What is the best way to retrieve a file using XMLHTTPRequest and Ajax?

I am currently using window.location.href to download a file, but this method requires a second call to my servlet which takes about 1 minute to generate the file. How can I download the file using XMLHTTPRequest instead? The solution should only work with Internet Explorer 7+ browsers. Is there a way to obtain the file without using window.location.href?

    Ext.Ajax.request({
    url : fileUrl,
    success : function(response){
        var resp = response.responseText;
        if (resp.indexOf('error')>-1){
            //some logic
        }else{
            window.location.href = fileUrl;
        }

    }
    }
});
javascriptajaxextjsxmlhttprequest

Answer №1

If you are seeking a way to download a file using XMLHTTPRequest, unfortunately it is not possible. To cater to browsers like IE7 and above, my suggestion would be to utilize an IFrame and specify the source on the IFrame instead. Also, ensure that the server's header includes Content-Disposition: attachment;

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