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/e77cb01b5529c137130757859f09f892dbdd2436
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Aspire.Hosting.MongoDB
MongoDB support for Aspire.
 46
Microsoft.Extensions.ServiceDiscovery
Provides extensions to HttpClient that enable service discovery based on configuration.
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HotChocolate.Fusion
Package Description
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Microsoft.Extensions.ServiceDiscovery
Provides extensions to HttpClient that enable service discovery based on configuration.
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Aspire.Hosting
Core abstractions for the Aspire application model.
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Microsoft.Extensions.ServiceDiscovery
Provides extensions to HttpClient that enable service discovery based on configuration.
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Aspire.Hosting.Nats
NATS support for .NET Aspire.
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Aspire.Hosting.Nats
NATS support for Aspire.
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Sentry.Extensions.Logging
Official Microsoft.Extensions.Logging integration for Sentry - Open-source error tracking that helps developers monitor and fix crashes in real time.
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MongoDB support for .NET Aspire.
 39
prometheus-net
.NET client library for the Prometheus monitoring and alerting system
 39
Microsoft.Extensions.ServiceDiscovery
Provides extensions to HttpClient that enable service discovery based on configuration.
 39
Aspire.Hosting.SqlServer
Microsoft SQL Server support for Aspire.
 39
Microsoft.Extensions.ServiceDiscovery
Provides extensions to HttpClient that enable service discovery based on configuration.
 38
Aspire.Hosting
Core abstractions for the Aspire application model.
 38
Aspire.Hosting.Nats
NATS support for Aspire.
 38
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/f6b3a5da75eb405046889a5447ec9b14cc29d285
 38
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/aspnet/HttpClientFactory/tree/6619149a5d84bd0b60abf3c3f2abc7b334426fa1
 38

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