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<p align="center"><h1>Django GUID</h1></p> | ||
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[![package version](https://img.shields.io/pypi/v/django-guid.svg)](https://pypi.org/pypi/django-guid) | ||
[![codecov](https://codecov.io/gh/snok/django-guid/branch/master/graph/badge.svg)](https://codecov.io/gh/snok/django-guid) | ||
[![downloads](https://img.shields.io/badge/python-3.7+-blue.svg)](https://pypi.python.org/pypi/django-guid#downloads) | ||
[![django versions](https://img.shields.io/pypi/djversions/django-guid?color=0C4B33&logo=django&logoColor=white&label=django)](https://pypi.python.org/pypi/django-guid) | ||
[![asgi](https://img.shields.io/badge/ASGI-supported-brightgreen.svg)](https://img.shields.io/badge/ASGI-supported-brightgreen.svg) | ||
[![wsgi](https://img.shields.io/badge/WSGI-supported-brightgreen.svg)](https://img.shields.io/badge/WSGI-supported-brightgreen.svg) | ||
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Django GUID loads or generates [correlation IDs](https://en.wikipedia.org/wiki/List_of_HTTP_header_fields?highlight=x-request-id#:~:text=Csrf%2DToken%3A%20i8XNjC4b8KVok4uw5RftR38Wgp2BFwql-,X%2DRequest%2DID,-%2C%5Bstackoverflow2%201) | ||
(also knows as request IDs) for incoming requests. Once an ID is defined, it may be attached to application | ||
logs as a filter. This makes it easy to correlate logs from a single HTTP request, and makes debugging simple. | ||
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For the purposes of this package, a GUID (globally unique identifier) is equivalent | ||
to a UUID (universally unique identifier). | ||
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## Examples | ||
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Here is an example, containing logs from 3 different requests, with a request-id filter: | ||
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```regexp | ||
INFO ... [773fa6885e03493498077a273d1b7f2d] project.views This is a DRF view log, and should have a GUID. | ||
WARNING ... [773fa6885e03493498077a273d1b7f2d] project.services.file Some warning in a function | ||
INFO ... [0d1c3919e46e4cd2b2f4ac9a187a8ea1] project.views This is a DRF view log, and should have a GUID. | ||
INFO ... [99d44111e9174c5a9494275aa7f28858] project.views This is a DRF view log, and should have a GUID. | ||
WARNING ... [0d1c3919e46e4cd2b2f4ac9a187a8ea1] project.services.file Some warning in a function | ||
WARNING ... [99d44111e9174c5a9494275aa7f28858] project.services.file Some warning in a function | ||
``` | ||
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The correlation ID makes it possible to tell which logs belong to which request. Here are the same logs, without the filter: | ||
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```regexp | ||
INFO ... project.views This is a DRF view log, and should have a GUID. | ||
WARNING ... project.services.file Some warning in a function | ||
INFO ... project.views This is a DRF view log, and should have a GUID. | ||
INFO ... project.views This is a DRF view log, and should have a GUID. | ||
WARNING ... project.services.file Some warning in a function | ||
WARNING ... project.services.file Some warning in a function | ||
``` | ||
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## Installation | ||
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```shell | ||
pip install django-guid | ||
``` | ||
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## Settings | ||
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Package settings are added in your `settings.py`: | ||
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```python | ||
DJANGO_GUID = { | ||
'GUID_HEADER_NAME': 'X-Request-ID', | ||
'VALIDATE_GUID': True, | ||
'RETURN_HEADER': True, | ||
'EXPOSE_HEADER': True, | ||
'INTEGRATIONS': [], | ||
'IGNORE_URLS': [], | ||
'UUID_LENGTH': 32, | ||
} | ||
``` | ||
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**Optional Parameters** | ||
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* `GUID_HEADER_NAME` | ||
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> The name of the GUID to look for in a header in an incoming request. Remember that it's case insensitive. | ||
Default: `Correlation-ID` | ||
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* `VALIDATE_GUID` | ||
> Whether the `GUID_HEADER_NAME` should be validated or not. | ||
If the GUID sent to through the header is not a valid GUID (`uuid.uuid4`). | ||
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Default: `True` | ||
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* `RETURN_HEADER` | ||
