test_http.py

import asyncio
import contextlib
import logging
import socket
import threading
import time

import pytest

from tests.response import Response
from uvicorn import Server
from uvicorn.config import Config
from uvicorn.main import ServerState
from uvicorn.protocols.http.h11_impl import H11Protocol

try:
    from uvicorn.protocols.http.httptools_impl import HttpToolsProtocol
except ImportError:  # pragma: nocover
    HttpToolsProtocol = None


HTTP_PROTOCOLS = [p for p in [H11Protocol, HttpToolsProtocol] if p is not None]

SIMPLE_GET_REQUEST = b"\r\n".join([b"GET / HTTP/1.1", b"Host: example.org", b"", b""])

SIMPLE_HEAD_REQUEST = b"\r\n".join([b"HEAD / HTTP/1.1", b"Host: example.org", b"", b""])

SIMPLE_POST_REQUEST = b"\r\n".join(
    [
        b"POST / HTTP/1.1",
        b"Host: example.org",
        b"Content-Type: application/json",
        b"Content-Length: 18",
        b"",
        b'{"hello": "world"}',
    ]
)

LARGE_POST_REQUEST = b"\r\n".join(
    [
        b"POST / HTTP/1.1",
        b"Host: example.org",
        b"Content-Type: text/plain",
        b"Content-Length: 100000",
        b"",
        b"x" * 100000,
    ]
)

START_POST_REQUEST = b"\r\n".join(
    [
        b"POST / HTTP/1.1",
        b"Host: example.org",
        b"Content-Type: application/json",
        b"Content-Length: 18",
        b"",
        b"",
    ]
)

FINISH_POST_REQUEST = b'{"hello": "world"}'

HTTP10_GET_REQUEST = b"\r\n".join([b"GET / HTTP/1.0", b"Host: example.org", b"", b""])

GET_REQUEST_WITH_RAW_PATH = b"\r\n".join(
    [b"GET /one%2Ftwo HTTP/1.1", b"Host: example.org", b"", b""]
)

UPGRADE_REQUEST = b"\r\n".join(
    [
        b"GET / HTTP/1.1",
        b"Host: example.org",
        b"Connection: upgrade",
        b"Upgrade: websocket",
        b"Sec-WebSocket-Version: 11",
        b"",
        b"",
    ]
)

INVALID_REQUEST_TEMPLATE = b"\r\n".join(
    [
        b"%s",
        b"Host: example.org",
        b"",
        b"",
    ]
)

GET_REQUEST_HUGE_HEADERS = [
    b"".join(
        [
            b"GET / HTTP/1.1\r\n",
            b"Host: example.org\r\n",
            b"Cookie: " + b"x" * 32 * 1024,
        ]
    ),
    b"".join([b"x" * 32 * 1024 + b"\r\n", b"\r\n", b"\r\n"]),
]


class MockTransport:
    def __init__(self, sockname=None, peername=None, sslcontext=False):
        self.sockname = ("127.0.0.1", 8000) if sockname is None else sockname
        self.peername = ("127.0.0.1", 8001) if peername is None else peername
        self.sslcontext = sslcontext
        self.closed = False
        self.buffer = b""
        self.read_paused = False

    def get_extra_info(self, key):
        return {
            "sockname": self.sockname,
            "peername": self.peername,
            "sslcontext": self.sslcontext,
        }.get(key)

    def write(self, data):
        assert not self.closed
        self.buffer += data

    def close(self):
        assert not self.closed
        self.closed = True

    def pause_reading(self):
        self.read_paused = True

    def resume_reading(self):
        self.read_paused = False

    def is_closing(self):
        return self.closed

    def clear_buffer(self):
        self.buffer = b""

    def set_protocol(self, protocol):
        pass


class MockLoop(asyncio.AbstractEventLoop):
    def __init__(self, event_loop):
        self.tasks = []
        self.later = []
        self.loop = event_loop

    def is_running(self):
        return True  # pragma: no cover

    def create_task(self, coroutine):
        self.tasks.insert(0, coroutine)
        return MockTask()

    def call_later(self, delay, callback, *args):
        self.later.insert(0, (delay, callback, args))

