Check for files/directories before the program start

Posted on 2008-06-13
Last Modified: 2011-09-20
I have a program that I want to publish in a Citrix Farm, but this program needs to have it`s configuration files under each user homedir/appata.

If some configuration is changed, I dont want to copy these files into each userdir manualy, but would like a visual basic or other commands to check the shared configuration folder first, and if a newer file there, it should be copied over to the userdir/appdata directory.

Any ideas?
Question by:oyvindell
LVL 18

Expert Comment

ID: 21780957
We used a scheme to check for program updates, where when the application first started up, it would make an HTTP request to a web server on the Company's intra-net.  We had information there about the latest release etc, and the program could download the updates if there were some (it checked file versions between what was on the client and what was on the webserver).

You could do something similar... if the config file on the server was newer than the one in the client's area, then download and overlay the clients.  Then read from the config file.

Author Comment

ID: 21781000
I forgott to mention that the config files is just ordinary .ini files in plain text, and not new msi or exe files that runs. So what`s needed is more like a file copy function
LVL 18

Expert Comment

ID: 21781274
Not really... if you do an HTTP Get or Post, even if the file type that you are linking to in the URL is a .INI or a .TXT or whatever, the HTTP request will get the file and download it to your program.  It will then be necessary for the program to parse what it retrieved, but that is pretty easy.

In our application, the information we got back was in .XML format, which makes the parsing easier, as you can load it into a DOM object, and then query the different attributes easier.
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Author Comment

ID: 21781883
I need a simple solution that I can go live with. Im not a programmer, but in my words, the example would be :

Program.bat <- file they start to start the program
Check if directory m:\documents and settings\userdir\appdata\program exist, if not create it
Check if files xxx in m:\documents and settings\userdir\appdata\program  exist, if not copy them for \\severname\share\program
Start Program m:\program files\program\program.exe
LVL 18

Expert Comment

ID: 21782531
Well, now you're giving conflicting specs as compared to your initial post, where you stated that you might change the configuration from time to time, so, needed to look at whether files on the server are newer than those on the client, which is a little more complicated to do with a batch file.

Adding the code to your program would be fairly easy, depending on what language your program is written in, but that assumes that you can modify the source of your "program.exe".  If not, then some sort of batch command file is your best bet.  I can help you with the source code, but not the batch command code, if that is the direction you eventually decide to take.
LVL 29

Accepted Solution

nffvrxqgrcfqvvc earned 500 total points
ID: 21783048
From your description it seems as if you just want to make sure that the the files from your config folder get copied to the users system. How about just copying the config folder to the app folder this would keep the files up to date. Visual Basic
Option Explicit
Private Const FO_COPY               As Long = &H2
Private Const FOF_SILENT            As Long = &H4
Private Const FOF_NOCONFIRMATION    As Long = &H10
   hWnd        As Long
   wFunc       As Long
   pFrom       As String
   pTo         As String
   fFlags      As Integer
   fAborted    As Boolean
   hNameMaps   As Long
   sProgress   As String
 End Type
Private Declare Function SHFileOperationA Lib "shell32" ( _
Private Declare Sub ZeroMemory Lib "kernel32.dll" Alias "RtlZeroMemory" ( _
    Destination As Any, _
    ByVal Length As Long)
Public Sub CopyDirectory( _
    ByVal FromDirectory As String, _
    ByVal ToDirectory As String)
    ZeroMemory SHT, Len(SHT)
    SHT.hWnd = 0
    SHT.wFunc = FO_COPY
    SHT.pTo = ToDirectory
    SHT.pFrom = FromDirectory
    SHFileOperationA SHT
End Sub
Private Sub Form_Load()
    CopyDirectory "e:\configfiles", "e:\appfiles"
End Sub

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Expert Comment

ID: 21793665
I have used a similar application.

I basically had two applications to run, first was my "startup.exe".  It checks ini information on the local installation and compares it to ini information in the "master" location.  If there is a difference, the user is prompted to update local installation.  (Of course, this step may be omitted and an update forced).  The startup.exe handles all the checking and copying.  This way, I don't have to contend with any file locks.

After the copy is complete, or if there are no changes to copy, the main executable is launched.

Hope this helps some.


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