/usr/lib/python2.7/dist-packages/notebook/nbconvert/handlers.py is in python-notebook 5.2.2-1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 | """Tornado handlers for nbconvert."""
# Copyright (c) Jupyter Development Team.
# Distributed under the terms of the Modified BSD License.
import io
import os
import zipfile
from tornado import web, escape
from tornado.log import app_log
from ..base.handlers import (
IPythonHandler, FilesRedirectHandler,
path_regex,
)
from nbformat import from_dict
from ipython_genutils.py3compat import cast_bytes
from ipython_genutils import text
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_attachment_header(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 nbconvert.exporters.base import get_exporter
except ImportError as e:
raise web.HTTPError(500, "Could not import nbconvert: %s" % e)
try:
Exporter = get_exporter(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:
app_log.exception("Could not construct Exporter: %s", Exporter)
raise web.HTTPError(500, "Could not construct Exporter: %s" % e)
class NbconvertFileHandler(IPythonHandler):
SUPPORTED_METHODS = ('GET',)
@web.authenticated
def get(self, format, path):
exporter = get_exporter(format, config=self.config, log=self.log)
path = path.strip('/')
# If the notebook relates to a real file (default contents manager),
# give its path to nbconvert.
if hasattr(self.contents_manager, '_get_os_path'):
os_path = self.contents_manager._get_os_path(path)
ext_resources_dir, basename = os.path.split(os_path)
else:
ext_resources_dir = None
model = self.contents_manager.get(path=path)
name = model['name']
if model['type'] != 'notebook':
# not a notebook, redirect to files
return FilesRedirectHandler.redirect_to_files(self, path)
nb = model['content']
self.set_header('Last-Modified', model['last_modified'])
# create resources dictionary
mod_date = model['last_modified'].strftime(text.date_format)
nb_title = os.path.splitext(name)[0]
resource_dict = {
"metadata": {
"name": nb_title,
"modified_date": mod_date
},
"config_dir": self.application.settings['config_dir']
}
if ext_resources_dir:
resource_dict['metadata']['path'] = ext_resources_dir
try:
output, resources = exporter.from_notebook_node(
nb,
resources=resource_dict
)
except Exception as e:
self.log.exception("nbconvert failed: %s", 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_attachment_header(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()
name = model.get('name', 'notebook.ipynb')
nbnode = from_dict(model['content'])
try:
output, resources = exporter.from_notebook_node(nbnode, resources={
"metadata": {"name": name[:name.rfind('.')],},
"config_dir": self.application.settings['config_dir'],
})
except Exception as e:
raise web.HTTPError(500, "nbconvert failed: %s" % e)
if respond_zip(self, 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<format>\w+)"
default_handlers = [
(r"/nbconvert/%s" % _format_regex, NbconvertPostHandler),
(r"/nbconvert/%s%s" % (_format_regex, path_regex),
NbconvertFileHandler),
]
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