449 lines
16 KiB
Python
449 lines
16 KiB
Python
import csv
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import io
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from os.path import dirname
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from os.path import join
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import pytest
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from werkzeug import formparser
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from werkzeug.datastructures import MultiDict
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from werkzeug.exceptions import RequestEntityTooLarge
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from werkzeug.formparser import FormDataParser
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from werkzeug.formparser import parse_form_data
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from werkzeug.test import Client
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from werkzeug.test import create_environ
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from werkzeug.wrappers import Request
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from werkzeug.wrappers import Response
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@Request.application
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def form_data_consumer(request):
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result_object = request.args["object"]
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if result_object == "text":
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return Response(repr(request.form["text"]))
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f = request.files[result_object]
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return Response(
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b"\n".join(
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(
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repr(f.filename).encode("ascii"),
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repr(f.name).encode("ascii"),
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repr(f.content_type).encode("ascii"),
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f.stream.read(),
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)
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)
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)
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def get_contents(filename):
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with open(filename, "rb") as f:
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return f.read()
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class TestFormParser:
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def test_limiting(self):
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data = b"foo=Hello+World&bar=baz"
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req = Request.from_values(
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input_stream=io.BytesIO(data),
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content_length=len(data),
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content_type="application/x-www-form-urlencoded",
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method="POST",
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)
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req.max_content_length = 400
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assert req.form["foo"] == "Hello World"
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req = Request.from_values(
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input_stream=io.BytesIO(data),
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content_length=len(data),
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content_type="application/x-www-form-urlencoded",
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method="POST",
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)
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req.max_form_memory_size = 7
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pytest.raises(RequestEntityTooLarge, lambda: req.form["foo"])
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req = Request.from_values(
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input_stream=io.BytesIO(data),
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content_length=len(data),
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content_type="application/x-www-form-urlencoded",
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method="POST",
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)
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req.max_form_memory_size = 400
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assert req.form["foo"] == "Hello World"
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data = (
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b"--foo\r\nContent-Disposition: form-field; name=foo\r\n\r\n"
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b"Hello World\r\n"
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b"--foo\r\nContent-Disposition: form-field; name=bar\r\n\r\n"
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b"bar=baz\r\n--foo--"
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)
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req = Request.from_values(
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input_stream=io.BytesIO(data),
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content_length=len(data),
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content_type="multipart/form-data; boundary=foo",
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method="POST",
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)
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req.max_content_length = 4
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pytest.raises(RequestEntityTooLarge, lambda: req.form["foo"])
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# when the request entity is too large, the input stream should be
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# drained so that firefox (and others) do not report connection reset
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# when run through gunicorn
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# a sufficiently large stream is necessary for block-based reads
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input_stream = io.BytesIO(b"foo=" + b"x" * 128 * 1024)
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req = Request.from_values(
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input_stream=input_stream,
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content_length=len(data),
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content_type="multipart/form-data; boundary=foo",
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method="POST",
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)
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req.max_content_length = 4
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pytest.raises(RequestEntityTooLarge, lambda: req.form["foo"])
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# ensure that the stream is exhausted
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assert input_stream.read() == b""
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req = Request.from_values(
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input_stream=io.BytesIO(data),
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content_length=len(data),
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content_type="multipart/form-data; boundary=foo",
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method="POST",
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)
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req.max_content_length = 400
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assert req.form["foo"] == "Hello World"
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req = Request.from_values(
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input_stream=io.BytesIO(data),
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content_length=len(data),
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content_type="multipart/form-data; boundary=foo",
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method="POST",
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)
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req.max_form_memory_size = 7
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pytest.raises(RequestEntityTooLarge, lambda: req.form["foo"])
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req = Request.from_values(
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input_stream=io.BytesIO(data),
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content_length=len(data),
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content_type="multipart/form-data; boundary=foo",
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method="POST",
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)
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req.max_form_memory_size = 400
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assert req.form["foo"] == "Hello World"
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def test_missing_multipart_boundary(self):
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data = (
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b"--foo\r\nContent-Disposition: form-field; name=foo\r\n\r\n"
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b"Hello World\r\n"
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b"--foo\r\nContent-Disposition: form-field; name=bar\r\n\r\n"
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b"bar=baz\r\n--foo--"
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)
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req = Request.from_values(
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input_stream=io.BytesIO(data),
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content_length=len(data),
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content_type="multipart/form-data",
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method="POST",
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)
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assert req.form == {}
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def test_parse_form_data_put_without_content(self):
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# A PUT without a Content-Type header returns empty data
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# Both rfc1945 and rfc2616 (1.0 and 1.1) say "Any HTTP/[1.0/1.1] message
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# containing an entity-body SHOULD include a Content-Type header field
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# defining the media type of that body." In the case where either
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# headers are omitted, parse_form_data should still work.
