fix cors (#183)

* copy all headers from fake ResponseWriter to ResponseWriter

* add tests

* use our cors middleware instead cors by rs

* remove unused vendor and debugs

* fix when request is with not allowed method

root.go

@@ -10,7 +10,6 @@ import (
 	"github.com/nuveo/prest/config/router"
 	"github.com/nuveo/prest/controllers"
 	"github.com/nuveo/prest/middlewares"
-	"github.com/rs/cors"
 	"github.com/spf13/cobra"
 	"github.com/urfave/negroni"
 	// postgres driver for migrate
@@ -52,32 +51,20 @@ func Execute() {
 func app() {
 	n := cfgMiddleware.GetApp()
 	r := router.Get()
-
 	r.HandleFunc("/databases", controllers.GetDatabases).Methods("GET")
 	r.HandleFunc("/schemas", controllers.GetSchemas).Methods("GET")
 	r.HandleFunc("/tables", controllers.GetTables).Methods("GET")
 	r.HandleFunc("/_QUERIES/{queriesLocation}/{script}", controllers.ExecuteFromScripts)
 	r.HandleFunc("/{database}/{schema}", controllers.GetTablesByDatabaseAndSchema).Methods("GET")
-
 	crudRoutes := mux.NewRouter().PathPrefix("/").Subrouter().StrictSlash(true)
-
 	crudRoutes.HandleFunc("/{database}/{schema}/{table}", controllers.SelectFromTables).Methods("GET")
 	crudRoutes.HandleFunc("/{database}/{schema}/{table}", controllers.InsertInTables).Methods("POST")
 	crudRoutes.HandleFunc("/{database}/{schema}/{table}", controllers.DeleteFromTable).Methods("DELETE")
 	crudRoutes.HandleFunc("/{database}/{schema}/{table}", controllers.UpdateTable).Methods("PUT", "PATCH")
-
 	r.PathPrefix("/").Handler(negroni.New(
 		middlewares.AccessControl(),
 		negroni.Wrap(crudRoutes),
 	))
-
-	if config.PrestConf.CORSAllowOrigin != nil {
-		c := cors.New(cors.Options{
-			AllowedOrigins: config.PrestConf.CORSAllowOrigin,
-		})
-		n.Use(c)
-	}
-
 	n.UseHandler(r)
 	n.Run(fmt.Sprintf(":%v", config.PrestConf.HTTPPort))
 }