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Current File : /opt/imh-python/lib/python3.9/site-packages/tornado/test/simple_httpclient_test.py
import collections
from contextlib import closing
import errno
import gzip
import logging
import os
import re
import socket
import ssl
import sys
import typing  # noqa: F401

from tornado.escape import to_unicode, utf8
from tornado import gen
from tornado.httpclient import AsyncHTTPClient
from tornado.httputil import HTTPHeaders, ResponseStartLine
from tornado.ioloop import IOLoop
from tornado.iostream import UnsatisfiableReadError
from tornado.locks import Event
from tornado.log import gen_log
from tornado.netutil import Resolver, bind_sockets
from tornado.simple_httpclient import (
    SimpleAsyncHTTPClient,
    HTTPStreamClosedError,
    HTTPTimeoutError,
)
from tornado.test.httpclient_test import (
    ChunkHandler,
    CountdownHandler,
    HelloWorldHandler,
    RedirectHandler,
)
from tornado.test import httpclient_test
from tornado.testing import (
    AsyncHTTPTestCase,
    AsyncHTTPSTestCase,
    AsyncTestCase,
    ExpectLog,
    gen_test,
)
from tornado.test.util import skipOnTravis, skipIfNoIPv6, refusing_port
from tornado.web import RequestHandler, Application, url, stream_request_body


class SimpleHTTPClientCommonTestCase(httpclient_test.HTTPClientCommonTestCase):
    def get_http_client(self):
        client = SimpleAsyncHTTPClient(force_instance=True)
        self.assertTrue(isinstance(client, SimpleAsyncHTTPClient))
        return client


class TriggerHandler(RequestHandler):
    def initialize(self, queue, wake_callback):
        self.queue = queue
        self.wake_callback = wake_callback

    @gen.coroutine
    def get(self):
        logging.debug("queuing trigger")
        event = Event()
        self.queue.append(event.set)
        if self.get_argument("wake", "true") == "true":
            self.wake_callback()
        yield event.wait()


class ContentLengthHandler(RequestHandler):
    def get(self):
        self.stream = self.detach()
        IOLoop.current().spawn_callback(self.write_response)

    @gen.coroutine
    def write_response(self):
        yield self.stream.write(
            utf8(
                "HTTP/1.0 200 OK\r\nContent-Length: %s\r\n\r\nok"
                % self.get_argument("value")
            )
        )
        self.stream.close()


class HeadHandler(RequestHandler):
    def head(self):
        self.set_header("Content-Length", "7")


class OptionsHandler(RequestHandler):
    def options(self):
        self.set_header("Access-Control-Allow-Origin", "*")
        self.write("ok")


class NoContentHandler(RequestHandler):
    def get(self):
        self.set_status(204)
        self.finish()


class SeeOtherPostHandler(RequestHandler):
    def post(self):
        redirect_code = int(self.request.body)
        assert redirect_code in (302, 303), "unexpected body %r" % self.request.body
        self.set_header("Location", "/see_other_get")
        self.set_status(redirect_code)


class SeeOtherGetHandler(RequestHandler):
    def get(self):
        if self.request.body:
            raise Exception("unexpected body %r" % self.request.body)
        self.write("ok")


class HostEchoHandler(RequestHandler):
    def get(self):
        self.write(self.request.headers["Host"])


class NoContentLengthHandler(RequestHandler):
    def get(self):
        if self.request.version.startswith("HTTP/1"):
            # Emulate the old HTTP/1.0 behavior of returning a body with no
            # content-length.  Tornado handles content-length at the framework
            # level so we have to go around it.
            stream = self.detach()
            stream.write(b"HTTP/1.0 200 OK\r\n\r\n" b"hello")
            stream.close()
        else:
            self.finish("HTTP/1 required")


class EchoPostHandler(RequestHandler):
    def post(self):
        self.write(self.request.body)


