mirror of
https://github.com/django/django.git
synced 2024-12-22 17:16:24 +00:00
fe4a0bbe20
Thanks to Josh Schneier for the report, and to Carlton Gibson and Sarah Boyce for the reviews.
972 lines
35 KiB
Python
972 lines
35 KiB
Python
import base64
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import hashlib
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import os
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import shutil
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import sys
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import tempfile as sys_tempfile
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import unittest
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from io import BytesIO, StringIO
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from unittest import mock
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from urllib.parse import quote
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from django.conf import DEFAULT_STORAGE_ALIAS
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from django.core.exceptions import SuspiciousFileOperation
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from django.core.files import temp as tempfile
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from django.core.files.storage import default_storage
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from django.core.files.uploadedfile import SimpleUploadedFile, UploadedFile
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from django.http.multipartparser import (
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FILE,
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MAX_TOTAL_HEADER_SIZE,
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MultiPartParser,
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MultiPartParserError,
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Parser,
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)
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from django.test import SimpleTestCase, TestCase, client, override_settings
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from . import uploadhandler
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from .models import FileModel
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UNICODE_FILENAME = "test-0123456789_中文_Orléans.jpg"
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MEDIA_ROOT = sys_tempfile.mkdtemp()
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UPLOAD_FOLDER = "test_upload"
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UPLOAD_TO = os.path.join(MEDIA_ROOT, UPLOAD_FOLDER)
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CANDIDATE_TRAVERSAL_FILE_NAMES = [
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"/tmp/hax0rd.txt", # Absolute path, *nix-style.
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"C:\\Windows\\hax0rd.txt", # Absolute path, win-style.
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"C:/Windows/hax0rd.txt", # Absolute path, broken-style.
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"\\tmp\\hax0rd.txt", # Absolute path, broken in a different way.
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"/tmp\\hax0rd.txt", # Absolute path, broken by mixing.
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"subdir/hax0rd.txt", # Descendant path, *nix-style.
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"subdir\\hax0rd.txt", # Descendant path, win-style.
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"sub/dir\\hax0rd.txt", # Descendant path, mixed.
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"../../hax0rd.txt", # Relative path, *nix-style.
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"..\\..\\hax0rd.txt", # Relative path, win-style.
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"../..\\hax0rd.txt", # Relative path, mixed.
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"../hax0rd.txt", # HTML entities.
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"../hax0rd.txt", # HTML entities.
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]
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CANDIDATE_INVALID_FILE_NAMES = [
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"/tmp/", # Directory, *nix-style.
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"c:\\tmp\\", # Directory, win-style.
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"/tmp/.", # Directory dot, *nix-style.
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"c:\\tmp\\.", # Directory dot, *nix-style.
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"/tmp/..", # Parent directory, *nix-style.
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"c:\\tmp\\..", # Parent directory, win-style.
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"", # Empty filename.
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]
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@override_settings(
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MEDIA_ROOT=MEDIA_ROOT, ROOT_URLCONF="file_uploads.urls", MIDDLEWARE=[]
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)
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class FileUploadTests(TestCase):
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@classmethod
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def setUpClass(cls):
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super().setUpClass()
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os.makedirs(MEDIA_ROOT, exist_ok=True)
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cls.addClassCleanup(shutil.rmtree, MEDIA_ROOT)
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def test_upload_name_is_validated(self):
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candidates = [
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"/tmp/",
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"/tmp/..",
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"/tmp/.",
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]
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if sys.platform == "win32":
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candidates.extend(
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[
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"c:\\tmp\\",
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"c:\\tmp\\..",
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"c:\\tmp\\.",
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]
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)
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for file_name in candidates:
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with self.subTest(file_name=file_name):
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self.assertRaises(SuspiciousFileOperation, UploadedFile, name=file_name)
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def test_simple_upload(self):
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with open(__file__, "rb") as fp:
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post_data = {
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"name": "Ringo",
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"file_field": fp,
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}
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response = self.client.post("/upload/", post_data)
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self.assertEqual(response.status_code, 200)
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def test_large_upload(self):
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file = tempfile.NamedTemporaryFile
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with file(suffix=".file1") as file1, file(suffix=".file2") as file2:
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file1.write(b"a" * (2**21))
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file1.seek(0)
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file2.write(b"a" * (10 * 2**20))
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file2.seek(0)
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post_data = {
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"name": "Ringo",
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"file_field1": file1,
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"file_field2": file2,
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}
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for key in list(post_data):
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try:
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post_data[key + "_hash"] = hashlib.sha1(
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post_data[key].read()
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).hexdigest()
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post_data[key].seek(0)
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except AttributeError:
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post_data[key + "_hash"] = hashlib.sha1(
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post_data[key].encode()
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).hexdigest()
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response = self.client.post("/verify/", post_data)
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self.assertEqual(response.status_code, 200)
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def _test_base64_upload(self, content, encode=base64.b64encode):
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payload = client.FakePayload(
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"\r\n".join(
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[
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"--" + client.BOUNDARY,
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'Content-Disposition: form-data; name="file"; filename="test.txt"',
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"Content-Type: application/octet-stream",
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"Content-Transfer-Encoding: base64",
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"",
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]
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)
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)
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payload.write(b"\r\n" + encode(content.encode()) + b"\r\n")
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payload.write("--" + client.BOUNDARY + "--\r\n")
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r = {
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"CONTENT_LENGTH": len(payload),
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"CONTENT_TYPE": client.MULTIPART_CONTENT,
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"PATH_INFO": "/echo_content/",
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"REQUEST_METHOD": "POST",
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"wsgi.input": payload,
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}
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response = self.client.request(**r)
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self.assertEqual(response.json()["file"], content)
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def test_base64_upload(self):
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self._test_base64_upload("This data will be transmitted base64-encoded.")
