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import json
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import os
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from tornado import web
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from ..base.handlers import IPythonHandler, json_errors
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from IPython.nbformat.current import to_notebook_json
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from IPython.nbconvert.exporters.export import exporter_map
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from IPython.utils import tz
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def has_resource_files(resources):
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output_files_dir = resources.get('output_files_dir', "")
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return bool(os.path.isdir(output_files_dir) and \
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os.listdir(output_files_dir))
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class NbconvertFileHandler(IPythonHandler):
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SUPPORTED_METHODS = ('GET',)
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@web.authenticated
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def get(self, format, path='', name=None):
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exporter = exporter_map[format]()
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path = path.strip('/')
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os_path = self.notebook_manager.get_os_path(name, path)
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if not os.path.isfile(os_path):
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raise web.HTTPError(404, u'Notebook does not exist: %s' % name)
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info = os.stat(os_path)
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self.set_header('Last-Modified', tz.utcfromtimestamp(info.st_mtime))
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# Force download if requested
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if self.get_argument('download', 'false').lower() == 'true':
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filename = os.path.splitext(name)[0] + '.' + exporter.file_extension
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self.set_header('Content-Disposition',
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'attachment; filename="%s"' % filename)
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# MIME type
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if exporter.output_mimetype:
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self.set_header('Content-Type',
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'%s; charset=utf-8' % exporter.output_mimetype)
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output, resources = exporter.from_filename(os_path)
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# TODO: If there are resources, combine them into a zip file
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assert not has_resource_files(resources)
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self.finish(output)
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class NbconvertPostHandler(IPythonHandler):
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SUPPORTED_METHODS = ('POST',)
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@web.authenticated
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def post(self, format):
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exporter = exporter_map[format]()
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model = self.get_json_body()
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nbnode = to_notebook_json(model['content'])
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# MIME type
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if exporter.output_mimetype:
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self.set_header('Content-Type',
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'%s; charset=utf-8' % exporter.output_mimetype)
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output, resources = exporter.from_notebook_node(nbnode)
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# TODO: If there are resources, combine them into a zip file
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assert not has_resource_files(resources)
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self.finish(output)
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class NbconvertRootHandler(IPythonHandler):
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SUPPORTED_METHODS = ('GET',)
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@web.authenticated
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@json_errors
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def get(self):
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res = {}
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for format, exporter in exporter_map.items():
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res[format] = info = {}
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info['output_mimetype'] = exporter.output_mimetype
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self.finish(json.dumps(res))
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#-----------------------------------------------------------------------------
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# URL to handler mappings
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#-----------------------------------------------------------------------------
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_format_regex = r"(?P<format>\w+)"
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_path_regex = r"(?P<path>(?:/.*)*)"
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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"/nbconvert/%s%s" % (_format_regex, _notebook_path_regex),
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NbconvertFileHandler),
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(r"/nbconvert/%s" % _format_regex, NbconvertPostHandler),
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(r"/nbconvert", NbconvertRootHandler),
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]
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