$ .post（）错误Access-Control-Allow-Origin不允许使用原点null

Question

This code:

$(function(){
     $.get("test.html", function(data){
      $(".msgs").text(data)
     })
})

Gives me this console error:

XMLHttpRequest cannot load file:///C:/wamp/www/JQuery%20lab/check.php?username=&password=.
Origin null is not allowed by Access-Control-Allow-Origin

What can I do to fix this error?

Answer 1

You are viewing your HTML file directly from the webserver serving directory, not from http://localhost/ , so the browser is blocking the GET request.

Web browsers block certain kinds of JavaScript requests due to security policies, and sending a request from a local file seems to be one of them.

Answer 2

Another alternative is adding this to your php script:

header('Access-Control-Allow-Origin: null');
header('Access-Control-Allow-Credentials: true');