710 lines
36 KiB
C#
710 lines
36 KiB
C#
#if (!UNITY_WEBGL || UNITY_EDITOR) && !BESTHTTP_DISABLE_ALTERNATE_SSL
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#define ENABLE_LOGGING
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using System;
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using System.Collections.Concurrent;
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using System.Collections.Generic;
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using System.Threading;
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using Best.HTTP.Shared.Extensions;
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using Best.HTTP.Shared.PlatformSupport.Memory;
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using Best.HTTP.Shared.PlatformSupport.Threading;
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using Best.HTTP.Shared;
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using Best.HTTP.Shared.Logger;
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using Best.HTTP.Shared.PlatformSupport.Network.Tcp;
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using Best.HTTP.Shared.Streams;
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namespace Best.HTTP.Hosts.Connections.HTTP2
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{
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public delegate HTTP2Stream CustomHTTP2StreamFactory(HTTPRequest request, uint streamId, HTTP2ContentConsumer parentHandler, HTTP2SettingsManager registry, HPACKEncoder hpackEncoder);
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public sealed class HTTP2ContentConsumer : IHTTPRequestHandler, IContentConsumer, IThreadSignaler
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{
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public KeepAliveHeader KeepAlive { get { return null; } }
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public bool CanProcessMultiple { get { return !this.SentGoAwayFrame && this.isRunning && this._maxAssignedRequests > 1; } }
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public int AssignedRequests => this._assignedRequest;
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private int _assignedRequest;
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public int MaxAssignedRequests => this._maxAssignedRequests;
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private int _maxAssignedRequests = 1;
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public const UInt32 MaxValueFor31Bits = 0xFFFFFFFF >> 1;
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public double Latency { get; private set; }
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public HTTP2SettingsManager settings;
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public HPACKEncoder HPACKEncoder;
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public LoggingContext Context { get; private set; }
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public PeekableContentProviderStream ContentProvider { get; private set; }
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public HTTP2ConnectionSettings ConnectionSettings { get; private set; }
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private DateTime lastPingSent = DateTime.MinValue;
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private int waitingForPingAck = 0;
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private DateTime lastDataFrameReceived = DateTime.MinValue;
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public static int RTTBufferCapacity = 5;
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private CircularBuffer<double> rtts = new CircularBuffer<double>(RTTBufferCapacity);
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private volatile bool isRunning;
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private AutoResetEvent newFrameSignal = new AutoResetEvent(false);
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private ConcurrentQueue<HTTPRequest> requestQueue = new ConcurrentQueue<HTTPRequest>();
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private List<HTTP2Stream> clientInitiatedStreams = new List<HTTP2Stream>();
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private ConcurrentQueue<HTTP2FrameHeaderAndPayload> newFrames = new ConcurrentQueue<HTTP2FrameHeaderAndPayload>();
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private List<HTTP2FrameHeaderAndPayload> outgoingFrames = new List<HTTP2FrameHeaderAndPayload>();
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private UInt32 remoteWindow;
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private DateTime lastInteraction;
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private DateTime goAwaySentAt = DateTime.MaxValue;
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private bool SentGoAwayFrame { get => this.goAwaySentAt != DateTime.MaxValue; }
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private HTTPOverTCPConnection conn;
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private TimeSpan MaxGoAwayWaitTime { get { return !this.SentGoAwayFrame ? TimeSpan.MaxValue : TimeSpan.FromMilliseconds(Math.Max(this.Latency * 2.5, 1500)); } }
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// https://httpwg.org/specs/rfc7540.html#StreamIdentifiers
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// Streams initiated by a client MUST use odd-numbered stream identifiers
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// With an initial value of -1, the first client initiated stream's id going to be 1.
