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# -*- coding: utf-8 -*-
import base64
import binascii
from contextlib import closing
import copy
import threading
import datetime
from io import BytesIO
import subprocess
import sys
import time
import typing  # noqa: F401
import unicodedata
import unittest

from tornado.escape import utf8, native_str, to_unicode
from tornado import gen
from tornado.httpclient import (
    HTTPRequest,
    HTTPResponse,
    _RequestProxy,
    HTTPError,
    HTTPClient,
)
from tornado.httpserver import HTTPServer
from tornado.ioloop import IOLoop
from tornado.iostream import IOStream
from tornado.log import gen_log, app_log
from tornado import netutil
from tornado.testing import AsyncHTTPTestCase, bind_unused_port, gen_test, ExpectLog
from tornado.test.util import skipOnTravis
from tornado.web import Application, RequestHandler, url
from tornado.httputil import format_timestamp, HTTPHeaders


class HelloWorldHandler(RequestHandler):
    def get(self):
        name = self.get_argument("name", "world")
        self.set_header("Content-Type", "text/plain")
        self.finish("Hello %s!" % name)


class PostHandler(RequestHandler):
    def post(self):
        self.finish(
            "Post arg1: %s, arg2: %s"
            % (self.get_argument("arg1"), self.get_argument("arg2"))
        )


class PutHandler(RequestHandler):
    def put(self):
        self.write("Put body: ")
        self.write(self.request.body)


class RedirectHandler(RequestHandler):
    def prepare(self):
        self.write("redirects can have bodies too")
        self.redirect(
            self.get_argument("url"), status=int(self.get_argument("status", "302"))
        )


class RedirectWithoutLocationHandler(RequestHandler):
    def prepare(self):
        # For testing error handling of a redirect with no location header.
        self.set_status(301)
        self.finish()


class ChunkHandler(RequestHandler):
    @gen.coroutine
    def get(self):
        self.write("asdf")
        self.flush()
        # Wait a bit to ensure the chunks are sent and received separately.
        yield gen.sleep(0.01)
        self.write("qwer")


class AuthHandler(RequestHandler):
    def get(self):
        self.finish(self.request.headers["Authorization"])


class CountdownHandler(RequestHandler):
    def get(self, count):
        count = int(count)
        if count > 0:
            self.redirect(self.reverse_url("countdown", count - 1))
        else:
            self.write("Zero")


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


class UserAgentHandler(RequestHandler):
    def get(self):
        self.write(self.request.headers.get("User-Agent", "User agent not set"))


class ContentLength304Handler(RequestHandler):
    def get(self):
        self.set_status(304)
        self.set_header("Content-Length", 42)

    def _clear_headers_for_304(self):
        # Tornado strips content-length from 304 responses, but here we
        # want to simulate servers that include the headers anyway.
        pass


class PatchHandler(RequestHandler):
    def patch(self):
        "Return the request payload - so we can check it is being kept"
        self.write(self.request.body)


class AllMethodsHandler(RequestHandler):
    SUPPORTED_METHODS = RequestHandler.SUPPORTED_METHODS + ("OTHER",)  # type: ignore

    def method(self):
        self.write(self.request.method)

    get = head = post = put = delete = options = patch = other = method  # type: ignore


class SetHeaderHandler(RequestHandler):
    def get(self):
        # Use get_arguments for keys to get strings, but
        # request.arguments for values to get bytes.
        for k, v in zip(self.get_arguments("k"), self.request.arguments["v"]):
            self.set_header(k, v)


# These tests end up getting run redundantly: once here with the default
# HTTPClient implementation, and then again in each implementation's own
# test suite.


