C# Net.WebException类代码示例

 internal static void ThrowSharpBoxExceptionBasedOnNetworkErrorCode(WebRequest uploadRequest, int code, WebException e)
 {
     if (Convert.ToInt32(code) == 507)
         throw new SharpBoxException(SharpBoxErrorCodes.ErrorInsufficientDiskSpace, e, uploadRequest, null);
     else
         throw new SharpBoxException(SharpBoxErrorCodes.ErrorCreateOperationFailed, e, uploadRequest, null);
 }

        public void MediaRetryPolicyTestExecuteActionNonTransient()
        {
            MediaRetryPolicy target = new TestMediaServicesClassFactory(null).GetSaveChangesRetryPolicy();

            int exceptionCount = 2;
            int expected = 10;
            var fakeException = new WebException("test", WebExceptionStatus.RequestCanceled);

            Func<int> func = () =>
            {
                if (--exceptionCount > 0) throw fakeException;
                return expected;
            };

            try
            {
                target.ExecuteAction(func);
            }
            catch (WebException x)
            {
                Assert.AreEqual(1, exceptionCount);
                Assert.AreEqual(fakeException, x);
                throw;
            }

            Assert.Fail("Expected exception");
        }

        public static string SerializeWebException(WebException ex)
        {
            var dictionary = new Dictionary<string, string>();
            dictionary["StatusCode"] = ((int)((HttpWebResponse)(ex.Response)).StatusCode).ToString();
            Stream responseStream = ex.Response.GetResponseStream();
            if (responseStream != null)
            {
                dictionary["Body"] = StreamToString(responseStream);
                responseStream.Position = 0;

                if (ex.Response.Headers.AllKeys.Contains("WWW-Authenticate", StringComparer.OrdinalIgnoreCase))
                {
                    dictionary["WWW-AuthenticateHeader"] = ex.Response.Headers["WWW-Authenticate"];
                }
            }
            else
            {
                dictionary["Body"] = string.Empty;
            }

            using (Stream stream = new MemoryStream())
            {
                SerializeDictionary(dictionary, stream);
                stream.Seek(0, SeekOrigin.Begin);
                return EncodingHelper.Base64Encode(StreamToString(stream));
            }
        }

        private static void HandleDownloadException(string url, WebException ex, Failed failed)
        {
            StringBuilder builder = new StringBuilder();
            builder.AppendFormat("Failed to download '{0}'.", url);
            builder.Append("\r\n");

            // do we have a response...
            if (ex.Response != null)
            {
                try
                {
                    Stream stream = ex.Response.GetResponseStream();
                    if (stream == null)
                        throw new InvalidOperationException("'stream' is null.");
                    using (stream)
                    {
                        builder.Append("Response data: ");

                        // reader...
                        using (StreamReader reader = new StreamReader(stream))
                            builder.Append(reader.ReadToEnd());
                    }
                }
                catch (Exception readEx)
                {
                    builder.AppendFormat("An exception occurred when reading error data: " + readEx.Message);
                }
            }
            else
                builder.Append("(No response)");

            // defer to the context...
            failed(new InvalidOperationException(builder.ToString(), ex));
        }

        public void GetOperationTest()
        {
            var data = new OperationData { Id = "1", State = OperationState.Succeeded.ToString() };

            var dataContextMock = new Mock<IMediaDataServiceContext>();

            var fakeException = new WebException("test", WebExceptionStatus.ConnectionClosed);

            var fakeResponse = new OperationData[] { data };
            int exceptionCount = 2;

            dataContextMock.Setup((ctxt) => ctxt
                .Execute<OperationData>(It.IsAny<Uri>()))
                .Returns(() =>
                {
                    if (--exceptionCount > 0) throw fakeException;
                    return fakeResponse;
                });

