go get -u github.com/gqlengine/gqlengine

package mainimport (  "net/http"  "github.com/gqlengine/gqlengine")// MyInfo 定义了业务的数据结构type MyInfo struct {  gqlengine.IsGraphQLObject `gqlDesc:"my info"` // gqlDesc用于生成描述信息    MyStringField string // 定义一个字段，gqlengine会根据golang的基本类型自动匹配到graphql类型   MyIntField 	  int `gqlRequired:"true"`  // gqlRequired用于标记该字段是必备非空字段}// MySimpleQuery 是业务的代码的具体实现func MySimpleQuery() (MyInfo, error) {  panic("not implemented")}func main() {  engine := gqlengine.NewEngine(gqlengine.Options{	    Tracing: true, // 使能GraphQL调用链路分析功能  })    engine.NewQuery(MySimpleQuery) // 务必注册你的接口！！！    // 初始化engine  if err := engine.Init(); err != nil {    panic(err)  }    // serve for HTTP  http.HandleFunc("/api/graphql", engine.ServeHTTP)  if err := http.ListenAndServe(":8000", nil); err != nil {    panic(err)  }}

go get -u github.com/gqlengine/playground

...import (  "github.com/gorilla/mux"  "github.com/gqlengine/playground")...func main() {    ... // init your gql engine    // 为playground配置GraphQL端点（起码让playground知道该去哪里获得graphql数据吧;)）  playground.SetEndpoints("/api/graphql", "/api/graphql/subscriptions")    // recommends to use 'gorilla/mux' to serve the playground web assets  r := mux.NewRouter()  r.HandleFunc("/api/graphql", engine.ServeHTTP)  r.HandleFunc("/api/graphql/subscriptions", engine.ServeWebsocket)  r.PathPrefix("/api/graphql/playground").    Handler(http.StripPrefix("/api/graphql/playground",      http.FileServer(playground.WebBundle)))  println("open playground http://localhost:9996/api/graphql/playground/")  if err := http.ListenAndServe(":9996", r); err != nil {    panic(err)  }}