public static ListenerTask Create(ListenerContext context, ConnectionState state,
Func <Task> start, Func <ConnectionState> continuation)
{
Func <Task <object> > func = async() => { await start().ConfigureAwait(false); return(null); };
return(new ListenerTask <object> (context, state, func, r => continuation()));
}
internal void AssignContext(ListenerContext context)
{
hasInstrumentation = true;
AssignedContext = context;
context.AssignContext(this);
contextTask.TrySetResult(context);
}
protected override void Close()
{
if (targetContext != null)
{
targetContext.Dispose();
targetContext = null;
}
base.Close();
}
internal async Task <HttpResponse> HandleRequest(
TestContext ctx, ListenerContext context, HttpConnection connection,
HttpRequest request, CancellationToken cancellationToken)
{
var me = $"{ME} HANDLE REQUEST";
ctx.LogDebug(2, $"{me} {connection.ME} {request}");
OnInit();
HttpResponse response;
try {
cancellationToken.ThrowIfCancellationRequested();
if (!Operation.HasAnyFlags(HttpOperationFlags.DontReadRequestBody))
{
await request.Read(ctx, cancellationToken).ConfigureAwait(false);
ctx.LogDebug(2, $"{me} REQUEST FULLY READ");
}
else
{
await request.ReadHeaders(ctx, cancellationToken).ConfigureAwait(false);
ctx.LogDebug(2, $"{me} REQUEST HEADERS READ");
}
response = await Handler.HandleRequest(
ctx, Operation, connection, request, cancellationToken).ConfigureAwait(false);
ctx.LogDebug(2, $"{me} HANDLE REQUEST DONE: {response}");
} catch (OperationCanceledException) {
OnCanceled();
throw;
} catch (Exception ex) {
OnError(ex);
throw;
}
if (response.Redirect == null)
{
OnFinished();
return(response);
}
response.Redirect.parentOperation = this;
return(response);
}
internal ListenerOperation Redirect(ListenerContext newContext)
{
if (State == ConnectionState.NeedContextForRedirect)
{
redirectContext = newContext;
State = ConnectionState.RequestComplete;
return(currentResponse.Redirect);
}
if (State == ConnectionState.CannotReuseConnection)
{
State = ConnectionState.Closed;
return(assignedOperation);
}
throw new InvalidOperationException();
}
public ListenerContext ReuseConnection()
{
disposed = true;
var oldConnection = Interlocked.Exchange(ref connection, null);
if (oldConnection == null)
{
throw new InvalidOperationException();
}
var newContext = new ListenerContext(Listener, oldConnection, true)
{
State = Listener.UsingInstrumentation ? ConnectionState.WaitingForContext : ConnectionState.WaitingForRequest
};
assignedOperation = null;
currentOperation = null;
State = ConnectionState.Closed;
return(newContext);
}
internal ListenerOperation GetOperation(ListenerContext context, HttpRequest request)
{
ListenerOperation operation;
lock (this) {
var me = $"{nameof (GetOperation)}({context.Connection.ME})";
Debug($"{me} {request.Method} {request.Path} {request.Protocol}");
if (!registry.ContainsKey(request.Path))
{
Debug($"{me} INVALID PATH: {request.Path}!");
return(null);
}
operation = registry[request.Path];
registry.Remove(request.Path);
Server.BumpRequestCount();
}
ParentListener?.UnregisterOperation(operation);
return(operation);
}
public async Task <Response> RunWithContext(TestContext ctx, ListenerOperation operation, Request request,
ClientFunc clientFunc, CancellationToken cancellationToken)
{
var me = $"{ME}({operation.Operation.ME}) RUN WITH CONTEXT";
ListenerContext context = null;
ListenerContext targetContext = null;
var reusing = !operation.Operation.HasAnyFlags(HttpOperationFlags.DontReuseConnection);
var delayedContext = operation.Operation.HasAnyFlags(HttpOperationFlags.DelayedListenerContext);
/*
* When using HttpOperationFlags.DelayedListenerContext, then we call the `clientFunc` before we
* actually start listening.