class HTTPClientCommonTestCase(AsyncHTTPTestCase):
    def get_app(self):
        return Application(
            [
                url("/hello", HelloWorldHandler),
                url("/post", PostHandler),
                url("/put", PutHandler),
                url("/redirect", RedirectHandler),
                url("/redirect_without_location", RedirectWithoutLocationHandler),
                url("/chunk", ChunkHandler),
                url("/auth", AuthHandler),
                url("/countdown/([0-9]+)", CountdownHandler, name="countdown"),
                url("/echopost", EchoPostHandler),
                url("/user_agent", UserAgentHandler),
                url("/304_with_content_length", ContentLength304Handler),
                url("/all_methods", AllMethodsHandler),
                url("/patch", PatchHandler),
                url("/set_header", SetHeaderHandler),
            ],
            gzip=True,
        )

    def test_patch_receives_payload(self):
        body = b"some patch data"
        response = self.fetch("/patch", method="PATCH", body=body)
        self.assertEqual(response.code, 200)
        self.assertEqual(response.body, body)

    @skipOnTravis
    def test_hello_world(self):
        response = self.fetch("/hello")
        self.assertEqual(response.code, 200)
        self.assertEqual(response.headers["Content-Type"], "text/plain")
        self.assertEqual(response.body, b"Hello world!")
        self.assertEqual(int(response.request_time), 0)

        response = self.fetch("/hello?name=Ben")
        self.assertEqual(response.body, b"Hello Ben!")

    def test_streaming_callback(self):
        # streaming_callback is also tested in test_chunked
        chunks = []  # type: typing.List[bytes]
        response = self.fetch("/hello", streaming_callback=chunks.append)
        # with streaming_callback, data goes to the callback and not response.body
        self.assertEqual(chunks, [b"Hello world!"])
        self.assertFalse(response.body)

    def test_post(self):
        response = self.fetch("/post", method="POST", body="arg1=foo&arg2=bar")
        self.assertEqual(response.code, 200)
        self.assertEqual(response.body, b"Post arg1: foo, arg2: bar")

    def test_chunked(self):
        response = self.fetch("/chunk")
        self.assertEqual(response.body, b"asdfqwer")

        chunks = []  # type: typing.List[bytes]
        response = self.fetch("/chunk", streaming_callback=chunks.append)
        self.assertEqual(chunks, [b"asdf", b"qwer"])
        self.assertFalse(response.body)

    def test_chunked_close(self):
        # test case in which chunks spread read-callback processing
        # over several ioloop iterations, but the connection is already closed.
        sock, port = bind_unused_port()
        with closing(sock):

            @gen.coroutine
            def accept_callback(conn, address):
                # fake an HTTP server using chunked encoding where the final chunks
                # and connection close all happen at once
                stream = IOStream(conn)
                request_data = yield stream.read_until(b"\r\n\r\n")
                if b"HTTP/1." not in request_data:
                    self.skipTest("requires HTTP/1.x")
                yield stream.write(
                    b"""\
HTTP/1.1 200 OK
Transfer-Encoding: chunked

1
1
1
2
0

""".replace(
                        b"\n", b"\r\n"
                    )
                )
                stream.close()

            netutil.add_accept_handler(sock, accept_callback)  # type: ignore
            resp = self.fetch("http://127.0.0.1:%d/" % port)
            resp.rethrow()
            self.assertEqual(resp.body, b"12")
            self.io_loop.remove_handler(sock.fileno())

    def test_basic_auth(self):
        # This test data appears in section 2 of RFC 7617.
        self.assertEqual(
            self.fetch(
                "/auth", auth_username="Aladdin", auth_password="open sesame"
            ).body,
            b"Basic QWxhZGRpbjpvcGVuIHNlc2FtZQ==",
        )

    def test_basic_auth_explicit_mode(self):
        self.assertEqual(
            self.fetch(
                "/auth",
                auth_username="Aladdin",
                auth_password="open sesame",
                auth_mode="basic",
            ).body,
            b"Basic QWxhZGRpbjpvcGVuIHNlc2FtZQ==",
        )

    def test_basic_auth_unicode(self):
        # This test data appears in section 2.1 of RFC 7617.
        self.assertEqual(
            self.fetch("/auth", auth_username="test", auth_password="123£").body,
            b"Basic dGVzdDoxMjPCow==",
        )