    def run_one(self):
        coroutine = self.tasks.pop()
        self.run_until_complete(coroutine)

    def run_until_complete(self, coroutine):
        asyncio._set_running_loop(None)
        try:
            return self.loop.run_until_complete(coroutine)
        finally:
            asyncio._set_running_loop(self)

    def close(self):
        self.loop.close()

    def run_later(self, with_delay):
        later = []
        for delay, callback, args in self.later:
            if with_delay >= delay:
                callback(*args)
            else:
                later.append((delay, callback, args))
        self.later = later


class MockTask:
    def add_done_callback(self, callback):
        pass


@contextlib.contextmanager
def get_connected_protocol(app, protocol_cls, event_loop, **kwargs):
    loop = MockLoop(event_loop)
    asyncio._set_running_loop(loop)
    transport = MockTransport()
    config = Config(app=app, **kwargs)
    server_state = ServerState()
    protocol = protocol_cls(config=config, server_state=server_state, _loop=loop)
    protocol.connection_made(transport)
    try:
        yield protocol
    finally:
        protocol.loop.close()
        asyncio._set_running_loop(None)


@pytest.mark.parametrize("protocol_cls", HTTP_PROTOCOLS)
def test_get_request(protocol_cls, event_loop):
    app = Response("Hello, world", media_type="text/plain")

    with get_connected_protocol(app, protocol_cls, event_loop) as protocol:
        protocol.data_received(SIMPLE_GET_REQUEST)
        protocol.loop.run_one()
        assert b"HTTP/1.1 200 OK" in protocol.transport.buffer
        assert b"Hello, world" in protocol.transport.buffer


@pytest.mark.parametrize("path", ["/", "/?foo", "/?foo=bar", "/?foo=bar&baz=1"])
@pytest.mark.parametrize("protocol_cls", HTTP_PROTOCOLS)
def test_request_logging(path, protocol_cls, caplog, event_loop):
    get_request_with_query_string = b"\r\n".join(
        ["GET {} HTTP/1.1".format(path).encode("ascii"), b"Host: example.org", b"", b""]
    )
    caplog.set_level(logging.INFO, logger="uvicorn.access")
    logging.getLogger("uvicorn.access").propagate = True

    app = Response("Hello, world", media_type="text/plain")

    with get_connected_protocol(
        app, protocol_cls, event_loop, log_config=None
    ) as protocol:
        protocol.data_received(get_request_with_query_string)
        protocol.loop.run_one()
        assert '"GET {} HTTP/1.1" 200'.format(path) in caplog.records[0].message


@pytest.mark.parametrize("protocol_cls", HTTP_PROTOCOLS)
def test_head_request(protocol_cls, event_loop):
    app = Response("Hello, world", media_type="text/plain")

    with get_connected_protocol(app, protocol_cls, event_loop) as protocol:
        protocol.data_received(SIMPLE_HEAD_REQUEST)
        protocol.loop.run_one()
        assert b"HTTP/1.1 200 OK" in protocol.transport.buffer
        assert b"Hello, world" not in protocol.transport.buffer


@pytest.mark.parametrize("protocol_cls", HTTP_PROTOCOLS)
def test_post_request(protocol_cls, event_loop):
    async def app(scope, receive, send):
        body = b""
        more_body = True
        while more_body:
            message = await receive()
            body += message.get("body", b"")
            more_body = message.get("more_body", False)
        response = Response(b"Body: " + body, media_type="text/plain")
        await response(scope, receive, send)

    with get_connected_protocol(app, protocol_cls, event_loop) as protocol:
        protocol.data_received(SIMPLE_POST_REQUEST)
        protocol.loop.run_one()
        assert b"HTTP/1.1 200 OK" in protocol.transport.buffer
        assert b'Body: {"hello": "world"}' in protocol.transport.buffer


@pytest.mark.parametrize("protocol_cls", HTTP_PROTOCOLS)
def test_keepalive(protocol_cls, event_loop):
    app = Response(b"", status_code=204)

    with get_connected_protocol(app, protocol_cls, event_loop) as protocol:
        protocol.data_received(SIMPLE_GET_REQUEST)
        protocol.loop.run_one()

        assert b"HTTP/1.1 204 No Content" in protocol.transport.buffer
        assert not protocol.transport.is_closing()


