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"""Tornado handlers for kernel specifications."""
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# Copyright (c) IPython Development Team.
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# Distributed under the terms of the Modified BSD License.
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import json
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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.kernel.kernelspec import _pythonfirst
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class MainKernelSpecHandler(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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ksm = self.kernel_spec_manager
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results = []
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for kernel_name in sorted(ksm.find_kernel_specs(), key=_pythonfirst):
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try:
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d = ksm.get_kernel_spec(kernel_name).to_dict()
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except Exception:
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self.log.error("Failed to load kernel spec: '%s'", kernel_name, exc_info=True)
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continue
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d['name'] = kernel_name
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results.append(d)
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self.set_header("Content-Type", 'application/json')
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self.finish(json.dumps(results))
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class KernelSpecHandler(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, kernel_name):
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ksm = self.kernel_spec_manager
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try:
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kernelspec = ksm.get_kernel_spec(kernel_name)
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except KeyError:
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raise web.HTTPError(404, u'Kernel spec %s not found' % kernel_name)
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self.set_header("Content-Type", 'application/json')
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self.finish(kernelspec.to_json())
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# URL to handler mappings
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kernel_name_regex = r"(?P<kernel_name>\w+)"
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default_handlers = [
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(r"/api/kernelspecs", MainKernelSpecHandler),
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(r"/api/kernelspecs/%s" % kernel_name_regex, KernelSpecHandler),
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]
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