Golang请求体一直报EOF错误。

huangapple
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英文:

Golang request body keep giving EOF error

问题

我有以下的Go程序，我想要读取通过POST发送的JSON值。我尝试了几种不同的方法，例如首先使用r.Body = http.MaxBytesReader(w, r.Body, 1048576)，然后再运行Json.NewDecoder(r.Body).Decode(&u)。所有的方法似乎都会出现相同的EOF错误。我甚至尝试了body, err := ioutil.ReadAll(r.Body)。所以所有的方法看起来都是一样的。

  1. func insertUser(w http.ResponseWriter, r *http.Request) {
  2.   type User struct {        
  3.     Uemail string `json:"uEmail"`
  4.     Upass string `json:"uPass"`    
  5.   }
  6.   var u User
  7.   if r.Method == "POST" {
  8.     if r.Header.Get("Content-Type") != "" {
  9.       value, _ := header.ParseValueAndParams(r.Header, "Content-Type")
  10.       if value != "application/json" {
  11.           msg := "Content-Type header is not application/json"
  12.           json.NewEncoder(w).Encode(Errormessage{msg});
  13.           return
  14.       }
  15.     }
  16.     //r.Body = http.MaxBytesReader(w, r.Body, 1048576)
  17.     /*body, err := ioutil.ReadAll(r.Body)
  18.     if err != nil {
  19.         return err
  20.     }*/
  21.     err := json.NewDecoder(r.Body).Decode(&u)
  22.     if err != nil {
  23.       fmt.Println("Decoding error is :", err)
  24.       json.NewEncoder(w).Encode(Errormessage{"Message decoding Issue"});
  25.         return
  26.     }
  27.     var uEmail string = u.Uemail
  28.     var uPass string = u.Upass
  29.    
  30.     fmt.Println("User Namess :", uEmail)
  31.     fmt.Println("User Password :", uPass)
  33.     w.Header().Set("Content-Type", "application/json; charset=utf-8")
  34.     w.Header().Set("X-Content-Type-Options", "nosniff")
  35.   }
  36. }
英文:

I have the following Go program which I want to read the JSON values send from via post. I have tried few different methods example r.Body = http.MaxBytesReader(w, r.Body, 1048576) first then only run Json.NewDecoder(r.Body).Decode(&u). All methods seems to be giving the same EOF error. I have even tried this body, err := ioutil.ReadAll(r.Body). So all seem the same

  1. func insertUser(w http.ResponseWriter, r *http.Request) {
  2.   type User struct {        
  3.     Uemail string `json:"uEmail"`
  4.     Upass string `json:"uPass"`    
  5.   }
  6.   var u User
  7.   if r.Method == "POST" {
  8.     if r.Header.Get("Content-Type") != "" {
  9.       value, _ := header.ParseValueAndParams(r.Header, "Content-Type")
  10.       if value != "application/json" {
  11.           msg := "Content-Type header is not application/json"
  12.           json.NewEncoder(w).Encode(Errormessage{msg});
  13.           return
  14.       }
  15.     }
  16.     //r.Body = http.MaxBytesReader(w, r.Body, 1048576)
  17.     /*body, err := ioutil.ReadAll(r.Body)
  18.     if err != nil {
  19.         return err
  20.     }*/
  21.     err := json.NewDecoder(r.Body).Decode(&u)
  22.     if err != nil {
  23.       fmt.Println("Decoding error is :", err)
  24.       json.NewEncoder(w).Encode(Errormessage{"Message decoding Issue"});
  25.         return
  26.     }
  27.     var uEmail string = u.Uemail
  28.     var uPass string = u.Upass
  29.    
  30.     fmt.Println("User Namess :", uEmail)
  31.     fmt.Println("User Password :", uPass)
  33.     w.Header().Set("Content-Type", "application/json; charset=utf-8")
  34.     w.Header().Set("X-Content-Type-Options", "nosniff")
  35.   }

答案1

得分: 1

请尝试运行以下代码：

  1. func insertUser(w http.ResponseWriter, r *http.Request) {
  2.   type User struct {        
  3.     Uemail string `json:"uEmail"`
  4.     Upass string `json:"uPass"`    
  5.   }
  6.   var u User
  7.   if r.Method == "POST" {
  8.     if r.Header.Get("Content-Type") != "" {
  9.       value, _ := header.ParseValueAndParams(r.Header, "Content-Type")
  10.       if value != "application/json" {
  11.           msg := "Content-Type header is not application/json"
  12.           json.NewEncoder(w).Encode(Errormessage{msg})
  13.           return
  14.       }
  15.     }
  17.     // CODE CHANGED HERE
  18.     body, err := ioutil.ReadAll(r.Body)
  19.     defer r.Body.Close()
  20.     if err != nil {
  21.         // handle error
  22.         return
  23.     }
  25.     err = json.Unmarshal(body, &u)
  26.     if err != nil {
  27.         // handle error
  28.         return
  29.     }
  30.     // CHANGED TILL HERE
  32.     var uEmail string = u.Uemail
  33.     var uPass string = u.Upass
  34.    
  35.     fmt.Println("User Namess :", uEmail)
  36.     fmt.Println("User Password :", uPass)
  38.     w.Header().Set("Content-Type", "application/json; charset=utf-8")
  39.     w.Header().Set("X-Content-Type-Options", "nosniff")
  40.   }
  41. }

这段代码是一个用于插入用户的函数。它首先定义了一个名为User的结构体，包含了Uemail和Upass两个字段。然后，它检查请求的方法是否为POST，并且检查请求头中的Content-Type是否为application/json。如果不是，它会返回一个错误消息。

接下来，代码读取请求体中的数据，并将其解析为User结构体。然后，它将Uemail和Upass赋值给相应的变量，并打印出来。

最后，代码设置响应头的Content-Type为application/json，并返回响应。

英文:

Please try running the following

  1. func insertUser(w http.ResponseWriter, r *http.Request) {
  2.   type User struct {        
  3.     Uemail string `json:"uEmail"`
  4.     Upass string `json:"uPass"`    
  5.   }
  6.   var u User
  7.   if r.Method == "POST" {
  8.     if r.Header.Get("Content-Type") != "" {
  9.       value, _ := header.ParseValueAndParams(r.Header, "Content-Type")
  10.       if value != "application/json" {
  11.           msg := "Content-Type header is not application/json"
  12.           json.NewEncoder(w).Encode(Errormessage{msg});
  13.           return
  14.       }
  15.     }
  17.     // CODE CHANGED HERE
  18.     body, err := ioutil.ReadAll(r.Body)
  19.     defer r.Body.Close()
  20.     if err != nil {
  21.         // handle error
  22.         return
  23.     }
  25.     err = json.Unmarshal(body, &u)
  26.     if err != nil {
  27.         // handle error
  28.         return
  29.     }
  30.     // CHANGED TILL HERE
  32.     var uEmail string = u.Uemail
  33.     var uPass string = u.Upass
  34.    
  35.     fmt.Println("User Namess :", uEmail)
  36.     fmt.Println("User Password :", uPass)
  38.     w.Header().Set("Content-Type", "application/json; charset=utf-8")
  39.     w.Header().Set("X-Content-Type-Options", "nosniff")
  40.   }
  41. }

huangapple
  • 本文由 发表于 2022年4月13日 20:41:04
  • 转载请务必保留本文链接：https://go.coder-hub.com/71857665.html
  • go
  • json
  • request
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