?Feed 是一種數(shù)據(jù)格式,用于給(訂閱的)用戶提供持續(xù)更新的內(nèi)容
?看似是 Push 內(nèi)容給用戶的形式澎现,實(shí)質(zhì)是用戶自己主動(dòng)選擇多個(gè)訂閱源,展示內(nèi)容匯總的聚合器(典型代表是RSS)主動(dòng)向服務(wù)器請(qǐng)求內(nèi)容,再以時(shí)間順序呈現(xiàn)到聚合器株灸,是一種典型的 Pull Technology(定義如下)
Pull coding or client pull is a style of network communication where the initial request for data originates from the client, and then is responded to by the server.