/usr/lib/python2.7/dist-packages/asterisk/agitb.py is in python-pyst 0.6.50-1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 | """More comprehensive traceback formatting for Python scripts.
To enable this module, do:
import asterisk.agitb, asterisk.agi
asterisk.agitb.enable(display = False, logdir = '/var/log/asterisk/')
agi = asterisk.agi.AGI()
asterisk.agitb.enable(agi, False, '/var/log/asterisk')
at the top of your script. The optional arguments to enable() are:
agi - the agi handle to write verbose messages to
display - if true, tracebacks are displayed on the asterisk console
(used with the agi option)
logdir - if set, tracebacks are written to files in this directory
context - number of lines of source code to show for each stack frame
By default, tracebacks are displayed but not saved, and the context is 5 lines.
You may want to add a logdir if you call agitb.enable() before you have
an agi.AGI() handle.
Alternatively, if you have caught an exception and want agitb to display it
for you, call agitb.handler(). The optional argument to handler() is a
3-item tuple (etype, evalue, etb) just like the value of sys.exc_info().
If you do not pass anything to handler() it will use sys.exc_info().
This script was adapted from Ka-Ping Yee's cgitb.
"""
__author__ = 'Matthew Nicholson'
__version__ = '0.1.0'
import sys
__UNDEF__ = [] # a special sentinel object
def lookup(name, frame, locals):
"""Find the value for a given name in the given environment."""
if name in locals:
return 'local', locals[name]
if name in frame.f_globals:
return 'global', frame.f_globals[name]
if '__builtins__' in frame.f_globals:
builtins = frame.f_globals['__builtins__']
if type(builtins) is type({}):
if name in builtins:
return 'builtin', builtins[name]
else:
if hasattr(builtins, name):
return 'builtin', getattr(builtins, name)
return None, __UNDEF__
def scanvars(reader, frame, locals):
"""Scan one logical line of Python and look up values of variables used."""
import tokenize, keyword
vars, lasttoken, parent, prefix, value = [], None, None, '', __UNDEF__
for ttype, token, start, end, line in tokenize.generate_tokens(reader):
if ttype == tokenize.NEWLINE: break
if ttype == tokenize.NAME and token not in keyword.kwlist:
if lasttoken == '.':
if parent is not __UNDEF__:
value = getattr(parent, token, __UNDEF__)
vars.append((prefix + token, prefix, value))
else:
where, value = lookup(token, frame, locals)
vars.append((token, where, value))
elif token == '.':
prefix += lasttoken + '.'
parent = value
else:
parent, prefix = None, ''
lasttoken = token
return vars
def text((etype, evalue, etb), context=5):
"""Return a plain text document describing a given traceback."""
import os, types, time, traceback, linecache, inspect, pydoc
if type(etype) is types.ClassType:
etype = etype.__name__
pyver = 'Python ' + sys.version.split()[0] + ': ' + sys.executable
date = time.ctime(time.time())
head = "%s\n%s\n%s\n" % (str(etype), pyver, date) + '''
A problem occurred in a Python script. Here is the sequence of
function calls leading up to the error, in the order they occurred.
'''
frames = []
records = inspect.getinnerframes(etb, context)
for frame, file, lnum, func, lines, index in records:
file = file and os.path.abspath(file) or '?'
args, varargs, varkw, locals = inspect.getargvalues(frame)
call = ''
if func != '?':
call = 'in ' + func + \
inspect.formatargvalues(args, varargs, varkw, locals,
formatvalue=lambda value: '=' + pydoc.text.repr(value))
highlight = {}
def reader(lnum=[lnum]):
highlight[lnum[0]] = 1
try: return linecache.getline(file, lnum[0])
finally: lnum[0] += 1
vars = scanvars(reader, frame, locals)
rows = [' %s %s' % (file, call)]
if index is not None:
i = lnum - index
for line in lines:
num = '%5d ' % i
rows.append(num+line.rstrip())
i += 1
done, dump = {}, []
for name, where, value in vars:
if name in done: continue
done[name] = 1
if value is not __UNDEF__:
if where == 'global': name = 'global ' + name
elif where == 'local': name = name
else: name = where + name.split('.')[-1]
dump.append('%s = %s' % (name, pydoc.text.repr(value)))
else:
dump.append(name + ' undefined')
rows.append('\n'.join(dump))
frames.append('\n%s\n' % '\n'.join(rows))
exception = ['%s: %s' % (str(etype), str(evalue))]
if type(evalue) is types.InstanceType:
for name in dir(evalue):
value = pydoc.text.repr(getattr(evalue, name))
exception.append('\n%s%s = %s' % (" "*4, name, value))
import traceback
return head + ''.join(frames) + ''.join(exception) + '''
The above is a description of an error in a Python program. Here is
the original traceback:
%s
''' % ''.join(traceback.format_exception(etype, evalue, etb))
class Hook:
"""A hook to replace sys.excepthook that shows tracebacks in HTML."""
def __init__(self, display=1, logdir=None, context=5, file=None,
agi=None):
self.display = display # send tracebacks to browser if true
self.logdir = logdir # log tracebacks to files if not None
self.context = context # number of source code lines per frame
self.file = file or sys.stderr # place to send the output
self.agi = agi
def __call__(self, etype, evalue, etb):
self.handle((etype, evalue, etb))
def handle(self, info=None):
info = info or sys.exc_info()
try:
doc = text(info, self.context)
except: # just in case something goes wrong
import traceback
doc = ''.join(traceback.format_exception(*info))
if self.display:
if self.agi: # print to agi
for line in doc.split('\n'):
self.agi.verbose(line, 4)
else:
self.file.write(doc + '\n')
if self.agi:
self.agi.verbose('A problem occured in a python script', 4)
else:
self.file.write('A problem occured in a python script\n')
if self.logdir is not None:
import os, tempfile
(fd, path) = tempfile.mkstemp(suffix='.txt', dir=self.logdir)
try:
file = os.fdopen(fd, 'w')
file.write(doc)
file.close()
msg = '%s contains the description of this error.' % path
except:
msg = 'Tried to save traceback to %s, but failed.' % path
if self.agi:
self.agi.verbose(msg, 4)
else:
self.file.write(msg + '\n')
try:
self.file.flush()
except: pass
handler = Hook().handle
def enable(agi=None, display=1, logdir=None, context=5):
"""Install an exception handler that formats tracebacks as HTML.
The optional argument 'display' can be set to 0 to suppress sending the
traceback to the browser, and 'logdir' can be set to a directory to cause
tracebacks to be written to files there."""
except_hook = Hook(display=display, logdir=logdir,
context=context, agi=agi)
sys.excepthook = except_hook
global handler
handler = except_hook.handle
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