c# - 将 HttpClientHandler 添加到 HttpClient 全局静态变量

Question

有人可以帮助我吗？如何将 HttpClientHanlder 添加到 HttpClient 全局变量中？有人说我做错了总是为每个请求创建一个新的 httpclient。

如果我这样尝试：

   //global variable
   // the handler isn't working
    private static HttpClient client = new HttpClient(addHandlers());
    
        private static HttpClientHandler addHandlers()
        {
            return new HttpClientHandler()
            {
                UseProxy = Proxy.IsUseProxy ? true : false,
                Proxy = Proxy.IsUseProxy ? new WebProxy($"{Proxy.ProxyHost}:{Proxy.ProxyPort}") : null,
                ServerCertificateCustomValidationCallback = (sender, cert, chain, sslPolicyErrors) => { return true; },
                // SslProtocols = SslProtocols.Tls12 | SslProtocols.Tls11 | SslProtocols.Tls
            };
        }

在这里我提出我的要求

   public static async Task<JsonDocument> ParseJsonData(string api, CancellationToken ct)
    {
        client = new HttpClient(addHandlers()); //this is might my wrong doing? re-creating every request.
        var uri = new Uri(api, UriKind.Absolute);
      
        using (var request = new HttpRequestMessage(HttpMethod.Get, uri))
        {
           /// etc..
        }
    }

更新修复：

private static HttpClientHandler addHandlers = new HttpClientHandler
    {
        UseProxy = Proxy.UseProxy,
        Proxy = Proxy.UseProxy ? new WebProxy($"{Proxy.ProxyHost}:{Proxy.ProxyPort}") : null,
        ServerCertificateCustomValidationCallback = (sender, cert, chain, sslPolicyErrors) => { return true; }
    };

    private static HttpClient client = new HttpClient(addHandlers);

标签： c#

Answer 1

private static HttpClient = new HttpClient(addHandlers());

这不是有效的代码。您实际上需要为静态字段命名：

private static HttpClient client = new HttpClient(addHandlers());