add helper method to text module

gallery_dl/text.py

@@ -28,6 +28,15 @@ def filename_from_url(url):
     except ValueError:
         return url
 
+def nameext_from_url(url, data=None):
+    """Extract the last part of an url and fill keywords of 'data' accordingly"""
+    if data is None:
+        data = {}
+    data["filename"] = unquote(filename_from_url(url))
+    data["name"], ext = os.path.splitext(data["filename"])
+    data["extension"] = ext[1:]
+    return data
+
 def clean_path_windows(path):
     """Remove illegal characters from a path-segment (Windows)"""
     try:

test/test_text.py

@@ -36,6 +36,22 @@ class TestText(unittest.TestCase):
         for case in cases:
             self.assertEqual(text.filename_from_url(case), result)
 
+    def test_nameext_from_url(self):
+        cases = (
+            "http://example.org/v2/filename.ext",
+            "http://example.org/v2/filename.ext?param=value#fragment",
+            "example.org/filename.ext",
+            "/filename.ext",
+            "filename.ext",
+        )
+        result = {
+            "filename" : "filename.ext",
+            "name"     : "filename",
+            "extension": "ext",
+        }
+        for case in cases:
+            self.assertEqual(text.nameext_from_url(case), result)
+
     def test_clean_path(self):
         cases = {
             "Hello World." : ("Hello World.", "Hello World."),