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<%@ Page Language="VB" AutoEventWireup="true" Debug="true" %>
<%@ Import Namespace="System.IO" %>
<script runat='server'>
dim openTag as String = ""
dim closeTag as String = ""
' Use this function to perform post upload actions
' fileName contain only name of uploaded file
' filePath conatin full path to uploaded file on your server
public Sub uploadCompleteHandler(ByVal fileName as String, ByVal filePath as String)
'some post upload actions here
'Response.Write("post upload "&filePath)
End Sub
Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)
dim FolderToSave as String = Server.MapPath("") & "\UploadedFiles\"
If String.IsNullOrEmpty(Request.QueryString("chunkedUpload")) Then
If Request.Files.Count > 0 Then
dim myFile as HttpPostedFile = Request.Files(0)
Dim fileName As String = GetFieldValue("FileName")
If Not String.IsNullOrEmpty(GetFieldValue("fileName")) Then
fileName = GetFieldValue("fileName")
End If
If String.IsNullOrEmpty(fileName) Then
fileName = myFile.FileName
End If
If not myfile is nothing andalso fileName <> "" Then
myFile.SaveAs(FolderToSave & System.IO.Path.GetFileName(fileName))
Response.Write("File " & fileName & " was successfully uploaded.")
uploadCompleteHandler(fileName, FolderToSave & System.IO.Path.GetFileName(fileName))
End If
End If
Response.Write("<br>") 'At least one symbol should be sent to response!!!
else
Dim tempPath As String = FolderToSave
'Used only by JavaPowUpload. determines that empty folder should be created
Dim isEmptyFolder as Boolean = NOT string.IsNullOrEmpty(GetFieldValue("isEmptyFolder"))
'type of upload which send request. Each uploader acts individually
Dim uploaderType as String = "html5"
if NOT string.IsNullOrEmpty(GetFieldValue("uploaderType")) Then
uploaderType = GetFieldValue("uploaderType").ToLower()
End If
'Size of uploaded file
Dim fileSize as Long = 0
if NOT string.IsNullOrEmpty(GetFieldValue("totalSize")) Then
Long.TryParse(GetFieldValue("totalSize"), fileSize)
End If
if NOT string.IsNullOrEmpty(GetFieldValue("FileSize")) Then
Long.TryParse(GetFieldValue("FileSize"), fileSize)
End If
'Get fileName
Dim fileName As String = GetFieldValue("FileName")
If Not String.IsNullOrEmpty(GetFieldValue("fileName")) Then
fileName = GetFieldValue("fileName")
End If
If Not String.IsNullOrEmpty(fileName) Then
fileName = HttpUtility.UrlDecode(fileName).Replace("..\\", "")
End If
'Determines if request sent with multiupart encoding
Dim isMultiPart As Boolean = false
If NOT String.IsNullOrEmpty(GetFieldValue("isMultiPart")) Then
Boolean.TryParse(GetFieldValue("isMultiPart"), isMultiPart)
End If
'Determines whether uploader ask for current file size or not
Dim querySize As Boolean = False
If NOT String.IsNullOrEmpty(GetFieldValue("QuerySize")) Then
Boolean.TryParse(GetFieldValue("QuerySize"), querySize)
End If
if NOT string.IsNullOrEmpty(GetFieldValue("action")) Then
querySize = GetFieldValue("action").ToLower().Equals("check")
End If
Dim complete As Boolean = false
If NOT String.IsNullOrEmpty(GetFieldValue("Complete")) Then
Boolean.TryParse(GetFieldValue("Complete"), complete)
End If
Dim uniqueID As String = String.Empty
If NOT String.IsNullOrEmpty(GetFieldValue("FileId")) Then
uniqueID = HttpUtility.UrlDecode(GetFieldValue("FileId"))
End If
If NOT String.IsNullOrEmpty(GetFieldValue("fid")) Then
uniqueID = HttpUtility.UrlDecode(GetFieldValue("fid"))
End If
If (String.IsNullOrEmpty(fileName) OrElse String.IsNullOrEmpty(tempPath)) Then
Return
End If
Dim dirPath As String = GetPath(tempPath)
Dim filePath As String = FolderToSave
FolderToSave = GetPath(FolderToSave)
Response.Clear()
'For Java and Flash based uploaders we should return special xml structure in response */
if uploaderType.Equals("java") Then
openTag = "<javapowupload>"
