Inject ILogger when registering HttpClient in Asp.Net Core 5.0-CodePudding

In Asp.Net Core when you register a custom service, like:

services.AddScoped<ISomeService, SomeService>();

Then, out of the box you can access the Microsoft ILogger from the contractor of SomeService class.

But if you register a custom HttpClient, like:

            services.AddHttpClient<ISomeHttpClient, SomeHttpClient>(client =>
            {
                client.BaseAddress = new Uri(Configuration["Url"]);
                client.DefaultRequestHeaders.Add("Accept", "application/json");
            });

Then, you cannot access the Microsoft ILogger from the constructor of SomeHttpClient. I get the error:

Unable to resolve service for type 'Microsoft.Extensions.Logging.ILogger'

I am aware that the framework is already logging HttpRequest activity for you. What I would like to do is to log the body of every single request in case the StatusCode is not successful.

Any ideas how to achieve this?

CodePudding user response：

Can you use ILogger<SomeHttpClient> logger than using ILogger directly?

Here is some code which does it and working properly.

public class GitHubService
{
    private readonly HttpClient _client;
    private readonly ILogger<GitHubService> _logger;

    public GitHubService(HttpClient client, ILogger<GitHubService> logger)
    {
        client.BaseAddress = new Uri("https://api.github.com/");
        // GitHub API versioning
        client.DefaultRequestHeaders.Add("Accept",
            "application/vnd.github.v3 json");
        // GitHub requires a user-agent
        client.DefaultRequestHeaders.Add("User-Agent",
            "HttpClientFactory-Sample");

        _client = client;
        _logger = logger;
    }

    public async Task<IEnumerable<string>> GetAspNetDocsIssues()
    {
        _logger.LogInformation("Getting issues from GitHub");
        return await _client.GetFromJsonAsync<IEnumerable<string>>(
            "/repos/aspnet/AspNetCore.Docs/issues?state=open&sort=created&direction=desc");
    }
}

Source code : https://docs.microsoft.com/en-us/aspnet/core/fundamentals/http-requests?view=aspnetcore-5.0