protected virtual async ValueTask <TContext> InvokingAsync(CancellationToken cancellation)
{
using var scope = ServiceScopeFactory.CreateScope();
var context = new TContext
{
ServiceProvider = scope.ServiceProvider,
CancellationToken = cancellation
};
await Delegate.Invoke(context);
return(context);
}
public async Task InvokeAsync(PipelineContext context, PipelineDelegate next)
{
var concurrentPipelineCount = ConcurrentPipelineCount < 1
? 1 : ConcurrentPipelineCount;
foreach (var requestAndPipeline in _requestAndPipeline)
{
context.Add(requestAndPipeline.Context);
}
var remainingItems = _requestAndPipeline
.Skip(concurrentPipelineCount)
.Select(x => x);
var runningTasks = _requestAndPipeline
.Take(concurrentPipelineCount)
.Select(x => x.InvokeAsync())
.ToList();
while (runningTasks.Any())
{
var task = await Task.WhenAny(runningTasks.ToArray());
runningTasks.Remove(task);
var nextTask = remainingItems.FirstOrDefault();
if (nextTask != null)
{
runningTasks.Add(nextTask.InvokeAsync());
remainingItems = remainingItems.Skip(1);
}
}
await next.Invoke();
}
public async Task InvokeAsync(PipelineContext context, PipelineDelegate next)
{
if (context.GetFirst(out HttpResponseMessage responseMessage))
{
if (responseMessage.IsSuccessStatusCode)
{
var response = await responseMessage.Content.ReadAsStringAsync();
if (string.Compare("Exception:", response.Substring(0, 10), true) == 0)
{
context.AddNotification(this, response);
return;
}
}
else
{
context.AddNotification(this, $"Unsuccessful Response: {responseMessage.StatusCode}");
}
await next.Invoke();
}
else
{
throw new PipelineDependencyException <HttpRequestMessage>(this);
}
}
public async Task InvokeAsync(PipelineContext context, PipelineDelegate next)
{
await next.Invoke();
if (context.GetFirst(out HttpResponseMessage httpResponseMessage))
{
var code = (int)httpResponseMessage.StatusCode;
if ((Sanitize500s && Between(code, 500, 599)) ||
(Sanitize400s && Between(code, 400, 499)) ||
(Sanitize300s && Between(code, 300, 399)) ||
SanitizeResponseCodes.Contains(code))
{
if (SaveOriginalContent)
{
var originalResponse = new ResponseSanitizerContent();
originalResponse.Copy(httpResponseMessage);
context.Add(originalResponse);
}
HttpResponseBuilder.HttpResponseMessage(httpResponseMessage)
.WithNoContent()
.WithReasonPhrase(string.Empty)
.If(ReturnErrorReference,
resp => resp.WithStringContent($"{{\"errorReference\":\"{context.Id}\"}}"))
.If(ReplacementResponseCode.HasValue,
resp => resp.WithStatusCode(ReplacementResponseCode.Value));
}
}
}
public async Task InvokeAsync(PipelineContext context, PipelineDelegate next)
{
context.Remove(CircuitBreakerEnum.OpenState);
CircuitState.State currentState = CircuitState.State.Closed;
_circuitState.Invoke(x =>
currentState = x.GetState());
var activeStates = new[] { CircuitState.State.Closed, CircuitState.State.Half_Open };
if (activeStates.Any(x => x == currentState))
{
await next.Invoke();
if (!context.GetFirst(out HttpResponseMessage httpResponseMessage))
{
throw new PipelineDependencyException <HttpResponseMessage>(this);
}
_circuitState.Invoke(x =>
x.Update(!httpResponseMessage.IsTransientFailure()));
}
else
{
context.Add(CircuitBreakerEnum.OpenState);
}
}
public async Task Invoke(DataModel model, PipelineDelegate <DataModel> next)
{
if (_providers.ContainsKey(model.Guid) && model.RadioModel.Tone)
{
var token = _providers[model.Guid];
var current = DateTime.UtcNow.TimeOfDay;
if ((current - token.TimeStamp) > TimeDifferencePlaying)
{
_mixer.RemoveMixerInput(token.Provider);
var updatedSample = _toneProvider.CreateSampleProvider();
_providers[model.Guid] = new PlayerSampleToken
{
Provider = updatedSample,
TimeStamp = current
};
_mixer.AddMixerInput(updatedSample);
}
}
else if (model.RadioModel.Tone)
{
var sample = _toneProvider.CreateSampleProvider();
var timeStamp = DateTime.UtcNow.TimeOfDay;
var token = new PlayerSampleToken
{