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env = create_environ("/foo", "http://example.org/", method="PUT")
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stream, form, files = formparser.parse_form_data(env)
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assert stream.read() == b""
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assert len(form) == 0
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assert len(files) == 0
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def test_parse_form_data_get_without_content(self):
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env = create_environ("/foo", "http://example.org/", method="GET")
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stream, form, files = formparser.parse_form_data(env)
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assert stream.read() == b""
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assert len(form) == 0
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assert len(files) == 0
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@pytest.mark.parametrize(
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("no_spooled", "size"), ((False, 100), (False, 3000), (True, 100), (True, 3000))
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)
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def test_default_stream_factory(self, no_spooled, size, monkeypatch):
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if no_spooled:
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monkeypatch.setattr("werkzeug.formparser.SpooledTemporaryFile", None)
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data = b"a,b,c\n" * size
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with Request.from_values(
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data={"foo": (io.BytesIO(data), "test.txt")}, method="POST"
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) as req:
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reader = csv.reader(io.TextIOWrapper(req.files["foo"]))
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# This fails if file_storage doesn't implement IOBase.
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# https://github.com/pallets/werkzeug/issues/1344
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# https://github.com/python/cpython/pull/3249
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assert sum(1 for _ in reader) == size
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def test_parse_bad_content_type(self):
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parser = FormDataParser()
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assert parser.parse("", "bad-mime-type", 0) == (
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"",
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MultiDict([]),
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MultiDict([]),
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)
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def test_parse_from_environ(self):
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parser = FormDataParser()
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stream, _, _ = parser.parse_from_environ({"wsgi.input": ""})
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assert stream is not None
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@pytest.mark.filterwarnings("ignore::pytest.PytestUnraisableExceptionWarning")
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class TestMultiPart:
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def test_basic(self):
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resources = join(dirname(__file__), "multipart")
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client = Client(form_data_consumer)
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repository = [
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(
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"firefox3-2png1txt",
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"---------------------------186454651713519341951581030105",
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[
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("anchor.png", "file1", "image/png", "file1.png"),
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("application_edit.png", "file2", "image/png", "file2.png"),
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],
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"example text",
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),
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(
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"firefox3-2pnglongtext",
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"---------------------------14904044739787191031754711748",
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[
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("accept.png", "file1", "image/png", "file1.png"),
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("add.png", "file2", "image/png", "file2.png"),
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],
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"--long text\r\n--with boundary\r\n--lookalikes--",
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),
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(
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"opera8-2png1txt",
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"----------zEO9jQKmLc2Cq88c23Dx19",
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[
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("arrow_branch.png", "file1", "image/png", "file1.png"),
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("award_star_bronze_1.png", "file2", "image/png", "file2.png"),
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],
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"blafasel öäü",
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),
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(
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"webkit3-2png1txt",
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"----WebKitFormBoundaryjdSFhcARk8fyGNy6",
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[
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("gtk-apply.png", "file1", "image/png", "file1.png"),
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("gtk-no.png", "file2", "image/png", "file2.png"),
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],
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"this is another text with ümläüts",
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),
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(
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"ie6-2png1txt",
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"---------------------------7d91b03a20128",
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[
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("file1.png", "file1", "image/x-png", "file1.png"),
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("file2.png", "file2", "image/x-png", "file2.png"),
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],
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"ie6 sucks :-/",
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),
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]
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for name, boundary, files, text in repository:
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folder = join(resources, name)
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data = get_contents(join(folder, "request.http"))
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for filename, field, content_type, fsname in files:
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with client.post(
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f"/?object={field}",
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data=data,
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content_type=f'multipart/form-data; boundary="{boundary}"',
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content_length=len(data),
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) as response:
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lines = response.get_data().split(b"\n", 3)
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assert lines[0] == repr(filename).encode("ascii")
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assert lines[1] == repr(field).encode("ascii")
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assert lines[2] == repr(content_type).encode("ascii")
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assert lines[3] == get_contents(join(folder, fsname))
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with client.post(
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"/?object=text",
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data=data,
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content_type=f'multipart/form-data; boundary="{boundary}"',
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content_length=len(data),
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) as response:
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assert response.get_data() == repr(text).encode("utf-8")
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@pytest.mark.filterwarnings("ignore::pytest.PytestUnraisableExceptionWarning")
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def test_ie7_unc_path(self):
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client = Client(form_data_consumer)
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data_file = join(dirname(__file__), "multipart", "ie7_full_path_request.http")
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data = get_contents(data_file)
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boundary = "---------------------------7da36d1b4a0164"
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with client.post(
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"/?object=cb_file_upload_multiple",
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data=data,
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content_type=f'multipart/form-data; boundary="{boundary}"',
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content_length=len(data),
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) as response:
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lines = response.get_data().split(b"\n", 3)
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assert lines[0] == b"'Sellersburg Town Council Meeting 02-22-2010doc.doc'"
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def test_end_of_file(self):
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# This test looks innocent but it was actually timing out in
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# the Werkzeug 0.5 release version (#394)
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data = (
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b"--foo\r\n"
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b'Content-Disposition: form-data; name="test"; filename="test.txt"\r\n'
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b"Content-Type: text/plain\r\n\r\n"
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b"file contents and no end"
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)