        # The standard mandates NFC. Give it a decomposed username
        # and ensure it is normalized to composed form.
        username = unicodedata.normalize("NFD", u"josé")
        self.assertEqual(
            self.fetch("/auth", auth_username=username, auth_password="səcrət").body,
            b"Basic am9zw6k6c8mZY3LJmXQ=",
        )

    def test_unsupported_auth_mode(self):
        # curl and simple clients handle errors a bit differently; the
        # important thing is that they don't fall back to basic auth
        # on an unknown mode.
        with ExpectLog(gen_log, "uncaught exception", required=False):
            with self.assertRaises((ValueError, HTTPError)):
                self.fetch(
                    "/auth",
                    auth_username="Aladdin",
                    auth_password="open sesame",
                    auth_mode="asdf",
                    raise_error=True,
                )

    def test_follow_redirect(self):
        response = self.fetch("/countdown/2", follow_redirects=False)
        self.assertEqual(302, response.code)
        self.assertTrue(response.headers["Location"].endswith("/countdown/1"))

        response = self.fetch("/countdown/2")
        self.assertEqual(200, response.code)
        self.assertTrue(response.effective_url.endswith("/countdown/0"))
        self.assertEqual(b"Zero", response.body)

    def test_redirect_without_location(self):
        response = self.fetch("/redirect_without_location", follow_redirects=True)
        # If there is no location header, the redirect response should
        # just be returned as-is. (This should arguably raise an
        # error, but libcurl doesn't treat this as an error, so we
        # don't either).
        self.assertEqual(301, response.code)

    def test_redirect_put_with_body(self):
        response = self.fetch(
            "/redirect?url=/put&status=307", method="PUT", body="hello"
        )
        self.assertEqual(response.body, b"Put body: hello")

    def test_redirect_put_without_body(self):
        # This "without body" edge case is similar to what happens with body_producer.
        response = self.fetch(
            "/redirect?url=/put&status=307",
            method="PUT",
            allow_nonstandard_methods=True,
        )
        self.assertEqual(response.body, b"Put body: ")

    def test_method_after_redirect(self):
        # Legacy redirect codes (301, 302) convert POST requests to GET.
        for status in [301, 302, 303]:
            url = "/redirect?url=/all_methods&status=%d" % status
            resp = self.fetch(url, method="POST", body=b"")
            self.assertEqual(b"GET", resp.body)

            # Other methods are left alone.
            for method in ["GET", "OPTIONS", "PUT", "DELETE"]:
                resp = self.fetch(url, method=method, allow_nonstandard_methods=True)
                self.assertEqual(utf8(method), resp.body)
            # HEAD is different so check it separately.
            resp = self.fetch(url, method="HEAD")
            self.assertEqual(200, resp.code)
            self.assertEqual(b"", resp.body)

        # Newer redirects always preserve the original method.
        for status in [307, 308]:
            url = "/redirect?url=/all_methods&status=307"
            for method in ["GET", "OPTIONS", "POST", "PUT", "DELETE"]:
                resp = self.fetch(url, method=method, allow_nonstandard_methods=True)
                self.assertEqual(method, to_unicode(resp.body))
            resp = self.fetch(url, method="HEAD")
            self.assertEqual(200, resp.code)
            self.assertEqual(b"", resp.body)

    def test_credentials_in_url(self):
        url = self.get_url("/auth").replace("http://", "http://me:secret@")
        response = self.fetch(url)
        self.assertEqual(b"Basic " + base64.b64encode(b"me:secret"), response.body)

    def test_body_encoding(self):
        unicode_body = u"\xe9"
        byte_body = binascii.a2b_hex(b"e9")

        # unicode string in body gets converted to utf8
        response = self.fetch(
            "/echopost",
            method="POST",
            body=unicode_body,
            headers={"Content-Type": "application/blah"},
        )
        self.assertEqual(response.headers["Content-Length"], "2")
        self.assertEqual(response.body, utf8(unicode_body))

        # byte strings pass through directly
        response = self.fetch(
            "/echopost",
            method="POST",
            body=byte_body,
            headers={"Content-Type": "application/blah"},
        )
        self.assertEqual(response.headers["Content-Length"], "1")
        self.assertEqual(response.body, byte_body)