@stream_request_body
class RespondInPrepareHandler(RequestHandler):
    def prepare(self):
        self.set_status(403)
        self.finish("forbidden")


class SimpleHTTPClientTestMixin(object):
    def get_app(self):
        # callable objects to finish pending /trigger requests
        self.triggers = collections.deque()  # type: typing.Deque[str]
        return Application(
            [
                url(
                    "/trigger",
                    TriggerHandler,
                    dict(queue=self.triggers, wake_callback=self.stop),
                ),
                url("/chunk", ChunkHandler),
                url("/countdown/([0-9]+)", CountdownHandler, name="countdown"),
                url("/hello", HelloWorldHandler),
                url("/content_length", ContentLengthHandler),
                url("/head", HeadHandler),
                url("/options", OptionsHandler),
                url("/no_content", NoContentHandler),
                url("/see_other_post", SeeOtherPostHandler),
                url("/see_other_get", SeeOtherGetHandler),
                url("/host_echo", HostEchoHandler),
                url("/no_content_length", NoContentLengthHandler),
                url("/echo_post", EchoPostHandler),
                url("/respond_in_prepare", RespondInPrepareHandler),
                url("/redirect", RedirectHandler),
            ],
            gzip=True,
        )

    def test_singleton(self):
        # Class "constructor" reuses objects on the same IOLoop
        self.assertTrue(SimpleAsyncHTTPClient() is SimpleAsyncHTTPClient())
        # unless force_instance is used
        self.assertTrue(
            SimpleAsyncHTTPClient() is not SimpleAsyncHTTPClient(force_instance=True)
        )
        # different IOLoops use different objects
        with closing(IOLoop()) as io_loop2:

            async def make_client():
                await gen.sleep(0)
                return SimpleAsyncHTTPClient()

            client1 = self.io_loop.run_sync(make_client)
            client2 = io_loop2.run_sync(make_client)
            self.assertTrue(client1 is not client2)

    def test_connection_limit(self):
        with closing(self.create_client(max_clients=2)) as client:
            self.assertEqual(client.max_clients, 2)
            seen = []
            # Send 4 requests.  Two can be sent immediately, while the others
            # will be queued
            for i in range(4):

                def cb(fut, i=i):
                    seen.append(i)
                    self.stop()

                client.fetch(self.get_url("/trigger")).add_done_callback(cb)
            self.wait(condition=lambda: len(self.triggers) == 2)
            self.assertEqual(len(client.queue), 2)

            # Finish the first two requests and let the next two through
            self.triggers.popleft()()
            self.triggers.popleft()()
            self.wait(condition=lambda: (len(self.triggers) == 2 and len(seen) == 2))
            self.assertEqual(set(seen), set([0, 1]))
            self.assertEqual(len(client.queue), 0)

            # Finish all the pending requests
            self.triggers.popleft()()
            self.triggers.popleft()()
            self.wait(condition=lambda: len(seen) == 4)
            self.assertEqual(set(seen), set([0, 1, 2, 3]))
            self.assertEqual(len(self.triggers), 0)

    @gen_test
    def test_redirect_connection_limit(self):
        # following redirects should not consume additional connections
        with closing(self.create_client(max_clients=1)) as client:
            response = yield client.fetch(self.get_url("/countdown/3"), max_redirects=3)
            response.rethrow()

    def test_gzip(self):
        # All the tests in this file should be using gzip, but this test
        # ensures that it is in fact getting compressed.
        # Setting Accept-Encoding manually bypasses the client's
        # decompression so we can see the raw data.
        response = self.fetch(
            "/chunk", use_gzip=False, headers={"Accept-Encoding": "gzip"}
        )
        self.assertEqual(response.headers["Content-Encoding"], "gzip")
        self.assertNotEqual(response.body, b"asdfqwer")
        # Our test data gets bigger when gzipped.  Oops.  :)
        # Chunked encoding bypasses the MIN_LENGTH check.
        self.assertEqual(len(response.body), 34)
        f = gzip.GzipFile(mode="r", fileobj=response.buffer)
        self.assertEqual(f.read(), b"asdfqwer")

    def test_max_redirects(self):
        response = self.fetch("/countdown/5", max_redirects=3)
        self.assertEqual(302, response.code)
        # We requested 5, followed three redirects for 4, 3, 2, then the last
        # unfollowed redirect is to 1.
        self.assertTrue(response.request.url.endswith("/countdown/5"))
        self.assertTrue(response.effective_url.endswith("/countdown/2"))
        self.assertTrue(response.headers["Location"].endswith("/countdown/1"))

