douzheng5717
douzheng5717
2015-11-23 20:35
浏览 121

如何使用NewDecode,Golang和req * http.Request解码和映射JSON对象

Coming from PHP I'm a TOTAL Golang newb here. I read a question that is VERY similar to mine but my implementation is slightly off. Whenever I go to decode using the following code the variable msg.Username is always blank. Golang doesn't throw errors here so I know I'm missing something super small here and very important but I have no idea what it could be. I would be a very appreciative of any help and am of course expecting this to be a fist-to-foerhead epiphany. Thanks!

//The JSON I'm posting to my local server is  
//{"company_domain":"example.com", "user_name":"testu","password":"testpw"}

func Login(w http.ResponseWriter, req *http.Request) {
  type Message struct {
      CompanyDomain string
      Username      string
      Password      string
  }
  //decode
  var msg Message
  decoder := json.NewDecoder(req.Body)
  err := decoder.Decode(&msg)
  if err != nil {
      err.Error())
  }
  w.Write([]byte(msg.Username))// <- This print statement always comes in blank 
  authorize, err := models.VerifyAuth(msg.Username, msg.Password, msg.CompanyDomain, w)
  if err != nil {
      err.Error())
  }
  ...
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2条回答 默认 最新

  • doutuoben6908
    doutuoben6908 2015-11-23 20:37
    已采纳

    Tag your struct fields so the decoder knows how to map the json keys to your struct.

    type Message struct {
        CompanyDomain string `json:"company_domain"`
        Username      string `json:"user_name"`
        Password      string `json:"password"`
    }
    
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  • duan198299
    duan198299 2015-11-23 20:39

    You just need to add json:"field_name" to your struct:

    type Message struct {
        CompanyDomain string `json:"company_domain"`
        Username      string `json:"user_name"`
        Password      string `json:"password"`
    }
    
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