Skip to main content

Attach a unique identifier to every WSGI request.

Project description

request-id

https://img.shields.io/pypi/v/request-id.svg https://img.shields.io/travis/mmerickel/request-id/master.svg

Attach a unique identifier to every request in your WSGI application.

request-id is implemented as a WSGI middleware.

The package will do 3 things:

  1. Generate a unique request_id identifier which will be stored in the WSGI environ and set as the X-Request-ID response header.

  2. Rename the processing thread with the request_id such that any log messages output by the logger have the request_id attached.

  3. Log the request to the Python stdlib logging library, which can be used to generate a simple access log.

Installation

You may install the request-id package using pip:

$ pip install request-id

Configure with PasteDeploy

Update your application INI to run in a pipeline with the request-id filter:

[app:myapp]
use = egg:myapp

[filter:request-id]
use = egg:request-id
format = {status} {REQUEST_METHOD:<6} {REQUEST_PATH:<60} {REQUEST_ID}

[pipeline:main]
pipeline =
  request-id
  myapp

[loggers]
keys = translogger

[handlers]
keys = translogger

[formatters]
keys = minimal

[logger_translogger]
level = INFO
handlers = translogger
qualname = request_id
propagate = 0

[handler_translogger]
class = StreamHandler
args = (sys.stderr,)
level = NOTSET
formatter = minimal

[formatter_minimal]
format = %(message)s

Configure in code

Create a RequestIdMiddleware object and compose it with your WSGI application:

from request_id import RequestIdMiddleware
from wsgiref.simple_server import make_server

def app(environ, start_response):
    start_response('200 OK', [('Content-Type', 'text/plain')])
    yield 'Hello World\n'

app = RequestIdMiddleware(
    app,
    format='{status} {REQUEST_METHOD:<6} {REQUEST_PATH:<60} {REQUEST_ID}',
)

if __name__ == '__main__':
    server = make_server('0.0.0.0', 8080, app)
    server.serve_forever()

Access the request_id

The request_id is stored in the request environ dictionary and may be accessed from anywhere this is available using request_id.get_request_id(request) where request is an instance of webob.request.Request.

Settings

logger_name

The name of the Python stdlib logger to which the log output will be delivered. Default: request_id

logging_level

The name of the Python stdlib logging level on which request information will be output. Default: INFO

format

A formatting string using PEP-3101 string format syntax. Possible options are:

  • REQUEST_ID

  • REMOTE_ADDR

  • REMOTE_USER

  • REQUEST_METHOD

  • REQUEST_URI

  • REQUEST_PATH

  • HTTP_HOST

  • HTTP_VERSION

  • HTTP_REFERER

  • HTTP_USER_AGENT

  • time

  • duration

  • bytes

  • status

Default: '{REMOTE_ADDR} {HTTP_HOST} {REMOTE_USER} [{time}] "{REQUEST_METHOD} {REQUEST_URI} {HTTP_VERSION}" {status} {bytes} {duration} "{HTTP_REFERER}" "{HTTP_USER_AGENT}" - {REQUEST_ID}

source_header

If not None then the request_id will be pulled from this header in the request. This is useful if another system upstream is setting a request identifier which you want to use in the WSGI application. Default: None

exclude_prefixes

A (space or line separated) list of URL paths to be ignored based on request.path_info. Paths should have a leading / in order to match properly. Default: None

Acknowledgements

This code is heavily based on the translogger middleware from Paste.

1.0.1 (2020-10-06)

  • Fix a bug in which exclude_prefixes was not matching in cases where the PATH_INFO in the WSGI environ was mutated while processing the request.

1.0 (2018-11-26)

  • Fix a bug in exclude_prefixes where it only matches the first request on Python 3.

0.3.1 (2017-11-26)

  • Fix changelog.

0.3 (2017-11-26)

  • Do not crash when the source header is missing. Instead set the request id to “-“.

  • Properly format the UTC offset in the {time} timestamp.

  • Add 100% test coverage.

0.2.1 (2016-11-03)

0.2 (2016-08-09)

  • Catch exceptions and return webob.exc.HTTPInternalServerError so that a request_id may be attached to the response.

0.1.2 (2016-07-26)

  • Fix a couple bugs with exclude_prefixes and add some docs for it.

0.1.1 (2016-07-26)

  • Add a new setting exclude_prefixes which can be used to avoid logging certain requests.

0.1.0 (2016-07-26)

  • Initial release.

Project details


Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Source Distribution

request-id-1.0.1.tar.gz (8.1 kB view hashes)

Uploaded Source

Built Distribution

request_id-1.0.1-py2.py3-none-any.whl (6.2 kB view hashes)

Uploaded Python 2 Python 3

Supported by

AWS AWS Cloud computing and Security Sponsor Datadog Datadog Monitoring Fastly Fastly CDN Google Google Download Analytics Microsoft Microsoft PSF Sponsor Pingdom Pingdom Monitoring Sentry Sentry Error logging StatusPage StatusPage Status page