OPMS/03-程式設計階段/TmpWeb/OT.Web/Ap_Code/UpLoadHttpModule.cs

using System;
using System.Web;
using System.Reflection;
using System.Web.Configuration;

namespace OT.Web.Ap_Code
{
    public class UpLoadHttpModule : IHttpModule
    {
        private void Application_BeginRequest(object sender, EventArgs e)
        {
            HttpRequest request = HttpContext.Current.Request;//0x400000
            HttpRuntimeSection configSection = (HttpRuntimeSection)HttpContext.Current.GetSection("system.web/httpRuntime");
            //if (request.ContentLength > configSection.MaxRequestLength * 1024 || request.ContentLength > BasePage.gintUploadSize * 1024 * 1024)
            if (request.ContentLength > configSection.MaxRequestLength * 1024)
            {
                HttpApplication app = sender as HttpApplication;
                HttpContext context = app.Context;
                try
                {
                    HttpWorkerRequest wr = (HttpWorkerRequest)context.GetType().GetProperty("WorkerRequest", BindingFlags.NonPublic | BindingFlags.Instance).GetValue(context, null);
                    if (wr.HasEntityBody())
                    {
                        int contentlen = Convert.ToInt32(wr.GetKnownRequestHeader(11));
                        byte[] buffer = wr.GetPreloadedEntityBody();
                        int received = 0;
                        if (buffer != null)
                        {
                            received = buffer.Length;
                        }
                        int totalrecv = received;
                        if (!wr.IsEntireEntityBodyIsPreloaded())
                        {
                            buffer = new byte[0xffff];
                            while ((contentlen - totalrecv) >= received)
                            {
                                received = wr.ReadEntityBody(buffer, buffer.Length);
                                totalrecv += received;
                            }
                            received = wr.ReadEntityBody(buffer, contentlen - totalrecv);
                        }
                    }
                    context.Response.Redirect(request.Url.ToString() + "&ErrMsg=FileMaxError");
                }
                catch (Exception)
                {
                    context.Response.Redirect(request.Url.ToString() + "&ErrMsg=FileMaxError");
                    context.Response.Redirect("~/Error.aspx" + request.Url.Query + "");
                }
            }
        }

        private void application_EndRequest(object sender, EventArgs e)
        {
        }
        public void Dispose()
        {
        }
        public void Init(HttpApplication application)
        {
            application.BeginRequest += new EventHandler(this.Application_BeginRequest);
            application.EndRequest += new EventHandler(this.application_EndRequest);
        }
    }
}