我正在使用 (C#) 和 (ASP.NET Web API) 和 MS SQL 2008 R2 开发 Web 应用程序，并在 Windows Server 2008 的 IIS7 上托管，所有 API 都以 JSON 格式返回数据
当我从任何网络浏览器调用任何 API 并在第一次调用完成之前刷新页面以再次调用时，它会在事件查看器中给我警告，并且在 0 到 5 分钟后 II7 中的工作进程停止了大约 2 分钟（挂起）和在这 2 分钟内来自所有用户的所有 API 调用都不起作用，事件查看器给我一个错误：
事件查看器中的警告
Event code: 3005
Event message: An unhandled exception has occurred.
Event time: 6/5/2012 3:29:10 PM
Event time (UTC): 6/5/2012 1:29:10 PM
Event ID: 63adcb812864465cab58e9f870bcbb92
Event sequence: 5
Event occurrence: 1
Event detail code: 0
Application information:
Application domain: /LM/W3SVC/2/ROOT/AAA-2-129833765408950000
Trust level: Full
Application Virtual Path: /AAA
Application Path: C:\inetpub\wwwroot\AAA\
Machine name: MyMachine
Process information:
Process ID: 9860
Process name: w3wp.exe
Account name: NT AUTHORITY\NETWORK SERVICE
Exception information:
Exception type: HttpException
Exception message: The remote host closed the connection. The error code is 0x800704CD.
at System.Web.Http.WebHost.HttpControllerHandler.EndProcessRequest(IAsyncResult result)
at System.Web.Http.WebHost.HttpControllerHandler.System.Web.IHttpAsyncHandler.EndProcessRequest(IAsyncResult result)
at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)
Request information:
Request URL: My API URL
Request path: API Path
User host address: My IP
User:
Is authenticated: False
Authentication Type:
Thread account name: NT AUTHORITY\NETWORK SERVICE
Thread information:
Thread ID: 8
Thread account name: NT AUTHORITY\NETWORK SERVICE
Is impersonating: False
Stack trace: at System.Web.Http.WebHost.HttpControllerHandler.EndProcessRequest(IAsyncResult result)
at System.Web.Http.WebHost.HttpControllerHandler.System.Web.IHttpAsyncHandler.EndProcessRequest(IAsyncResult result)
at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)
事件查看器中的错误
An unhandled exception occurred and the process was terminated.
Application ID: /LM/W3SVC/2/ROOT/AAA
Process ID: 9860
Exception: System.AggregateException
Message: A Task's exception(s) were not observed either by Waiting on the Task or accessing its Exception property. As a result, the unobserved exception was rethrown by the finalizer thread.
StackTrace: at System.Threading.Tasks.TaskExceptionHolder.Finalize()
InnerException: System.Web.HttpException
Message: The remote host closed the connection. The error code is 0x800704CD.
StackTrace: at System.Web.Http.WebHost.HttpControllerHandler.EndProcessRequest(IAsyncResult result)
at System.Web.Http.WebHost.HttpControllerHandler.System.Web.IHttpAsyncHandler.EndProcessRequest(IAsyncResult result)
at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)
背后的代码
公共类内容控制器：ApiController { 动态 json = new JsonObject();
// GET /api/v1/content
[HttpGet]
public IEnumerable<ME_API_V1.Models.Content> GetContent()
{
Request.Headers.Add("Accept", "application/json");
List<ZMSLibrary.ME.Models.Content> contentList = new List<ZMSLibrary.ME.Models.Content>() ;
try
{
//DateTime CurrentDateTime = DateTime.Now;
var querystring = this.Request.RequestUri.Query;
var parameters = HttpUtility.ParseQueryString(querystring);
string userID = parameters["userID"];
string countryCode = parameters["countryCode"];
string language = parameters["language"];
string categoryName = parameters["categoryName"];
string subcategoryID = parameters["subcategoryID"];
string count = parameters["count"];
string start = parameters["start"];
string platform = parameters["platform"];
string imageSize = parameters["imageSize"];
//Check IP Restiriction
Restriction restiriction = new Restriction(ConfigurationManager.ConnectionStrings["AppSQLConnection"].ToString());
bool allowedCheck = restiriction.IsUserAllowed(userID);
if (!allowedCheck)
{
dynamic json = new JsonObject();
json.message = "Authorized Only for Mobinil in Egypt";
var msg = new HttpResponseMessage(System.Net.HttpStatusCode.Forbidden);
msg.Content = new StringContent(json.ToString());
msg.Content.Headers.ContentType.MediaType = "application/json";
throw new HttpResponseException(msg);
}
else
{
//Validate input data
if (InputValidation.isValidUserid(userID) &&
InputValidation.isValidCountryCode(countryCode) &&
InputValidation.isValidLanguage(language) &&
InputValidation.isValidCategory(categoryName) &&
InputValidation.isValidUserid(subcategoryID) &&
InputValidation.isValidPlatform(platform)
)
{
if (!InputValidation.isValidImageSize(imageSize))
{
imageSize = "high";
}
if (!InputValidation.isValidUserid(count) || !InputValidation.isValidUserid(start))
{