@pytest.mark.parametrize("protocol_cls", HTTP_PROTOCOLS)
def test_keepalive_timeout(protocol_cls, event_loop):
    app = Response(b"", status_code=204)

    with get_connected_protocol(app, protocol_cls, event_loop) as protocol:
        protocol.data_received(SIMPLE_GET_REQUEST)
        protocol.loop.run_one()
        assert b"HTTP/1.1 204 No Content" in protocol.transport.buffer
        assert not protocol.transport.is_closing()
        protocol.loop.run_later(with_delay=1)
        assert not protocol.transport.is_closing()
        protocol.loop.run_later(with_delay=5)
        assert protocol.transport.is_closing()


@pytest.mark.parametrize("protocol_cls", HTTP_PROTOCOLS)
def test_close(protocol_cls, event_loop):
    app = Response(b"", status_code=204, headers={"connection": "close"})

    with get_connected_protocol(app, protocol_cls, event_loop) as protocol:
        protocol.data_received(SIMPLE_GET_REQUEST)
        protocol.loop.run_one()
        assert b"HTTP/1.1 204 No Content" in protocol.transport.buffer
        assert protocol.transport.is_closing()


@pytest.mark.parametrize("protocol_cls", HTTP_PROTOCOLS)
def test_chunked_encoding(protocol_cls, event_loop):
    app = Response(
        b"Hello, world!", status_code=200, headers={"transfer-encoding": "chunked"}
    )

    with get_connected_protocol(app, protocol_cls, event_loop) as protocol:
        protocol.data_received(SIMPLE_GET_REQUEST)
        protocol.loop.run_one()
        assert b"HTTP/1.1 200 OK" in protocol.transport.buffer
        assert b"0\r\n\r\n" in protocol.transport.buffer
        assert not protocol.transport.is_closing()


@pytest.mark.parametrize("protocol_cls", HTTP_PROTOCOLS)
def test_chunked_encoding_empty_body(protocol_cls, event_loop):
    app = Response(
        b"Hello, world!", status_code=200, headers={"transfer-encoding": "chunked"}
    )

    with get_connected_protocol(app, protocol_cls, event_loop) as protocol:
        protocol.data_received(SIMPLE_GET_REQUEST)
        protocol.loop.run_one()
        assert b"HTTP/1.1 200 OK" in protocol.transport.buffer
        assert protocol.transport.buffer.count(b"0\r\n\r\n") == 1
        assert not protocol.transport.is_closing()


@pytest.mark.parametrize("protocol_cls", HTTP_PROTOCOLS)
def test_chunked_encoding_head_request(protocol_cls, event_loop):
    app = Response(
        b"Hello, world!", status_code=200, headers={"transfer-encoding": "chunked"}
    )

    with get_connected_protocol(app, protocol_cls, event_loop) as protocol:
        protocol.data_received(SIMPLE_HEAD_REQUEST)
        protocol.loop.run_one()
        assert b"HTTP/1.1 200 OK" in protocol.transport.buffer
        assert not protocol.transport.is_closing()


@pytest.mark.parametrize("protocol_cls", HTTP_PROTOCOLS)
def test_pipelined_requests(protocol_cls, event_loop):
    app = Response("Hello, world", media_type="text/plain")

    with get_connected_protocol(app, protocol_cls, event_loop) as protocol:
        protocol.data_received(SIMPLE_GET_REQUEST)
        protocol.data_received(SIMPLE_GET_REQUEST)
        protocol.data_received(SIMPLE_GET_REQUEST)
        protocol.loop.run_one()
        assert b"HTTP/1.1 200 OK" in protocol.transport.buffer
        assert b"Hello, world" in protocol.transport.buffer
        protocol.transport.clear_buffer()
        protocol.loop.run_one()
        assert b"HTTP/1.1 200 OK" in protocol.transport.buffer
        assert b"Hello, world" in protocol.transport.buffer
        protocol.transport.clear_buffer()
        protocol.loop.run_one()
        assert b"HTTP/1.1 200 OK" in protocol.transport.buffer
        assert b"Hello, world" in protocol.transport.buffer
        protocol.transport.clear_buffer()


