private void IHave(string argsText)
{
/* Rfc 977 3.4.1
IHAVE <messageid>
Responses:
235 article transferred ok
335 send article to be transferred. End with <CR-LF>.<CR-LF>
435 article not wanted - do not send it
436 transfer failed - try again later
437 article rejected - do not try again
The IHAVE command informs the server that the client has an article
whose id is <messageid>. If the server desires a copy of that
article, it will return a response instructing the client to send the
entire article. If the server does not want the article (if, for
example, the server already has a copy of it), a response indicating
that the article is not wanted will be returned.
If transmission of the article is requested, the client should send
the entire article, including header and body, in the manner
specified for text transmission from the server. A response code
indicating success or failure of the transferral of the article will
be returned.
This function differs from the POST command in that it is intended
for use in transferring already-posted articles between hosts.
Normally it will not be used when the client is a personal
newsreading program. In particular, this function will invoke the
server's news posting program with the appropriate settings (flags,
options, etc) to indicate that the forthcoming article is being
forwarded from another host.
The server may, however, elect not to post or forward the article if
after further examination of the article it deems it inappropriate to
do so. The 436 or 437 error codes may be returned as appropriate to
the situation.
Reasons for such subsequent rejection of an article may include such
problems as inappropriate newsgroups or distributions, disk space
limitations, article lengths, garbled headers, and the like. These
are typically restrictions enforced by the server host's news
software and not necessarily the NNTP server itself.
*/
//must this check in all newsgroups???
if(m_pArticles == null)
{
NNTP_Articles_eArgs args = m_pNNTP_Server.OnGetXOVER(this,this.m_SelectedNewsGroup);
m_pArticles = new NNTP_Articles();
m_pArticles = args.Articles;
}
if(m_pArticles[argsText] == null)
{
SendData("335 send article to be transferred. End with <CR-LF>.<CR-LF>\r\n");
MemoryStream reply = null;
ReadReplyCode replyCode = Core.ReadData(m_pClientSocket,out reply,null,m_pNNTP_Server.MaxMessageSize,m_pNNTP_Server.CommandIdleTimeOut,"\r\n.\r\n",".\r\n");
if(replyCode == ReadReplyCode.Ok)
{
long recivedCount = reply.Length;
//------- Do period handling and raise store event --------//
// If line starts with '.', mail client adds additional '.',
// remove them.
using(MemoryStream msgStream = Core.DoPeriodHandling(reply,false))
{
reply.Close();
// get list of newsgroups to post to
string[] newsgroups = HeaderParser.ParseHeaderFields("Newsgroups:",msgStream.ToArray()).Split(Convert.ToChar(","));
//get all the necessary headers
HeaderParser hp = new HeaderParser(msgStream.ToArray());
string msgId = m_pNNTP_Server.OnStoreArticle(this,msgStream,newsgroups);
string subject = hp.Subject;
string from = hp.From;
string date = hp.MessageDate.ToString("r",System.Globalization.DateTimeFormatInfo.InvariantInfo);
string refs = hp.References;
string lines = hp.Lines;
//Add msg to current article list
if(m_pNNTP_Server.LogCommands)
{
m_pLogWriter.AddEntry("big binary " + recivedCount.ToString() + " bytes" + "",this.SessionID,m_ConnectedIp,"S");
}
SendData("240 Article posted successfully.\r\n");
}
//----------------------------------------------------------//
}
else
{
if(replyCode == ReadReplyCode.LengthExceeded)
{
SendData("441 Requested action aborted: exceeded storage allocation\r\n");
}
else
{
SendData("441 Error message not terminated with '.'\r\n");
}
}
}
else
{
SendData("435 article not wanted - do not send it\r\n");
}
}
private void Stat(string argsText)
{
/* Rfc 977 3.1.2
STAT <message-id> or [nnn]
Responses:
220 n <a> article retrieved - head and body follow
(n = article number, <a> = message-id)
221 n <a> article retrieved - head follows
222 n <a> article retrieved - body follows
223 n <a> article retrieved - request text separately
412 no newsgroup has been selected
420 no current article has been selected
423 no such article number in this group
430 no such article found
The STAT command is similar to the ARTICLE command except that no
text is returned. When selecting by message number within a group,
the STAT command serves to set the current article pointer without
sending text. The returned acknowledgement response will contain the
message-id, which may be of some value. Using the STAT command to
select by message-id is valid but of questionable value, since a
selection by message-id does NOT alter the "current article pointer".
*/
if(argsText == "")
{
argsText = m_CurrentArticle.ToString();
}
else
{
if(NNTP_API.IsNumeric(argsText))
{
m_CurrentArticle = Convert.ToInt32(argsText);
}
}
if(m_SelectedNewsGroup.Length == 0)
{
SendData("412 no newsgroup selected\r\n");
return;
}
string article = m_pNNTP_Server.OnGetArticle(this,argsText);
if(article != "")
{
HeaderParser hp = new HeaderParser(System.Text.Encoding.ASCII.GetBytes(article));
SendData("223 " + argsText + " " + hp.MessageID + " article retrieved\r\n");
}
else
{
SendData("430 no such article found\r\n");
}
}
/// <summary>
/// Gets new article info for newsgroups.
