/// <summary>
/// BeginRequest 处理程序
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void context_BeginRequest(object sender, EventArgs e)
{
HttpApplication application = sender as HttpApplication;
string caseParameter = HttpContext.Current.Request["Parameter"];
if (this.IsUploadRequest(application.Request) &&
caseParameter == "MyModule")
{
HttpWorkerRequest workerRequest = this.GetWorkerRequest(application.Context);
Encoding contentEncoding = application.Context.Request.ContentEncoding;
if (workerRequest != null)
{
byte[] boundary = this.ExtractBoundary(application.Request.ContentType, contentEncoding);
string uploadId = application.Request.QueryString["uploadId"];
MimeUploadHandler handler = new MimeUploadHandler(new RequestStream(workerRequest), boundary, uploadId, contentEncoding);
if (uploadId != null)
{
this.RegisterIn(application.Context, handler);
}
try
{
this.SetUploadState(application.Context, UploadState.ReceivingData);
handler.Parse();
this.InjectTextParts(workerRequest, contentEncoding.GetBytes(handler.TextParts));
}
catch (DisconnectedException)
{
this.CleanupFiles(application.Context);
}
}
}
}
/// <summary>
/// 设置上传状态
/// </summary>
/// <param name="context"></param>
/// <param name="state"></param>
private void SetUploadState(HttpContext context, UploadState state)
{
MimeUploadHandler uploadHandler = this.GetUploadHandler(context);
if (uploadHandler != null)
{
uploadHandler.UploadStatus.SetState(state);
}
}
/// <summary>
/// 获取上传文件集合
/// </summary>
/// <param name="context"></param>
/// <returns></returns>
public static UploadedFileCollection GetUploadedFiles(HttpContext context)
{
MimeUploadHandler handler = (MimeUploadHandler)context.Items["_uploadHandler"];
if (handler != null)
{
return(UploadedFileCollection.ReadOnly(handler.UploadedFiles));
}
return(null);
}
/// <summary>
/// 清除上传信息
/// </summary>
/// <param name="context"></param>
private void CleanupFiles(HttpContext context)
{
MimeUploadHandler uploadHandler = this.GetUploadHandler(context);
if (uploadHandler != null)
{
foreach (UploadedFile file in uploadHandler.UploadedFiles)
{
File.Delete(file.ServerPath);
}
uploadHandler.UploadedFiles.Clear();
}
}
private void RegisterIn(HttpContext context, MimeUploadHandler handler)
{
context.Items["_uploadHandler"] = handler;
context.Application["_UploadStatus_" + handler.UploadStatus.UploadId] = handler.UploadStatus;
}
