C# HttpClient 多并发请求4原则

  1. Use a single instance of HttpClient.
private static readonly HttpClient httpClient = new HttpClient();
  1. Define the max concurrent requests per URL.
ServicePointManager.FindServicePoint(new Uri("http://abc.com")).ConnectionLimit = 512;
  1. Avoid port exhaustion – Don’t use HttpClient as a request queue.
  2. Only use DefaultRequestHeaders for headers that don’t change.
using (var request = new HttpRequestMessage(HttpMethod.Get, GetRandomNumberUrl))
{
    request.Headers.Authorization = new AuthenticationHeaderValue("Bearer", Token);
    var response = await HttpClient.SendAsync(request);
    response.EnsureSuccessStatusCode();
    return await response.Content.ReadAsStringAsync();
}
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