How to add Middleware in Azure HttpTrigger Functions (in-process function app) (Microsoft.NET.Sdk.Functions) in .net

KushalSeth

I found one sample on Stackoverflow (How to insert a middleware in Azure Durable Functions), but it also just talks about Isolated and Duarable Trigger functions. I want to add middlelayer in Azure HttpTrigger (Microsoft.NET.Sdk.Functions) Functions in .net

I am creating a project in .Net 6. This project will have HttpTrigger type of Azure functions.

When I created the default project from Visual Studio Azure function template, it has just created a simple function file and project without startup and Program.cs.

I can define other layers like data layer, business layer, etc. but the problem I am facing is:

How to add Middleware layer in Azure Functions (Microsoft.NET.Sdk.Functions) application?

One solution I feel might be we can add a program.cs file to the project which will have a main method? My doubt is can we add Program.cs file to this project, what could be the implications?

Or is their a way to use Startup.cs to configure middlewares?

Why this doubt of adding Program.cs file came to my mind is because, all the online examples I am seeing is for Isolated Azure Function. and their is no reference of HttpTrigger function, so is it correct to add a program.cs to HttpTrigger function project.

I have already added Startup.cs for dependency Injection.

Moho

The Azure Functions application must use the isolated process, in which case you use the HostBulder.AddMiddleware<T> method to add middleware when configuring the function worker:

var host = new HostBuilder()
    .ConfigureFunctionsWorkerDefaults( builder =>
    {
        builder.AddApplicationInsights()
            .AddApplicationInsightsLogger()

            .UseMiddleware<YourMiddleweare>()
    } )
    .ConfigureServices( services =>
    {
        ... add services to DI container here ...
    }
    .Build();

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edited at2023-09-20

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VS2019 cannot load the project due to missing NuGet Microsoft.NET.Sdk.Functions package, but cannot add this package either

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How to add Middleware in Azure HttpTrigger Functions (in-process function app) (Microsoft.NET.Sdk.Functions) in .net

How to add Middleware in Azure HttpTrigger Functions (in-process function app) (Microsoft.NET.Sdk.Functions) in .net

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