Microsoft.Extensions.Http 9.0.0-preview.5.24306.7

About

Microsoft.Extensions.Http package provides AddHttpClient extension methods for IServiceCollection, IHttpClientFactory interface and its default implementation. This provides the ability to set up named HttpClient configurations in a DI container and later retrieve them via an injected IHttpClientFactory instance.

Key Features

  • The package allows to fluently set up multiple HttpClient configurations for applications that use DI via AddHttpClient extension method.
  • HttpClientFactory caches HttpMessageHandler instances per configuration name, which allows to reuse resources between HttpClient instances to avoid port exhaustion.
  • HttpClientFactory manages lifetime of HttpMessageHandler instances and recycles connections to track DNS changes.

How to Use

Note that lifetime management of HttpClient instances created by HttpClientFactory is completely different from instances created manually. The strategies are to use either short-lived clients created by HttpClientFactory or long-lived clients with PooledConnectionLifetime set up. For more information, see the HttpClient lifetime management section in the conceptual docs and Guidelines for using HTTP clients.

Configuring HttpClient

builder.Services.AddHttpClient("foo"); // adding an HttpClient named "foo" with a default configuration

builder.Services.AddHttpClient("example", c => c.BaseAddress = new Uri("https://www.example.com")) // configuring HttpClient itself
    .AddHttpMessageHandler<MyAuthHandler>() // adding additional delegating handlers to form a message handler chain
    .ConfigurePrimaryHttpMessageHandler(b => new HttpClientHandler() { AllowAutoRedirect = false }) // configuring primary handler
    .SetHandlerLifetime(TimeSpan.FromMinutes(30)); // changing the handler recycling interval

Using the configured HttpClient

public class MyService
{
    public MyService(IHttpClientFactory httpClientFactory)
    {
        _httpClientFactory = httpClientFactory; // injecting the factory
    }

    private Task<string> GetExampleAsync(Uri uri, CancellationToken ct)
    {
        HttpClient exampleClient = _httpClientFactory.CreateClient("example"); // creating the client for the specified name
        return exampleClient.GetStringAsync(uri, ct); // using the client
    }
}

Main Types

The main types provided by this library are:

  • IHttpClientFactory
  • IHttpMessageHandlerFactory
  • HttpClientFactoryServiceCollectionExtensions

Additional Documentation

Feedback & Contributing

Microsoft.Extensions.Http is released as open source under the MIT license. Bug reports and contributions are welcome at the GitHub repository.

Showing the top 20 packages that depend on Microsoft.Extensions.Http.