            _mediaContext.MediaServicesClassFactory = new TestMediaServicesClassFactory(dataContextMock.Object);
            var actual = _mediaContext.Operations.GetOperation(data.Id);
            Assert.AreEqual(data.Id, actual.Id);

            dataContextMock.Verify((ctxt) => ctxt.Execute<OperationData>(It.IsAny<Uri>()), Times.Exactly(2));
        }

        public IAuthenticator Next(WebException ex)
        {
            // No user name provided, just throw
            if (string.IsNullOrEmpty(_user))
                return null;

            var response = (HttpWebResponse)ex.Response;
            var header = response.Headers["WWW-Authenticate"];

            if (response.StatusCode != HttpStatusCode.Unauthorized ||
                string.IsNullOrEmpty(header))
                return null;

            if (header.StartsWith("Digest ",
                StringComparison.InvariantCultureIgnoreCase))
            {
                var digest = new DigestToken(header,
                    _user, _password);

                return new DigestAuthenticator(digest);
            }

            // Probably bad username/password
            return null;
        }

 private WebException GetWebException(Stream responseStream )
 {
     var webResponse = Substitute.For<HttpWebResponse>();
     webResponse.GetResponseStream().Returns(responseStream);
     var wex = new WebException("test", null, WebExceptionStatus.UnknownError, webResponse);
     return wex; 
 }

        /// <summary>
        /// Initializes a new instance.
        /// </summary>
        /// <param name="innerException"></param>
        public SDataException(WebException innerException)
            : base(innerException.Message, innerException, innerException.Status, innerException.Response)
        {
            if (Response == null)
            {
                return;
            }

            var httpResponse = Response as HttpWebResponse;
            _statusCode = httpResponse != null ? httpResponse.StatusCode : (HttpStatusCode?) null;
            MediaType mediaType;

            if (MediaTypeNames.TryGetMediaType(Response.ContentType, out mediaType) && mediaType == MediaType.Xml)
            {
                var serializer = new XmlSerializer(typeof (Diagnosis));

                using (var stream = Response.GetResponseStream())
                {
                    try
                    {
                        _diagnosis = (Diagnosis) serializer.Deserialize(stream);
                    }
                    catch (XmlException)
                    {
                    }
                    catch (InvalidOperationException)
                    {
                    }
                }
            }
        }

        private static FeedVerificationResult HandleWebException(WebException exception, string source)
        {
            try
            {
                var httpWebResponse = (HttpWebResponse)exception.Response;
                if (ReferenceEquals(httpWebResponse, null))
                {
                    return FeedVerificationResult.Invalid;
                }

                if ((int)httpWebResponse.StatusCode == 403)
                {
                    return FeedVerificationResult.Valid;
                }

                if (exception.Status == WebExceptionStatus.ProtocolError)
                {
                    return httpWebResponse.StatusCode == HttpStatusCode.Unauthorized
                        ? FeedVerificationResult.AuthenticationRequired
                        : FeedVerificationResult.Invalid;
                }                
            }
            catch (Exception ex)
            {
                Log.Debug(ex, "Failed to verify feed '{0}'", source);
            }

            return FeedVerificationResult.Invalid;
        }

 private string extractErrorDetails(WebException ex)
 {
     string responseBody = "";
     using (WebResponse response = ex.Response)
     {
         HttpWebResponse httpResponse = (HttpWebResponse)response;
         if (httpResponse != null)
         {
             responseStatusCode = httpResponse.StatusCode;
             if (httpResponse.StatusCode == HttpStatusCode.BadRequest)
             {
                 using (Stream data = response.GetResponseStream())
                 using (var reader = new StreamReader(data))
                 {
                     responseBody = reader.ReadToEnd();
                 }
             }
         }
         if (responseBody == "")
         {
             responseBody = "{\"Exception\":\"" + ex.Message + "\"}";
         }
     }
     return responseBody;
 }

		public static bool IsNetworkUnavailableFrom(WebException e)
		{
			return IsNetworkApproximatelyUnavailable () ||
				e.Status == WebExceptionStatus.NameResolutionFailure ||
				e.Status == WebExceptionStatus.Timeout ||
				e.Status == WebExceptionStatus.ConnectFailure;
		}