> Whether to return the GUID (Correlation-ID) as a header in the response or not. | ||
It will have the same name as the `GUID_HEADER_NAME` setting. | ||
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Default: `True` | ||
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* `EXPOSE_HEADER` | ||
> Whether to return `Access-Control-Expose-Headers` for the GUID header if | ||
`RETURN_HEADER` is `True`, has no effect if `RETURN_HEADER` is `False`. | ||
This is allows the JavaScript Fetch API to access the header when CORS is enabled. | ||
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Default: `True` | ||
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* `INTEGRATIONS` | ||
> Whether to enable any custom or available integrations with `django_guid`. | ||
As an example, using `SentryIntegration()` as an integration would set Sentry's `transaction_id` to | ||
match the GUID used by the middleware. | ||
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Default: `[]` | ||
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* `IGNORE_URLS` | ||
> URL endpoints where the middleware will be disabled. You can put your health check endpoints here. | ||
Default: `[]` | ||
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* `UUID_LENGTH` | ||
> Lets you optionally trim the length of the package generated UUIDs. | ||
Default: `32` | ||
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## Configuration | ||
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Once settings have set up, add the following to your projects' `settings.py`: | ||
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### 1. Installed apps | ||
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Add `django_guid` to your `INSTALLED_APPS`: | ||
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```python | ||
INSTALLED_APPS = [ | ||
'django_guid', | ||
] | ||
``` | ||
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### 2. Middleware | ||
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Add the `django_guid.middleware.guid_middleware` to your `MIDDLEWARE`: | ||
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```python | ||
MIDDLEWARE = [ | ||
'django_guid.middleware.guid_middleware', | ||
... | ||
] | ||
``` | ||
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It is recommended that you add the middleware at the top, so that the remaining middleware loggers include the requests GUID. | ||
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### 3. Logging configuration | ||
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Add `django_guid.log_filters.CorrelationId` as a filter in your `LOGGING` configuration: | ||
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```python | ||
LOGGING = { | ||
... | ||
'filters': { | ||
'correlation_id': { | ||
'()': 'django_guid.log_filters.CorrelationId' | ||
} | ||
} | ||
} | ||
``` | ||
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Put that filter in your handler: | ||
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```python | ||
LOGGING = { | ||
... | ||
'handlers': { | ||
'console': { | ||
'class': 'logging.StreamHandler', | ||
'formatter': 'medium', | ||
'filters': ['correlation_id'], | ||
} | ||
} | ||
} | ||
``` | ||
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And make sure to add the new `correlation_id` filter to one or all of your formatters: | ||
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```python | ||
LOGGING = { | ||
... | ||
'formatters': { | ||
'medium': { | ||
'format': '%(levelname)s %(asctime)s [%(correlation_id)s] %(name)s %(message)s' | ||
} | ||
} | ||
} | ||
``` | ||
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If these settings were confusing, you might find the repo examples helpful. | ||
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### 4. Django GUID logger (optional) | ||
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If you wish to see the Django GUID middleware outputs, you may configure a logger for the module. | ||
Simply add django_guid to your loggers in the project, like in the example below: | ||
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```python | ||
LOGGING = { | ||
... | ||
'loggers': { | ||
'django_guid': { | ||
'handlers': ['console', 'logstash'], | ||
'level': 'WARNING', | ||
'propagate': False, | ||
} | ||
} | ||
} | ||
``` | ||
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This could be useful for debugging problems with request ID propagation. If a received request header containing a request ID is misconfigured, we will not raise exceptions, but will generate warning logs. |