private string GetArticleBody <T>(T msg)
{
var conn = (msg as Messages.GetArticleBody).Connection;
uint articleId = (msg as Messages.GetArticleBody).ArticleID;
string newsGroup = (msg as Messages.GetArticleBody).NewsGroup;
bool BodyCommandSupported = (bool)conn.SupportedCommands[NNTPMessages.Body];
if (!BodyCommandSupported)
{
throw new Exception(); //TODO:
}
string response = SelectNewsGroup(conn, newsGroup);
LogResponse(response);
Write(conn, NNTPMessages.GetArticleBody(articleId.ToString()));
response = Response(conn, NNTPMessages.GetArticleBody(articleId.ToString()));
LogResponse(response);
if (!NNTPResponseCodes.IsResposeCode(response, NNTPResponseCodes.ArticleRetrievedBodyToFollow))
{
if (response.Length <= 0)
{
throw new Exception();// TODO
}
}
if (NNTPResponseCodes.IsResposeCode(response, NNTPResponseCodes.NoSuchArticleNumberInGroup))
{
throw new Exception(); //TODO:
}
string articleBody = "";
bool storedAuth = conn.Authenticate;
conn.Authenticate = false;
while (true)
{
response = Response(conn, NNTPMessages.GetArticleBody(articleId.ToString()));
if (response == ".\r\n")
{
break;
}
if (response == ".\n")
{
break;
}
//if (article.Length < 1024)
articleBody += response;
}
conn.Authenticate = storedAuth;
return(articleBody);
}
public override bool OnMessageRecieved <T>(T msg)
{
if (msg.GetType() != typeof(Messages.Authenticate))
{
return(false);
}
string authResponse = "";
var conn = (msg as Messages.Authenticate).Connection;
TcpClient connection = conn.Connection;
NetworkStream stream = conn.Stream;
string Username = conn.UserName;
string Password = conn.Password;
System.Text.ASCIIEncoding en = new System.Text.ASCIIEncoding();
if ((null == Username) || (null == Password))
{
return(false);
}
//DO Authetication Here!
bool success = true;
string message = NNTPMessages.GetAuthInfoUser(Username);
var writeBuffer = en.GetBytes(message);
stream.Write(writeBuffer, 0, writeBuffer.Length);
string requiresPassword = Response(conn, message);
//TODO: check the supported commands for the correct command to authenticate with.
authResponse = requiresPassword;
if (NNTPResponseCodes.IsResposeCode(requiresPassword, NNTPResponseCodes.PasswordRequired))
{
message = NNTPMessages.GetAuthInfoPass(Password);
writeBuffer = en.GetBytes(message);
stream.Write(writeBuffer, 0, writeBuffer.Length);
string response = Response(conn, message);
if (NNTPResponseCodes.IsResposeCode(response, NNTPResponseCodes.AuthenticationOK))
{
success = true;
}
if (NNTPResponseCodes.IsResposeCode(response, NNTPResponseCodes.PermissionDenied))
{
throw new Exception(response); //NNTPAuthenticationDeniedException
}
}
return(true);
}
public override bool OnMessageRecieved <T>(T msg)
{
/// The GetNewsgroups method begins by sending a LIST message to the NNTP server.
/// The NNTP server will respond initially with the 215 status-code indicating that it successfully received the LIST message.
/// Then the NNTP server will respond with a series of lines, each representing one forum on the NNTP server.
/// After all the forums are sent, the NNTP server will send one line with a single period, indicating the end of the forum list.
/// The list of forums is returned from the GetNewsgroups method as an ArrayList of strings.
/// From the list of forums, you can select one forum and receive from the GetNews method all the news for that forum.
/// Call GetNews passing the name of the forum to receive the news postings.
if (msg.GetType() != typeof(Messages.ListNewsGroups) &&
msg.GetType() != typeof(Messages.ListNewsGroupsSince))
{
return(false);
}
var conn = (msg as Messages.ListNewsGroups).Connection;
if (msg.GetType() != typeof(Messages.ListNewsGroupsSince))
{
Write(conn, NNTPMessages.ListNewsGroups);
}
else
{
Write(conn, NNTPMessages.ListNewsGroupsSince((msg as Messages.ListNewsGroupsSince).LastCheckedDate));
}
var response = Response(conn, NNTPMessages.ListNewsGroups);
LogResponse(response);
if (response.Substring(0, 3) != NNTPResponseCodes.ListOfNewsGroupsFollows)
{
throw new Exception(); //TODO throw new NntpException(response);
}
var list = GetNewsGroupListFromResponse(conn, NNTPMessages.ListNewsGroups);
return(true);
}
private string SelectNewsGroup(ServerConnection conn, string newsGroup)
{
//Select a group and get article list
if (newsGroup.Equals(conn.CurrentNewsGroup))
{
return(conn.LastNewsGroupSelectionResponse);
}
Write(conn, NNTPMessages.SelectGroup(newsGroup));
string response = Response(conn, NNTPMessages.SelectGroup(newsGroup));
if (response.Substring(0, 3) != NNTPResponseCodes.GroupSelected)
{
throw new Exception(); //TODO throw new NntpException(response);
}
conn.CurrentNewsGroup = new NewsGroup(conn.ServerName, response);
conn.LastNewsGroupSelectionResponse = response;
//TODO update the newsgroup list in conn
return(response);
}
private string GetArticleHead <T>(T msg)
{
bool stillNeedToRetrievearticleLines = true;
var conn = (msg as Messages.GetArticleHead).Connection;
uint articleId = (msg as Messages.GetArticleHead).ArticleID;
string newsGroup = (msg as Messages.GetArticleHead).NewsGroup;
bool HeadCommandSupported = (bool)conn.SupportedCommands[NNTPMessages.Head];
if (!HeadCommandSupported)
{
throw new Exception(); //TODO:
}
string response = SelectNewsGroup(conn, newsGroup);
LogResponse(response);
string msgString = NNTPMessages.GetArticleHead(articleId.ToString());
Write(conn, msgString);
response = Response(conn, msgString);
VerifyResponse(response);
if (response.Substring(0, 3) == NNTPResponseCodes.NoSuchArticleNumberInGroup)
{
throw new Exception(); //TODO:
}
if ((response.Substring(0, 3) != NNTPResponseCodes.ArticleRetrievedHeadAndBodyToFollow) &&
(response.Substring(0, 3) != NNTPResponseCodes.ArticleRetrievedHeadToFollow))
{
throw new Exception(); // TODO throw new NntpException(response);
}
bool storedAuth = conn.Authenticate;
conn.Authenticate = false;
uint linesInArticle = 0;
string article = String.Empty;
while (true)
{
response = Response(conn, msgString);
if (response == ".\r\n")
{
break;
}
if (response == ".\n")
{
break;
}
//see how many lines the article has to get body later.
