Personalize the File Storage

This tutorial will show you how to personalize the storage folder, so each user who uses your application can upload the files in his own folder.

To see an example of how to implement simple authentication read here.

In order to achieve the personalization of the storage you have to do the following things:

Prepare the Account Session

In order to prepare the account session you have to create a method that gets the account name and determines whether the user is authorized.

The account name and the authorization information should be passed as parameters to the Upload Handler. To learn how to pass parameters to it read this topic.

Example 1: Preparing the account session

bool authorized = false; 
string accountName = string.Empty; 
private void PrepareAccountSession() 
{ 
    string dataAuthorized = this.GetQueryParameter( "Authorized" ); 
    this.authorized = !string.IsNullOrEmpty( dataAuthorized ) 
        && dataAuthorized.ToLower() == "true"; 
    this.accountName = this.GetQueryParameter("Account"); 
    if ( !this.authorized || string.IsNullOrEmpty( this.accountName ) ) 
        this.accountName = "Anonymous"; 
} 
Private authorized As Boolean = False 
Private accountName As String = String.Empty 
Private Sub PrepareAccountSession() 
 Dim dataAuthorized As String = Me.GetQueryParameter("Authorized") 
 Me.authorized = Not String.IsNullOrEmpty(dataAuthorized) AndAlso dataAuthorized.ToLower() = "true" 
 Me.accountName = Me.GetQueryParameter("Account") 
 If Not Me.authorized OrElse String.IsNullOrEmpty(Me.accountName) Then 
  Me.accountName = "Anonymous" 
 End If 
End Sub 

Override the GetTargetFolder method

The storage folder should be inside the Target Folder and must be named after the user. To do that you have to override the GetTargteFolder() method.

Example 2: Setting up the target folder

public override string GetTargetFolder() 
{ 
    string path = base.GetTargetFolder(); 
    if ( !string.IsNullOrEmpty( this.accountName ) ) 
    { 
        path += Path.DirectorySeparatorChar + this.accountName; 
    } 
    return path; 
} 
Public Overloads Overrides Function GetTargetFolder() As String 
 Dim path As String = MyBase.GetTargetFolder() 
 If Not String.IsNullOrEmpty(Me.accountName) Then 
  path += Path.DirectorySeparatorChar + Me.accountName 
 End If 
 Return path 
End Function 

Prepare the Storage Folder

In order to prepare the storage folder you have to create a method that checks whether the folder returned by the GetTargetFolder() method exists and creates the folder if needed.

Example 3: Ensuring that the storage folder exists

private bool PrepareStorageFolder() 
{ 
    string folderPath = this.GetTargetFolder(); 
    if ( !Directory.Exists( folderPath ) ) 
    { 
        Directory.CreateDirectory( folderPath ); 
    } 
    return Directory.Exists( folderPath ); 
} 
Private Function PrepareStorageFolder() As Boolean 
 Dim folderPath As String = Me.GetTargetFolder() 
 If Not Directory.Exists(folderPath) Then 
  Directory.CreateDirectory(folderPath) 
 End If 
 Return Directory.Exists(folderPath) 
End Function 

Override the SaveChunkData method

Overriding the SaveChunkData() method allows you to put all this together.

Example 4: Saving the data

public override bool SaveChunkData(string filePath, long position, byte[] buffer, int contentLength, out int savedBytes) 
{ 
 bool result; 
 this.PrepareAccountSession(); 
 if (!this.PrepareStorageFolder()) 
 { 
  result = false; 
 } 
 
 string FilePath = this.GetFilePath(); 
 result = base.SaveChunkData(FilePath, position, buffer, contentLength, out savedBytes); 
 return result; 
} 
Public Overrides Function SaveChunkData(filePath__1 As String, position As Long, buffer As Byte(), contentLength As Integer, ByRef savedBytes As Integer) As Boolean 
    Dim result As Boolean 
    Me.PrepareAccountSession() 
 
    If Not Me.PrepareStorageFolder() Then 
        result = False 
    End If 
 
    Dim FilePath__2 As String = Me.GetFilePath() 
    result = MyBase.SaveChunkData(FilePath__2, position, buffer, contentLength, savedBytes) 
 
    Return result 
End Function 

See Also

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