When I tried to setup a Go web server with GraphQL I used this as template. It is basically a combo of gin and 99designs/gqlgen.
When I create a basic gqlgen server based on net/http package, the declaration of GraphQL subscriptions work as expected.
package main
import (
"log"
"net/http"
"os"
"github.com/99designs/gqlgen/graphql/handler"
"github.com/99designs/gqlgen/graphql/playground"
"github.com/jawil003/gqlgen/graph"
"github.com/jawil003/gqlgen/graph/generated"
)
const defaultPort = "8080"
func main() {
port := os.Getenv("PORT")
if port == "" {
port = defaultPort
}
srv := handler.NewDefaultServer(generated.NewExecutableSchema(generated.Config{Resolvers: &graph.Resolver{}}))
http.Handle("/", playground.Handler("GraphQL playground", "/query"))
http.Handle("/query", srv)
log.Printf("connect to http://localhost:%s/ for GraphQL playground", port)
log.Fatal(http.ListenAndServe(":"+port, nil))
}
But when I add gin, like this:
package main
import (
"github.com/gin-gonic/gin"
"github.com/jawil003/gqlgen-todos/graph"
"github.com/jawil003/gqlgen-todos/graph/generated"
"github.com/99designs/gqlgen/graphql/handler"
"github.com/99designs/gqlgen/graphql/playground"
)
// Defining the Graphql handler
func graphqlHandler() gin.HandlerFunc {
// NewExecutableSchema and Config are in the generated.go file
// Resolver is in the resolver.go file
h := handler.NewDefaultServer(generated.NewExecutableSchema(generated.Config{Resolvers: &graph.Resolver{}}))
return func(c *gin.Context) {
h.ServeHTTP(c.Writer, c.Request)
}
}
// Defining the Playground handler
func playgroundHandler() gin.HandlerFunc {
h := playground.Handler("GraphQL", "/query")
return func(c *gin.Context) {
h.ServeHTTP(c.Writer, c.Request)
}
}
func main() {
// Setting up Gin
r := gin.Default()
r.POST("/query", graphqlHandler())
r.GET("/", playgroundHandler())
r.Run()
}
I get this issue:
{ "error": "Could not connect to websocket endpoint ws://localhost:8080/query. Please check if the endpoint url is correct." }
Is there any known solution to make gin work with graphql subscriptions?
