Crawling feeds

Importing RSS items into the database is similar to importing feeds, except that as an aggregator, Hello World will need to crawl the feeds periodically to fetch any updated items. The crawler will ignore any feeds which had problems the last time they were fetched. It will also tag each item as it is fetched so users can browse through items by category.

Refer to these sections

• Fetching feeds to crawl
• Crawling feeds
• Tagging items
• Running the import
• Importing in a separate thread
• Browsing items
• Customizing how items are shown

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