I am trying to access cross-domain data by using jsonp or XMLHttpRequest with GET method. My Code:
XMLHttpRequest
var xhr = new XMLHttpRequest();
xhr.open("GET", "http://example.com/ajax.php?code=BSE", true);
xhr.onreadystatechange = function() {
if (xhr.readyState == 4) {
alert(xhr.responseText);
}
xhr.send();
JsonP
$.ajax({
type: 'GET',
url: "http://example.com/ajax.php?code=BSE",
dataType: "jsonp",
jsonpCallback: "jsonp_callback",
crossDomain: true,
success: function(res){
console.log(res);
}
});
Both methods having same behavior. Whenever i am sending request its just keep loading (even i am not sure its sending request or not) and do nothing.
And my php code:
PHP Code:
header('content-type: application/json; charset=utf-8');
$dts=array('value'=>'123');
echo $_GET['jsonp_callback'] . '('.json_encode($dts).')';
The XMLHttpRequest will work just fine, no need for jsonp. In your manifest.json, make sure you request permissions for the domain you are posting to -- Chrome doesn't require permissions for XHR, but Firefox does. This error manifests in Firefox as a http code 404 in the XHR, but no activity in the network panel. If you get a http code 0, you have CORS or mixed content security issues as well.
{
"manifest_version": 2,
"name": "web extension",
"version": "1",
"permissions": [
"http://example.com/"
],
"content_scripts": [
{
// ...
}
]
}
Try using new XDomainRequest() in your xhr request. XDomainRequest is an implementation of HTTP access control (CORS).
var createCORSRequest = function(method, url) {
var xhr = new XMLHttpRequest();
if ("withCredentials" in xhr) {
// Most browsers.
xhr.open(method, url, true);
} else if (typeof XDomainRequest != "undefined") {
// IE8 & IE9
xhr = new XDomainRequest();
xhr.open(method, url);
} else {
// CORS not supported.
xhr = null;
}
return xhr;
};
var url = 'http://example.com/ajax.php?code=BSE';
var method = 'GET';
var xhr = createCORSRequest(method, url);
xhr.onload = function() {
// Success code goes here.
};
xhr.onerror = function() {
// Error code goes here.
};
xhr.setRequestHeader('content-type', 'application/json; charset=utf-8');
xhr.send();