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def test_big_base64_upload(self):
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self._test_base64_upload("Big data" * 68000) # > 512Kb
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def test_big_base64_newlines_upload(self):
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self._test_base64_upload("Big data" * 68000, encode=base64.encodebytes)
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def test_base64_invalid_upload(self):
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payload = client.FakePayload(
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"\r\n".join(
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[
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"--" + client.BOUNDARY,
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'Content-Disposition: form-data; name="file"; filename="test.txt"',
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"Content-Type: application/octet-stream",
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"Content-Transfer-Encoding: base64",
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"",
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]
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)
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)
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payload.write(b"\r\n!\r\n")
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payload.write("--" + client.BOUNDARY + "--\r\n")
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r = {
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"CONTENT_LENGTH": len(payload),
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"CONTENT_TYPE": client.MULTIPART_CONTENT,
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"PATH_INFO": "/echo_content/",
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"REQUEST_METHOD": "POST",
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"wsgi.input": payload,
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}
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response = self.client.request(**r)
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self.assertEqual(response.json()["file"], "")
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def test_unicode_file_name(self):
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with sys_tempfile.TemporaryDirectory() as temp_dir:
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# This file contains Chinese symbols and an accented char in the name.
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with open(os.path.join(temp_dir, UNICODE_FILENAME), "w+b") as file1:
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file1.write(b"b" * (2**10))
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file1.seek(0)
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response = self.client.post("/unicode_name/", {"file_unicode": file1})
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self.assertEqual(response.status_code, 200)
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def test_unicode_file_name_rfc2231(self):
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"""
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Receiving file upload when filename is encoded with RFC 2231.
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"""
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payload = client.FakePayload()
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payload.write(
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"\r\n".join(
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[
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"--" + client.BOUNDARY,
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'Content-Disposition: form-data; name="file_unicode"; '
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"filename*=UTF-8''%s" % quote(UNICODE_FILENAME),
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"Content-Type: application/octet-stream",
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"",
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"You got pwnd.\r\n",
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"\r\n--" + client.BOUNDARY + "--\r\n",
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]
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)
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)
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r = {
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"CONTENT_LENGTH": len(payload),
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"CONTENT_TYPE": client.MULTIPART_CONTENT,
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"PATH_INFO": "/unicode_name/",
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"REQUEST_METHOD": "POST",
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"wsgi.input": payload,
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}
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response = self.client.request(**r)
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self.assertEqual(response.status_code, 200)
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def test_unicode_name_rfc2231(self):
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"""
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Receiving file upload when filename is encoded with RFC 2231.
