public void RunClient(IPAddress endPoint, int port, int name)//==>TODO#8 Extract into separate class
{
var client = new TcpQbservableClient <string>(endPoint, port);
var query =
(from value in client.Query()
select value);
//==>TODO#8 move code to separate handlers
//Handle messages published by this certain agent
//==>TODO#5 Extract messeges to logger
using (query.Subscribe(
value => {
var messsege = JsonSerializer.Deserialize <TCPMesssege>(value);
Logger.PrintReceivedMessage(_agentId, messsege, name);
SaveAgentPosition(_agentId, messsege.CurrentAgentPosition); //Handle recieved info published by other agents
},
ex => Console.WriteLine("Error In agent #{1} in client #{2}: {0}", ex.Message, _agentId, name),
() => Console.WriteLine("In agent #{0} client #{1} completed", _agentId, name)))
{
Console.WriteLine("Agent #{0} client #{1} started. Waiting for basic service notifications...", _agentId, name);
Console.ReadKey(intercept: true); //DO NOT REMOVE it. leads to ProtocolNegotiationError
}
}
private void OnControlLoaded()
{
var client = new TcpQbservableClient <string>(new IPEndPoint(IPAddress.Loopback, 3205));
var query = from value in client.Query() select value;
this.clientDisposable = query.Subscribe(
value => OnParseMessageAsync(value),
ex => this.Message = ex.Message,
() => this.Message = "Completed");
}
static void Main(string[] args)
{
var client = new TcpQbservableClient <long>(new IPEndPoint(IPAddress.Loopback, 3205));
//thie expression tree filtering will happen server side
//THAT IS AWESOME
IQbservable <string> query =
from value in client.Query()
where value <= 5 || value >= 8
select string.Format("The incoming value has been doubled to {0}", value * 2);
using (query.Subscribe(
value => Console.WriteLine("Client observed: " + value),
ex => Console.WriteLine("Error: {0}", ex.Message),
() => Console.WriteLine("Completed")))
{
Console.ReadKey();
}
}
public void Run()
{
Console.WriteLine();
Console.WriteLine("Feed aggregation client starting...");
var feedAggregatorServiceArgs = new List <FeedServiceArgument>()
{
new FeedServiceArgument()
{
IsAtom = false, Url = new Uri("http://rss.cnn.com/rss/cnn_topstories.rss")
},
new FeedServiceArgument()
{
IsAtom = false, Url = new Uri("http://blogs.msdn.com/b/rxteam/rss.aspx")
},
new FeedServiceArgument()
{
IsAtom = true, Url = new Uri("http://social.msdn.microsoft.com/Forums/en-US/rx/threads?outputAs=atom")
}
};
var client = new TcpQbservableClient <FeedItem>(Program.AdvancedServiceEndPoint, typeof(FeedItem));
IQbservable <FeedItem> query =
(from item in client.Query(feedAggregatorServiceArgs)
where item.PublishDate >= DateTimeOffset.UtcNow.AddHours(-DateTimeOffset.UtcNow.TimeOfDay.TotalHours)
select item)
.Do(value => Console.WriteLine("{0} pushing value: {1}", Assembly.GetEntryAssembly().EntryPoint.DeclaringType.Namespace, value.Title));
using (query.Subscribe(
value => ConsoleTrace.WriteLine(ConsoleColor.Green, "Feed client observed: ({0}) {1}", value.FeedUrl.Host, value.Title),
ex => ConsoleTrace.WriteLine(ConsoleColor.Red, "Feed client error: {0}", ex.Message),
() => ConsoleTrace.WriteLine(ConsoleColor.DarkCyan, "Feed client completed")))
{
Console.WriteLine();
Console.WriteLine("Feed client started. Waiting for advanced service notifications...");
Console.WriteLine();
Console.WriteLine("(Press any key to continue)");
Console.WriteLine();
Console.ReadKey(intercept: true);
}
}
public void Run()
{
Console.WriteLine();
Console.WriteLine("Advanced client starting...");
Console.WriteLine();
var suffix = ")";
var localObj = new LocalObject();
var localTransferableObj = new SharedLibrary.TransferableObject(100);
var client = new TcpQbservableClient <long>(Program.BasicServiceEndPoint, typeof(SharedLibrary.TransferableObject));
IQbservable <string> query =
(from value in client.Query()
let r = new TransferableObject(42)
let numberBase = new { Remote = r.Value, Local = localTransferableObj.Value }
from n in Observable.Range(1, 5)
let number = (value + 1) * n
where number % 2 == 0
let result = numberBase.Remote + numberBase.Local + number
let prefix = LocalStaticMethod(localObj.LocalInstanceMethod()) + localObj.LocalInstanceProperty
let list = (from i in LocalIterator()
select i * 2)
.Aggregate("", (acc, cur) => acc + cur + ",", acc => acc.Substring(0, acc.Length - 1))
select prefix + result + ", [" + list + "]" + suffix)
.Take(16)
.Do(value => Console.WriteLine("{0} pushing value: {1}", Assembly.GetEntryAssembly().EntryPoint.DeclaringType.Namespace, value));
using (query.Subscribe(
value => ConsoleTrace.WriteLine(ConsoleColor.Green, "Advanced client observed: {0}", value),
ex => ConsoleTrace.WriteLine(ConsoleColor.Red, "Advanced client error: {0}", ex.Message),
() => ConsoleTrace.WriteLine(ConsoleColor.DarkCyan, "Advanced client completed")))
{
Console.WriteLine();
Console.WriteLine("Advanced client started. Waiting for basic service notifications...");
Console.WriteLine();
Console.WriteLine("(Press any key to continue)");
Console.WriteLine();
Console.ReadKey(intercept: true);
