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Rename web framework packages from "ext" to "instrumentation" (#961)

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# Changelog
## Unreleased
- Change package name to opentelemetry-instrumentation-django
([#961](https://github.com/open-telemetry/opentelemetry-python/pull/961))
- Update environment variable names, prefix changed from `OPENTELEMETRY` to `OTEL` ([#904](https://github.com/open-telemetry/opentelemetry-python/pull/904))
## Version 0.11b0
Released 2020-07-28
- Use one general exclude list instead of two ([#872](https://github.com/open-telemetry/opentelemetry-python/pull/872))
## 0.8b0
Released 2020-05-27
- Add exclude list for paths and hosts to prevent from tracing
([#670](https://github.com/open-telemetry/opentelemetry-python/pull/670))
- Add support for django >= 1.10 (#717)
## 0.7b1
Released 2020-05-12
- Initial release

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graft src
graft tests
global-exclude *.pyc
global-exclude *.pyo
global-exclude __pycache__/*
include CHANGELOG.md
include MANIFEST.in
include README.rst
include LICENSE

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OpenTelemetry Django Tracing
============================
|pypi|
.. |pypi| image:: https://badge.fury.io/py/opentelemetry-instrumentation-django.svg
:target: https://pypi.org/project/opentelemetry-instrumentation-django/
This library allows tracing requests for Django applications.
Installation
------------
::
pip install opentelemetry-instrumentation-django
Configuration
-------------
Exclude lists
*************
To exclude certain URLs from being tracked, set the environment variable ``OTEL_PYTHON_DJANGO_EXCLUDED_URLS`` with comma delimited regexes representing which URLs to exclude.
For example,
::
export OTEL_PYTHON_DJANGO_EXCLUDED_URLS="client/.*/info,healthcheck"
will exclude requests such as ``https://site/client/123/info`` and ``https://site/xyz/healthcheck``.
References
----------
* `Django <https://www.djangoproject.com/>`_
* `OpenTelemetry Instrumentation for Django <https://opentelemetry-python.readthedocs.io/en/latest/instrumentation/django/django.html>`_
* `OpenTelemetry Project <https://opentelemetry.io/>`_

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# Copyright The OpenTelemetry Authors
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
[metadata]
name = opentelemetry-instrumentation-django
description = OpenTelemetry Instrumentation for Django
long_description = file: README.rst
long_description_content_type = text/x-rst
author = OpenTelemetry Authors
author_email = cncf-opentelemetry-contributors@lists.cncf.io
url = https://github.com/open-telemetry/opentelemetry-python/tree/master/instrumentation/opentelemetry-instrumentation-django
platforms = any
license = Apache-2.0
classifiers =
Development Status :: 4 - Beta
Intended Audience :: Developers
License :: OSI Approved :: Apache Software License
Programming Language :: Python
Programming Language :: Python :: 3
Programming Language :: Python :: 3.4
Programming Language :: Python :: 3.5
Programming Language :: Python :: 3.6
Programming Language :: Python :: 3.7
Programming Language :: Python :: 3.8
[options]
python_requires = >=3.4
package_dir=
=src
packages=find_namespace:
install_requires =
django >= 1.10
opentelemetry-instrumentation-wsgi == 0.12.dev0
opentelemetry-instrumentation == 0.12.dev0
opentelemetry-api == 0.12.dev0
[options.extras_require]
test =
opentelemetry-test == 0.12.dev0
[options.packages.find]
where = src
[options.entry_points]
opentelemetry_instrumentor =
django = opentelemetry.instrumentation.django:DjangoInstrumentor

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# Copyright The OpenTelemetry Authors
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from os.path import dirname, join
from setuptools import setup
PACKAGE_INFO = {}
with open(
join(
dirname(__file__),
"src",
"opentelemetry",
"instrumentation",
"django",
"version.py",
)
) as f:
exec(f.read(), PACKAGE_INFO)
setup(version=PACKAGE_INFO["__version__"])