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"""
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payload = client.FakePayload()
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payload.write(
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"\r\n".join(
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[
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"--" + client.BOUNDARY,
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"Content-Disposition: form-data; name*=UTF-8''file_unicode; "
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"filename*=UTF-8''%s" % quote(UNICODE_FILENAME),
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"Content-Type: application/octet-stream",
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"",
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"You got pwnd.\r\n",
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"\r\n--" + client.BOUNDARY + "--\r\n",
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]
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)
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)
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r = {
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"CONTENT_LENGTH": len(payload),
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"CONTENT_TYPE": client.MULTIPART_CONTENT,
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"PATH_INFO": "/unicode_name/",
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"REQUEST_METHOD": "POST",
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"wsgi.input": payload,
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}
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response = self.client.request(**r)
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self.assertEqual(response.status_code, 200)
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def test_unicode_file_name_rfc2231_with_double_quotes(self):
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payload = client.FakePayload()
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payload.write(
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"\r\n".join(
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[
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"--" + client.BOUNDARY,
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'Content-Disposition: form-data; name="file_unicode"; '
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"filename*=\"UTF-8''%s\"" % quote(UNICODE_FILENAME),
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"Content-Type: application/octet-stream",
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"",
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"You got pwnd.\r\n",
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"\r\n--" + client.BOUNDARY + "--\r\n",
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]
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)
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)
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r = {
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"CONTENT_LENGTH": len(payload),
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"CONTENT_TYPE": client.MULTIPART_CONTENT,
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"PATH_INFO": "/unicode_name/",
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"REQUEST_METHOD": "POST",
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"wsgi.input": payload,
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}
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response = self.client.request(**r)
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self.assertEqual(response.status_code, 200)
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def test_unicode_name_rfc2231_with_double_quotes(self):
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payload = client.FakePayload()
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payload.write(
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"\r\n".join(
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[
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"--" + client.BOUNDARY,
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"Content-Disposition: form-data; name*=\"UTF-8''file_unicode\"; "
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"filename*=\"UTF-8''%s\"" % quote(UNICODE_FILENAME),
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"Content-Type: application/octet-stream",
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"",
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"You got pwnd.\r\n",
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"\r\n--" + client.BOUNDARY + "--\r\n",
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]
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)
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)
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r = {
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"CONTENT_LENGTH": len(payload),
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"CONTENT_TYPE": client.MULTIPART_CONTENT,
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"PATH_INFO": "/unicode_name/",
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"REQUEST_METHOD": "POST",
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"wsgi.input": payload,
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}
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response = self.client.request(**r)
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self.assertEqual(response.status_code, 200)
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def test_blank_filenames(self):
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"""
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Receiving file upload when filename is blank (before and after
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sanitization) should be okay.
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"""
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filenames = [
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"",
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# Normalized by MultiPartParser.IE_sanitize().
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"C:\\Windows\\",
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# Normalized by os.path.basename().
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"/",
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"ends-with-slash/",
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]
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payload = client.FakePayload()
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for i, name in enumerate(filenames):
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payload.write(
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"\r\n".join(
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[
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"--" + client.BOUNDARY,
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'Content-Disposition: form-data; name="file%s"; filename="%s"'
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% (i, name),
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"Content-Type: application/octet-stream",
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"",
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"You got pwnd.\r\n",
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]
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)
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)
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payload.write("\r\n--" + client.BOUNDARY + "--\r\n")
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r = {
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"CONTENT_LENGTH": len(payload),
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"CONTENT_TYPE": client.MULTIPART_CONTENT,
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"PATH_INFO": "/echo/",
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"REQUEST_METHOD": "POST",
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"wsgi.input": payload,
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}
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response = self.client.request(**r)
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self.assertEqual(response.status_code, 200)
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# Empty filenames should be ignored
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received = response.json()
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for i, name in enumerate(filenames):
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self.assertIsNone(received.get("file%s" % i))
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def test_non_printable_chars_in_file_names(self):
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file_name = "non-\x00printable\x00\n_chars.txt\x00"
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payload = client.FakePayload()
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payload.write(
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"\r\n".join(
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[
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"--" + client.BOUNDARY,
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f'Content-Disposition: form-data; name="file"; '
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f'filename="{file_name}"',
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"Content-Type: application/octet-stream",
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"",
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"You got pwnd.\r\n",
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]
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)
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)
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payload.write("\r\n--" + client.BOUNDARY + "--\r\n")
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r = {
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"CONTENT_LENGTH": len(payload),
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"CONTENT_TYPE": client.MULTIPART_CONTENT,
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"PATH_INFO": "/echo/",
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"REQUEST_METHOD": "POST",
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"wsgi.input": payload,
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}
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response = self.client.request(**r)
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# Non-printable chars are sanitized.
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received = response.json()
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self.assertEqual(received["file"], "non-printable_chars.txt")
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|
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def test_dangerous_file_names(self):
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"""Uploaded file names should be sanitized before ever reaching the view."""
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# This test simulates possible directory traversal attacks by a
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# malicious uploader We have to do some monkeybusiness here to construct
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# a malicious payload with an invalid file name (containing os.sep or
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# os.pardir). This similar to what an attacker would need to do when
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# trying such an attack.