}
}
public void Run()
{
Console.WriteLine();
Console.WriteLine("Duplex client starting...");
var trace = new TraceSource("Custom", SourceLevels.All);
trace.Listeners.Add(new AbbreviatedConsoleTraceListener());
var suffix = ")";
var localObj = new LocalObject();
var localObservable = Observable
.Interval(TimeSpan.FromSeconds(2))
.Take(2)
.Do(value => trace.TraceInformation("localObservable: {0}", value));
var client = new TcpQbservableClient <long>(Program.BasicServiceEndPoint, new DuplexLocalEvaluator());
IQbservable <string> query =
(from serviceValue in client.Query()
let prefix = LocalStaticMethod(localObj.LocalInstanceMethod()) + localObj.LocalInstanceProperty
from clientValue in localObservable
.Do(value => Console.WriteLine("{0} received value: {1}", Assembly.GetEntryAssembly().EntryPoint.DeclaringType.Namespace, value))
from random in LocalIterator()
select prefix + clientValue + "/" + serviceValue + ", R=" + random + suffix)
.Take(21)
.Do(value => Console.WriteLine("{0} pushing value: {1}", Assembly.GetEntryAssembly().EntryPoint.DeclaringType.Namespace, value));
using (query.Subscribe(
value => ConsoleTrace.WriteLine(ConsoleColor.Green, "Duplex client observed: {0}", value),
ex => ConsoleTrace.WriteLine(ConsoleColor.Red, "Duplex client error: {0}", ex.Message),
() => ConsoleTrace.WriteLine(ConsoleColor.DarkCyan, "Duplex client completed")))
{
Console.WriteLine();
Console.WriteLine("Duplex client started. Waiting for basic service notifications...");
Console.WriteLine();
Console.WriteLine("(Press any key to continue)");
Console.WriteLine();
Console.ReadKey(intercept: true);
}
}
public void Run()
{
var client = new TcpQbservableClient <ChatServiceHooks>(Program.ChatServiceEndPoint);
Console.WriteLine();
Console.Write("Enter your user name> ");
string userName = Console.ReadLine();
Console.Write("Enter names to ignore separated by commas> ");
var userNamesToIgnore = Console.ReadLine().Split(',').Select(name => name.Trim() + ' ');
var myMessages = new Subject <string>();
IObservable <string> outgoingMessages = myMessages;
IQbservable <string> query =
(from hooks in client.Query(userName)
.Do(hooks => outgoingMessages.Subscribe(hooks.IncomingMessages))
from message in hooks.OutgoingMessages
where !userNamesToIgnore.Any(message.StartsWith)
select message);
using (query.Subscribe(
message => ConsoleTrace.WriteLine(ConsoleColor.Green, message),
ex => ConsoleTrace.WriteLine(ConsoleColor.Red, "Chat client error: " + ex.Message),
() => ConsoleTrace.WriteLine(ConsoleColor.DarkCyan, "Chat client completed")))
{
Console.WriteLine();
Console.WriteLine("Chat client started. You may begin entering messages...");
Console.WriteLine();
Console.WriteLine("(Enter a blank line to stop)");
Console.WriteLine();
string message;
while ((message = Console.ReadLine()).Length > 0)
{
myMessages.OnNext(message);
}
}
}
public void Run()
{
var client = new TcpQbservableClient <long>(Program.TimerServiceEndPoint);
IQbservable <int> query =
(from value in client.Query(TimeSpan.FromSeconds(1))
from page in new WebClient().DownloadStringTaskAsync(new Uri("http://blogs.msdn.com/b/rxteam"))
select page.Length)
.Do(result => Console.WriteLine("Where am I? Result = " + result));
using (query.Subscribe(
value => ConsoleTrace.WriteLine(ConsoleColor.Green, "Timer client observed: " + value),
ex => ConsoleTrace.WriteLine(ConsoleColor.Red, "Timer client error: " + ex.Message),
() => ConsoleTrace.WriteLine(ConsoleColor.DarkCyan, "Timer client completed")))
{
Console.WriteLine();
Console.WriteLine("Timer client started. Waiting for timer service notification...");
Console.WriteLine();
Console.WriteLine("(Press any key to continue)");
Console.WriteLine();
Console.ReadKey(intercept: true);
}
}
public void Run()
{
var client = new TcpQbservableClient <long>(Program.BasicServiceEndPoint);
var query =
(from value in client.Query()
where value % 2 == 0
select value)
.Do(value => Console.WriteLine("{0} pushing value: {1}", Assembly.GetEntryAssembly().EntryPoint.DeclaringType.Namespace, value));
using (query.Subscribe(
value => ConsoleTrace.WriteLine(ConsoleColor.Green, "Basic client observed: {0}", value),
ex => ConsoleTrace.WriteLine(ConsoleColor.Red, "Basic client error: {0}", ex.Message),
() => ConsoleTrace.WriteLine(ConsoleColor.DarkCyan, "Basic client completed")))
{
Console.WriteLine();
Console.WriteLine("Basic client started. Waiting for basic service notifications...");
Console.WriteLine();
Console.WriteLine("(Press any key to continue)");
Console.WriteLine();
Console.ReadKey(intercept: true);
}
}
private void Run(IPEndPoint serviceEndPoint)
{
var client = new TcpQbservableClient <int>(serviceEndPoint, typeof(MessageBox));
// This query is allowed in both service scenarios
IQbservable <string> query1 = client.Query()
.Take(1)
.Select(_ => "I'm allowed to get my permissions...\r\n" + AppDomain.CurrentDomain.PermissionSet.ToString());
/* The sandboxed service does not prevent Console.WriteLine because that API doesn't demand any permissions.
