Asp – Update config file with classic ASP

asp-classicfile

I have a configuration file that i would like to update with classic asp.

Lets say the conf file looks like this:

[Parameters]
param1 = 'foo'
param2 = 'boo'
param3 = 'moo'
param4 = 'choo'

What I would like to do is write a script to change param2 and param4 to have different.

As I am not all that great with asp, I was wondering what would be the best way to do this? ie is there a way I can increment the line and look for param2 and param4 and then somehow replace the entire line?

Any help will be much appreciated.

Best Answer

I don't think there's a way you can random access write a file but you can use the file object to read in a file line by line, check if it's the line you want and if so update it, and write another one out.

Dim fs : Set fs = Server.CreateObject("Scripting.FileSystemObject")
Dim file : Set file = fs.OpenTextFile(Server.MapPath("file.config"))
Dim line
Do While Not fs.AtEndOfStream
     line = file.ReadLine()
     If IsThisTheLineIWant(line) Then
         ' some magic
     Else
         ' some hand waving
     End If
Loop

Related Solutions

Using ConfigurationManager to load config from an arbitrary location

Try this:

System.Configuration.ConfigurationFileMap fileMap = new ConfigurationFileMap(strConfigPath); //Path to your config file
System.Configuration.Configuration configuration = System.Configuration.ConfigurationManager.OpenMappedMachineConfiguration(fileMap);

Python – How to check whether a file exists without exceptions

If the reason you're checking is so you can do something like if file_exists: open_it(), it's safer to use a try around the attempt to open it. Checking and then opening risks the file being deleted or moved or something between when you check and when you try to open it.

If you're not planning to open the file immediately, you can use os.path.isfile

Return True if path is an existing regular file. This follows symbolic links, so both islink() and isfile() can be true for the same path.

import os.path
os.path.isfile(fname)

if you need to be sure it's a file.

Starting with Python 3.4, the pathlib module offers an object-oriented approach (backported to pathlib2 in Python 2.7):

from pathlib import Path

my_file = Path("/path/to/file")
if my_file.is_file():
    # file exists

To check a directory, do:

if my_file.is_dir():
    # directory exists

To check whether a Path object exists independently of whether is it a file or directory, use exists():

if my_file.exists():
    # path exists

You can also use resolve(strict=True) in a try block:

try:
    my_abs_path = my_file.resolve(strict=True)
except FileNotFoundError:
    # doesn't exist
else:
    # exists

Best Answer

Related Solutions

Using ConfigurationManager to load config from an arbitrary location

Python – How to check whether a file exists without exceptions

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