jQuery File Download from URL

jquery-file-download.js

// if you have url pointing to a file and you want to download a file with a click, normally you can do <a href='url'>.
// But this doesn't work if serving domain and file url domain are not same. This is browser secuirty measure
//For those case, you can use the code below

function downloadFileFromURL(url, filename) {
  $.ajax({
      type: "POST",
      url: url,
      data: params,
      success: function(response, status, xhr) {
          // check for a filename
          var filename = "";
          var disposition = xhr.getResponseHeader('Content-Disposition');
          if (disposition && disposition.indexOf('attachment') !== -1) {
              var filenameRegex = /filename[^;=\n]*=((['"]).*?\2|[^;\n]*)/;
              var matches = filenameRegex.exec(disposition);
              if (matches != null && matches[1]) filename = matches[1].replace(/['"]/g, '');
          }

          var type = xhr.getResponseHeader('Content-Type');
          var blob = new Blob([response], { type: type });

          if (typeof window.navigator.msSaveBlob !== 'undefined') {
              // IE workaround for "HTML7007: One or more blob URLs were revoked by closing the blob for which they were created. These URLs will no longer resolve as the data backing the URL has been freed."
              window.navigator.msSaveBlob(blob, filename);
          } else {
              var URL = window.URL || window.webkitURL;
              var downloadUrl = URL.createObjectURL(blob);

              if (filename) {
                  // use HTML5 a[download] attribute to specify filename
                  var a = document.createElement("a");
                  // safari doesn't support this yet
                  if (typeof a.download === 'undefined') {
                      window.location = downloadUrl;
                  } else {
                      a.href = downloadUrl;
                      a.download = filename;
                      document.body.appendChild(a);
                      a.click();
                  }
              } else {
                  window.location = downloadUrl;
              }

              setTimeout(function () { URL.revokeObjectURL(downloadUrl); }, 100); // cleanup
          }
      }
  });
}