511 lines
16 KiB
Python
511 lines
16 KiB
Python
# -*- coding: utf-8 -*-
|
|
"""
|
|
werkzeug.debug.tbtools
|
|
~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
This module provides various traceback related utility functions.
|
|
|
|
:copyright: (c) 2014 by the Werkzeug Team, see AUTHORS for more details.
|
|
:license: BSD.
|
|
"""
|
|
import re
|
|
|
|
import os
|
|
import sys
|
|
import json
|
|
import inspect
|
|
import traceback
|
|
import codecs
|
|
from tokenize import TokenError
|
|
|
|
from werkzeug.utils import cached_property, escape
|
|
from werkzeug.debug.console import Console
|
|
from werkzeug._compat import range_type, PY2, text_type, string_types, \
|
|
to_native, to_unicode
|
|
|
|
|
|
_coding_re = re.compile(br'coding[:=]\s*([-\w.]+)')
|
|
_line_re = re.compile(br'^(.*?)$(?m)')
|
|
_funcdef_re = re.compile(r'^(\s*def\s)|(.*(?<!\w)lambda(:|\s))|^(\s*@)')
|
|
UTF8_COOKIE = b'\xef\xbb\xbf'
|
|
|
|
system_exceptions = (SystemExit, KeyboardInterrupt)
|
|
try:
|
|
system_exceptions += (GeneratorExit,)
|
|
except NameError:
|
|
pass
|
|
|
|
|
|
HEADER = u'''\
|
|
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
|
|
"http://www.w3.org/TR/html4/loose.dtd">
|
|
<html>
|
|
<head>
|
|
<title>%(title)s // Werkzeug Debugger</title>
|
|
<link rel="stylesheet" href="?__debugger__=yes&cmd=resource&f=style.css" type="text/css">
|
|
<!-- We need to make sure this has a favicon so that the debugger does not by
|
|
accident trigger a request to /favicon.ico which might change the application
|
|
state. -->
|
|
<link rel="shortcut icon" href="?__debugger__=yes&cmd=resource&f=console.png">
|
|
<script type="text/javascript" src="?__debugger__=yes&cmd=resource&f=jquery.js"></script>
|
|
<script type="text/javascript" src="?__debugger__=yes&cmd=resource&f=debugger.js"></script>
|
|
<script type="text/javascript">
|
|
var TRACEBACK = %(traceback_id)d,
|
|
CONSOLE_MODE = %(console)s,
|
|
EVALEX = %(evalex)s,
|
|
SECRET = "%(secret)s";
|
|
</script>
|
|
</head>
|
|
<body>
|
|
<div class="debugger">
|
|
'''
|
|
FOOTER = u'''\
|
|
<div class="footer">
|
|
Brought to you by <strong class="arthur">DON'T PANIC</strong>, your
|
|
friendly Werkzeug powered traceback interpreter.
|
|
</div>
|
|
</div>
|
|
</body>
|
|
</html>
|
|
'''
|
|
|
|
PAGE_HTML = HEADER + u'''\
|
|
<h1>%(exception_type)s</h1>
|
|
<div class="detail">
|
|
<p class="errormsg">%(exception)s</p>
|
|
</div>
|
|
<h2 class="traceback">Traceback <em>(most recent call last)</em></h2>
|
|
%(summary)s
|
|
<div class="plain">
|
|
<form action="/?__debugger__=yes&cmd=paste" method="post">
|
|
<p>
|
|
<input type="hidden" name="language" value="pytb">
|
|
This is the Copy/Paste friendly version of the traceback. <span
|
|
class="pastemessage">You can also paste this traceback into
|
|
a <a href="https://gist.github.com/">gist</a>:
|
|
<input type="submit" value="create paste"></span>
|
|
</p>
|
|
<textarea cols="50" rows="10" name="code" readonly>%(plaintext)s</textarea>
|
|
</form>
|
|
</div>
|
|
<div class="explanation">
|
|
The debugger caught an exception in your WSGI application. You can now
|
|
look at the traceback which led to the error. <span class="nojavascript">
|
|
If you enable JavaScript you can also use additional features such as code
|
|
execution (if the evalex feature is enabled), automatic pasting of the
|
|
exceptions and much more.</span>
|
|
</div>
|
|
''' + FOOTER + '''
|
|
<!--
|
|
|
|
%(plaintext_cs)s
|
|
|
|
-->
|
|
'''
|
|
|
|
CONSOLE_HTML = HEADER + u'''\
|
|
<h1>Interactive Console</h1>
|
|
<div class="explanation">
|
|
In this console you can execute Python expressions in the context of the
|
|
application. The initial namespace was created by the debugger automatically.