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private long LastStreamId = -1;
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public HTTP2ContentConsumer(HTTPOverTCPConnection conn)
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{
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this.Context = new LoggingContext(this);
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this.Context.Add("Parent", conn.Context);
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this.conn = conn;
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this.isRunning = true;
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this.ConnectionSettings = HTTPManager.PerHostSettings.Get(conn.HostKey).HTTP2ConnectionSettings;
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this.settings = new HTTP2SettingsManager(this.Context, this.ConnectionSettings);
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Process(this.conn.CurrentRequest);
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}
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public void Process(HTTPRequest request)
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{
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#if ENABLE_LOGGING
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HTTPManager.Logger.Information(nameof(HTTP2ContentConsumer), "Process request called", this.Context);
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#endif
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request.TimeoutSettings.SetProcessing(this.lastInteraction = DateTime.UtcNow);
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Interlocked.Increment(ref this._assignedRequest);
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this.requestQueue.Enqueue(request);
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SignalThread(SignalHandlerTypes.Signal);
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}
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public void SignalThread(SignalHandlerTypes signalType) => this.newFrameSignal?.Set();
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public void RunHandler()
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{
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#if ENABLE_LOGGING
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HTTPManager.Logger.Information(nameof(HTTP2ContentConsumer), "Processing thread up and running!", this.Context);
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#endif
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ThreadedRunner.SetThreadName("Best.HTTP2 Process");
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string abortWithMessage = string.Empty;
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try
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{
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bool atLeastOneStreamHasAFrameToSend = true;
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this.HPACKEncoder = new HPACKEncoder(this.Context, this.settings);
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// https://httpwg.org/specs/rfc7540.html#InitialWindowSize
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// The connection flow-control window is also 65,535 octets.
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this.remoteWindow = this.settings.RemoteSettings[HTTP2Settings.INITIAL_WINDOW_SIZE];
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// we want to pack as many data as we can in one tcp segment, but setting the buffer's size too high
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// we might keep data too long and send them in bursts instead of in a steady stream.
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// Keeping it too low might result in a full tcp segment and one with very low payload
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// Is it possible that one full tcp segment sized buffer would be the best, or multiple of it.
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// It would keep the network busy without any fragments. The ethernet layer has a maximum of 1500 bytes,
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// but there's two layers of 20 byte headers each, so as a theoretical maximum it's 1500-20-20 bytes.
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// On the other hand, if the buffer is small (1-2), that means that for larger data, we have to do a lot
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// of system calls, in that case a larger buffer might be better. Still, if we are not cpu bound,
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// a well saturated network might serve us better.
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using (WriteOnlyBufferedStream bufferedStream = new WriteOnlyBufferedStream(this.conn.TopStream, 1024 * 1024 /*1500 - 20 - 20*/, this.Context))
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{
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// The client connection preface starts with a sequence of 24 octets
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// Connection preface starts with the string PRI * HTTP/2.0\r\n\r\nSM\r\n\r\n).
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ReadOnlySpan<byte> MAGIC = stackalloc byte[24] { 0x50, 0x52, 0x49, 0x20, 0x2a, 0x20, 0x48, 0x54, 0x54, 0x50, 0x2f, 0x32, 0x2e, 0x30, 0x0d, 0x0a, 0x0d, 0x0a, 0x53, 0x4d, 0x0d, 0x0a, 0x0d, 0x0a };
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bufferedStream.Write(MAGIC);
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// This sequence MUST be followed by a SETTINGS frame (Section 6.5), which MAY be empty.
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// The client sends the client connection preface immediately upon receipt of a
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// 101 (Switching Protocols) response (indicating a successful upgrade)
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// or as the first application data octets of a TLS connection
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this.settings.InitiatedMySettings[HTTP2Settings.INITIAL_WINDOW_SIZE] = this.ConnectionSettings.InitialStreamWindowSize;
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this.settings.InitiatedMySettings[HTTP2Settings.MAX_CONCURRENT_STREAMS] = this.ConnectionSettings.MaxConcurrentStreams;
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this.settings.InitiatedMySettings[HTTP2Settings.ENABLE_CONNECT_PROTOCOL] = (uint)(this.ConnectionSettings.EnableConnectProtocol ? 1 : 0);
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this.settings.InitiatedMySettings[HTTP2Settings.ENABLE_PUSH] = 0;
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this.settings.SendChanges(this.outgoingFrames);
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this.settings.RemoteSettings.OnSettingChangedEvent += OnRemoteSettingChanged;
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// The default window size for the whole connection is 65535 bytes,
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// but we want to set it to the maximum possible value.
