import os.path

import sys

from pando.http import status_strings

from pando.utils import utcnow

from liberapay.exceptions import LazyResponse

from liberapay.i18n.base import HTTP_ERRORS

python_dir = f"python{sys.version_info.major}.{sys.version_info.minor}"

project_root = website.project_root.rstrip(os.path.sep) + os.path.sep

def get_short_traceback(exception):

tb = getattr(exception, '__traceback__', None)

if tb:

r = []

for i in range(25):

frame = tb.tb_frame

filepath = frame.f_code.co_filename.split(os.path.sep)

try:

i = filepath.index(python_dir)

except Exception:

filepath = os.path.sep.join(filepath)

if filepath.startswith(project_root):

filepath = filepath.removeprefix(project_root)

else:

if filepath[i+1] == 'site-packages':

i += 1

filepath = os.path.sep.join(filepath[i+1:])

r.append(f'{filepath}:{tb.tb_lineno} ({frame.f_code.co_name})')

tb = tb.tb_next

if tb is None:

break

return '\n ' + '\n '.join(r)

else:

return ' none'

def render_cookies(request):

return '; '.join(

f"{name}=[{len(value)} bytes]" for name, value in request.cookies.items()

) or 'none'

[----------------------------------------]

sentry_ident = state.get('sentry_ident')

code = response.code

msg = _(HTTP_ERRORS[code]) if code in HTTP_ERRORS else status_strings.get(code, '')

if not msg:

website.tell_sentry(Warning(f"missing error message for HTTP code {code}"))

if isinstance(response, LazyResponse):

response.render_body(state)

err = response.text

if not err:

if code == 404:

err = _("The requested page couldn't be found.")

elif code == 500:

err = _("Looks like you've found a bug! Sorry for the inconvenience. We'll fix this error as soon as possible.")

else:

err = _("An unspecified error occured. This isn't supposed to happen. Sorry.")

debugging_info = None if sentry_ident else f"""\

URL: {website.canonical_scheme}://{request.hostname}{request.line.uri.decoded}

Method: {request.method}

Referer: {request.headers.get(b'Referer')!r}

User-Agent: {request.headers.get(b'User-Agent')!r}

Cookies: {render_cookies(request)}

IP address: {request.source} ({request.source_country})

Time: {utcnow()}

Response code: {code}

Response message: {err!r}

User: {user}

Locale: {locale}

Website version: {website.version}

Traceback:{get_short_traceback(response.__cause__ or response)}

"""

[----------------------------------------] text/html

% extends "templates/layouts/base.html"

% set title = '' if response.html_template is defined else msg

% block content

% if response.html_template is defined

% include response.html_template

% else

% if '\n' in err

<pre class="alert alert-danger">{{ err }}</pre>

% else

<div class="alert alert-danger">{{ err }}</div>

% endif

% if sentry_ident

<p>{{ _(

"The details of this error have been recorded. If you decide to "

"{link_start}contact us{link_end}, please include the following "

"error identification code in your message: {0}.",

'<code>%s</code>'|safe % sentry_ident,

link_start='<a href="/about/contact" target="_blank">'|safe,

link_end='</a>'|safe,

) }}</p>

% else

<p>{{ _(

"If you decide to {link_start}contact us{link_end} about this "

"issue, please include the following debugging information in "

"your message:",

link_start='<a href="/about/contact" target="_blank">'|safe,

link_end='</a>'|safe,

) }}</p>

<pre>{{ debugging_info }}</pre>

% endif

% endif

% endblock

[----------------------------------------] application/json via json_dump

{

"debugging_info": debugging_info,

"error_code": code,

"error_id": sentry_ident,

"error_message_long": err,

"error_message_short": msg,

"html_template": getattr(response, 'html_template', None),

}