|
|
</div>
|
|
<div class="console"><div class="inner">The Console requires JavaScript.</div></div>
|
|
''' + FOOTER
|
|
|
|
SUMMARY_HTML = u'''\
|
|
<div class="%(classes)s">
|
|
%(title)s
|
|
<ul>%(frames)s</ul>
|
|
%(description)s
|
|
</div>
|
|
'''
|
|
|
|
FRAME_HTML = u'''\
|
|
<div class="frame" id="frame-%(id)d">
|
|
<h4>File <cite class="filename">"%(filename)s"</cite>,
|
|
line <em class="line">%(lineno)s</em>,
|
|
in <code class="function">%(function_name)s</code></h4>
|
|
<pre>%(current_line)s</pre>
|
|
</div>
|
|
'''
|
|
|
|
SOURCE_TABLE_HTML = u'<table class=source>%s</table>'
|
|
|
|
SOURCE_LINE_HTML = u'''\
|
|
<tr class="%(classes)s">
|
|
<td class=lineno>%(lineno)s</td>
|
|
<td>%(code)s</td>
|
|
</tr>
|
|
'''
|
|
|
|
|
|
def render_console_html(secret):
|
|
return CONSOLE_HTML % {
|
|
'evalex': 'true',
|
|
'console': 'true',
|
|
'title': 'Console',
|
|
'secret': secret,
|
|
'traceback_id': -1
|
|
}
|
|
|
|
|
|
def get_current_traceback(ignore_system_exceptions=False,
|
|
show_hidden_frames=False, skip=0):
|
|
"""Get the current exception info as `Traceback` object. Per default
|
|
calling this method will reraise system exceptions such as generator exit,
|
|
system exit or others. This behavior can be disabled by passing `False`
|
|
to the function as first parameter.
|
|
"""
|
|
exc_type, exc_value, tb = sys.exc_info()
|
|
if ignore_system_exceptions and exc_type in system_exceptions:
|
|
raise
|
|
for x in range_type(skip):
|
|
if tb.tb_next is None:
|
|
break
|
|
tb = tb.tb_next
|
|
tb = Traceback(exc_type, exc_value, tb)
|
|
if not show_hidden_frames:
|
|
tb.filter_hidden_frames()
|
|
return tb
|
|
|
|
|
|
class Line(object):
|
|
"""Helper for the source renderer."""
|
|
__slots__ = ('lineno', 'code', 'in_frame', 'current')
|
|
|
|
def __init__(self, lineno, code):
|
|
self.lineno = lineno
|
|
self.code = code
|
|
self.in_frame = False
|
|
self.current = False
|
|
|
|
def classes(self):
|
|
rv = ['line']
|
|
if self.in_frame:
|
|
rv.append('in-frame')
|
|
if self.current:
|
|
rv.append('current')
|
|
return rv
|
|
classes = property(classes)
|
|
|
|
def render(self):
|
|
return SOURCE_LINE_HTML % {
|
|
'classes': u' '.join(self.classes),
|
|
'lineno': self.lineno,
|
|
'code': escape(self.code)
|
|
}
|
|
|
|
|
|
class Traceback(object):
|
|
"""Wraps a traceback."""
