openai/openai-dotnet
Publicmirrored from https://github.com/openai/openai-dotnetAvailable
src/Utility/ServerSentEventEnumerable.cs
81lines · modeblame
9f9f2936Jose Arriaga Maldonado2 years ago | 1 | using System; |
| 2 | using System.Collections; | |
| 3 | using System.Collections.Generic; | |
| 4 | using System.IO; | |
| 5 | using System.Threading; | |
| 6 | | |
| 7 | #nullable enable | |
| 8 | | |
| 9 | namespace OpenAI; | |
| 10 | | |
| 11 | /// <summary> | |
| 12 | /// Represents a collection of SSE events that can be enumerated as a C# collection. | |
| 13 | /// </summary> | |
| 14 | internal class ServerSentEventEnumerable : IEnumerable<ServerSentEvent> | |
| 15 | { | |
| 16 | private readonly Stream _contentStream; | |
| 17 | | |
| 18 | public ServerSentEventEnumerable(Stream contentStream) | |
| 19 | { | |
| 20 | Argument.AssertNotNull(contentStream, nameof(contentStream)); | |
| 21 | | |
| 22 | _contentStream = contentStream; | |
| 23 | | |
| 24 | LastEventId = string.Empty; | |
| 25 | ReconnectionInterval = Timeout.InfiniteTimeSpan; | |
| 26 | } | |
| 27 | | |
| 28 | public string LastEventId { get; private set; } | |
| 29 | | |
| 30 | public TimeSpan ReconnectionInterval { get; private set; } | |
| 31 | | |
| 32 | public IEnumerator<ServerSentEvent> GetEnumerator() | |
| 33 | { | |
| 34 | return new ServerSentEventEnumerator(_contentStream, this); | |
| 35 | } | |
| 36 | | |
| 37 | IEnumerator IEnumerable.GetEnumerator() => GetEnumerator(); | |
| 38 | | |
| 39 | private sealed class ServerSentEventEnumerator : IEnumerator<ServerSentEvent> | |
| 40 | { | |
| 41 | private readonly ServerSentEventReader _reader; | |
| 42 | private readonly ServerSentEventEnumerable _enumerable; | |
| 43 | | |
| 44 | public ServerSentEventEnumerator(Stream contentStream, ServerSentEventEnumerable enumerable) | |
| 45 | { | |
| 46 | _reader = new(contentStream); | |
| 47 | _enumerable = enumerable; | |
| 48 | } | |
| 49 | | |
| 50 | public ServerSentEvent Current { get; private set; } | |
| 51 | | |
| 52 | object IEnumerator.Current => Current; | |
| 53 | | |
| 54 | public bool MoveNext() | |
| 55 | { | |
| 56 | ServerSentEvent? nextEvent = _reader.TryGetNextEvent(); | |
| 57 | _enumerable.LastEventId = _reader.LastEventId; | |
| 58 | _enumerable.ReconnectionInterval = _reader.ReconnectionInterval; | |
| 59 | | |
| 60 | if (nextEvent.HasValue) | |
| 61 | { | |
| 62 | Current = nextEvent.Value; | |
| 63 | return true; | |
| 64 | } | |
| 65 | | |
| 66 | Current = default; | |
| 67 | return false; | |
| 68 | } | |
| 69 | | |
| 70 | public void Reset() | |
| 71 | { | |
| 72 | throw new NotSupportedException("Cannot seek back in an SSE stream."); | |
| 73 | } | |
| 74 | | |
| 75 | public void Dispose() | |
| 76 | { | |
| 77 | // The creator of the enumerable has responsibility for disposing | |
| 78 | // the content stream passed to the enumerable constructor. | |
| 79 | } | |
| 80 | } | |
| 81 | } |