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Int64 initialConnectionWindowSize = this.ConnectionSettings.InitialConnectionWindowSize;
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// yandex.ru returns with an FLOW_CONTROL_ERROR (3) error when the plugin tries to set the connection window to 2^31 - 1
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// and works only with a maximum value of 2^31 - 10Mib (10 * 1024 * 1024).
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if (initialConnectionWindowSize == HTTP2ContentConsumer.MaxValueFor31Bits)
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initialConnectionWindowSize -= 10 * 1024 * 1024;
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if (initialConnectionWindowSize > 65535)
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{
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Int64 initialConnectionWindowSizeDiff = initialConnectionWindowSize - 65535;
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if (initialConnectionWindowSizeDiff > 0)
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this.outgoingFrames.Add(HTTP2FrameHelper.CreateWindowUpdateFrame(0, (UInt32)initialConnectionWindowSizeDiff, this.Context));
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}
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initialConnectionWindowSize -= 65535;
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// local, per-connection window
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long localConnectionWindow = initialConnectionWindowSize;
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UInt32 updateConnectionWindowAt = (UInt32)(localConnectionWindow / 2);
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while (this.isRunning)
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{
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DateTime now = DateTime.UtcNow;
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if (!atLeastOneStreamHasAFrameToSend)
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{
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// buffered stream will call flush automatically if its internal buffer is full.
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// But we have to make it sure that we flush remaining data before we go to sleep.
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bufferedStream.Flush();
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// Wait until we have to send the next ping, OR a new frame is received on the read thread.
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// lastPingSent Now lastPingSent+frequency lastPingSent+Ping timeout
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//----|---------------------|---------------|----------------------|----------------------|------------|
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// lastInteraction lastInteraction + MaxIdleTime
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var sendPingAt = this.lastPingSent + this.ConnectionSettings.PingFrequency;
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var timeoutAt = this.waitingForPingAck != 0 ? this.lastPingSent + this.ConnectionSettings.Timeout : DateTime.MaxValue;
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// sendPingAt can be in the past if Timeout is larger than PingFrequency
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var nextPingInteraction = sendPingAt < timeoutAt && sendPingAt >= now ? sendPingAt : timeoutAt;
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var disconnectByIdleAt = this.lastInteraction + this.ConnectionSettings.MaxIdleTime;
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var nextDueClientInteractionAt = nextPingInteraction < disconnectByIdleAt ? nextPingInteraction : disconnectByIdleAt;
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int wait = (int)(nextDueClientInteractionAt - now).TotalMilliseconds;
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wait = (int)Math.Min(wait, this.MaxGoAwayWaitTime.TotalMilliseconds);
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TimeSpan nextStreamInteraction = TimeSpan.MaxValue;
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for (int i = 0; i < this.clientInitiatedStreams.Count; i++)
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{
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var streamInteraction = this.clientInitiatedStreams[i].NextInteraction;
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if (streamInteraction < nextStreamInteraction)
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nextStreamInteraction = streamInteraction;
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}
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wait = (int)Math.Min(wait, nextStreamInteraction.TotalMilliseconds);
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wait = (int)Math.Min(wait, 1000);
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if (wait >= 1)
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{
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//if (HTTPManager.Logger.Level <= Logger.Loglevels.All)
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// HTTPManager.Logger.Information(nameof(HTTP2ContentConsumer), string.Format("Sleeping for {0:N0}ms", wait), this.Context);
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this.newFrameSignal.WaitOne(wait);
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now = DateTime.UtcNow;
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}
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}
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// Don't send a new ping until a pong isn't received for the last one
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if (now - this.lastPingSent >= this.ConnectionSettings.PingFrequency && Interlocked.CompareExchange(ref this.waitingForPingAck, 1, 0) == 0)
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{
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this.lastPingSent = now;
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var frame = HTTP2FrameHelper.CreatePingFrame(HTTP2PingFlags.None, this.Context);
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BufferHelper.SetLong(frame.Payload.Data, 0, now.Ticks);
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#if ENABLE_LOGGING
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HTTPManager.Logger.Information(nameof(HTTP2ContentConsumer), $"PING frame created with payload: {frame.Payload.Slice(0, 8)}", this.Context);
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#endif
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this.outgoingFrames.Add(frame);
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}
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// Process received frames
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HTTP2FrameHeaderAndPayload header;
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while (this.newFrames.TryDequeue(out header))
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{
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if (header.StreamId > 0)
