router.go

package router

import (
   "net/http"

   "github.com/99designs/gqlgen/graphql/handler"
   "github.com/99designs/gqlgen/graphql/playground"
   "github.com/labstack/echo/v4"
   "github.com/labstack/echo/v4/middleware"
)

// Path of route
const (
   QueryPath      = "/query"
   PlaygroundPath = "/playground"
)

// New creates route endpoint
func New(srv *handler.Server) *echo.Echo {
   e := echo.New()
   e.Use(middleware.Recover())
   e.Use(middleware.CORSWithConfig(middleware.CORSConfig{
      AllowOrigins: []string{"*"},
      AllowMethods: []string{http.MethodGet, http.MethodPost, http.MethodOptions},
      AllowHeaders: []string{echo.HeaderOrigin, echo.HeaderXRequestedWith, echo.HeaderContentType, echo.HeaderAccept, echo.HeaderAuthorization},
   }))

   {
      e.POST(QueryPath, echo.WrapHandler(srv))
      e.GET(PlaygroundPath, func(c echo.Context) error {
         playground.Handler("GraphQL", QueryPath).ServeHTTP(c.Response(), c.Request())
         return nil
      })
   }

   return e
}