Specifies length of blocks readed from the client. ASPForm will read data source data using Request.BinaryRead(ChunkReadSize) method.
vChunkReadSize = ASPForm.ChunkReadSize
ASPForm.ChunkReadSize = vChunkReadSize
Long
1. Default value is 4kB bytes.
2. 0 (Zero) means that the source data are read in one block. There is no good idea to read whole data in one block - see note about IIS bellow.
3. If the source form size exceeds ScriptUtils.ASPForm.MaxMemoryStorage value, ASPForm will consume only 2*ChunkReadSize of physical memory.
4. ChunkReadSize should be
ChunkReadSize * n1 =
PutReadSize
ChunkReadSize * n2 = UploadReadAheadSize
where n1 and n2 are integers.
Note about IIS
and source binary data stream: IIS reads 48kB of data first (by default, see
UploadReadAheadSize property of IIS). All other data are read in 8kB blocks
(see PutReadSize property of IIS). The best value for UploadReadAheadSize is 0 (zero), please see ScriptUtils.ASPForm.Upload - Monitor and handle upload state/result article.
You can read/change this IIS
values for web server, web site, folder or exact upload script:
Dim WebServer, UploadReadAheadSize, PutReadSize
Set WebServer = GetObject("IIS://localhost/W3SVC[/sitenum[/folder[/uploadscript.asp]]]")
'Get UploadReadAheadSize property
UploadReadAheadSize = WebServer.UploadReadAheadSize
'Set another size
WebServer.UploadReadAheadSize = 0
'Get PutReadSize property
PutReadSize = WebServer.PutReadSize
'Set another size
WebServer.PutReadSize = 65536
Upload - Read short source data in one block |
<%
'Sample file Form-ChunkSize.asp
'
'
'Create upload form
Dim Form: Set Form = Server.CreateObject("ScriptUtils.ASPForm")
If Request.TotalBytes>0 And Request.TotalBytes<100000 Then
'Read short source data in one block
Form.ChunkReadSize = 0
'
End If
'was the Form successfully received?
If Form.State = 0 Then
Response.Write "<br>n of Items:" & Form.Items.Count
Response.Write "<br>n of Fields:" & Form.Fields.Count
Response.Write "<br>n of Files:" & Form.Files.Count
Response.Write "<br>" & vbCrLf
End If'Form.State = 0 then
%>
<br>sample For <A Href=http://www.motobit.com>HugeASP upload</A>
<form name="file_upload" method="POST" ENCTYPE="multipart/form-data" >
<input Name=SourceFile1 Type=File>
<input Name=SourceFile2 Type=File>
<input Name=Description1>
<input Name=SubmitButton Value="Submit >>" Type=Submit>
</Form> |
AddConnection, CancelConnection, CheckRequirements, Read, Sleep, StringToBinary
BytesRead, Files, FormType, getForm, CharSet, ChunkReadSize, Items, MaxMemoryStorage, NewUploadID, ReadTime, ReadTimeout, SizeLimit, SourceData, State, TempPath, Texts, ThreadPriority, TotalBytes, UploadID
The ASPForm collection retrieves the values of form elements posted to ASP script by a form using the POST method. ASPForm can process multipart/form-data or application/x-www-form-urlencoded data with length up to 2GB.
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