*/
if (UsingInstrumentation && !delayedContext)
{
context = await FindContext(ctx, operation, reusing);
reusing = context.ReusingConnection;
ctx.LogDebug(2, $"{me} - CREATE CONTEXT: {reusing} {context.ME}");
await context.ServerStartTask.ConfigureAwait(false);
ctx.LogDebug(2, $"{me} - CREATE CONTEXT #1: {reusing} {context.ME}");
}
if (TargetListener?.UsingInstrumentation ?? false)
{
targetContext = await TargetListener.FindContext(ctx, operation.TargetOperation, false);
ctx.LogDebug(2, $"{me} - CREATE TARGET CONTEXT: {reusing} {targetContext.ME}");
try {
await targetContext.ServerStartTask.ConfigureAwait(false);
} catch {
context?.Dispose();
throw;
}
}
var clientTask = clientFunc(ctx, request, cancellationToken);
var serverInitTask = operation.ServerInitTask;
var serverFinishedTask = operation.ServerFinishedTask;
ExceptionDispatchInfo throwMe = null;
bool initDone = false, serverDone = false, clientDone = false;
while (!initDone || !serverDone || !clientDone)
{
ctx.LogDebug(2, $"{me} LOOP: init={initDone} server={serverDone} client={clientDone}");
if (clientDone)
{
if (operation.Operation.HasAnyFlags(
HttpOperationFlags.AbortAfterClientExits, HttpOperationFlags.ServerAbortsHandshake,
HttpOperationFlags.ClientAbortsHandshake))
{
ctx.LogDebug(2, $"{me} - ABORTING");
break;
}
if (!initDone)
{
ctx.LogDebug(2, $"{me} - ERROR: {clientTask.Result}");
throwMe = ExceptionDispatchInfo.Capture(new ConnectionException(
$"{me} client exited before server accepted connection."));
break;
}
}
var tasks = new List <Task> ();
if (!initDone)
{
tasks.Add(serverInitTask);
}
if (!serverDone)
{
tasks.Add(serverFinishedTask);
}
if (!clientDone)
{
tasks.Add(clientTask);
}
var finished = await Task.WhenAny(tasks).ConfigureAwait(false);
string which;
if (finished == serverInitTask)
{
which = "init";
initDone = true;
}
else if (finished == serverFinishedTask)
{
which = "server";
serverDone = true;
}
else if (finished == clientTask)
{
which = "client";
clientDone = true;
}
else
{
throwMe = ExceptionDispatchInfo.Capture(new InvalidOperationException());
break;
}
ctx.LogDebug(2, $"{me} #4: {which} exited - {finished.Status}");
if (finished.Status == TaskStatus.Faulted || finished.Status == TaskStatus.Canceled)
{
if (operation.Operation.HasAnyFlags(HttpOperationFlags.ExpectServerException) &&
(finished == serverFinishedTask || finished == serverInitTask))
{
ctx.LogDebug(2, $"{me} EXPECTED EXCEPTION {finished.Exception.GetType ()}");
}
else if (finished.Status == TaskStatus.Canceled)
{
ctx.LogDebug(2, $"{me} CANCELED");
throwMe = ExceptionDispatchInfo.Capture(new OperationCanceledException());
break;
}
else
{
ctx.LogDebug(2, $"{me} FAILED: {finished.Exception.Message}");
throwMe = ExceptionDispatchInfo.Capture(finished.Exception);
break;
}
}
}
if (throwMe != null)
{
ctx.LogDebug(2, $"{me} THROWING {throwMe.SourceException.Message}");
lock (this) {
operation.OnError(throwMe.SourceException);
if (context != null)
{
context.Dispose();
}
if (targetContext != null)
{
targetContext.Dispose();
}
mainLoopEvent.Set();
}
throwMe.Throw();
}
return(clientTask.Result);
}
void RunScheduler()
{
do
{
Cleanup();
if (!UsingInstrumentation)
{
CreateConnections();
}
} while (!StartTasks());
void Cleanup()
{
var iter = connections.First;
while (iter != null)
{
var node = iter;
var context = node.Value;
iter = iter.Next;
if (context.State == ConnectionState.Closed)
{
connections.Remove(node);
context.Dispose();
}
else if (context.State == ConnectionState.ReuseConnection)
{
connections.Remove(node);
var newContext = context.ReuseConnection();
