Add support for generic OTEL_PYTHON_EXCLUDED_URLS variable

Use `OTEL_PYTHON_EXCLUDED_URLS` environment variable as a fallback of
`OTEL_PYTHON_{instrumentation}_EXCLUDED_URLS`.

instrumentation/opentelemetry-instrumentation-django/src/opentelemetry/instrumentation/django/__init__.py

@@ -32,7 +32,8 @@
 
 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.
+To exclude certain URLs from being tracked, set the environment variable ``OTEL_PYTHON_EXCLUDED_URLS`` or ``OTEL_PYTHON_DJANGO_EXCLUDED_URLS``
+with comma delimited regexes representing which URLs to exclude.
 
 For example,
 

instrumentation/opentelemetry-instrumentation-falcon/README.rst

@@ -21,7 +21,8 @@ Configuration
 
 Exclude lists
 *************
-To exclude certain URLs from being tracked, set the environment variable ``OTEL_PYTHON_FALCON_EXCLUDED_URLS`` with comma delimited regexes representing which URLs to exclude.
+To exclude certain URLs from being tracked, set the environment variable ``OTEL_PYTHON_EXCLUDED_URLS`` or ``OTEL_PYTHON_FALCON_EXCLUDED_URLS``
+with comma delimited regexes representing which URLs to exclude.
 
 For example,
 
@@ -34,7 +35,7 @@ will exclude requests such as ``https://site/client/123/info`` and ``https://sit
 Request attributes
 ********************
 To extract certain attributes from Falcon's request object and use them as span attributes, set the environment variable ``OTEL_PYTHON_FALCON_TRACED_REQUEST_ATTRS`` to a comma
-delimited list of request attribute names. 
+delimited list of request attribute names.
 
 For example,
 

instrumentation/opentelemetry-instrumentation-falcon/src/opentelemetry/instrumentation/falcon/__init__.py

@@ -26,7 +26,8 @@
 
 Exclude lists
 *************
-To exclude certain URLs from being tracked, set the environment variable ``OTEL_PYTHON_FALCON_EXCLUDED_URLS`` with comma delimited regexes representing which URLs to exclude.
+To exclude certain URLs from being tracked, set the environment variable ``OTEL_PYTHON_EXCLUDED_URLS`` or ``OTEL_PYTHON_FALCON_EXCLUDED_URLS``
+with comma delimited regexes representing which URLs to exclude.
 
 For example,
 

instrumentation/opentelemetry-instrumentation-fastapi/src/opentelemetry/instrumentation/fastapi/__init__.py

@@ -34,7 +34,8 @@ async def foobar():
 
 Exclude lists
 *************
-To exclude certain URLs from being tracked, set the environment variable ``OTEL_PYTHON_FASTAPI_EXCLUDED_URLS`` with comma delimited regexes representing which URLs to exclude.
+To exclude certain URLs from being tracked, set the environment variable ``OTEL_PYTHON_EXCLUDED_URLS`` or ``OTEL_PYTHON_FASTAPI_EXCLUDED_URLS``
+with comma delimited regexes representing which URLs to exclude.
 
 For example,
 

instrumentation/opentelemetry-instrumentation-flask/README.rst

@@ -21,7 +21,8 @@ Configuration
 
 Exclude lists
 *************
-To exclude certain URLs from being tracked, set the environment variable ``OTEL_PYTHON_FLASK_EXCLUDED_URLS`` with comma delimited regexes representing which URLs to exclude.
+To exclude certain URLs from being tracked, set the environment variable ``OTEL_PYTHON_EXCLUDED_URLS`` or ``OTEL_PYTHON_FLASK_EXCLUDED_URLS``
+with comma delimited regexes representing which URLs to exclude.
 
 For example,
 

instrumentation/opentelemetry-instrumentation-flask/src/opentelemetry/instrumentation/flask/__init__.py

@@ -48,7 +48,8 @@ def hello():
 
 Exclude lists
 *************
-To exclude certain URLs from being tracked, set the environment variable ``OTEL_PYTHON_FLASK_EXCLUDED_URLS`` with comma delimited regexes representing which URLs to exclude.
+To exclude certain URLs from being tracked, set the environment variable ``OTEL_PYTHON_EXCLUDED_URLS`` or ``OTEL_PYTHON_FLASK_EXCLUDED_URLS``
+with comma delimited regexes representing which URLs to exclude.
 
