Merge pull request #922 from timka/patch-1

Example logging X-Request-Id transparently

examples/log_request_id.py

@@ -0,0 +1,86 @@
+'''
+Based on example from https://github.com/Skyscanner/aiotask-context
+and `examples/{override_logging,run_async}.py`.
+
+Needs https://github.com/Skyscanner/aiotask-context/tree/52efbc21e2e1def2d52abb9a8e951f3ce5e6f690 or newer
+
+$ pip install git+https://github.com/Skyscanner/aiotask-context.git
+'''
+
+import asyncio
+import uuid
+import logging
+from signal import signal, SIGINT
+
+from sanic import Sanic
+from sanic import response
+
+import uvloop
+import aiotask_context as context
+
+log = logging.getLogger(__name__)
+
+
+class RequestIdFilter(logging.Filter):
+    def filter(self, record):
+        record.request_id = context.get('X-Request-ID')
+        return True
+
+
+LOG_SETTINGS = {
+    'version': 1,
+    'disable_existing_loggers': False,
+    'handlers': {
+        'console': {
+            'class': 'logging.StreamHandler',
+            'level': 'DEBUG',
+            'formatter': 'default',
+            'filters': ['requestid'],
+        },
+    },
+    'filters': {
+        'requestid': {
+            '()': RequestIdFilter,
+        },
+    },
+    'formatters': {
+        'default': {
+            'format': '%(asctime)s %(levelname)s %(name)s:%(lineno)d %(request_id)s | %(message)s',
+        },
+    },
+    'loggers': {
+        '': {
+            'level': 'DEBUG',
+            'handlers': ['console'],
+            'propagate': True
+        },
+    }
+}
+
+
+app = Sanic(__name__, log_config=LOG_SETTINGS)
+
+
+@app.middleware('request')
+async def set_request_id(request):
+    request_id = request.headers.get('X-Request-ID') or str(uuid.uuid4())
+    context.set("X-Request-ID", request_id)
+
+
+@app.route("/")
+async def test(request):
+    log.debug('X-Request-ID: %s', context.get('X-Request-ID'))
+    log.info('Hello from test!')
+    return response.json({"test": True})
+
+
+if __name__ == '__main__':
+    asyncio.set_event_loop(uvloop.new_event_loop())
+    server = app.create_server(host="0.0.0.0", port=8000)
+    loop = asyncio.get_event_loop()
+    loop.set_task_factory(context.task_factory)
+    task = asyncio.ensure_future(server)
+    try:
+        loop.run_forever()
+    except:
+        loop.stop()