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C#通过httpclient调用https请求时，报错

错误信息为：The remote certificate is invalid according to the validation procedure

该错误是由于使用httpclient访问不合法的https站点导致出现的异常。

处理代码如下

public static string HttpPostWithToken(string url, string jsonStr, string token, int timeout = 15)
{string info = "";try{var handler = new HttpClientHandler() { };handler.ServerCertificateCustomValidationCallback += (sender, cert, chain, sslPolicyErrors) => { return true; };handler.SslProtocols = SslProtocols.None;HttpClient httpClient = new HttpClient(handler) { Timeout = TimeSpan.FromSeconds(timeout) };var message = new HttpRequestMessage(HttpMethod.Post, url);httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("AU",token);if (!string.IsNullOrEmpty(jsonStr)){message.Content = new StringContent(jsonStr, Encoding.UTF8, "application/json");}HttpResponseMessage response = httpClient.SendAsync(message).Result;info = response.Content.ReadAsStringAsync().Result;}catch (Exception e){log.Error(string.Format("请求POST接口失败，URL={0},Error={1},Param={2}", url, JsonConvert.SerializeObject(e), jsonStr));}return info;
}

引用：https://blog.csdn.net/u013667796/article/details/130442415