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"""Application error handling."""
import traceback
from werkzeug.exceptions import HTTPException
import MySQLdb as mdb
from flask import Flask, request, render_template, current_app as app
def handle_general_exception(exc: Exception):
"""Handle generic exceptions."""
trace = traceback.format_exc()
app.logger.error(
"Error (%s.%s): Generic unhandled exception!! (URI: %s)\n%s",
exc.__class__.__module__, exc.__class__.__name__, request.url, trace)
return render_template("unhandled_exception.html", trace=trace), 500
def handle_http_exception(exc: HTTPException):
"""Handle HTTP exceptions."""
app.logger.error(
"HTTP Error %s: %s", exc.code, exc.description, exc_info=True)
return render_template("http-error.html",
request_url=request.url,
exc=exc,
trace=traceback.format_exception(exc)), exc.code
def register_error_handlers(appl: Flask):
"""Register top-level error/exception handlers."""
appl.register_error_handler(Exception, handle_general_exception)
appl.register_error_handler(HTTPException, handle_http_exception)
appl.register_error_handler(mdb.MySQLError, handle_general_exception)
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