shell bypass 403
import os
import sys
import shutil
import pathlib
import tempfile
import textwrap
import contextlib
@contextlib.contextmanager
def tempdir():
tmpdir = tempfile.mkdtemp()
try:
yield pathlib.Path(tmpdir)
finally:
shutil.rmtree(tmpdir)
@contextlib.contextmanager
def save_cwd():
orig = os.getcwd()
try:
yield
finally:
os.chdir(orig)
@contextlib.contextmanager
def tempdir_as_cwd():
with tempdir() as tmp:
with save_cwd():
os.chdir(str(tmp))
yield tmp
@contextlib.contextmanager
def install_finder(finder):
sys.meta_path.append(finder)
try:
yield
finally:
sys.meta_path.remove(finder)
class Fixtures:
def setUp(self):
self.fixtures = contextlib.ExitStack()
self.addCleanup(self.fixtures.close)
class SiteDir(Fixtures):
def setUp(self):
super(SiteDir, self).setUp()
self.site_dir = self.fixtures.enter_context(tempdir())
class OnSysPath(Fixtures):
@staticmethod
@contextlib.contextmanager
def add_sys_path(dir):
sys.path[:0] = [str(dir)]
try:
yield
finally:
sys.path.remove(str(dir))
def setUp(self):
super(OnSysPath, self).setUp()
self.fixtures.enter_context(self.add_sys_path(self.site_dir))
class DistInfoPkg(OnSysPath, SiteDir):
files = {
"distinfo_pkg-1.0.0.dist-info": {
"METADATA": """
Name: distinfo-pkg
Author: Steven Ma
Version: 1.0.0
Requires-Dist: wheel >= 1.0
Requires-Dist: pytest; extra == 'test'
""",
"RECORD": "mod.py,sha256=abc,20\n",
"entry_points.txt": """
[entries]
main = mod:main
ns:sub = mod:main
"""
},
"mod.py": """
def main():
print("hello world")
""",
}
def setUp(self):
super(DistInfoPkg, self).setUp()
build_files(DistInfoPkg.files, self.site_dir)
class DistInfoPkgOffPath(SiteDir):
def setUp(self):
super(DistInfoPkgOffPath, self).setUp()
build_files(DistInfoPkg.files, self.site_dir)
class EggInfoPkg(OnSysPath, SiteDir):
files = {
"egginfo_pkg.egg-info": {
"PKG-INFO": """
Name: egginfo-pkg
Author: Steven Ma
License: Unknown
Version: 1.0.0
Classifier: Intended Audience :: Developers
Classifier: Topic :: Software Development :: Libraries
""",
"SOURCES.txt": """
mod.py
egginfo_pkg.egg-info/top_level.txt
""",
"entry_points.txt": """
[entries]
main = mod:main
""",
"requires.txt": """
wheel >= 1.0; python_version >= "2.7"
[test]
pytest
""",
"top_level.txt": "mod\n"
},
"mod.py": """
def main():
print("hello world")
""",
}
def setUp(self):
super(EggInfoPkg, self).setUp()
build_files(EggInfoPkg.files, prefix=self.site_dir)
class EggInfoFile(OnSysPath, SiteDir):
files = {
"egginfo_file.egg-info": """
Metadata-Version: 1.0
Name: egginfo_file
Version: 0.1
Summary: An example package
Home-page: www.example.com
Author: Eric Haffa-Vee
Author-email: eric@example.coms
License: UNKNOWN
Description: UNKNOWN
Platform: UNKNOWN
""",
}
def setUp(self):
super(EggInfoFile, self).setUp()
build_files(EggInfoFile.files, prefix=self.site_dir)
def build_files(file_defs, prefix=pathlib.Path()):
"""Build a set of files/directories, as described by the
file_defs dictionary. Each key/value pair in the dictionary is
interpreted as a filename/contents pair. If the contents value is a
dictionary, a directory is created, and the dictionary interpreted
as the files within it, recursively.
For example:
{"README.txt": "A README file",
"foo": {
"__init__.py": "",
"bar": {
"__init__.py": "",
},
"baz.py": "# Some code",
}
}
"""
for name, contents in file_defs.items():
full_name = prefix / name
if isinstance(contents, dict):
full_name.mkdir()
build_files(contents, prefix=full_name)
else:
if isinstance(contents, bytes):
with full_name.open('wb') as f:
f.write(contents)
else:
with full_name.open('w') as f:
f.write(DALS(contents))
def DALS(str):
"Dedent and left-strip"
return textwrap.dedent(str).lstrip()
class NullFinder:
def find_module(self, name):
pass