Options to control which user defined metadata fields are rendered in /opds

src/calibre/srv/handler.py

@@ -89,6 +89,13 @@ class Context(object):
         self.testing = testing
         self.lock = Lock()
         self.user_manager = UserManager(opts.userdb)
+        self.ignored_fields = frozenset(filter(None, (x.strip() for x in (opts.ignored_fields or '').split(','))))
+        self.displayed_fields = frozenset(filter(None, (x.strip() for x in (opts.displayed_fields or '').split(','))))
+
+    def is_field_displayable(self, field):
+        if self.displayed_fields and field not in self.displayed_fields:
+            return False
+        return field not in self.ignored_fields
 
     def init_session(self, endpoint, data):
         pass

src/calibre/srv/opds.py

@@ -181,7 +181,7 @@ def ACQUISITION_ENTRY(book_id, updated, request_context):
         extra.append(_('SERIES: %(series)s [%(sidx)s]<br />')%
                 dict(series=xml(mi.series),
                 sidx=fmt_sidx(float(mi.series_index))))
-    for key in field_metadata.ignorable_field_keys():
+    for key in filter(request_context.ctx.is_field_displayable, field_metadata.ignorable_field_keys()):
         name, val = mi.format_field(key)
         if val:
             fm = field_metadata[key]

src/calibre/srv/opts.py

@@ -124,9 +124,21 @@ raw_options = (
     _('Set the HTTP authentication mode used by the server. Set to "basic" is you are'
     ' putting this server behind an SSL proxy. Otherwise, leave it as "auto", which'
     ' will use "basic" if SSL is configured otherwise it will use "digest".'),
+
+    _('Ignored user-defined metadata fields'),
+    'ignored_fields', None,
+    _('Comma separated list of user-defined metadata fields that will not be displayed'
+      ' by the content server in the /opds and /mobile views.'),
+
+    _('Only display user-defined fields'),
+    'displayed_fields', None,
+    _('Comma separated list of user-defined metadata fields that will be displayed'
+      ' by the content server in the /opds and /mobile views. If you specify this'
+      ' option, any fields not in this list will not be displayed.'),
+
+
 )
 assert len(raw_options) % 4 == 0
-# TODO: Mark these strings for translation, once you finalize the option set
 
 options = []