add method to escape " from YAML frontmatter

rss_aggregator.py

@@ -14,7 +14,7 @@ from slugify import slugify
 from bs4 import BeautifulSoup
 import time
 import arrow
-
+from re import sub
 
 def write_etag(feed_name, feed_data):
     """
@@ -107,6 +107,28 @@ def create_frontmatter(entry):
 
     return frontmatter
 
+def sanitize_yaml (frontmatter):
+    """
+    Escapes any occurences of double quotes
+    in any of the frontmatter fields
+    See: https://docs.octoprint.org/en/master/configuration/yaml.html#interesting-data-types
+    """
+    for k, v in frontmatter.items():
+        if type(v) == type([]):
+            #some fields are lists
+            l = []
+            for i in v:
+                i = sub('"', '\\"', i)
+                l.append(i)
+            frontmatter[k] = l
+
+        else:
+            v = sub('"', '\\"', v)
+            frontmatter[k] = v
+
+    return frontmatter
+
+
 def create_post(post_dir, entry):
     """
     write hugo post based on RSS entry
@@ -124,11 +146,11 @@ def create_post(post_dir, entry):
     parsed_content = parse_posts(post_dir, post_content)
 
     with open(os.path.join(post_dir,'index.html'),'w') as f: #n.b. .html 
-        post = template.render(frontmatter=frontmatter, content=parsed_content)
+        post = template.render(frontmatter=sanitize_yaml(frontmatter), content=parsed_content)
         f.write(post)
         print('created post for', entry.title, '({})'.format(entry.link))
 
-def grab_media(post_directory, url, prefered_name):
+def grab_media(post_directory, url, prefered_name=None):
     """
     download media linked in post to have local copy
     if download succeeds return new local path otherwise return url
@@ -217,7 +239,7 @@ def create_opds_post(post_dir, entry):
             summary = ""
 
     with open(os.path.join(post_dir,'index.md'),'w') as f:
-        post = template.render(frontmatter=frontmatter, content=summary)
+        post = template.render(frontmatter=sanitize_yaml(frontmatter), content=summary)
         f.write(post)
         print('created post for Book', entry.title)