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{
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switch (header.Type)
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{
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case HTTP2FrameTypes.DATA:
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localConnectionWindow -= header.Payload.Count;
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lastDataFrameReceived = now;
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break;
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}
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HTTP2Stream http2Stream = FindStreamById(header.StreamId);
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// Add frame to the stream, so it can process it when its Process function is called
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if (http2Stream != null)
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{
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http2Stream.AddFrame(header, this.outgoingFrames);
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}
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else
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{
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// Error? It's possible that we closed and removed the stream while the server was in the middle of sending frames
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#if ENABLE_LOGGING
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if (HTTPManager.Logger.Level == Loglevels.All)
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HTTPManager.Logger.Warning(nameof(HTTP2ContentConsumer), $"Can't deliver frame: {header}, because no stream could be found for its Id!", this.Context);
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#endif
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BufferPool.Release(header.Payload);
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}
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}
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else
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{
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switch (header.Type)
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{
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case HTTP2FrameTypes.SETTINGS:
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this.settings.Process(header, this.outgoingFrames);
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Interlocked.Exchange(ref this._maxAssignedRequests,
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(int)Math.Min(this.ConnectionSettings.MaxConcurrentStreams,
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this.settings.RemoteSettings[HTTP2Settings.MAX_CONCURRENT_STREAMS]));
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/*
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PluginEventHelper.EnqueuePluginEvent(
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new PluginEventInfo(PluginEvents.HTTP2ConnectProtocol,
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new HTTP2ConnectProtocolInfo(this.conn.HostKey,
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this.settings.MySettings[HTTP2Settings.ENABLE_CONNECT_PROTOCOL] == 1 && this.settings.RemoteSettings[HTTP2Settings.ENABLE_CONNECT_PROTOCOL] == 1)));
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*/
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break;
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case HTTP2FrameTypes.PING:
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var pingFrame = HTTP2FrameHelper.ReadPingFrame(header);
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if ((pingFrame.Flags & HTTP2PingFlags.ACK) != 0)
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{
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if (Interlocked.CompareExchange(ref this.waitingForPingAck, 0, 1) == 0)
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break; // waitingForPingAck was 0 == aren't expecting a ping ack!
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// it was an ack, payload must contain what we sent
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var ticks = BufferHelper.ReadLong(pingFrame.OpaqueData, 0);
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// the difference between the current time and the time when the ping message is sent
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TimeSpan diff = TimeSpan.FromTicks(now.Ticks - ticks);
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#if ENABLE_LOGGING
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if (diff.TotalSeconds > 10 || diff.TotalSeconds < 0)
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HTTPManager.Logger.Warning(nameof(HTTP2ContentConsumer), $"Pong received with weird diff: {diff}! Payload: {pingFrame.OpaqueData}", this.Context);
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#endif
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// add it to the buffer
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this.rtts.Add(diff.TotalMilliseconds);
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// and calculate the new latency
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this.Latency = CalculateLatency();
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#if ENABLE_LOGGING
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HTTPManager.Logger.Verbose(nameof(HTTP2ContentConsumer), string.Format("Latency: {0:F2}ms, RTT buffer: {1}", this.Latency, this.rtts.ToString()), this.Context);
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#endif
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}
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else if ((pingFrame.Flags & HTTP2PingFlags.ACK) == 0)
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{
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// https://httpwg.org/specs/rfc7540.html#PING
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// if it wasn't an ack for our ping, we have to send one
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var frame = HTTP2FrameHelper.CreatePingFrame(HTTP2PingFlags.ACK, this.Context);
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Array.Copy(pingFrame.OpaqueData.Data, 0, frame.Payload.Data, 0, pingFrame.OpaqueData.Count);
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this.outgoingFrames.Insert(0, frame);
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}
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BufferPool.Release(pingFrame.OpaqueData);
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break;
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case HTTP2FrameTypes.WINDOW_UPDATE:
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var windowUpdateFrame = HTTP2FrameHelper.ReadWindowUpdateFrame(header);
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this.remoteWindow += windowUpdateFrame.WindowSizeIncrement;
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break;
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case HTTP2FrameTypes.GOAWAY:
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// parse the frame, so we can print out detailed information
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HTTP2GoAwayFrame goAwayFrame = HTTP2FrameHelper.ReadGoAwayFrame(header);
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#if ENABLE_LOGGING
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HTTPManager.Logger.Information(nameof(HTTP2ContentConsumer), "Received GOAWAY frame: " + goAwayFrame.ToString(), this.Context);
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#endif
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abortWithMessage = string.Format("Server closing the connection! Error code: {0} ({1}) Additonal Debug Data: {2}",
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goAwayFrame.Error, goAwayFrame.ErrorCode, goAwayFrame.AdditionalDebugData);
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for (int i = 0; i < this.clientInitiatedStreams.Count; ++i)
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this.clientInitiatedStreams[i].Abort(abortWithMessage);
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this.clientInitiatedStreams.Clear();
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// set the running flag to false, so the thread can exit
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this.isRunning = false;
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BufferPool.Release(goAwayFrame.AdditionalDebugData);
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//this.conn.State = HTTPConnectionStates.Closed;
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break;
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case HTTP2FrameTypes.ALT_SVC:
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//HTTP2AltSVCFrame altSvcFrame = HTTP2FrameHelper.ReadAltSvcFrame(header);
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// Implement
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//HTTPManager.EnqueuePluginEvent(new PluginEventInfo(PluginEvents.AltSvcHeader, new AltSvcEventInfo(altSvcFrame.Origin, ))
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break;
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}
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if (header.Payload != null)
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BufferPool.Release(header.Payload);
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}
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}
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// If no pong received in a (configurable) reasonable time, treat the connection broken
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if (this.waitingForPingAck != 0)
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{
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// Even if we weren't received a ping ack, check for data frames.
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// If data is flowing in, we can say that the connection is still healthy.
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var lastPingDiff = now - this.lastPingSent;
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var lastDataDiff = now - this.lastDataFrameReceived;
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if(lastPingDiff >= this.ConnectionSettings.Timeout && lastDataDiff >= this.ConnectionSettings.Timeout)
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throw new TimeoutException("Ping ACK isn't received in time!");
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}
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// pre-test stream count to lock only when truly needed.
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if (this.clientInitiatedStreams.Count < _maxAssignedRequests && this.isRunning)
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{
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// grab requests from queue
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HTTPRequest request;
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while (this.clientInitiatedStreams.Count < _maxAssignedRequests && this.requestQueue.TryDequeue(out request))
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{
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HTTP2Stream newStream = null;
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if (request.Tag is CustomHTTP2StreamFactory factory)
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{
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newStream = factory(request, (UInt32)Interlocked.Add(ref LastStreamId, 2), this, this.settings, this.HPACKEncoder);
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}
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else
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{
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newStream = new HTTP2Stream((UInt32)Interlocked.Add(ref LastStreamId, 2), this, this.settings, this.HPACKEncoder);
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}
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newStream.Assign(request);
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this.clientInitiatedStreams.Add(newStream);
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}
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}
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// send any settings changes
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this.settings.SendChanges(this.outgoingFrames);
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atLeastOneStreamHasAFrameToSend = false;
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// process other streams
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for (int i = 0; i < this.clientInitiatedStreams.Count; ++i)
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{
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var stream = this.clientInitiatedStreams[i];
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stream.Process(this.outgoingFrames);
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// remove closed, empty streams (not enough to check the closed flag, a closed stream still can contain frames to send)
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if (stream.State == HTTP2StreamStates.Closed && !stream.HasFrameToSend)
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{
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this.clientInitiatedStreams.RemoveAt(i--);
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stream.Removed();
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Interlocked.Decrement(ref this._assignedRequest);
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}
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atLeastOneStreamHasAFrameToSend |= stream.HasFrameToSend;
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this.lastInteraction = now;
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}
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// If we encounter a data frame that too large for the current remote window, we have to stop
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// sending all data frames as we could send smaller data frames before the large ones.