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payload = client.FakePayload()
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for i, name in enumerate(CANDIDATE_TRAVERSAL_FILE_NAMES):
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payload.write(
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"\r\n".join(
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[
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"--" + client.BOUNDARY,
|
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'Content-Disposition: form-data; name="file%s"; filename="%s"'
|
|
% (i, name),
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"Content-Type: application/octet-stream",
|
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"",
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"You got pwnd.\r\n",
|
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]
|
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)
|
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)
|
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payload.write("\r\n--" + client.BOUNDARY + "--\r\n")
|
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|
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r = {
|
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"CONTENT_LENGTH": len(payload),
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"CONTENT_TYPE": client.MULTIPART_CONTENT,
|
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"PATH_INFO": "/echo/",
|
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"REQUEST_METHOD": "POST",
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"wsgi.input": payload,
|
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}
|
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response = self.client.request(**r)
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# The filenames should have been sanitized by the time it got to the view.
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received = response.json()
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for i, name in enumerate(CANDIDATE_TRAVERSAL_FILE_NAMES):
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got = received["file%s" % i]
|
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self.assertEqual(got, "hax0rd.txt")
|
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|
|
def test_filename_overflow(self):
|
|
"""File names over 256 characters (dangerous on some platforms) get fixed up."""
|
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long_str = "f" * 300
|
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cases = [
|
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# field name, filename, expected
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("long_filename", "%s.txt" % long_str, "%s.txt" % long_str[:251]),
|
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("long_extension", "foo.%s" % long_str, ".%s" % long_str[:254]),
|
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("no_extension", long_str, long_str[:255]),
|
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("no_filename", ".%s" % long_str, ".%s" % long_str[:254]),
|
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("long_everything", "%s.%s" % (long_str, long_str), ".%s" % long_str[:254]),
|
|
]
|
|
payload = client.FakePayload()
|
|
for name, filename, _ in cases:
|
|
payload.write(
|
|
"\r\n".join(
|
|
[
|
|
"--" + client.BOUNDARY,
|
|
'Content-Disposition: form-data; name="{}"; filename="{}"',
|
|
"Content-Type: application/octet-stream",
|
|
"",
|
|
"Oops.",
|
|
"",
|
|
]
|
|
).format(name, filename)
|
|
)
|
|
payload.write("\r\n--" + client.BOUNDARY + "--\r\n")
|
|
r = {
|
|
"CONTENT_LENGTH": len(payload),
|
|
"CONTENT_TYPE": client.MULTIPART_CONTENT,
|
|
"PATH_INFO": "/echo/",
|
|
"REQUEST_METHOD": "POST",
|
|
"wsgi.input": payload,
|
|
}
|
|
response = self.client.request(**r)
|
|
result = response.json()
|
|
for name, _, expected in cases:
|
|
got = result[name]
|
|
self.assertEqual(expected, got, "Mismatch for {}".format(name))
|
|
self.assertLess(
|
|
len(got), 256, "Got a long file name (%s characters)." % len(got)
|
|
)
|
|
|
|
def test_file_content(self):
|
|
file = tempfile.NamedTemporaryFile
|
|
with (
|
|
file(suffix=".ctype_extra") as no_content_type,
|
|
file(suffix=".ctype_extra") as simple_file,
|
|
):
|
|
no_content_type.write(b"no content")
|
|
no_content_type.seek(0)
|
|
|
|
simple_file.write(b"text content")
|
|
simple_file.seek(0)
|
|
simple_file.content_type = "text/plain"
|
|
|
|
string_io = StringIO("string content")
|
|
bytes_io = BytesIO(b"binary content")
|
|
|
|
response = self.client.post(
|
|
"/echo_content/",
|
|
{
|
|
"no_content_type": no_content_type,
|
|
"simple_file": simple_file,
|
|
"string": string_io,
|
|
"binary": bytes_io,
|
|
},
|
|
)
|
|
received = response.json()
|
|
self.assertEqual(received["no_content_type"], "no content")
|
|
self.assertEqual(received["simple_file"], "text content")
|
|
self.assertEqual(received["string"], "string content")
|
|
self.assertEqual(received["binary"], "binary content")
|
|
|
|
def test_content_type_extra(self):
|
|
"""Uploaded files may have content type parameters available."""
|
|
file = tempfile.NamedTemporaryFile
|
|
with (
|
|
file(suffix=".ctype_extra") as no_content_type,
|
|
file(suffix=".ctype_extra") as simple_file,
|
|
):
|
|
no_content_type.write(b"something")
|
|
no_content_type.seek(0)
|
|
|
|
simple_file.write(b"something")
|
|
simple_file.seek(0)
|
|
simple_file.content_type = "text/plain; test-key=test_value"
|
|
|
|
response = self.client.post(
|
|
"/echo_content_type_extra/",
|
|
{
|
|
"no_content_type": no_content_type,
|
|
"simple_file": simple_file,
|
|
},
|
|
)
|
|
received = response.json()
|
|
self.assertEqual(received["no_content_type"], {})
|
|
self.assertEqual(received["simple_file"], {"test-key": "test_value"})
|
|
|
|
def test_truncated_multipart_handled_gracefully(self):
|
|
"""
|
|
If passed an incomplete multipart message, MultiPartParser does not
|
|
attempt to read beyond the end of the stream, and simply will handle
|
|
the part that can be parsed gracefully.