@pytest.mark.parametrize("protocol_cls", HTTP_PROTOCOLS)
def test_undersized_request(protocol_cls, event_loop):
    app = Response(b"xxx", headers={"content-length": "10"})

    with get_connected_protocol(app, protocol_cls, event_loop) as protocol:
        protocol.data_received(SIMPLE_GET_REQUEST)
        protocol.loop.run_one()
        assert protocol.transport.is_closing()


@pytest.mark.parametrize("protocol_cls", HTTP_PROTOCOLS)
def test_oversized_request(protocol_cls, event_loop):
    app = Response(b"xxx" * 20, headers={"content-length": "10"})

    with get_connected_protocol(app, protocol_cls, event_loop) as protocol:
        protocol.data_received(SIMPLE_GET_REQUEST)
        protocol.loop.run_one()
        assert protocol.transport.is_closing()


@pytest.mark.parametrize("protocol_cls", HTTP_PROTOCOLS)
def test_large_post_request(protocol_cls, event_loop):
    app = Response("Hello, world", media_type="text/plain")

    with get_connected_protocol(app, protocol_cls, event_loop) as protocol:
        protocol.data_received(LARGE_POST_REQUEST)
        assert protocol.transport.read_paused
        protocol.loop.run_one()
        assert not protocol.transport.read_paused


@pytest.mark.parametrize("protocol_cls", HTTP_PROTOCOLS)
def test_invalid_http(protocol_cls, event_loop):
    app = Response("Hello, world", media_type="text/plain")

    with get_connected_protocol(app, protocol_cls, event_loop) as protocol:
        protocol.data_received(b"x" * 100000)
        assert protocol.transport.is_closing()


@pytest.mark.parametrize("protocol_cls", HTTP_PROTOCOLS)
def test_app_exception(protocol_cls, event_loop):
    async def app(scope, receive, send):
        raise Exception()

    with get_connected_protocol(app, protocol_cls, event_loop) as protocol:
        protocol.data_received(SIMPLE_GET_REQUEST)
        protocol.loop.run_one()
        assert b"HTTP/1.1 500 Internal Server Error" in protocol.transport.buffer
        assert protocol.transport.is_closing()


@pytest.mark.parametrize("protocol_cls", HTTP_PROTOCOLS)
def test_exception_during_response(protocol_cls, event_loop):
    async def app(scope, receive, send):
        await send({"type": "http.response.start", "status": 200})
        await send({"type": "http.response.body", "body": b"1", "more_body": True})
        raise Exception()

    with get_connected_protocol(app, protocol_cls, event_loop) as protocol:
        protocol.data_received(SIMPLE_GET_REQUEST)
        protocol.loop.run_one()
        assert b"HTTP/1.1 500 Internal Server Error" not in protocol.transport.buffer
        assert protocol.transport.is_closing()


@pytest.mark.parametrize("protocol_cls", HTTP_PROTOCOLS)
def test_no_response_returned(protocol_cls, event_loop):
    async def app(scope, receive, send):
        pass

    with get_connected_protocol(app, protocol_cls, event_loop) as protocol:
        protocol.data_received(SIMPLE_GET_REQUEST)
        protocol.loop.run_one()
        assert b"HTTP/1.1 500 Internal Server Error" in protocol.transport.buffer
        assert protocol.transport.is_closing()


@pytest.mark.parametrize("protocol_cls", HTTP_PROTOCOLS)
def test_partial_response_returned(protocol_cls, event_loop):
    async def app(scope, receive, send):
        await send({"type": "http.response.start", "status": 200})

    with get_connected_protocol(app, protocol_cls, event_loop) as protocol:
        protocol.data_received(SIMPLE_GET_REQUEST)
        protocol.loop.run_one()
        assert b"HTTP/1.1 500 Internal Server Error" not in protocol.transport.buffer
        assert protocol.transport.is_closing()