 For example,
 

instrumentation/opentelemetry-instrumentation-pyramid/src/opentelemetry/instrumentation/pyramid/__init__.py

@@ -79,7 +79,8 @@
 
 Exclude lists
 *************
-To exclude certain URLs from being tracked, set the environment variable ``OTEL_PYTHON_PYRAMID_EXCLUDED_URLS`` with comma delimited regexes representing which URLs to exclude.
+To exclude certain URLs from being tracked, set the environment variable ``OTEL_PYTHON_EXCLUDED_URLS`` or ``OTEL_PYTHON_PYRAMID_EXCLUDED_URLS``
+with comma delimited regexes representing which URLs to exclude.
 
 For example,
 

instrumentation/opentelemetry-instrumentation-requests/README.rst

@@ -15,13 +15,14 @@ Installation
 ::
 
      pip install opentelemetry-instrumentation-requests
-     
+
 Configuration
 -------------
 
 Exclude lists
 *************
-To exclude certain URLs from being tracked, set the environment variable ``OTEL_PYTHON_REQUESTS_EXCLUDED_URLS`` with comma delimited regexes representing which URLs to exclude.
+To exclude certain URLs from being tracked, set the environment variable ``OTEL_PYTHON_EXCLUDED_URLS`` or ``OTEL_PYTHON_REQUESTS_EXCLUDED_URLS``
+with comma delimited regexes representing which URLs to exclude.
 
 For example,
 

instrumentation/opentelemetry-instrumentation-requests/src/opentelemetry/instrumentation/requests/__init__.py

@@ -33,7 +33,8 @@
 
 Exclude lists
 *************
-To exclude certain URLs from being tracked, set the environment variable ``OTEL_PYTHON_REQUESTS_EXCLUDED_URLS`` with comma delimited regexes representing which URLs to exclude.
+To exclude certain URLs from being tracked, set the environment variable ``OTEL_PYTHON_EXCLUDED_URLS`` or ``OTEL_PYTHON_REQUESTS_EXCLUDED_URLS``
+with comma delimited regexes representing which URLs to exclude.
 
 For example,
 

instrumentation/opentelemetry-instrumentation-starlette/src/opentelemetry/instrumentation/starlette/__init__.py

@@ -36,7 +36,8 @@ def home(request):
 
 Exclude lists
 *************
-To exclude certain URLs from being tracked, set the environment variable ``OTEL_PYTHON_STARLETTE_EXCLUDED_URLS`` with comma delimited regexes representing which URLs to exclude.
+To exclude certain URLs from being tracked, set the environment variable ``OTEL_PYTHON_EXCLUDED_URLS`` or ``OTEL_PYTHON_STARLETTE_EXCLUDED_URLS``
+with comma delimited regexes representing which URLs to exclude.
 
 For example,
 

util/opentelemetry-util-http/src/opentelemetry/util/http/__init__.py

@@ -15,13 +15,14 @@
 from os import environ
 from re import compile as re_compile
 from re import search
+from typing import Iterable
 from urllib.parse import urlparse, urlunparse
 
 
 class ExcludeList:
     """Class to exclude certain paths (given as a list of regexes) from tracing requests"""
 
-    def __init__(self, excluded_urls):
+    def __init__(self, excluded_urls: Iterable[str]):
         self._excluded_urls = excluded_urls
         if self._excluded_urls:
             self._regex = re_compile("|".join(excluded_urls))
@@ -47,24 +48,28 @@ def get_traced_request_attrs(instrumentation):
     return traced_request_attrs
 
 
-def get_excluded_urls(instrumentation):
+def get_excluded_urls(instrumentation: str) -> ExcludeList:
     excluded_urls = environ.get(
-        _root.format(f"{instrumentation}_EXCLUDED_URLS"), []
+        _root.format(f"{instrumentation}_EXCLUDED_URLS"), ""
     )
+    if not excluded_urls:
+        excluded_urls = environ.get(_root.format("EXCLUDED_URLS"), "")
 
     return parse_excluded_urls(excluded_urls)
 
 
-def parse_excluded_urls(excluded_urls):
+def parse_excluded_urls(excluded_urls: str) -> ExcludeList:
     """
     Small helper to put an arbitrary url list inside of ExcludeList
     """
     if excluded_urls:
-        excluded_urls = [
+        excluded_url_list = [
             excluded_url.strip() for excluded_url in excluded_urls.split(",")
         ]
+    else:
+        excluded_url_list = []
 
-    return ExcludeList(excluded_urls)
+    return ExcludeList(excluded_url_list)
 
 
 def remove_url_credentials(url: str) -> str: