Question

任何帮助或见识将不胜感激。

我设法获得的问题是该问题与HTTPS有关，因为我在发布到HTTP端点时能够收到200的回扣，类似于以下线程here

当前很难解决以下问题：

我将AndroidClientHandler HttpClient实现以及NativeTLS 1.2+用于SSL / TLS实现

当我在自己的应用上录制了超过1分钟或超过20MB的视频时，出现以下错误： “无法访问已处置的对象。\ n对象名称： 'System.Net.Sockets.NetworkStream'。”

这是方法

    public async Task<HttpResponseMessage> UploadVideo(string endPoint)
    {
        HttpResponseMessage responseMessage = null;
        try
        {
            //Stopwatch stopWatch = new Stopwatch();

            IList<KeyValuePair<string, string>> formFields = new List<KeyValuePair<string, string>>();
            messageHandlerService = Mvx.Resolve<IMessageHandlerService>();

            //Declare a scope whereby you can use resources and once you leave the scope the resources are disposed of.
            using (StreamReader reader = pathService.GetStreamReaderByPlatform())
            {
                client = await MyHttpClient.GetClientAsync();
                client.Timeout = TimeSpan.FromSeconds(500);

                var bytes = default(byte[]);
                using (var memstream = new MemoryStream())
                {
                    reader.BaseStream.CopyTo(memstream);
                    bytes = memstream.ToArray();

                    using (var content = new MultipartFormDataContent())
                    {
                        var fileContent = new ByteArrayContent(bytes);
                        fileContent.Headers.ContentDisposition = new ContentDispositionHeaderValue("attachment")
                        {
                            FileName = ".mp4",
                        };
                        content.Add(fileContent);
                        content.Add(EncodeFields(formFields));

                        await Policy.Handle<TimeoutException>()
                          .Or<HttpRequestException>()
                          .Or<IOException>()
                          .OrResult<HttpResponseMessage>(r => httpStatusCodesToRetry.Contains(r.StatusCode))
                          .WaitAndRetryAsync
                          (retryCount: 3,
                           sleepDurationProvider: retryAttempt => TimeSpan.FromSeconds(Math.Pow(2, retryAttempt)),
                           onRetry: (ex, time) =>
                           {
                               Debug.WriteLine($"Something went wrong: {ex.Exception.Message}, retrying...");
                           }).ExecuteAsync(async () =>
                        {
                            Debug.WriteLine($"Trying to fetch remote data...");
                            responseMessage = await client.PostAsync(endPoint, content);
                            return responseMessage;
                        });
                    }
                }
            }
        }
        catch (WebException webx)
        {

            if (responseMessage == null)
            {
                responseMessage = new HttpResponseMessage();
            }

            responseMessage.StatusCode = HttpStatusCode.InternalServerError;
            responseMessage.ReasonPhrase = string.Format("RestHttpClient.SendRequest failed: {0}", webx);
        }
        catch (Exception ex)
        {
            if (responseMessage == null)
            {
                responseMessage = new HttpResponseMessage();
            }

            responseMessage.StatusCode = HttpStatusCode.InternalServerError;
            responseMessage.ReasonPhrase = string.Format("RestHttpClient.SendRequest failed: {0}", ex);
        }

        return responseMessage;
    }

下面是堆栈跟踪：

System.Net.WebConnectionStream.EndWrite（System.IAsyncResult r）[0x000b8]在<5a97d41d36694fb19855c17429527b10>：0 \ n在System.IO.Stream + <> c.b__53_1（System.IO.Stream流，系统。 IAsyncResult asyncResult）[0x00000]在（包装委托调用）System.Func

3[System.IO.Stream,System.IAsyncResult,System.Threading.Tasks.VoidTaskResult].invoke_TResult_T1_T2(System.IO.Stream,System.IAsyncResult)\n  at System.Threading.Tasks.TaskFactory

1 + FromAsyncTrimPromise 1[TResult,TInstance].Complete (TInstance thisRef, System.Func 3 [T1，T2，TResult]上为0 \ n，endMethod，System.IAsyncResult asyncResult，System .Boolean RequiresSynchronization）在：0中的[0x00000] \ n ---从上一个引发异常的位置开始的堆栈结束跟踪--- \ n在System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw（）在[0x0000c] n在System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification（System.Threading.Tasks.Task任务）[System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess（System.Threading.Tasks.Task任务）[0x0003e]中，位于：0 \ n在System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd：0 \ n中为[0x00028]（System.Threading.Tasks.Task任务）在System.Runtime.CompilerS：0 \ n中为[0x00008] ervices.ConfiguredTaskAwaitable + ConfiguredTaskAwaiter.GetResult（）在System.Net.Http.MultipartContent + d__8.MoveNext（）在<996a681f30a44cd685a4da54e11956e2>：0中的[0x00000]在\ n上的位置：0 \ n--从堆栈跟踪结束在System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw（）[0x0000c]在System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess（System.Threading.Tasks.Task任务：0 \ n中的[0x0000c] ）[0x0003e]在System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification（System.Threading.Tasks.Task任务）的[0x00028] [0x00028]在System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd（System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd（0。 Threading.Tasks.Task任务）[0x00008]在System.Runtime.CompilerServices.ConfiguredTaskAwaitable + ConfiguredTaskAwaiter.GetResult（）在：0 \ n在System.Net.Http.HttpClientHandler + d__64.MoveNext（0x00008] ）<996a681f30a44cd685a4da54e11956e2>中的[0x0036e]：0 \ n ---上一个位置的堆栈跟踪结束关于引发异常的位置--- \ n在System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess（System.Threading.Tasks.Task任务）的\ 0处，位于\\ n的System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw（）[0x0000c] [0x0003e]在System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification（System.Threading.Tasks.Task任务）处为\ 0的[0x00028]在System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd（System.Threading .Tasks.Task任务）[0x00008]在System.Runtime.CompilerServices.ConfiguredTaskAwaitable

1+ConfiguredTaskAwaiter[TResult].GetResult () [0x00000] in <f32579baafc1404fa37ba3ec1abdc0bd>:0 \n  at System.Net.Http.HttpClient+<SendAsyncWorker>d__49.MoveNext () [0x000ca] in <996a681f30a44cd685a4da54e11956e2>:0 \n--- End of stack trace from previous location where exception was thrown ---\n  at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x0000c] in <f32579baafc1404fa37ba3ec1abdc0bd>:0 \n  at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Threading.Tasks.Task task) [0x0003e] in <f32579baafc1404fa37ba3ec1abdc0bd>:0 \n  at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Threading.Tasks.Task task) [0x00028] in <f32579baafc1404fa37ba3ec1abdc0bd>:0 \n  at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd (System.Threading.Tasks.Task task) [0x00008] in <f32579baafc1404fa37ba3ec1abdc0bd>:0 \n  at System.Runtime.CompilerServices.TaskAwaiter

1处的\ n处为\ 0 …

Answer 1

我通过在Xamarin.Android的“项目构建设置”中设置一些标志来解决了该问题。

与Docs的建议相反，设置以下配置可让我使用HTTPS将文件发布到服务器。在使用本机TLS 1.2+时，大于20MB的上传会崩溃...是的，我们的服务器支持TLS 1.2

使用Httpclient的大型VIDEO文件上传在Xamarin.Android上不起作用

1 个答案: