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"""Tornado handlers for the notebooks web service.
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Authors:
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* Brian Granger
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"""
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#-----------------------------------------------------------------------------
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# Copyright (C) 2011 The IPython Development Team
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#
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# Distributed under the terms of the BSD License. The full license is in
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# the file COPYING, distributed as part of this software.
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#-----------------------------------------------------------------------------
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#-----------------------------------------------------------------------------
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# Imports
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#-----------------------------------------------------------------------------
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import json
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from tornado import web
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from IPython.html.utils import url_path_join, url_escape
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from IPython.utils.jsonutil import date_default
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from IPython.html.base.handlers import IPythonHandler, json_errors
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#-----------------------------------------------------------------------------
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# Notebook web service handlers
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#-----------------------------------------------------------------------------
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class NotebookHandler(IPythonHandler):
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SUPPORTED_METHODS = (u'GET', u'PUT', u'PATCH', u'POST', u'DELETE')
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def notebook_location(self, name, path=''):
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"""Return the full URL location of a notebook based.
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Parameters
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----------
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name : unicode
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The base name of the notebook, such as "foo.ipynb".
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path : unicode
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The URL path of the notebook.
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"""
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return url_escape(url_path_join(
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self.base_project_url, 'api', 'notebooks', path, name
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))
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def _finish_model(self, model, location=True):
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"""Finish a JSON request with a model, setting relevant headers, etc."""
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if location:
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location = self.notebook_location(model['name'], model['path'])
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self.set_header('Location', location)
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self.set_header('Last-Modified', model['last_modified'])
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self.finish(json.dumps(model, default=date_default))
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@web.authenticated
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@json_errors
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def get(self, path='', name=None):
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"""Return a Notebook or list of notebooks.
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* GET with path and no notebook name lists notebooks in a directory
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* GET with path and notebook name returns notebook JSON
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"""
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nbm = self.notebook_manager
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# Check to see if a notebook name was given
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if name is None:
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# List notebooks in 'path'
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notebooks = nbm.list_notebooks(path)
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self.finish(json.dumps(notebooks, default=date_default))
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return
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# get and return notebook representation
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model = nbm.get_notebook_model(name, path)
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self._finish_model(model, location=False)
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@web.authenticated
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@json_errors
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def patch(self, path='', name=None):
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"""PATCH renames a notebook without re-uploading content."""
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nbm = self.notebook_manager
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if name is None:
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raise web.HTTPError(400, u'Notebook name missing')
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model = self.get_json_body()
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if model is None:
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raise web.HTTPError(400, u'JSON body missing')
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model = nbm.update_notebook_model(model, name, path)
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self._finish_model(model)
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def _copy_notebook(self, copy_from, path, copy_to=None):
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"""Copy a notebook in path, optionally specifying the new name.
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Only support copying within the same directory.
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"""
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self.log.info(u"Copying notebook from %s/%s to %s/%s",
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path, copy_from,
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path, copy_to or '',
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)
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model = self.notebook_manager.copy_notebook(copy_from, copy_to, path)
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self.set_status(201)
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self._finish_model(model)
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def _upload_notebook(self, model, path, name=None):
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"""Upload a notebook
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If name specified, create it in path/name.
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"""
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self.log.info(u"Uploading notebook to %s/%s", path, name or '')
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if name:
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model['name'] = name
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model = self.notebook_manager.create_notebook_model(model, path)
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self.set_status(201)
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self._finish_model(model)
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def _create_empty_notebook(self, path, name=None):
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"""Create an empty notebook in path
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If name specified, create it in path/name.
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"""
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self.log.info(u"Creating new notebook in %s/%s", path, name or '')
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model = {}
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if name:
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model['name'] = name
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model = self.notebook_manager.create_notebook_model(model, path=path)
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self.set_status(201)
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self._finish_model(model)
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def _save_notebook(self, model, path, name):
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"""Save an existing notebook."""
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self.log.info(u"Saving notebook at %s/%s", path, name)
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model = self.notebook_manager.save_notebook_model(model, name, path)
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if model['path'] != path.strip('/') or model['name'] != name:
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# a rename happened, set Location header
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location = True
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else:
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location = False
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self._finish_model(model, location)
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@web.authenticated
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@json_errors
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def post(self, path='', name=None):
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"""Create a new notebook in the specified path.
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POST creates new notebooks. The server always decides on the notebook name.
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POST /api/notebooks/path
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New untitled notebook in path. If content specified, upload a
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notebook, otherwise start empty.
