mirror of
https://github.com/janeczku/calibre-web
synced 2026-05-09 06:52:12 +00:00
Ozzie Isaacs
111 lines
4.7 KiB
Python
111 lines
4.7 KiB
Python
# -*- coding: utf-8 -*-
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# This file is part of the Calibre-Web (https://github.com/janeczku/calibre-web)
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# Copyright (C) 2018-2020 OzzieIsaacs
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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import traceback
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from flask import render_template, request, flash, make_response
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from flask_limiter import RateLimitExceeded
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from flask_babel import gettext as _
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from werkzeug.exceptions import default_exceptions
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try:
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from werkzeug.exceptions import FailedDependency
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except ImportError:
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from werkzeug.exceptions import UnprocessableEntity as FailedDependency
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from . import config, app, logger, services
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from .render_template import render_title_template
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from .web import render_login
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from .usermanagement import auth
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from cps.string_helper import strip_whitespaces
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log = logger.create()
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# custom error page
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def error_http(error):
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headers = {'WWW-Authenticate': 'Basic realm="calibre-web"'} if error.code == 401 else {}
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return render_template('http_error.html',
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error_code="Error {0}".format(error.code),
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error_name=error.name,
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issue=False,
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goto_admin=False,
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unconfigured=not config.db_configured,
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instance=config.config_calibre_web_title
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), error.code, headers
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def internal_error(error):
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if (isinstance(error.original_exception, AttributeError) and
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error.original_exception.args[0] == "'NoneType' object has no attribute 'query'"
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and error.original_exception.name == "query"):
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return render_template('http_error.html',
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error_code="Database Error",
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error_name='The library used is invalid or has permission errors',
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issue=False,
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goto_admin=True,
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unconfigured=False,
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error_stack="",
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instance=config.config_calibre_web_title
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), 500
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return render_template('http_error.html',
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error_code="500 Internal Server Error",
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error_name='The server encountered an internal error and was unable to complete your '
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'request. There is an error in the application.',
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issue=True,
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goto_admin=False,
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unconfigured=False,
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error_stack=traceback.format_exc().split("\n"),
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instance=config.config_calibre_web_title
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), 500
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def init_errorhandler():
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# http error handling
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for ex in default_exceptions:
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if ex < 500:
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app.register_error_handler(ex, error_http)
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elif ex == 500:
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app.register_error_handler(ex, internal_error)
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if services.ldap:
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# Only way of catching the LDAPException upon logging in with LDAP server down
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@app.errorhandler(services.ldap.LDAPException)
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# pylint: disable=unused-variable
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def handle_exception(e):
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log.debug('LDAP server not accessible while trying to login to opds feed')
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return error_http(FailedDependency())
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@app.errorhandler(RateLimitExceeded)
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def handle_rate_limit(__):
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log.error("Rate limit exceeded {}".format(request.endpoint))
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if "register" in request.endpoint:
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flash(_(u"Please wait one minute to register next user"), category="error")
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return render_title_template('register.html', config=config, title=_("Register"), page="register")
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elif "login" in request.endpoint:
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form = request.form.to_dict()
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username = strip_whitespaces(form.get('username', "")).lower().replace("\n", "").replace("\r", "")
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flash(_("Please wait one minute before next login"), category="error")
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return render_login(username, form.get("password", ""))
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elif "opds" in request.endpoint:
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return auth.auth_error_callback(429)
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else:
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return make_response('', 429)
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