Fix #2890 — Ignore empty tags in HTML metadata reader

Kwpolska · Kwpolska · commit bc4ef229166d · 2017-08-24T16:59:35.000+02:00
Signed-off-by: Chris Warrick &lt;kwpolska@gmail.com&gt;
diff --git a/CHANGES.txt b/CHANGES.txt
@@ -1,6 +1,7 @@
 New in v7-maintenance
 =====================
 
+* Ignore empty tags in HTML metadata reader (Issue #2890)
 * Fix crash when compiling empty ``.html`` posts (Issue #2851)
 
 New in v7.8.9
diff --git a/nikola/plugins/compile/html.py b/nikola/plugins/compile/html.py
@@ -106,7 +106,7 @@ def read_metadata(self, post, file_metadata_regexp=None, unslugify_titles=False,
             # let other errors raise
             raise
         title_tag = doc.find('*//title')
-        if title_tag is not None:
+        if title_tag is not None and title_tag.text:
             metadata['title'] = title_tag.text
         meta_tags = doc.findall('*//meta')
         for tag in meta_tags:
@@ -115,6 +115,8 @@ def read_metadata(self, post, file_metadata_regexp=None, unslugify_titles=False,
                 continue
             elif k == 'keywords':
                 k = 'tags'
-            metadata[k] = tag.get('content', '')
+            content = tag.get('content')
+            if content:
+                metadata[k] = content
         map_metadata(metadata, 'html_metadata', self.site.config)
         return metadata
