在.NET核心的HttpClient中通过DelegatingHandler记录所有标头

public class LoggingHandler : DelegatingHandler
{
    protected override async Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
    {
        // 记录请求标头
        Console.WriteLine("Request Headers:");
        foreach (var header in request.Headers)
        {
            Console.WriteLine($"{header.Key}: {string.Join(",", header.Value)}");
        }

        // 发送请求并获取响应
        var response = await base.SendAsync(request, cancellationToken);

        // 记录响应标头
        Console.WriteLine("Response Headers:");
        foreach (var header in response.Headers)
        {
            Console.WriteLine($"{header.Key}: {string.Join(",", header.Value)}");
        }

        return response;
    }
}

var httpClient = new HttpClient(new LoggingHandler());