if ((HeadCommandSupported) && (stillNeedToRetrievearticleLines) && (response.Contains("Lines:")))
{
string articleLines = response.Split(":".ToCharArray())[1];
linesInArticle = Convert.ToUInt32(articleLines.Trim());
stillNeedToRetrievearticleLines = false;
}
article += response;
}
LogResponse(article);
conn.Authenticate = storedAuth;
return(article);
}
private string GetWholeArticle <T>(T msg)
{
var conn = (msg as Messages.GetArticle).Connection;
uint articleId = (msg as Messages.GetArticle).ArticleID;
string newsGroup = (msg as Messages.GetArticle).NewsGroup;
bool ArticleCommandSupported = (bool)conn.SupportedCommands[NNTPMessages.Article];
if (!ArticleCommandSupported)
{
//TODO: use the article head and body command here:
throw new NotImplementedException();
}
string response = SelectNewsGroup(conn, newsGroup);
LogResponse(response);
Write(conn, NNTPMessages.GetArticle(articleId.ToString()));
response = Response(conn, NNTPMessages.GetArticle(articleId.ToString()));
VerifyResponse(response);
if (response.Substring(0, 3) == NNTPResponseCodes.NoSuchArticleNumberInGroup)
{
throw new Exception(); //TODO
}
if ((response.Substring(0, 3) != NNTPResponseCodes.ArticleRetrievedHeadAndBodyToFollow) &&
(response.Substring(0, 3) != NNTPResponseCodes.ArticleRetrievedHeadToFollow))
{
throw new Exception(); //TODO throw new NntpException(response);
}
//NOTE: we add the ServerArticleIndex so that we may add it to the newsgroup post class later when we parse the text.
string article = String.Empty;
bool storedAuth = conn.Authenticate;
conn.Authenticate = false;
while (true)
{
response = Response(conn, NNTPMessages.GetArticle(articleId.ToString()));
if (response == ".\r\n")
{
break;
}
if (response == ".\n")
{
break;
}
//if (article.Length < 1024)
article += response;
}
conn.Authenticate = storedAuth;
return(article);
}
private List <uint> GetNewArticleIds <T>(T msg)
{
var conn = (msg as Messages.GetNewArticleIds).Connection;
DateTime newArticlesSince = (msg as Messages.GetNewArticleIds).NewArticlesSince;
string newsGroup = (msg as Messages.GetNewArticleIds).NewsGroup;
bool NewNewsCommandSupported = (bool)conn.SupportedCommands[NNTPMessages.NewNews];
if (!NewNewsCommandSupported)
{
//Note: this wil return the highest message index
//conn.CurrentNewsGroup.StopIndex;
conn.CurrentNewsGroup = null;
string response = SelectNewsGroup(conn, newsGroup);
LogResponse(response);
throw new NotImplementedException(); //TODO we need to parse the stop index before query and figure out new ids.
}
else
{
string response;
Write(conn, NNTPMessages.GetNewArticles(newsGroup, newArticlesSince));
response = Response(conn, NNTPMessages.GetNewArticles(newsGroup, newArticlesSince));
//Handle the NEWNEWS command not being supported.
if ((response.Contains("NEWNEWS") && (response.Substring(0, 3) == NNTPResponseCodes.PermissionDenied)) ||
(response.Substring(0, 3) == NNTPResponseCodes.CommandNotRecognized))
{
conn.SupportedCommands[NNTPMessages.NewsGroups] = false;
throw new Exception(); //TODO
}
if (response.Substring(0, 3) != NNTPResponseCodes.ListOfNewNewsgroupsFollows)
{
throw new Exception(); //TODO throw new NntpException(response);
}
bool storedAuth = conn.Authenticate;
conn.Authenticate = false;
List <uint> messageIds = new List <uint>();
//TODO fix this infinite loop.
while (true)
{
response = Response(conn, NNTPMessages.GetNewArticles(newsGroup, newArticlesSince));
if (response == ".\r\n")
{
break;
}
if (response == ".\n")
{
break;
}
uint articleID = Convert.ToUInt32(response);
messageIds.Add(articleID);
}
conn.Authenticate = storedAuth;
return(messageIds);
}
}
