policy for polling rss
问题 I have an application that polls several rss sources on the web. What is the etiquette when polling other's web servers. How frequently to poll, etc? What are the best practices? 回答1: Make use of HTTP cache. Send Etag and LastModified headers. Recognize 304 Not modified response. This way you can save a lot of bandwidth. Additionally some scripts recognize the LastModified header and return only partial contents (ie. only the two or three newest items instead of all 30 or so). Don’t poll RSS