        # Mixing unicode in headers and byte string bodies shouldn't
        # break anything
        response = self.fetch(
            "/echopost",
            method="POST",
            body=byte_body,
            headers={"Content-Type": "application/blah"},
            user_agent=u"foo",
        )
        self.assertEqual(response.headers["Content-Length"], "1")
        self.assertEqual(response.body, byte_body)

    def test_types(self):
        response = self.fetch("/hello")
        self.assertEqual(type(response.body), bytes)
        self.assertEqual(type(response.headers["Content-Type"]), str)
        self.assertEqual(type(response.code), int)
        self.assertEqual(type(response.effective_url), str)

    def test_header_callback(self):
        first_line = []
        headers = {}
        chunks = []

        def header_callback(header_line):
            if header_line.startswith("HTTP/1.1 101"):
                # Upgrading to HTTP/2
                pass
            elif header_line.startswith("HTTP/"):
                first_line.append(header_line)
            elif header_line != "\r\n":
                k, v = header_line.split(":", 1)
                headers[k.lower()] = v.strip()

        def streaming_callback(chunk):
            # All header callbacks are run before any streaming callbacks,
            # so the header data is available to process the data as it
            # comes in.
            self.assertEqual(headers["content-type"], "text/html; charset=UTF-8")
            chunks.append(chunk)

        self.fetch(
            "/chunk",
            header_callback=header_callback,
            streaming_callback=streaming_callback,
        )
        self.assertEqual(len(first_line), 1, first_line)
        self.assertRegexpMatches(first_line[0], "HTTP/[0-9]\\.[0-9] 200.*\r\n")
        self.assertEqual(chunks, [b"asdf", b"qwer"])

    @gen_test
    def test_configure_defaults(self):
        defaults = dict(user_agent="TestDefaultUserAgent", allow_ipv6=False)
        # Construct a new instance of the configured client class
        client = self.http_client.__class__(force_instance=True, defaults=defaults)
        try:
            response = yield client.fetch(self.get_url("/user_agent"))
            self.assertEqual(response.body, b"TestDefaultUserAgent")
        finally:
            client.close()

    def test_header_types(self):
        # Header values may be passed as character or utf8 byte strings,
        # in a plain dictionary or an HTTPHeaders object.
        # Keys must always be the native str type.
        # All combinations should have the same results on the wire.
        for value in [u"MyUserAgent", b"MyUserAgent"]:
            for container in [dict, HTTPHeaders]:
                headers = container()
                headers["User-Agent"] = value
                resp = self.fetch("/user_agent", headers=headers)
                self.assertEqual(
                    resp.body,
                    b"MyUserAgent",
                    "response=%r, value=%r, container=%r"
                    % (resp.body, value, container),
                )

    def test_multi_line_headers(self):
        # Multi-line http headers are rare but rfc-allowed
        # http://www.w3.org/Protocols/rfc2616/rfc2616-sec4.html#sec4.2
        sock, port = bind_unused_port()
        with closing(sock):

            @gen.coroutine
            def accept_callback(conn, address):
                stream = IOStream(conn)
                request_data = yield stream.read_until(b"\r\n\r\n")
                if b"HTTP/1." not in request_data:
                    self.skipTest("requires HTTP/1.x")
                yield stream.write(
                    b"""\
HTTP/1.1 200 OK
X-XSS-Protection: 1;
\tmode=block

""".replace(
                        b"\n", b"\r\n"
                    )
                )
                stream.close()

            netutil.add_accept_handler(sock, accept_callback)  # type: ignore
            resp = self.fetch("http://127.0.0.1:%d/" % port)
            resp.rethrow()
            self.assertEqual(resp.headers["X-XSS-Protection"], "1; mode=block")
            self.io_loop.remove_handler(sock.fileno())

    def test_304_with_content_length(self):
        # According to the spec 304 responses SHOULD NOT include
        # Content-Length or other entity headers, but some servers do it
        # anyway.
        # http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html#sec10.3.5
        response = self.fetch("/304_with_content_length")
        self.assertEqual(response.code, 304)
        self.assertEqual(response.headers["Content-Length"], "42")

    @gen_test
    def test_future_interface(self):
        response = yield self.http_client.fetch(self.get_url("/hello"))
        self.assertEqual(response.body, b"Hello world!")