Provider = sample,
TimeStamp = timeStamp
};
_providers[model.Guid] = token;
_mixer.AddMixerInput(token.Provider);
}
await next.Invoke(model);
}
public async Task <PipelineContext> InvokeAsync(PipelineContext context, Action <PipelineContext> invokeAction = null)
{
int index = 0;
var ctx = context ?? new PipelineContext();
PipelineDelegate pipelineDelegate = null;
pipelineDelegate =
async() =>
{
var nextHandler = _pipelineHandlers.Skip(index).FirstOrDefault();
index += 1;
if (nextHandler != null)
{
await nextHandler.InvokeAsync(ctx, pipelineDelegate);
}
};
try
{
invokeAction?.Invoke(ctx);
await pipelineDelegate.Invoke();
}
catch (Exception ex)
{
var handler = _pipelineHandlers.Skip(index - 1).FirstOrDefault();
ctx
.AddNotification(handler, $"Unhandled Exception: {ex.Message}")
.AddNotification(handler, ex.ToString());
}
return(ctx);
}
public async Task InvokeAsync(PipelineContext context, PipelineDelegate next)
{
if (!context.GetFirst(out HttpRequestMessage httpRequestMessage))
{
throw new PipelineDependencyException <HttpRequestMessage>(this);
}
HttpClientRequest request = new HttpClientRequest(httpRequestMessage);
CancellationTokenSource cts = new CancellationTokenSource(RequestTimeout);
var cancellationTokens = context.Get <CancellationToken>();
var token = cancellationTokens.Any()
? CancellationTokenSource.CreateLinkedTokenSource(
cancellationTokens.Concat(new[] { cts.Token }).ToArray()
).Token
: cts.Token;
try
{
var result = await request.InvokeAsync(token);
context.Add(result);
await next.Invoke();
}
catch (HttpRequestException ex)
{
throw new PipelineException(this, ex.Message, ex);
}
catch (Exception ex)
{
throw new PipelineException(this, ex.Message, ex);
}
}
public async Task InvokeAsync(PipelineContext context, PipelineDelegate next)
{
if (_queryParameters.Any())
{
if (!context.GetFirst(out Uri uri))
{
throw new PipelineDependencyException <Uri>(this);
}
var keyValuePairs = NameValueToKeyValuePairs(HttpUtility.ParseQueryString(uri.Query));
foreach (var queryParameter in _queryParameters)
{
if (context.Get(queryParameter.ContextVariableName, out string contextParameterValue) && !string.IsNullOrEmpty(contextParameterValue))
{
keyValuePairs.Add(new KeyValuePair <string, string>(queryParameter.ContextVariableName, contextParameterValue));
}
else
if (!queryParameter.Optional)
{
context.AddNotification(this, $"Context variable '{queryParameter.ContextVariableName}' was not found or does not contain a value and is not optional");
return;
}
}
var ub = new UriBuilder(uri);
QueryBuilder qb = new QueryBuilder(keyValuePairs);
ub.Query = qb.ToString();
context.AddOrReplace(ub.Uri);
await next.Invoke();
}
}
public async Task InvokeAsync(PipelineContext context, PipelineDelegate next)
{
await next.Invoke();
if (BeforeAdditionalBranchAction?.Invoke(context) ?? true)
{
await AdditionalBranch?.InvokeAsync(context);
}
}
public async Task InvokeAsync(PipelineContext context, PipelineDelegate next)
{
if (context.GetFirst(out HttpRequestMessage httpRequestMessage))
{
//var match = MethodsAndRoutes.FirstOrDefault(x => )
}
await next.Invoke();
}
public async Task Invoke(DataModel model, PipelineDelegate <DataModel> next)
{
if (model.NetworkTask != null &&
Math.Abs(model.NetworkTask.Frequency - model.RadioModel.Frequency) < 0.001)
{
OnDataAvailable?.Invoke(this, new DataEventArgs <NetworkTaskData>(model.NetworkTask));
}
await next.Invoke(model);
}
public async Task Invoke(DataModel model, PipelineDelegate <DataModel> next)
{
var buffer = _buffers.GetOrAdd(model.Guid, (guid) =>
{
var dictionaryBuffer = new BufferedWaveProvider(_format);
_mixer.AddMixerInput(dictionaryBuffer);
return(dictionaryBuffer);
});
buffer.AddSamples(model.RawAudioSample, 0, model.RawAudioSample.Length);
await next.Invoke(model);
}
public async Task InvokeAsync(PipelineContext context, PipelineDelegate next)
{
try
{
BeforeNextInvokeAction?.Invoke(context);