@pytest.mark.parametrize("protocol_cls", HTTP_PROTOCOLS)
def test_duplicate_start_message(protocol_cls, event_loop):
    async def app(scope, receive, send):
        await send({"type": "http.response.start", "status": 200})
        await send({"type": "http.response.start", "status": 200})

    with get_connected_protocol(app, protocol_cls, event_loop) as protocol:
        protocol.data_received(SIMPLE_GET_REQUEST)
        protocol.loop.run_one()
        assert b"HTTP/1.1 500 Internal Server Error" not in protocol.transport.buffer
        assert protocol.transport.is_closing()


@pytest.mark.parametrize("protocol_cls", HTTP_PROTOCOLS)
def test_missing_start_message(protocol_cls, event_loop):
    async def app(scope, receive, send):
        await send({"type": "http.response.body", "body": b""})

    with get_connected_protocol(app, protocol_cls, event_loop) as protocol:
        protocol.data_received(SIMPLE_GET_REQUEST)
        protocol.loop.run_one()
        assert b"HTTP/1.1 500 Internal Server Error" in protocol.transport.buffer
        assert protocol.transport.is_closing()


@pytest.mark.parametrize("protocol_cls", HTTP_PROTOCOLS)
def test_message_after_body_complete(protocol_cls, event_loop):
    async def app(scope, receive, send):
        await send({"type": "http.response.start", "status": 200})
        await send({"type": "http.response.body", "body": b""})
        await send({"type": "http.response.body", "body": b""})

    with get_connected_protocol(app, protocol_cls, event_loop) as protocol:
        protocol.data_received(SIMPLE_GET_REQUEST)
        protocol.loop.run_one()
        assert b"HTTP/1.1 200 OK" in protocol.transport.buffer
        assert protocol.transport.is_closing()


@pytest.mark.parametrize("protocol_cls", HTTP_PROTOCOLS)
def test_value_returned(protocol_cls, event_loop):
    async def app(scope, receive, send):
        await send({"type": "http.response.start", "status": 200})
        await send({"type": "http.response.body", "body": b""})
        return 123

    with get_connected_protocol(app, protocol_cls, event_loop) as protocol:
        protocol.data_received(SIMPLE_GET_REQUEST)
        protocol.loop.run_one()
        assert b"HTTP/1.1 200 OK" in protocol.transport.buffer
        assert protocol.transport.is_closing()


@pytest.mark.parametrize("protocol_cls", HTTP_PROTOCOLS)
def test_early_disconnect(protocol_cls, event_loop):
    got_disconnect_event = False

    async def app(scope, receive, send):
        nonlocal got_disconnect_event

        while True:
            message = await receive()
            if message["type"] == "http.disconnect":
                break

        got_disconnect_event = True

    with get_connected_protocol(app, protocol_cls, event_loop) as protocol:
        protocol.data_received(SIMPLE_POST_REQUEST)
        protocol.eof_received()
        protocol.connection_lost(None)
        protocol.loop.run_one()
        assert got_disconnect_event


@pytest.mark.parametrize("protocol_cls", HTTP_PROTOCOLS)
def test_early_response(protocol_cls, event_loop):
    app = Response("Hello, world", media_type="text/plain")

    with get_connected_protocol(app, protocol_cls, event_loop) as protocol:
        protocol.data_received(START_POST_REQUEST)
        protocol.loop.run_one()
        assert b"HTTP/1.1 200 OK" in protocol.transport.buffer
        protocol.data_received(FINISH_POST_REQUEST)
        assert not protocol.transport.is_closing()


@pytest.mark.parametrize("protocol_cls", HTTP_PROTOCOLS)
def test_read_after_response(protocol_cls, event_loop):
    message_after_response = None

    async def app(scope, receive, send):
        nonlocal message_after_response

        response = Response("Hello, world", media_type="text/plain")
        await response(scope, receive, send)
        message_after_response = await receive()

    with get_connected_protocol(app, protocol_cls, event_loop) as protocol:
        protocol.data_received(SIMPLE_POST_REQUEST)
        protocol.loop.run_one()
        assert b"HTTP/1.1 200 OK" in protocol.transport.buffer
        assert message_after_response == {"type": "http.disconnect"}


