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author | S. Solomon Darnell | 2025-03-28 21:52:21 -0500 |
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committer | S. Solomon Darnell | 2025-03-28 21:52:21 -0500 |
commit | 4a52a71956a8d46fcb7294ac71734504bb09bcc2 (patch) | |
tree | ee3dc5af3b6313e921cd920906356f5d4febc4ed /.venv/lib/python3.12/site-packages/opentelemetry/instrumentation/fastapi/__init__.py | |
parent | cc961e04ba734dd72309fb548a2f97d67d578813 (diff) | |
download | gn-ai-master.tar.gz |
Diffstat (limited to '.venv/lib/python3.12/site-packages/opentelemetry/instrumentation/fastapi/__init__.py')
-rw-r--r-- | .venv/lib/python3.12/site-packages/opentelemetry/instrumentation/fastapi/__init__.py | 456 |
1 files changed, 456 insertions, 0 deletions
diff --git a/.venv/lib/python3.12/site-packages/opentelemetry/instrumentation/fastapi/__init__.py b/.venv/lib/python3.12/site-packages/opentelemetry/instrumentation/fastapi/__init__.py new file mode 100644 index 00000000..a19480b2 --- /dev/null +++ b/.venv/lib/python3.12/site-packages/opentelemetry/instrumentation/fastapi/__init__.py @@ -0,0 +1,456 @@ +# 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. + +""" +Usage +----- + +.. code-block:: python + + import fastapi + from opentelemetry.instrumentation.fastapi import FastAPIInstrumentor + + app = fastapi.FastAPI() + + @app.get("/foobar") + async def foobar(): + return {"message": "hello world"} + + FastAPIInstrumentor.instrument_app(app) + +Configuration +------------- + +Exclude lists +************* +To exclude certain URLs from tracking, set the environment variable ``OTEL_PYTHON_FASTAPI_EXCLUDED_URLS`` +(or ``OTEL_PYTHON_EXCLUDED_URLS`` to cover all instrumentations) to a string of comma delimited regexes that match the +URLs. + +For example, + +:: + + export OTEL_PYTHON_FASTAPI_EXCLUDED_URLS="client/.*/info,healthcheck" + +will exclude requests such as ``https://site/client/123/info`` and ``https://site/xyz/healthcheck``. + +You can also pass comma delimited regexes directly to the ``instrument_app`` method: + +.. code-block:: python + + FastAPIInstrumentor.instrument_app(app, excluded_urls="client/.*/info,healthcheck") + +Request/Response hooks +********************** + +This instrumentation supports request and response hooks. These are functions that get called +right after a span is created for a request and right before the span is finished for the response. + +- The server request hook is passed a server span and ASGI scope object for every incoming request. +- The client request hook is called with the internal span, and ASGI scope and event when the method ``receive`` is called. +- The client response hook is called with the internal span, and ASGI scope and event when the method ``send`` is called. + +.. code-block:: python + + def server_request_hook(span: Span, scope: dict[str, Any]): + if span and span.is_recording(): + span.set_attribute("custom_user_attribute_from_request_hook", "some-value") + + def client_request_hook(span: Span, scope: dict[str, Any], message: dict[str, Any]): + if span and span.is_recording(): + span.set_attribute("custom_user_attribute_from_client_request_hook", "some-value") + + def client_response_hook(span: Span, scope: dict[str, Any], message: dict[str, Any]): + if span and span.is_recording(): + span.set_attribute("custom_user_attribute_from_response_hook", "some-value") + + FastAPIInstrumentor().instrument(server_request_hook=server_request_hook, client_request_hook=client_request_hook, client_response_hook=client_response_hook) + +Capture HTTP request and response headers +***************************************** +You can configure the agent to capture specified HTTP headers as span attributes, according to the +`semantic convention <https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/trace/semantic_conventions/http.md#http-request-and-response-headers>`_. + +Request headers +*************** +To capture HTTP request headers as span attributes, set the environment variable +``OTEL_INSTRUMENTATION_HTTP_CAPTURE_HEADERS_SERVER_REQUEST`` to a comma delimited list of HTTP header names, +or pass the ``http_capture_headers_server_request`` keyword argument to the ``instrument_app`` method. + +For example using the environment variable, +:: + + export OTEL_INSTRUMENTATION_HTTP_CAPTURE_HEADERS_SERVER_REQUEST="content-type,custom_request_header" + +will extract ``content-type`` and ``custom_request_header`` from the request headers and add them as span attributes. + +Request header names in FastAPI are case-insensitive. So, giving the header name as ``CUStom-Header`` in the environment +variable will capture the header named ``custom-header``. + +Regular expressions may also be used to match multiple headers that correspond to the given pattern. For example: +:: + + export OTEL_INSTRUMENTATION_HTTP_CAPTURE_HEADERS_SERVER_REQUEST="Accept.