406 lines
15 KiB
Python
406 lines
15 KiB
Python
#! -*- coding: utf-8 -*-
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from __future__ import absolute_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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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
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from django.test import TestCase, client
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from django.utils.encoding import smart_bytes
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from django.utils.six import StringIO
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from django.utils import unittest
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from . import uploadhandler
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from .models import FileModel, temp_storage, UPLOAD_TO
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UNICODE_FILENAME = 'test-0123456789_中文_Orléans.jpg'
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class FileUploadTests(TestCase):
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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('/file_uploads/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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tdir = tempfile.gettempdir()
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file1 = tempfile.NamedTemporaryFile(suffix=".file1", dir=tdir)
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file1.write(b'a' * (2 ** 21))
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file1.seek(0)
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file2 = tempfile.NamedTemporaryFile(suffix=".file2", dir=tdir)
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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(smart_bytes(post_data[key])).hexdigest()
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response = self.client.post('/file_uploads/verify/', post_data)
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self.assertEqual(response.status_code, 200)
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def test_base64_upload(self):
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test_string = "This data will be transmitted base64-encoded."
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payload = "\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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base64.b64encode(smart_bytes(test_string)).decode('ascii'),
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'--' + client.BOUNDARY + '--',
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'',
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]).encode('utf-8')
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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': "/file_uploads/echo_content/",
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'REQUEST_METHOD': 'POST',
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'wsgi.input': client.FakePayload(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'], test_string)
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def test_unicode_file_name(self):
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tdir = tempfile.gettempdir()
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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('/file_uploads/unicode_name/', post_data)
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try:
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os.unlink(file1.name)
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except:
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pass
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self.assertEqual(response.status_code, 200)
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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-syle.
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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 = []
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for i, name in enumerate(scary_file_names):
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payload.extend([
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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.'
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])
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payload.extend([
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'--' + client.BOUNDARY + '--',
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'',
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])
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payload = "\r\n".join(payload).encode('utf-8')
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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': "/file_uploads/echo/",
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'REQUEST_METHOD': 'POST',
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'wsgi.input': client.FakePayload(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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recieved = json.loads(response.content.decode('utf-8'))
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for i, name in enumerate(scary_file_names):
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got = recieved["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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name = "%s.txt" % ("f"*500)
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payload = "\r\n".join([
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'--' + client.BOUNDARY,
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'Content-Disposition: form-data; name="file"; filename="%s"' % name,
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'Content-Type: application/octet-stream',
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'',
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'Oops.'
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'--' + client.BOUNDARY + '--',
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'',
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]).encode('utf-8')
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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': "/file_uploads/echo/",
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'REQUEST_METHOD': 'POST',
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'wsgi.input': client.FakePayload(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.assertTrue(len(got['file']) < 256, "Got a long file name (%s characters)." % len(got['file']))
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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 = "\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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]).encode('utf-8')
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payload = payload[:-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': '/file_uploads/echo/',
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'REQUEST_METHOD': 'POST',
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'wsgi.input': client.FakePayload(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': '/file_uploads/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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# A small file (under the 5M quota)
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smallfile = tempfile.NamedTemporaryFile()
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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 = tempfile.NamedTemporaryFile()
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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('/file_uploads/quota/', {'f': smallfile})
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got = json.loads(response.content.decode('utf-8'))
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self.assertTrue('f' in got)
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# Large files don't go through.
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response = self.client.post("/file_uploads/quota/", {'f': bigfile})
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got = json.loads(response.content.decode('utf-8'))
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self.assertTrue('f' not in got)
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def test_broken_custom_upload_handler(self):
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f = tempfile.NamedTemporaryFile()
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f.write(b'a' * (2 ** 21))
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f.seek(0)
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# AttributeError: You cannot alter upload handlers after the upload has been processed.
