HTTP

While not unique to RSS, given the high volume of traffic RSS feeds tend to generate, it is helpful to review a number of HTTP concepts:

• Status codes
  
  
  • 301 permanent redirect
    
    
  • 410 gone
    
    
• Headers
  
  
  • gzip-compressed
    
    
  • If-None-Match/Etag
    
    
  • If-Modified-Since/Last-Modified