shell bypass 403
# Copyright (c) 2016, Matt Layman
import re
import sys
from tap.directive import Directive
from tap.i18n import _
from tap.line import Bail, Diagnostic, Plan, Result, Unknown, Version
class Parser(object):
"""A parser for TAP files and lines."""
# ok and not ok share most of the same characteristics.
result_base = r"""
\s* # Optional whitespace.
(?P<number>\d*) # Optional test number.
\s* # Optional whitespace.
(?P<description>[^#]*) # Optional description before #.
\#? # Optional directive marker.
\s* # Optional whitespace.
(?P<directive>.*) # Optional directive text.
"""
ok = re.compile(r'^ok' + result_base, re.VERBOSE)
not_ok = re.compile(r'^not\ ok' + result_base, re.VERBOSE)
plan = re.compile(r"""
^1..(?P<expected>\d+) # Match the plan details.
[^#]* # Consume any non-hash character to confirm only
# directives appear with the plan details.
\#? # Optional directive marker.
\s* # Optional whitespace.
(?P<directive>.*) # Optional directive text.
""", re.VERBOSE)
diagnostic = re.compile(r'^#')
bail = re.compile(r"""
^Bail\ out!
\s* # Optional whitespace.
(?P<reason>.*) # Optional reason.
""", re.VERBOSE)
version = re.compile(r'^TAP version (?P<version>\d+)$')
TAP_MINIMUM_DECLARED_VERSION = 13
def parse_file(self, filename):
"""Parse a TAP file and determine what each line in the file is.
This is a generator method that will yield each parsed line. The
filename is assumed to exist.
"""
with open(filename, 'r') as tap_file:
for line in tap_file:
yield self.parse_line(line.rstrip())
def parse_stdin(self):
"""Parse a TAP stream from STDIN."""
for line in sys.stdin:
yield self.parse_line(line.rstrip())
def parse_line(self, text):
"""Parse a line into whatever TAP category it belongs."""
match = self.ok.match(text)
if match:
return self._parse_result(True, match)
match = self.not_ok.match(text)
if match:
return self._parse_result(False, match)
if self.diagnostic.match(text):
return Diagnostic(text)
match = self.plan.match(text)
if match:
return self._parse_plan(match)
match = self.bail.match(text)
if match:
return Bail(match.group('reason'))
match = self.version.match(text)
if match:
return self._parse_version(match)
return Unknown()
def _parse_plan(self, match):
"""Parse a matching plan line."""
expected_tests = int(match.group('expected'))
directive = Directive(match.group('directive'))
# Only SKIP directives are allowed in the plan.
if directive.text and not directive.skip:
return Unknown()
return Plan(expected_tests, directive)
def _parse_result(self, ok, match):
"""Parse a matching result line into a result instance."""
return Result(
ok, match.group('number'), match.group('description').strip(),
Directive(match.group('directive')))
def _parse_version(self, match):
version = int(match.group('version'))
if version < self.TAP_MINIMUM_DECLARED_VERSION:
raise ValueError(_('It is an error to explicitly specify '
'any version lower than 13.'))
return Version(version)