    @gen_test
    def test_future_http_error(self):
        with self.assertRaises(HTTPError) as context:
            yield self.http_client.fetch(self.get_url("/notfound"))
        self.assertEqual(context.exception.code, 404)
        self.assertEqual(context.exception.response.code, 404)

    @gen_test
    def test_future_http_error_no_raise(self):
        response = yield self.http_client.fetch(
            self.get_url("/notfound"), raise_error=False
        )
        self.assertEqual(response.code, 404)

    @gen_test
    def test_reuse_request_from_response(self):
        # The response.request attribute should be an HTTPRequest, not
        # a _RequestProxy.
        # This test uses self.http_client.fetch because self.fetch calls
        # self.get_url on the input unconditionally.
        url = self.get_url("/hello")
        response = yield self.http_client.fetch(url)
        self.assertEqual(response.request.url, url)
        self.assertTrue(isinstance(response.request, HTTPRequest))
        response2 = yield self.http_client.fetch(response.request)
        self.assertEqual(response2.body, b"Hello world!")

    @gen_test
    def test_bind_source_ip(self):
        url = self.get_url("/hello")
        request = HTTPRequest(url, network_interface="127.0.0.1")
        response = yield self.http_client.fetch(request)
        self.assertEqual(response.code, 200)

        with self.assertRaises((ValueError, HTTPError)) as context:
            request = HTTPRequest(url, network_interface="not-interface-or-ip")
            yield self.http_client.fetch(request)
        self.assertIn("not-interface-or-ip", str(context.exception))

    def test_all_methods(self):
        for method in ["GET", "DELETE", "OPTIONS"]:
            response = self.fetch("/all_methods", method=method)
            self.assertEqual(response.body, utf8(method))
        for method in ["POST", "PUT", "PATCH"]:
            response = self.fetch("/all_methods", method=method, body=b"")
            self.assertEqual(response.body, utf8(method))
        response = self.fetch("/all_methods", method="HEAD")
        self.assertEqual(response.body, b"")
        response = self.fetch(
            "/all_methods", method="OTHER", allow_nonstandard_methods=True
        )
        self.assertEqual(response.body, b"OTHER")

    def test_body_sanity_checks(self):
        # These methods require a body.
        for method in ("POST", "PUT", "PATCH"):
            with self.assertRaises(ValueError) as context:
                self.fetch("/all_methods", method=method, raise_error=True)
            self.assertIn("must not be None", str(context.exception))

            resp = self.fetch(
                "/all_methods", method=method, allow_nonstandard_methods=True
            )
            self.assertEqual(resp.code, 200)

        # These methods don't allow a body.
        for method in ("GET", "DELETE", "OPTIONS"):
            with self.assertRaises(ValueError) as context:
                self.fetch(
                    "/all_methods", method=method, body=b"asdf", raise_error=True
                )
            self.assertIn("must be None", str(context.exception))

            # In most cases this can be overridden, but curl_httpclient
            # does not allow body with a GET at all.
            if method != "GET":
                self.fetch(
                    "/all_methods",
                    method=method,
                    body=b"asdf",
                    allow_nonstandard_methods=True,
                    raise_error=True,
                )
                self.assertEqual(resp.code, 200)

    # This test causes odd failures with the combination of
    # curl_httpclient (at least with the version of libcurl available
    # on ubuntu 12.04), TwistedIOLoop, and epoll.  For POST (but not PUT),
    # curl decides the response came back too soon and closes the connection
    # to start again.  It does this *before* telling the socket callback to
    # unregister the FD.  Some IOLoop implementations have special kernel
    # integration to discover this immediately.  Tornado's IOLoops
    # ignore errors on remove_handler to accommodate this behavior, but
    # Twisted's reactor does not.  The removeReader call fails and so
    # do all future removeAll calls (which our tests do at cleanup).
    #
    # def test_post_307(self):
    #    response = self.fetch("/redirect?status=307&url=/post",
    #                          method="POST", body=b"arg1=foo&arg2=bar")
    #    self.assertEqual(response.body, b"Post arg1: foo, arg2: bar")

