Question

我遇到了一个问题，每隔一段时间（也许每周一次），我注意到没有发出HttpClient的请求。

该过程每5s连续24/5发出两个请求。第一个是POST，第二个是GET。该故障仅在第二个请求上发生，并且每次此周期运行（即每5s）重复一次。

在每次调用时，c＃脚本都使用一个IHttpClientFactory（使用Microsoft.Extensions.Http v2.1.0），并使用一个命名实例来检索相关的客户端。

var httpClient = HttpClientFactory.CreateClient("[named_instance]");

services.AddHttpClient("[named_instance]")
    .ConfigurePrimaryHttpMessageHandler(() =>
    {
        return new HttpClientHandler
        {
            UseCookies = false,
            UseDefaultCredentials = false
        };
    });

POST方法

var httpClient = CreateClient();

httpClient.DefaultRequestHeaders.Clear();
httpClient.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));

var body = $"[json here]";
var content = new StringContent(body, Encoding.UTF8, "application/json");

return await httpClient.PostAsync("[url_here]", content).ConfigureAwait(false);

GET方法

var httpClient = CreateClient();

httpClient.DefaultRequestHeaders.Clear();
httpClient.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
httpClient.DefaultRequestHeaders.Add("Authorization", sessionId);

return await httpClient.GetAsync("[url_here]").ConfigureAwait(false);

我已经进行了详细的日志记录（对于HttpClientFactory），并注意到了输出的差异。

工作

Calling Method1
Start processing HTTP request POST https://[url]/[method1]
Sending HTTP request POST https://[url]/[method1]
Received HTTP response after 22.4196ms - OK
End processing HTTP request after 69.3192ms - OK

Calling Method2
Start processing HTTP request GET https://[url]/[method2]
Sending HTTP request GET https://[url]/[method2]
Received HTTP response after 418.6451ms - OK
End processing HTTP request after 459.884ms - OK

错误

Calling Method1
Start processing HTTP request POST https://[url]/[method1]
Sending HTTP request POST https://[url]/[method1]
Received HTTP response after 16.8932ms - OK
End processing HTTP request after 45.3336ms - OK

Calling Method2
No HTTP request made

HttpClientFactory停止发出请求

0 个答案: