Ajax无法将URL字符串作为数据发布

Question

i just was wondering why i can not pass a url String via a ajax post request. I am posting to my own Server so there is no CORS issue i guess.

When i am trying todo this:

var url = $(".testInput").val();
$.post("api.php", {addSong: url});

i am getting a 403 Forbidden from my php file.

But as soon i am doing this:

var url = $(".testInput").val().replace("http://", "").replace("https://","");
$.post("api.php", {addSong: url});

i get a 200 okay from the server and it all works fine and perfectly.