## 子域名
`server.go`
```go
package main
import (
"net/http"
"github.com/labstack/echo"
"github.com/labstack/echo/middleware"
)
type (
Host struct {
Echo *echo.Echo
}
)
func main() {
// Hosts
hosts := make(map[string]*Host)
//-----
// API
//-----
api := echo.New()
api.Use(middleware.Logger())
api.Use(middleware.Recover())
hosts["api.localhost:1323"] = &Host{api}
api.GET("/", func(c echo.Context) error {
return c.String(http.StatusOK, "API")
})
//------
// Blog
//------
blog := echo.New()
blog.Use(middleware.Logger())
blog.Use(middleware.Recover())
hosts["blog.localhost:1323"] = &Host{blog}
blog.GET("/", func(c echo.Context) error {
return c.String(http.StatusOK, "Blog")
})
//---------
// Website
//---------
site := echo.New()
site.Use(middleware.Logger())
site.Use(middleware.Recover())
hosts["localhost:1323"] = &Host{site}
site.GET("/", func(c echo.Context) error {
return c.String(http.StatusOK, "Website")
})
// Server
e := echo.New()
e.Any("/*", func(c echo.Context) (err error) {
req := c.Request()
res := c.Response()
host := hosts[req.Host]
if host == nil {
err = echo.ErrNotFound
} else {
host.Echo.ServeHTTP(res, req)
}
return
})
e.Logger.Fatal(e.Start(":1323"))
}
```
