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[英]Forbidden (CSRF token missing or incorrect.) during ajax POST in Django
[英]CSRF token AJAX based post in a Django Project
所以我發現了錯誤,它在我的HTML中。 我剛剛添加了{% csrf_token %}
,它的效果很{% csrf_token %}
:)感謝您的協助!
(我在第一個答案中使用了給我的JS代碼段,但仍然收到403 Forbidden錯誤!)我怎么可能做錯了?
我最近學習了JS,並嘗試了AJAX POST的以下JS代碼,但出現403錯誤。 做了一些進一步的研究,發現我需要傳遞一個CSRF令牌。 我已經在線閱讀了很多教程,但是我唯一能找到的解決方案是JQuery,而且我不知道該語法如何工作。 我需要知道如何通過Django項目的基於Javascript AJAX的帖子傳遞CSRF令牌。 我的代碼是;
var upvoteBtn = document.querySelector('#upvote');
var downvoteBtn = document.querySelector('#downvote');
upvoteBtn.addEventListener('click', jL);
downvoteBtn.addEventListener('click', cL);
function jL(event) {
document.getElementById("upvote").style.display='none';
document.getElementById("downvote").style.display='none';
var http = new XMLHttpRequest ();
var url = 'entered my url here';
var data = 'title=Post%20Title&body=Body';
var method = 'POST';
http.open(method, url, true);
http.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded')
http.setRequestHeader("X-CSRFToken", csrftoken);
http.onreadystatechange = function() {
if (http.readyState === XMLHttpRequest.DONE && http.status === 200){
document.getElementById("first").innerHTML = "this post has been voted";
console.log("upvote given");
}
else if (http.readyState === XMLHttpRequest.DONE && http.status !== 200){
console.log("error!", http.responseText);
}
};
http.send(data);
}
function cL(event){
document.getElementById("upvote").style.display='none';
document.getElementById("downvote").style.display='none';
var http = new XMLHttpRequest ();
var url = 'entered my url here';
var data = 'title=Post%20Title&body=Body';
var method = 'POST';
http.open(method, url, true);
http.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded')
http.setRequestHeader("X-CSRFToken", csrftoken);
http.onreadystatechange = function() {
if (http.readyState === XMLHttpRequest.DONE && http.status === 200){
document.getElementById("first").innerHTML = "got downvoted";
console.log("downvoted!");
}
else if (http.readyState === XMLHttpRequest.DONE && http.status !== 200){
console.log("error!", http.responseText);
}
};
http.send(data);
}
//function for CSRF token
function getCookie(cname) {
var name = cname + "=";
var decodedCookie = decodeURIComponent(document.cookie);
var ca = decodedCookie.split(';');
for(var i = 0; i <ca.length; i++) {
var c = ca[i];
while (c.charAt(0) == ' ') {
c = c.substring(1);
}
if (c.indexOf(name) == 0) {
return c.substring(name.length, c.length);
}
}
return "";
}
var csrftoken = getCookie('csrftoken');
您需要致電:
xhr.setRequestHeader("X-CSRFToken", csrftoken);
當您准備xhr
請求時。 (在您的示例中, xhr
名為http
)
您可以從cookie中獲取csrftoken
,但是為此,您需要實現getCookie
函數。
這樣的事情應該可以解決問題:
function getCookie(cname) {
var name = cname + "=";
var decodedCookie = decodeURIComponent(document.cookie);
var ca = decodedCookie.split(';');
for(var i = 0; i <ca.length; i++) {
var c = ca[i];
while (c.charAt(0) == ' ') {
c = c.substring(1);
}
if (c.indexOf(name) == 0) {
return c.substring(name.length, c.length);
}
}
return "";
}
var csrftoken = getCookie('csrftoken');
在您的代碼中,看起來應該像這樣:
upvoteBtn.addEventListener('click', jL);
downvoteBtn.addEventListener('click', cL);
//first define your getCookie function
function getCookie(cname) {
var name = cname + "=";
var decodedCookie = decodeURIComponent(document.cookie);
var ca = decodedCookie.split(';');
for(var i = 0; i <ca.length; i++) {
var c = ca[i];
while (c.charAt(0) == ' ') {
c = c.substring(1);
}
if (c.indexOf(name) == 0) {
return c.substring(name.length, c.length);
}
}
return "";
}
function jL(event) {
//...
//Then when you prepare you data fetch the token
var csrftoken = getCookie('csrftoken');
http.open(method, url, true);
http.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded')
//Now set it
http.setRequestHeader("X-CSRFToken", csrftoken);
//... the rest of your code
}
function cL(event){
//do the same here
}
將這段代碼添加到您的JS中:
function getCookie(name) {
var cookieValue = null;
if (document.cookie && document.cookie != '') {
var cookies = document.cookie.split(';');
for (var i = 0; i < cookies.length; i++) {
var cookie = $.trim(cookies[i]);
// Does this cookie string begin with the name we want?
if (cookie.substring(0, name.length + 1) == (name + '=')) {
cookieValue = decodeURIComponent(cookie.substring(name.length + 1));
break;
}
}
}
return cookieValue;
}
function csrfSafeMethod(method) {
// these HTTP methods do not require CSRF protection
return (/^(GET|HEAD|OPTIONS|TRACE)$/.test(method));
}
function sameOrigin(url) {
// test that a given url is a same-origin URL
// url could be relative or scheme relative or absolute
var host = document.location.host; // host + port
var protocol = document.location.protocol;
var sr_origin = '//' + host;
var origin = protocol + sr_origin;
// Allow absolute or scheme relative URLs to same origin
return (url == origin || url.slice(0, origin.length + 1) == origin + '/') ||
(url == sr_origin || url.slice(0, sr_origin.length + 1) == sr_origin + '/') ||
// or any other URL that isn't scheme relative or absolute i.e relative.
!(/^(\/\/|http:|https:).*/.test(url));
}
if (!csrfSafeMethod(http.responseType) && sameOrigin(http.responseUrl)) {
http.setRequestHeader("X-CSRFToken", getCookie('csrftoken'));
}
基本上,您需要將CSRF令牌添加到標頭中。 如果有人知道會很棒,那么我找不到在這段代碼中找到的鏈接。
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