Technologies/Flask/flask.request.status_4xx
FlaskFlaskMetric

flask.request.status_4xx

4xx client error responses
Dimensions:None
Available on:DatadogDatadog (1)
Interface Metrics (1)
DatadogDatadog
Count of requests returning 4xx client error status codes
Dimensions:None
Sources
flask.request.status_4xxgithub.com

Technical Annotations (28)

Configuration Parameters (5)
url_prefixrecommended: '/users' or appropriate path
Prefix prepended to all Blueprint routes during registration
app.url_map.strict_slashesrecommended: False
Global setting to accept URLs with or without trailing slash
strict_slashesrecommended: False
Per-route parameter in @app.route() decorator
proxy_passrecommended: http://localhost:5000/api
Must include full path to preserve routing prefix
request.args
Query parameter access method that returns None for missing parameters
Error Signatures (9)
404 NOT FOUNDhttp status
301 MOVED PERMANENTLYhttp status
308 PERMANENT REDIRECThttp status
400http status
403http status
401http status
IndexError: list index out of rangeexception
500http status
404http status
CLI Commands (2)
flask routesdiagnostic
abort(404)remediation
Technical References (12)
Blueprintcomponentapp.register_blueprint()componentGunicorncomponentWSGIprotocolNginxcomponentproxy_passconfigurationabort()componentrequest.args.get()componentauthorizationconceptapp.logger.warningcomponentabortcomponent@app.errorhandler()component
Related Insights (11)
Blueprint not registered causes complete route unavailabilitycritical
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Trailing slash mismatch causes unexpected redirects or 404swarning
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Module with routes never imported causes route not foundcritical
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Gunicorn module path misconfiguration causes all routes to 404critical
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Nginx path stripping breaks Flask routingwarning
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Blueprint url_prefix misconfiguration causes wrong route pathwarning
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Missing required query parameters cause 400 Bad Requestwarning
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Permission violations cause 403 Forbidden errorswarning
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Authentication failures generate 401 Unauthorizedwarning
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IndexError on data access returns 500 instead of proper 404 statuswarning
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Custom error handlers missing causes generic unhelpful error pagesinfo
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