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// Room for improvement: An improvement would be here to stop data frame sending per-stream.
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bool haltDataSending = false;
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if (this.ShutdownType == ShutdownTypes.Running && !this.SentGoAwayFrame && now - this.lastInteraction >= this.ConnectionSettings.MaxIdleTime)
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{
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this.lastInteraction = now;
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#if ENABLE_LOGGING
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HTTPManager.Logger.Information(nameof(HTTP2ContentConsumer), "Reached idle time, sending GoAway frame!", this.Context);
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#endif
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this.outgoingFrames.Add(HTTP2FrameHelper.CreateGoAwayFrame(0, HTTP2ErrorCodes.NO_ERROR, this.Context));
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this.goAwaySentAt = now;
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}
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// https://httpwg.org/specs/rfc7540.html#GOAWAY
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// Endpoints SHOULD always send a GOAWAY frame before closing a connection so that the remote peer can know whether a stream has been partially processed or not.
|
|
if (this.ShutdownType == ShutdownTypes.Gentle && !this.SentGoAwayFrame)
|
|
{
|
|
#if ENABLE_LOGGING
|
|
HTTPManager.Logger.Information(nameof(HTTP2ContentConsumer), "Connection abort requested, sending GoAway frame!", this.Context);
|
|
#endif
|
|
|
|
this.outgoingFrames.Clear();
|
|
this.outgoingFrames.Add(HTTP2FrameHelper.CreateGoAwayFrame(0, HTTP2ErrorCodes.NO_ERROR, this.Context));
|
|
this.goAwaySentAt = now;
|
|
}
|
|
|
|
if (this.isRunning && this.SentGoAwayFrame && now - goAwaySentAt >= this.MaxGoAwayWaitTime)
|
|
{
|
|
#if ENABLE_LOGGING
|
|
HTTPManager.Logger.Information(nameof(HTTP2ContentConsumer), "No GoAway frame received back. Really quitting now!", this.Context);
|
|
#endif
|
|
this.isRunning = false;
|
|
continue;
|
|
}
|
|
|
|
if (localConnectionWindow < updateConnectionWindowAt)
|
|
{
|
|
UInt32 diff = (UInt32)(initialConnectionWindowSize - localConnectionWindow);
|
|
|
|
#if ENABLE_LOGGING
|
|
if (HTTPManager.Logger.IsDiagnostic)
|
|
HTTPManager.Logger.Information(nameof(HTTP2ContentConsumer), $"Updating local connection window by {diff:N0} ({initialConnectionWindowSize:N0} - {localConnectionWindow:N0})", this.Context);
|
|
#endif
|
|
|
|
this.outgoingFrames.Add(HTTP2FrameHelper.CreateWindowUpdateFrame(0, diff, this.Context));
|
|
localConnectionWindow = initialConnectionWindowSize;
|
|
}
|
|
|
|
// Go through all the collected frames and send them.