|
|
"""
|
|
payload_str = "\r\n".join(
|
|
[
|
|
"--" + client.BOUNDARY,
|
|
'Content-Disposition: form-data; name="file"; filename="foo.txt"',
|
|
"Content-Type: application/octet-stream",
|
|
"",
|
|
"file contents" "--" + client.BOUNDARY + "--",
|
|
"",
|
|
]
|
|
)
|
|
payload = client.FakePayload(payload_str[:-10])
|
|
r = {
|
|
"CONTENT_LENGTH": len(payload),
|
|
"CONTENT_TYPE": client.MULTIPART_CONTENT,
|
|
"PATH_INFO": "/echo/",
|
|
"REQUEST_METHOD": "POST",
|
|
"wsgi.input": payload,
|
|
}
|
|
self.assertEqual(self.client.request(**r).json(), {})
|
|
|
|
def test_empty_multipart_handled_gracefully(self):
|
|
"""
|
|
If passed an empty multipart message, MultiPartParser will return
|
|
an empty QueryDict.
|
|
"""
|
|
r = {
|
|
"CONTENT_LENGTH": 0,
|
|
"CONTENT_TYPE": client.MULTIPART_CONTENT,
|
|
"PATH_INFO": "/echo/",
|
|
"REQUEST_METHOD": "POST",
|
|
"wsgi.input": client.FakePayload(b""),
|
|
}
|
|
self.assertEqual(self.client.request(**r).json(), {})
|
|
|
|
def test_custom_upload_handler(self):
|
|
file = tempfile.NamedTemporaryFile
|
|
with file() as smallfile, file() as bigfile:
|
|
# A small file (under the 5M quota)
|
|
smallfile.write(b"a" * (2**21))
|
|
smallfile.seek(0)
|
|
|
|
# A big file (over the quota)
|
|
bigfile.write(b"a" * (10 * 2**20))
|
|
bigfile.seek(0)
|
|
|
|
# Small file posting should work.
|
|
self.assertIn("f", self.client.post("/quota/", {"f": smallfile}).json())
|
|
|
|
# Large files don't go through.
|
|
self.assertNotIn("f", self.client.post("/quota/", {"f": bigfile}).json())
|
|
|
|
def test_broken_custom_upload_handler(self):
|
|
with tempfile.NamedTemporaryFile() as file:
|
|
file.write(b"a" * (2**21))
|
|
file.seek(0)
|
|
|
|
msg = (
|
|
"You cannot alter upload handlers after the upload has been processed."
|
|
)
|
|
with self.assertRaisesMessage(AttributeError, msg):
|
|
self.client.post("/quota/broken/", {"f": file})
|
|
|
|
def test_stop_upload_temporary_file_handler(self):
|
|
with tempfile.NamedTemporaryFile() as temp_file:
|
|
temp_file.write(b"a")
|
|
temp_file.seek(0)
|
|
response = self.client.post("/temp_file/stop_upload/", {"file": temp_file})
|
|
temp_path = response.json()["temp_path"]
|
|
self.assertIs(os.path.exists(temp_path), False)
|
|
|
|
def test_upload_interrupted_temporary_file_handler(self):
