Merge remote-tracking branch 'origin/master' into check-crawl-errors

conftest.py

@@ -47,7 +47,7 @@ if not H2_ENABLED:
     collect_ignore.extend(
         (
             "scrapy/core/downloader/handlers/http2.py",
-            *_py_files("scrapy/core/http2"),
+            *_py_files("scrapy/core/_http2"),
         )
     )
 
@@ -107,6 +107,14 @@ def pytest_configure(config):
         install_reactor_import_hook()
 
 
+def pytest_collection_modifyitems(items):
+    for item in items:
+        if item.get_closest_marker("requires_internet"):
+            # Requests to real websites fail every now and then in CI for
+            # reasons unrelated to the code under test.
+            item.add_marker(pytest.mark.flaky(reruns=2, reruns_delay=5))
+
+
 def pytest_runtest_setup(item):
     # Skip tests based on reactor markers
     reactor = item.config.getoption("--reactor")

docs/topics/download-handlers.rst

@@ -187,12 +187,6 @@ If you want to use this handler you need to replace the default one for the
 Features and limitations
 ^^^^^^^^^^^^^^^^^^^^^^^^
 
-.. warning::
-
-    This handler is experimental, and not yet recommended for production
-    environments. Future Scrapy versions may introduce related changes without
-    a deprecation period or warning.
-
 =========================== ================================================
 HTTP proxies                No (not implemented)
 SOCKS proxies               No (not supported by the library)

scrapy/core/_http2/agent.py

@@ -14,8 +14,8 @@ from twisted.web.client import (
 )
 from twisted.web.error import SchemeNotSupported
 
+from scrapy.core._http2.protocol import H2ClientFactory, H2ClientProtocol
 from scrapy.core.downloader.contextfactory import _AcceptableProtocolsContextFactory
-from scrapy.core.http2.protocol import H2ClientFactory, H2ClientProtocol
 
 if TYPE_CHECKING:
     from twisted.internet.base import ReactorBase

scrapy/core/_http2/protocol.py

@@ -31,7 +31,7 @@ from twisted.internet.ssl import Certificate
 from twisted.protocols.policies import TimeoutMixin
 from zope.interface import implementer
 
-from scrapy.core.http2.stream import Stream, StreamCloseReason
+from scrapy.core._http2.stream import Stream, StreamCloseReason
 from scrapy.exceptions import DownloadTimeoutError
 from scrapy.http import Request, Response
 from scrapy.utils.deprecate import warn_on_deprecated_spider_attribute

scrapy/core/_http2/stream.py

@@ -27,7 +27,7 @@ from scrapy.utils.httpobj import urlparse_cached
 if TYPE_CHECKING:
     from collections.abc import Sequence
 
-    from scrapy.core.http2.protocol import H2ClientProtocol
+    from scrapy.core._http2.protocol import H2ClientProtocol
     from scrapy.crawler import Crawler
     from scrapy.http import Request, Response
 

scrapy/core/downloader/handlers/http2.py

@@ -4,9 +4,9 @@ from time import monotonic
 from typing import TYPE_CHECKING
 from urllib.parse import urldefrag
 
+from scrapy.core._http2.agent import H2Agent, H2ConnectionPool
 from scrapy.core.downloader.contextfactory import _load_context_factory_from_settings
 from scrapy.core.downloader.handlers.base import BaseDownloadHandler
-from scrapy.core.http2.agent import H2Agent, H2ConnectionPool
 from scrapy.exceptions import (
     DownloadTimeoutError,
     NotConfigured,

tests/test_downloader_handler_twisted_http2.py

@@ -143,7 +143,7 @@ class TestHttp2(H2DownloadHandlerMixin, TestHttpsBase):
                 response = await download_handler.download_request(request)
         assert response.text == actual_content_length
         assert (
-            "scrapy.core.http2.stream",
+            "scrapy.core._http2.stream",
             logging.WARNING,
             f"Ignoring bad Content-Length header "
             f"{bad_content_length!r} of request {request}, sending "

tests/test_http2_client_protocol.py

@@ -36,7 +36,7 @@ from tests.mockserver.utils import ssl_context_factory
 if TYPE_CHECKING:
     from collections.abc import AsyncGenerator, Callable, Coroutine, Generator
 
-    from scrapy.core.http2.protocol import H2ClientProtocol
+    from scrapy.core._http2.protocol import H2ClientProtocol
 
 
 pytestmark = [
@@ -242,7 +242,7 @@ class TestHttps2ClientProtocol:
     ) -> AsyncGenerator[H2ClientProtocol]:
         from twisted.internet import reactor
 
