upstream/ipython Files · IPython/html/notebook/handlers.py

Backport PR : Fix for incorrect default encoding on Windows....

Backport PR : Fix for incorrect default encoding on Windows. Whilst trying out rendering notebooks in a flask app under Apache on Windows I got the below error when simply trying to import `SlidesExporter` ```python mod_wsgi (pid=6260): Exception occurred processing WSGI script 'flask_test.wsgi'. Traceback (most recent call last): File "flask_test.py", line 81, in render_notebook from IPython.nbconvert.exporters import SlidesExporter File "c:\\dev\\code\\ipython\\IPython\\__init__.py", line 47, in <module> from .terminal.embed import embed File "c:\\dev\\code\\ipython\\IPython\\terminal\\embed.py", line 32, in <module> from IPython.terminal.interactiveshell import TerminalInteractiveShell File "c:\\dev\\code\\ipython\\IPython\\terminal\\interactiveshell.py", line 25, in <module> from IPython.core.interactiveshell import InteractiveShell, InteractiveShellABC File "c:\\dev\\code\\ipython\\IPython\\core\\interactiveshell.py", line 59, in <module> from IPython.core.prompts import PromptManager File "c:\\dev\\code\\ipython\\IPython\\core\\prompts.py", line 138, in <module> HOME = py3compat.str_to_unicode(os.environ.get("HOME","//////:::::ZZZZZ,,,~~~")) File "c:\\dev\\code\\ipython\\IPython\\utils\\py3compat.py", line 18, in decode return s.decode(encoding, "replace") LookupError: unknown encoding: cp0 ``` A little bit of [googling](http://bugs.python.org/issue6501) suggests that Windows returns 'cp0' to indicate there is no code page. This fix simply looks for this invalid value and replaces it with something valid. With this change it works for me.

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             handlers.py
        
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             / IPython / html / notebook / handlers.py
          
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        Brian E. Granger
    
Splitting handlers into different files....

              r10642
            
      """Tornado handlers for the live notebook view.

        Brian E. Granger
    
Adding new files.

              r10641
            
      Authors:

      * Brian Granger

      """

      #-----------------------------------------------------------------------------

        Brian E. Granger
    
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      #  Copyright (C) 2011  The IPython Development Team

        Brian E. Granger
    
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      #

      #  Distributed under the terms of the BSD License.  The full license is in

      #  the file COPYING, distributed as part of this software.

      #-----------------------------------------------------------------------------

      #-----------------------------------------------------------------------------

      # Imports

      #-----------------------------------------------------------------------------

      import os

      from tornado import web

        Brian E. Granger
    
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      HTTPError = web.HTTPError

        Brian E. Granger
    
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        MinRK
    
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      from ..base.handlers import IPythonHandler

        Brian E. Granger
    
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      from ..utils import url_path_join

        Brian E. Granger
    
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      #-----------------------------------------------------------------------------

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      # Handlers

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      #-----------------------------------------------------------------------------

      class NewHandler(IPythonHandler):

          @web.authenticated

          def get(self):

              notebook_id = self.notebook_manager.new_notebook()

        Brian E. Granger
    
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              self.redirect(url_path_join(self.base_project_url, notebook_id))

        Brian E. Granger
    
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        Brian E. Granger
    
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      class NamedNotebookHandler(IPythonHandler):

        MinRK
    
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          @web.authenticated

        Brian E. Granger
    
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          def get(self, notebook_id):

              nbm = self.notebook_manager

              if not nbm.notebook_exists(notebook_id):

                  raise web.HTTPError(404, u'Notebook does not exist: %s' % notebook_id)       

        Brian E. Granger
    
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              r10723
            
              self.write(self.render_template('notebook.html',

        Brian E. Granger
    
Adding new files.

              r10641
            
                  project=self.project,

                  notebook_id=notebook_id,

                  kill_kernel=False,

                  mathjax_url=self.mathjax_url,

                  )

              )

      class NotebookRedirectHandler(IPythonHandler):

        MinRK
    
remove notebook read-only view...

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          @web.authenticated

        Brian E. Granger
    
Adding new files.

              r10641
            
          def get(self, notebook_name):

              # strip trailing .ipynb:

              notebook_name = os.path.splitext(notebook_name)[0]

              notebook_id = self.notebook_manager.rev_mapping.get(notebook_name, '')

              if notebook_id:

        Brian E. Granger
    
Fixing url join problems.

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                  url = url_path_join(self.settings.get('base_project_url', '/'), notebook_id)

        Brian E. Granger
    
Adding new files.

