ASP. NET MVC

The search engine should be the relationship between keywords and content, but all the network content has a URL address, which leads to the relationship between the three.

1) the content of different URLs is actually the same. For example, the articles in the Blog are reprinted with each other. The Search Engine wants to filter out other articles and only retain the original ones.

Global Error Handling:

1) Register HandleError Attribute in Application_Start as a Global Filter.

2) Compile the Event Response Function of the Error Event of the HttpApplication object.

3) use the Http Module to subscribe to Error events.