* This shows why setting AllowExpressionsUnrestricted to true is a bad idea, unless you trust all clients.
*/
IQbservable <string> query2 = client.Query()
.Take(1)
.Do(_ => Console.WriteLine("Hello from malicious client!"))
.Select(_ => "Malicious message sent successfully.");
/* The default expression limiter does not prevent Environment.CurrentDirectory from being read because it's a property.
* This shows why hosting services in a sandboxed AppDomain is a good idea, unless you trust all clients.
*/
IQbservable <string> query3 = client.Query()
.Take(1)
.Select(_ => Environment.CurrentDirectory);
// This query is prevented in both service scenarios
IQbservable <string> query4 = client.Query()
.Select(_ => MessageBox.Show("Hello from malicious client!").ToString());
// This query is prevented in both service scenarios
IQbservable <string> query5 = client.Query()
.Select(_ => Environment.GetEnvironmentVariable("Temp", EnvironmentVariableTarget.Machine));
// This query is prevented in both service scenarios
IQbservable <string> query6 = client.Query()
.Select(_ => System.IO.File.Create("c:\\malicious.exe").Length.ToString());
// This query is prevented in both service scenarios
IQbservable <string> query7 = client.Query()
.Select(_ => AppDomain.CreateDomain(
"Malicious Domain",
null,
new AppDomainSetup()
{
ApplicationBase = "C:\\Windows\\Temp\\"
},
new PermissionSet(PermissionState.Unrestricted))
.FriendlyName);
// This query is prevented in both service scenarios
IQbservable <string> query8 = client.Query()
.Select(_ => System.Reflection.Assembly.GetExecutingAssembly().CodeBase);
// This query is prevented in both service scenarios
IQbservable <string> query9 = client.Query()
.Do(_ => new PermissionSet(PermissionState.Unrestricted).Assert())
.Select(_ => string.Empty);
Func <int, IObserver <string> > createObserver = queryNumber => Observer.Create <string>(
value => ConsoleTrace.WriteLine(ConsoleColor.Green, "Malicious query #{0} observed: {1}", queryNumber, value),
ex => ConsoleTrace.WriteLine(ConsoleColor.Red, "Malicious query #{0} error: {1}", queryNumber, ex.Message),
() => ConsoleTrace.WriteLine(ConsoleColor.DarkCyan, "Malicious query #{0} completed", queryNumber));
using (Observable.OnErrorResumeNext(
query1.AsObservable().Do(createObserver(1)),
query2.AsObservable().Do(createObserver(2)),
query3.AsObservable().Do(createObserver(3)),
query4.AsObservable().Do(createObserver(4)),
query5.AsObservable().Do(createObserver(5)),
query6.AsObservable().Do(createObserver(6)),
query7.AsObservable().Do(createObserver(7)),
query8.AsObservable().Do(createObserver(8)),
query9.AsObservable().Do(createObserver(9)))
.Subscribe(_ => { }, ex => { }, () => Console.WriteLine("All queries terminated. Press any key to continue...")))
{
Console.WriteLine();
Console.WriteLine("Malicious client started. Waiting for query terminations...");
Console.WriteLine();
Console.WriteLine("(Press any key to cancel)");
Console.WriteLine();
Console.ReadKey(intercept: true);
}
IQbservable <int> safeQuery =
from value in client.Query()
where value > 0
select value * 10;
using (safeQuery.Subscribe(
value => ConsoleTrace.WriteLine(ConsoleColor.Green, "Safe query observed: " + value),
ex => ConsoleTrace.WriteLine(ConsoleColor.Red, "Safe query error: " + ex.Message),
() => ConsoleTrace.WriteLine(ConsoleColor.DarkCyan, "Safe query completed")))
{
Console.WriteLine();
Console.WriteLine("Waiting for service notifications...");
Console.WriteLine();
Console.WriteLine("(Press any key to continue)");
Console.WriteLine();
Console.ReadKey(intercept: true);
}
}
