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9baf692a58
Thanks Tim Graham for polishing the patch, updating the tests, and writing documentation. Thanks Carl Meyer for shepherding the DEP.
630 lines
24 KiB
Python
630 lines
24 KiB
Python
#! -*- coding: utf-8 -*-
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from __future__ import unicode_literals
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import base64
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import errno
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import hashlib
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import json
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import os
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import shutil
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import tempfile as sys_tempfile
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import unittest
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from io import BytesIO
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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 django.utils.encoding import force_bytes
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from django.utils.http import urlquote
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from django.utils.six import PY2, StringIO
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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(FileUploadTests, cls).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(FileUploadTests, cls).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(force_bytes(post_data[key])).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(force_bytes(content)) + 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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received = json.loads(response.content.decode('utf-8'))
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self.assertEqual(received['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(
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# encodestring is a deprecated alias on Python 3
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"Big data" * 68000, encode=base64.encodestring if PY2 else base64.encodebytes)
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def test_unicode_file_name(self):
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tdir = sys_tempfile.mkdtemp()
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self.addCleanup(shutil.rmtree, tdir, True)
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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(tdir, 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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post_data = {
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'file_unicode': file1,
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}
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response = self.client.post('/unicode_name/', post_data)
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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' % urlquote(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' % urlquote(
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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 = json.loads(response.content.decode('utf-8'))
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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 = json.loads(response.content.decode('utf-8'))
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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 = json.loads(response.content.decode('utf-8'))
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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 = json.loads(response.content.decode('utf-8'))
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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 = json.loads(response.content.decode('utf-8'))
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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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got = json.loads(self.client.request(**r).content.decode('utf-8'))
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self.assertEqual(got, {})
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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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got = json.loads(self.client.request(**r).content.decode('utf-8'))
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self.assertEqual(got, {})
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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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response = self.client.post('/quota/', {'f': smallfile})
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got = json.loads(response.content.decode('utf-8'))
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self.assertIn('f', got)
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# Large files don't go through.
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response = self.client.post("/quota/", {'f': bigfile})
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got = json.loads(response.content.decode('utf-8'))
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self.assertNotIn('f', got)
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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 = json.loads(response.content.decode('utf-8'))
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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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# Check that the files got actually 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
|
|
# Check that 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(POSTAccessingHandler, self).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.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(DirectoryCreationTests, cls).setUpClass()
|
|
if not os.path.isdir(MEDIA_ROOT):
|
|
os.makedirs(MEDIA_ROOT)
|
|
|
|
@classmethod
|
|
def tearDownClass(cls):
|
|
shutil.rmtree(MEDIA_ROOT)
|
|
super(DirectoryCreationTests, cls).tearDownClass()
|
|
|
|
def setUp(self):
|
|
self.obj = FileModel()
|
|
|
|
def test_readonly_root(self):
|
|
"""Permission errors are not swallowed"""
|
|
os.chmod(MEDIA_ROOT, 0o500)
|
|
self.addCleanup(os.chmod, MEDIA_ROOT, 0o700)
|
|
try:
|
|
self.obj.testfile.save('foo.txt', SimpleUploadedFile('foo.txt', b'x'), save=False)
|
|
except OSError as err:
|
|
self.assertEqual(err.errno, errno.EACCES)
|
|
except Exception:
|
|
self.fail("OSError [Errno %s] not raised." % errno.EACCES)
|
|
|
|
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)
|