|
|
|
|
def __init__(self, exc_type, exc_value, tb):
|
|
self.exc_type = exc_type
|
|
self.exc_value = exc_value
|
|
if not isinstance(exc_type, str):
|
|
exception_type = exc_type.__name__
|
|
if exc_type.__module__ not in ('__builtin__', 'exceptions'):
|
|
exception_type = exc_type.__module__ + '.' + exception_type
|
|
else:
|
|
exception_type = exc_type
|
|
self.exception_type = exception_type
|
|
|
|
# we only add frames to the list that are not hidden. This follows
|
|
# the the magic variables as defined by paste.exceptions.collector
|
|
self.frames = []
|
|
while tb:
|
|
self.frames.append(Frame(exc_type, exc_value, tb))
|
|
tb = tb.tb_next
|
|
|
|
def filter_hidden_frames(self):
|
|
"""Remove the frames according to the paste spec."""
|
|
if not self.frames:
|
|
return
|
|
|
|
new_frames = []
|
|
hidden = False
|
|
for frame in self.frames:
|
|
hide = frame.hide
|
|
if hide in ('before', 'before_and_this'):
|
|
new_frames = []
|
|
hidden = False
|
|
if hide == 'before_and_this':
|
|
continue
|
|
elif hide in ('reset', 'reset_and_this'):
|
|
hidden = False
|
|
if hide == 'reset_and_this':
|
|
continue
|
|
elif hide in ('after', 'after_and_this'):
|
|
hidden = True
|
|
if hide == 'after_and_this':
|
|
continue
|
|
elif hide or hidden:
|
|
continue
|
|
new_frames.append(frame)
|
|
|
|
# if we only have one frame and that frame is from the codeop
|
|
# module, remove it.
|
|
if len(new_frames) == 1 and self.frames[0].module == 'codeop':
|
|
del self.frames[:]
|
|
|
|
# if the last frame is missing something went terrible wrong :(
|
|
elif self.frames[-1] in new_frames:
|
|
self.frames[:] = new_frames
|
|
|
|
def is_syntax_error(self):
|
|
"""Is it a syntax error?"""
|
|
return isinstance(self.exc_value, SyntaxError)
|
|
is_syntax_error = property(is_syntax_error)
|
|
|
|
def exception(self):
|
|
"""String representation of the exception."""
|
|
buf = traceback.format_exception_only(self.exc_type, self.exc_value)
|
|
rv = ''.join(buf).strip()
|
|
return rv.decode('utf-8', 'replace') if PY2 else rv
|
|
exception = property(exception)
|
|
|
|
def log(self, logfile=None):
|
|
"""Log the ASCII traceback into a file object."""
|
|
if logfile is None:
|
|
logfile = sys.stderr
|
|
tb = self.plaintext.rstrip() + u'\n'
|
|
if PY2:
|
|
tb = tb.encode('utf-8', 'replace')
|
|
logfile.write(tb)
|
|
|
|
def paste(self):
|
|
"""Create a paste and return the paste id."""
|
|
data = json.dumps({
|
|
'description': 'Werkzeug Internal Server Error',
|
|
'public': False,
|
|
'files': {
|
|
'traceback.txt': {
|
|
'content': self.plaintext
|
|
}
|
|
}
|
|
}).encode('utf-8')
|
|
try:
|
|
from urllib2 import urlopen
|
|
except ImportError:
|
|
from urllib.request import urlopen
|
|
rv = urlopen('https://api.github.com/gists', data=data)
|
|
resp = json.loads(rv.read().decode('utf-8'))
|
|
rv.close()
|
|
return {
|
|
'url': resp['html_url'],
|
|
'id': resp['id']
|
|
}
|
|
|
|
def render_summary(self, include_title=True):
|
|
"""Render the traceback for the interactive console."""
