I am implementing vanilla JavaScript to send an AJAX post request to a Django server

Question

I am implementing vanilla JavaScript to send an AJAX post request to a Django server

I've been struggling with making an AJAX post request to Django using this JavaScript snippet:

const xhr = new XMLHttpRequest();

console.log(xhr.readyState);

xhr.open('POST', '');

var data = '{% csrf_token %}';

console.log(data);

console.log(typeof(data));

xhr.setRequestHeader('X-CSRF-Token', data);

xhr.onload = function(){

    console.log(xhr.readyState);

    console.log(xhr.status);

    if(xhr.status == 200){

        console.log(JSON.parse(xhr.responseText));

    }else{
        console.log("Something went wrong!!");
    }

}

xhr.send({'userId' : userId})

This is the error message I've been encountering: https://i.sstatic.net/2j05f.png

Unfortunately, I keep receiving a 403 forbidden error. Can anyone provide assistance?

javascript django ajax

Answer 1

Answer №1

This method will assist you in retrieving the csrf-token

function retrieveCookie(name) {
let cookieValue = null;
if (document.cookie && document.cookie !== '') {
    const cookies = document.cookie.split(';');
    for (let i = 0; i < cookies.length; i++) {
        const cookie = cookies[i].trim();
        // Check if the cookie string starts with the specified name
        if (cookie.substring(0, name.length + 1) === (name + '=')) {
            cookieValue = decodeURIComponent(cookie.substring(name.length + 1));
            break;
        }
    }
}
return cookieValue;
}

then:

const csrftoken = retrieveCookie('csrftoken');

to obtain the csrf-token.

It is also worth considering changing X-CSRF-Token

xhr.setRequestHeader('X-CSRF-Token', data);

to X-CSRFToken

xhr.setRequestHeader('X-CSRFToken', data);

I hope this information proves helpful

Answer 2

This method will assist you in retrieving the csrf-token

function retrieveCookie(name) {
let cookieValue = null;
if (document.cookie && document.cookie !== '') {
    const cookies = document.cookie.split(';');
    for (let i = 0; i < cookies.length; i++) {
        const cookie = cookies[i].trim();
        // Check if the cookie string starts with the specified name
        if (cookie.substring(0, name.length + 1) === (name + '=')) {
            cookieValue = decodeURIComponent(cookie.substring(name.length + 1));
            break;
        }
    }
}
return cookieValue;
}

then:

const csrftoken = retrieveCookie('csrftoken');

to obtain the csrf-token.

It is also worth considering changing X-CSRF-Token

xhr.setRequestHeader('X-CSRF-Token', data);

to X-CSRFToken

xhr.setRequestHeader('X-CSRFToken', data);

I hope this information proves helpful

Answer 3

Answer №2

The {% csrf_token %} in the templates page translates to:

<input type="hidden" name="csrfmiddlewaretoken" value="WRWu3DwbdHDl1keRwSqUNrvcwZXqhCzkInEGVftyuwWG0v5kBBzeGrZ34wKpjFB5">

We must retrieve the CSRF token , which is the value of this element:

x = document.getElementsByName("csrfmiddlewaretoken")[0].value;

After that, we have to provide this value to the setRequestHeader method of the JSON request, using "X-CSRFToken" as the first argument:

function requestJSON() {
         x = document.getElementsByName("csrfmiddlewaretoken")[0].value;
        jsonRequest = new XMLHttpRequest();
        jsonRequest.overrideMimeType("application/json");
        jsonRequest.onreadystatechange = function() {
         if (this.readyState == 4 && this.status == 200 ) {
             var j = JSON.parse(this.responseText); 
             // handle the JSON data
             } 
         else {console.log(this.status);}
         };
        jsonRequest.open("POST","url/");
        jsonRequest.setRequestHeader("content-type","application/x-www-form-urlencoded");
        jsonRequest.setRequestHeader("X-CSRFToken",x);
        jsonRequest.send();
}

Answer 4

The {% csrf_token %} in the templates page translates to:

<input type="hidden" name="csrfmiddlewaretoken" value="WRWu3DwbdHDl1keRwSqUNrvcwZXqhCzkInEGVftyuwWG0v5kBBzeGrZ34wKpjFB5">

We must retrieve the CSRF token , which is the value of this element:

x = document.getElementsByName("csrfmiddlewaretoken")[0].value;

After that, we have to provide this value to the setRequestHeader method of the JSON request, using "X-CSRFToken" as the first argument:

function requestJSON() {
         x = document.getElementsByName("csrfmiddlewaretoken")[0].value;
        jsonRequest = new XMLHttpRequest();
        jsonRequest.overrideMimeType("application/json");
        jsonRequest.onreadystatechange = function() {
         if (this.readyState == 4 && this.status == 200 ) {
             var j = JSON.parse(this.responseText); 
             // handle the JSON data
             } 
         else {console.log(this.status);}
         };
        jsonRequest.open("POST","url/");
        jsonRequest.setRequestHeader("content-type","application/x-www-form-urlencoded");
        jsonRequest.setRequestHeader("X-CSRFToken",x);
        jsonRequest.send();
}

I am implementing vanilla JavaScript to send an AJAX post request to a Django server

Answer №1

Answer №2

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