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FunctionContextHttpRequestExtensions.cs
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FunctionContextHttpRequestExtensions.cs
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// Copyright (c) .NET Foundation. All rights reserved.
// Licensed under the MIT License. See License.txt in the project root for license information.
using System.Linq;
using System.Threading.Tasks;
using Microsoft.Azure.Functions.Worker.Http;
namespace Microsoft.Azure.Functions.Worker
{
/// <summary>
/// FunctionContext extensions for http trigger function invocations.
/// </summary>
public static class FunctionContextHttpRequestExtensions
{
private const string HttpBindingType = "http";
/// <summary>
/// Gets the <see cref="HttpRequestData"/> instance if the invocation is for an http trigger.
/// </summary>
/// <param name="context">The FunctionContext instance.</param>
/// <returns>HttpRequestData instance if the invocation is http, else null</returns>
public static async ValueTask<HttpRequestData?> GetHttpRequestDataAsync(this FunctionContext context)
{
var httpTriggerBinding = context.FunctionDefinition.InputBindings.Values
.FirstOrDefault(a => a.Type == "httpTrigger");
if (httpTriggerBinding != null)
{
var bindingResult = await context.BindInputAsync<HttpRequestData>(httpTriggerBinding);
return bindingResult.Value;
}
return default;
}
/// <summary>
/// Gets the <see cref="HttpResponseData"/> instance if the invocation is for an http trigger.
/// </summary>
/// <param name="context">The FunctionContext instance.</param>
/// <returns>HttpResponseData instance if the invocation is http, else null</returns>
public static HttpResponseData? GetHttpResponseData(this FunctionContext context)
{
var httpInvocationResult = context.GetInvocationResult();
if (httpInvocationResult.Value is HttpResponseData responseData)
{
return responseData;
}
// see output binding entries have a property of type HttpResponseData;
var httpOutputBinding = context.GetOutputBindings<HttpResponseData>().FirstOrDefault(a => a.BindingType == HttpBindingType);
return httpOutputBinding?.Value;
}
}
}