/// <summary>
/// 构造函数。
/// </summary>
/// <param name="exception">异常信息。</param>
public ServiceErrorEventArgs(ServiceException exception)
{
this._exception = exception;
}
private static Stream GetRequestStream(string url, HttpRequestMethod method, string postData)
{
if (System.Windows.Deployment.Current.Dispatcher.CheckAccess())
{
throw new InvalidOperationException("不能在UI线程上执行此方法。");
}
HttpWebRequest httpWebRequest = WebRequest.Create(url) as HttpWebRequest;
httpWebRequest.Method = method.ToString();
switch (method)
{
case HttpRequestMethod.GET:
break;
case HttpRequestMethod.POST:
case HttpRequestMethod.PUT:
UTF8Encoding encoding = new UTF8Encoding();
httpWebRequest.ContentType = "application/x-www-form-urlencoded; charset=UTF-8";
byte[] data = encoding.GetBytes(postData);
AutoResetEvent requestWaitHandler = new AutoResetEvent(false);
AsyncCallback requestCallback = ar =>
{
Stream stream = httpWebRequest.EndGetRequestStream(ar);
stream.Write(data, 0, data.Length);
stream.Close();
requestWaitHandler.Set();
};
IAsyncResult asyncRequestResult = httpWebRequest.BeginGetRequestStream(requestCallback, null);
requestWaitHandler.WaitOne();
break;
default:
break;
}
AutoResetEvent responseWaitHandler = new AutoResetEvent(false);
Exception exception = null;
Stream resultStream = null;
AsyncCallback responseCallback = ar =>
{
try
{
HttpWebResponse httpWebResponse = (HttpWebResponse)httpWebRequest.EndGetResponse(ar);
resultStream = httpWebResponse.GetResponseStream();
}
catch (WebException webException)
{
HttpWebResponse errorResponse = webException.Response as HttpWebResponse;
if (errorResponse == null)
{
exception = new ServiceException(webException.Message, (int)(webException.Status), webException);
}
//当资源不存在时，tomcat返回404错误，错误流为html类型，故处理
if (errorResponse.ContentType.IndexOf("text/html") >= 0)
{
exception = new ServiceException(webException.Message, (int)errorResponse.StatusCode, webException);
}
Stream errorStream = errorResponse.GetResponseStream();
StreamReader reader = new StreamReader(errorStream);
string errorMessage = reader.ReadToEnd();
ErrorResource errorResource = JsonConvert.DeserializeObject<ErrorResource>(errorMessage);
errorResponse.Close();
errorStream.Close();
reader.Close();
exception = new SuperMap.Connector.Utility.ServiceException(errorResource.Error.ErrorMsg, errorResource.Error.Code, webException);
}
finally
{
responseWaitHandler.Set();
}
};
IAsyncResult asyncResponseResult = httpWebRequest.BeginGetResponse(responseCallback, null);
responseWaitHandler.WaitOne();
if (exception != null) throw exception;
return resultStream;
}