    def test_header_reuse(self):
        # Apps may reuse a headers object if they are only passing in constant
        # headers like user-agent.  The header object should not be modified.
        headers = HTTPHeaders({"User-Agent": "Foo"})
        self.fetch("/hello", headers=headers)
        self.assertEqual(list(headers.get_all()), [("User-Agent", "Foo")])

    def test_see_other_redirect(self):
        for code in (302, 303):
            response = self.fetch("/see_other_post", method="POST", body="%d" % code)
            self.assertEqual(200, response.code)
            self.assertTrue(response.request.url.endswith("/see_other_post"))
            self.assertTrue(response.effective_url.endswith("/see_other_get"))
            # request is the original request, is a POST still
            self.assertEqual("POST", response.request.method)

    @skipOnTravis
    @gen_test
    def test_connect_timeout(self):
        timeout = 0.1

        cleanup_event = Event()
        test = self

        class TimeoutResolver(Resolver):
            async def resolve(self, *args, **kwargs):
                await cleanup_event.wait()
                # Return something valid so the test doesn't raise during shutdown.
                return [(socket.AF_INET, ("127.0.0.1", test.get_http_port()))]

        with closing(self.create_client(resolver=TimeoutResolver())) as client:
            with self.assertRaises(HTTPTimeoutError):
                yield client.fetch(
                    self.get_url("/hello"),
                    connect_timeout=timeout,
                    request_timeout=3600,
                    raise_error=True,
                )

        # Let the hanging coroutine clean up after itself. We need to
        # wait more than a single IOLoop iteration for the SSL case,
        # which logs errors on unexpected EOF.
        cleanup_event.set()
        yield gen.sleep(0.2)

    @skipOnTravis
    def test_request_timeout(self):
        timeout = 0.1
        if os.name == "nt":
            timeout = 0.5

        with self.assertRaises(HTTPTimeoutError):
            self.fetch("/trigger?wake=false", request_timeout=timeout, raise_error=True)
        # trigger the hanging request to let it clean up after itself
        self.triggers.popleft()()
        self.io_loop.run_sync(lambda: gen.sleep(0))

    @skipIfNoIPv6
    def test_ipv6(self):
        [sock] = bind_sockets(0, "::1", family=socket.AF_INET6)
        port = sock.getsockname()[1]
        self.http_server.add_socket(sock)
        url = "%s://[::1]:%d/hello" % (self.get_protocol(), port)

        # ipv6 is currently enabled by default but can be disabled
        with self.assertRaises(Exception):
            self.fetch(url, allow_ipv6=False, raise_error=True)

        response = self.fetch(url)
        self.assertEqual(response.body, b"Hello world!")

    def test_multiple_content_length_accepted(self):
        response = self.fetch("/content_length?value=2,2")
        self.assertEqual(response.body, b"ok")
        response = self.fetch("/content_length?value=2,%202,2")
        self.assertEqual(response.body, b"ok")

        with ExpectLog(gen_log, ".*Multiple unequal Content-Lengths"):
            with self.assertRaises(HTTPStreamClosedError):
                self.fetch("/content_length?value=2,4", raise_error=True)
            with self.assertRaises(HTTPStreamClosedError):
                self.fetch("/content_length?value=2,%202,3", raise_error=True)

    def test_head_request(self):
        response = self.fetch("/head", method="HEAD")
        self.assertEqual(response.code, 200)
        self.assertEqual(response.headers["content-length"], "7")
        self.assertFalse(response.body)

    def test_options_request(self):
        response = self.fetch("/options", method="OPTIONS")
        self.assertEqual(response.code, 200)
        self.assertEqual(response.headers["content-length"], "2")
        self.assertEqual(response.headers["access-control-allow-origin"], "*")
        self.assertEqual(response.body, b"ok")

    def test_no_content(self):
        response = self.fetch("/no_content")
        self.assertEqual(response.code, 204)
        # 204 status shouldn't have a content-length
        #
        # Tests with a content-length header are included below
        # in HTTP204NoContentTestCase.
        self.assertNotIn("Content-Length", response.headers)

    def test_host_header(self):
        host_re = re.compile(b"^127.0.0.1:[0-9]+$")
        response = self.fetch("/host_echo")
        self.assertTrue(host_re.match(response.body))

