Show errors, even in production.

This commit is contained in:
Edward Betts 2023-09-09 17:06:01 +03:00
parent 60708b5bb7
commit af1640abec
3 changed files with 134 additions and 1 deletions

34
main.py
View file

@ -2,19 +2,51 @@
"""Find photos on flickr for Wikipedia articls and contact the photographer.""" """Find photos on flickr for Wikipedia articls and contact the photographer."""
import collections import collections
import inspect
import json import json
import sys
import traceback
import typing import typing
from urllib.parse import unquote from urllib.parse import unquote
import flask import flask
import requests import requests
import werkzeug
from werkzeug.debug.tbtools import DebugTraceback
app = flask.Flask(__name__) app = flask.Flask(__name__)
app.debug = True app.debug = False
enwiki = "en.wikipedia.org/wiki/" enwiki = "en.wikipedia.org/wiki/"
@app.errorhandler(werkzeug.exceptions.InternalServerError)
def exception_handler(e: werkzeug.exceptions.InternalServerError) -> tuple[str, int]:
"""Handle exception."""
exec_type, exc_value, current_traceback = sys.exc_info()
assert exc_value
tb = DebugTraceback(exc_value)
summary = tb.render_traceback_html(include_title=False)
exc_lines = "".join(tb._te.format_exception_only())
last_frame = list(traceback.walk_tb(current_traceback))[-1][0]
last_frame_args = inspect.getargs(last_frame.f_code)
return (
flask.render_template(
"show_error.html",
plaintext=tb.render_traceback_text(),
exception=exc_lines,
exception_type=tb._te.exc_type.__name__,
summary=summary,
last_frame=last_frame,
last_frame_args=last_frame_args,
),
500,
)
@app.route("/") @app.route("/")
def start() -> str: def start() -> str:
"""Start form.""" """Start form."""

78
static/css/exception.css Normal file
View file

@ -0,0 +1,78 @@
div.debugger { text-align: left; padding: 12px; margin: auto;
background-color: white; }
div.detail { cursor: pointer; }
div.detail p { margin: 0 0 8px 13px; font-size: 14px; white-space: pre-wrap;
font-family: monospace; }
div.explanation { margin: 20px 13px; font-size: 15px; color: #555; }
div.footer { font-size: 13px; text-align: right; margin: 30px 0;
color: #86989B; }
h2 { font-size: 16px; margin: 1.3em 0 0.0 0; padding: 9px;
background-color: #11557C; color: white; }
h2 em, h3 em { font-style: normal; color: #A5D6D9; font-weight: normal; }
div.traceback, div.plain { border: 1px solid #ddd; margin: 0 0 1em 0; padding: 10px; }
div.plain p { margin: 0; }
div.plain textarea,
div.plain pre { margin: 10px 0 0 0; padding: 4px;
background-color: #E8EFF0; border: 1px solid #D3E7E9; }
div.plain textarea { width: 99%; height: 300px; }
div.traceback h3 { font-size: 1em; margin: 0 0 0.8em 0; }
div.traceback ul { list-style: none; margin: 0; padding: 0 0 0 1em; }
div.traceback h4 { font-size: 13px; font-weight: normal; margin: 0.7em 0 0.1em 0; }
div.traceback pre { margin: 0; padding: 5px 0 3px 15px;
background-color: #E8EFF0; border: 1px solid #D3E7E9; }
div.traceback .library .current { background: white; color: #555; }
div.traceback .expanded .current { background: #E8EFF0; color: black; }
div.traceback pre:hover { background-color: #DDECEE; color: black; cursor: pointer; }
div.traceback div.source.expanded pre + pre { border-top: none; }
div.traceback span.ws { display: none; }
div.traceback pre.before, div.traceback pre.after { display: none; background: white; }
div.traceback div.source.expanded pre.before,
div.traceback div.source.expanded pre.after {
display: block;
}
div.traceback div.source.expanded span.ws {
display: inline;
}
div.traceback blockquote { margin: 1em 0 0 0; padding: 0; white-space: pre-line; }
div.traceback img { float: right; padding: 2px; margin: -3px 2px 0 0; display: none; }
div.traceback img:hover { background-color: #ddd; cursor: pointer;
border-color: #BFDDE0; }
div.traceback pre:hover img { display: block; }
div.traceback cite.filename { font-style: normal; color: #3B666B; }
pre.console { border: 1px solid #ccc; background: white!important;
color: black; padding: 5px!important;
margin: 3px 0 0 0!important; cursor: default!important;
max-height: 400px; overflow: auto; }
pre.console form { color: #555; }
pre.console input { background-color: transparent; color: #555;
width: 90%; font-family: 'Consolas', 'Deja Vu Sans Mono',
'Bitstream Vera Sans Mono', monospace; font-size: 14px;
border: none!important; }
span.string { color: #30799B; }
span.number { color: #9C1A1C; }
span.help { color: #3A7734; }
span.object { color: #485F6E; }
span.extended { opacity: 0.5; }
span.extended:hover { opacity: 1; }
a.toggle { text-decoration: none; background-repeat: no-repeat;
background-position: center center;
background-image: url(?__debugger__=yes&cmd=resource&f=more.png); }
a.toggle:hover { background-color: #444; }
a.open { background-image: url(?__debugger__=yes&cmd=resource&f=less.png); }
div.traceback pre, div.console pre {
white-space: pre-wrap; /* css-3 should we be so lucky... */
white-space: -moz-pre-wrap; /* Mozilla, since 1999 */
white-space: -pre-wrap; /* Opera 4-6 ?? */
white-space: -o-pre-wrap; /* Opera 7 ?? */
word-wrap: break-word; /* Internet Explorer 5.5+ */
_white-space: pre; /* IE only hack to re-specify in
addition to word-wrap */
}

23
templates/show_error.html Normal file
View file

@ -0,0 +1,23 @@
{% extends "base.html" %}
{% block style %}
<link rel="stylesheet" href="{{url_for('static', filename='css/exception.css')}}" />
{% endblock %}
{% block content %}
<div class="p-2">
<h1>Software error: {{ exception_type }}</h1>
<div>
<pre>{{ exception }}</pre>
</div>
<h2 class="traceback">Traceback <em>(most recent call last)</em></h2>
{{ summary | safe }}
<p>Error in function "{{ last_frame.f_code.co_name }}": {{ last_frame_args | pprint }}</p>
<pre>{{ last_frame.f_locals | pprint }}</pre>
</div>
{% endblock %}