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test_web_middleware.py
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import re
import pytest
from aiohttp import web
async def test_middleware_modifies_response(loop, aiohttp_client):
async def handler(request):
return web.Response(body=b'OK')
@web.middleware
async def middleware(request, handler):
resp = await handler(request)
assert 200 == resp.status
resp.set_status(201)
resp.text = resp.text + '[MIDDLEWARE]'
return resp
app = web.Application()
app.middlewares.append(middleware)
app.router.add_route('GET', '/', handler)
client = await aiohttp_client(app)
resp = await client.get('/')
assert 201 == resp.status
txt = await resp.text()
assert 'OK[MIDDLEWARE]' == txt
async def test_middleware_handles_exception(loop, aiohttp_client):
async def handler(request):
raise RuntimeError('Error text')
@web.middleware
async def middleware(request, handler):
with pytest.raises(RuntimeError) as ctx:
await handler(request)
return web.Response(status=501,
text=str(ctx.value) + '[MIDDLEWARE]')
app = web.Application()
app.middlewares.append(middleware)
app.router.add_route('GET', '/', handler)
client = await aiohttp_client(app)
resp = await client.get('/')
assert 501 == resp.status
txt = await resp.text()
assert 'Error text[MIDDLEWARE]' == txt
async def test_middleware_chain(loop, aiohttp_client):
async def handler(request):
return web.Response(text='OK')
def make_middleware(num):
@web.middleware
async def middleware(request, handler):
resp = await handler(request)
resp.text = resp.text + '[{}]'.format(num)
return resp
return middleware
app = web.Application()
app.middlewares.append(make_middleware(1))
app.middlewares.append(make_middleware(2))
app.router.add_route('GET', '/', handler)
client = await aiohttp_client(app)
resp = await client.get('/')
assert 200 == resp.status
txt = await resp.text()
assert 'OK[2][1]' == txt
@pytest.fixture
def cli(loop, aiohttp_client):
async def handler(request):
return web.Response(text="OK")
def wrapper(extra_middlewares):
app = web.Application()
app.router.add_route(
'GET', '/resource1', handler)
app.router.add_route(
'GET', '/resource2/', handler)
app.router.add_route(
'GET', '/resource1/a/b', handler)
app.router.add_route(
'GET', '/resource2/a/b/', handler)
app.router.add_route(
'GET', '/resource2/a/b%2Fc/', handler)
app.middlewares.extend(extra_middlewares)
return aiohttp_client(app, server_kwargs={'skip_url_asserts': True})
return wrapper
class TestNormalizePathMiddleware:
@pytest.mark.parametrize("path, status", [
('/resource1', 200),
('/resource1/', 404),
('/resource2', 200),
('/resource2/', 200),
('/resource1?p1=1&p2=2', 200),
('/resource1/?p1=1&p2=2', 404),
('/resource2?p1=1&p2=2', 200),
('/resource2/?p1=1&p2=2', 200),
('/resource2/a/b%2Fc', 200),
('/resource2/a/b%2Fc/', 200)
])
async def test_add_trailing_when_necessary(
self, path, status, cli):
extra_middlewares = [
web.normalize_path_middleware(merge_slashes=False)]
client = await cli(extra_middlewares)
resp = await client.get(path)
assert resp.status == status
@pytest.mark.parametrize("path, status", [
('/resource1', 200),
('/resource1/', 200),
('/resource2', 404),
('/resource2/', 200),
('/resource1?p1=1&p2=2', 200),
('/resource1/?p1=1&p2=2', 200),
('/resource2?p1=1&p2=2', 404),
('/resource2/?p1=1&p2=2', 200),
('/resource2/a/b%2Fc', 404),
('/resource2/a/b%2Fc/', 200)
])
async def test_remove_trailing_when_necessary(self, path, status, cli):
extra_middlewares = [
web.normalize_path_middleware(
append_slash=False, remove_slash=True, merge_slashes=False)]
client = await cli(extra_middlewares)
resp = await client.get(path)
assert resp.status == status
@pytest.mark.parametrize("path, status", [
('/resource1', 200),
('/resource1/', 404),
('/resource2', 404),
('/resource2/', 200),
('/resource1?p1=1&p2=2', 200),
('/resource1/?p1=1&p2=2', 404),
('/resource2?p1=1&p2=2', 404),
('/resource2/?p1=1&p2=2', 200),
('/resource2/a/b%2Fc', 404),
('/resource2/a/b%2Fc/', 200)
])
async def test_no_trailing_slash_when_disabled(
self, path, status, cli):
extra_middlewares = [
web.normalize_path_middleware(
append_slash=False, merge_slashes=False)]
client = await cli(extra_middlewares)