    def test_put_307(self):
        response = self.fetch(
            "/redirect?status=307&url=/put", method="PUT", body=b"hello"
        )
        response.rethrow()
        self.assertEqual(response.body, b"Put body: hello")

    def test_non_ascii_header(self):
        # Non-ascii headers are sent as latin1.
        response = self.fetch("/set_header?k=foo&v=%E9")
        response.rethrow()
        self.assertEqual(response.headers["Foo"], native_str(u"\u00e9"))

    def test_response_times(self):
        # A few simple sanity checks of the response time fields to
        # make sure they're using the right basis (between the
        # wall-time and monotonic clocks).
        start_time = time.time()
        response = self.fetch("/hello")
        response.rethrow()
        self.assertGreaterEqual(response.request_time, 0)
        self.assertLess(response.request_time, 1.0)
        # A very crude check to make sure that start_time is based on
        # wall time and not the monotonic clock.
        self.assertLess(abs(response.start_time - start_time), 1.0)

        for k, v in response.time_info.items():
            self.assertTrue(0 <= v < 1.0, "time_info[%s] out of bounds: %s" % (k, v))

    @gen_test
    def test_error_after_cancel(self):
        fut = self.http_client.fetch(self.get_url("/404"))
        self.assertTrue(fut.cancel())
        with ExpectLog(app_log, "Exception after Future was cancelled") as el:
            # We can't wait on the cancelled Future any more, so just
            # let the IOLoop run until the exception gets logged (or
            # not, in which case we exit the loop and ExpectLog will
            # raise).
            for i in range(100):
                yield gen.sleep(0.01)
                if el.logged_stack:
                    break


class RequestProxyTest(unittest.TestCase):
    def test_request_set(self):
        proxy = _RequestProxy(
            HTTPRequest("http://example.com/", user_agent="foo"), dict()
        )
        self.assertEqual(proxy.user_agent, "foo")

    def test_default_set(self):
        proxy = _RequestProxy(
            HTTPRequest("http://example.com/"), dict(network_interface="foo")
        )
        self.assertEqual(proxy.network_interface, "foo")

    def test_both_set(self):
        proxy = _RequestProxy(
            HTTPRequest("http://example.com/", proxy_host="foo"), dict(proxy_host="bar")
        )
        self.assertEqual(proxy.proxy_host, "foo")

    def test_neither_set(self):
        proxy = _RequestProxy(HTTPRequest("http://example.com/"), dict())
        self.assertIs(proxy.auth_username, None)

    def test_bad_attribute(self):
        proxy = _RequestProxy(HTTPRequest("http://example.com/"), dict())
        with self.assertRaises(AttributeError):
            proxy.foo

    def test_defaults_none(self):
        proxy = _RequestProxy(HTTPRequest("http://example.com/"), None)
        self.assertIs(proxy.auth_username, None)


class HTTPResponseTestCase(unittest.TestCase):
    def test_str(self):
        response = HTTPResponse(  # type: ignore
            HTTPRequest("http://example.com"), 200, headers={}, buffer=BytesIO()
        )
        s = str(response)
        self.assertTrue(s.startswith("HTTPResponse("))
        self.assertIn("code=200", s)


class SyncHTTPClientTest(unittest.TestCase):
    def setUp(self):
        self.server_ioloop = IOLoop()
        event = threading.Event()

        @gen.coroutine
        def init_server():
            sock, self.port = bind_unused_port()
            app = Application([("/", HelloWorldHandler)])
            self.server = HTTPServer(app)
            self.server.add_socket(sock)
            event.set()

        def start():
            self.server_ioloop.run_sync(init_server)
            self.server_ioloop.start()

        self.server_thread = threading.Thread(target=start)
        self.server_thread.start()
        event.wait()

        self.http_client = HTTPClient()

    def tearDown(self):
        def stop_server():
            self.server.stop()
            # Delay the shutdown of the IOLoop by several iterations because
            # the server may still have some cleanup work left when
            # the client finishes with the response (this is noticeable
            # with http/2, which leaves a Future with an unexamined
            # StreamClosedError on the loop).

