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import json
import unittest
import urllib.request
from base64 import b64encode
from multiprocessing.dummy import Pool
from textwrap import dedent
from tests.gunicorn_utils import run_gunicorn
def b64encode_code(data: str):
data = dedent(data).strip()
return b64encode(data.encode()).decode("ascii")
def snekbox_run_code(code: str) -> tuple[str, int]:
body = {"args": ["-c", code]}
return snekbox_request(body)
def snekbox_request(content: dict) -> tuple[str, int]:
json_data = json.dumps(content).encode("utf-8")
req = urllib.request.Request("http://localhost:8060/eval")
req.add_header("Content-Type", "application/json; charset=utf-8")
req.add_header("Content-Length", str(len(json_data)))
with urllib.request.urlopen(req, json_data, timeout=30) as response:
response_data = response.read().decode("utf-8")
return response_data, response.status
class IntegrationTests(unittest.TestCase):
def test_memory_limit_separate_per_process(self):
"""
Each NsJail process should have its own memory limit.
The memory used by one process should not contribute to the memory cap of other processes.
See https://github.com/python-discord/snekbox/issues/83
"""
with run_gunicorn():
code = "import time; ' ' * 33000000; time.sleep(0.1)"
processes = 3
args = [code] * processes
with Pool(processes) as p:
results = p.map(snekbox_run_code, args)
responses, statuses = zip(*results)
self.assertTrue(all(status == 200 for status in statuses))
self.assertTrue(all(json.loads(response)["returncode"] == 0 for response in responses))
def test_multi_binary_support(self):
"""Test eval requests with different binary paths set."""
with run_gunicorn():
get_python_version_body = {
"input": "import sys; print('.'.join(map(str, sys.version_info[:2])))"
}
cases = [
(
get_python_version_body,
"3.12\n",
"test default binary is used when binary_path not specified",
),
(
get_python_version_body | {"binary_path": "/lang/python/3.12/bin/python"},
"3.12\n",
"test default binary is used when explicitly set",
),
(
get_python_version_body | {"binary_path": "/lang/python/3.13/bin/python"},
"3.13\n",
"test alternative binary is used when set",
),
]
for body, expected, msg in cases:
with self.subTest(msg=msg, body=body, expected=expected):
response, status = snekbox_request(body)
self.assertEqual(status, 200)
self.assertEqual(json.loads(response)["stdout"], expected)
def invalid_binary_paths(self):
"""Test that passing invalid binary paths result in no code execution."""
with run_gunicorn():
cases = [
("/bin/bash", "test files outside of /lang cannot be run"),
(
"/lang/../bin/bash",
"test path traversal still stops files outside /lang from running",
),
("/foo/bar", "test non-existant files are not run"),
]
for path, msg in cases:
with self.subTest(msg=msg, path=path):
body = {"args": ["-c", "echo", "hi"], "binary_path": path}
response, status = snekbox_request(body)
self.assertEqual(status, 400)
expected = {"title": "binary_path file is invalid"}
self.assertEqual(json.loads(response)["stdout"], expected)
def test_eval(self):
"""Test normal eval requests without files."""
with run_gunicorn():
cases = [
({"input": "print('Hello')"}, "Hello\n"),
({"args": ["-c", "print('abc12')"]}, "abc12\n"),
]
for body, expected in cases:
with self.subTest(body=body):
response, status = snekbox_request(body)
self.assertEqual(status, 200)
self.assertEqual(json.loads(response)["stdout"], expected)
def test_files_send_receive(self):
"""Test sending and receiving files to snekbox."""
with run_gunicorn():
request = {
"args": ["main.py"],
"files": [
{
"path": "main.py",
"content": b64encode_code(
"""
from pathlib import Path
from mod import lib
print(lib.var)
with open('test.txt', 'w') as f:
f.write('test 1')
Path('dir').mkdir()
Path('dir/test2.txt').write_text('test 2')
"""
),
},
{"path": "mod/__init__.py"},
{"path": "mod/lib.py", "content": b64encode_code("var = 'hello'")},
],
}
expected = {
"stdout": "hello\n",
"returncode": 0,
"files": [
{
"path": "dir/test2.txt",
"size": len("test 2"),
"content": b64encode_code("test 2"),
},
{
"path": "test.txt",
"size": len("test 1"),
"content": b64encode_code("test 1"),
},
],
}
response, status = snekbox_request(request)
self.assertEqual(200, status)
self.assertEqual(expected, json.loads(response))
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