resp = await client.get(path)
assert resp.status == status
@pytest.mark.parametrize("path, status", [
('/resource1/a/b', 200),
('//resource1//a//b', 200),
('//resource1//a//b/', 404),
('///resource1//a//b', 200),
('/////resource1/a///b', 200),
('/////resource1/a//b/', 404),
('/resource1/a/b?p=1', 200),
('//resource1//a//b?p=1', 200),
('//resource1//a//b/?p=1', 404),
('///resource1//a//b?p=1', 200),
('/////resource1/a///b?p=1', 200),
('/////resource1/a//b/?p=1', 404),
])
async def test_merge_slash(self, path, status, cli):
extra_middlewares = [
web.normalize_path_middleware(append_slash=False)]
client = await cli(extra_middlewares)
resp = await client.get(path)
assert resp.status == status
@pytest.mark.parametrize("path, status", [
('/resource1/a/b', 200),
('/resource1/a/b/', 404),
('//resource2//a//b', 200),
('//resource2//a//b/', 200),
('///resource1//a//b', 200),
('///resource1//a//b/', 404),
('/////resource1/a///b', 200),
('/////resource1/a///b/', 404),
('/resource2/a/b', 200),
('//resource2//a//b', 200),
('//resource2//a//b/', 200),
('///resource2//a//b', 200),
('///resource2//a//b/', 200),
('/////resource2/a///b', 200),
('/////resource2/a///b/', 200),
('/resource1/a/b?p=1', 200),
('/resource1/a/b/?p=1', 404),
('//resource2//a//b?p=1', 200),
('//resource2//a//b/?p=1', 200),
('///resource1//a//b?p=1', 200),
('///resource1//a//b/?p=1', 404),
('/////resource1/a///b?p=1', 200),
('/////resource1/a///b/?p=1', 404),
('/resource2/a/b?p=1', 200),
('//resource2//a//b?p=1', 200),
('//resource2//a//b/?p=1', 200),
('///resource2//a//b?p=1', 200),
('///resource2//a//b/?p=1', 200),
('/////resource2/a///b?p=1', 200),
('/////resource2/a///b/?p=1', 200)
])
async def test_append_and_merge_slash(self, path, status, cli):
extra_middlewares = [
web.normalize_path_middleware()]
client = await cli(extra_middlewares)
resp = await client.get(path)
assert resp.status == status
@pytest.mark.parametrize("path, status", [
('/resource1/a/b', 200),
('/resource1/a/b/', 200),
('//resource2//a//b', 404),
('//resource2//a//b/', 200),
('///resource1//a//b', 200),
('///resource1//a//b/', 200),
('/////resource1/a///b', 200),
('/////resource1/a///b/', 200),
('/////resource1/a///b///', 200),
('/resource2/a/b', 404),
('//resource2//a//b', 404),
('//resource2//a//b/', 200),
('///resource2//a//b', 404),
('///resource2//a//b/', 200),
('/////resource2/a///b', 404),
('/////resource2/a///b/', 200),
('/resource1/a/b?p=1', 200),
('/resource1/a/b/?p=1', 200),
('//resource2//a//b?p=1', 404),
('//resource2//a//b/?p=1', 200),
('///resource1//a//b?p=1', 200),
('///resource1//a//b/?p=1', 200),
('/////resource1/a///b?p=1', 200),
('/////resource1/a///b/?p=1', 200),
('/resource2/a/b?p=1', 404),
('//resource2//a//b?p=1', 404),
('//resource2//a//b/?p=1', 200),
('///resource2//a//b?p=1', 404),
('///resource2//a//b/?p=1', 200),
('/////resource2/a///b?p=1', 404),
('/////resource2/a///b/?p=1', 200)
])
async def test_remove_and_merge_slash(self, path, status, cli):
extra_middlewares = [
web.normalize_path_middleware(
append_slash=False, remove_slash=True)]
client = await cli(extra_middlewares)
resp = await client.get(path)
assert resp.status == status
async def test_cannot_remove_and_add_slash(self):
with pytest.raises(AssertionError):
web.normalize_path_middleware(append_slash=True, remove_slash=True)
async def test_old_style_middleware(loop, aiohttp_client):
async def handler(request):
return web.Response(body=b'OK')
async def middleware_factory(app, handler):
async def middleware(request):
resp = await handler(request)
assert 200 == resp.status
resp.set_status(201)
resp.text = resp.text + '[old style middleware]'
return resp
return middleware
with pytest.warns(DeprecationWarning) as warning_checker:
app = web.Application()
app.middlewares.append(middleware_factory)
app.router.add_route('GET', '/', handler)
client = await aiohttp_client(app)
resp = await client.get('/')
assert 201 == resp.status
txt = await resp.text()
assert 'OK[old style middleware]' == txt
assert len(warning_checker) == 1
msg = str(warning_checker.list[0].message)
assert re.match('^old-style middleware '
'"<function test_old_style_middleware.<locals>.'