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POST /api/notebooks/path?copy=OtherNotebook.ipynb
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New copy of OtherNotebook in path
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"""
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if name is not None:
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raise web.HTTPError(400, "Only POST to directories. Use PUT for full names.")
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model = self.get_json_body()
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if model is not None:
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copy_from = model.get('copy_from')
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if copy_from:
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if model.get('content'):
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raise web.HTTPError(400, "Can't upload and copy at the same time.")
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self._copy_notebook(copy_from, path)
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else:
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self._upload_notebook(model, path)
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else:
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self._create_empty_notebook(path)
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@web.authenticated
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@json_errors
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def put(self, path='', name=None):
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"""Saves the notebook in the location specified by name and path.
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PUT is very similar to POST, but the requester specifies the name,
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whereas with POST, the server picks the name.
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PUT /api/notebooks/path/Name.ipynb
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Save notebook at ``path/Name.ipynb``. Notebook structure is specified
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in `content` key of JSON request body. If content is not specified,
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create a new empty notebook.
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PUT /api/notebooks/path/Name.ipynb?copy=OtherNotebook.ipynb
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Copy OtherNotebook to Name
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"""
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if name is None:
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raise web.HTTPError(400, "Only PUT to full names. Use POST for directories.")
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model = self.get_json_body()
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if model:
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copy_from = model.get('copy_from')
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if copy_from:
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if model.get('content'):
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raise web.HTTPError(400, "Can't upload and copy at the same time.")
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self._copy_notebook(copy_from, path, name)
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elif self.notebook_manager.notebook_exists(name, path):
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self._save_notebook(model, path, name)
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else:
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self._upload_notebook(model, path, name)
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else:
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self._create_empty_notebook(path, name)
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@web.authenticated
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@json_errors
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def delete(self, path='', name=None):
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"""delete the notebook in the given notebook path"""
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nbm = self.notebook_manager
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nbm.delete_notebook_model(name, path)
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self.set_status(204)
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self.finish()
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class NotebookCheckpointsHandler(IPythonHandler):
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SUPPORTED_METHODS = ('GET', 'POST')
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@web.authenticated
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@json_errors
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def get(self, path='', name=None):
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"""get lists checkpoints for a notebook"""
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nbm = self.notebook_manager
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checkpoints = nbm.list_checkpoints(name, path)
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data = json.dumps(checkpoints, default=date_default)
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self.finish(data)
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@web.authenticated
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@json_errors
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def post(self, path='', name=None):
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"""post creates a new checkpoint"""
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nbm = self.notebook_manager
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checkpoint = nbm.create_checkpoint(name, path)
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data = json.dumps(checkpoint, default=date_default)
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location = url_path_join(self.base_project_url, 'api/notebooks',
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path, name, 'checkpoints', checkpoint['id'])
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self.set_header('Location', url_escape(location))
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self.set_status(201)
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self.finish(data)
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class ModifyNotebookCheckpointsHandler(IPythonHandler):
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SUPPORTED_METHODS = ('POST', 'DELETE')
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@web.authenticated
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@json_errors
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def post(self, path, name, checkpoint_id):
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"""post restores a notebook from a checkpoint"""
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nbm = self.notebook_manager
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nbm.restore_checkpoint(checkpoint_id, name, path)
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self.set_status(204)
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self.finish()
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@web.authenticated
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@json_errors
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def delete(self, path, name, checkpoint_id):
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"""delete clears a checkpoint for a given notebook"""
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nbm = self.notebook_manager
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nbm.delete_checkpoint(checkpoint_id, name, path)
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self.set_status(204)
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self.finish()
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#-----------------------------------------------------------------------------
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# URL to handler mappings
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#-----------------------------------------------------------------------------
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_path_regex = r"(?P<path>(?:/.*)*)"
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_checkpoint_id_regex = r"(?P<checkpoint_id>[\w-]+)"
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_notebook_name_regex = r"(?P<name>[^/]+\.ipynb)"
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_notebook_path_regex = "%s/%s" % (_path_regex, _notebook_name_regex)
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default_handlers = [
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(r"/api/notebooks%s/checkpoints" % _notebook_path_regex, NotebookCheckpointsHandler),
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(r"/api/notebooks%s/checkpoints/%s" % (_notebook_path_regex, _checkpoint_id_regex),
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ModifyNotebookCheckpointsHandler),
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(r"/api/notebooks%s" % _notebook_path_regex, NotebookHandler),
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(r"/api/notebooks%s" % _path_regex, NotebookHandler),
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]
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