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Tip of the Day
Language: Active Server Pages (ASP)
Expertise: Beginner
Aug 12, 1999

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Application Security Testing: An Integral Part of DevOps


Verify Whether a File Exists From ASP

Question:
I am trying to access some PDF files in a database. I give the address of the file in the browser as an IP address. I am trying to create links for these files in a page. Before painting the link, I want to verify whether the link is valid and that the file exists. How can I do this in ASP?

Answer:

Use the FileExists method of the FileSystemObject from ASP to check if the file exists.

Dim fs, strFileNameAndPath

strFileNameAndPath = Your file name
' -- Use file name and path 
' -- from the database. Remember to map it 
' -- to the Web Server's point of view. 
' -- Use Server.MapPath for help.

Set fs = CreateObject("Scripting.FileSystemObject")
If fs.FileExists(strFileNameAndPath) Then
   ' -- file exists
else
   ' -- file does not exist
end if
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