Research on large file uploading in asp.net application

Asp.net| upload in the project often use a large file upload, to upload the file has more than 100 m, so the study of the domestic use of large file upload components found in more than two controls Aspnetupload 2.0 and Lion.Web.UpLoadModule, two control methods are: using the implied httpworkerrequest, with its getpreloadedentitybody and The Readentitybody method reads data from the pipe that IIS creates for ASP.net. Chris Hynes provides us with a scheme (with HttpModule) that allows you to upload a large file, in real time, to show the upload progress.

Lion.Web.UpLoadModule and Aspnetupload two. NET components are used in this scenario.

When the flyer file, two software methods are the same, inherit 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;
}