closeTag = "</javapowupload>"
elseif uploaderType.Equals("flash") Then
openTag = "<multipowupload>"
closeTag = "</multipowupload>"
End If
Response.Write(openTag)
filePath = Path.Combine(dirPath, (uniqueID & fileName))
Dim fi As FileInfo = New FileInfo(filePath)
If querySize Then
If Not Directory.Exists(dirPath) Then
WriteError("The path for file storage not found on the server."&dirPath , uploaderType)
ElseIf Not fi.Exists Then
WriteOk("0", uploaderType)
Else
WriteOk(fi.Length.ToString, uploaderType)
End If
Else
Dim fs As FileStream = Nothing
Dim ms as System.IO.MemoryStream = new System.IO.MemoryStream()
Try
If (isMultiPart AndAlso (Request.Files.Count < 1)) Then
WriteError("No chunk for save!", uploaderType)
Return
End If
if NOT ms Is Nothing Then
If Not isMultiPart Then
SaveFile(Request.InputStream, ms)
else
SaveFile(Request.Files(0).InputStream, ms)
End If
End If
If File.Exists(filePath) Then
fs = File.Open(filePath, FileMode.Append)
Else
fs = File.Create(filePath)
End If
If (Not (fs) Is Nothing) Then
ms.Seek(0, System.IO.SeekOrigin.Begin)
SaveFile(ms, fs)
fs.Close()
End If
If NOT uploaderType.Equals("silverlight") AND NOT uploaderType.Equals("html5") Then
complete = (fileSize > 0 AND NOT querySize) AND (new FileInfo(filePath)).Length >= fileSize
End If
If complete Then
'rename or move temp file
If File.Exists(Path.Combine(dirPath, fileName)) Then
File.Delete(filePath)
Else
File.Move(filePath, Path.Combine(FolderToSave, fileName))
End If
' Place here the code making postprocessing of the uploaded file (moving to other location, database, etc).
Response.Write("File " & fileName & " was successfully uploaded.<br/>")
uploadCompleteHandler(fileName, Path.Combine(FolderToSave, fileName))
End If
Response.Flush()
Catch ex As Exception
WriteError("Error: " & ex.Message, uploaderType)
finally
If (Not (fs) Is Nothing) Then
fs.Close()
End If
If (Not (ms) Is Nothing) Then
ms.Close()
End If
End Try
End If
End If
Response.Write(closeTag)
Response.Flush()
End Sub
Private Function GetPath(ByVal path As String) As String
If (path.StartsWith("/") OrElse path.StartsWith("~")) Then
Try
path = Server.MapPath(path)
Catch ex As System.Exception
End Try
End If
Return path
End Function
Private Sub SaveFile(ByVal stream As System.IO.Stream, ByVal fs As System.IO.Stream)
Dim buffer() As Byte = New Byte((40960) - 1) {}
Dim bytesRead As Integer
bytesRead = stream.Read(buffer, 0, buffer.Length)
While (bytesRead <> 0)
fs.Write(buffer, 0, bytesRead)
bytesRead = stream.Read(buffer, 0, buffer.Length)
End While
End Sub
'Get value of field from query string parameters or from form
Private Function GetFieldValue(ByVal fieldName as String) as String
If NOT string.IsNullOrEmpty(Request.QueryString(fieldName)) Then
return Request.QueryString(fieldName)
End If
If NOT string.IsNullOrEmpty(Request.Form(fieldName)) Then
return Request.Form(fieldName)
End If
return Nothing
End Function
'Write error to response stream
Public Sub WriteError(ByVal errstr as String, ByVal uploader as String)
If uploader.Equals("silverlight") OR uploader.Equals("html5") Then
Response.Write("Error: "&errstr)
Else
Response.Write("<error message='" & errstr & "'/>")
Response.Write(closeTag)
End If
Response.End()
End Sub
'Write OK to response stream
Public Sub WriteOk(ByVal size as String, ByVal uploader as String)
If uploader.Equals("silverlight") OR uploader.Equals("html5") Then
Response.Write(size)
Else
If NOT string.IsNullOrEmpty(size) Then
Response.Write("<ok size='" & size & "'/>")
Else
Response.Write("<ok/>")
End If
End If
End Sub
'Write response to response stream
Public Sub WriteResponse(ByVal resp as String, ByVal uploader as String)
If uploader.Equals("silverlight") OR uploader.Equals("html5") Then
Response.Write(resp)
Else
Response.Write("<response> " & resp & "</response>")
End If
End Sub
</script>