Subdominio

Esta receta enruta requests a instancias Echo separadas según el host del request, de modo que cada subdominio tenga sus propias rutas y middleware. Las instancias se combinan con echo.NewVirtualHostHandler, que despacha por host name.

Servidor

package main

import (
  "context"
  "net/http"

  "github.com/labstack/echo/v5"
  "github.com/labstack/echo/v5/middleware"
)

func main() {
  // Hosts
  vHosts := make(map[string]*echo.Echo)

  //-----
  // API
  //-----

  api := echo.New()
  api.Use(middleware.RequestLogger())
  api.Use(middleware.Recover())

  vHosts["api.localhost:1323"] = api

  api.GET("/", func(c *echo.Context) error {
    return c.String(http.StatusOK, "API")
  })

  //------
  // Blog
  //------

  blog := echo.New()
  blog.Use(middleware.RequestLogger())
  blog.Use(middleware.Recover())

  vHosts["blog.localhost:1323"] = blog

  blog.GET("/", func(c *echo.Context) error {
    return c.String(http.StatusOK, "Blog")
  })

  //---------
  // Website
  //---------

  site := echo.New()
  site.Use(middleware.RequestLogger())
  site.Use(middleware.Recover())

  vHosts["localhost:1323"] = site

  site.GET("/", func(c *echo.Context) error {
    return c.String(http.StatusOK, "Website")
  })

  e := echo.NewVirtualHostHandler(vHosts)

  sc := echo.StartConfig{Address: ":1323"}
  if err := sc.Start(context.Background(), e); err != nil {
    e.Logger.Error("failed to start server", "error", err)
  }
}