600 lines
23 KiB
Python
600 lines
23 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 urllib.parse import quote
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from django.core.files import temp as tempfile
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from django.core.files.uploadedfile import SimpleUploadedFile
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from django.http.multipartparser import MultiPartParser, parse_header
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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_TO = os.path.join(MEDIA_ROOT, 'test_upload')
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@override_settings(MEDIA_ROOT=MEDIA_ROOT, ROOT_URLCONF='file_uploads.urls', MIDDLEWARE=[])
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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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if not os.path.isdir(MEDIA_ROOT):
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os.makedirs(MEDIA_ROOT)
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@classmethod
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def tearDownClass(cls):
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shutil.rmtree(MEDIA_ROOT)
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super().tearDownClass()
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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(post_data[key].read()).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(post_data[key].encode()).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("\r\n".join([
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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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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_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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Test receiving file upload when filename is encoded with RFC2231
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(#22971).
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"""
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payload = client.FakePayload()
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payload.write('\r\n'.join([
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'--' + client.BOUNDARY,
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'Content-Disposition: form-data; name="file_unicode"; 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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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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Test receiving file upload when filename is encoded with RFC2231
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(#22971).
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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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'--' + client.BOUNDARY,
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'Content-Disposition: form-data; name*=UTF-8\'\'file_unicode; filename*=UTF-8\'\'%s' % quote(
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UNICODE_FILENAME
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),
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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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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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# The second value is normalized to an empty name by
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# MultiPartParser.IE_sanitize()
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filenames = ['', 'C:\\Windows\\']
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payload = client.FakePayload()
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for i, name in enumerate(filenames):
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payload.write('\r\n'.join([
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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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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_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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scary_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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]
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payload = client.FakePayload()
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for i, name in enumerate(scary_file_names):
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payload.write('\r\n'.join([
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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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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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# 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(scary_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):
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"""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]),
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]
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payload = client.FakePayload()
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for name, filename, _ in cases:
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payload.write("\r\n".join([
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'--' + client.BOUNDARY,
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'Content-Disposition: form-data; name="{}"; filename="{}"',
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'Content-Type: application/octet-stream',
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'',
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'Oops.',
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''
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]).format(name, filename))
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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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result = response.json()
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for name, _, expected in cases:
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got = result[name]
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self.assertEqual(expected, got, 'Mismatch for {}'.format(name))
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self.assertLess(len(got), 256,
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"Got a long file name (%s characters)." % len(got))
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def test_file_content(self):
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file = tempfile.NamedTemporaryFile
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with file(suffix=".ctype_extra") as no_content_type, file(suffix=".ctype_extra") as simple_file:
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no_content_type.write(b'no content')
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no_content_type.seek(0)
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simple_file.write(b'text content')
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simple_file.seek(0)
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simple_file.content_type = 'text/plain'
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string_io = StringIO('string content')
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bytes_io = BytesIO(b'binary content')
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response = self.client.post('/echo_content/', {
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'no_content_type': no_content_type,
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'simple_file': simple_file,
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'string': string_io,
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'binary': bytes_io,
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})
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received = response.json()
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self.assertEqual(received['no_content_type'], 'no content')
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self.assertEqual(received['simple_file'], 'text content')
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self.assertEqual(received['string'], 'string content')
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self.assertEqual(received['binary'], 'binary content')
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def test_content_type_extra(self):
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"""Uploaded files may have content type parameters available."""
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file = tempfile.NamedTemporaryFile
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with file(suffix=".ctype_extra") as no_content_type, file(suffix=".ctype_extra") as simple_file:
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no_content_type.write(b'something')
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no_content_type.seek(0)
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simple_file.write(b'something')
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simple_file.seek(0)
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simple_file.content_type = 'text/plain; test-key=test_value'
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response = self.client.post('/echo_content_type_extra/', {
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'no_content_type': no_content_type,
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'simple_file': simple_file,
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})
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received = response.json()
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self.assertEqual(received['no_content_type'], {})
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self.assertEqual(received['simple_file'], {'test-key': 'test_value'})
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def test_truncated_multipart_handled_gracefully(self):
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"""
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If passed an incomplete multipart message, MultiPartParser does not
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attempt to read beyond the end of the stream, and simply will handle
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the part that can be parsed gracefully.