*,X-.*" + +Would match all request headers that start with ``Accept`` and ``X-``. + +To capture all request headers, set ``OTEL_INSTRUMENTATION_HTTP_CAPTURE_HEADERS_SERVER_REQUEST`` to ``".*"``. +:: + + export OTEL_INSTRUMENTATION_HTTP_CAPTURE_HEADERS_SERVER_REQUEST=".*" + +The name of the added span attribute will follow the format ``http.request.header.<header_name>`` where ``<header_name>`` +is the normalized HTTP header name (lowercase, with ``-`` replaced by ``_``). The value of the attribute will be a +single item list containing all the header values. + +For example: +``http.request.header.custom_request_header = ["<value1>", "<value2>"]`` + +Response headers +**************** +To capture HTTP response headers as span attributes, set the environment variable +``OTEL_INSTRUMENTATION_HTTP_CAPTURE_HEADERS_SERVER_RESPONSE`` to a comma delimited list of HTTP header names, +or pass the ``http_capture_headers_server_response`` keyword argument to the ``instrument_app`` method. + +For example using the environment variable, +:: + + export OTEL_INSTRUMENTATION_HTTP_CAPTURE_HEADERS_SERVER_RESPONSE="content-type,custom_response_header" + +will extract ``content-type`` and ``custom_response_header`` from the response headers and add them as span attributes. + +Response header names in FastAPI are case-insensitive. So, giving the header name as ``CUStom-Header`` in the environment +variable will capture the header named ``custom-header``. + +Regular expressions may also be used to match multiple headers that correspond to the given pattern. For example: +:: + + export OTEL_INSTRUMENTATION_HTTP_CAPTURE_HEADERS_SERVER_RESPONSE="Content.*,X-.*" + +Would match all response headers that start with ``Content`` and ``X-``. + +To capture all response headers, set ``OTEL_INSTRUMENTATION_HTTP_CAPTURE_HEADERS_SERVER_RESPONSE`` to ``".*"``. +:: + + export OTEL_INSTRUMENTATION_HTTP_CAPTURE_HEADERS_SERVER_RESPONSE=".*" + +The name of the added span attribute will follow the format ``http.response.header.<header_name>`` where ``<header_name>`` +is the normalized HTTP header name (lowercase, with ``-`` replaced by ``_``). The value of the attribute will be a +list containing the header values. + +For example: +``http.response.header.custom_response_header = ["<value1>", "<value2>"]`` + +Sanitizing headers +****************** +In order to prevent storing sensitive data such as personally identifiable information (PII), session keys, passwords, +etc, set the environment variable ``OTEL_INSTRUMENTATION_HTTP_CAPTURE_HEADERS_SANITIZE_FIELDS`` +to a comma delimited list of HTTP header names to be sanitized, or pass the ``http_capture_headers_sanitize_fields`` +keyword argument to the ``instrument_app`` method. + +Regexes may be used, and all header names will be matched in a case-insensitive manner. + +For example using the environment variable, +:: + + export OTEL_INSTRUMENTATION_HTTP_CAPTURE_HEADERS_SANITIZE_FIELDS=".*session.*,set-cookie" + +will replace the value of headers such as ``session-id`` and ``set-cookie`` with ``[REDACTED]`` in the span. + +Note: + The environment variable names used to capture HTTP headers are still experimental, and thus are subject to change. + +API +--- +""" + +from __future__ import annotations + +import logging +from typing import Collection, Literal + +import fastapi +from starlette.routing import Match + +from opentelemetry.instrumentation._semconv import ( + _get_schema_url, + _OpenTelemetrySemanticConventionStability, + _OpenTelemetryStabilitySignalType, + _StabilityMode, +) +from opentelemetry.instrumentation.asgi import OpenTelemetryMiddleware +from opentelemetry.instrumentation.asgi.types import ( + ClientRequestHook, + ClientResponseHook, + ServerRequestHook, +) +from opentelemetry.instrumentation.fastapi.package import _instruments +from opentelemetry.instrumentation.fastapi.version import __version__ +from opentelemetry.instrumentation.instrumentor import BaseInstrumentor +from