wsgi.py 文件源码

def get_package_loader(self, package, package_path):
        from pkg_resources import DefaultProvider, ResourceManager, \
            get_provider
        loadtime = datetime.utcnow()
        provider = get_provider(package)
        manager = ResourceManager()
        filesystem_bound = isinstance(provider, DefaultProvider)

        def loader(path):
            if path is None:
                return None, None
            path = posixpath.join(package_path, path)
            if not provider.has_resource(path):
                return None, None
            basename = posixpath.basename(path)
            if filesystem_bound:
                return basename, self._opener(
                    provider.get_resource_filename(manager, path))
            return basename, lambda: (
                provider.get_resource_stream(manager, path),
                loadtime,
                0
            )
        return loader