smooth-dl.py: improve getting the manifest of Clip elements

diff --git a/smooth-dl.py b/smooth-dl.py
index 39785a4..a496bc7 100755 (executable)
--- a/smooth-dl.py
+++ b/smooth-dl.py
@@ -130,13 +130,18 @@ def get_manifest(url, dest_dir):
     if version != "2":
         raise Exception('Only Smooth Streaming version 2 supported')
 
-    try:
-        # if some intermediate client Manifest is used, like in Rai Replay
-        clip = manifest.find("Clip")
-        manifest_url = clip.attrib["Url"]
-        manifest = download_file(manifest_url, None, None)
-    except AttributeError:
-        pass
+    # if some intermediate client Manifest is used, like in Rai Replay
+    # then get the final manifest
+    clip = manifest.find("Clip")
+    if clip is not None and "Url" in clip.attrib:
+        tmp_manifest_url = clip.attrib["Url"]
+        try:
+            tmp_manifest = download_file(tmp_manifest_url, None, None)
+            # set the new values only if the dowload succeded
+            manifest_url = tmp_manifest_url
+            manifest = tmp_manifest
+        except urllib2.HTTPError:
+            pass
 
     manifest_pattern = re.compile("/manifest$", re.IGNORECASE)
     base_url = manifest_pattern.sub("", manifest_url)