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"""Handle application level errors."""
import logging
import traceback
from werkzeug.exceptions import NotFound, HTTPException
from flask import (Flask,
request,
jsonify,
render_template)
from gn_auth.auth.errors import AuthorisationError
from .tracing import add_trace
from .http import http_error_handlers
logger = logging.getLogger(__name__)
__all__ = ["register_error_handlers"]
def handle_general_exception(exc: Exception):
"""Handle generic unhandled exceptions."""
logger.error("Error occurred!", exc_info=True)
content_type = request.content_type
if bool(content_type) and content_type.lower() == "application/json":
exc_args = [str(x) for x in exc.args]
msg = ("The following exception was raised while attempting to access "
f"{request.url}: {' '.join(exc_args)}")
return jsonify(add_trace(exc, {
"error": type(exc).__name__,
"error_description": msg
})), 500
return render_template("50x.html",
page=request.url,
error=exc,
trace=traceback.format_exception(exc)), 500
def handle_authorisation_error(exc: AuthorisationError):
"""Handle AuthorisationError if not handled anywhere else."""
logger.error("Error occurred!", exc_info=True)
logger.error(exc)
return jsonify(add_trace(exc, {
"error": type(exc).__name__,
"error_description": " :: ".join(exc.args)
})), exc.error_code
__error_handlers__ = {
Exception: handle_general_exception,
AuthorisationError: handle_authorisation_error
}
def register_error_handlers(app: Flask):
"""Register ALL defined error handlers"""
_handlers = {
**__error_handlers__,
**http_error_handlers()
}
for class_, error_handler in __error_handlers__.items():
app.register_error_handler(class_, error_handler)
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