#1559 :Add tests for sitemap parsing and URL normalization in AsyncUrlSeeder

crawl4ai/async_url_seeder.py

@@ -845,6 +845,15 @@ class AsyncUrlSeeder:
             return
 
         data = gzip.decompress(r.content) if url.endswith(".gz") else r.content
+        base_url = str(r.url)
+
+        def _normalize_loc(raw: Optional[str]) -> Optional[str]:
+            if not raw:
+                return None
+            normalized = urljoin(base_url, raw.strip())
+            if not normalized:
+                return None
+            return normalized
 
         # Detect if this is a sitemap index by checking for <sitemapindex> or presence of <sitemap> elements
         is_sitemap_index = False
@@ -857,25 +866,42 @@ class AsyncUrlSeeder:
                 # Use XML parser for sitemaps, not HTML parser
                 parser = etree.XMLParser(recover=True)
                 root = etree.fromstring(data, parser=parser)
+                # Namespace-agnostic lookups using local-name() so we honor custom or missing namespaces
+                sitemap_loc_nodes = root.xpath("//*[local-name()='sitemap']/*[local-name()='loc']")
+                url_loc_nodes = root.xpath("//*[local-name()='url']/*[local-name()='loc']")
 
-                # Define namespace for sitemap
+                self._log(
-                ns = {'s': 'http://www.sitemaps.org/schemas/sitemap/0.9'}
+                    "debug",
+                    "Parsed sitemap {url}: {sitemap_count} sitemap entries, {url_count} url entries discovered",
+                    params={
+                        "url": url,
+                        "sitemap_count": len(sitemap_loc_nodes),
+                        "url_count": len(url_loc_nodes),
+                    },
+                    tag="URL_SEED",
+                )
 
                 # Check for sitemap index entries
-                sitemap_locs = root.xpath('//s:sitemap/s:loc', namespaces=ns)
+                if sitemap_loc_nodes:
-                if sitemap_locs:
                     is_sitemap_index = True
-                    for sitemap_elem in sitemap_locs:
+                    for sitemap_elem in sitemap_loc_nodes:
-                        loc = sitemap_elem.text.strip() if sitemap_elem.text else ""
+                        loc = _normalize_loc(sitemap_elem.text)
                         if loc:
                             sub_sitemaps.append(loc)
 
                 # If not a sitemap index, get regular URLs
                 if not is_sitemap_index:
-                    for loc_elem in root.xpath('//s:url/s:loc', namespaces=ns):
+                    for loc_elem in url_loc_nodes:
-                        loc = loc_elem.text.strip() if loc_elem.text else ""
+                        loc = _normalize_loc(loc_elem.text)
                         if loc:
                             regular_urls.append(loc)
+                    if not regular_urls:
+                        self._log(
+                            "warning",
+                            "No <loc> entries found inside <url> tags for sitemap {url}. The sitemap might be empty or use an unexpected structure.",
+                            params={"url": url},
+                            tag="URL_SEED",
+                        )
             except Exception as e:
                 self._log("error", "LXML parsing error for sitemap {url}: {error}",
                           params={"url": url, "error": str(e)}, tag="URL_SEED")
@@ -892,19 +918,39 @@ class AsyncUrlSeeder:
 
                 # Check for sitemap index entries
                 sitemaps = root.findall('.//sitemap')
+                url_entries = root.findall('.//url')
+                self._log(
+                    "debug",
+                    "ElementTree parsed sitemap {url}: {sitemap_count} sitemap entries, {url_count} url entries discovered",
+                    params={
+                        "url": url,
+                        "sitemap_count": len(sitemaps),
+                        "url_count": len(url_entries),
+                    },
+                    tag="URL_SEED",
+                )
                 if sitemaps:
                     is_sitemap_index = True
                     for sitemap in sitemaps:
                         loc_elem = sitemap.find('loc')
-                        if loc_elem is not None and loc_elem.text:
+                        loc = _normalize_loc(loc_elem.text if loc_elem is not None else None)
-                            sub_sitemaps.append(loc_elem.text.strip())
+                        if loc:
+                            sub_sitemaps.append(loc)
 
