您好，我是 Golang 的新手，我正在嘗試使用 Mux 進行批量 POST。我希望能夠發布多個“生產”項目，而不僅僅是一個。在這里，我正在定義什么是農產品// Define the produce structuretype Produce struct { Name string `json:"name"` Code string `json:"code"` Unit_Price float64 `json:"unit_price"`}// Init produce var as a Produce slicevar produce []Produce這是我當前的 POST 代碼func addProduce(w http.ResponseWriter, r *http.Request) { w.Header().Set("Content-Type", "application/json") var newProduceItem Produce _ = json.NewDecoder(r.Body).Decode(&newProduceItem) re := regexp.MustCompile("^[a-zA-Z0-9]{4}-[a-zA-Z0-9]{4}-[a-zA-Z0-9]{4}-[a-zA-Z0-9]{4}$") if re.MatchString(newProduceItem.Code) == true && len(newProduceItem.Name) > 0 { newProduceItem.Unit_Price = math.Round(newProduceItem.Unit_Price*100) / 100 //rounds to the nearest cent produce = append(produce, newProduceItem) json.NewEncoder(w).Encode(newProduceItem) } else { http.Error(w, fmt.Sprintf("Incorrect produce code sequence or product name. Example code sequence: A12T-4GH7-QPL9-3N4M"), http.StatusBadRequest) }}它在 main() 函數中調用，如此處所示。func main() { router := mux.NewRouter() router.HandleFunc("/produce", addProduce).Methods("POST") log.Fatal(http.ListenAndServe(":8000", router))}這是我在 Postman 中 POST 時正在工作的 JSON 數據示例{ "name":"Peach", "code": "TTTT-44D4-A12T-1224", "unit_price": 5.3334}我希望能夠一次發布多個農產品項目，例如....[ { "name": "Green Pepper", "code": "YRT6-72AS-K736-L4AR", "unit_price": 0.79 }, { "name": "Gala Apple", "code": "TQ4C-VV6T-75ZX-1RMR", "unit_price": 3.59 },]謝謝
1 回答
揚帆大魚
TA貢獻1799條經驗 獲得超9個贊
顯然有很多方法可以解決，這里有一個
package main
import (
"encoding/json"
"fmt"
"log"
"math"
"net/http"
"regexp"
"github.com/gorilla/mux"
)
type Produce struct {
Name string `json:"name"`
Code string `json:"code"`
Unit_Price float64 `json:"unit_price"`
}
type ProduceList []Produce
// global var where all produce is kept,
// not persistent
var produce ProduceList
func addProduce(w http.ResponseWriter, r *http.Request) {
// we accept a json and decode it into a slice of structs
var newProduceItems ProduceList
err := json.NewDecoder(r.Body).Decode(&newProduceItems)
if err != nil {
log.Panic(err)
}
var tempItems ProduceList
re := regexp.MustCompile("^[a-zA-Z0-9]{4}-[a-zA-Z0-9]{4}-[a-zA-Z0-9]{4}-[a-zA-Z0-9]{4}$")
// iterate over each element in the posted json and validate
// when validated, add to the temporary accumulator
// if not validated, error out and stop
for idx, produceItem := range newProduceItems {
if !re.MatchString(produceItem.Code) || len(produceItem.Name) <= 0 {
errMsg := fmt.Sprintf("Item %d: Incorrect produce code sequence or product name. Example code sequence: A12T-4GH7-QPL9-3N4M", idx)
http.Error(w, errMsg, http.StatusBadRequest)
return
}
produceItem.Unit_Price = math.Round(produceItem.Unit_Price*100) / 100 //rounds to the nearest cent
tempItems = append(tempItems, produceItem)
}
// after validation, append new items to the global accumulator and respond back with added items
produce = append(produce, tempItems...)
w.Header().Set("Content-Type", "application/json")
if err = json.NewEncoder(w).Encode(newProduceItems); err != nil {
log.Panic(err)
}
}
func main() {
router := mux.NewRouter()
router.HandleFunc("/produce", addProduce).Methods("POST")
log.Fatal(http.ListenAndServe(":8000", router))
}
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