private static async Task<NntpClient> ConnectAsync(Server server)
{
// connect to nntp server
var client = new NntpClient(new NntpConnection());
//var client = new NntpClient(new Usenet.Nntp.Experimental.NntpConnection());
if (!await client.ConnectAsync(server.Hostname, server.Port, server.UseSsl))
{
Console.WriteLine("Failed to connect.");
return null;
}
// authenticate
if (!server.NeedsAuthentication || Authenticate(client, server.Username, server.Password))
{
return client;
}
Console.WriteLine("Login failed, bye.");
client.Quit();
return null;
}
static void Main(string[] args)
{
var host = args.Length > 0 ? args[0] : "news.fysh.org";
Console.WriteLine("Hello World!");
var cts = new CancellationTokenSource();
var client = new NntpClient();
try
{
Console.WriteLine($"Connecting to {host}...");
var connectTask = client.ConnectAsync(host).Result;
if (connectTask.IsCommandError || connectTask.IsServerError)
{
// Following a 400 or 502 response, the server MUST immediately close the connection.
var quitAbortiveResult = client.DisconnectAsync().Result;
Console.Out.WriteLine($"Closed connection: {quitAbortiveResult}");
return;
}
Console.WriteLine($"Connected to {host}");
Console.WriteLine($"\r\nRetrieving server capabilities");
var caps = client.GetCapabilitiesAsync(cts.Token).Result;
foreach (var cap in caps)
{
Console.WriteLine($"\t{cap}");
}
var sasl = client.AuthenticateSaslPlainAsync("john", "doe", cts.Token).Result;
var date = client.DateAsync(cts.Token).Result;
Console.WriteLine($"Server date: {date.DateTime}");
var newsgroups = client.GetNewsgroupsListAsync(cts.Token).Result;
Console.WriteLine($"\r\nGroups count={newsgroups.Count}");
foreach (var ng in newsgroups)
{
Console.WriteLine($"\t{ng}");
}
Console.WriteLine($"\r\nRetrieving news...");
foreach (var ng in newsgroups)
{
Console.WriteLine($"\tGroup summary for {ng}");
var group = client.GetGroupAsync(ng, cts.Token).Result;
Console.WriteLine($"\t\tEstimated article count: {group.EstimatedArticleCount}");
Console.WriteLine($"\t\tLow watermark: {group.LowWatermark}");
Console.WriteLine($"\t\tHigh watermark: {group.HighWatermark}");
if (group.HighWatermark == group.LowWatermark - 1)
{
Console.WriteLine("\t\t--- EMPTY GROUP WITH NO ARTICLES ---");
}
else
{
var groupList = client.GetGroupListAsync(ng, null, null, cts.Token).Result;
Console.WriteLine($"\t\tLISTGROUP also called low {groupList.LowWatermark}~={group.LowWatermark}");
Console.WriteLine($"\tNews for {ng}");
var overResponse = client.OverAsync(group.LowWatermark, group.HighWatermark, cts.Token).Result;
Console.Write($"\t\tArticle count={overResponse.Count}");
foreach (var over in overResponse.Take(2))
{
Console.WriteLine($"\t\t#{over.ArticleNumber}: {over.Subject}");
var articleByNumber = client.ArticleAsync(over.ArticleNumber, cts.Token).Result;
Console.WriteLine($"\t\t\t({articleByNumber.Code}) ARTICLE:\r\n{articleByNumber.Lines.Take(50).Aggregate((c, n) => c + "\r\n\t\t\t" + n)}");
var headers = articleByNumber.GetHeaders();
var messageId = articleByNumber.GetHeaderValues("Message-ID").FirstOrDefault();
var articleByMessageId = client.ArticleAsync(messageId, cts.Token).Result;
Console.WriteLine($"\t\t\t\t({articleByMessageId.Code}) ARTICLE: {articleByNumber.Lines.Take(5).Aggregate((c, n) => c + "\r\n\t\t\t" + n)}");
var articleCurrent = client.ArticleAsync(cts.Token).Result;
var messageIdCurrent = articleCurrent.GetHeaderValues("Message-ID").FirstOrDefault();
var stat = client.StatAsync(over.ArticleNumber, cts.Token).Result;
Console.WriteLine($"\t\t\t\tArticle-Num={messageId} ~= Article-Current={messageIdCurrent} ~= Stat={stat.MessageId}");
}
// Test some other commands for groups
var next = client.LastAsync(cts.Token).Result;
Console.WriteLine($"\t\tNEXT ({next.Code}) article={next.ArticleNumber}, messageId={next.MessageId}");
var last = client.LastAsync(cts.Token).Result;
Console.WriteLine($"\t\tLAST ({last.Code}) article={last.ArticleNumber}, messageId={last.MessageId}");
}
}
// Test some other commands globally
{
var newGroups = client.NewGroupsAsync(DateTime.Now.AddYears(-30), cts.Token).Result;
Console.WriteLine($"\r\nChecking for new groups in the past 30 years...");
foreach (var ng in newGroups.Groups.Take(20))
{
Console.WriteLine($"\t{ng.Group} {ng.LowWatermark}-{ng.HighWatermark} {ng.Status}");
}
var newNews = client.NewNewsAsync("*", DateTime.Now.AddYears(-30), cts.Token).Result;
Console.WriteLine($"\r\nChecking for new messages in the past 30 years...");
foreach (var msg in newNews.MessageIds.Take(20))
{
Console.WriteLine($"\t{msg}");
}
var activeGroups = client.ListActiveAsync(cts.Token).Result;
Console.WriteLine($"\r\nLIST ACTIVE Groups count={activeGroups.Groups.Count}");
var activeTimesGroups = client.ListActiveTimesAsync(cts.Token).Result;
Console.WriteLine($"\r\nLIST ACTIVE.TIMES Groups count={activeGroups.Groups.Count}");
var newsgroupsList = client.ListNewsgroupsAsync(cts.Token).Result;
Console.WriteLine($"\r\nLIST NEWSGROUPS Groups count={newsgroupsList.Groups.Count}");
}
}
catch (ArgumentException aex)
{
Console.Error.WriteLine($"Caught ArgumentException: {aex.Message}\r\n{aex}");
return;
}
catch (AggregateException agg)
{
Console.Error.WriteLine($"Caught AggregateException: {agg.Message}");
foreach (var ex in agg.InnerExceptions)
{
Console.Error.WriteLine($"...InnerException: {ex.Message}: {ex}");
}
return;
}
var quitResponse = client.DisconnectAsync().Result;
if (quitResponse == null)
{
Console.Out.WriteLine($"Connection is already closed");
}
else
{
Console.Out.WriteLine($"Closed connection: {quitResponse}");
}
}