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WebSocket transport for GraphQL subscriptions
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Latest commit 40b8cf7 Nov 29, 2018

README.md

graphql-transport-ws

(Work in progress!)

A Go package that leverages WebSockets to transport GraphQL subscriptions, queries and mutations implementing the Apollo@v0.9.4 protocol

Use with graph-gophers/graphql-go

To use this library with github.com/graph-gophers/graphql-go you can wrap the relay handler it provides the following way:

package main

import (
	"fmt"
	"net/http"

	graphql "github.com/graph-gophers/graphql-go"
	"github.com/graph-gophers/graphql-go/relay"
	"github.com/graph-gophers/graphql-transport-ws/graphqlws"
)

const schema = `
	schema {
		subscription: Subscription
	}

	type Subscription {
		...
	}
`

type resolver struct {
	// ...
}

func main() {
	// init graphQL schema
	s, err := graphql.ParseSchema(schema, &resolver{})
	if err != nil {
		panic(err)
	}

	// graphQL handler
	graphQLHandler := graphqlws.NewHandlerFunc(s, &relay.Handler{Schema: s})
	http.HandleFunc("/graphql", graphQLHandler)

	// start HTTP server
	if err := http.ListenAndServe(fmt.Sprintf(":%d", 8080), nil); err != nil {
		panic(err)
	}
}

For a more in depth example see this repo.

Client

Check apollographql/subscription-transport-ws for details on how to use WebSockets on the client side.

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