The server pulls in group information for the resource request in Session 3.
服务器在会话3中再次为资源请求获取组信息。
If this is not a new session we should already have the group information stored in the session so we skip the remaining code.
如果这不是个新会话,那么我们应该已经把组信息存储在会话中了,这样我们就可以跳过余下的代码。
For example, to find the most common click trails through a portal, you could group all requests by their session and then derive the click trail for each session.
例如,若要找出通过门户的最常见点击路径,您可以按会话对所有请求分组,然后得出每个会话的点击路径。
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