@pytest.mark.parametrize("protocol_cls", HTTP_PROTOCOLS)
def test_http10_request(protocol_cls, event_loop):
    async def app(scope, receive, send):
        content = "Version: %s" % scope["http_version"]
        response = Response(content, media_type="text/plain")
        await response(scope, receive, send)

    with get_connected_protocol(app, protocol_cls, event_loop) as protocol:
        protocol.data_received(HTTP10_GET_REQUEST)
        protocol.loop.run_one()
        assert b"HTTP/1.1 200 OK" in protocol.transport.buffer
        assert b"Version: 1.0" in protocol.transport.buffer


@pytest.mark.parametrize("protocol_cls", HTTP_PROTOCOLS)
def test_root_path(protocol_cls, event_loop):
    async def app(scope, receive, send):
        path = scope.get("root_path", "") + scope["path"]
        response = Response("Path: " + path, media_type="text/plain")
        await response(scope, receive, send)

    with get_connected_protocol(
        app, protocol_cls, event_loop, root_path="/app"
    ) as protocol:
        protocol.data_received(SIMPLE_GET_REQUEST)
        protocol.loop.run_one()
        assert b"HTTP/1.1 200 OK" in protocol.transport.buffer
        assert b"Path: /app/" in protocol.transport.buffer


@pytest.mark.parametrize("protocol_cls", HTTP_PROTOCOLS)
def test_raw_path(protocol_cls, event_loop):
    async def app(scope, receive, send):
        path = scope["path"]
        raw_path = scope.get("raw_path", None)
        assert "/one/two" == path
        assert b"/one%2Ftwo" == raw_path

        response = Response("Done", media_type="text/plain")
        await response(scope, receive, send)

    with get_connected_protocol(
        app, protocol_cls, event_loop, root_path="/app"
    ) as protocol:
        protocol.data_received(GET_REQUEST_WITH_RAW_PATH)
        protocol.loop.run_one()
        assert b"Done" in protocol.transport.buffer


@pytest.mark.parametrize("protocol_cls", HTTP_PROTOCOLS)
def test_max_concurrency(protocol_cls, event_loop):
    app = Response("Hello, world", media_type="text/plain")

    with get_connected_protocol(
        app, protocol_cls, event_loop, limit_concurrency=1
    ) as protocol:
        protocol.data_received(SIMPLE_GET_REQUEST)
        protocol.loop.run_one()
        assert b"HTTP/1.1 503 Service Unavailable" in protocol.transport.buffer


@pytest.mark.parametrize("protocol_cls", HTTP_PROTOCOLS)
def test_shutdown_during_request(protocol_cls, event_loop):
    app = Response(b"", status_code=204)

    with get_connected_protocol(app, protocol_cls, event_loop) as protocol:
        protocol.data_received(SIMPLE_GET_REQUEST)
        protocol.shutdown()
        protocol.loop.run_one()
        assert b"HTTP/1.1 204 No Content" in protocol.transport.buffer
        assert protocol.transport.is_closing()


@pytest.mark.parametrize("protocol_cls", HTTP_PROTOCOLS)
def test_shutdown_during_idle(protocol_cls, event_loop):
    app = Response("Hello, world", media_type="text/plain")

    with get_connected_protocol(app, protocol_cls, event_loop) as protocol:
        protocol.shutdown()
        assert protocol.transport.buffer == b""
        assert protocol.transport.is_closing()


@pytest.mark.parametrize("protocol_cls", HTTP_PROTOCOLS)
def test_100_continue_sent_when_body_consumed(protocol_cls, event_loop):
    async def app(scope, receive, send):
        body = b""
        more_body = True
        while more_body:
            message = await receive()
            body += message.get("body", b"")
            more_body = message.get("more_body", False)
        response = Response(b"Body: " + body, media_type="text/plain")
        await response(scope, receive, send)

    with get_connected_protocol(app, protocol_cls, event_loop) as protocol:
        EXPECT_100_REQUEST = b"\r\n".join(
            [
                b"POST / HTTP/1.1",
                b"Host: example.org",
                b"Expect: 100-continue",
                b"Content-Type: application/json",
                b"Content-Length: 18",
                b"",
                b'{"hello": "world"}',
            ]
        )
        protocol.data_received(EXPECT_100_REQUEST)
        protocol.loop.run_one()
        assert b"HTTP/1.1 100 Continue" in protocol.transport.buffer
        assert b"HTTP/1.1 200 OK" in protocol.transport.buffer
        assert b'Body: {"hello": "world"}' in protocol.transport.buffer