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with Request.from_values(
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input_stream=io.BytesIO(data),
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content_length=len(data),
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content_type="multipart/form-data; boundary=foo",
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method="POST",
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) as data:
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assert not data.files
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assert not data.form
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def test_file_no_content_type(self):
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data = (
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b"--foo\r\n"
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b'Content-Disposition: form-data; name="test"; filename="test.txt"\r\n\r\n'
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b"file contents\r\n--foo--"
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)
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with Request.from_values(
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input_stream=io.BytesIO(data),
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content_length=len(data),
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content_type="multipart/form-data; boundary=foo",
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method="POST",
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) as data:
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assert data.files["test"].filename == "test.txt"
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assert data.files["test"].read() == b"file contents"
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def test_extra_newline(self):
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# this test looks innocent but it was actually timing out in
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# the Werkzeug 0.5 release version (#394)
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data = (
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b"\r\n\r\n--foo\r\n"
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b'Content-Disposition: form-data; name="foo"\r\n\r\n'
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b"a string\r\n"
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b"--foo--"
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)
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data = Request.from_values(
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input_stream=io.BytesIO(data),
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content_length=len(data),
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content_type="multipart/form-data; boundary=foo",
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method="POST",
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)
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assert not data.files
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assert data.form["foo"] == "a string"
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def test_headers(self):
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data = (
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b"--foo\r\n"
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b'Content-Disposition: form-data; name="foo"; filename="foo.txt"\r\n'
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b"X-Custom-Header: blah\r\n"
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b"Content-Type: text/plain; charset=utf-8\r\n\r\n"
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b"file contents, just the contents\r\n"
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b"--foo--"
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)
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with Request.from_values(
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input_stream=io.BytesIO(data),
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content_length=len(data),
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content_type="multipart/form-data; boundary=foo",
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method="POST",
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) as req:
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foo = req.files["foo"]
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assert foo.mimetype == "text/plain"
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assert foo.mimetype_params == {"charset": "utf-8"}
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assert foo.headers["content-type"] == foo.content_type
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assert foo.content_type == "text/plain; charset=utf-8"
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assert foo.headers["x-custom-header"] == "blah"
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@pytest.mark.parametrize("ending", [b"\n", b"\r", b"\r\n"])
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def test_nonstandard_line_endings(self, ending: bytes):
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data = ending.join(
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(
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b"--foo",
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b"Content-Disposition: form-data; name=foo",
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b"",
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b"this is just bar",
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b"--foo",
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b"Content-Disposition: form-data; name=bar",
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b"",
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b"blafasel",
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b"--foo--",
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)
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)
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req = Request.from_values(
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input_stream=io.BytesIO(data),
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content_length=len(data),
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content_type="multipart/form-data; boundary=foo",
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method="POST",
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)
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assert req.form["foo"] == "this is just bar"
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assert req.form["bar"] == "blafasel"
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def test_failures(self):
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def parse_multipart(stream, boundary, content_length):
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parser = formparser.MultiPartParser(content_length)
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return parser.parse(stream, boundary, content_length)
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data = b"--foo\r\n\r\nHello World\r\n--foo--"
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pytest.raises(ValueError, parse_multipart, io.BytesIO(data), b"foo", len(data))
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data = (
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b"--foo\r\nContent-Disposition: form-field; name=foo\r\n\r\nHello World\r\n"
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)
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pytest.raises(ValueError, parse_multipart, io.BytesIO(data), b"foo", len(data))
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def test_empty_multipart(self):
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environ = {}
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data = b"--boundary--"
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environ["REQUEST_METHOD"] = "POST"
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environ["CONTENT_TYPE"] = "multipart/form-data; boundary=boundary"
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environ["CONTENT_LENGTH"] = str(len(data))
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environ["wsgi.input"] = io.BytesIO(data)
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stream, form, files = parse_form_data(environ, silent=False)
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rv = stream.read()
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assert rv == b""
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assert form == MultiDict()
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assert files == MultiDict()
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class TestMultiPartParser:
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def test_constructor_not_pass_stream_factory_and_cls(self):
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parser = formparser.MultiPartParser()
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assert parser.stream_factory is formparser.default_stream_factory
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assert parser.cls is MultiDict
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def test_constructor_pass_stream_factory_and_cls(self):
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def stream_factory():
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pass
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parser = formparser.MultiPartParser(stream_factory=stream_factory, cls=dict)
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assert parser.stream_factory is stream_factory
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assert parser.cls is dict
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def test_file_rfc2231_filename_continuations(self):
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data = (
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b"--foo\r\n"
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b"Content-Type: text/plain; charset=utf-8\r\n"
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b"Content-Disposition: form-data; name=rfc2231;\r\n"
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b" filename*0*=ascii''a%20b%20;\r\n"
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b" filename*1*=c%20d%20;\r\n"
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b' filename*2="e f.txt"\r\n\r\n'
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b"file contents\r\n--foo--"
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)
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with Request.from_values(
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input_stream=io.BytesIO(data),
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content_length=len(data),
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content_type="multipart/form-data; boundary=foo",
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method="POST",
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) as request:
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assert request.files["rfc2231"].filename == "a b c d e f.txt"
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assert request.files["rfc2231"].read() == b"file contents"
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