How ajax will GET the data from the golang code?

Question

I have a golang API for saving and retrieving the data from the form. Saving the data filled in the HTML form is okay. Means it will save the data in database of mongodb successfully but in case of retrieving the data it will retrieve the data on the basis of the email filled in the field of the html form is successful but it shows the data in the terminal of the ubuntu. Below is the code I'm trying for this:-

Html form index.html file

<form id="form1" method="post">
    <input id= "firstname" type="text" name="FirstName"  placeholder="Enter your firstname"><br><br>
    <input id= "lastname" type="text" name="LastName" placeholder="Enter your lastname"><br><br>
    <input id= "email" type="text" name="Email" placeholder="Enter your email"><br><br>
    <input id= "mobile" type="text" name="Mobile" placeholder="Enter your mobile"><br><br>
    <button id= "button1" class="button" name="button" type="button" value="Submit">Submit</button>
    <button id= "button2" class="button" name="button" type="submit" value="Search">Search</button>
</form>

Ajax in index.html is :-

$(document).ready(function(){
    //IT will save the data 
    $('#button1').on('click', function(e){
        button=this.value;
        console.log(button);
        e.preventDefault();
        if (button === "Submit") {
            var FirstName =$("#firstname").val(),
            LastName =$("#lastname").val(),
            Email =$("#email").val(),
            Mobile =$("#mobile").val();
            console.log(FirstName);
            $.ajax({
                url:"/login",
                type:"POST",
                data: {'button':button, "first":FirstName, "last":LastName, "email":Email, "mobile":Mobile},
                success: function(results) {
                    console.log(results);
                    $('#response').html(results);
                }
            });
        }
    });
    // This will search and I want the result in the success
    $('#button2').on('click', function(e){
        button=this.value;
        console.log(button);
        e.preventDefault();
        var Email =$("#email").val();
        $.ajax({
            url:"/get-data",
            type: "GET",
            data:{'button':button,"email":Email},
            success: function(results){
                console.log(results)
                $('#response').html(results);
            }
        });
    });
 });

Main.go file

import (
 "fmt"
 "gopkg.in/mgo.v2"
 "gopkg.in/mgo.v2/bson"
 "html/template"
 "log"
 "net/http"
 "encoding/json"
)
type USER struct {
 FirstName string `json:"FirstName,omitempty"`
 LastName  string `json:"LastName,omitempty"`
 Email     string `json:"Email,omitempty"`
 Mobile    string `json:"Mobile,omitempty"`
}
func login(w http.ResponseWriter, r *http.Request) {
 fmt.Println("method:", r.Method)
 if r.Method == "GET" {
    t, _ := template.ParseFiles("index.html")
    t.Execute(w, nil)
 } else {
    r.ParseForm()
    fmt.Println(r.Form)
    if r.Form["button"][0] == "Submit" {
        fmt.Println(r.Form)
        session, err := mgo.Dial("mongodb://127.0.0.1:27017/user")
        if err != nil {
            panic(err)
        }
        defer session.Close()
        session.SetMode(mgo.Monotonic, true)
        c := session.DB("user").C("profile")
        doc := USER{
            FirstName: r.Form["first"][0],
            LastName:  r.Form["last"][0],
            Email:     r.Form["email"][0],
            Mobile:    r.Form["mobile"][0],
        }
        err = c.Insert(doc)
        if err != nil {
            panic(err)
        }
        fmt.Println("FistName:", r.Form["first"][0])
        fmt.Println("LastName:", r.Form["last"][0])
        fmt.Println("Email:", r.Form["email"][0])
        fmt.Println("Mobile:", r.Form["mobile"][0])
    }
 }
}

func AllData(w http.ResponseWriter, r *http.Request){
 fmt.Println("method:", r.Method)
 if r.Method == "GET" {
    r.ParseForm()
    fmt.Println(r.Form)
     if r.Form["button"][0] == "Search" {
        fmt.Println(r.Form)
        fmt.Println(r.Form["email"][0])
        session, err := mgo.Dial("mongodb://127.0.0.1:27017/user")
        if err != nil {
            panic(err)
        }
        defer session.Close()
        session.SetMode(mgo.Monotonic, true)
        c := session.DB("user").C("profile")
        result := Users{}
        err = c.Find(bson.M{"email": r.Form["email"][0]}).All(&result)
        fmt.Println(result)
        b, err := json.MarshalIndent(result, "", "  ")
        if err != nil {
            panic(err)
        }
        fmt.Printf("%s\n", b)
    }
 }
}

func main() {
  http.HandleFunc("/login", login)
  http.HandleFunc("/get-data", AllData)
  err := http.ListenAndServe(":9090", nil)
  if err != nil {
      log.Fatal("ListenAndServe: ", err)
  }
}

What should I do for receiving the data from golang to the ajax GET method request click on the button search and result will display in the success function of the ajax. Thank you in advance.

Himanshu · Accepted Answer · 2018-05-02 07:08:41Z

1

Send the response header of Data function in json format and write the response of json which can be received in success of $.ajax

func AllData(w http.ResponseWriter, r *http.Request) {
    fmt.Println("method:", r.Method)
    if r.Method == "GET" {
            // your code ....
           b, err := json.MarshalIndent(result, "", "  ")
           if err != nil {
               panic(err)
           }
           fmt.Printf("%s\n", b)
           // set header to 'application/json'
           w.Header().Set("Content-Type", "application/json")
           // write the response
           w.Write(b)
       }
    }
}

Also there is an error in your code where you are returning from handler func AllData either create a middleware if you wants to do some modification in result or remove the return part of handler AllData

edited May 2, 2018 at 7:08

answered May 2, 2018 at 6:57

Himanshu

12.8k9 gold badges49 silver badges63 bronze badges

Sign up to request clarification or add additional context in comments.

6 Comments

gourav Over a year ago

it will giving me a error

cannot use string(b) (type string) as type []byte in argument to w.Write ./main.go:98:1: missing return at end of function ./main.go:103:18: cannot use AllData (type func(http.ResponseWriter, *http.Request) Users) as type func(http.ResponseWriter, *http.Request) in argument to http.HandleFunc

gourav Over a year ago

now it will giving the error of this

cannot use AllData (type func(http.ResponseWriter, *http.Request) Users) as type func(http.ResponseWriter, *http.Request) in argument to http.HandleFunc

Himanshu Over a year ago

yes because your AllData is returning users thats an error . Please check edited code.

Himanshu Over a year ago

yes you can. But I am getting late for some where you can drop your query. I will check it

gourav Over a year ago

Why should it giving the error of that i told you? The code you give is alright it works but can you explain it for me what is actually it is doing?

|

Collectives™ on Stack Overflow

How ajax will GET the data from the golang code?

1 Answer 1

6 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

6 Comments

Your Answer

Sign up or log in

Post as a guest

Related