await next.Invoke();
}
finally
{
AfterNextInvokeAction?.Invoke(context);
}
}
public async Task InvokeAsync(PipelineContext context, PipelineDelegate next)
{
context.Remove(FixedIntervalRetryEnum.RetryCountExceeded);
int index = 0;
await next.Invoke();
while (IsTransientFailure(context))
{
var delay = Configuration.GetInterval(index);
if (!delay.HasValue)
{
context.Add(FixedIntervalRetryEnum.RetryCountExceeded);
break;
}
await Task.Delay(delay.Value);
await next.Invoke();
}
}
public async Task InvokeAsync(PipelineContext context, PipelineDelegate next)
{
bool useAlternateBranch = UseAlternateBranchAction?.Invoke(context) ?? false;
if (useAlternateBranch)
{
await AlternateBranch.InvokeAsync(context);
}
else
{
await next.Invoke();
}
}
private void Provider_OnDataAvaliable(object sender, DataEventArgs <byte[]> e)
{
try
{
var decompressed = _compressor.Decompress(e.Data);
var model = _converter.ConvertFrom(decompressed);
_pipeline.Invoke(model);
}
catch (Exception ex)
{
Debug.Write($"An exception in {nameof(AudioReceiverAndPlayer)} {ex.Message}.");
}
}
public async Task InvokeAsync(PipelineContext context, PipelineDelegate next)
{
if (!context.GetFirst(out HttpContext httpContext))
{
throw new PipelineDependencyException <HttpContext>(this);
}
PipelineConverters.Convert(httpContext.Request, out HttpRequestMessage httpRequestMessage, HeadersToRemove);
context
.Add(httpRequestMessage)
.Add(httpContext.RequestAborted);
await next.Invoke();
}
public async Task InvokeAsync(PipelineContext context, PipelineDelegate next)
{
if (!context.GetFirst(out HttpContext httpContext))
{
throw new PipelineDependencyException <HttpContext>(this);
}
var(result, versionNo) = GetVersionHeader(httpContext.Request.Headers);
if (result)
{
context.Add(versionNo);
}
await next.Invoke();
}
public async Task InvokeAsync(PipelineContext context, PipelineDelegate next)
{
var stopWatch = new System.Diagnostics.Stopwatch();
try
{
stopWatch.Start();
await next.Invoke();
}
finally
{
context.Add(stopWatch.Elapsed);
stopWatch.Stop();
}
}
public async Task InvokeAsync(PipelineContext context, PipelineDelegate next)
{
if (!context.GetFirst(out HttpRequestMessage httpRequestMessage))
{
throw new PipelineDependencyException <HttpRequestMessage>(this);
}
var parameters = HttpUtility.ParseQueryString(httpRequestMessage.RequestUri.Query);
var paramNameAndValue = parameters.Cast <string>()
.Where(key => string.Compare(key, ParamName, true) == 0)
.Select(key => new { key, value = parameters[key] })
.FirstOrDefault();
var matched = false;
switch (ParamEvaluation)
{
case ParamEvaluationEnum.ParamExists:
matched = paramNameAndValue != null;
break;
case ParamEvaluationEnum.ParamDoesNotExist:
matched = paramNameAndValue == null;
break;
case ParamEvaluationEnum.ParamValueMatches:
matched = string.Compare(paramNameAndValue?.value, ParamValue, true) == 0;
break;
case ParamEvaluationEnum.ParamValueDoesNotMatch:
matched = (paramNameAndValue != null) &&
string.Compare(paramNameAndValue?.value, ParamValue, true) != 0;
break;
}
if (matched)
{
UriBuilder builder = new UriBuilder(RedirectUrl)
{
Query = httpRequestMessage.RequestUri.Query
};
var redirectedUri = builder.Uri;
context.Add(new Redirected(httpRequestMessage, redirectedUri));
httpRequestMessage.RequestUri = redirectedUri;
}
await next.Invoke();
}
public async Task InvokeAsync(PipelineContext context, PipelineDelegate next)
{
PipelineContext parallelContext = new PipelineContext();
Task parallelTask = new Task(async() =>
await ParallelPipelineRequest.InvokeAsync(parallelContext));
parallelTask.Start();
context.Add(new ParallelPipelineInfo()
{
Context = parallelContext,
ParallelTask = parallelTask
});
await Task.WhenAll(new Task[] { next.Invoke(), parallelTask });
}
public async Task InvokeAsync(PipelineContext context, PipelineDelegate next)
{
await next.Invoke();
if (!context.GetFirst(out HttpContext httpContext))
