asp.net Core HttpClient 出现Cannot access a disposed object. Object name: 'SocketsHttpHandler' 的问题。

时间:2021-01-13 05:02:39

ASP.NET Core 部署在Centos 中 偶尔出现

One or more errors occurred. (Cannot access a disposed object.Object name: 'SocketsHttpHandler'.)

之前的写法如下:

  var httpclientHandler = new HttpClientHandler();
httpclientHandler.ServerCertificateCustomValidationCallback = (message, cert, chain, error) => true;
httpclientHandler.AutomaticDecompression = DecompressionMethods.GZip;
httpclientHandler.MaxRequestContentBufferSize = ;
services.AddHttpClient("tmkhttp", option =>
{
option.DefaultRequestHeaders.Add("User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3626.121 Safari/537.36");
option.Timeout = new TimeSpan(, , );
}).ConfigurePrimaryHttpMessageHandler(() =>
{
return httpclientHandler;
});

看提示应该是SocketsHttpHandler 资源释放了,没重新实例化。

在github上看到一个答案 说  ConfigurePrimaryHttpMessageHandler 里面不要直接return HttpClientHandler,要重新new 一下

改完后的如下:

 services.AddHttpClient("tmkhttp", option =>
{
option.DefaultRequestHeaders.Add("User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3626.121 Safari/537.36");
option.Timeout = new TimeSpan(, , );
}).ConfigurePrimaryHttpMessageHandler(() =>
{
return new HttpClientHandler()
{
MaxRequestContentBufferSize = ,
AutomaticDecompression = DecompressionMethods.GZip ,
ServerCertificateCustomValidationCallback = (message, cert, chain, error) => true
}; });