From 0a152764fb5aac7fc5cf575c63155a3374caca7b Mon Sep 17 00:00:00 2001
From: Diogo Castro <diogo.neves.castro@gmail.com>
Date: Sun, 21 Jun 2026 23:01:17 -0300
Subject: [PATCH] fix: Addressing feedbacks, changing error message, and adding
 tests

---
 scrapy/downloadermiddlewares/offsite.py    | 14 ++---
 tests/test_downloadermiddleware_offsite.py | 73 +++++++++++++++++++---
 2 files changed, 72 insertions(+), 15 deletions(-)

diff --git a/scrapy/downloadermiddlewares/offsite.py b/scrapy/downloadermiddlewares/offsite.py
index ea2c2f030..fc9f35a66 100644
--- a/scrapy/downloadermiddlewares/offsite.py
+++ b/scrapy/downloadermiddlewares/offsite.py
@@ -49,12 +49,12 @@ class OffsiteMiddleware:
                 {"error": exc},
                 extra={"spider": spider},
             )
-            if self.crawler.engine:
-                _schedule_coro(
-                    self.crawler.engine.close_spider_async(
-                        reason="invalid_domain_configuration"
-                    )
+            assert self.crawler.engine
+            _schedule_coro(
+                self.crawler.engine.close_spider_async(
+                    reason="invalid_domain_configuration"
                 )
+            )
 
     def request_scheduled(self, request: Request, spider: Spider) -> None:
         self.process_request(request)
@@ -110,12 +110,12 @@ class OffsiteMiddleware:
             if url_pattern.match(domain):
                 raise ValueError(
                     f"{domains_type} accepts only domains, not URLs. "
-                    f"Ignoring URL entry {domain} in {domains_type}."
+                    f"Got URL entry {domain} in {domains_type}."
                 )
             if port_pattern.search(domain):
                 raise ValueError(
                     f"{domains_type} accepts only domains without ports. "
-                    f"Ignoring entry {domain} in {domains_type}."
+                    f"Got entry {domain} in {domains_type}."
                 )
             valid_domains.append(re.escape(domain))
         return valid_domains
diff --git a/tests/test_downloadermiddleware_offsite.py b/tests/test_downloadermiddleware_offsite.py
index 0d7e8982b..20172c02c 100644
--- a/tests/test_downloadermiddleware_offsite.py
+++ b/tests/test_downloadermiddleware_offsite.py
@@ -116,12 +116,23 @@ def test_process_request_no_allowed_domains(value):
     assert mw.process_request(request) is None
 
 
-def test_process_request_invalid_domains(caplog):
+@pytest.mark.parametrize(
+    "allowed_domains",
+    [
+        ["a.example", None],
+        ["a.example", "http://b.example"],
+        ["a.example", "c.example:8080"],
+    ],
+)
+def test_process_request_invalid_domains(allowed_domains, caplog):
     crawler = get_crawler(Spider)
-    allowed_domains = ["a.example", None, "http:////b.example", "//c.example"]
     crawler.spider = crawler._create_spider(name="a", allowed_domains=allowed_domains)
     mw = OffsiteMiddleware.from_crawler(crawler)
-    with caplog.at_level(logging.ERROR):
+    crawler.engine = AsyncMock()
+    with (
+        patch("scrapy.downloadermiddlewares.offsite._schedule_coro"),
+        caplog.at_level(logging.ERROR),
+    ):
         mw.spider_opened(crawler.spider)
     assert "Invalid domain configuration" in caplog.text
 
@@ -217,12 +228,23 @@ def test_request_scheduled_no_allowed_domains(value):
     assert mw.request_scheduled(request, crawler.spider) is None
 
 
-def test_request_scheduled_invalid_domains(caplog):
+@pytest.mark.parametrize(
+    "allowed_domains",
+    [
+        ["a.example", None],
+        ["a.example", "http://b.example"],
+        ["a.example", "c.example:8080"],
+    ],
+)
+def test_request_scheduled_invalid_domains(allowed_domains, caplog):
     crawler = get_crawler(Spider)
-    allowed_domains = ["a.example", None, "http:////b.example", "//c.example"]
     crawler.spider = crawler._create_spider(name="a", allowed_domains=allowed_domains)
     mw = OffsiteMiddleware.from_crawler(crawler)
-    with caplog.at_level(logging.ERROR):
+    crawler.engine = AsyncMock()
+    with (
+        patch("scrapy.downloadermiddlewares.offsite._schedule_coro"),
+        caplog.at_level(logging.ERROR),
+    ):
         mw.spider_opened(crawler.spider)
     assert "Invalid domain configuration" in caplog.text
 
@@ -325,7 +347,11 @@ def test_process_request_invalid_disallowed_domains(disallowed_domains, caplog):
     )
 
     mw = OffsiteMiddleware.from_crawler(crawler)
-    with caplog.at_level(logging.ERROR):
+    crawler.engine = AsyncMock()
+    with (
+        patch("scrapy.downloadermiddlewares.offsite._schedule_coro"),
+        caplog.at_level(logging.ERROR),
+    ):
         mw.spider_opened(crawler.spider)
     assert "Invalid domain configuration" in caplog.text
 
@@ -430,6 +456,37 @@ def test_request_scheduled_invalid_disallowed_domains(disallowed_domains, caplog
     )
 
     mw = OffsiteMiddleware.from_crawler(crawler)
-    with caplog.at_level(logging.ERROR):
+    crawler.engine = AsyncMock()
+    with (
+        patch("scrapy.downloadermiddlewares.offsite._schedule_coro"),
+        caplog.at_level(logging.ERROR),
+    ):
         mw.spider_opened(crawler.spider)
     assert "Invalid domain configuration" in caplog.text
+
+
+@pytest.mark.parametrize(
+    ("url", "filtered"),
+    [
+        ("http://example.com/page", False),
+        ("http://sub.example.com/page", False),
+        ("http://ads.example.com/page", True),
+        ("http://sub.ads.example.com/page", True),
+        ("http://other.com/page", True),
+    ],
+)
+def test_process_request_allowed_and_disallowed_domains(url, filtered):
+    crawler = get_crawler(Spider)
+    crawler.spider = crawler._create_spider(
+        name="a",
+        allowed_domains=["example.com"],
+        disallowed_domains=["ads.example.com"],
+    )
+    mw = OffsiteMiddleware.from_crawler(crawler)
+    mw.spider_opened(crawler.spider)
+    request = Request(url)
+    if filtered:
+        with pytest.raises(IgnoreRequest):
+            mw.process_request(request)
+    else:
+        assert mw.process_request(request) is None