internal static void ProcessQueue()
{
RequestEventInfo requestEvent;
while (requestEventQueue.TryDequeue(out requestEvent))
{
HTTPRequest source = requestEvent.SourceRequest;
if (HTTPManager.Logger.Level == Loglevels.All)
{
HTTPManager.Logger.Information("RequestEventHelper", "Processing request event: " + requestEvent.ToString(), source.Context);
}
if (OnEvent != null)
{
try
{
OnEvent(requestEvent);
}
catch (Exception ex)
{
HTTPManager.Logger.Exception("RequestEventHelper", "ProcessQueue", ex, source.Context);
}
}
switch (requestEvent.Event)
{
case RequestEvents.StreamingData:
{
var response = source.Response;
if (response != null)
{
System.Threading.Interlocked.Decrement(ref response.UnprocessedFragments);
}
bool reuseBuffer = true;
try
{
if (source.OnStreamingData != null)
{
reuseBuffer = source.OnStreamingData(source, response, requestEvent.Data, requestEvent.DataLength);
}
}
catch (Exception ex)
{
HTTPManager.Logger.Exception("RequestEventHelper", "Process RequestEventQueue - RequestEvents.StreamingData", ex, source.Context);
}
if (reuseBuffer)
{
BufferPool.Release(requestEvent.Data);
}
break;
}
case RequestEvents.DownloadProgress:
try
{
if (source.OnDownloadProgress != null)
{
source.OnDownloadProgress(source, requestEvent.Progress, requestEvent.ProgressLength);
}
}
catch (Exception ex)
{
HTTPManager.Logger.Exception("RequestEventHelper", "Process RequestEventQueue - RequestEvents.DownloadProgress", ex, source.Context);
}
break;
case RequestEvents.UploadProgress:
try
{
if (source.OnUploadProgress != null)
{
source.OnUploadProgress(source, requestEvent.Progress, requestEvent.ProgressLength);
}
}
catch (Exception ex)
{
HTTPManager.Logger.Exception("RequestEventHelper", "Process RequestEventQueue - RequestEvents.UploadProgress", ex, source.Context);
}
break;
case RequestEvents.Upgraded:
try
{
if (source.OnUpgraded != null)
{
source.OnUpgraded(source, source.Response);
}
}
catch (Exception ex)
{
HTTPManager.Logger.Exception("RequestEventHelper", "Process RequestEventQueue - RequestEvents.Upgraded", ex, source.Context);
}
IProtocol protocol = source.Response as IProtocol;
if (protocol != null)
{
ProtocolEventHelper.AddProtocol(protocol);
}
break;
case RequestEvents.Resend:
source.State = HTTPRequestStates.Initial;
var host = HostManager.GetHost(source.CurrentUri.Host);
host.Send(source);
break;
case RequestEvents.Headers:
{
try
{
var response = source.Response;
if (source.OnHeadersReceived != null && response != null)
{
source.OnHeadersReceived(source, response);
}
}
catch (Exception ex)
{
HTTPManager.Logger.Exception("RequestEventHelper", "Process RequestEventQueue - RequestEvents.Headers", ex, source.Context);
}
break;
}
case RequestEvents.StateChange:
try
{
RequestEventHelper.HandleRequestStateChange(requestEvent);
}
catch (Exception ex)
{
HTTPManager.Logger.Exception("RequestEventHelper", "HandleRequestStateChange", ex, source.Context);
}
break;
}
}
}
internal static void HandleRequestStateChange(RequestEventInfo @event)
{
HTTPRequest source = @event.SourceRequest;
// Because there's a race condition between setting the request's State in its Abort() function running on Unity's main thread
// and the HTTP1/HTTP2 handlers running on an another one.
// Because of these race conditions cases violating expectations can be:
// 1.) State is finished but the response null
// 2.) State is (Connection)TimedOut and the response non-null
// We have to make sure that no callbacks are called twice and in the request must be in a consistent state!
// State | Request
// --------- +---------
// 1 Null
// Finished | Skip
// Timeout/Abort | Deliver
//
// 2 Non-Null
// Finished | Deliver
// Timeout/Abort | Skip
switch (@event.State)
{
case HTTPRequestStates.Queued:
source.QueuedAt = DateTime.UtcNow;
if ((!source.UseStreaming && source.UploadStream == null) || source.EnableTimoutForStreaming)
{
BestHTTP.Extensions.Timer.Add(new TimerData(TimeSpan.FromSeconds(1), @event.SourceRequest, AbortRequestWhenTimedOut));
}
break;
case HTTPRequestStates.ConnectionTimedOut:
case HTTPRequestStates.TimedOut:
case HTTPRequestStates.Error:
case HTTPRequestStates.Aborted:
source.Response = null;
goto case HTTPRequestStates.Finished;
case HTTPRequestStates.Finished:
#if !BESTHTTP_DISABLE_CACHING
// Here we will try to load content for a failed load. Failed load is a request with ConnectionTimedOut, TimedOut or Error state.
// A request with Finished state but response with status code >= 500 also something that we will try to load from the cache.