|
|
# Simulate an interrupted upload by omitting the closing boundary.
|
|
class MockedParser(Parser):
|
|
def __iter__(self):
|
|
for item in super().__iter__():
|
|
item_type, meta_data, field_stream = item
|
|
yield item_type, meta_data, field_stream
|
|
if item_type == FILE:
|
|
return
|
|
|
|
with tempfile.NamedTemporaryFile() as temp_file:
|
|
temp_file.write(b"a")
|
|
temp_file.seek(0)
|
|
with mock.patch(
|
|
"django.http.multipartparser.Parser",
|
|
MockedParser,
|
|
):
|
|
response = self.client.post(
|
|
"/temp_file/upload_interrupted/",
|
|
{"file": temp_file},
|
|
)
|
|
temp_path = response.json()["temp_path"]
|
|
self.assertIs(os.path.exists(temp_path), False)
|
|
|
|
def test_upload_large_header_fields(self):
|
|
payload = client.FakePayload(
|
|
"\r\n".join(
|
|
[
|
|
"--" + client.BOUNDARY,
|
|
'Content-Disposition: form-data; name="my_file"; '
|
|
'filename="test.txt"',
|
|
"Content-Type: text/plain",
|
|
"X-Long-Header: %s" % ("-" * 500),
|
|
"",
|
|
"file contents",
|
|
"--" + client.BOUNDARY + "--\r\n",
|
|
]
|
|
),
|
|
)
|
|
r = {
|
|
"CONTENT_LENGTH": len(payload),
|
|
"CONTENT_TYPE": client.MULTIPART_CONTENT,
|
|
"PATH_INFO": "/echo_content/",
|
|
"REQUEST_METHOD": "POST",
|
|
"wsgi.input": payload,
|
|
}
|
|
response = self.client.request(**r)
|
|
self.assertEqual(response.status_code, 200)
|
|
self.assertEqual(response.json(), {"my_file": "file contents"})
|
|
|
|
def test_upload_header_fields_too_large(self):
|
|
payload = client.FakePayload(
|
|
"\r\n".join(
|
|
[
|
|
"--" + client.BOUNDARY,
|
|
'Content-Disposition: form-data; name="my_file"; '
|
|
'filename="test.txt"',
|
|
"Content-Type: text/plain",
|
|
"X-Long-Header: %s" % ("-" * (MAX_TOTAL_HEADER_SIZE + 1)),
|
|
"",
|
|
"file contents",
|
|
"--" + client.BOUNDARY + "--\r\n",
|
|
]
|
|
),
|
|
)
|
|
r = {
|
|
"CONTENT_LENGTH": len(payload),
|
|
"CONTENT_TYPE": client.MULTIPART_CONTENT,
|
|
"PATH_INFO": "/echo_content/",
|
|
"REQUEST_METHOD": "POST",
|
|
"wsgi.input": payload,
|
|
}
|
|
response = self.client.request(**r)
|
|
self.assertEqual(response.status_code, 400)
|
|
|
|
def test_fileupload_getlist(self):
|
|
file = tempfile.NamedTemporaryFile
|
|
with file() as file1, file() as file2, file() as file2a:
|
|
file1.write(b"a" * (2**23))
|
|
file1.seek(0)
|
|
|
|
file2.write(b"a" * (2 * 2**18))
|
|
file2.seek(0)
|
|
|
|
file2a.write(b"a" * (5 * 2**20))
|
|
file2a.seek(0)
|
|
|
|
response = self.client.post(
|
|
"/getlist_count/",
|
|
{
|
|
"file1": file1,
|
|
"field1": "test",
|
|
"field2": "test3",
|
|
"field3": "test5",
|
|
"field4": "test6",
|
|
"field5": "test7",
|
|
"file2": (file2, file2a),
|
|
},
|
|
)
|
|
got = response.json()
|
|
self.assertEqual(got.get("file1"), 1)
|
|
self.assertEqual(got.get("file2"), 2)
|
|
|
|
def test_fileuploads_closed_at_request_end(self):
|
|
file = tempfile.NamedTemporaryFile
|
|
with file() as f1, file() as f2a, file() as f2b:
|
|
response = self.client.post(
|
|
"/fd_closing/t/",
|
|
{
|
|
"file": f1,
|
|
"file2": (f2a, f2b),
|
|
},
|
|
)
|
|
|
|
request = response.wsgi_request
|
|
# The files were parsed.
|
|
self.assertTrue(hasattr(request, "_files"))
|
|
|
|
file = request._files["file"]
|
|
self.assertTrue(file.closed)
|
|
|
|
files = request._files.getlist("file2")
|
|
self.assertTrue(files[0].closed)
|
|
self.assertTrue(files[1].closed)
|
|
|
|
def test_no_parsing_triggered_by_fd_closing(self):
|
|
file = tempfile.NamedTemporaryFile
|
|
with file() as f1, file() as f2a, file() as f2b:
|
|
response = self.client.post(
|
|
"/fd_closing/f/",
|
|
{
|
|
"file": f1,
|
|
"file2": (f2a, f2b),
|
|
},
|
|
)
|
|
|
|
request = response.wsgi_request
|
|
# The fd closing logic doesn't trigger parsing of the stream
|
|
self.assertFalse(hasattr(request, "_files"))
|
|
|
|
def test_file_error_blocking(self):
|
|
"""
|
|
The server should not block when there are upload errors (bug #8622).
|
|
This can happen if something -- i.e. an exception handler -- tries to
|
|
access POST while handling an error in parsing POST. This shouldn't
|
|
cause an infinite loop!
|
|
"""
|
|
|
|
class POSTAccessingHandler(client.ClientHandler):
|
|
"""A handler that'll access POST during an exception."""