{
throw new PipelineDependencyException <HttpContext>(this);
}
if (!context.GetFirst(out HttpResponseMessage httpResponseMessage))
{
throw new PipelineDependencyException <HttpResponseMessage>(this);
}
await PipelineConverters.Convert(httpResponseMessage, httpContext.Response, HeadersToRemove);
}
public async Task InvokeAsync(PipelineContext context, PipelineDelegate next)
{
if (context.GetFirst(out HttpRequestMessage httpRequestMessage))
{
UriBuilder builder = new UriBuilder(httpRequestMessage.RequestUri)
{
Host = RedirectHost,
Port = RedirectPort
};
var redirectUri = builder.Uri;
context.Add(new Redirected(httpRequestMessage, builder.Uri));
httpRequestMessage.RequestUri = redirectUri;
await next.Invoke();
}
else
throw new PipelineDependencyException<HttpRequestMessage>(this);
}
public async Task InvokeAsync(PipelineContext context, PipelineDelegate next)
{
if (context.Get("endpoint", out string endPoint))
{
if (BaseUrl == null)
{
context.AddNotification(this, "Missing BaseUrl value");
return;
}
var uri = BaseUrl.Append(endPoint);
context.Add(uri);
await next.Invoke();
}
else
{
context.AddNotification(this, "Missing endpoint information");
}
}
public async Task InvokeAsync(PipelineContext context, PipelineDelegate next)
{
if (context.GetFirst(out HttpResponseMessage responseMessage))
{
if (responseMessage.IsSuccessStatusCode)
{
var result = await responseMessage.Content.ReadAsStringAsync();
var response = JsonConvert.DeserializeObject <DublinBikeStation>(result);
context.Add("response", response);
}
await next.Invoke();
}
else
{
throw new PipelineDependencyException <HttpResponseMessage>(this);
}
}
public async Task InvokeAsync(PipelineContext context, PipelineDelegate next)
{
if (context.GetFirst(out HttpContext httpContext) && context.GetFirst(out string versionNo))
{
if (!string.IsNullOrEmpty(versionNo))
{
var request = httpContext.Request;
var pathSegments = request.Path.Value.Split('/').ToList();
if ((pathSegments.Count > 2) && (string.Compare(pathSegments[1], "api", true) == 0))
{
pathSegments.Insert(2, $"v{versionNo}");
var route = string.Join('/', pathSegments);
request.Path = route;
}
}
}
await next.Invoke();
}
public async Task InvokeAsync(PipelineContext context, PipelineDelegate next)
{
var count = Interlocked.Increment(ref _activeClients);
try
{
if (count <= MaxClients)
{
context.Remove(RateLimiterEnum.RateLimited);
await next.Invoke();
return;
}
context.Add(RateLimiterEnum.RateLimited);
}
finally
{
Interlocked.Decrement(ref _activeClients);
}
}
public async Task InvokeAsync(PipelineContext context, PipelineDelegate next)
{
try
{
await next.Invoke();
}
finally
{
IActionResult objectResult = null;
if (context.Get("response", out T response))
{
objectResult = new ObjectResult(response)
{
StatusCode = 200
}
}
;
else
{
objectResult = new ObjectResult(
new
{
context.Id,
notifications = context
.Get <Notification>()
.Select((x, i) =>
new
{
id = i + 1,
Handler = x.Handler.ToString(),
x.ErrorMessage
})
})
{
StatusCode = 500
};
}
context.Add <IActionResult>(objectResult);
}
}
public async Task InvokeAsync(PipelineContext context, PipelineDelegate next)
{
if (context.GetFirst(out IEnumerable <DublinBikeStation> response))
{
if (context.Get("orderBy", out string value))
{
var index = orderIdentifiers
.Select((x, i) => new { index = i, identifer = x })
.Where(x => string.Compare(x.identifer, value, true) == 0)
.Select(x => x.index)
.FirstOrDefault();
switch (index)
{
case 1:
response = response.OrderBy(x => x.Name);
break;
case 2:
response = response.OrderByDescending(x => x.Available_bikes);
break;
case 3:
response = response.OrderByDescending(x => x.Available_bike_stands);
break;
case 4:
response = response.OrderByDescending(x => x.Last_update);
break;
default:
response = response.OrderBy(x => x.Number);
break;
}
context.AddOrReplace("response", response.Select(x => x));
}
}
await next.Invoke();
}