                 # If not a sitemap index, get regular URLs
                 if not is_sitemap_index:
-                    for url_elem in root.findall('.//url'):
+                    for url_elem in url_entries:
                         loc_elem = url_elem.find('loc')
-                        if loc_elem is not None and loc_elem.text:
+                        loc = _normalize_loc(loc_elem.text if loc_elem is not None else None)
-                            regular_urls.append(loc_elem.text.strip())
+                        if loc:
+                            regular_urls.append(loc)
+                    if not regular_urls:
+                        self._log(
+                            "warning",
+                            "No <loc> entries found inside <url> tags for sitemap {url}. The sitemap might be empty or use an unexpected structure.",
+                            params={"url": url},
+                            tag="URL_SEED",
+                        )
             except Exception as e:
                 self._log("error", "ElementTree parsing error for sitemap {url}: {error}",
                           params={"url": url, "error": str(e)}, tag="URL_SEED")

tests/unit/test_sitemap_namespace_parsing.py

@@ -0,0 +1,134 @@
+import sys
+from types import SimpleNamespace
+
+import pytest
+
+# Provide a lightweight stub for rank_bm25 before importing the seeder to avoid
+# optional dependency issues (e.g., incompatible wheels in CI).
+class _FakeBM25:
+    def __init__(self, corpus):
+        self._scores = [1.0] * len(corpus)
+
+    def get_scores(self, tokens):
+        return self._scores
+
+
+sys.modules.setdefault("rank_bm25", SimpleNamespace(BM25Okapi=_FakeBM25))
+
+from crawl4ai.async_url_seeder import AsyncUrlSeeder
+
+
+class DummyResponse:
+    def __init__(self, request_url: str, text: str):
+        self.status_code = 200
+        self._content = text.encode("utf-8")
+        self.url = request_url
+
+    def raise_for_status(self):
+        return None
+
+    @property
+    def content(self):
+        return self._content
+
+    @property
+    def text(self):
+        return self._content.decode("utf-8")
+
+
+class DummyAsyncClient:
+    def __init__(self, response_map):
+        self._responses = response_map
+
+    async def get(self, url, **kwargs):
+        payload = self._responses[url]
+        if callable(payload):
+            payload = payload()
+        return DummyResponse(url, payload)
+
+
+@pytest.mark.asyncio
+async def test_iter_sitemap_handles_namespace_less_sitemaps():
+    xml = """<?xml version="1.0"?>
+    <urlset>
+        <url><loc>https://example.com/a</loc></url>
+        <url><loc>https://example.com/b</loc></url>
+    </urlset>
+    """
+    seeder = AsyncUrlSeeder(client=DummyAsyncClient({"https://example.com/sitemap.xml": xml}))
+
+    urls = []
+    async for u in seeder._iter_sitemap("https://example.com/sitemap.xml"):
+        urls.append(u)
+
+    assert urls == ["https://example.com/a", "https://example.com/b"]
+
+
+@pytest.mark.asyncio
+async def test_iter_sitemap_handles_custom_namespace():
+    xml = """<?xml version="1.0"?>
+    <urlset xmlns="https://custom.namespace/schema">
+        <url><loc>https://example.com/ns</loc></url>
+    </urlset>
+    """
+    seeder = AsyncUrlSeeder(client=DummyAsyncClient({"https://example.com/ns-sitemap.xml": xml}))
+
+    urls = []
+    async for u in seeder._iter_sitemap("https://example.com/ns-sitemap.xml"):
+        urls.append(u)
+
+    assert urls == ["https://example.com/ns"]
+
+
+@pytest.mark.asyncio
+async def test_iter_sitemap_handles_namespace_index_and_children():
+    index_xml = """<?xml version="1.0"?>
+    <sitemapindex xmlns="http://another.example/ns">
+        <sitemap>
+            <loc>https://example.com/child-1.xml</loc>
+        </sitemap>
+        <sitemap>
+            <loc>https://example.com/child-2.xml</loc>
+        </sitemap>
+    </sitemapindex>
+    """
+    child_xml = """<?xml version="1.0"?>
+    <urlset xmlns="http://irrelevant">
+        <url><loc>https://example.com/page-{n}</loc></url>
+    </urlset>
+    """
+    responses = {
+        "https://example.com/index.xml": index_xml,
+        "https://example.com/child-1.xml": child_xml.format(n=1),
+        "https://example.com/child-2.xml": child_xml.format(n=2),
+    }
+    seeder = AsyncUrlSeeder(client=DummyAsyncClient(responses))
+
+    urls = []
+    async for u in seeder._iter_sitemap("https://example.com/index.xml"):
+        urls.append(u)
+
+    assert sorted(urls) == [
+        "https://example.com/page-1",
+        "https://example.com/page-2",
+    ]
+
+
+@pytest.mark.asyncio
+async def test_iter_sitemap_normalizes_relative_locations():
+    xml = """<?xml version="1.0"?>
+    <urlset>
+        <url><loc>/relative-path</loc></url>
+        <url><loc>https://example.com/absolute</loc></url>
+    </urlset>
+    """
+    seeder = AsyncUrlSeeder(client=DummyAsyncClient({"https://example.com/sitemap.xml": xml}))
+
+    urls = []
+    async for u in seeder._iter_sitemap("https://example.com/sitemap.xml"):
+        urls.append(u)
+
+    assert urls == [
+        "https://example.com/relative-path",
+        "https://example.com/absolute",
+    ]