calibre-devs team mailing list archive

[Kovid Goyal <kovid@xxxxxxxxxxxxxx>]

Storing multiple PIDs should be easy, just use the customization framework and
have it split the customizations string on commas, so taht theuser can enter
multiple PIDs. More advanced customization would require you to build your own
customization widget, which is a little more involved.

Kovid.

On Tue, Nov 24, 2009 at 05:55:11PM +0000, David Woodhouse wrote:
> I bought a book yesterday from MobiPocket, intending to start reading it
> in Calibre or FBReader, and then later on my BeBook with OpenInkpot when
> that arrives. They took my money _before_ telling me that it would
> actually be limited to working on certain devices. In order to get _any_
> use out of the book I've purchased, I needed to remove the DRM.
> 
> I found a Calibre plugin which invoked MobiDeDRM as a separate process,
> and which didn't do any error checking -- so if you tried to import a
> non-DRMed file it would fail and end up importing a zero-length file.
> 
> I tweaked it a bit so that it uses the MobiDeDRM code directly in the
> plugin, so it's more portable and can catch errors more easily. The
> resulting patch against mobidedrm006.py is below (don't worry; none of
> the DRM code is in this patch even in the context, so you won't catch
> cooties from it even if you don't live in the Free World).
> 
> This version will at least allow you to import non-DRMed files without
> errors, as well as stripping the DRM for files which match the single
> configured PID. Anything which can't be decrypted will just be imported
> as-is.
> 
> It would be nice to improve it a bit further -- so it can store and try
> multiple PIDs, do the PID checksum check while you're entering the PID
> rather than later, and show a dialog box asking for a new PID if you try
> to import a file for which it doesn't have a valid PID. With 'abort
> import' and 'import uncracked' options for that dialog box.
> 
> Any volunteers for that? It's mostly beyond my python capabilities.
> 
> That subprocess.call("echo foo > /dev/tty") obviously needs to die, but
> I couldn't find a better way of giving any feedback.
> 
> --- f29c0eef0.txt	2009-11-24 12:48:23.000000000 +0000
> +++ mobidedrm_plugin.py	2009-11-24 12:49:42.000000000 +0000
> @@ -1,6 +1,6 @@
> -# This is a python script. You need a Python interpreter to run it.
> -# For example, ActiveState Python, which exists for windows.
> -#
> +import os, subprocess
> +from calibre.customize import FileTypePlugin
> +
>  # Changelog
>  #  0.01 - Initial version
>  #  0.02 - Huffdic compressed books were not properly decrypted
> @@ -169,17 +169,30 @@ class DrmStripper:
>  	def getResult(self):
>  		return self.data_file
>  
> -print "MobiDeDrm v0.06. Copyright (c) 2008 The Dark Reverser"
> -if len(sys.argv)<4:
> -	print "Removes protection from Mobipocket books"
> -	print "Usage:"
> -	print "  mobidedrm infile.mobi outfile.mobi PID"
> -else:  
> -	infile = sys.argv[1]
> -	outfile = sys.argv[2]
> -	pid = sys.argv[3]
> -	data_file = file(infile, 'rb').read()
> -	try:
> -		file(outfile, 'wb').write(DrmStripper(data_file, pid).getResult())
> -	except DrmException, e:
> -		print "Error: %s" % e
> \ No newline at end of file
> +
> +class MobiDeDRM(FileTypePlugin):
> +
> +	name                = 'MobiDeDRM' # Name of the plugin
> +	description         = 'Removes DRM from secure Mobi files'
> +	supported_platforms = ['linux', 'osx', 'windows'] # Platforms this plugin will run on
> +	author              = 'Who Says' # The author of this plugin
> +	version             = (0, 0, 6)   # The version number of this plugin
> +	file_types          = set(['prc']) # The file types that this plugin will be applied to
> +	on_import           = True # Run this plugin during the import
> +
> +	
> +	def run(self, path_to_ebook):
> +		of = self.temporary_file('.mobi')
> +		PID = self.site_customization
> +		data_file = file(path_to_ebook, 'rb').read()
> +		try:
> +			file(of.name, 'wb').write(DrmStripper(data_file, PID).getResult())
> +		except Exception, e:
> +			strexcept = 'echo exception: %s > /dev/tty' % e
> +			subprocess.call(strexcept,shell=True)
> +			raise e
> +
> +		return of.name
> +		
> +	def customization_help(self, gui=False):
> +		return 'Enter PID'
> 
> 
> -- 
> dwmw2
> 
> 
> 
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> 

-- 
_____________________________________

Dr. Kovid Goyal 
http://www.kovidgoyal.net
http://calibre.kovidgoyal.net
_____________________________________

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