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fckutil.py

#!/usr/bin/env python

"""
FCKeditor - The text editor for Internet - http://www.fckeditor.net
Copyright (C) 2003-2008 Frederico Caldeira Knabben

== BEGIN LICENSE ==

Licensed under the terms of any of the following licenses at your
choice:

- GNU General Public License Version 2 or later (the "GPL")
http://www.gnu.org/licenses/gpl.html

- GNU Lesser General Public License Version 2.1 or later (the "LGPL")
http://www.gnu.org/licenses/lgpl.html

- Mozilla Public License Version 1.1 or later (the "MPL")
http://www.mozilla.org/MPL/MPL-1.1.html

== END LICENSE ==

Utility functions for the File Manager Connector for Python

"""

import string, re
import os
import config as Config

# Generic manipulation functions

def removeExtension(fileName):
      index = fileName.rindex(".")
      newFileName = fileName[0:index]
      return newFileName

def getExtension(fileName):
      index = fileName.rindex(".") + 1
      fileExtension = fileName[index:]
      return fileExtension

def removeFromStart(string, char):
      return string.lstrip(char)

def removeFromEnd(string, char):
      return string.rstrip(char)

# Path functions

def combinePaths( basePath, folder ):
      return removeFromEnd( basePath, '/' ) + '/' + removeFromStart( folder, '/' )

def getFileName(filename):
      " Purpose: helper function to extrapolate the filename "
      for splitChar in ["/", "\\"]:
            array = filename.split(splitChar)
            if (len(array) > 1):
                  filename = array[-1]
      return filename

def sanitizeFolderName( newFolderName ):
      "Do a cleanup of the folder name to avoid possible problems"
      # Remove . \ / | : ? * " < > and control characters
      return re.sub( '\\.|\\\\|\\/|\\||\\:|\\?|\\*|"|<|>|[\x00-\x1f\x7f-\x9f]', '_', newFolderName )

def sanitizeFileName( newFileName ):
      "Do a cleanup of the file name to avoid possible problems"
      # Replace dots in the name with underscores (only one dot can be there... security issue).
      if ( Config.ForceSingleExtension ): # remove dots
            newFileName = re.sub ( '\\.(?![^.]*$)', '_', newFileName ) ;
      newFileName = newFileName.replace('\\','/')           # convert windows to unix path
      newFileName = os.path.basename (newFileName)    # strip directories
      # Remove \ / | : ? *
      return re.sub ( '\\\\|\\/|\\||\\:|\\?|\\*|"|<|>|[\x00-\x1f\x7f-\x9f]/', '_', newFileName )

def getCurrentFolder(currentFolder):
      if not currentFolder:
            currentFolder = '/'

      # Check the current folder syntax (must begin and end with a slash).
      if (currentFolder[-1] <> "/"):
            currentFolder += "/"
      if (currentFolder[0] <> "/"):
            currentFolder = "/" + currentFolder

      # Ensure the folder path has no double-slashes
      while '//' in currentFolder:
            currentFolder = currentFolder.replace('//','/')

      # Check for invalid folder paths (..)
      if '..' in currentFolder or '\\' in currentFolder:
            return None

      # Check for invalid folder paths (..)
      if re.search( '(/\\.)|(//)|([\\\\:\\*\\?\\""\\<\\>\\|]|[\x00-\x1F]|[\x7f-\x9f])', currentFolder ):
            return None

      return currentFolder

def mapServerPath( environ, url):
      " Emulate the asp Server.mapPath function. Given an url path return the physical directory that it corresponds to "
      # This isn't correct but for the moment there's no other solution
      # If this script is under a virtual directory or symlink it will detect the problem and stop
      return combinePaths( getRootPath(environ), url )

def mapServerFolder(resourceTypePath, folderPath):
      return combinePaths ( resourceTypePath  , folderPath )

def getRootPath(environ):
      "Purpose: returns the root path on the server"
      # WARNING: this may not be thread safe, and doesn't work w/ VirtualServer/mod_python
      # Use Config.UserFilesAbsolutePath instead

      if environ.has_key('DOCUMENT_ROOT'):
            return environ['DOCUMENT_ROOT']
      else:
            realPath = os.path.realpath( './' )
            selfPath = environ['SCRIPT_FILENAME']
            selfPath = selfPath [ :  selfPath.rfind( '/'  ) ]
            selfPath = selfPath.replace( '/', os.path.sep)

            position = realPath.find(selfPath)

            # This can check only that this script isn't run from a virtual dir
            # But it avoids the problems that arise if it isn't checked
            raise realPath
            if ( position < 0 or position <> len(realPath) - len(selfPath) or realPath[ : position ]==''):
                  raise Exception('Sorry, can\'t map "UserFilesPath" to a physical path. You must set the "UserFilesAbsolutePath" value in "editor/filemanager/connectors/py/config.py".')
            return realPath[ : position ]

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