start = WebConfigurationManager.AppSettings["DefaultStart"];
count = WebConfigurationManager.AppSettings["DefaultCount"];
}
ContentOperations contentOperations = new ContentOperations();
contentList = contentOperations.getContent(subcategoryID, categoryName, count, start, countryCode, userID, ConfigurationManager.ConnectionStrings["AppSQLConnection"].ToString(), WebConfigurationManager.AppSettings["FileFolderName"], imageSize, language, platform);
if (contentList != null)
{
List<ME_API_V1.Models.Content> contentOutputList = new List<ME_API_V1.Models.Content>();
foreach (ZMSLibrary.ME.Models.Content c in contentList)
{
File tempFile = new File();
ME_API_V1.Models.Content cTemp = new ME_API_V1.Models.Content();
cTemp.contentID = int.Parse(c.ContentID);
if (c.Rating == "1")
cTemp.userRating = "Like";
else if (c.Rating == "0")
cTemp.userRating = "Dislike";
cTemp.date = String.Format("{0:G}", c.ContentDate);
//if (c.Provider.ContentProviderName != "") //to make the value null instead of ""
cTemp.providerName = c.Provider.ContentProviderName;
//if (c.Provider.ContentProviderIcon != "")
cTemp.providerIconURL = c.Provider.ContentProviderIcon;
//if (c.Provider.ContentProviderImage != "")
cTemp.providerImageURL = c.Provider.ContentProviderImage;
if (language == "AR")
{
//if (c.ContentArabicTitle != "")
cTemp.title = c.ContentArabicTitle;
//if (c.ContentArabicSubTitle != "")
cTemp.subtitle = c.ContentArabicSubTitle;
//if (c.ContentArabicDescription != "")
cTemp.description = c.ContentArabicDescription;
}
else
{
//if (c.ContentEnglishTitle != "")
cTemp.title = c.ContentEnglishTitle;
//if (c.ContentEnglishSubTitle != "")
cTemp.subtitle = c.ContentEnglishSubTitle;
//if (c.ContentEnglishDescription != "")
cTemp.description = c.ContentEnglishDescription;
}
if (categoryName == "Music")
{
foreach (ContentFile cf in c.ContentFiles)
{
if (cf.FileType.FileTypeName == "Icon")
tempFile.iconURL = cf.ContentFileName;
else if (cf.FileType.FileTypeName == "Image")
tempFile.imageURL = cf.ContentFileName;
else if (cf.FileType.FileTypeName == "Clip_High")
tempFile.highVideoURL = cf.ContentFileName;
else if (cf.FileType.FileTypeName == "Clip_Low")
tempFile.lowVideoURL = cf.ContentFileName;
else if (cf.FileType.FileTypeName == "Tone")
tempFile.toneURL = cf.ContentFileName;
else if (cf.FileType.FileTypeName == "Song")
tempFile.songURL = cf.ContentFileName;
else if (cf.FileType.FileTypeName == "YouTube")
tempFile.youtubeID = cf.ContentFileName;
}
}
else if (categoryName == "News")
{
foreach (ContentFile cf in c.ContentFiles)
{
if (cf.FileType.FileTypeName == "Icon")
tempFile.iconURL = cf.ContentFileName;
else if (cf.FileType.FileTypeName == "Image")
tempFile.imageURL = cf.ContentFileName;
}
}
else if (categoryName == "Videos")
{
foreach (ContentFile cf in c.ContentFiles)
{
if (cf.FileType.FileTypeName == "Icon")
tempFile.iconURL = cf.ContentFileName;
else if (cf.FileType.FileTypeName == "Image")
tempFile.imageURL = cf.ContentFileName;
else if (cf.FileType.FileTypeName == "Video_High")
tempFile.highVideoURL = cf.ContentFileName;
else if (cf.FileType.FileTypeName == "Video_Low")
tempFile.lowVideoURL = cf.ContentFileName;
else if (cf.FileType.FileTypeName == "YouTube")
tempFile.youtubeID = cf.ContentFileName;
}
}
else if (categoryName == "Applications")
{
foreach (ContentFile cf in c.ContentFiles)
{
if (cf.FileType.FileTypeName == "Icon")
tempFile.iconURL = cf.ContentFileName;
else if (cf.FileType.FileTypeName == "Image")
tempFile.imageURL = cf.ContentFileName;
else if (cf.FileType.FileTypeName == "App_Android" || cf.FileType.FileTypeName == "App_Nokia" || cf.FileType.FileTypeName == "App_Blackberry" || cf.FileType.FileTypeName == "App_iPhone")
{
tempFile.appURL = cf.ContentFileName;
}
}
}
cTemp.files = tempFile;
contentOutputList.Add(cTemp);
}
return contentOutputList;
}
}
if (contentList == null)
throw new Exception();
else
{
json.message = "Wrong or missing data";
var msg = new HttpResponseMessage(System.Net.HttpStatusCode.BadRequest);
msg.Content = new StringContent(json.ToString());
msg.Content.Headers.ContentType.MediaType = "application/json";
throw new HttpResponseException(msg);
}
}
}
catch (Exception ex)
{
if (ex is HttpResponseException)
{
throw;
}
else
{
json.message = "Error in System";
var msg = new HttpResponseMessage(System.Net.HttpStatusCode.InternalServerError);
msg.Content = new StringContent(json.ToString());
msg.Content.Headers.ContentType.MediaType = "application/json";
throw new HttpResponseException(msg);
}
}
}
}