|
|
for (int i = 0; i < this.outgoingFrames.Count; ++i)
|
|
{
|
|
var frame = this.outgoingFrames[i];
|
|
|
|
#if ENABLE_LOGGING
|
|
if (HTTPManager.Logger.IsDiagnostic && frame.Type != HTTP2FrameTypes.DATA /*&& frame.Type != HTTP2FrameTypes.PING*/)
|
|
HTTPManager.Logger.Information(nameof(HTTP2ContentConsumer), "Sending frame: " + frame.ToString(), this.Context);
|
|
#endif
|
|
|
|
// post process frames
|
|
switch (frame.Type)
|
|
{
|
|
case HTTP2FrameTypes.DATA:
|
|
if (haltDataSending)
|
|
continue;
|
|
|
|
// if the tracked remoteWindow is smaller than the frame's payload, we stop sending
|
|
// data frames until we receive window-update frames
|
|
if (frame.Payload.Count > this.remoteWindow)
|
|
{
|
|
haltDataSending = true;
|
|
#if ENABLE_LOGGING
|
|
HTTPManager.Logger.Warning(nameof(HTTP2ContentConsumer), string.Format("Data sending halted for this round. Remote Window: {0:N0}, frame: {1}", this.remoteWindow, frame.ToString()), this.Context);
|
|
#endif
|
|
continue;
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
this.outgoingFrames.RemoveAt(i--);
|
|
|
|
static void SendHeader(WriteOnlyBufferedStream stream,
|
|
HTTP2FrameHeaderAndPayload headerAndPayload)
|
|
{
|
|
Span<byte> frameData = stackalloc byte[9];
|
|
HTTP2FrameHelper.HeaderAsBinary(headerAndPayload, frameData);
|
|
stream.Write(frameData);
|
|
}
|
|
|
|
SendHeader(bufferedStream, frame);
|
|
|
|
if (frame.Payload.Count > 0)
|
|
{
|
|
bufferedStream.Write(frame.Payload.Data, frame.Payload.Offset, frame.Payload.Count);
|
|
|
|
if (!frame.DontUseMemPool)
|
|
BufferPool.Release(frame.Payload);
|
|
}
|
|
|
|
if (frame.Type == HTTP2FrameTypes.DATA)
|
|
this.remoteWindow -= (uint)frame.Payload.Count;
|
|
}
|
|
|
|
bufferedStream.Flush();
|
|
} // while (this.isRunning)
|
|
|
|
bufferedStream.Flush();
|
|
}
|
|
}
|
|
catch (Exception ex)
|
|
{
|
|
abortWithMessage = ex.ToString();
|
|
// Log out the exception if it's a non-expected one.
|
|
if (this.ShutdownType == ShutdownTypes.Running && this.isRunning && !this.SentGoAwayFrame && !HTTPManager.IsQuitting)
|
|
HTTPManager.Logger.Exception(nameof(HTTP2ContentConsumer), "Sender thread", ex, this.Context);
|
|
}
|
|
finally
|
|
{
|
|
this.isRunning = false;
|
|
|
|
#if ENABLE_LOGGING
|
|
HTTPManager.Logger.Information(nameof(HTTP2ContentConsumer), $"Sender thread closing - cleaning up remaining requests({this.clientInitiatedStreams.Count})...", this.Context);
|
|
#endif
|
|
|
|
if (string.IsNullOrEmpty(abortWithMessage))
|
|
abortWithMessage = "Connection closed unexpectedly";
|
|
|
|
for (int i = 0; i < this.clientInitiatedStreams.Count; ++i)
|
|
this.clientInitiatedStreams[i].Abort(abortWithMessage);
|
|
this.clientInitiatedStreams.Clear();
|
|
|
|
#if ENABLE_LOGGING
|
|
HTTPManager.Logger.Information(nameof(HTTP2ContentConsumer), "Sender thread closing", this.Context);
|
|
#endif
|
|
|
|
ConnectionEventHelper.EnqueueConnectionEvent(new ConnectionEventInfo(this.conn, HTTPConnectionStates.Closed));
|
|
}
|
|
}
|
|
|
|
private void OnRemoteSettingChanged(HTTP2SettingsRegistry registry, HTTP2Settings setting, uint oldValue, uint newValue)
|
|
{
|
|
switch (setting)
|
|
{
|
|
case HTTP2Settings.INITIAL_WINDOW_SIZE:
|
|
this.remoteWindow = newValue - (oldValue - this.remoteWindow);
|
|
break;
|
|
}
|
|
}
|
|
|
|
public void SetBinding(PeekableContentProviderStream contentProvider) => this.ContentProvider = contentProvider;
|
|
public void UnsetBinding() => this.ContentProvider = null;
|
|
|
|
public void OnContent()
|
|
{
|
|
try
|
|
{
|
|
while (this.isRunning && HTTP2FrameHelper.CanReadFullFrame(this.ContentProvider))
|
|
{
|
|
HTTP2FrameHeaderAndPayload header = HTTP2FrameHelper.ReadHeader(this.ContentProvider, this.Context);
|
|
|
|
#if ENABLE_LOGGING
|
|
if (HTTPManager.Logger.IsDiagnostic /*&& header.Type != HTTP2FrameTypes.DATA /*&& header.Type != HTTP2FrameTypes.PING*/)
|
|
HTTPManager.Logger.Information(nameof(HTTP2ContentConsumer), "New frame received: " + header.ToString(), this.Context);
|
|
#endif
|
|
|
|
// Add the new frame to the queue. Processing it on the write thread gives us the advantage that
|
|
// we don't have to deal with too much locking.
