Handle misssed errors for encoding and decoding feeds

cmd/feed/rss.go

@@ -26,27 +26,32 @@ func NewFeed(title, link, desc string) *Feed {
 func SaveFeed(feed *Feed, filename string) error {
 	file, err := os.Create(filename)
 	if err != nil {
-		return fmt.Errorf("error cmd/feed/rss.go WriteFeed os.Create(): %v", err)
+		return fmt.Errorf("error cmd/feed/rss.go SaveFeed os.Create(): %v", err)
 	}
 	defer file.Close()
 
 	encoder := gob.NewEncoder(file)
-	encoder.Encode(feed)
+	err = encoder.Encode(feed)
+	if err != nil {
+		return fmt.Errorf("error cmd/feed/rss.go SaveFeed encoder.Encode(): %v", err)
+	}
 
 	return nil
 }
 
 func OpenFeed(filename string) (*Feed, error) {
-	var feed *Feed
-
 	file, err := os.Open(filename)
 	if err != nil {
-		return nil, fmt.Errorf("error cmd/feed/rss.go ReadFeed os.Open(): %v", err)
+		return nil, fmt.Errorf("error cmd/feed/rss.go OpenFeed os.Open(): %v", err)
 	}
 	defer file.Close()
 
+	feed := &Feed{}
 	decoder := gob.NewDecoder(file)
-	decoder.Decode(feed)
+	err = decoder.Decode(feed)
+	if err != nil {
+		return nil, fmt.Errorf("error cmd/feed/rss.go OpenFeed decoder.Decode(): %v", err)
+	}
 
 	return feed, nil
 }