        url = self.get_url("/host_echo").replace("http://", "http://me:secret@")
        response = self.fetch(url)
        self.assertTrue(host_re.match(response.body), response.body)

    def test_connection_refused(self):
        cleanup_func, port = refusing_port()
        self.addCleanup(cleanup_func)
        with ExpectLog(gen_log, ".*", required=False):
            with self.assertRaises(socket.error) as cm:
                self.fetch("http://127.0.0.1:%d/" % port, raise_error=True)

        if sys.platform != "cygwin":
            # cygwin returns EPERM instead of ECONNREFUSED here
            contains_errno = str(errno.ECONNREFUSED) in str(cm.exception)
            if not contains_errno and hasattr(errno, "WSAECONNREFUSED"):
                contains_errno = str(errno.WSAECONNREFUSED) in str(  # type: ignore
                    cm.exception
                )
            self.assertTrue(contains_errno, cm.exception)
            # This is usually "Connection refused".
            # On windows, strerror is broken and returns "Unknown error".
            expected_message = os.strerror(errno.ECONNREFUSED)
            self.assertTrue(expected_message in str(cm.exception), cm.exception)

    def test_queue_timeout(self):
        with closing(self.create_client(max_clients=1)) as client:
            # Wait for the trigger request to block, not complete.
            fut1 = client.fetch(self.get_url("/trigger"), request_timeout=10)
            self.wait()
            with self.assertRaises(HTTPTimeoutError) as cm:
                self.io_loop.run_sync(
                    lambda: client.fetch(
                        self.get_url("/hello"), connect_timeout=0.1, raise_error=True
                    )
                )

            self.assertEqual(str(cm.exception), "Timeout in request queue")
            self.triggers.popleft()()
            self.io_loop.run_sync(lambda: fut1)

    def test_no_content_length(self):
        response = self.fetch("/no_content_length")
        if response.body == b"HTTP/1 required":
            self.skipTest("requires HTTP/1.x")
        else:
            self.assertEquals(b"hello", response.body)

    def sync_body_producer(self, write):
        write(b"1234")
        write(b"5678")

    @gen.coroutine
    def async_body_producer(self, write):
        yield write(b"1234")
        yield gen.moment
        yield write(b"5678")

    def test_sync_body_producer_chunked(self):
        response = self.fetch(
            "/echo_post", method="POST", body_producer=self.sync_body_producer
        )
        response.rethrow()
        self.assertEqual(response.body, b"12345678")

    def test_sync_body_producer_content_length(self):
        response = self.fetch(
            "/echo_post",
            method="POST",
            body_producer=self.sync_body_producer,
            headers={"Content-Length": "8"},
        )
        response.rethrow()
        self.assertEqual(response.body, b"12345678")

    def test_async_body_producer_chunked(self):
        response = self.fetch(
            "/echo_post", method="POST", body_producer=self.async_body_producer
        )
        response.rethrow()
        self.assertEqual(response.body, b"12345678")

    def test_async_body_producer_content_length(self):
        response = self.fetch(
            "/echo_post",
            method="POST",
            body_producer=self.async_body_producer,
            headers={"Content-Length": "8"},
        )
        response.rethrow()
        self.assertEqual(response.body, b"12345678")

    def test_native_body_producer_chunked(self):
        async def body_producer(write):
            await write(b"1234")
            import asyncio

            await asyncio.sleep(0)
            await write(b"5678")

        response = self.fetch("/echo_post", method="POST", body_producer=body_producer)
        response.rethrow()
        self.assertEqual(response.body, b"12345678")

    def test_native_body_producer_content_length(self):
        async def body_producer(write):
            await write(b"1234")
            import asyncio

            await asyncio.sleep(0)
            await write(b"5678")

        response = self.fetch(
            "/echo_post",
            method="POST",
            body_producer=body_producer,
            headers={"Content-Length": "8"},
        )
        response.rethrow()
        self.assertEqual(response.body, b"12345678")

    def test_100_continue(self):
        response = self.fetch(
            "/echo_post", method="POST", body=b"1234", expect_100_continue=True
        )
        self.assertEqual(response.body, b"1234")

    def test_100_continue_early_response(self):
        def body_producer(write):
            raise Exception("should not be called")