'middleware_factory at 0x[0-9a-fA-F]+>" '
'deprecated, see #2252$',
msg)
async def test_mixed_middleware(loop, aiohttp_client):
async def handler(request):
return web.Response(body=b'OK')
async def m_old1(app, handler):
async def middleware(request):
resp = await handler(request)
resp.text += '[old style 1]'
return resp
return middleware
@web.middleware
async def m_new1(request, handler):
resp = await handler(request)
resp.text += '[new style 1]'
return resp
async def m_old2(app, handler):
async def middleware(request):
resp = await handler(request)
resp.text += '[old style 2]'
return resp
return middleware
@web.middleware
async def m_new2(request, handler):
resp = await handler(request)
resp.text += '[new style 2]'
return resp
middlewares = m_old1, m_new1, m_old2, m_new2
with pytest.warns(DeprecationWarning) as w:
app = web.Application(middlewares=middlewares)
app.router.add_route('GET', '/', handler)
client = await aiohttp_client(app)
resp = await client.get('/')
assert 200 == resp.status
txt = await resp.text()
assert 'OK[new style 2][old style 2][new style 1][old style 1]' == txt
assert len(w) == 2
tmpl = ('^old-style middleware '
'"<function test_mixed_middleware.<locals>.'
'{} at 0x[0-9a-fA-F]+>" '
'deprecated, see #2252$')
p1 = tmpl.format('m_old1')
p2 = tmpl.format('m_old2')
assert re.match(p2, str(w.list[0].message))
assert re.match(p1, str(w.list[1].message))
async def test_old_style_middleware_class(loop, aiohttp_client):
async def handler(request):
return web.Response(body=b'OK')
class Middleware:
async def __call__(self, app, handler):
async def middleware(request):
resp = await handler(request)
assert 200 == resp.status
resp.set_status(201)
resp.text = resp.text + '[old style middleware]'
return resp
return middleware
with pytest.warns(DeprecationWarning) as warning_checker:
app = web.Application()
app.middlewares.append(Middleware())
app.router.add_route('GET', '/', handler)
client = await aiohttp_client(app)
resp = await client.get('/')
assert 201 == resp.status
txt = await resp.text()
assert 'OK[old style middleware]' == txt
assert len(warning_checker) == 1
msg = str(warning_checker.list[0].message)
assert re.match('^old-style middleware '
'"<test_web_middleware.test_old_style_middleware_class.'
'<locals>.Middleware object '
'at 0x[0-9a-fA-F]+>" deprecated, see #2252$', msg)
async def test_new_style_middleware_class(loop, aiohttp_client):
async def handler(request):
return web.Response(body=b'OK')
@web.middleware
class Middleware:
async def __call__(self, request, handler):
resp = await handler(request)
assert 200 == resp.status
resp.set_status(201)
resp.text = resp.text + '[new style middleware]'
return resp
with pytest.warns(None) as warning_checker:
app = web.Application()
app.middlewares.append(Middleware())
app.router.add_route('GET', '/', handler)
client = await aiohttp_client(app)
resp = await client.get('/')
assert 201 == resp.status
txt = await resp.text()
assert 'OK[new style middleware]' == txt
assert len(warning_checker) == 0
async def test_new_style_middleware_method(loop, aiohttp_client):
async def handler(request):
return web.Response(body=b'OK')
class Middleware:
@web.middleware
async def call(self, request, handler):
resp = await handler(request)
assert 200 == resp.status
resp.set_status(201)
resp.text = resp.text + '[new style middleware]'
return resp
with pytest.warns(None) as warning_checker:
app = web.Application()
app.middlewares.append(Middleware().call)
app.router.add_route('GET', '/', handler)
client = await aiohttp_client(app)
resp = await client.get('/')
assert 201 == resp.status
txt = await resp.text()
assert 'OK[new style middleware]' == txt
assert len(warning_checker) == 0