What is a gsp file?

A .gsp file is a Groovy Server Pages file, which is a template file used in the Grails web application framework. GSP files allow developers to create dynamic web pages using a mix of HTML and Groovy code.

Some key points about GSP files include:

1. GSP files typically have a .gsp extension and are stored in the views directory of a Grails application.
2. GSP files can include static HTML content as well as dynamic content generated by embedded Groovy code.
3. GSP files can also include Grails tags and custom tags to generate dynamic content and interact with server-side data.
4. GSP files are processed by the Grails framework at runtime to generate HTML output that is sent to the client's web browser.
5. GSP files are a key component of the Model-View-Controller (MVC) architecture used in Grails to separate the presentation layer from the business logic and data access layers of an application.

Overall, GSP files are a powerful tool for building dynamic web applications in Grails, allowing developers to create rich, interactive user interfaces with a combination of HTML and Groovy code.