Lion.Web.UpLoadModule和AspnetUpload 两个.NET组件都是利用的这个方案。
当上传单文件时,两个软件的方法是一样的,继承HttpModule
HttpApplication application1 = sender as HttpApplication; HttpWorkerRequest request1 = (HttpWorkerRequest) ((IServiceProvider) HttpContext.Current).GetService(typeof(HttpWorkerRequest)); try { if (application1.Context.Request.ContentType.IndexOf("multipart/form-data") <= -1) { return; } //Check The HasEntityBody if (!request1.HasEntityBody()) { return; } int num1 = 0; TimeSpan span1 = DateTime.Now.Subtract(this.beginTime); string text1 = application1.Context.Request.ContentType.ToLower(); byte[] buffer1 = Encoding.ASCII.GetBytes(("\r\n--" + text1.Substring(text1.IndexOf("boundary=") + 9)).ToCharArray()); int num2 = Convert.ToInt32(request1.GetKnownRequestHeader(11)); Progress progress1 = new Progress(); application1.Context.Items.Add("FileList", new Hashtable()); byte[] buffer2 = request1.GetPreloadedEntityBody(); num1 += buffer2.Length; string text2 = this.AnalysePreloadedEntityBody(buffer2, "UploadGUID"); if (text2 != string.Empty) { application1.Context.Items.Add("LionSky_UpLoadModule_UploadGUID", text2); } bool flag1 = true; if ((num2 > this.UpLoadFileLength()) && ((0 > span1.TotalHours) || (span1.TotalHours > 3))) { flag1 = false; } if ((0 > span1.TotalHours) || (span1.TotalHours > 3)) { flag1 = false; } string text3 = this.AnalysePreloadedEntityBody(buffer2, "UploadFolder"); ArrayList list1 = new ArrayList(); RequestStream stream1 = new RequestStream(buffer2, buffer1, null, RequestStream.FileStatus.Close, RequestStream.ReadStatus.NoRead, text3, flag1, application1.Context, string.Empty); list1.AddRange(stream1.ReadBody); if (text2 != string.Empty) { progress1.FileLength = num2; progress1.ReceivedLength = num1; progress1.FileName = stream1.OriginalFileName; progress1.FileCount = ((Hashtable) application1.Context.Items["FileList"]).Count; application1.Application["_UploadGUID_" + text2] = progress1; } if (!request1.IsEntireEntityBodyIsPreloaded()) { byte[] buffer4; ArrayList list2; int num3 = 204800; byte[] buffer3 = new byte[num3]; while ((num2 - num1) >= num3) { if (!application1.Context.Response.IsClientConnected) { this.ClearApplication(application1); } num3 = request1.ReadEntityBody(buffer3, buffer3.Length); num1 += num3; list2 = stream1.ContentBody; if (list2.Count > 0) { buffer4 = new byte[list2.Count + buffer3.Length]; list2.CopyTo(buffer4, 0); buffer3.CopyTo(buffer4, list2.Count); stream1 = new RequestStream(buffer4, buffer1, stream1.FileStream, stream1.FStatus, stream1.RStatus, text3, flag1, application1.Context, stream1.OriginalFileName); } else { stream1 = new RequestStream(buffer3, buffer1, stream1.FileStream, stream1.FStatus, stream1.RStatus, text3, flag1, application1.Context, stream1.OriginalFileName); } list1.AddRange(stream1.ReadBody); if (text2 != string.Empty) { progress1.ReceivedLength = num1; progress1.FileName = stream1.OriginalFileName; progress1.FileCount = ((Hashtable) application1.Context.Items["FileList"]).Count; application1.Application["_UploadGUID_" + text2] = progress1; } } buffer3 = new byte[num2 - num1]; if (!application1.Context.Response.IsClientConnected && (stream1.FStatus == RequestStream.FileStatus.Open)) { this.ClearApplication(application1); } num3 = request1.ReadEntityBody(buffer3, buffer3.Length); list2 = stream1.ContentBody; if (list2.Count > 0) { buffer4 = new byte[list2.Count + buffer3.Length]; list2.CopyTo(buffer4, 0); buffer3.CopyTo(buffer4, list2.Count); stream1 = new RequestStream(buffer4, buffer1, stream1.FileStream, stream1.FStatus, stream1.RStatus, text3, flag1, application1.Context, stream1.OriginalFileName); } else { stream1 = new RequestStream(buffer3, buffer1, stream1.FileStream, stream1.FStatus, stream1.RStatus, text3, flag1, application1.Context, stream1.OriginalFileName); } list1.AddRange(stream1.ReadBody); if (text2 != string.Empty) { progress1.ReceivedLength = num1 + buffer3.Length; progress1.FileName = stream1.OriginalFileName; progress1.FileCount = ((Hashtable) application1.Context.Items["FileList"]).Count; if (flag1) { progress1.UploadStatus = Progress.UploadStatusEnum.Uploaded; } else { application1.Application.Remove("_UploadGUID_" + text2); } } } byte[] buffer5 = new byte[list1.Count]; list1.CopyTo(buffer5); this.PopulateRequestData(request1, buffer5); } catch (Exception exception1) { this.ClearApplication(application1); throw exception1; }
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