.net core项目中soapclient的超时设置方法

Question

我必须在 .Net Core 2.0 项目中使用 SOAP 服务。我按照以下 link 中的描述添加了服务参考：(Missing link, 404)

某些方法的服务工作正常。但是，有些方法需要很长时间（由于操作服务正在执行），在这种情况下程序会抛出异常："System.Net.Http.WinHttpException: The operation timed out"

我尝试设置超时值但没有效果。

MyService.MyServiceSoapClient Pr = 
    new MyService.MyServiceSoapClient(
            new MyService.MyServiceSoapClient.EndpointConfiguration());

Pr.InnerChannel.OperationTimeout = new TimeSpan(0, 10, 0);

我还检查了以下 link，其中有关于 .Net Core 中 wcf/soap 服务的相关问题：GitHub: dotnet/wcf

但目前还没有解决办法。知道如何解决这个问题吗？

Answer 1

好的，如果有人遇到同样的问题，我会发布我找到的解决方案。看来其他人也遇到过这个问题并提出问题here

据我所知，这是 .Net Core 2.0 的一般错误，如果请求持续时间超过 30 秒，就会发生。

上面可以看到link，他们贴出了解决方案here. It worked for me. Solution requires to make a fake request to service each time before making a real request so timeout settings can be changed. To avoid that I can suggest you to catch "CommunicationException", and apply the solution in that catch. So you make extra calls only if you really need to. I am copying the code, just in case link dies (all credits for code to https://github.com/mconnew/)

   static void Main(string[] args)
    {
        var client = new SimpleServiceClient();
        client.OpenAsync().GetAwaiter().GetResult();
        client.DelayedResponseAsync(2000).GetAwaiter().GetResult();
        var channel = client.InnerChannel;
        var httpChannelFactory = client.InnerChannel.GetProperty<IChannelFactory>();
        var cacheField = httpChannelFactory.GetType().GetField("_httpClientCache", BindingFlags.NonPublic | BindingFlags.Instance);
        var httpClientCache = cacheField.GetValue(httpChannelFactory);
        var cacheDictionaryField = httpClientCache.GetType().GetField("_items", BindingFlags.NonPublic | BindingFlags.Instance);

        IDictionary cacheDictionary = (IDictionary)cacheDictionaryField.GetValue(httpClientCache);
        foreach(var cacheKey in cacheDictionary.Keys)
        {
            var cacheEntry = cacheDictionary[cacheKey];
            var valueField = cacheEntry.GetType().GetField("value", BindingFlags.NonPublic | BindingFlags.Instance);
            HttpClient httpClient = (HttpClient)valueField.GetValue(cacheEntry);
            FixHttpClient(httpClient);
        }

        client.DelayedResponseAsync(50000).GetAwaiter().GetResult();
        Console.WriteLine("Done");
        Console.ReadLine();
    }
    private static void FixHttpClient(HttpClient httpClient)
    {
        var handlerField = typeof(HttpMessageInvoker).GetField("_handler", BindingFlags.NonPublic | BindingFlags.Instance);
        DelegatingHandler delegatingHandler = (DelegatingHandler)handlerField.GetValue(httpClient); // Should be of type ServiceModelHttpMessageHandler
        WinHttpHandler winHttpHandler = (WinHttpHandler)delegatingHandler.InnerHandler;
        WinHttpHandler newHandler = new WinHttpHandler();
        newHandler.ServerCredentials = winHttpHandler.ServerCredentials;
        newHandler.CookieUsePolicy = winHttpHandler.CookieUsePolicy;
        newHandler.ClientCertificates.AddRange(winHttpHandler.ClientCertificates);
        newHandler.ServerCertificateValidationCallback = winHttpHandler.ServerCertificateValidationCallback;
        newHandler.Proxy = winHttpHandler.Proxy;
        newHandler.AutomaticDecompression = winHttpHandler.AutomaticDecompression;
        newHandler.PreAuthenticate = winHttpHandler.PreAuthenticate;
        newHandler.CookieContainer = winHttpHandler.CookieContainer;

        // Fix the timeouts
        newHandler.ReceiveHeadersTimeout = Timeout.InfiniteTimeSpan;
        newHandler.ReceiveDataTimeout = Timeout.InfiniteTimeSpan;
        newHandler.SendTimeout = Timeout.InfiniteTimeSpan;

        var servicemodelHttpHandlerInnerHandlerField = delegatingHandler.GetType().GetField("_innerHandler", BindingFlags.NonPublic | BindingFlags.Instance);
        servicemodelHttpHandlerInnerHandlerField.SetValue(delegatingHandler, newHandler);
        var delegatingHandlerInnerHandlerField = typeof(DelegatingHandler).GetField("_innerHandler", BindingFlags.NonPublic | BindingFlags.Instance);
        delegatingHandlerInnerHandlerField.SetValue(delegatingHandler, newHandler);}