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import pytest
from werkzeug.middleware.proxy_fix import ProxyFix
from werkzeug.routing import Map
from werkzeug.routing import Rule
from werkzeug.test import create_environ
from werkzeug.utils import redirect
from werkzeug.wrappers import Request
from werkzeug.wrappers import Response
@pytest.mark.parametrize(
("kwargs", "base", "url_root"),
(
pytest.param(
{},
{
"REMOTE_ADDR": "192.168.0.2",
"HTTP_HOST": "spam",
"HTTP_X_FORWARDED_FOR": "192.168.0.1",
"HTTP_X_FORWARDED_PROTO": "https",
},
"https://spam/",
id="for",
),
pytest.param(
{"x_proto": 1},
{"HTTP_HOST": "spam", "HTTP_X_FORWARDED_PROTO": "https"},
"https://spam/",
id="proto",
),
pytest.param(
{"x_host": 1},
{"HTTP_HOST": "spam", "HTTP_X_FORWARDED_HOST": "eggs"},
"http://eggs/",
id="host",
),
pytest.param(
{"x_port": 1},
{"HTTP_HOST": "spam", "HTTP_X_FORWARDED_PORT": "8080"},
"http://spam:8080/",
id="port, host without port",
),
pytest.param(
{"x_port": 1},
{"HTTP_HOST": "spam:9000", "HTTP_X_FORWARDED_PORT": "8080"},
"http://spam:8080/",
id="port, host with port",
),
pytest.param(
{"x_port": 1},
{
"SERVER_NAME": "spam",
"SERVER_PORT": "9000",
"HTTP_X_FORWARDED_PORT": "8080",
},
"http://spam:8080/",
id="port, name",
),
pytest.param(
{"x_prefix": 1},
{"HTTP_HOST": "spam", "HTTP_X_FORWARDED_PREFIX": "/eggs"},
"http://spam/eggs/",
id="prefix",
),
pytest.param(
{"x_for": 1, "x_proto": 1, "x_host": 1, "x_port": 1, "x_prefix": 1},
{
"REMOTE_ADDR": "192.168.0.2",
"HTTP_HOST": "spam:9000",
"HTTP_X_FORWARDED_FOR": "192.168.0.1",
"HTTP_X_FORWARDED_PROTO": "https",
"HTTP_X_FORWARDED_HOST": "eggs",
"HTTP_X_FORWARDED_PORT": "443",
"HTTP_X_FORWARDED_PREFIX": "/ham",
},
"https://eggs/ham/",
id="all",
),
pytest.param(
{"x_for": 2},
{
"REMOTE_ADDR": "192.168.0.3",
"HTTP_HOST": "spam",
"HTTP_X_FORWARDED_FOR": "192.168.0.1, 192.168.0.2",
},
"http://spam/",
id="multiple for",
),
pytest.param(
{"x_for": 0},
{
"REMOTE_ADDR": "192.168.0.1",
"HTTP_HOST": "spam",
"HTTP_X_FORWARDED_FOR": "192.168.0.2",
},
"http://spam/",
id="ignore 0",
),
pytest.param(
{"x_for": 3},
{
"REMOTE_ADDR": "192.168.0.1",
"HTTP_HOST": "spam",
"HTTP_X_FORWARDED_FOR": "192.168.0.3, 192.168.0.2",
},
"http://spam/",
id="ignore len < trusted",
),
pytest.param(
{},
{
"REMOTE_ADDR": "192.168.0.2",
"HTTP_HOST": "spam",
"HTTP_X_FORWARDED_FOR": "192.168.0.3, 192.168.0.1",
},
"http://spam/",
id="ignore untrusted",
),
pytest.param(
{"x_for": 2},
{
"REMOTE_ADDR": "192.168.0.1",
"HTTP_HOST": "spam",
"HTTP_X_FORWARDED_FOR": ", 192.168.0.3",
},
"http://spam/",
id="ignore empty",
),
pytest.param(
{"x_for": 2, "x_prefix": 1},
{
"REMOTE_ADDR": "192.168.0.2",
"HTTP_HOST": "spam",
"HTTP_X_FORWARDED_FOR": "192.168.0.1, 192.168.0.3",
"HTTP_X_FORWARDED_PREFIX": "/ham, /eggs",
},
"http://spam/eggs/",
id="prefix < for",
),
),
)
def test_proxy_fix(kwargs, base, url_root):
@Request.application
def app(request):
# for header
assert request.remote_addr == "192.168.0.1"
# proto, host, port, prefix headers
assert request.url_root == url_root
urls = url_map.bind_to_environ(request.environ)
# build includes prefix
assert urls.build("parrot") == "/".join((request.script_root, "parrot"))
# match doesn't include prefix
assert urls.match("/parrot")[0] == "parrot"
return Response("success")
url_map = Map([Rule("/parrot", endpoint="parrot")])
app = ProxyFix(app, **kwargs)
base.setdefault("REMOTE_ADDR", "192.168.0.1")
environ = create_environ(environ_overrides=base)
# host is always added, remove it if the test doesn't set it
if "HTTP_HOST" not in base:
del environ["HTTP_HOST"]
# ensure app request has correct headers
response = Response.from_app(app, environ)
assert response.get_data() == b"success"
# ensure redirect location is correct
redirect_app = redirect(url_map.bind_to_environ(environ).build("parrot"))
response = Response.from_app(redirect_app, environ)
location = response.headers["Location"]
assert location == url_root + "parrot"
|