        response = self.fetch(
            "/respond_in_prepare",
            method="POST",
            body_producer=body_producer,
            expect_100_continue=True,
        )
        self.assertEqual(response.code, 403)

    def test_streaming_follow_redirects(self):
        # When following redirects, header and streaming callbacks
        # should only be called for the final result.
        # TODO(bdarnell): this test belongs in httpclient_test instead of
        # simple_httpclient_test, but it fails with the version of libcurl
        # available on travis-ci. Move it when that has been upgraded
        # or we have a better framework to skip tests based on curl version.
        headers = []  # type: typing.List[str]
        chunk_bytes = []  # type: typing.List[bytes]
        self.fetch(
            "/redirect?url=/hello",
            header_callback=headers.append,
            streaming_callback=chunk_bytes.append,
        )
        chunks = list(map(to_unicode, chunk_bytes))
        self.assertEqual(chunks, ["Hello world!"])
        # Make sure we only got one set of headers.
        num_start_lines = len([h for h in headers if h.startswith("HTTP/")])
        self.assertEqual(num_start_lines, 1)


class SimpleHTTPClientTestCase(SimpleHTTPClientTestMixin, AsyncHTTPTestCase):
    def setUp(self):
        super(SimpleHTTPClientTestCase, self).setUp()
        self.http_client = self.create_client()

    def create_client(self, **kwargs):
        return SimpleAsyncHTTPClient(force_instance=True, **kwargs)


class SimpleHTTPSClientTestCase(SimpleHTTPClientTestMixin, AsyncHTTPSTestCase):
    def setUp(self):
        super(SimpleHTTPSClientTestCase, self).setUp()
        self.http_client = self.create_client()

    def create_client(self, **kwargs):
        return SimpleAsyncHTTPClient(
            force_instance=True, defaults=dict(validate_cert=False), **kwargs
        )

    def test_ssl_options(self):
        resp = self.fetch("/hello", ssl_options={})
        self.assertEqual(resp.body, b"Hello world!")

    def test_ssl_context(self):
        resp = self.fetch("/hello", ssl_options=ssl.SSLContext(ssl.PROTOCOL_SSLv23))
        self.assertEqual(resp.body, b"Hello world!")

    def test_ssl_options_handshake_fail(self):
        with ExpectLog(gen_log, "SSL Error|Uncaught exception", required=False):
            with self.assertRaises(ssl.SSLError):
                self.fetch(
                    "/hello",
                    ssl_options=dict(cert_reqs=ssl.CERT_REQUIRED),
                    raise_error=True,
                )

    def test_ssl_context_handshake_fail(self):
        with ExpectLog(gen_log, "SSL Error|Uncaught exception"):
            ctx = ssl.SSLContext(ssl.PROTOCOL_SSLv23)
            ctx.verify_mode = ssl.CERT_REQUIRED
            with self.assertRaises(ssl.SSLError):
                self.fetch("/hello", ssl_options=ctx, raise_error=True)

    def test_error_logging(self):
        # No stack traces are logged for SSL errors (in this case,
        # failure to validate the testing self-signed cert).
        # The SSLError is exposed through ssl.SSLError.
        with ExpectLog(gen_log, ".*") as expect_log:
            with self.assertRaises(ssl.SSLError):
                self.fetch("/", validate_cert=True, raise_error=True)
        self.assertFalse(expect_log.logged_stack)


class CreateAsyncHTTPClientTestCase(AsyncTestCase):
    def setUp(self):
        super(CreateAsyncHTTPClientTestCase, self).setUp()
        self.saved = AsyncHTTPClient._save_configuration()

    def tearDown(self):
        AsyncHTTPClient._restore_configuration(self.saved)
        super(CreateAsyncHTTPClientTestCase, self).tearDown()

    def test_max_clients(self):
        AsyncHTTPClient.configure(SimpleAsyncHTTPClient)
        with closing(AsyncHTTPClient(force_instance=True)) as client:
            self.assertEqual(client.max_clients, 10)  # type: ignore
        with closing(AsyncHTTPClient(max_clients=11, force_instance=True)) as client:
            self.assertEqual(client.max_clients, 11)  # type: ignore

