Overview
The concept of navigation is no stranger to everyone. The most common is map navigation, which can guide users to their destination. There are also some "navigation", such as the hao123 website, which is used for Internet access.
IM software design also has the navigation module, the role of the module is similar to the above two types, but there are some differences. The navigation in IM software is mainly to "store the server access address; avoid writing dead URLs and adopt dynamic configuration ". The IM software must use an HTTP address, which is generally obtained from the navigation, rather than written to death.
The navigation is a set of XML. The following shows the navigation of an IM software.
Retrieval Mechanism
● When you log on for the first time, you do not have the access IP address of the server. You need to retrieve the navigation information again.
● In some cases where logon fails, you need to retrieve the navigation again.
● After successful logon, you still need to obtain the navigation for the next use.
In addition, the navigation also has version number control.