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"""
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payload_str = "\r\n".join([
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'--' + client.BOUNDARY,
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'Content-Disposition: form-data; name="file"; filename="foo.txt"',
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'Content-Type: application/octet-stream',
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'',
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'file contents'
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'--' + client.BOUNDARY + '--',
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'',
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])
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payload = client.FakePayload(payload_str[:-10])
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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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self.assertEqual(self.client.request(**r).json(), {})
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def test_empty_multipart_handled_gracefully(self):
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"""
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If passed an empty multipart message, MultiPartParser will return
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an empty QueryDict.
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"""
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r = {
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'CONTENT_LENGTH': 0,
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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': client.FakePayload(b''),
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}
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self.assertEqual(self.client.request(**r).json(), {})
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def test_custom_upload_handler(self):
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file = tempfile.NamedTemporaryFile
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with file() as smallfile, file() as bigfile:
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# A small file (under the 5M quota)
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smallfile.write(b'a' * (2 ** 21))
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smallfile.seek(0)
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# A big file (over the quota)
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bigfile.write(b'a' * (10 * 2 ** 20))
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bigfile.seek(0)
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# Small file posting should work.
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self.assertIn('f', self.client.post('/quota/', {'f': smallfile}).json())
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# Large files don't go through.
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self.assertNotIn('f', self.client.post("/quota/", {'f': bigfile}).json())
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def test_broken_custom_upload_handler(self):
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with tempfile.NamedTemporaryFile() as file:
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file.write(b'a' * (2 ** 21))
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file.seek(0)
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# AttributeError: You cannot alter upload handlers after the upload has been processed.
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with self.assertRaises(AttributeError):
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self.client.post('/quota/broken/', {'f': file})
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def test_fileupload_getlist(self):
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file = tempfile.NamedTemporaryFile
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with file() as file1, file() as file2, file() as file2a:
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file1.write(b'a' * (2 ** 23))
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file1.seek(0)
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file2.write(b'a' * (2 * 2 ** 18))
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file2.seek(0)
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file2a.write(b'a' * (5 * 2 ** 20))
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file2a.seek(0)
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response = self.client.post('/getlist_count/', {
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'file1': file1,
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'field1': 'test',
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'field2': 'test3',
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'field3': 'test5',
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'field4': 'test6',
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'field5': 'test7',
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'file2': (file2, file2a)
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})
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got = response.json()
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self.assertEqual(got.get('file1'), 1)
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self.assertEqual(got.get('file2'), 2)
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def test_fileuploads_closed_at_request_end(self):
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file = tempfile.NamedTemporaryFile
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with file() as f1, file() as f2a, file() as f2b:
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response = self.client.post('/fd_closing/t/', {
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'file': f1,
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'file2': (f2a, f2b),
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})
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request = response.wsgi_request
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# The files were parsed.
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self.assertTrue(hasattr(request, '_files'))
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file = request._files['file']
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self.assertTrue(file.closed)
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files = request._files.getlist('file2')
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self.assertTrue(files[0].closed)
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self.assertTrue(files[1].closed)
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def test_no_parsing_triggered_by_fd_closing(self):
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file = tempfile.NamedTemporaryFile
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with file() as f1, file() as f2a, file() as f2b:
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response = self.client.post('/fd_closing/f/', {
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'file': f1,
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'file2': (f2a, f2b),
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})
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request = response.wsgi_request
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# The fd closing logic doesn't trigger parsing of the stream
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self.assertFalse(hasattr(request, '_files'))
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def test_file_error_blocking(self):
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"""
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The server should not block when there are upload errors (bug #8622).
