如何使用golang提供json回应?
发布时间:2020-12-16 19:20:52 所属栏目:大数据 来源:网络整理
导读:问题:目前我在func索引中打印出我的回复 像这样fmt.Fprintf(w,string(response))但是,如何在请求中正确地发送json,以便它可能被视图消耗? 包主 import ( "fmt" "github.com/julienschmidt/httprouter" "net/http" "log" "encoding/json")type Payload stru
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问题:目前我在func索引中打印出我的回复
像这样fmt.Fprintf(w,string(response))但是,如何在请求中正确地发送json,以便它可能被视图消耗? 包主 import (
"fmt"
"github.com/julienschmidt/httprouter"
"net/http"
"log"
"encoding/json"
)
type Payload struct {
Stuff Data
}
type Data struct {
Fruit Fruits
Veggies Vegetables
}
type Fruits map[string]int
type Vegetables map[string]int
func Index(w http.ResponseWriter,r *http.Request,_ httprouter.Params) {
response,err := getJsonResponse();
if err != nil {
panic(err)
}
fmt.Fprintf(w,string(response))
}
func main() {
router := httprouter.New()
router.GET("/",Index)
log.Fatal(http.ListenAndServe(":8080",router))
}
func getJsonResponse()([]byte,error) {
fruits := make(map[string]int)
fruits["Apples"] = 25
fruits["Oranges"] = 10
vegetables := make(map[string]int)
vegetables["Carrats"] = 10
vegetables["Beets"] = 0
d := Data{fruits,vegetables}
p := Payload{d}
return json.MarshalIndent(p,""," ")
}
您可以设置您的内容类型标题,以便客户端知道期望json
w.Header().Set(“Content-Type”,“application / json”) 将结构编组为json的另一种方法是使用http.ResponseWriter构建编码器 // get a payload p := Payload{d}
json.NewEncoder(w).Encode(p)
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