108 lines
3.3 KiB
Python
108 lines
3.3 KiB
Python
|
"""Tornado handlers for kernel specifications.
|
||
|
|
|
||
|
|
Preliminary documentation at https://github.com/ipython/ipython/wiki/IPEP-25%3A-Registry-of-installed-kernels#rest-api
|
||
|
|
"""
|
||
|
|
|
||
|
|
# Copyright (c) Jupyter Development Team.
|
||
|
|
# Distributed under the terms of the Modified BSD License.
|
||
|
|
|
||
|
|
import glob
|
||
|
|
import json
|
||
|
|
import os
|
||
|
|
pjoin = os.path.join
|
||
|
|
|
||
|
|
from tornado import web, gen
|
||
|
|
|
||
|
|
from ...base.handlers import APIHandler
|
||
|
|
from ...utils import maybe_future, url_path_join, url_unescape
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
def kernelspec_model(handler, name, spec_dict, resource_dir):
|
||
|
|
"""Load a KernelSpec by name and return the REST API model"""
|
||
|
|
d = {
|
||
|
|
'name': name,
|
||
|
|
'spec': spec_dict,
|
||
|
|
'resources': {}
|
||
|
|
}
|
||
|
|
|
||
|
|
# Add resource files if they exist
|
||
|
|
resource_dir = resource_dir
|
||
|
|
for resource in ['kernel.js', 'kernel.css']:
|
||
|
|
if os.path.exists(pjoin(resource_dir, resource)):
|
||
|
|
d['resources'][resource] = url_path_join(
|
||
|
|
handler.base_url,
|
||
|
|
'kernelspecs',
|
||
|
|
name,
|
||
|
|
resource
|
||
|
|
)
|
||
|
|
for logo_file in glob.glob(pjoin(resource_dir, 'logo-*')):
|
||
|
|
fname = os.path.basename(logo_file)
|
||
|
|
no_ext, _ = os.path.splitext(fname)
|
||
|
|
d['resources'][no_ext] = url_path_join(
|
||
|
|
handler.base_url,
|
||
|
|
'kernelspecs',
|
||
|
|
name,
|
||
|
|
fname
|
||
|
|
)
|
||
|
|
return d
|
||
|
|
|
||
|
|
|
||
|
|
def is_kernelspec_model(spec_dict):
|
||
|
|
"""Returns True if spec_dict is already in proper form. This will occur when using a gateway."""
|
||
|
|
return isinstance(spec_dict, dict) and 'name' in spec_dict and 'spec' in spec_dict and 'resources' in spec_dict
|
||
|
|
|
||
|
|
|
||
|
|
class MainKernelSpecHandler(APIHandler):
|
||
|
|
|
||
|
|
@web.authenticated
|
||
|
|
@gen.coroutine
|
||
|
|
def get(self):
|
||
|
|
ksm = self.kernel_spec_manager
|
||
|
|
km = self.kernel_manager
|
||
|
|
model = {}
|
||
|
|
model['default'] = km.default_kernel_name
|
||
|
|
model['kernelspecs'] = specs = {}
|
||
|
|
kspecs = yield maybe_future(ksm.get_all_specs())
|
||
|
|
for kernel_name, kernel_info in kspecs.items():
|
||
|
|
try:
|
||
|
|
if is_kernelspec_model(kernel_info):
|
||
|
|
d = kernel_info
|
||
|
|
else:
|
||
|
|
d = kernelspec_model(self, kernel_name, kernel_info['spec'], kernel_info['resource_dir'])
|
||
|
|
except Exception:
|
||
|
|
self.log.error("Failed to load kernel spec: '%s'", kernel_name, exc_info=True)
|
||
|
|
continue
|
||
|
|
specs[kernel_name] = d
|
||
|
|
self.set_header("Content-Type", 'application/json')
|
||
|
|
self.finish(json.dumps(model))
|
||
|
|
|
||
|
|
|
||
|
|
class KernelSpecHandler(APIHandler):
|
||
|
|
|
||
|
|
@web.authenticated
|
||
|
|
@gen.coroutine
|
||
|
|
def get(self, kernel_name):
|
||
|
|
ksm = self.kernel_spec_manager
|
||
|
|
kernel_name = url_unescape(kernel_name)
|
||
|
|
try:
|
||
|
|
spec = yield maybe_future(ksm.get_kernel_spec(kernel_name))
|
||
|
|
except KeyError:
|
||
|
|
raise web.HTTPError(404, u'Kernel spec %s not found' % kernel_name)
|
||
|
|
if is_kernelspec_model(spec):
|
||
|
|
model = spec
|
||
|
|
else:
|
||
|
|
model = kernelspec_model(self, kernel_name, spec.to_dict(), spec.resource_dir)
|
||
|
|
self.set_header("Content-Type", 'application/json')
|
||
|
|
self.finish(json.dumps(model))
|
||
|
|
|
||
|
|
|
||
|
|
# URL to handler mappings
|
||
|
|
|
||
|
|
kernel_name_regex = r"(?P<kernel_name>[\w\.\-%]+)"
|
||
|
|
|
||
|
|
default_handlers = [
|
||
|
|
(r"/api/kernelspecs", MainKernelSpecHandler),
|
||
|
|
(r"/api/kernelspecs/%s" % kernel_name_regex, KernelSpecHandler),
|
||
|
|
]
|