-        from scrapy.core.http2.protocol import H2ClientFactory  # noqa: PLC0415
+        from scrapy.core._http2.protocol import H2ClientFactory  # noqa: PLC0415
 
         client_options = optionsForClientTLS(
             hostname=self.host,
@@ -460,7 +460,7 @@ class TestHttps2ClientProtocol:
     def test_invalid_negotiated_protocol(
         self, server_port: int, client: H2ClientProtocol
     ) -> Generator[Deferred[Any], Any, None]:
-        with mock.patch("scrapy.core.http2.protocol.PROTOCOL_NAME", new=b"not-h2"):
+        with mock.patch("scrapy.core._http2.protocol.PROTOCOL_NAME", new=b"not-h2"):
             request = Request(url=self.get_url(server_port, "/status?n=200"))
             with pytest.raises(ResponseFailed):
                 yield make_request_dfd(client, request)
@@ -527,7 +527,7 @@ class TestHttps2ClientProtocol:
         expected_body: bytes,
         caplog: pytest.LogCaptureFixture,
     ) -> None:
-        with caplog.at_level("WARNING", "scrapy.core.http2.stream"):
+        with caplog.at_level("WARNING", "scrapy.core._http2.stream"):
             response = await make_request(client, request)
         assert response.status == 200
         assert response.body == expected_body
@@ -605,7 +605,7 @@ class TestHttps2ClientProtocol:
         def assert_inactive_stream(failure):
             assert failure.check(ResponseFailed) is not None
 
-            from scrapy.core.http2.stream import InactiveStreamClosed  # noqa: PLC0415
+            from scrapy.core._http2.stream import InactiveStreamClosed  # noqa: PLC0415
 
             assert any(
                 isinstance(e, InactiveStreamClosed) for e in failure.value.reasons
@@ -692,7 +692,7 @@ class TestHttps2ClientProtocol:
 
     @staticmethod
     async def _check_invalid_netloc(client: H2ClientProtocol, url: str) -> None:
-        from scrapy.core.http2.stream import InvalidHostname  # noqa: PLC0415
+        from scrapy.core._http2.stream import InvalidHostname  # noqa: PLC0415
 
         request = Request(url)
         with pytest.raises(InvalidHostname) as exc_info:
@@ -737,7 +737,7 @@ class TestHttps2ClientProtocol:
             yield make_request_dfd(client, request)
 
         for err in exc_info.value.reasons:
-            from scrapy.core.http2.protocol import H2ClientProtocol  # noqa: PLC0415
+            from scrapy.core._http2.protocol import H2ClientProtocol  # noqa: PLC0415
 
             if isinstance(err, DownloadTimeoutError):
                 assert (

tests/utils/bases/download_handlers_http.py

@@ -1513,6 +1513,12 @@ class TestMitmProxyBase(ABC):
         assert "Proxy Authentication Required" in log or "407" in log
 
 
+# Tests below are rerun on failure (see pytest_collection_modifyitems() in the
+# root conftest.py), so an attempt must give up soon enough for a rerun to be
+# cheap.
+REAL_WEBSITE_SETTINGS = {"DOWNLOAD_TIMEOUT": 30}
+
+
 class TestRealWebsiteBase(ABC):
     @property
     @abstractmethod
@@ -1537,7 +1543,9 @@ class TestRealWebsiteBase(ABC):
     async def get_dh(
         self, settings_dict: dict[str, Any] | None = None
     ) -> AsyncGenerator[DownloadHandlerProtocol]:
-        crawler = get_crawler(DefaultSpider, settings_dict)
+        crawler = get_crawler(
+            DefaultSpider, {**REAL_WEBSITE_SETTINGS, **(settings_dict or {})}
+        )
         crawler.spider = crawler._create_spider()
         dh = build_from_crawler(self.download_handler_cls, crawler)
         try:
@@ -1555,7 +1563,9 @@ class TestRealWebsiteBase(ABC):
 
     @coroutine_test
     async def test_download_with_spider(self) -> None:
-        crawler = get_crawler(SingleRequestSpider, self.settings_dict)
+        crawler = get_crawler(
+            SingleRequestSpider, {**REAL_WEBSITE_SETTINGS, **(self.settings_dict or {})}
+        )
         await maybe_deferred_to_future(
             crawler.crawl(seed=Request("https://books.toscrape.com/"))
         )

tox.ini

@@ -44,6 +44,7 @@ deps =
     pygments
     pytest
     pytest-cov >= 7.0.0
+    pytest-rerunfailures
     pytest-timeout
     pytest-xdist
     sybil >= 1.3.0  # https://github.com/cjw296/sybil/issues/20#issuecomment-605433422