import io import os import zipfile from tornado import web from ..base.handlers import IPythonHandler, notebook_path_regex from IPython.nbformat.current import to_notebook_json from IPython.utils import tz from IPython.utils.py3compat import cast_bytes import sys def find_resource_files(output_files_dir): files = [] for dirpath, dirnames, filenames in os.walk(output_files_dir): files.extend([os.path.join(dirpath, f) for f in filenames]) return files def respond_zip(handler, name, output, resources): """Zip up the output and resource files and respond with the zip file. Returns True if it has served a zip file, False if there are no resource files, in which case we serve the plain output file. """ # Check if we have resource files we need to zip output_files = resources.get('outputs', None) if not output_files: return False # Headers zip_filename = os.path.splitext(name)[0] + '.zip' handler.set_header('Content-Disposition', 'attachment; filename="%s"' % zip_filename) handler.set_header('Content-Type', 'application/zip') # Prepare the zip file buffer = io.BytesIO() zipf = zipfile.ZipFile(buffer, mode='w', compression=zipfile.ZIP_DEFLATED) output_filename = os.path.splitext(name)[0] + '.' + resources['output_extension'] zipf.writestr(output_filename, cast_bytes(output, 'utf-8')) for filename, data in output_files.items(): zipf.writestr(os.path.basename(filename), data) zipf.close() handler.finish(buffer.getvalue()) return True def get_exporter(format, **kwargs): """get an exporter, raising appropriate errors""" # if this fails, will raise 500 try: from IPython.nbconvert.exporters.export import exporter_map except ImportError as e: raise web.HTTPError(500, "Could not import nbconvert: %s" % e) try: Exporter = exporter_map[format] except KeyError: # should this be 400? raise web.HTTPError(404, u"No exporter for format: %s" % format) try: return Exporter(**kwargs) except Exception as e: raise web.HTTPError(500, "Could not construct Exporter: %s" % e) class NbconvertFileHandler(IPythonHandler): SUPPORTED_METHODS = ('GET',) @web.authenticated def get(self, format, path='', name=None): exporter = get_exporter(format, config=self.config) path = path.strip('/') model = self.notebook_manager.get_notebook(name=name, path=path) self.set_header('Last-Modified', model['last_modified']) try: output, resources = exporter.from_notebook_node(model['content']) except Exception as e: raise web.HTTPError(500, "nbconvert failed: %s" % e) if respond_zip(self, name, output, resources): return # Force download if requested if self.get_argument('download', 'false').lower() == 'true': filename = os.path.splitext(name)[0] + '.' + resources['output_extension'] self.set_header('Content-Disposition', 'attachment; filename="%s"' % filename) # MIME type if exporter.output_mimetype: self.set_header('Content-Type', '%s; charset=utf-8' % exporter.output_mimetype) self.finish(output) class NbconvertPostHandler(IPythonHandler): SUPPORTED_METHODS = ('POST',) @web.authenticated def post(self, format): exporter = get_exporter(format, config=self.config) model = self.get_json_body() nbnode = to_notebook_json(model['content']) try: output, resources = exporter.from_notebook_node(nbnode) except Exception as e: raise web.HTTPError(500, "nbconvert failed: %s" % e) if respond_zip(self, nbnode.metadata.name, output, resources): return # MIME type if exporter.output_mimetype: self.set_header('Content-Type', '%s; charset=utf-8' % exporter.output_mimetype) self.finish(output) #----------------------------------------------------------------------------- # URL to handler mappings #----------------------------------------------------------------------------- _format_regex = r"(?P\w+)" default_handlers = [ (r"/nbconvert/%s%s" % (_format_regex, notebook_path_regex), NbconvertFileHandler), (r"/nbconvert/%s" % _format_regex, NbconvertPostHandler), ]