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Dear All,
I got issue, below php code is in controller, when i do jquery ajax requests it works but when i make a call with JS Code mentioned below it wont work. if remove (!$this->input->is_ajax_request()) check. below js code work. please anyone can suggest me what i am doing wrong or what i should do to keep (!$this->input->is_ajax_request())check, this check is important.

PHP Code:
if (!$this->input->is_ajax_request()) {
 redirect('backend');
  exit();
}else{
 // Continue to process
} 

Javascript

Code:
var ajax = new XMLHttpRequest();

            ajax.open("POST", ajaxUrl, true);

            ajax.onreadystatechange = function () {

                if (this.readyState == 4) {

                    if (this.status == 200) {

                        console.log(this.response);

                        console.log(typeof this.response); // should be a blob

                        var blob = new Blob([this.response], {type: "application/octet-stream"});

                        //saveAs(blob, file_name);

                    } else if (this.responseText != "") {

                        console.log(this.responseText);

                    }

                } else if (this.readyState == 2) {

                    if (this.status == 200) {

                        this.responseType = "blob";

                    } else {

                        this.responseType = "text";

                    }

                }

            };

            ajax.send(null);

Not sure what JavaScript or framework your using some do not send the HTTP_X_REQUESTED_WITH header. jQuery doe's send it.

You can try this and see what you get this is the old way that we use to do it.

Code:
define('IS_AJAX', isset($_SERVER['HTTP_X_REQUESTED_WITH']) && strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) == 'xmlhttprequest');

if(IS_AJAX) {

    ... it's an AJAX request so do something ...

}

else {

    ... it's not an AJAX request so do something else ...

}

You can place the define in your ./application/config/constants.php file or were you want.

You may need to send the header yourself.

You need to manually specify the requested-with method with plain JS. jQuery and other libraries does it for it like InsiteFX said.

Code:
//Send the proper header information along with the request

ajax.setRequestHeader("X-Requested-With",'xmlhttprequest');

(10-04-2018, 10:02 AM)InsiteFX Wrote: [ -> ]You can try this and see what you get this is the old way that we use to do it.

[code]define('IS_AJAX', isset($_SERVER['HTTP_X_REQUESTED_WITH']) && strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) == 'xmlhttprequest');

The above (more or less) what CI_Input does

From /system/core/Input.php

PHP Code:
   public function is_ajax_request()
    {
       return ( ! empty($_SERVER['HTTP_X_REQUESTED_WITH']) && strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) === 'xmlhttprequest');
    } 

I think there is something in the JavaScript that is producing a non-standard XMLHttpRequest.

tecthon

InsiteFX

jreklund

dave friend