subscriptionEndpoint and gin integration.

[frederikhors]

I'm trying to use gqlgen with gin (https://github.com/gin-gonic/gin).

I'm using the code below but there is a question about the subscription endpoint.

package server

import (
	"myProject/graphql"
	"github.com/99designs/gqlgen/handler"
	"github.com/gin-gonic/gin"
)

func Start() {
	r := gin.Default()

	r.GET("/query", gin.WrapH(handler.Playground("GraphQL playground", "/api")))
	r.GET("/api", gin.WrapH(handler.GraphQL(graphql.NewExecutableSchema(graphql.Config{Resolvers: &graphql.Resolver{}}))))
	r.POST("/api", gin.WrapH(handler.GraphQL(graphql.NewExecutableSchema(graphql.Config{Resolvers: &graphql.Resolver{}}))))

	r.Run()
}

As you can see I need to repeat the lines:

r.GET("/api", gin.WrapH(handler.GraphQL(graphql.NewExecutableSchema(graphql.Config{Resolvers: &graphql.Resolver{}}))))
r.POST("/api", gin.WrapH(handler.GraphQL(graphql.NewExecutableSchema(graphql.Config{Resolvers: &graphql.Resolver{}}))))

Is this correct?

Is there a way to have two separate handlers: one for graphql engine and one for subscriptions engine?

Also because in the future I'll need two separate endpoint. And from what I can see here:

gqlgen/handler/playground.go

Lines 25 to 38 in 4bda3bc

	<script type="text/javascript">
	window.addEventListener('load', function (event) {
	const root = document.getElementById('root');
	root.classList.add('playgroundIn');
	const wsProto = location.protocol == 'https:' ? 'wss:' : 'ws:'
	GraphQLPlayground.init(root, {
	endpoint: location.protocol + '//' + location.host + '{{.endpoint}}',
	subscriptionsEndpoint: wsProto + '//' + location.host + '{{.endpoint }}',
	settings: {
	'request.credentials': 'same-origin'
	}
	})
	})
	</script>

Today there isn't a way to change the default Playground subscriptionEndpoint?

Maybe a config like this below?

r.GET("/query", gin.WrapH(handler.Playground("GraphQL playground", "/api", "/subscriptions")))

[vektah]

You probably want to create the handler once and pass the same instance to all of them, otherwise you making copies of a bunch of internal state like the query cache.

gql := gin.WrapH(handler.GraphQL(graphql.NewExecutableSchema(graphql.Config{Resolvers: &graphql.Resolver{}})))

r.GET("/api", gql)
r.POST("/api", gql)

Why do you need to split the subscription endpoint out?