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# Copyright The OpenTelemetry Authors
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from logging import getLogger
from django.conf import settings
from opentelemetry.configuration import Configuration
from opentelemetry.instrumentation.django.middleware import _DjangoMiddleware
from opentelemetry.instrumentation.instrumentor import BaseInstrumentor
_logger = getLogger(__name__)
class DjangoInstrumentor(BaseInstrumentor):
"""An instrumentor for Django
See `BaseInstrumentor`
"""
_opentelemetry_middleware = ".".join(
[_DjangoMiddleware.__module__, _DjangoMiddleware.__qualname__]
)
def _instrument(self, **kwargs):
# FIXME this is probably a pattern that will show up in the rest of the
# ext. Find a better way of implementing this.
# FIXME Probably the evaluation of strings into boolean values can be
# built inside the Configuration class itself with the magic method
# __bool__
if not Configuration().DJANGO_INSTRUMENT:
return
# This can not be solved, but is an inherent problem of this approach:
# the order of middleware entries matters, and here you have no control
# on that:
# https://docs.djangoproject.com/en/3.0/topics/http/middleware/#activating-middleware
# https://docs.djangoproject.com/en/3.0/ref/middleware/#middleware-ordering
settings_middleware = getattr(settings, "MIDDLEWARE", [])
settings_middleware.append(self._opentelemetry_middleware)
setattr(settings, "MIDDLEWARE", settings_middleware)
def _uninstrument(self, **kwargs):
settings_middleware = getattr(settings, "MIDDLEWARE", None)
# FIXME This is starting to smell like trouble. We have 2 mechanisms
# that may make this condition be True, one implemented in
# BaseInstrumentor and another one implemented in _instrument. Both
# stop _instrument from running and thus, settings_middleware not being
# set.
if settings_middleware is None or (
self._opentelemetry_middleware not in settings_middleware
):
return
settings_middleware.remove(self._opentelemetry_middleware)
setattr(settings, "MIDDLEWARE", settings_middleware)

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# Copyright The OpenTelemetry Authors
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from logging import getLogger
from opentelemetry.configuration import Configuration
from opentelemetry.context import attach, detach
from opentelemetry.instrumentation.django.version import __version__
from opentelemetry.instrumentation.wsgi import (
add_response_attributes,
collect_request_attributes,
get_header_from_environ,
)
from opentelemetry.propagators import extract
from opentelemetry.trace import SpanKind, get_tracer
from opentelemetry.util import ExcludeList
try:
from django.utils.deprecation import MiddlewareMixin
except ImportError:
MiddlewareMixin = object
_logger = getLogger(__name__)
class _DjangoMiddleware(MiddlewareMixin):
"""Django Middleware for OpenTelemetry
"""
_environ_activation_key = (
"opentelemetry-instrumentor-django.activation_key"
)
_environ_token = "opentelemetry-instrumentor-django.token"
_environ_span_key = "opentelemetry-instrumentor-django.span_key"
_excluded_urls = Configuration().DJANGO_EXCLUDED_URLS or []
if _excluded_urls:
_excluded_urls = ExcludeList(str.split(_excluded_urls, ","))
else:
_excluded_urls = ExcludeList(_excluded_urls)
def process_view(
self, request, view_func, view_args, view_kwargs
): # pylint: disable=unused-argument
# request.META is a dictionary containing all available HTTP headers
# Read more about request.META here:
# https://docs.djangoproject.com/en/3.0/ref/request-response/#django.http.HttpRequest.META
# environ = {
# key.lower().replace('_', '-').replace("http-", "", 1): value
# for key, value in request.META.items()
# }
if self._excluded_urls.url_disabled(request.build_absolute_uri("?")):
return
environ = request.META
token = attach(extract(get_header_from_environ, environ))
tracer = get_tracer(__name__, __version__)
attributes = collect_request_attributes(environ)
span = tracer.start_span(
view_func.__name__,
kind=SpanKind.SERVER,
attributes=attributes,
start_time=environ.get(
"opentelemetry-instrumentor-django.starttime_key"
),
)
activation = tracer.use_span(span, end_on_exit=True)
activation.__enter__()
request.META[self._environ_activation_key] = activation
request.META[self._environ_span_key] = span
request.META[self._environ_token] = token
def process_exception(self, request, exception):
# Django can call this method and process_response later. In order
# to avoid __exit__ and detach from being called twice then, the
# respective keys are being removed here.
if self._excluded_urls.url_disabled(request.build_absolute_uri("?")):
return
if self._environ_activation_key in request.META.keys():
request.META[self._environ_activation_key].__exit__(
type(exception),
exception,
getattr(exception, "__traceback__", None),
)
request.META.pop(self._environ_activation_key)
detach(request.environ[self._environ_token])
request.META.pop(self._environ_token, None)
def process_response(self, request, response):
if self._excluded_urls.url_disabled(request.build_absolute_uri("?")):
return response
if (
self._environ_activation_key in request.META.keys()
and self._environ_span_key in request.META.keys()
):
add_response_attributes(
request.META[self._environ_span_key],
"{} {}".format(response.status_code, response.reason_phrase),
response,
)
request.META.pop(self._environ_span_key)
request.META[self._environ_activation_key].__exit__(
None, None, None
)
request.META.pop(self._environ_activation_key)
if self._environ_token in request.META.keys():
detach(request.environ.get(self._environ_token))
request.META.pop(self._environ_token)
return response

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# Copyright The OpenTelemetry Authors
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
__version__ = "0.12.dev0"

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# Copyright The OpenTelemetry Authors
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from os import environ
def pytest_sessionstart(session): # pylint: disable=unused-argument
environ.setdefault("OTEL_PYTHON_DJANGO_INSTRUMENT", "True")