connections.AddLast(newContext);
}
}
}
void CreateConnections()
{
while (connections.Count < requestParallelConnections)
{
Debug($"RUN SCHEDULER: {connections.Count}");
var connection = Backend.CreateConnection();
connections.AddLast(new ListenerContext(this, connection, false));
Debug($"RUN SCHEDULER #1: {connection.ME}");
}
}
bool StartTasks()
{
var listening = false;
ListenerContext listeningContext = null;
ListenerContext redirectContext = null;
ListenerContext idleContext = null;
var me = $"RUN SCHEDULER - TASKS";
Debug($"{me}");
var idx = 0;
var iter = connections.First;
while (iter != null)
{
var node = iter;
var context = node.Value;
iter = iter.Next;
Debug($"{me} ({++idx}/{connections.Count}): {context.State} {context.CurrentTask != null} {context.ME}");
if (!listening && context.State == ConnectionState.Listening)
{
listening = true;
}
if (false && UsingInstrumentation && listening && context.State == ConnectionState.Listening)
{
continue;
}
if (context.CurrentTask != null)
{
continue;
}
switch (context.State)
{
case ConnectionState.Idle:
case ConnectionState.WaitingForContext:
if (!UsingInstrumentation)
{
throw new InvalidOperationException();
}
if (idleContext == null && listeningContext == null)
{
idleContext = context;
}
continue;
case ConnectionState.NeedContextForRedirect:
case ConnectionState.CannotReuseConnection:
if (redirectContext == null)
{
redirectContext = context;
}
continue;
case ConnectionState.Listening:
if (idleContext == null && listeningContext == null)
{
listeningContext = context;
}
break;
}
var task = context.MainLoopListenerTask(TestContext, cts.Token);
listenerTasks.AddLast(task);
if (false && context.State == ConnectionState.Listening && !listening)
{
listeningContext = context;
listening = true;
}
}
Debug($"{me} DONE: instrumentation={currentOperation?.ID} listening={listening} " +
$"redirect={redirectContext != null} idleContext={idleContext != null} " +
$"listeningContext={listeningContext != null} " +
$"assigned={currentOperation?.AssignedContext != null}");
var availableContext = idleContext ?? listeningContext;
if (currentOperation != null)
{
if (currentOperation.AssignedContext != null)
{
return(true);
}
var operation = currentOperation.Operation;
var forceNewCnc = operation.HasAnyFlags(HttpOperationFlags.ForceNewConnection);
if (listening && !forceNewCnc)
{
return(true);
}
if (availableContext == null || forceNewCnc)
{
var connection = Backend.CreateConnection();
availableContext = new ListenerContext(this, connection, false);
connections.AddLast(availableContext);
}
Debug($"{me} ASSIGN CONTEXT: {availableContext.ME} {currentOperation.ME}");
currentOperation.AssignContext(availableContext);
return(false);
}
if (redirectContext == null)
{
return(true);
}
if (availableContext == null)
{
var connection = Backend.CreateConnection();
availableContext = new ListenerContext(this, connection, false);
connections.AddLast(availableContext);
}
currentOperation = redirectContext.Redirect(availableContext);
currentOperation.AssignContext(availableContext);
Debug($"{me} DONE #1: {availableContext.ME} {currentOperation?.ME}");
return(false);
}
}
public static ListenerTask Create <T, U> (ListenerContext context, ConnectionState state,
Func <Task <(T, U)> > start, Func <T, U, ConnectionState> continuation)
public static ListenerTask Create <T> (ListenerContext context, ConnectionState state,
Func <Task <T> > start, Func <T, ConnectionState> continuation)
{
return(new ListenerTask <T> (context, state, start, continuation));
}