Show error page

Closes: #10
This commit is contained in:
Edward Betts 2023-11-25 14:27:47 +00:00
parent 06f2d7f804
commit b671843aea
3 changed files with 132 additions and 0 deletions

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@ -1,11 +1,15 @@
#!/usr/bin/python3
"""Reverse geocode: convert lat/lon to Wikidata item & Wikimedia Commons category."""
import inspect
import random
import socket
import sys
import traceback
import typing
import sqlalchemy.exc
import werkzeug.debug.tbtools
from flask import Flask, jsonify, redirect, render_template, request, url_for
from sqlalchemy.orm.query import Query
from werkzeug.wrappers import Response
@ -24,6 +28,33 @@ Tags = typing.Mapping[str, str]
logging_enabled = True
@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 = werkzeug.debug.tbtools.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 (
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,
)
def get_random_lat_lon() -> tuple[float, float]:
"""Select random lat/lon within the UK."""
south, east = 50.8520, 0.3536

78
static/css/exception.css Normal file
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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 */
}

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templates/show_error.html Normal file
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{% 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 %}