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From: Dan Pumphrey <dpumphre@ai.org>
Organization: Access Indiana
Subject: [asp advanced] advanced file manipulation...

First off I want to say thanks to everyone who provided suggestions to my problem yesterday - This list is great! Most lists that I belong to you can never get an answer to your question...

Enough noise - to the good stuff:

I have a text file with the following format:
username:password
username:password
username:password
...
Basically an apache passwd file - what I want to do is this:

1) Open file and find line with the username that was supplied via a form
2) once that line is found split it on the ":" and read the values into an array
3) Then I need to extract the first 2 chars from array(2) and save them as a separate string

I don't necessarily need someone to write the code and give it to me - I just can not find any information on Advanced File manipulation - I have WROX's Professional ASP book and it goes over basic opening and closing, reading the whole file as a string, etc. If anyone has some good links relating to Advanced file manipulation I would appreciate seeing them.

here is an example of how the code might look in perl:

open (FILE, "$filename");
if (/$username/) {
@array = split /:/;
if $pass = $array[2]; {&letthemin}
}
close (FILE)

Thanks again
Daniel Pumphrey

From: Manohar Kamath <mkamath@niu.edu>
Subject: Re: [asp advanced] advanced file manipulation...

Perl is still a great string manipulation language, owing to the Regular expressions. In your case, there is no one way of doing it. However, this is the pseudo-code.

Open the file
Array[i, j]
sLine = Read a line from the file
Do while Not end of File
Parse the string for :
Do While Not End of string
When found copy to Array[i, j]
j = j+ 1
Parse String for :
End Do
i = i + 1
sLine = Read a line from the file
End Do

While I can't talk about a component (mine) which does this, I can
surely give you the code that parse the line. You will have to build on
that for the file Loop.

Here it is:

' Initialize the variables used in the function
Dim arValues()

' If invalid strings, exit function
If sParseString = "" Or sDelimitor = "" Then
StringToArray = arValues
Exit Function
End If

lStart = 1
iCount = 0
lLen = Len(sParseString)
iDelimLen = Len(sDelimitor)


' Initialize the parsing
lPos = InStr(lStart, sParseString, sDelimitor)

' Loop through the string
Do While lPos > 0
' Resize the array and add the new segment
ReDim Preserve arValues(iCount)
arValues(iCount) = Mid(sParseString, lStart, lPos - lStart)
iCount = iCount + 1
lStart = lPos + iDelimLen
lPos = InStr(lStart, sParseString, sDelimitor)
Loop

' Check for any remnant string
If lStart <= lLen Then
ReDim Preserve arValues(iCount)
arValues(iCount) = Mid(sParseString, lStart)
End If

' Return the array
StringToArray = arValues


--
Manohar Kamath
http://www.kamath.com/books  Visit us !

From: James Page <James.Page@Cedalion.co.uk>
Subject: RE: [asp advanced] advanced file manipulation...
Date: Thu, 16 Apr 1998 09:46:43 +0100

I agree, Perl is probably going to be a lot easier for you if you are going to be parsing files. You can download the PerlScript engine from the ActiveWare site - http://www.activeware.com.

Also, did you know that JScript version 3.0 (that comes with IIS 4.0) also allows you to use regular expressions? Check out http://localhost/iishelp/jscript/htm/js596.htm, or the following Microsoft article: http://www.microsoft.com/sitebuilder/workshop/prog/ie4/jscript3.htm which details new JScript features.

%%%%%%%%%%%%%%%%%
%
%    James Page
%    Cedalion Ltd.
%    27 Maritime Street
%    Leith, Edinburgh, UK
%    http://www.cedalion.co.uk
%
%%%%%%%%%%%%%%%%%

From: Richard Walker <Richard.Walker@west-server.com>
Organization: West Engineering
Subject: Re: [asp advanced] advanced file manipulation...

James Page wrote:

> Also, did you know that JScript version 3.0 (that comes with IIS 4.0)
> also allows you to use regular expressions?

Just want to point out that JavaScript 1.2, which works with Netscape Communicator (4.x) also has a RegExp object that allows for perl-like parsing of regular expressions.

To find out more about this object, visit

http://developer.netscape.com/docs/manuals/communicator/jsref/corea3.htm#1158210

I personally find this documentation very concise, and it should conform to the JScript docs mentioned above.

--
Richard Walker
Systems Administrator, Webmaster
West Engineering

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