Crossdomain in python flask won't work

Question

I am trying to start some communication between flask server and html page. I included crossdomain code as explained here http://flask.pocoo.org/snippets/56/ and it still won't work. Here is my python code:

from flask import *
from crossdomain import *
app = Flask(__name__)
@app.route('/')
@crossdomain(origin='*')
def pocetna():
    return '1'
if __name__ == '__main__':
    app.run(host='0.0.0.0',port=8081,debug=True)        

and here is my javascript:

function prebaci(){
    var xmlhttp;
    xmlhttp=new XMLHttpRequest();
    xmlhttp.onreadystatechange=function()
    {
         if (xmlhttp.readyState==4 && xmlhttp.status==200)
         {
             if (xmlhttp.responseText==1) document.getElementById("kuca").innerHTML="RADI";
             else document.getElementById("kuca").innerHTML="NE RADI";
         }
    }
    xmlhttp.open("GET","127.0.0.1:8081",true);
    xmlhttp.send();
}

In google chrome error is:

XMLHttpRequest cannot load %3127.0.0.1:8081. Cross origin requests are only supported for HTTP.

And in Mozzila Firefox:

NS_ERROR_DOM_BAD_URI: Access to restricted URI denied 

Answer 1

Note the specific error message, it is telling you that you are not connecting to a HTTP server; at least Chrome doesn't think so.

Use:

xmlhttp.open("GET","http://127.0.0.1:8081/",true);

e.g. use a properly qualified URL.