opentelemetry-instrumentation-httpx 0.65b0

OpenTelemetry HTTPX Instrumentation

This library allows tracing HTTP requests made by the httpx and httpx2 libraries.

If both libraries are installed, use HTTPXClientInstrumentor for httpx clients and HTTPX2ClientInstrumentor for httpx2 clients. The instrumentors can be enabled independently.

Installation

pip install opentelemetry-instrumentation-httpx

Usage

Instrumenting all clients

When using the instrumentor, all clients will automatically trace requests.

import httpx
import asyncio
from opentelemetry.instrumentation.httpx import HTTPXClientInstrumentor

url = "https://example.com"
HTTPXClientInstrumentor().instrument()

with httpx.Client() as client:
    response = client.get(url)

async def get(url):
    async with httpx.AsyncClient() as client:
        response = await client.get(url)

asyncio.run(get(url))

The same package also supports httpx2 using the HTTPX2ClientInstrumentor:

import httpx2
import asyncio
from opentelemetry.instrumentation.httpx import HTTPX2ClientInstrumentor

url = "https://example.com"
HTTPX2ClientInstrumentor().instrument()

with httpx2.Client() as client:
    response = client.get(url)

async def get(url):
    async with httpx2.AsyncClient() as client:
        response = await client.get(url)

asyncio.run(get(url))

Instrumenting single clients

If you only want to instrument requests for specific client instances, you can use the HTTPXClientInstrumentor.instrument_client method.

import httpx
import asyncio
from opentelemetry.instrumentation.httpx import HTTPXClientInstrumentor

url = "https://example.com"

with httpx.Client() as client:
    HTTPXClientInstrumentor.instrument_client(client)
    response = client.get(url)

async def get(url):
    async with httpx.AsyncClient() as client:
        HTTPXClientInstrumentor.instrument_client(client)
        response = await client.get(url)

asyncio.run(get(url))

For httpx2 clients, use HTTPX2ClientInstrumentor.instrument_client:

import httpx2
from opentelemetry.instrumentation.httpx import HTTPX2ClientInstrumentor

with httpx2.Client() as client:
    HTTPX2ClientInstrumentor.instrument_client(client)
    response = client.get("https://example.com")

Uninstrument

If you need to uninstrument clients, there are two options available.

import httpx
from opentelemetry.instrumentation.httpx import HTTPXClientInstrumentor

HTTPXClientInstrumentor().instrument()
client = httpx.Client()

# Uninstrument a specific client
HTTPXClientInstrumentor.uninstrument_client(client)

# Uninstrument all clients
HTTPXClientInstrumentor().uninstrument()

Using transports directly

If you don’t want to use the instrumentor class, you can use the transport classes directly.

import httpx
import asyncio
from opentelemetry.instrumentation.httpx import (
    AsyncOpenTelemetryTransport,
    SyncOpenTelemetryTransport,
)

url = "https://example.com"
transport = httpx.HTTPTransport()
telemetry_transport = SyncOpenTelemetryTransport(transport)

with httpx.Client(transport=telemetry_transport) as client:
    response = client.get(url)

transport = httpx.AsyncHTTPTransport()
telemetry_transport = AsyncOpenTelemetryTransport(transport)

async def get(url):
    async with httpx.AsyncClient(transport=telemetry_transport) as client:
        response = await client.get(url)

asyncio.run(get(url))

For httpx2 transports, use SyncOpenTelemetryTransportHttpx2 and AsyncOpenTelemetryTransportHttpx2:

import httpx2
from opentelemetry.instrumentation.httpx import SyncOpenTelemetryTransportHttpx2

transport = httpx2.HTTPTransport()
telemetry_transport = SyncOpenTelemetryTransportHttpx2(transport)

with httpx2.Client(transport=telemetry_transport) as client:
    response = client.get("https://example.com")

Request and response hooks

The instrumentation supports specifying request and response hooks. These are functions that get called back by the instrumentation right after a span is created for a request and right before the span is finished while processing a response.

Note

The request hook receives the raw arguments provided to the transport layer. The response hook receives the raw return values from the transport layer.

The hooks can be configured as follows:

from opentelemetry.instrumentation.httpx import HTTPXClientInstrumentor

def request_hook(span, request):
    # method, url, headers, stream, extensions = request
    pass

def response_hook(span, request, response):
    # method, url, headers, stream, extensions = request
    # status_code, headers, stream, extensions = response
    pass

async def async_request_hook(span, request):
    # method, url, headers, stream, extensions = request
    pass

async def async_response_hook(span, request, response):
    # method, url, headers, stream, extensions = request
    # status_code, headers, stream, extensions = response
    pass

HTTPXClientInstrumentor().instrument(
    request_hook=request_hook,
    response_hook=response_hook,
    async_request_hook=async_request_hook,
    async_response_hook=async_response_hook
)

Or if you are using the transport classes directly:

import httpx
from opentelemetry.instrumentation.httpx import SyncOpenTelemetryTransport, AsyncOpenTelemetryTransport

def request_hook(span, request):
    # method, url, headers, stream, extensions = request
    pass

def response_hook(span, request, response):
    # method, url, headers, stream, extensions = request
    # status_code, headers, stream, extensions = response
    pass

async def async_request_hook(span, request):
    # method, url, headers, stream, extensions = request
    pass

async def async_response_hook(span, request, response):
    # method, url, headers, stream, extensions = request
    # status_code, headers, stream, extensions = response
    pass

transport = httpx.HTTPTransport()
telemetry_transport = SyncOpenTelemetryTransport(
    transport,
    request_hook=request_hook,
    response_hook=response_hook
)

async_transport = httpx.AsyncHTTPTransport()
async_telemetry_transport = AsyncOpenTelemetryTransport(
    async_transport,
    request_hook=async_request_hook,
    response_hook=async_response_hook
)

References

• OpenTelemetry HTTPX Instrumentation

• OpenTelemetry Project