GetAsync导致超时问题

本文关键字：问题 超时 GetAsync | 更新日期: 2023-09-27 18:05:10

我有下面的代码，它在获取数据时导致问题

 var result = client.GetAsync(requestUri).Result;

如果我从浏览器中点击requestUri，那么它可以正常工作。但从上面的代码来看，它给出了下面的错误。

错误：

出现一个或多个错误。发送请求时出错。基础连接已关闭：发送时发生意外错误。身份验证失败，因为远程参与方已关闭传输流。

堆栈跟踪1:

位于System.Threading.Tasks.Task 1.GetResultCore(Boolean waitCompletionNotification) at foo(String resultUrl) at dooo(String param, String resultUrl) at foo.<>c__DisplayClass2.<Product>b__0(String x, String y) at foo[T](Func 3 fn(处的System.Net.HttpWebRequest.EndGetResponse(IAsyncResult asyncResult(在System.Net.Http.HttpClientHandler.GetResponseCallback(IAsyncResult ar(上，在System.Net.TlsStream.EndWrite(IAsyncResult asyncResult(上在System.Net.ConnectStream.WriteHeadersCallback(IAsyncResult ar(

堆栈跟踪2

位于System.Threading.Tasks.Task 1.GetResultCore(Boolean waitCompletionNotification) at Foo1(String resultUrl) at Foo2(String param, String resultUrl) at Foo3.<>c__DisplayClass2.<Product>b__0(String x, String y) at Foo4(Func 3 fn(的System.Net.HttpWebRequest.EndGetResponse(IAsyncResult asyncResult(在System.Net.Http.HttpClientHandler.GetResponseCallback(IAsyncResult ar(上，在System.Net.TlsStream.EndWrite(IAsyncResult asyncResult(上位于System.Net.ConnectStream.WriteHeadersCallback(IAsyncResult ar(位于System.Web.Http.Controllers.ApiControllerActionInvoker.d_0.MoveNext((---从引发异常的前一位置开始的堆栈结尾跟踪---在System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(任务任务(位于System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(任务任务(位于System.Runtime.CompilerServices.TaskAwaiter 1.GetResult() at System.Web.Http.Filters.ActionFilterAttribute.<CallOnActionExecutedAsync>d__5.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at System.Web.Http.Filters.ActionFilterAttribute.<CallOnActionExecutedAsync>d__5.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Runtime.CompilerServices.TaskAwaiter 1.GetResult((位于System.Web.Http.Filters.ActionFilterAttribute.d_0.MoveNext((---从引发异常的前一位置开始的堆栈结尾跟踪---在System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(任务任务(位于System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(任务任务(位于System.Runtime.CompilerServices.TaskAwaiter`1.GetResult((位于System.Web.Http.Filters.ActionFilterAttribute.d_5.MoveNext((

我也试过了一次失败的电话，但没有成功。在这种情况下，我们可以增加get请求的请求超时吗。

等待代码我尝试

var result = await client.GetAsync(requestUri);
                if (!result.IsSuccessStatusCode) throw new Exception(string.Format("Unable to receive data from Uri: {0}", uri.ToString()));
                // write the results
                using (var write = File.Create(filePath))
                using (var read = await result.Content.ReadAsStreamAsync())
                {
                    read.Seek(0, SeekOrigin.Begin);
                    read.CopyTo(write);
                }

GetAsync导致超时问题

如果响应是长时间的，并且您想增加超时，只需在客户端上设置：https://msdn.microsoft.com/en-us/library/system.net.http.httpclient.timeout(v=vs.118(.aspx

同样从课程本身来看：

TimeSpan defaultTimeout = TimeSpan.FromSeconds(100.0);
TimeSpan maxTimeout = TimeSpan.FromMilliseconds((double) int.MaxValue);
TimeSpan infiniteTimeout = TimeSpan.FromMilliseconds(-1.0);
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