@pytest.mark.parametrize("protocol_cls", HTTP_PROTOCOLS)
def test_100_continue_not_sent_when_body_not_consumed(protocol_cls, event_loop):
    app = Response(b"", status_code=204)

    with get_connected_protocol(app, protocol_cls, event_loop) as protocol:
        EXPECT_100_REQUEST = b"\r\n".join(
            [
                b"POST / HTTP/1.1",
                b"Host: example.org",
                b"Expect: 100-continue",
                b"Content-Type: application/json",
                b"Content-Length: 18",
                b"",
                b'{"hello": "world"}',
            ]
        )
        protocol.data_received(EXPECT_100_REQUEST)
        protocol.loop.run_one()
        assert b"HTTP/1.1 100 Continue" not in protocol.transport.buffer
        assert b"HTTP/1.1 204 No Content" in protocol.transport.buffer


@pytest.mark.parametrize("protocol_cls", HTTP_PROTOCOLS)
def test_unsupported_upgrade_request(protocol_cls, event_loop):
    app = Response("Hello, world", media_type="text/plain")

    with get_connected_protocol(app, protocol_cls, event_loop, ws="none") as protocol:
        protocol.data_received(UPGRADE_REQUEST)
        assert b"HTTP/1.1 400 Bad Request" in protocol.transport.buffer
        assert b"Unsupported upgrade request." in protocol.transport.buffer


@pytest.mark.parametrize("protocol_cls", HTTP_PROTOCOLS)
def test_supported_upgrade_request(protocol_cls, event_loop):
    app = Response("Hello, world", media_type="text/plain")

    with get_connected_protocol(
        app, protocol_cls, event_loop, ws="wsproto"
    ) as protocol:
        protocol.data_received(UPGRADE_REQUEST)
        assert b"HTTP/1.1 426 " in protocol.transport.buffer


async def asgi3app(scope, receive, send):
    pass


def asgi2app(scope):
    async def asgi(receive, send):
        pass

    return asgi


asgi_scope_data = [
    (asgi3app, {"version": "3.0", "spec_version": "2.3"}),
    (asgi2app, {"version": "2.0", "spec_version": "2.3"}),
]


@pytest.mark.parametrize("asgi2or3_app, expected_scopes", asgi_scope_data)
@pytest.mark.parametrize("protocol_cls", HTTP_PROTOCOLS)
def test_scopes(asgi2or3_app, expected_scopes, protocol_cls, event_loop):
    with get_connected_protocol(asgi2or3_app, protocol_cls, event_loop) as protocol:
        protocol.data_received(SIMPLE_GET_REQUEST)
        protocol.loop.run_one()
        assert expected_scopes == protocol.scope.get("asgi")


@pytest.mark.parametrize(
    "request_line",
    [
        pytest.param(b"G?T / HTTP/1.1", id="invalid-method"),
        pytest.param(b"GET /?x=y z HTTP/1.1", id="invalid-path"),
        pytest.param(b"GET / HTTP1.1", id="invalid-http-version"),
    ],
)
@pytest.mark.parametrize("protocol_cls", HTTP_PROTOCOLS)
def test_invalid_http_request(request_line, protocol_cls, caplog, event_loop):
    app = Response("Hello, world", media_type="text/plain")
    request = INVALID_REQUEST_TEMPLATE % request_line

    caplog.set_level(logging.INFO, logger="uvicorn.error")
    logging.getLogger("uvicorn.error").propagate = True

    with get_connected_protocol(app, protocol_cls, event_loop) as protocol:
        protocol.data_received(request)
        assert b"HTTP/1.1 400 Bad Request" in protocol.transport.buffer
        assert b"Invalid HTTP request received." in protocol.transport.buffer


def test_fragmentation():
    def receive_all(sock):
        chunks = []
        while True:
            chunk = sock.recv(1024)
            if not chunk:
                break
            chunks.append(chunk)
        return b"".join(chunks)