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                  return self.redirect(url)

              else:

                  raise HTTPError(404)

      class NotebookCopyHandler(IPythonHandler):

          @web.authenticated

          def get(self, notebook_id):

              notebook_id = self.notebook_manager.copy_notebook(notebook_id)

        Brian E. Granger
    
Fixing url join problems.

              r10644
            
              self.redirect(url_path_join(self.base_project_url, notebook_id))

        Brian E. Granger
    
Adding new files.

              r10641
            
        Brian E. Granger
    
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              r10647
            
      #-----------------------------------------------------------------------------

      # URL to handler mappings

      #-----------------------------------------------------------------------------

      _notebook_id_regex = r"(?P<notebook_id>\w+-\w+-\w+-\w+-\w+)"

      _notebook_name_regex = r"(?P<notebook_name>.+\.ipynb)"

      default_handlers = [

          (r"/new", NewHandler),

          (r"/%s" % _notebook_id_regex, NamedNotebookHandler),

          (r"/%s" % _notebook_name_regex, NotebookRedirectHandler),

          (r"/%s/copy" % _notebook_id_regex, NotebookCopyHandler),

      ]

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Brian E. Granger Splitting handlers into different files....	r10642	"""Tornado handlers for the live notebook view.
Brian E. Granger Adding new files.	r10641
		Authors:

		* Brian Granger
		"""

		#-----------------------------------------------------------------------------
Brian E. Granger Splitting handlers into different files....	r10642	# Copyright (C) 2011 The IPython Development Team
Brian E. Granger Adding new files.	r10641	#
		# Distributed under the terms of the BSD License. The full license is in
		# the file COPYING, distributed as part of this software.
		#-----------------------------------------------------------------------------

		#-----------------------------------------------------------------------------
		# Imports
		#-----------------------------------------------------------------------------

		import os
		from tornado import web
Brian E. Granger Splitting handlers into different files....	r10642	HTTPError = web.HTTPError
Brian E. Granger Adding new files.	r10641
MinRK remove notebook read-only view...	r11644	from ..base.handlers import IPythonHandler
Brian E. Granger Splitting handlers into different files....	r10642	from ..utils import url_path_join
Brian E. Granger Adding new files.	r10641
		#-----------------------------------------------------------------------------
Brian E. Granger Splitting handlers into different files....	r10642	# Handlers
Brian E. Granger Adding new files.	r10641	#-----------------------------------------------------------------------------


		class NewHandler(IPythonHandler):

		@web.authenticated
		def get(self):
		notebook_id = self.notebook_manager.new_notebook()
Brian E. Granger Fixing url join problems.	r10644	self.redirect(url_path_join(self.base_project_url, notebook_id))
Brian E. Granger Splitting handlers into different files....	r10642
Brian E. Granger Adding new files.	r10641
		class NamedNotebookHandler(IPythonHandler):

MinRK remove notebook read-only view...	r11644	@web.authenticated
Brian E. Granger Adding new files.	r10641	def get(self, notebook_id):
		nbm = self.notebook_manager
		if not nbm.notebook_exists(notebook_id):
		raise web.HTTPError(404, u'Notebook does not exist: %s' % notebook_id)
Brian E. Granger Creating override.css for each page....	r10723	self.write(self.render_template('notebook.html',
Brian E. Granger Adding new files.	r10641	project=self.project,
		notebook_id=notebook_id,
		kill_kernel=False,
		mathjax_url=self.mathjax_url,
		)
		)


		class NotebookRedirectHandler(IPythonHandler):

MinRK remove notebook read-only view...	r11644	@web.authenticated
Brian E. Granger Adding new files.	r10641	def get(self, notebook_name):
		# strip trailing .ipynb:
		notebook_name = os.path.splitext(notebook_name)[0]
		notebook_id = self.notebook_manager.rev_mapping.get(notebook_name, '')
		if notebook_id:
Brian E. Granger Fixing url join problems.	r10644	url = url_path_join(self.settings.get('base_project_url', '/'), notebook_id)
Brian E. Granger Adding new files.	r10641	return self.redirect(url)
		else:
		raise HTTPError(404)


		class NotebookCopyHandler(IPythonHandler):

		@web.authenticated
		def get(self, notebook_id):
		notebook_id = self.notebook_manager.copy_notebook(notebook_id)
Brian E. Granger Fixing url join problems.	r10644	self.redirect(url_path_join(self.base_project_url, notebook_id))
Brian E. Granger Adding new files.	r10641
Brian E. Granger More work on the handlers	r10647
		#-----------------------------------------------------------------------------
		# URL to handler mappings
		#-----------------------------------------------------------------------------


		_notebook_id_regex = r"(?P<notebook_id>\w+-\w+-\w+-\w+-\w+)"
		_notebook_name_regex = r"(?P<notebook_name>.+\.ipynb)"

		default_handlers = [
		(r"/new", NewHandler),
		(r"/%s" % _notebook_id_regex, NamedNotebookHandler),
		(r"/%s" % _notebook_name_regex, NotebookRedirectHandler),
		(r"/%s/copy" % _notebook_id_regex, NotebookCopyHandler),

		]