        # Now configure max_clients statically and try overriding it
        # with each way max_clients can be passed
        AsyncHTTPClient.configure(SimpleAsyncHTTPClient, max_clients=12)
        with closing(AsyncHTTPClient(force_instance=True)) as client:
            self.assertEqual(client.max_clients, 12)  # type: ignore
        with closing(AsyncHTTPClient(max_clients=13, force_instance=True)) as client:
            self.assertEqual(client.max_clients, 13)  # type: ignore
        with closing(AsyncHTTPClient(max_clients=14, force_instance=True)) as client:
            self.assertEqual(client.max_clients, 14)  # type: ignore


class HTTP100ContinueTestCase(AsyncHTTPTestCase):
    def respond_100(self, request):
        self.http1 = request.version.startswith("HTTP/1.")
        if not self.http1:
            request.connection.write_headers(
                ResponseStartLine("", 200, "OK"), HTTPHeaders()
            )
            request.connection.finish()
            return
        self.request = request
        fut = self.request.connection.stream.write(b"HTTP/1.1 100 CONTINUE\r\n\r\n")
        fut.add_done_callback(self.respond_200)

    def respond_200(self, fut):
        fut.result()
        fut = self.request.connection.stream.write(
            b"HTTP/1.1 200 OK\r\nContent-Length: 1\r\n\r\nA"
        )
        fut.add_done_callback(lambda f: self.request.connection.stream.close())

    def get_app(self):
        # Not a full Application, but works as an HTTPServer callback
        return self.respond_100

    def test_100_continue(self):
        res = self.fetch("/")
        if not self.http1:
            self.skipTest("requires HTTP/1.x")
        self.assertEqual(res.body, b"A")


class HTTP204NoContentTestCase(AsyncHTTPTestCase):
    def respond_204(self, request):
        self.http1 = request.version.startswith("HTTP/1.")
        if not self.http1:
            # Close the request cleanly in HTTP/2; it will be skipped anyway.
            request.connection.write_headers(
                ResponseStartLine("", 200, "OK"), HTTPHeaders()
            )
            request.connection.finish()
            return

        # A 204 response never has a body, even if doesn't have a content-length
        # (which would otherwise mean read-until-close).  We simulate here a
        # server that sends no content length and does not close the connection.
        #
        # Tests of a 204 response with no Content-Length header are included
        # in SimpleHTTPClientTestMixin.
        stream = request.connection.detach()
        stream.write(b"HTTP/1.1 204 No content\r\n")
        if request.arguments.get("error", [False])[-1]:
            stream.write(b"Content-Length: 5\r\n")
        else:
            stream.write(b"Content-Length: 0\r\n")
        stream.write(b"\r\n")
        stream.close()

    def get_app(self):
        return self.respond_204

    def test_204_no_content(self):
        resp = self.fetch("/")
        if not self.http1:
            self.skipTest("requires HTTP/1.x")
        self.assertEqual(resp.code, 204)
        self.assertEqual(resp.body, b"")

    def test_204_invalid_content_length(self):
        # 204 status with non-zero content length is malformed
        with ExpectLog(gen_log, ".*Response with code 204 should not have body"):
            with self.assertRaises(HTTPStreamClosedError):
                self.fetch("/?error=1", raise_error=True)
                if not self.http1:
                    self.skipTest("requires HTTP/1.x")
                if self.http_client.configured_class != SimpleAsyncHTTPClient:
                    self.skipTest("curl client accepts invalid headers")


class HostnameMappingTestCase(AsyncHTTPTestCase):
    def setUp(self):
        super(HostnameMappingTestCase, self).setUp()
        self.http_client = SimpleAsyncHTTPClient(
            hostname_mapping={
                "www.example.com": "127.0.0.1",
                ("foo.example.com", 8000): ("127.0.0.1", self.get_http_port()),
            }
        )

    def get_app(self):
        return Application([url("/hello", HelloWorldHandler)])

    def test_hostname_mapping(self):
        response = self.fetch("http://www.example.com:%d/hello" % self.get_http_port())
        response.rethrow()
        self.assertEqual(response.body, b"Hello world!")

    def test_port_mapping(self):
        response = self.fetch("http://foo.example.com:8000/hello")
        response.rethrow()
        self.assertEqual(response.body, b"Hello world!")