    app = Response("Hello, world", media_type="text/plain")

    def send_fragmented_req(path):

        sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        sock.connect(("127.0.0.1", 8000))
        d = (
            f"GET {path} HTTP/1.1\r\n" "Host: localhost\r\n" "Connection: close\r\n\r\n"
        ).encode()
        split = len(path) // 2
        sock.sendall(d[:split])
        time.sleep(0.01)
        sock.sendall(d[split:])
        resp = receive_all(sock)
        # see https://github.com/kmonsoor/py-amqplib/issues/45
        # we skip the error on bsd systems if python is too slow
        try:
            sock.shutdown(socket.SHUT_RDWR)
        except Exception:  # pragma: no cover
            pass
        sock.close()
        return resp

    config = Config(app=app, http="httptools")
    server = Server(config=config)
    t = threading.Thread(target=server.run)
    t.daemon = True
    t.start()
    time.sleep(1)  # wait for uvicorn to start

    path = "/?param=" + "q" * 10
    response = send_fragmented_req(path)
    bad_response = b"HTTP/1.1 400 Bad Request"
    assert bad_response != response[: len(bad_response)]
    server.should_exit = True
    t.join()


@pytest.mark.parametrize("protocol_cls", HTTP_PROTOCOLS)
def test_huge_headers_h11_fail(protocol_cls, event_loop):
    app = Response("Hello, world", media_type="text/plain")

    with get_connected_protocol(app, protocol_cls, event_loop) as protocol:
        # Huge headers make h11 fail in it's default config
        # h11 sends back a 400 in this case
        if protocol_cls == H11Protocol:
            protocol.data_received(GET_REQUEST_HUGE_HEADERS[0])
            assert b"HTTP/1.1 400 Bad Request" in protocol.transport.buffer
            assert b"Connection: close" in protocol.transport.buffer
            assert b"Invalid HTTP request received." in protocol.transport.buffer
        else:
            protocol.data_received(GET_REQUEST_HUGE_HEADERS[0])
            protocol.data_received(GET_REQUEST_HUGE_HEADERS[1])
            protocol.loop.run_one()
            assert b"HTTP/1.1 200 OK" in protocol.transport.buffer
            assert b"Hello, world" in protocol.transport.buffer


@pytest.mark.parametrize("protocol_cls", HTTP_PROTOCOLS)
def test_huge_headers_h11_fail_with_setting(protocol_cls, event_loop):
    app = Response("Hello, world", media_type="text/plain")

    # a test to make sure that even when a value is set
    # a larger header will fail
    with get_connected_protocol(
        app, protocol_cls, event_loop, h11_max_incomplete_event_size=20 * 1024
    ) as protocol:
        if protocol_cls == H11Protocol:
            protocol.data_received(GET_REQUEST_HUGE_HEADERS[0])
            assert b"HTTP/1.1 400 Bad Request" in protocol.transport.buffer
            assert b"Connection: close" in protocol.transport.buffer
            assert b"Invalid HTTP request received." in protocol.transport.buffer
        else:
            protocol.data_received(GET_REQUEST_HUGE_HEADERS[0])
            protocol.data_received(GET_REQUEST_HUGE_HEADERS[1])
            protocol.loop.run_one()
            assert b"HTTP/1.1 200 OK" in protocol.transport.buffer
            assert b"Hello, world" in protocol.transport.buffer


@pytest.mark.parametrize("protocol_cls", HTTP_PROTOCOLS)
def test_huge_headers_h11_max_incomplete(protocol_cls, event_loop):
    app = Response("Hello, world", media_type="text/plain")

    with get_connected_protocol(
        app, protocol_cls, event_loop, h11_max_incomplete_event_size=64 * 1024
    ) as protocol:
        protocol.data_received(GET_REQUEST_HUGE_HEADERS[0])
        protocol.data_received(GET_REQUEST_HUGE_HEADERS[1])
        protocol.loop.run_one()
        assert b"HTTP/1.1 200 OK" in protocol.transport.buffer
        assert b"Hello, world" in protocol.transport.buffer