[pywin32-bugs] [ pywin32-Bugs-1481242 ] win32print.WritePrinter() changes CR/LF to LF

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Bugs item #1481242, was opened at 2006-05-03 16:54
Message generated for change (Comment added) made by dnation
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Category: win32
Group: None
Status: Open
Resolution: None
Priority: 5
Submitted By: DaveNation (dnation)
Assigned to: Nobody/Anonymous (nobody)
Summary: win32print.WritePrinter() changes CR/LF to LF

Initial Comment:
I am trying to send files containing raw PCL5 data
directly to a Laserjet printer.

I am using the following win32print calls :
  h = OpenPrinter('Laserjet')
  StartDocPrinter(h,1,('bosdoc',None,'RAW'))
  WritePrinter(h,buff)
  EndDocPrinter(h)

When directing the data directly to the printer, only
the first line is printed. 

When requesting StartDocPrinter() to spool to a file,
the output file is identical to the input file except
all CR/LF pairs have been changed to single LF characters.

(In PCL5, sending CR resets the x co-ord.)

When making the same calls through VB6, the spooled
file still contains the CR/LF pair, which makes me
think it is the Python interface code that is removing
the CR character.

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>Comment By: DaveNation (dnation)
Date: 2006-05-04 16:02

Message:
Logged In: YES 
user_id=1515886

Roger

Many thanks for your response. It was just as you had
summized, the buffer was being loaded from a file not opened
in binary mode.

I used the file read() method, incorrectly assuming that
CR/LF -> LF translation was only done by readline() or
readlines().

Once again, thanks for the help it's much appreciated.

Dave



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Comment By: Roger Upole (rupole)
Date: 2006-05-04 09:34

Message:
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user_id=771074

WritePrinter doesn't do any manipulation on the data passed 
to it.  You don't specify where buff comes from, but if 
you're reading it from a file, make sure it's opened in 
binary mode.  Otherwise, it's treated as text and CR/LF
is automatically translated to LF.

        Roger


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You can respond by visiting: 
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