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self.assertRaises(
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AttributeError,
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self.client.post,
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'/file_uploads/quota/broken/',
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{'f': f}
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)
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def test_fileupload_getlist(self):
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file1 = tempfile.NamedTemporaryFile()
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file1.write(b'a' * (2 ** 23))
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file1.seek(0)
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file2 = tempfile.NamedTemporaryFile()
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file2.write(b'a' * (2 * 2 ** 18))
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file2.seek(0)
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file2a = tempfile.NamedTemporaryFile()
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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('/file_uploads/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_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(POSTAccessingHandler, self).handle_uncaught_exception(request, resolver, exc_info)
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p = request.POST
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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:
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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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try:
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response = self.client.post('/file_uploads/upload_errors/', post_data)
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except reference_error.__class__ as err:
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self.assertFalse(
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str(err) == str(reference_error),
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"Caught a repeated exception that'll cause an infinite loop in file uploads."
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)
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except Exception as err:
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# CustomUploadError is the error that should have been raised
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self.assertEqual(err.__class__, uploadhandler.CustomUploadError)
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def test_filename_case_preservation(self):
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"""
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The storage backend shouldn't mess with the case of the filenames
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uploaded.
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"""
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# Synthesize the contents of a file upload with a mixed case filename
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# so we don't have to carry such a file in the Django tests source code
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# tree.
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vars = {'boundary': 'oUrBoUnDaRyStRiNg'}
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post_data = [
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'--%(boundary)s',
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'Content-Disposition: form-data; name="file_field"; '
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'filename="MiXeD_cAsE.txt"',
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'Content-Type: application/octet-stream',
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'',
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'file contents\n'
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'',
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'--%(boundary)s--\r\n',
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]
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response = self.client.post(
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'/file_uploads/filename_case/',
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'\r\n'.join(post_data) % vars,
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'multipart/form-data; boundary=%(boundary)s' % vars
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)
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self.assertEqual(response.status_code, 200)
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id = int(response.content)
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obj = FileModel.objects.get(pk=id)
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# The name of the file uploaded and the file stored in the server-side
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# shouldn't differ.
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self.assertEqual(os.path.basename(obj.testfile.path), 'MiXeD_cAsE.txt')
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class DirectoryCreationTests(unittest.TestCase):
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"""
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Tests for error handling during directory creation
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via _save_FIELD_file (ticket #6450)
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"""
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def setUp(self):
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self.obj = FileModel()
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if not os.path.isdir(temp_storage.location):
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os.makedirs(temp_storage.location)
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if os.path.isdir(UPLOAD_TO):
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os.chmod(UPLOAD_TO, 0o700)
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shutil.rmtree(UPLOAD_TO)
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def tearDown(self):
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os.chmod(temp_storage.location, 0o700)
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shutil.rmtree(temp_storage.location)
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def test_readonly_root(self):
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"""Permission errors are not swallowed"""
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os.chmod(temp_storage.location, 0o500)
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try:
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self.obj.testfile.save('foo.txt', SimpleUploadedFile('foo.txt', b'x'))
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except OSError as err:
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self.assertEqual(err.errno, errno.EACCES)
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except Exception:
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self.fail("OSError [Errno %s] not raised." % errno.EACCES)
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def test_not_a_directory(self):
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"""The correct IOError is raised when the upload directory name exists but isn't a directory"""
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# Create a file with the upload directory name
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open(UPLOAD_TO, 'wb').close()
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try:
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self.obj.testfile.save('foo.txt', SimpleUploadedFile('foo.txt', b'x'))
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except IOError as err:
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# The test needs to be done on a specific string as IOError
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# is raised even without the patch (just not early enough)
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self.assertEqual(err.args[0],
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"%s exists and is not a directory." % UPLOAD_TO)
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except:
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self.fail("IOError not raised")
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class MultiParserTests(unittest.TestCase):
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def test_empty_upload_handlers(self):
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# We're not actually parsing here; just checking if the parser properly
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# instantiates with empty upload handlers.
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parser = MultiPartParser({
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'CONTENT_TYPE': 'multipart/form-data; boundary=_foo',
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'CONTENT_LENGTH': '1'
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}, StringIO('x'), [], 'utf-8')
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