|
|
|
|
def handle_uncaught_exception(self, request, resolver, exc_info):
|
|
ret = super().handle_uncaught_exception(request, resolver, exc_info)
|
|
request.POST # evaluate
|
|
return ret
|
|
|
|
# Maybe this is a little more complicated that it needs to be; but if
|
|
# the django.test.client.FakePayload.read() implementation changes then
|
|
# this test would fail. So we need to know exactly what kind of error
|
|
# it raises when there is an attempt to read more than the available bytes:
|
|
try:
|
|
client.FakePayload(b"a").read(2)
|
|
except Exception as err:
|
|
reference_error = err
|
|
|
|
# install the custom handler that tries to access request.POST
|
|
self.client.handler = POSTAccessingHandler()
|
|
|
|
with open(__file__, "rb") as fp:
|
|
post_data = {
|
|
"name": "Ringo",
|
|
"file_field": fp,
|
|
}
|
|
try:
|
|
self.client.post("/upload_errors/", post_data)
|
|
except reference_error.__class__ as err:
|
|
self.assertNotEqual(
|
|
str(err),
|
|
str(reference_error),
|
|
"Caught a repeated exception that'll cause an infinite loop in "
|
|
"file uploads.",
|
|
)
|
|
except Exception as err:
|
|
# CustomUploadError is the error that should have been raised
|
|
self.assertEqual(err.__class__, uploadhandler.CustomUploadError)
|
|
|
|
def test_filename_case_preservation(self):
|
|
"""
|
|
The storage backend shouldn't mess with the case of the filenames
|
|
uploaded.
|
|
"""
|
|
# Synthesize the contents of a file upload with a mixed case filename
|
|
# so we don't have to carry such a file in the Django tests source code
|
|
# tree.
|
|
vars = {"boundary": "oUrBoUnDaRyStRiNg"}
|
|
post_data = [
|
|
"--%(boundary)s",
|
|
'Content-Disposition: form-data; name="file_field"; '
|
|
'filename="MiXeD_cAsE.txt"',
|
|
"Content-Type: application/octet-stream",
|
|
"",
|
|
"file contents\n",
|
|
"--%(boundary)s--\r\n",
|
|
]
|
|
response = self.client.post(
|
|
"/filename_case/",
|
|
"\r\n".join(post_data) % vars,
|
|
"multipart/form-data; boundary=%(boundary)s" % vars,
|
|
)
|
|
self.assertEqual(response.status_code, 200)
|
|
id = int(response.content)
|
|
obj = FileModel.objects.get(pk=id)
|
|
# The name of the file uploaded and the file stored in the server-side
|
|
# shouldn't differ.
|
|
self.assertEqual(os.path.basename(obj.testfile.path), "MiXeD_cAsE.txt")
|
|
|
|
def test_filename_traversal_upload(self):
|
|
os.makedirs(UPLOAD_TO, exist_ok=True)
|
|
tests = [
|
|
"../test.txt",
|
|
"../test.txt",
|
|
]
|
|
for file_name in tests:
|
|
with self.subTest(file_name=file_name):
|
|
payload = client.FakePayload()
|
|
payload.write(
|
|
"\r\n".join(
|
|
[
|
|
"--" + client.BOUNDARY,
|
|
'Content-Disposition: form-data; name="my_file"; '
|
|
'filename="%s";' % file_name,
|
|
"Content-Type: text/plain",
|
|
"",
|
|
"file contents.\r\n",
|
|
"\r\n--" + client.BOUNDARY + "--\r\n",
|
|
]
|
|
),
|
|
)
|
|
r = {
|
|
"CONTENT_LENGTH": len(payload),
|
|
"CONTENT_TYPE": client.MULTIPART_CONTENT,
|
|
"PATH_INFO": "/upload_traversal/",
|
|
"REQUEST_METHOD": "POST",
|
|
"wsgi.input": payload,
|
|
}
|
|
response = self.client.request(**r)
|
|
result = response.json()
|
|
self.assertEqual(response.status_code, 200)
|
|
self.assertEqual(result["file_name"], "test.txt")
|
|
self.assertIs(
|
|
os.path.exists(os.path.join(MEDIA_ROOT, "test.txt")),
|
|
False,
|
|
)
|
|
self.assertIs(
|
|
os.path.exists(os.path.join(UPLOAD_TO, "test.txt")),
|
|
True,
|
|
)
|
|
|
|
|
|
@override_settings(MEDIA_ROOT=MEDIA_ROOT)
|
|
class DirectoryCreationTests(SimpleTestCase):
|
|
"""
|
|
Tests for error handling during directory creation
|
|
via _save_FIELD_file (ticket #6450)
|
|
"""
|
|
|
|
@classmethod
|
|
def setUpClass(cls):
|
|
super().setUpClass()
|
|
os.makedirs(MEDIA_ROOT, exist_ok=True)
|
|
cls.addClassCleanup(shutil.rmtree, MEDIA_ROOT)
|
|
|
|
def setUp(self):
|
|
self.obj = FileModel()
|
|
|
|
@unittest.skipIf(
|
|
sys.platform == "win32", "Python on Windows doesn't have working os.chmod()."