|
|
this.newFrames.Enqueue(header);
|
|
}
|
|
}
|
|
catch (Exception ex)
|
|
{
|
|
HTTPManager.Logger.Exception(nameof(HTTP2ContentConsumer), "", ex, this.Context);
|
|
}
|
|
finally
|
|
{
|
|
// ping write thread to process the new frame
|
|
this.newFrameSignal?.Set();
|
|
}
|
|
}
|
|
|
|
public void OnConnectionClosed()
|
|
{
|
|
#if ENABLE_LOGGING
|
|
HTTPManager.Logger.Verbose(nameof(HTTP2ContentConsumer), $"{nameof(OnConnectionClosed)}({this.isRunning})", this.Context);
|
|
#endif
|
|
this.isRunning = false;
|
|
this.newFrameSignal?.Set();
|
|
}
|
|
|
|
public void OnError(Exception ex)
|
|
{
|
|
#if ENABLE_LOGGING
|
|
HTTPManager.Logger.Exception(nameof(HTTP2ContentConsumer), $"{nameof(OnError)}({this.isRunning}, {ex})", ex, this.Context);
|
|
#endif
|
|
this.isRunning = false;
|
|
this.newFrameSignal?.Set();
|
|
}
|
|
|
|
private double CalculateLatency()
|
|
{
|
|
if (this.rtts.Count == 0)
|
|
return 0;
|
|
|
|
double sumLatency = 0;
|
|
for (int i = 0; i < this.rtts.Count; ++i)
|
|
sumLatency += this.rtts[i];
|
|
|
|
return sumLatency / this.rtts.Count;
|
|
}
|
|
|
|
HTTP2Stream FindStreamById(UInt32 streamId)
|
|
{
|
|
for (int i = 0; i < this.clientInitiatedStreams.Count; ++i)
|
|
{
|
|
var stream = this.clientInitiatedStreams[i];
|
|
if (stream.Id == streamId)
|
|
return stream;
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
public ShutdownTypes ShutdownType { get; private set; }
|
|
|
|
public void Shutdown(ShutdownTypes type)
|
|
{
|
|
this.ShutdownType = type;
|
|
|
|
switch (this.ShutdownType)
|
|
{
|
|
case ShutdownTypes.Gentle:
|
|
this.newFrameSignal.Set();
|
|
break;
|
|
|
|
case ShutdownTypes.Immediate:
|
|
this.conn?.TopStream?.Dispose();
|
|
break;
|
|
}
|
|
}
|
|
|
|
public void Dispose()
|
|
{
|
|
#if ENABLE_LOGGING
|
|
HTTPManager.Logger.Information(nameof(HTTP2ContentConsumer), "Dispose", this.Context);
|
|
#endif
|
|
|
|
while (this.newFrames.TryDequeue(out var frame))
|
|
BufferPool.Release(frame.Payload);
|
|
|
|
foreach (var frame in this.outgoingFrames)
|
|
BufferPool.Release(frame.Payload);
|
|
this.outgoingFrames.Clear();
|
|
|
|
HTTPRequest request = null;
|
|
while (this.requestQueue.TryDequeue(out request))
|
|
{
|
|
#if ENABLE_LOGGING
|
|
HTTPManager.Logger.Information(nameof(HTTP2ContentConsumer), string.Format("Dispose - Request '{0}' IsCancellationRequested: {1}", request.CurrentUri.ToString(), request.IsCancellationRequested.ToString()), this.Context);
|
|
#endif
|
|
RequestEventHelper.EnqueueRequestEvent(request.IsCancellationRequested ? new RequestEventInfo(request, HTTPRequestStates.Aborted, null) : new RequestEventInfo(request, RequestEvents.Resend));
|
|
}
|
|
|
|
this.newFrameSignal?.Close();
|
|
this.newFrameSignal = null;
|
|
}
|
|
}
|
|
}
|
|
|
|
#endif
|