|
|
title = ''
|
|
frames = []
|
|
classes = ['traceback']
|
|
if not self.frames:
|
|
classes.append('noframe-traceback')
|
|
|
|
if include_title:
|
|
if self.is_syntax_error:
|
|
title = u'Syntax Error'
|
|
else:
|
|
title = u'Traceback <em>(most recent call last)</em>:'
|
|
|
|
for frame in self.frames:
|
|
frames.append(u'<li%s>%s' % (
|
|
frame.info and u' title="%s"' % escape(frame.info) or u'',
|
|
frame.render()
|
|
))
|
|
|
|
if self.is_syntax_error:
|
|
description_wrapper = u'<pre class=syntaxerror>%s</pre>'
|
|
else:
|
|
description_wrapper = u'<blockquote>%s</blockquote>'
|
|
|
|
return SUMMARY_HTML % {
|
|
'classes': u' '.join(classes),
|
|
'title': title and u'<h3>%s</h3>' % title or u'',
|
|
'frames': u'\n'.join(frames),
|
|
'description': description_wrapper % escape(self.exception)
|
|
}
|
|
|
|
def render_full(self, evalex=False, secret=None):
|
|
"""Render the Full HTML page with the traceback info."""
|
|
exc = escape(self.exception)
|
|
return PAGE_HTML % {
|
|
'evalex': evalex and 'true' or 'false',
|
|
'console': 'false',
|
|
'title': exc,
|
|
'exception': exc,
|
|
'exception_type': escape(self.exception_type),
|
|
'summary': self.render_summary(include_title=False),
|
|
'plaintext': self.plaintext,
|
|
'plaintext_cs': re.sub('-{2,}', '-', self.plaintext),
|
|
'traceback_id': self.id,
|
|
'secret': secret
|
|
}
|
|
|
|
def generate_plaintext_traceback(self):
|
|
"""Like the plaintext attribute but returns a generator"""
|
|
yield u'Traceback (most recent call last):'
|
|
for frame in self.frames:
|
|
yield u' File "%s", line %s, in %s' % (
|
|
frame.filename,
|
|
frame.lineno,
|
|
frame.function_name
|
|
)
|
|
yield u' ' + frame.current_line.strip()
|
|
yield self.exception
|
|
|
|
def plaintext(self):
|
|
return u'\n'.join(self.generate_plaintext_traceback())
|
|
plaintext = cached_property(plaintext)
|
|
|
|
id = property(lambda x: id(x))
|
|
|
|
|
|
class Frame(object):
|
|
"""A single frame in a traceback."""
|
|
|
|
def __init__(self, exc_type, exc_value, tb):
|
|
self.lineno = tb.tb_lineno
|
|
self.function_name = tb.tb_frame.f_code.co_name
|
|
self.locals = tb.tb_frame.f_locals
|
|
self.globals = tb.tb_frame.f_globals
|
|
|
|
fn = inspect.getsourcefile(tb) or inspect.getfile(tb)
|
|
if fn[-4:] in ('.pyo', '.pyc'):
|
|
fn = fn[:-1]
|
|
# if it's a file on the file system resolve the real filename.
|
|
if os.path.isfile(fn):
|
|
fn = os.path.realpath(fn)
|
|
self.filename = to_unicode(fn, sys.getfilesystemencoding())
|
|
self.module = self.globals.get('__name__')
|
|
self.loader = self.globals.get('__loader__')
|
|
self.code = tb.tb_frame.f_code
|
|
|
|
# support for paste's traceback extensions
|
|
self.hide = self.locals.get('__traceback_hide__', False)
|
|
info = self.locals.get('__traceback_info__')
|
|
if info is not None:
|
|
try:
|
|
info = text_type(info)
|
|
except UnicodeError:
|
|
info = str(info).decode('utf-8', 'replace')
|
|
self.info = info
|
|
|
|
def render(self):
|
|
"""Render a single frame in a traceback."""