opentelemetry.metrics import get_meter +from opentelemetry.semconv.trace import SpanAttributes +from opentelemetry.trace import get_tracer +from opentelemetry.util.http import ( + get_excluded_urls, + parse_excluded_urls, + sanitize_method, +) + +_excluded_urls_from_env = get_excluded_urls("FASTAPI") +_logger = logging.getLogger(__name__) + + +class FastAPIInstrumentor(BaseInstrumentor): + """An instrumentor for FastAPI + + See `BaseInstrumentor` + """ + + _original_fastapi = None + + @staticmethod + def instrument_app( + app, + server_request_hook: ServerRequestHook = None, + client_request_hook: ClientRequestHook = None, + client_response_hook: ClientResponseHook = None, + tracer_provider=None, + meter_provider=None, + excluded_urls=None, + http_capture_headers_server_request: list[str] | None = None, + http_capture_headers_server_response: list[str] | None = None, + http_capture_headers_sanitize_fields: list[str] | None = None, + exclude_spans: list[Literal["receive", "send"]] | None = None, + ): + """Instrument an uninstrumented FastAPI application. + + Args: + app: The fastapi ASGI application callable to forward requests to. + server_request_hook: Optional callback which is called with the server span and ASGI + scope object for every incoming request. + client_request_hook: Optional callback which is called with the internal span, and ASGI + scope and event which are sent as dictionaries for when the method receive is called. + client_response_hook: Optional callback which is called with the internal span, and ASGI + scope and event which are sent as dictionaries for when the method send is called. + tracer_provider: The optional tracer provider to use. If omitted + the current globally configured one is used. + meter_provider: The optional meter provider to use. If omitted + the current globally configured one is used. + excluded_urls: Optional comma delimited string of regexes to match URLs that should not be traced. + http_capture_headers_server_request: Optional list of HTTP headers to capture from the request. + http_capture_headers_server_response: Optional list of HTTP headers to capture from the response. + http_capture_headers_sanitize_fields: Optional list of HTTP headers to sanitize. + exclude_spans: Optionally exclude HTTP `send` and/or `receive` spans from the trace. + """ + if not hasattr(app, "_is_instrumented_by_opentelemetry"): + app._is_instrumented_by_opentelemetry = False + + if not getattr(app, "_is_instrumented_by_opentelemetry", False): + # initialize semantic conventions opt-in if needed + _OpenTelemetrySemanticConventionStability._initialize() + sem_conv_opt_in_mode = _OpenTelemetrySemanticConventionStability._get_opentelemetry_stability_opt_in_mode( + _OpenTelemetryStabilitySignalType.HTTP, + ) + if excluded_urls is None: + excluded_urls = _excluded_urls_from_env + else: + excluded_urls = parse_excluded_urls(excluded_urls) + tracer = get_tracer( + __name__, + __version__, + tracer_provider, + schema_url=_get_schema_url(sem_conv_opt_in_mode), + ) + meter = get_meter( + __name__, + __version__, + meter_provider, + schema_url=_get_schema_url(sem_conv_opt_in_mode), + ) + + app.add_middleware( + OpenTelemetryMiddleware, + excluded_urls=excluded_urls, + default_span_details=_get_default_span_details, + server_request_hook=server_request_hook, + client_request_hook=client_request_hook, + client_response_hook=client_response_hook, + # Pass in tracer/meter to get __name__and __version__ of fastapi instrumentation + tracer=tracer, + meter=meter, + http_capture_headers_server_request=http_capture_headers_server_request, + http_capture_headers_server_response=http_capture_headers_server_response, + http_capture_headers_sanitize_fields=http_capture_headers_sanitize_fields, + exclude_spans=exclude_spans, + ) + app._is_instrumented_by_opentelemetry = True + if app not in _InstrumentedFastAPI._instrumented_fastapi_apps: + _InstrumentedFastAPI._instrumented_fastapi_apps.add(app) + else: + _logger.warning( + "Attempting to instrument FastAPI app while already instrumented" + ) + + @staticmethod + def uninstrument_app(app: fastapi.FastAPI): + app.user_middleware = [ + x + for x in app.user_middleware + if x.cls is not OpenTelemetryMiddleware + ] + app.middleware_stack = app.build_middleware_stack() + app._is_instrumented_by_opentelemetry = False + + def instrumentation_dependencies(self) -> Collection[str]: + return _instruments + + def _instrument(self, **kwargs): + self._original_fastapi = fastapi.FastAPI + _InstrumentedFastAPI._tracer_provider = kwargs.get("tracer_provider") + _InstrumentedFastAPI._server_request_hook = kwargs.get( + "server_request_hook" + ) + _InstrumentedFastAPI._client_request_hook = kwargs.get( + "client_request_hook" + ) + _InstrumentedFastAPI._client_response_hook = kwargs.get( + "client_response_hook" + ) + _InstrumentedFastAPI._http_capture_headers_server_request = kwargs.get( + "http_capture_headers_server_request" + ) + _InstrumentedFastAPI._http_capture_headers_server_response = ( + kwargs.get("http_capture_headers_server_response") + ) + _InstrumentedFastAPI._http_capture_headers_sanitize_fields = ( + kwargs.get("http_capture_headers_sanitize_fields") + ) + _excluded_urls = kwargs.get("excluded_urls") + _InstrumentedFastAPI._excluded_urls = ( + _excluded_urls_from_env + if _excluded_urls is None + else parse_excluded_urls(_excluded_urls) + ) + _InstrumentedFastAPI._meter_provider = kwargs.get("meter_provider") + _InstrumentedFastAPI._exclude_spans = kwargs.get("exclude_spans") + fastapi.FastAPI = _InstrumentedFastAPI + + def _uninstrument(self, **kwargs): + for instance in _InstrumentedFastAPI._instrumented_fastapi_apps: + self.uninstrument_app(instance) + _InstrumentedFastAPI._instrumented_fastapi_apps.clear() + fastapi.FastAPI = self._original_fastapi + + +class _InstrumentedFastAPI(fastapi.FastAPI): + _tracer_provider = None + _meter_provider = None + _excluded_urls = None + _server_request_hook: ServerRequestHook = None + _client_request_hook: ClientRequestHook = None + _client_response_hook: ClientResponseHook = None + _instrumented_fastapi_apps = set() + _sem_conv_opt_in_mode = _StabilityMode.DEFAULT + + def __init__(self, *args, **kwargs): + super().__init__(*args, **kwargs) + tracer = get_tracer( + __name__, + __version__, + _InstrumentedFastAPI._tracer_provider, + schema_url=_get_schema_url( + _InstrumentedFastAPI._sem_conv_opt_in_mode + ), + ) + meter = get_meter( + __name__, + __version__, + _InstrumentedFastAPI._meter_provider, + schema_url=_get_schema_url( + _InstrumentedFastAPI._sem_conv_opt_in_mode + ), + ) + self.add_middleware( + OpenTelemetryMiddleware, + excluded_urls=_InstrumentedFastAPI._excluded_urls, + default_span_details=_get_default_span_details, + server_request_hook=_InstrumentedFastAPI._server_request_hook, + client_request_hook=_InstrumentedFastAPI._client_request_hook, + client_response_hook=_InstrumentedFastAPI._client_response_hook, + # Pass in tracer/meter to get __name__and __version__ of fastapi instrumentation + tracer=tracer, + meter=meter, + http_capture_headers_server_request=_InstrumentedFastAPI._http_capture_headers_server_request, + http_capture_headers_server_response=_InstrumentedFastAPI._http_capture_headers_server_response, + http_capture_headers_sanitize_fields=_InstrumentedFastAPI._http_capture_headers_sanitize_fields, + exclude_spans=_InstrumentedFastAPI._exclude_spans, + ) + self._is_instrumented_by_opentelemetry = True + _InstrumentedFastAPI._instrumented_fastapi_apps.add(self) + + def __del__(self): + if self in _InstrumentedFastAPI._instrumented_fastapi_apps: + _InstrumentedFastAPI._instrumented_fastapi_apps.remove(self) + + +def _get_route_details(scope): + """ + Function to retrieve Starlette route from scope. + + TODO: there is currently no way to retrieve http.route from + a starlette application from scope. + See: https://github.com/encode/starlette/pull/804 + + Args: + scope: A Starlette scope + Returns: + A string containing the route or None + """ + app = scope["app"] + route = None + + for starlette_route in app.routes: + match, _ = starlette_route.matches(scope) + if match == Match.FULL: + route = starlette_route.path + break + if match == Match.PARTIAL: + route = starlette_route.path + return route + + +def _get_default_span_details(scope): + """ + Callback to retrieve span name and attributes from scope. + + Args: + scope: A Starlette scope + Returns: + A tuple of span name and attributes + """ + route = _get_route_details(scope) + method = sanitize_method(scope.get("method", "").strip()) + attributes = {} + if method == "_OTHER": + method = "HTTP" + if route: + attributes[SpanAttributes.HTTP_ROUTE] = route + if method and route: # http + span_name = f"{method} {route}" + elif route: # websocket + span_name = route + else: # fallback + span_name = method + return span_name, attributes |