            @gen.coroutine
            def slow_stop():
                yield self.server.close_all_connections()
                # The number of iterations is difficult to predict. Typically,
                # one is sufficient, although sometimes it needs more.
                for i in range(5):
                    yield
                self.server_ioloop.stop()

            self.server_ioloop.add_callback(slow_stop)

        self.server_ioloop.add_callback(stop_server)
        self.server_thread.join()
        self.http_client.close()
        self.server_ioloop.close(all_fds=True)

    def get_url(self, path):
        return "http://127.0.0.1:%d%s" % (self.port, path)

    def test_sync_client(self):
        response = self.http_client.fetch(self.get_url("/"))
        self.assertEqual(b"Hello world!", response.body)

    def test_sync_client_error(self):
        # Synchronous HTTPClient raises errors directly; no need for
        # response.rethrow()
        with self.assertRaises(HTTPError) as assertion:
            self.http_client.fetch(self.get_url("/notfound"))
        self.assertEqual(assertion.exception.code, 404)


class SyncHTTPClientSubprocessTest(unittest.TestCase):
    def test_destructor_log(self):
        # Regression test for
        # https://github.com/tornadoweb/tornado/issues/2539
        #
        # In the past, the following program would log an
        # "inconsistent AsyncHTTPClient cache" error from a destructor
        # when the process is shutting down. The shutdown process is
        # subtle and I don't fully understand it; the failure does not
        # manifest if that lambda isn't there or is a simpler object
        # like an int (nor does it manifest in the tornado test suite
        # as a whole, which is why we use this subprocess).
        proc = subprocess.run(
            [
                sys.executable,
                "-c",
                "from tornado.httpclient import HTTPClient; f = lambda: None; c = HTTPClient()",
            ],
            stdout=subprocess.PIPE,
            stderr=subprocess.STDOUT,
            check=True,
        )
        if proc.stdout:
            print("STDOUT:")
            print(to_unicode(proc.stdout))
        if proc.stdout:
            self.fail("subprocess produced unexpected output")


class HTTPRequestTestCase(unittest.TestCase):
    def test_headers(self):
        request = HTTPRequest("http://example.com", headers={"foo": "bar"})
        self.assertEqual(request.headers, {"foo": "bar"})

    def test_headers_setter(self):
        request = HTTPRequest("http://example.com")
        request.headers = {"bar": "baz"}  # type: ignore
        self.assertEqual(request.headers, {"bar": "baz"})

    def test_null_headers_setter(self):
        request = HTTPRequest("http://example.com")
        request.headers = None  # type: ignore
        self.assertEqual(request.headers, {})

    def test_body(self):
        request = HTTPRequest("http://example.com", body="foo")
        self.assertEqual(request.body, utf8("foo"))

    def test_body_setter(self):
        request = HTTPRequest("http://example.com")
        request.body = "foo"  # type: ignore
        self.assertEqual(request.body, utf8("foo"))

    def test_if_modified_since(self):
        http_date = datetime.datetime.utcnow()
        request = HTTPRequest("http://example.com", if_modified_since=http_date)
        self.assertEqual(
            request.headers, {"If-Modified-Since": format_timestamp(http_date)}
        )


class HTTPErrorTestCase(unittest.TestCase):
    def test_copy(self):
        e = HTTPError(403)
        e2 = copy.copy(e)
        self.assertIsNot(e, e2)
        self.assertEqual(e.code, e2.code)

    def test_plain_error(self):
        e = HTTPError(403)
        self.assertEqual(str(e), "HTTP 403: Forbidden")
        self.assertEqual(repr(e), "HTTP 403: Forbidden")

    def test_error_with_response(self):
        resp = HTTPResponse(HTTPRequest("http://example.com/"), 403)
        with self.assertRaises(HTTPError) as cm:
            resp.rethrow()
        e = cm.exception
        self.assertEqual(str(e), "HTTP 403: Forbidden")
        self.assertEqual(repr(e), "HTTP 403: Forbidden")

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