|
|
return FRAME_HTML % {
|
|
'id': self.id,
|
|
'filename': escape(self.filename),
|
|
'lineno': self.lineno,
|
|
'function_name': escape(self.function_name),
|
|
'current_line': escape(self.current_line.strip())
|
|
}
|
|
|
|
def get_annotated_lines(self):
|
|
"""Helper function that returns lines with extra information."""
|
|
lines = [Line(idx + 1, x) for idx, x in enumerate(self.sourcelines)]
|
|
|
|
# find function definition and mark lines
|
|
if hasattr(self.code, 'co_firstlineno'):
|
|
lineno = self.code.co_firstlineno - 1
|
|
while lineno > 0:
|
|
if _funcdef_re.match(lines[lineno].code):
|
|
break
|
|
lineno -= 1
|
|
try:
|
|
offset = len(inspect.getblock([x.code + '\n' for x
|
|
in lines[lineno:]]))
|
|
except TokenError:
|
|
offset = 0
|
|
for line in lines[lineno:lineno + offset]:
|
|
line.in_frame = True
|
|
|
|
# mark current line
|
|
try:
|
|
lines[self.lineno - 1].current = True
|
|
except IndexError:
|
|
pass
|
|
|
|
return lines
|
|
|
|
def render_source(self):
|
|
"""Render the sourcecode."""
|
|
return SOURCE_TABLE_HTML % u'\n'.join(line.render() for line in
|
|
self.get_annotated_lines())
|
|
|
|
def eval(self, code, mode='single'):
|
|
"""Evaluate code in the context of the frame."""
|
|
if isinstance(code, string_types):
|
|
if PY2 and isinstance(code, unicode):
|
|
code = UTF8_COOKIE + code.encode('utf-8')
|
|
code = compile(code, '<interactive>', mode)
|
|
return eval(code, self.globals, self.locals)
|
|
|
|
@cached_property
|
|
def sourcelines(self):
|
|
"""The sourcecode of the file as list of unicode strings."""
|
|
# get sourcecode from loader or file
|
|
source = None
|
|
if self.loader is not None:
|
|
try:
|
|
if hasattr(self.loader, 'get_source'):
|
|
source = self.loader.get_source(self.module)
|
|
elif hasattr(self.loader, 'get_source_by_code'):
|
|
source = self.loader.get_source_by_code(self.code)
|
|
except Exception:
|
|
# we munch the exception so that we don't cause troubles
|
|
# if the loader is broken.
|
|
pass
|
|
|
|
if source is None:
|
|
try:
|
|
f = open(self.filename, mode='rb')
|
|
except IOError:
|
|
return []
|
|
try:
|
|
source = f.read()
|
|
finally:
|
|
f.close()
|
|
|
|
# already unicode? return right away
|
|
if isinstance(source, text_type):
|
|
return source.splitlines()
|
|
|
|
# yes. it should be ascii, but we don't want to reject too many
|
|
# characters in the debugger if something breaks
|
|
charset = 'utf-8'
|
|
if source.startswith(UTF8_COOKIE):
|
|
source = source[3:]
|
|
else:
|
|
for idx, match in enumerate(_line_re.finditer(source)):
|
|
match = _coding_re.search(match.group())
|
|
if match is not None:
|
|
charset = match.group(1)
|
|
break
|
|
if idx > 1:
|
|
break
|
|
|
|
# on broken cookies we fall back to utf-8 too
|
|
charset = to_native(charset)
|
|
try:
|
|
codecs.lookup(charset)
|
|
except LookupError:
|
|
charset = 'utf-8'
|
|
|
|
return source.decode(charset, 'replace').splitlines()
|
|
|
|
@property
|
|
def current_line(self):
|
|
try:
|
|
return self.sourcelines[self.lineno - 1]
|
|
except IndexError:
|
|
return u''
|
|
|
|
@cached_property
|
|
def console(self):
|
|
return Console(self.globals, self.locals)
|
|
|
|
id = property(lambda x: id(x))
|