Sitesucker retry 404 errors7/5/2023 ![]() ![]() Public class HttpTransientErrorDetectionStrategy : ITransientErrorDetectionStrategy / This class is responsible for deciding whether the response was an intermittent Return new RetryPolicy(strategy, exponentialBackoff) The transient fault application block provides three retry policies Public static RetryPolicy MakeHttpRetryPolicy() / Retry Policy = Error Detection Strategy + Retry Strategy Var result = client.SendAsync(httpRequestMessage).Result.Content HttpClient client = new HttpClient(handler) Var url = " var httpRequestMessage = new HttpRequestMessage(HttpMethod.Get, url) Visit refer to KARTHIKEYAN VIJAYAKUMAR post. You also refer to Building a Transient Retry Handler for the. Public HttpRetryMessageHandler(HttpClientHandler handler) : base(handler) ", i, ex) ![]() public class HttpRetryMessageHandler : DelegatingHandler It also retries if a HttpRequestException or TaskCanceledException is thrown due to a timeout. This implementation uses Polly to retry with an exponential back-off so that the next retry takes place in an exponentially longer time after the previous one. X => x.WaitAndRetryAsync(3, retryAttempt => TimeSpan.FromSeconds(Math.Pow(3, retryAttempt))) Īlso, consider reading my blog post "Optimally Configuring HttpClientFactory". ![]() Failed requests will retry with an exponential back-off so that the next retry takes place in an exponentially longer time after the previous one: services Here UnreliableEndpointCallerService is a class which accepts a HttpClient in its constructor. MyResult = client.PostAsync(yourUri, yourHttpContent).Result ĪSP.NET Core 2.1 added support for Polly directly. Using (var client = new HttpClient(new RetryHandler(new HttpClientHandler()))) ![]() Consider abstracting this construction to a factory or IoC container Public void FetchSomeThingsSynchronously() Response = await base.SendAsync(request, cancellationToken) Public RetryHandler(HttpMessageHandler innerHandler) probably not the most user friendly way you could respond to "the Strongly consider limiting the number of retries - "retry forever" is For example: public class RetryHandler : DelegatingHandler Instead of implementing retry functionality that wraps the HttpClient, consider constructing the HttpClient with a HttpMessageHandler that performs the retry logic internally. Is there anyway to duplicate an HttpContent Object or reuse it? End of inner exception stack trace -Īt .ThrowIfExceptional(Boolean includeTaskCanceledExceptions)Īt `1.GetResultCore(Boolean waitCompletionNotification)Īt `1.get_Result()Īt Submission#8.ExecuteWithRetry(String url, HttpContent content) Object name: ''.Īt .CheckDisposed()Īt .CopyToAsync(Stream stream, TransportContext context)Īt .GetRequestStreamCallback(IAsyncResult ar) > System.ObjectDisposedException: Cannot access a disposed object. It yields this exception System.AggregateException: One or more errors occurred. (Obviously I don't try indefinitely but the code above is essentially what i want). ĮxecuteWithRetry("" /*invalid url*/, new StringContent("Hello World")) Works with no exception if first request is successfulĮxecuteWithRetry("" /*valid url*/, new StringContent("Hello World")) Result = client.PostAsync(url, content).Result public HttpResponseMessage ExecuteWithRetry(string url, HttpContent content) Is there anyway to copy or duplicate the HttpContent Object so that I can issue multiple requests. However I get exceptions saying that HttpContent Object is disposed after issuing the request. I am building a function that given an HttpContent Object, will issues request and retry on failure. ![]()
0 Comments
Leave a Reply. |