javascript - How to get file name from content-disposition

Question

I Downloaded file as response of ajax. How to get file name and file type from content-disposition and display thumbnail for it. i got many search results but couldn't find right way.

$(".download_btn").click(function () {
    var uiid = $(this).data("id2");

    $.ajax({
        url: "http://localhost:8080/prj/" + data + "/" + uiid + "/getfile",
        type: "GET",
        error: function (jqXHR, textStatus, errorThrown) {
            console.log(textStatus, errorThrown);
        },
        success: function (response, status, xhr) 
        {
            var header = xhr.getResponseHeader('Content-Disposition');
            console.log(header);     
        }
    });

console output:inline; filename=demo3.png

Answer 1

Here is how I used it sometime back. I'm assuming you are providing the attachment as a server response.

I set the response header like this from my REST service response.setHeader("Content-Disposition", "attachment;filename=XYZ.csv");

function(response, status, xhr){
    var filename = "";
    var disposition = xhr.getResponseHeader('Content-Disposition');
    if (disposition && disposition.indexOf('attachment') !== -1) {
        var filenameRegex = /filename[^;=
]*=((['"]).*?2|[^;
]*)/;
        var matches = filenameRegex.exec(disposition);
        if (matches != null && matches[1]) { 
          filename = matches[1].replace(/['"]/g, '');
        }
    }
}

EDIT: Editing the answer to suit your question- use of the word inline instead of attachment

function(response, status, xhr){
    var filename = "";
    var disposition = xhr.getResponseHeader('Content-Disposition');
    if (disposition && disposition.indexOf('inline') !== -1) {
        var filenameRegex = /filename[^;=
]*=((['"]).*?2|[^;
]*)/;
        var matches = filenameRegex.exec(disposition);
        if (matches != null && matches[1]) { 
          filename = matches[1].replace(/['"]/g, '');
        }
    }
}

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