echo/website/content/guide/migrating.md

title	menu
Migrating	side parent weight guide 2

Migrating from v1

Change log

• Good news, 85% of the API remains the same.
• Engine interface to abstract HTTP server implementation, allowing us to use HTTP servers beyond Go standard library. It currently supports standard HTTP server and FastHTTP.
• Context, Request and Response are converted to interfaces. More...
• Handler signature is changed to func (c echo.Context) error.
• Moved API's for serving static files into middleware.
  • Echo#Index
  • Echo#Favicon
  • Echo#Static
  • Echo#ServeDir
  • Echo#ServeFile
• Dropped auto wrapping of handler and middleware to enforce compile time check.
• Handler only accepts Echo#Handler interface.
• Middleware only accepts Echo#Middleware interface.
• Echo#HandlerFunc adapter to use ordinary functions as handlers.
• Echo#MiddlewareFunc adapter to use ordinary functions as middleware.
• Middleware is run before hitting the router, which doesn't require Echo#Hook API as it can be achieved via middleware.
• Ability to define middleware at route level.
• Echo#HTTPError exposed it's fields Code and Message.

How?

Quite easy, browse through recipes freshly converted to v2.