starlette context

Middleware for Starlette that allows you to store and access the context data of a request. Can be used with logging so logs automatically use request headers such as x-request-id or x-correlation-id.

Resources:

• Source: https://github.com/tomwojcik/starlette-context
• Documentation: https://starlette-context.readthedocs.io/
• Changelog: https://starlette-context.readthedocs.io/en/latest/changelog.html

Installation

$ pip install starlette-context

Requirements

Python 3.7+

Dependencies

• starlette

All other dependencies from requirements-dev.txt are only needed to run tests or examples.

Example

import uvicorn

from starlette.applications import Starlette
from starlette.middleware import Middleware
from starlette.requests import Request
from starlette.responses import JSONResponse

from starlette_context import context, plugins
from starlette_context.middleware import RawContextMiddleware

middleware = [
    Middleware(
        RawContextMiddleware,
        plugins=(
            plugins.RequestIdPlugin(),
            plugins.CorrelationIdPlugin()
        )
    )
]

app = Starlette(middleware=middleware)


@app.route("/")
async def index(request: Request):
    return JSONResponse(context.data)


uvicorn.run(app, host="0.0.0.0")

In this example the response contains a json with

{
  "X-Correlation-ID":"5ca2f0b43115461bad07ccae5976a990",
  "X-Request-ID":"21f8d52208ec44948d152dc49a713fdd"
}

Context can be updated and accessed at anytime if it's created in the middleware.

Contribution

See the guide on read the docs.