// We have to set what we going to try to load here too (other place is inside IsCachedEntityExpiresInTheFuture) as we don't want to load a cached content for
// a request that just finished without any problem!
try
{
bool tryLoad = !source.DisableCache && source.State != HTTPRequestStates.Aborted && (source.State != HTTPRequestStates.Finished || source.Response == null || source.Response.StatusCode >= 500);
if (tryLoad && Caching.HTTPCacheService.IsCachedEntityExpiresInTheFuture(source))
{
HTTPManager.Logger.Information("RequestEventHelper", "IsCachedEntityExpiresInTheFuture check returned true! CurrentUri: " + source.CurrentUri.ToString(), source.Context);
PlatformSupport.Threading.ThreadedRunner.RunShortLiving <HTTPRequest>((req) =>
{
// Disable any other cache activity.
req.DisableCache = true;
var originalState = req.State;
if (Connections.ConnectionHelper.TryLoadAllFromCache("RequestEventHelper", req, req.Context))
{
if (req.State != HTTPRequestStates.Finished)
{
req.State = HTTPRequestStates.Finished;
}
else
{
RequestEventHelper.EnqueueRequestEvent(new RequestEventInfo(req, HTTPRequestStates.Finished));
}
}
else
{
HTTPManager.Logger.Information("RequestEventHelper", "TryLoadAllFromCache failed to load! CurrentUri: " + req.CurrentUri.ToString(), source.Context);
// If for some reason it couldn't load we place back the request to the queue.
RequestEventHelper.EnqueueRequestEvent(new RequestEventInfo(req, originalState));
}
}, source);
break;
}
}
catch (Exception ex)
{
HTTPManager.Logger.Exception("RequestEventHelper", string.Format("HandleRequestStateChange - Cache probe - CurrentUri: \"{0}\" State: {1} StatusCode: {2}", source.CurrentUri, source.State, source.Response != null ? source.Response.StatusCode : 0), ex, source.Context);
}
#endif
source.Timing.Add(TimingEventNames.Queued_For_Disptach);
source.Timing.Add(TimingEventNames.Finished, DateTime.Now - source.Timing.Start);
if (source.Callback != null)
{
try
{
source.Callback(source, source.Response);
source.Timing.Add(TimingEventNames.Callback);
if (HTTPManager.Logger.Level <= Loglevels.Information)
{
HTTPManager.Logger.Information("RequestEventHelper", "Finishing request. Timings: " + source.Timing.ToString(), source.Context);
}
}
catch (Exception ex)
{
HTTPManager.Logger.Exception("RequestEventHelper", "HandleRequestStateChange " + @event.State, ex, source.Context);
}
}
source.Dispose();
HostManager.GetHost(source.CurrentUri.Host)
.GetHostDefinition(HostDefinition.GetKeyForRequest(source))
.TryToSendQueuedRequests();
break;
}
}
internal static void HandleRequestStateChange(RequestEventInfo @event)
{
HTTPRequest source = @event.SourceRequest;
switch (@event.State)
{
case HTTPRequestStates.Processing:
if ((!source.UseStreaming && source.UploadStream == null) || source.EnableTimoutForStreaming)
{
BestHTTP.Extensions.Timer.Add(new TimerData(TimeSpan.FromSeconds(1), @event.SourceRequest, AbortRequestWhenTimedOut));
}
break;
case HTTPRequestStates.ConnectionTimedOut:
case HTTPRequestStates.TimedOut:
case HTTPRequestStates.Error:
case HTTPRequestStates.Aborted:
case HTTPRequestStates.Finished:
#if !BESTHTTP_DISABLE_CACHING
// Here we will try to load content for a failed load. Failed load is a request with ConnectionTimedOut, TimedOut or Error state.
// A request with Finished state but response with status code >= 500 also something that we will try to load from the cache.
// We have to set what we going to try to load here too (other place is inside IsCachedEntityExpiresInTheFuture) as we don't want to load a cached content for
// a request that just finished without any problem!
try
{
bool tryLoad = !source.DisableCache && source.State != HTTPRequestStates.Aborted && (source.State != HTTPRequestStates.Finished || source.Response == null || source.Response.StatusCode >= 500);
if (tryLoad && Caching.HTTPCacheService.IsCachedEntityExpiresInTheFuture(source))
{
HTTPManager.Logger.Information("RequestEventHelper", "IsCachedEntityExpiresInTheFuture check returned true! CurrentUri: " + source.CurrentUri.ToString(), source.Context);
PlatformSupport.Threading.ThreadedRunner.RunShortLiving <HTTPRequest>((req) =>
{
// Disable any other cache activity.
req.DisableCache = true;
var originalState = req.State;
if (Connections.ConnectionHelper.TryLoadAllFromCache("RequestEventHelper", req, req.Context))
{
if (req.State != HTTPRequestStates.Finished)
{
req.State = HTTPRequestStates.Finished;
}
else
{
RequestEventHelper.EnqueueRequestEvent(new RequestEventInfo(req, HTTPRequestStates.Finished));
}
}
else
{
HTTPManager.Logger.Information("RequestEventHelper", "TryLoadAllFromCache failed to load! CurrentUri: " + req.CurrentUri.ToString(), source.Context);
// If for some reason it couldn't load we place back the request to the queue.
RequestEventHelper.EnqueueRequestEvent(new RequestEventInfo(req, originalState));
}
}, source);
break;
}
}
catch (Exception ex)
{
HTTPManager.Logger.Exception("RequestEventHelper", string.Format("HandleRequestStateChange - Cache probe - CurrentUri: \"{0}\" State: {1} StatusCode: {2}", source.CurrentUri, source.State, source.Response != null ? source.Response.StatusCode : 0), ex, source.Context);
}
#endif
if (source.Callback != null)
{
try
{
source.Callback(source, source.Response);
}
catch (Exception ex)
{
HTTPManager.Logger.Exception("RequestEventHelper", "HandleRequestStateChange " + @event.State, ex, source.Context);
}
}
source.Dispose();
HostManager.GetHost(source.CurrentUri.Host)
.GetHostDefinition(HostDefinition.GetKeyForRequest(source))
.TryToSendQueuedRequests();
break;
}
}
