58 lines
2.0 KiB
C#
58 lines
2.0 KiB
C#
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using System.Net.ServerSentEvents;
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using System.Text.Json.Serialization;
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using System.Threading.Channels;
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namespace s8n_runtime;
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public class WorkflowEditApiChannel : WorkflowRuntimeNodeBase, IWorkflowNodeRunnable
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{
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private WebApplication? _app;
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public static Channel<LogServerEvent>? LogServerChannel;
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public ushort Port { get; set; } = 3080;
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public async Task OnStart(WorkflowRuntime runtime, CancellationToken cancellation)
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{
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var builder = WebApplication.CreateBuilder();
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builder.WebHost.UseUrls($"http://localhost:{Port}");
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builder.Services.AddOpenApi().ConfigureHttpJsonOptions(options =>
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{
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var opts = options.SerializerOptions;
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opts.IncludeFields = true;
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opts.DefaultIgnoreCondition = JsonIgnoreCondition.WhenWritingNull;
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opts.Converters.Add(new JsonStringEnumConverter());
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}).AddCors();
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builder.Services.AddSingleton(LogServerChannel = Channel.CreateBounded<LogServerEvent>(new BoundedChannelOptions(10000)
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{
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FullMode = BoundedChannelFullMode.DropOldest
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}));
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_app = builder.Build();
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_app.MapOpenApi();
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_app.UseCors(policy => policy.AllowAnyOrigin());
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_app.MapGet("/api/runtime", () => runtime);
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_app.MapGet("/api/log", (Channel<LogServerEvent> channel) =>
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{
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return TypedResults.ServerSentEvents(GetEvents());
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async IAsyncEnumerable<SseItem<LogServerEvent>> GetEvents()
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{
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if (channel == null) yield break;
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var reader = channel.Reader;
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while (await reader.WaitToReadAsync())
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{
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if (reader.TryRead(out var message))
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{
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yield return new SseItem<LogServerEvent>(message);
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}
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}
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}
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});
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await _app.StartAsync(cancellation);
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}
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public async Task OnStop()
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{
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if (_app != null) await _app.DisposeAsync();
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}
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}
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