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This can happen if something -- i.e. an exception handler -- tries to
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access POST while handling an error in parsing POST. This shouldn't
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cause an infinite loop!
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"""
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class POSTAccessingHandler(client.ClientHandler):
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"""A handler that'll access POST during an exception."""
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def handle_uncaught_exception(self, request, resolver, exc_info):
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ret = super().handle_uncaught_exception(request, resolver, exc_info)
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request.POST # evaluate
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return ret
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# Maybe this is a little more complicated that it needs to be; but if
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# the django.test.client.FakePayload.read() implementation changes then
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# this test would fail. So we need to know exactly what kind of error
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# it raises when there is an attempt to read more than the available bytes:
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try:
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client.FakePayload(b'a').read(2)
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except Exception as err:
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reference_error = err
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# install the custom handler that tries to access request.POST
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self.client.handler = POSTAccessingHandler()
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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.assertFalse(
|
|
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')
|
|
|
|
|
|
@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()
|
|
if not os.path.isdir(MEDIA_ROOT):
|
|
os.makedirs(MEDIA_ROOT)
|
|
|
|
@classmethod
|
|
def tearDownClass(cls):
|
|
shutil.rmtree(MEDIA_ROOT)
|
|
super().tearDownClass()
|
|
|
|
def setUp(self):
|
|
self.obj = FileModel()
|
|
|
|
@unittest.skipIf(sys.platform == 'win32', "Python on Windows doesn't have working os.chmod().")
|
|
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):
|
|
"""The correct IOError is raised when the upload directory name exists but isn't a directory"""
|
|
# Create a file with the upload directory name
|
|
open(UPLOAD_TO, 'wb').close()
|
|
self.addCleanup(os.remove, UPLOAD_TO)
|
|
with self.assertRaises(IOError) as exc_info:
|
|
with SimpleUploadedFile('foo.txt', b'x') as file:
|
|
self.obj.testfile.save('foo.txt', file, save=False)
|
|
# The test needs to be done on a specific string as IOError
|
|
# is raised even without the patch (just not early enough)
|
|
self.assertEqual(exc_info.exception.args[0], "%s exists and is not a directory." % UPLOAD_TO)
|
|
|
|
|
|
class MultiParserTests(unittest.TestCase):
|
|
|
|
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_rfc2231_parsing(self):
|
|
test_data = (
|
|
(b"Content-Type: application/x-stuff; title*=us-ascii'en-us'This%20is%20%2A%2A%2Afun%2A%2A%2A",
|
|
"This is ***fun***"),
|
|
(b"Content-Type: application/x-stuff; title*=UTF-8''foo-%c3%a4.html",
|
|
"foo-ä.html"),
|
|
(b"Content-Type: application/x-stuff; title*=iso-8859-1''foo-%E4.html",
|
|
"foo-ä.html"),
|
|
)
|
|
for raw_line, expected_title in test_data:
|
|
parsed = parse_header(raw_line)
|
|
self.assertEqual(parsed[1]['title'], expected_title)
|
|
|
|
def test_rfc2231_wrong_title(self):
|
|
"""
|
|
Test wrongly formatted RFC 2231 headers (missing double single quotes).
|
|
Parsing should not crash (#24209).
|
|
"""
|
|
test_data = (
|
|
(b"Content-Type: application/x-stuff; title*='This%20is%20%2A%2A%2Afun%2A%2A%2A",
|
|
b"'This%20is%20%2A%2A%2Afun%2A%2A%2A"),
|
|
(b"Content-Type: application/x-stuff; title*='foo.html",
|
|
b"'foo.html"),
|
|
(b"Content-Type: application/x-stuff; title*=bar.html",
|
|
b"bar.html"),
|
|
)
|
|
for raw_line, expected_title in test_data:
|
|
parsed = parse_header(raw_line)
|
|
self.assertEqual(parsed[1]['title'], expected_title)
|