        public void TestSendDeleteOperationRetry()
        {
            var data = new StreamingEndpointData { Name = "testData", Id = "1" };

            var fakeException = new WebException("test", WebExceptionStatus.ConnectionClosed);

            var dataContextMock = TestMediaServicesClassFactory.CreateSaveChangesMock(fakeException, 2, data);

            dataContextMock.Setup((ctxt) => ctxt.AttachTo("StreamingEndpoints", data));
            dataContextMock.Setup((ctxt) => ctxt.DeleteObject(data));

            _mediaContext.MediaServicesClassFactory = new TestMediaServicesClassFactory(dataContextMock.Object);

            data.SetMediaContext(_mediaContext);

            try
            {
                data.SendDeleteOperation();
            }
            catch (NotImplementedException x)
            {
                Assert.AreEqual(TestMediaDataServiceResponse.TestMediaDataServiceResponseExceptionMessage, x.Message);
            }

            dataContextMock.Verify((ctxt) => ctxt.SaveChanges(), Times.Exactly(2));
        }

        public void UploadData(byte[] data)
        {
            try
            {
                //this.m_Method = method;//this sets someone else
                request.ContentLength = data.Length;//this is my responsability to set

                this.UploadBits( request.GetRequestStream(), null,data, null, null);
                
                //buffer2 = this.DownloadBits(request, null, null, null);
            }
            catch (Exception exception)
            {
                if (((exception is ThreadAbortException) || (exception is StackOverflowException)) || (exception is OutOfMemoryException))
                {
                    throw;
                }
                if (!(exception is WebException) && !(exception is SecurityException))
                {
                    exception = new WebException("Curl", exception);
                }
                AbortRequest();
                throw exception;
            }
        }

        private void AppendHttpResponseDetails(StringBuilder stringBuilder, WebException exception)
        {
            var httpWebResponse = exception.Response as HttpWebResponse;
              if (httpWebResponse == null)
            return;

              try
              {
            stringBuilder.AppendFormat ("StatusCode: {0}", httpWebResponse.StatusCode);
            stringBuilder.AppendLine();

            stringBuilder.AppendFormat ("StatusDescription: {0}", httpWebResponse.StatusDescription);
            stringBuilder.AppendLine();

            try
            {
              using (var reader = new StreamReader (httpWebResponse.GetResponseStream()))
              {
            stringBuilder.AppendFormat ("Body: {0}", reader.ReadToEnd());
            stringBuilder.AppendLine();
              }
            }
            catch (ProtocolViolationException)
            {
              // Occurs if there is no response stream and can be ignored
            }
              }
              catch (Exception x)
              {
            s_logger.Error ("Exception while getting exception details.", x);
              }
        }

        public void ContentKeyBaseCollectionGetProtectionKeyIdForContentKeyRetry()
        {
            var dataContextMock = new Mock<IMediaDataServiceContext>();

            var fakeException = new WebException("test", WebExceptionStatus.ConnectionClosed);

            var fakeResponse = new string[] { "testKey" };
            int exceptionCount = 2;

            dataContextMock.Setup((ctxt) => ctxt
                .Execute<string>(It.IsAny<Uri>()))
                .Returns(() =>
                {
                    if (--exceptionCount > 0) throw fakeException;
                    return fakeResponse;
                });

            _mediaContext.MediaServicesClassFactory = new TestMediaServicesClassFactory(dataContextMock.Object);

            var actual = ContentKeyBaseCollection.GetProtectionKeyIdForContentKey(_mediaContext, ContentKeyType.CommonEncryption);

            Assert.AreEqual(fakeResponse[0], actual);

            dataContextMock.Verify((ctxt) => ctxt.Execute<string>(It.IsAny<Uri>()), Times.Exactly(2));
        }