Component returned failure code: 0x805e0006 error

The following JQuery get call:

var doc_root = document.location.hostname + ":8082";
var fw_script = doc_root + "/sites/MyScripts/fw2.php";
var langpref = "EN";

var ttype = "BEGIN";
var vvalue = $("#inp_begin").val();

$.get(fw_script, { type: ttype, value: vvalue, langpref: langpref })
    .success(function(result) {
        $(fw_result).text(result);
        alert("Success");
    })
    .error(function(jqXHR, textStatus, errorThrown) {
        $(fw_result).text("Error: " + textStatus + " " + errorThrown);
        alert("Failure");
    });

is generating the following error message (.error is called):

Error: error [Exception... "Component returned failure code: 0x805e0006
[nsIXMLHttpRequest.open]" nsresult: "0x805e0006 (<unknown>)" location: "JS frame ::
http://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js
:: <TOP_LEVEL> :: line 4" data: no]

I have no idea what this message is and I can't find much explanation with my Googling. Can anyone clarify?

UPDATE

The called URL is constructed as following in Javascript:

var doc_root = document.location.hostname + ":8082";
var fw_script = doc_root + "/sites/MyScripts/fw2.php";

and fw_script's value is:

fw.localhost:8082/sites/MyScripts/fw2.php

It is called from

fw.localhost:8082/en

When I try fw.localhost:8082/sites/MyScripts/fw2.php in my browser, it is successful.

回答1:

Looks very likely that you're dealing with a cross-domain request error. According to the Same Origin Policy, you can't make an AJAX request to a host with a different port number, even if it's the same domain. It looks like you're setting doc_root to a different origin, by this definition, so you'll likely get an error on the AJAX request.

The standard options for fixing this:

Serve your data from the same host you're making the request from.
Use JSONP instead of JSON.

回答2:

Just to call attention to the sleuthing done by @nrabinowitz and other commenters: check your ad blocker/privacy plugin. In my case, Privacy Badger started blocking localhost.