graphql---go http请求使用详解

/*
定义 graphql 用户类型userType; Fields为user参数
 */
var userType = graphql.NewObject(
  graphql.ObjectConfig{
   Name: "User",
   Fields: graphql.Fields{
     "id": &graphql.Field{
      Type: graphql.String,
     },
     "name": &graphql.Field{
      Type: graphql.String,
     },
   },
  },
)

/*
定义graphql 查询类型 Resolve 通过Id 获取用户信息
 */
var queryType = graphql.NewObject(
  graphql.ObjectConfig{
   Name: "Query",
   Fields: graphql.Fields{
     "user": &graphql.Field{
      Type: userType,
      Args: graphql.FieldConfigArgument{
        "id": &graphql.ArgumentConfig{
         Type: graphql.String,
        },
      },
      Resolve: func(p graphql.ResolveParams) (interface{}, error) {
        idQuery, isOK := p.Args["id"].(string)
        if isOK {
         return data[idQuery], nil
        }
        return nil, nil
      },
     },
   },
  })

var schema, _ = graphql.NewSchema(
  graphql.SchemaConfig{
   Query: queryType,
  },
)

func executeQuery(query string, schema graphql.Schema) *graphql.Result {
  result := graphql.Do(graphql.Params{
   Schema:    schema,
   RequestString: query,
  })
  if len(result.Errors) > 0 {
   fmt.Printf("wrong result, unexpected errors: %v", result.Errors)
  }
  return result
}

import (
  "encoding/json"
  "fmt"
  "io/ioutil"
  "net/http"
  "github.com/graphql-go/graphql"
)
type user struct {  ID  string `json:"id"`  Name string `json:"name"`}var data map[string]user
func main() {
  data = make(map[string]user)
  data["1"] = user{
   ID:  "1",
   Name: "wt",
  }
  data["2"] = user{
   ID:  "2",
   Name: "go",
  }
  http.HandleFunc("/graphql", func(w http.ResponseWriter, r *http.Request) {
   result := executeQuery(r.URL.Query().Get("query"), schema)
   json.NewEncoder(w).Encode(result)
  })
  http.ListenAndServe(":8080", nil)
}

package main
import (
 "fmt"
 "strings"
 "net/http"
 "io/ioutil"
)
func main() {
 url := "http://**************/graphql/"
 method := "POST"  / "GET"
 payload := strings.NewReader("{\"query\":\"query UnitList($Ids: String!, $offset: Int!,){UnitList(searchParams: {Ids: $Ids, offset: $offset}, searchType: BASE) {list { score score_addbusinesstravel UnitTags commentScore } isOver count}}\",\"variables\":{\"luIds\":\"123\",\"offset\":0}}")
 client := &http.Client {
 }
 req, err := http.NewRequest(method, url, payload)
 if err != nil {
  fmt.Println(err)
 }
 req.Header.Add("Content-Type", "application/json")
 res, err := client.Do(req)
 defer res.Body.Close()
 body, err := ioutil.ReadAll(res.Body)
 fmt.Println(string(body))
}