REST call returns XML instead of JSON in SharePoint

Hi All,

enforce REST call to return JSON format instead of #document(XML).

$.ajax({
        url: _spPageContextInfo.webAbsoluteUrl + "/_api/web/currentuser",
        type: "GET",
        contentType : "application/json",
        headers: { "Accept": "application/json; odata=verbose" },    
        success: function (data) {        
            console.log(data);
            custUser = data.d;
        },
        error: function (error) {
            alert(JSON.stringify(error));
        }
    });
we would get the problematic output like below:

add the these lines in "beforeSend" method

$.ajax({
        url: _spPageContextInfo.webAbsoluteUrl + "/_api/web/currentuser",
        type: "GET",
        contentType : "application/json",
        headers: { "Accept": "application/json; odata=verbose" },
        beforeSend: function (XMLHttpRequest) {                  
        XMLHttpRequest.setRequestHeader("Accept", "application/json; odata=verbose");
    },
        success: function (data) {        
            console.log(data);
            custUser = data.d;
        },
        error: function (error) {
            alert(JSON.stringify(error));
        }
    });

after adding the header in beforeSend method the output will like below

:) coding

Regards
Ratsub