class ResolveTimeoutTestCase(AsyncHTTPTestCase):
    def setUp(self):
        self.cleanup_event = Event()
        test = self

        # Dummy Resolver subclass that never finishes.
        class BadResolver(Resolver):
            @gen.coroutine
            def resolve(self, *args, **kwargs):
                yield test.cleanup_event.wait()
                # Return something valid so the test doesn't raise during cleanup.
                return [(socket.AF_INET, ("127.0.0.1", test.get_http_port()))]

        super(ResolveTimeoutTestCase, self).setUp()
        self.http_client = SimpleAsyncHTTPClient(resolver=BadResolver())

    def get_app(self):
        return Application([url("/hello", HelloWorldHandler)])

    def test_resolve_timeout(self):
        with self.assertRaises(HTTPTimeoutError):
            self.fetch("/hello", connect_timeout=0.1, raise_error=True)

        # Let the hanging coroutine clean up after itself
        self.cleanup_event.set()
        self.io_loop.run_sync(lambda: gen.sleep(0))


class MaxHeaderSizeTest(AsyncHTTPTestCase):
    def get_app(self):
        class SmallHeaders(RequestHandler):
            def get(self):
                self.set_header("X-Filler", "a" * 100)
                self.write("ok")

        class LargeHeaders(RequestHandler):
            def get(self):
                self.set_header("X-Filler", "a" * 1000)
                self.write("ok")

        return Application([("/small", SmallHeaders), ("/large", LargeHeaders)])

    def get_http_client(self):
        return SimpleAsyncHTTPClient(max_header_size=1024)

    def test_small_headers(self):
        response = self.fetch("/small")
        response.rethrow()
        self.assertEqual(response.body, b"ok")

    def test_large_headers(self):
        with ExpectLog(gen_log, "Unsatisfiable read"):
            with self.assertRaises(UnsatisfiableReadError):
                self.fetch("/large", raise_error=True)


class MaxBodySizeTest(AsyncHTTPTestCase):
    def get_app(self):
        class SmallBody(RequestHandler):
            def get(self):
                self.write("a" * 1024 * 64)

        class LargeBody(RequestHandler):
            def get(self):
                self.write("a" * 1024 * 100)

        return Application([("/small", SmallBody), ("/large", LargeBody)])

    def get_http_client(self):
        return SimpleAsyncHTTPClient(max_body_size=1024 * 64)

    def test_small_body(self):
        response = self.fetch("/small")
        response.rethrow()
        self.assertEqual(response.body, b"a" * 1024 * 64)

    def test_large_body(self):
        with ExpectLog(
            gen_log, "Malformed HTTP message from None: Content-Length too long"
        ):
            with self.assertRaises(HTTPStreamClosedError):
                self.fetch("/large", raise_error=True)


class MaxBufferSizeTest(AsyncHTTPTestCase):
    def get_app(self):
        class LargeBody(RequestHandler):
            def get(self):
                self.write("a" * 1024 * 100)

        return Application([("/large", LargeBody)])

    def get_http_client(self):
        # 100KB body with 64KB buffer
        return SimpleAsyncHTTPClient(
            max_body_size=1024 * 100, max_buffer_size=1024 * 64
        )

    def test_large_body(self):
        response = self.fetch("/large")
        response.rethrow()
        self.assertEqual(response.body, b"a" * 1024 * 100)


class ChunkedWithContentLengthTest(AsyncHTTPTestCase):
    def get_app(self):
        class ChunkedWithContentLength(RequestHandler):
            def get(self):
                # Add an invalid Transfer-Encoding to the response
                self.set_header("Transfer-Encoding", "chunked")
                self.write("Hello world")

        return Application([("/chunkwithcl", ChunkedWithContentLength)])

    def get_http_client(self):
        return SimpleAsyncHTTPClient()

    def test_chunked_with_content_length(self):
        # Make sure the invalid headers are detected
        with ExpectLog(
            gen_log,
            (
                "Malformed HTTP message from None: Response "
                "with both Transfer-Encoding and Content-Length"
            ),
        ):
            with self.assertRaises(HTTPStreamClosedError):
                self.fetch("/chunkwithcl", raise_error=True)

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