Skip requests guaranteed to fail

licensecheck/packageinforesolver.py

@@ -7,6 +7,7 @@
 import re
 from concurrent.futures import ThreadPoolExecutor
 from email.message import Message
+from functools import lru_cache
 from importlib import metadata
 from importlib.metadata._meta import PackageMetadata
 from pathlib import Path
@@ -113,6 +114,7 @@ def _get_package_info(self, package: Requirement) -> PackageInfo:
 		return pkg_info
 
 
+@lru_cache(maxsize=128)
 def normalize_license(lice: str) -> str:
 	licensing = Licensing()
 	parsed = None
@@ -182,9 +184,11 @@ def __init__(self, pypi_api: str, package: PackageInfo) -> None:
 	def lazy_fetch(self) -> None:
 		if self.resp is None:
 			# Attempt to get versioned info first
-			rc, raw_resp = self.make_req(
-				url=f"{self.pypi_api_pypi}{self.package.name}/{self.package.version}/json"
-			)
+			rc, raw_resp = -1, {}
+			if self.package.version is not None:
+				rc, raw_resp = self.make_req(
+					url=f"{self.pypi_api_pypi}{self.package.name}/{self.package.version}/json"
+				)
 			# Otherwise just get the latest
 			if rc != HTTP_OK:
 				rc, raw_resp = self.make_req(url=f"{self.pypi_api_pypi}/{self.package.name}/json")

tests/test_packageinfo.py

@@ -67,6 +67,28 @@ def test_getPackagePypiLocalNotFound() -> None:
 	assert pkg.get_size() is None
 
 
+def test_unpinned_remote_package_skips_versioned_request(
+	monkeypatch: pytest.MonkeyPatch,
+) -> None:
+	pkg = RemotePackageInfo("https://pypi.org", aux_packageinfo("sample"))
+	requested_urls: list[str] = []
+
+	def make_req(_self: RemotePackageInfo, url: str) -> tuple[int, dict[str, object]]:
+		requested_urls.append(url)
+		return 200, {}
+
+	class ProjectResponseStub:
+		@staticmethod
+		def model_validate(data: dict[str, object]) -> dict[str, object]:
+			return data
+
+	monkeypatch.setattr("licensecheck.packageinforesolver.RemotePackageInfo.make_req", make_req)
+	monkeypatch.setattr("licensecheck.packageinforesolver.ProjectResponse", ProjectResponseStub)
+	pkg.lazy_fetch()
+
+	assert requested_urls == ["https://pypi.org/pypi/sample/json"]
+
+
 def test_getPackages(package_info_manager: PackageInfoManager) -> None:
 	package_info_manager.reqs = {aux_packageinfo("requests")}
 	packages = package_info_manager.getPackages()