|
|
)
|
|
@override_settings(
|
|
STORAGES={
|
|
DEFAULT_STORAGE_ALIAS: {
|
|
"BACKEND": "django.core.files.storage.FileSystemStorage",
|
|
}
|
|
}
|
|
)
|
|
def test_readonly_root(self):
|
|
"""Permission errors are not swallowed"""
|
|
os.chmod(MEDIA_ROOT, 0o500)
|
|
self.addCleanup(os.chmod, MEDIA_ROOT, 0o700)
|
|
with self.assertRaises(PermissionError):
|
|
self.obj.testfile.save(
|
|
"foo.txt", SimpleUploadedFile("foo.txt", b"x"), save=False
|
|
)
|
|
|
|
def test_not_a_directory(self):
|
|
default_storage.delete(UPLOAD_TO)
|
|
# Create a file with the upload directory name
|
|
with SimpleUploadedFile(UPLOAD_TO, b"x") as file:
|
|
default_storage.save(UPLOAD_FOLDER, file)
|
|
self.addCleanup(default_storage.delete, UPLOAD_TO)
|
|
msg = "%s exists and is not a directory." % UPLOAD_TO
|
|
with self.assertRaisesMessage(FileExistsError, msg):
|
|
with SimpleUploadedFile("foo.txt", b"x") as file:
|
|
self.obj.testfile.save("foo.txt", file, save=False)
|
|
|
|
|
|
class MultiParserTests(SimpleTestCase):
|
|
def test_empty_upload_handlers(self):
|
|
# We're not actually parsing here; just checking if the parser properly
|
|
# instantiates with empty upload handlers.
|
|
MultiPartParser(
|
|
{
|
|
"CONTENT_TYPE": "multipart/form-data; boundary=_foo",
|
|
"CONTENT_LENGTH": "1",
|
|
},
|
|
StringIO("x"),
|
|
[],
|
|
"utf-8",
|
|
)
|
|
|
|
def test_invalid_content_type(self):
|
|
with self.assertRaisesMessage(
|
|
MultiPartParserError, "Invalid Content-Type: text/plain"
|
|
):
|
|
MultiPartParser(
|
|
{
|
|
"CONTENT_TYPE": "text/plain",
|
|
"CONTENT_LENGTH": "1",
|
|
},
|
|
StringIO("x"),
|
|
[],
|
|
"utf-8",
|
|
)
|
|
|
|
def test_negative_content_length(self):
|
|
with self.assertRaisesMessage(
|
|
MultiPartParserError, "Invalid content length: -1"
|
|
):
|
|
MultiPartParser(
|
|
{
|
|
"CONTENT_TYPE": "multipart/form-data; boundary=_foo",
|
|
"CONTENT_LENGTH": -1,
|
|
},
|
|
StringIO("x"),
|
|
[],
|
|
"utf-8",
|
|
)
|
|
|
|
def test_bad_type_content_length(self):
|
|
multipart_parser = MultiPartParser(
|
|
{
|
|
"CONTENT_TYPE": "multipart/form-data; boundary=_foo",
|
|
"CONTENT_LENGTH": "a",
|
|
},
|
|
StringIO("x"),
|
|
[],
|
|
"utf-8",
|
|
)
|
|
self.assertEqual(multipart_parser._content_length, 0)
|
|
|
|
def test_sanitize_file_name(self):
|
|
parser = MultiPartParser(
|
|
{
|
|
"CONTENT_TYPE": "multipart/form-data; boundary=_foo",
|
|
"CONTENT_LENGTH": "1",
|
|
},
|
|
StringIO("x"),
|
|
[],
|
|
"utf-8",
|
|
)
|
|
for file_name in CANDIDATE_TRAVERSAL_FILE_NAMES:
|
|
with self.subTest(file_name=file_name):
|
|
self.assertEqual(parser.sanitize_file_name(file_name), "hax0rd.txt")
|
|
|
|
def test_sanitize_invalid_file_name(self):
|
|
parser = MultiPartParser(
|
|
{
|
|
"CONTENT_TYPE": "multipart/form-data; boundary=_foo",
|
|
"CONTENT_LENGTH": "1",
|
|
},
|
|
StringIO("x"),
|
|
[],
|
|
"utf-8",
|
|
)
|
|
for file_name in CANDIDATE_INVALID_FILE_NAMES:
|
|
with self.subTest(file_name=file_name):
|
|
self.assertIsNone(parser.sanitize_file_name(file_name))
|