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# Copyright The OpenTelemetry Authors
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from sys import modules
from unittest.mock import patch
from django.conf import settings
from django.conf.urls import url
from django.test import Client
from django.test.utils import setup_test_environment, teardown_test_environment
from opentelemetry.configuration import Configuration
from opentelemetry.instrumentation.django import DjangoInstrumentor
from opentelemetry.test.wsgitestutil import WsgiTestBase
from opentelemetry.trace import SpanKind
from opentelemetry.trace.status import StatusCanonicalCode
from opentelemetry.util import ExcludeList
# pylint: disable=import-error
from .views import error, excluded, excluded_noarg, excluded_noarg2, traced
urlpatterns = [
url(r"^traced/", traced),
url(r"^error/", error),
url(r"^excluded_arg/", excluded),
url(r"^excluded_noarg/", excluded_noarg),
url(r"^excluded_noarg2/", excluded_noarg2),
]
_django_instrumentor = DjangoInstrumentor()
class TestMiddleware(WsgiTestBase):
@classmethod
def setUpClass(cls):
super().setUpClass()
settings.configure(ROOT_URLCONF=modules[__name__])
def setUp(self):
super().setUp()
setup_test_environment()
_django_instrumentor.instrument()
Configuration._reset() # pylint: disable=protected-access
def tearDown(self):
super().tearDown()
teardown_test_environment()
_django_instrumentor.uninstrument()
def test_traced_get(self):
Client().get("/traced/")
spans = self.memory_exporter.get_finished_spans()
self.assertEqual(len(spans), 1)
span = spans[0]
self.assertEqual(span.name, "traced")
self.assertEqual(span.kind, SpanKind.SERVER)
self.assertEqual(span.status.canonical_code, StatusCanonicalCode.OK)
self.assertEqual(span.attributes["http.method"], "GET")
self.assertEqual(
span.attributes["http.url"], "http://testserver/traced/"
)
self.assertEqual(span.attributes["http.scheme"], "http")
self.assertEqual(span.attributes["http.status_code"], 200)
self.assertEqual(span.attributes["http.status_text"], "OK")
def test_traced_post(self):
Client().post("/traced/")
spans = self.memory_exporter.get_finished_spans()
self.assertEqual(len(spans), 1)
span = spans[0]
self.assertEqual(span.name, "traced")
self.assertEqual(span.kind, SpanKind.SERVER)
self.assertEqual(span.status.canonical_code, StatusCanonicalCode.OK)
self.assertEqual(span.attributes["http.method"], "POST")
self.assertEqual(
span.attributes["http.url"], "http://testserver/traced/"
)
self.assertEqual(span.attributes["http.scheme"], "http")
self.assertEqual(span.attributes["http.status_code"], 200)
self.assertEqual(span.attributes["http.status_text"], "OK")
def test_error(self):
with self.assertRaises(ValueError):
Client().get("/error/")
spans = self.memory_exporter.get_finished_spans()
self.assertEqual(len(spans), 1)
span = spans[0]
self.assertEqual(span.name, "error")
self.assertEqual(span.kind, SpanKind.SERVER)
self.assertEqual(
span.status.canonical_code, StatusCanonicalCode.UNKNOWN
)
self.assertEqual(span.attributes["http.method"], "GET")
self.assertEqual(
span.attributes["http.url"], "http://testserver/error/"
)
self.assertEqual(span.attributes["http.scheme"], "http")
@patch(
"opentelemetry.instrumentation.django.middleware._DjangoMiddleware._excluded_urls",
ExcludeList(["http://testserver/excluded_arg/123", "excluded_noarg"]),
)
def test_exclude_lists(self):
client = Client()
client.get("/excluded_arg/123")
span_list = self.memory_exporter.get_finished_spans()
self.assertEqual(len(span_list), 0)
client.get("/excluded_arg/125")
span_list = self.memory_exporter.get_finished_spans()
self.assertEqual(len(span_list), 1)
client.get("/excluded_noarg/")
span_list = self.memory_exporter.get_finished_spans()
self.assertEqual(len(span_list), 1)
client.get("/excluded_noarg2/")
span_list = self.memory_exporter.get_finished_spans()
self.assertEqual(len(span_list), 1)

21
instrumentation/opentelemetry-instrumentation-django/tests/views.py Normal file
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@ -0,0 +1,21 @@
from django.http import HttpResponse
def traced(request): # pylint: disable=unused-argument
return HttpResponse()
def error(request): # pylint: disable=unused-argument
raise ValueError("error")
def excluded(request): # pylint: disable=unused-argument
return HttpResponse()
def excluded_noarg(request): # pylint: disable=unused-argument
return HttpResponse()
def excluded_noarg2(request): # pylint: disable=unused-argument
return HttpResponse()