/// </summary>
public void GetNewNews(string groups,DateTime since,NNTP_Articles articles)
{
byte[] fileData = null;
int msgNo = 1;
Hashtable files = new Hashtable();
NNTP_NewsGroups newsgroups = ParseNewsGroups(groups);
foreach(NNTP_NewsGroup group in newsgroups.Newsgroups)
{
string groupPath = group.Name.Replace(".","\\");
string path = m_NNTPStorePath + "groups\\" + groupPath;
if(!Directory.Exists(path)){
Directory.CreateDirectory(path);
AddGroup(group.Name);
}
string[] articls = Directory.GetFiles(path,"*.txt");
foreach(string articl in articls)
{
using(FileStream fs = File.OpenRead(articl))
{
fileData = new byte[fs.Length];
fs.Read(fileData,0,(int)fs.Length);
}
HeaderParser hp = new HeaderParser(fileData);
msgNo = Convert.ToInt32(Path.GetFileNameWithoutExtension(articl).Substring(0,Path.GetFileNameWithoutExtension(articl).IndexOf("_")));
string date = hp.MessageDate.ToString();
if(Convert.ToDateTime(date).CompareTo(since) > 0)
{
articles.Add(hp.MessageID,msgNo,hp.Subject,hp.From,date,hp.References,hp.Lines,fileData.Length.ToString());
}
}
}
}
private void Post()
{
/* Rfc 977 3.10.1
Responses:
240 article posted ok
340 send article to be posted. End with <CR-LF>.<CR-LF>
440 posting not allowed
441 posting failed
If posting is allowed, response code 340 is returned to indicate that
the article to be posted should be sent. Response code 440 indicates
that posting is prohibited for some installation-dependent reason.
If posting is permitted, the article should be presented in the
format specified by RFC850, and should include all required header
lines. After the article's header and body have been completely sent
by the client to the server, a further response code will be returned
to indicate success or failure of the posting attempt.
The text forming the header and body of the message to be posted
should be sent by the client using the conventions for text received
from the news server: A single period (".") on a line indicates the
end of the text, with lines starting with a period in the original
text having that period doubled during transmission.
No attempt shall be made by the server to filter characters, fold or
limit lines, or otherwise process incoming text. It is our intent
that the server just pass the incoming message to be posted to the
server installation's news posting software, which is separate from
this specification. See RFC850 for more details.
Since most installations will want the client news program to allow
the user to prepare his message using some sort of text editor, and
transmit it to the server for posting only after it is composed, the
client program should take note of the herald message that greeted it
when the connection was first established. This message indicates
whether postings from that client are permitted or not, and can be
used to caution the user that his access is read-only if that is the
case. This will prevent the user from wasting a good deal of time
composing a message only to find posting of the message was denied.
The method and determination of which clients and hosts may post is
installation dependent and is not covered by this specification.
Example:
C: POST
S: 340 Continue posting; Period on a line by itself to end
C: (transmits news article in RFC850 format)
C: .
S: 240 Article posted successfully.
*/
SendData("340 Continue posting; Period on a line by itself to end\r\n");
// Read message
MemoryStream reply = null;
ReadReplyCode replyCode = Core.ReadData(m_pClientSocket,out reply,null,m_pNNTP_Server.MaxMessageSize,m_pNNTP_Server.CommandIdleTimeOut,"\r\n.\r\n",".\r\n");
if(replyCode == ReadReplyCode.Ok){
long recivedCount = reply.Length;
//------- Do period handling and raise store event --------//
// If line starts with '.', mail client adds additional '.',
// remove them.
using(MemoryStream msgStream = Core.DoPeriodHandling(reply,false)){
reply.Close();
// get list of newsgroups to post to
string[] newsgroups = HeaderParser.ParseHeaderFields("Newsgroups:",msgStream.ToArray()).Split(Convert.ToChar(","));
//get all the necessary headers
HeaderParser hp = new HeaderParser(msgStream.ToArray());
string msgId = m_pNNTP_Server.OnStoreArticle(this,msgStream,newsgroups);
string subject = hp.Subject;
string from = hp.From;
string date = hp.MessageDate.ToString("r",System.Globalization.DateTimeFormatInfo.InvariantInfo);
string refs = hp.References;
string lines = hp.Lines;
//Add msg to current article list
if(m_pNNTP_Server.LogCommands){
m_pLogWriter.AddEntry("big binary " + recivedCount.ToString() + " bytes" + "",this.SessionID,m_ConnectedIp,"S");
}
SendData("240 Article posted successfully.\r\n");
}
//----------------------------------------------------------//
}
else{
if(replyCode == ReadReplyCode.LengthExceeded){
SendData("441 Requested action aborted: exceeded storage allocation\r\n");
}
else{
SendData("441 Error message not terminated with '.'\r\n");
}
}
}
/// <summary>
/// Gets article info for a newsgroup.
/// </summary>
public void GetArticles(string group,NNTP_Articles articles)
{
byte[] fileData = null;
int msgNo = 1;
Hashtable files = new Hashtable();
group = group.Replace(".","\\");
string path = m_NNTPStorePath + "groups\\" + group;
if(!Directory.Exists(path))
{
Directory.CreateDirectory(path);
AddGroup(group);
}
string[] articls = Directory.GetFiles(path,"*.txt");
foreach(string articl in articls)
{
using(FileStream fs = File.OpenRead(articl))
{
fileData = new byte[fs.Length];
fs.Read(fileData,0,(int)fs.Length);
}
HeaderParser hp = new HeaderParser(fileData);
msgNo = Convert.ToInt32(Path.GetFileNameWithoutExtension(articl).Substring(0,Path.GetFileNameWithoutExtension(articl).IndexOf("_")));
string date = hp.MessageDate.ToString();
articles.Add(msgNo,hp.MessageID,hp.Subject,hp.From,date,hp.References,hp.Lines,fileData.Length.ToString());
}
}
