Created
May 25, 2016 20:18
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Flask Error Handlers
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| #!/usr/bin/env python | |
| from flask import jsonify, current_app | |
| from werkzeug.datastructures import WWWAuthenticate | |
| from werkzeug.http import HTTP_STATUS_CODES | |
| from flask_principal import PermissionDenied | |
| def _make_errorhandler(code): | |
| def errorhandler(e): | |
| return jsonify({ | |
| 'message': HTTP_STATUS_CODES[code], | |
| 'status': code, | |
| }), code | |
| return errorhandler | |
| def unauthorized(e): | |
| data, status = _make_errorhandler(401)(e) | |
| r = Response('') | |
| www_auth = WWWAuthenticate() | |
| www_auth.type = 'Bearer' | |
| www_auth.realm = current_app.config['APP_NAME'] | |
| headers = { | |
| 'WWW-Authenticate': www_auth.to_header(), | |
| } | |
| return data, status, headers | |
| def unprocessable_entity(e): | |
| try: | |
| messages = e.data['exc'].messages | |
| except Exception: # pragma: no cover | |
| messages = ['Invalid Request'] | |
| return jsonify({ | |
| 'messages': messages, | |
| 'status': 422 | |
| }), 422 | |
| # Install default handlers | |
| handler_map = { | |
| code: _make_errorhandler(code) for code in HTTP_STATUS_CODES.iterkeys() | |
| } | |
| handler_map[401] = unauthorized | |
| handler_map[422] = unprocessable_entity | |
| handler_map[PermissionDenied] = handler_map[403] |
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