OpenTelemetry urllib Instrumentation

This library allows tracing HTTP requests made by the urllib library.


from urllib import request
from opentelemetry.instrumentation.urllib import URLLibInstrumentor

# You can optionally pass a custom TracerProvider to
# URLLibInstrumentor().instrument()

req = request.Request('', method="POST")
r = request.urlopen(req)


Request/Response hooks

The urllib instrumentation supports extending tracing behavior with the help of request and response hooks. These are functions that are called back by the instrumentation right after a Span is created for a request and right before the span is finished processing a response respectively. The hooks can be configured as follows:

# `request_obj` is an instance of urllib.request.Request
def request_hook(span, request_obj):

# `request_obj` is an instance of urllib.request.Request
# `response` is an instance of http.client.HTTPResponse
def response_hook(span, request_obj, response)

    request_hook=request_hook, response_hook=response_hook)

Exclude lists

To exclude certain URLs from being tracked, set the environment variable OTEL_PYTHON_URLLIB_EXCLUDED_URLS (or OTEL_PYTHON_EXCLUDED_URLS as fallback) with comma delimited regexes representing which URLs to exclude.

For example,

export OTEL_PYTHON_URLLIB_EXCLUDED_URLS="client/.*/info,healthcheck"

will exclude requests such as https://site/client/123/info and https://site/xyz/healthcheck.


class opentelemetry.instrumentation.urllib.URLLibInstrumentor(*args, **kwargs)[source]

Bases: BaseInstrumentor

An instrumentor for urllib See BaseInstrumentor


Return a list of python packages with versions that the will be instrumented.

The format should be the same as used in requirements.txt or pyproject.toml.

For example, if an instrumentation instruments requests 1.x, this method should look like: :rtype: Collection[str]

def instrumentation_dependencies(self) -> Collection[str]:

return [‘requests ~= 1.0’]

This will ensure that the instrumentation will only be used when the specified library is present in the environment.


uninstrument_opener a specific instance of urllib.request.OpenerDirector