71 lines
2.3 KiB
C#
71 lines
2.3 KiB
C#
using System.Net;
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using Elsa.Workflows.Core.Attributes;
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using Elsa.Workflows.Core.Models;
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using Microsoft.AspNetCore.Http;
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namespace Elsa.Http;
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/// <summary>
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/// Write a response to the current HTTP response object.
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/// </summary>
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[Activity("Elsa", "HTTP", "Write a response to the current HTTP response object.", DisplayName = "HTTP Response")]
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public class WriteHttpResponse : Activity
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{
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/// <summary>
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/// The status code to return.
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/// </summary>
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[Input(DefaultValue = HttpStatusCode.OK, Description = "The status code to return.")]
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public Input<HttpStatusCode> StatusCode { get; set; } = new(HttpStatusCode.OK);
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/// <summary>
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/// The content to write back.
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/// </summary>
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[Input(Description = "The content to write back.")]
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public Input<string?> Content { get; set; } = new("");
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/// <inheritdoc />
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protected override async ValueTask ExecuteAsync(ActivityExecutionContext context)
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{
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var httpContextAccessor = context.GetRequiredService<IHttpContextAccessor>();
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var httpContext = httpContextAccessor.HttpContext;
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if (httpContext == null)
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{
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// We're executing in a non-HTTP context (e.g. in a virtual actor).
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// Create a bookmark to allow the invoker to export the state and resume execution from there.
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context.CreateBookmark(OnResumeAsync);
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return;
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}
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var response = httpContext.Response;
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response.StatusCode = (int)context.Get(StatusCode);
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var content = context.Get(Content);
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if (content != null)
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await response.WriteAsync(content, context.CancellationToken);
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}
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private async ValueTask OnResumeAsync(ActivityExecutionContext context)
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{
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var httpContextAccessor = context.GetRequiredService<IHttpContextAccessor>();
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var httpContext = httpContextAccessor.HttpContext;
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if (httpContext == null)
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{
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// We're not in an HTTP context, so let's fail.
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throw new Exception("Cannot execute in a non-HTTP context");
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}
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var response = httpContext.Response;
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response.StatusCode = (int)context.Get(StatusCode);
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var content = context.Get(Content);
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if (content != null)
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await response.WriteAsync(content, context.CancellationToken);
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}
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} |