Packages Downloads
Microsoft.Extensions.Http.Polly
The HttpClient factory is a pattern for configuring and retrieving named HttpClients in a composable way. This package integrates IHttpClientFactory with the Polly library, to add transient-fault-handling and resiliency through fluent policies such as Retry, Circuit Breaker, Timeout, Bulkhead Isolation, and Fallback. This package was built from the source code at https://github.com/dotnet/aspnetcore/tree/954f61dd38b33caa2b736c73530bd5a294174437
 155
Microsoft.Extensions.Http.Polly
The HttpClient factory is a pattern for configuring and retrieving named HttpClients in a composable way. This package integrates IHttpClientFactory with the Polly library, to add transient-fault-handling and resiliency through fluent policies such as Retry, Circuit Breaker, Timeout, Bulkhead Isolation, and Fallback. This package was built from the source code at https://github.com/dotnet/aspnetcore/tree/b8139c5ee58f1708b0e3368a1b241400edd6cbc4
 143
Microsoft.Extensions.Http.Polly
The HttpClient factory is a pattern for configuring and retrieving named HttpClients in a composable way. This package integrates IHttpClientFactory with the Polly library, to add transient-fault-handling and resiliency through fluent policies such as Retry, Circuit Breaker, Timeout, Bulkhead Isolation, and Fallback. This package was built from the source code at https://github.com/dotnet/aspnetcore/tree/2f1db20456007c9515068a35a65afdf99af70bc6
 75
Microsoft.Identity.Web
This package enables ASP.NET Core web apps and web APIs to use the Microsoft identity platform (formerly Azure AD v2.0). This package is specifically used for web applications, which sign-in users, and protected web APIs, which optionally call downstream web APIs.
 62
Microsoft.Identity.Web.TokenAcquisition
Implementation for higher level API for confidential client applications (ASP.NET Core and SDK/.NET).
 60
Microsoft.Identity.Web
This package enables ASP.NET Core web apps and web APIs to use the Microsoft identity platform (formerly Azure AD v2.0). This package is specifically used for web applications, which sign-in users, and protected web APIs, which optionally call downstream web APIs.
 59
Microsoft.Identity.Web.TokenAcquisition
Implementation for higher level API for confidential client applications (ASP.NET Core and SDK/.NET).
 58
Microsoft.Extensions.Http.Polly
The HttpClient factory is a pattern for configuring and retrieving named HttpClients in a composable way. This package integrates IHttpClientFactory with the Polly library, to add transient-fault-handling and resiliency through fluent policies such as Retry, Circuit Breaker, Timeout, Bulkhead Isolation, and Fallback. This package was built from the source code at https://github.com/dotnet/aspnetcore/tree/88ec3bc3f37e76fbcc932a25f9f0c1c29fe2b343
 56
Microsoft.Extensions.Http.Polly
The HttpClient factory is a pattern for configuring and retrieving named HttpClients in a composable way. This package integrates IHttpClientFactory with the Polly library, to add transient-fault-handling and resiliency through fluent policies such as Retry, Circuit Breaker, Timeout, Bulkhead Isolation, and Fallback. This package was built from the source code at https://github.com/dotnet/aspnetcore/tree/47576478939fdd59b4400ad135f47938af486ab3
 56
Microsoft.Identity.Web.TokenAcquisition
Implementation for higher level API for confidential client applications (ASP.NET Core and SDK/.NET).
 49
Microsoft.Identity.Web
This package enables ASP.NET Core web apps and web APIs to use the Microsoft identity platform (formerly Azure AD v2.0). This package is specifically used for web applications, which sign-in users, and protected web APIs, which optionally call downstream web APIs.
 49
Microsoft.Extensions.Http.Polly
The HttpClient factory is a pattern for configuring and retrieving named HttpClients in a composable way. This package integrates IHttpClientFactory with the Polly library, to add transient-fault-handling and resiliency through fluent policies such as Retry, Circuit Breaker, Timeout, Bulkhead Isolation, and Fallback. This package was built from the source code at https://github.com/dotnet/aspnetcore/tree/c2a442982e736e17ae6bcadbfd8ccba278ee1be6
 48
Microsoft.Identity.Web.TokenAcquisition
Implementation for higher level API for confidential client applications (ASP.NET Core and SDK/.NET).
 47
Microsoft.Identity.Web
This package enables ASP.NET Core web apps and web APIs to use the Microsoft identity platform (formerly Azure AD v2.0). This package is specifically used for web applications, which sign-in users, and protected web APIs, which optionally call downstream web APIs.
 45
Microsoft.Identity.Web.TokenAcquisition
Implementation for higher level API for confidential client applications (ASP.NET Core and SDK/.NET).
 42
Microsoft.Identity.Web
This package enables ASP.NET Core web apps and web APIs to use the Microsoft identity platform (formerly Azure AD v2.0). This package is specifically used for web applications, which sign-in users, and protected web APIs, which optionally call downstream web APIs.
 41
Microsoft.Extensions.Http.Polly
The HttpClient factory is a pattern for configuring and retrieving named HttpClients in a composable way. This package integrates IHttpClientFactory with the Polly library, to add transient-fault-handling and resiliency through fluent policies such as Retry, Circuit Breaker, Timeout, Bulkhead Isolation, and Fallback. This package was built from the source code at https://github.com/dotnet/aspnetcore/tree/8486d31e24f30e3fa1809a95699a0adc16f448d7
 40
Microsoft.Identity.Web
This package enables ASP.NET Core web apps and web APIs to use the Microsoft identity platform (formerly Azure AD v2.0). This package is specifically used for web applications, which sign-in users, and protected web APIs, which optionally call downstream web APIs.
 37
Microsoft.Extensions.Http.Polly
The HttpClient factory is a pattern for configuring and retrieving named HttpClients in a composable way. This package integrates IHttpClientFactory with the Polly library, to add transient-fault-handling and resiliency through fluent policies such as Retry, Circuit Breaker, Timeout, Bulkhead Isolation, and Fallback. This package was built from the source code at https://github.com/dotnet/aspnetcore/tree/c9e3996173cec136bc2e9f3b4ec45f2a323b1d63
 35
Microsoft.Identity.Web
This package enables ASP.NET Core web apps and web APIs to use the Microsoft identity platform (formerly Azure AD v2.0). This package is specifically used for web applications, which sign-in users, and protected web APIs, which optionally call downstream web APIs.
 34

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