Django X-CSRFToken 已设置但仍被禁止 403

Question

我开发了一个 Django 文件上传 API，它从客户端接收发布的数据并将数据保存为文件。

根据Django CSRF manual，HTTP 请求标头应设置 X-CSRFToken 为 csrftoken cookie 值。我已经通过下面的代码设置了 X-CSRFToken，但是 POST 请求仍然被 Django 服务器禁止（403），如下图所示。

$(document).ready(function(){
    var authid
    $.get("http://localhost:8000/v1/getAuthID?username=testuser1&password=123", function(data){
        authid = data["authid"];
        var csrftoken = $.cookie('csrftoken');
        console.log(csrftoken);

        $.ajaxSetup({
            beforeSend: function(xhr, settings) {
                xhr.setRequestHeader("X-CSRFToken", csrftoken);
            }
        });

        url = "http://localhost:8000/v1/file".replace("{authid}", authid).replace("{token}", csrftoken)
        $.post(url, function(data){
        })
    })
})

您是如何通过向 Django 服务器发送 POST 请求来克服 Django CSRF 的？

谢谢！

Answer 1

将 ajaxSetup 移到 AJAX 成功函数之外，因为它是请求所必需的，而不是在它之后。

$(document).ready(function(){
    var authid;
    var csrftoken = $.cookie('csrftoken');
    console.log(csrftoken);

    $.ajaxSetup({
        beforeSend: function(xhr, settings) {
            xhr.setRequestHeader("X-CSRFToken", csrftoken);
        }
    });


    $.get("http://localhost:8000/v1/getAuthID?username=testuser1&password=123", function(data){
        authid = data["authid"];

        url = "http://localhost:8000/v1/file".replace("{authid}", authid).replace("{token}", csrftoken)
        $.post(url, function(data){
        })
    })
})

Answer 2

我使用下面的 javascript 代码来处理 ajax 调用的整个 CSRF 主题：

// This function gets cookie with a given name
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 = jQuery.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;
}
var csrftoken = getCookie('csrftoken');

/*
The functions below will create a header with csrftoken
*/

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));
}

$.ajaxSetup({
    beforeSend: function(xhr, settings) {
        if (!csrfSafeMethod(settings.type) && sameOrigin(settings.url)) {
            // Send the token to same-origin, relative URLs only.
            // Send the token only if the method warrants CSRF protection
            // Using the CSRFToken value acquired earlier
            xhr.setRequestHeader("X-CSRFToken", csrftoken);
        }
    }
});

只需在 JQuery 之后包含它。