ASP ReadLine: Detect Format Of Line Breaks

Posted on 2010-08-25
Last Modified: 2013-09-25
My users are uploading a TXT file and I am using the following code:

Set objFSO = Server.CreateObject("Scripting.FileSystemObject")	
Set objFile = objFSO.OpenTextFile(strFilePath,1,False,-1)
Line = objFile.ReadLine

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The problem is that some are uploading a Mac text file and some are uploading a PC text file. A Hex compare of the files indicates that the EOL is 0A in one and 0D in the other.

First off, what is the proper name for each the formats?

Secondly, how can determine which is which via Classic ASP?

I tried changing x to 0,-1,-2 in the following:

Set objFile = objFSO.OpenTextFile(strFilePath,1,False,x)

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Ultimately, when I do a readline for the Mac formatted file, the Line contains the whole text file instead of just one line like when I use a PC formatted file.

Thanks in advance for your assistance!
Question by:djlurch
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LVL 82

Accepted Solution

hielo earned 500 total points
ID: 33527115
>>First off, what is the proper name for each the formats?
They are not different formats. What you are experiencing is just cross-platform incompatibilities.
Each of the major platforms use different characters as a newline delimiter.

Try the following:
Dim strContents,lines,win,mac,unx
'delimiters for the various platforms
win=chr(13) & chr(10)

Const ForReading = 1
Set objFSO = CreateObject("Scripting.FileSystemObject")
Set objFile = objFSO.OpenTextFile(strFilePath, ForReading)
strContents = objFile.ReadAll

If UBound(lines)=0 Then
	If UBound(r)=0 Then
	End If
End If

For i=0 TO UBound(lines)
	'lines(i) will hold the line content
	'do whatever with it...

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Author Comment

ID: 33527752

Unfortunately, I will not know which format they are using. I need to detect it server side. Possibly this will work:

If InStr(strContents,chr(13) & chr(10)) > 0 Then
   format = win
ElseIf InStr(strContents,chr(13)) > 0 Then
   format = mac
   format = unx
End If


Author Comment

ID: 33527791 your post and figured it out.
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LVL 82

Expert Comment

ID: 33535056
What I posted should work, regardless of which platform they are uploading from. Whatever it is that you were attempting to do with a line of text, would now be done at the place where I have:
'do whatever with it...

where "it" refers to lines(i) which is a line of text


Author Closing Comment

ID: 33535223
Elegant solution. Thanks!

Expert Comment

ID: 39521500
Line 15 is wrong

If UBound(r)=0 Then

should be

If UBound(lines)=0 Then

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