-06-06)
//// Cross-Postings (Multiple-Postings) are allowed for "primary messages":
//if ( (string.IsNullOrEmpty(article.References)) && (article.Newsgroups.IndexOf(",", StringComparison.InvariantCultureIgnoreCase) > 0) )
//{
// string[] groupNames = article.Newsgroups.Split(',');
// foreach (var groupName in groupNames)
// {
// Newsgroup group = GetNewsgroupFromCacheOrServer(groupName.Trim());
// if (group != null && group.PostingAllowed)
// {
// // copy the article...
// var crossPostArticle = new Article();
// crossPostArticle.From = article.From;
// crossPostArticle.Body = article.Body;
// crossPostArticle.Date = article.Date;
// crossPostArticle.Subject = article.Subject;
// crossPostArticle.ParentNewsgroup = group.GroupName;
// //crossPostArticle.References = article.References;
// crossPostArticle.Newsgroups = article.Newsgroups;
// crossPostArticle.UserAgent = article.UserAgent;
// crossPostArticle.ContentType = article.ContentType;
// crossPostArticle.ContentTransferEncoding = article.ContentTransferEncoding;
// crossPostArticle.XNewsreader = article.XNewsreader;
// // add cross-posted footnote
// //crossPostArticle.Body += "\n\n[X-Posted To: " + article.Newsgroups + "]\n";
// articles.Add(crossPostArticle);
// }
// else
// {
// // indicate posting failure
// //System.Diagnostics.Trace.WriteLine("Posting failed - user [" + clientUsername + "] does not have permission to post to group [" + groupName + "]");
// return PostStatus.FailedAccessDenied;
// }
// } // foreach
// if (articles.Count <= 0)
// {
// return PostStatus.FailedGroupNotFound;
// }
// else
// {
// SaveArticles(clientUsername, articles);
// }
//}
//else
{
// Only one group or a reply:
if (article.Newsgroups.IndexOf(",", StringComparison.InvariantCultureIgnoreCase) > 0)
{
// Cross-Post are not allowed fro answers!
return(GeneralResponses.PostingFailedAccessDeniedMultipost);
}
var group = GetNewsgroupFromCacheOrServer(article.Newsgroups);
if (group != null && group.PostingAllowed)
{
article.ParentNewsgroup = group.GroupName;
articles.Add(article);
SaveArticles(clientUsername, articles);
}
else
{
// indicate posting failure
if (group != null)
{
//System.Diagnostics.Trace.WriteLine("Posting failed - user [" + clientUsername + "] does not have permission to post to group [" + group.GroupName + "]");
//return PostStatus.FailedAccessDenied;
return(GeneralResponses.PostingFailedAccessDenied);
}
//System.Diagnostics.Trace.WriteLine("Posting failed - newsgroup [" + article.Newsgroups + "] could not be found");
//return PostStatus.FailedGroupNotFound;
return(GeneralResponses.PostingFailedGroupNotFound);
}
}
return(GeneralResponses.ArticlePostedOk);
}
catch (Exception exp)
{
//System.Diagnostics.Trace.WriteLine("Error in DataProvider.PostArticle - " + ex.Message + " :: " + ex.StackTrace);
Traces.NntpServerTraceEvent(System.Diagnostics.TraceEventType.Critical, "Error in DataProvider.PostArticle: {0}", Traces.ExceptionToString(exp));
var resp = string.Format("441 posting failed {0}\r\n", NntpServer.GetErrorResponseFromExeption(exp));
//return GeneralResponses.PostingFailed;
return(resp);
}
}
private MimePart[] GetMimeParts()
{
var mimeParts = new ArrayList();
MimePart mimePart = null;
char[] separator = { '\n' };
string line;
var lines = _text.Split(separator);
var i = 0;
var start = false;
var startMimeHeader = false;
var startMimeBody = false;
var mimePartBody = new StringBuilder();
var mimePartCount = 0;
string boundary = "------=_NextPart_";
if (string.IsNullOrEmpty(Boundary) == false)
{
boundary = Boundary.Trim('"', ' ');
}
while (i < lines.Length)
{
// get the next line
line = lines[i].TrimEnd().Replace("\0", string.Empty);
// check for header
if (line == "This is a multi-part message in MIME format.")
{
if (start)
{
throw new Exception("Multiple MIME format headers detected");
}
start = true;
goto NextLine;
}
// new mime part detected
if (line.IndexOf(boundary, StringComparison.InvariantCultureIgnoreCase) >= 0)
{
if (mimePartCount > 0) // not the first part
{
// save the body of the last mime part
if (mimePart == null)
{
throw new ApplicationException("Should never happen...");
}
mimePart.Body = mimePartBody.ToString();
// add the part to the collection
mimeParts.Add(mimePart);
// clear out for next part
mimePartBody = new StringBuilder();
}
// create a new mime part & increment the counter
mimePart = new MimePart();
mimePartCount++;
startMimeHeader = true;
startMimeBody = false;
goto NextLine;
}
// check for end of header
if ((startMimeHeader) && (line.Trim().Length == 0 || line == "\0"))
{
startMimeHeader = false;
startMimeBody = true;
goto NextLine;
}
// copy header property
if (startMimeHeader)
{
int sepPos = line.IndexOf(":");
if (sepPos > 0)
{
var propertyName = line.Substring(0, sepPos);
var propertyValue = line.Substring(sepPos + 1);
mimePart.AddProperty(propertyName.Trim(), propertyValue.Trim());
}
else
{
// multi line header:
var propertyValue = line;
if (mimePart.Properties.Length > 0)
{
mimePart.AppendToLastProperty(propertyValue.Trim());
}
}
//if (line.StartsWith("\t"))
//{
// propertyName = line.Substring(line.IndexOf("\t") + 1, line.IndexOf("=") - 1);
// propertyValue = line.Substring(line.IndexOf("\"") + 1, line.Length - line.IndexOf("\"") - 2);
// mimePart.AddProperty(propertyName.Trim(), propertyValue.Trim());
//}
//else
//{
// propertyName = line.Substring(0, line.IndexOf(":"));
// propertyValue = line.Substring(line.IndexOf(":") + 1, line.Length - line.IndexOf(":") - 1);
// if (propertyValue.Substring(propertyValue.Length - 1, 1) == ";")
// {
// propertyValue = propertyValue.Substring(0, propertyValue.Length - 1);
// }
// mimePart.AddProperty(propertyName.Trim(), propertyValue.Trim());
//}
}
if (startMimeBody)
{
mimePartBody.Append(line + "\n");
}
NextLine:
i++;
}
// commit the last part
if (mimePart != null)
{
mimeParts.Add(mimePart);
}
return((MimePart[])mimeParts.ToArray(typeof(MimePart)));
}