add download

UI/Component/Form.js

@@ -342,6 +342,29 @@ export class Form
         {
             console.log(xhr.response);
 
+            if (xhr.getResponseHeader('content-type') === 'application/octet-stream') {
+                const blob = new Blob([xhr.response], { type: 'application/octet-stream' });
+                const doc = document.createElement('a');
+                doc.style = 'display: none';
+                document.body.appendChild(doc);
+                const url = window.URL.createObjectURL(blob);
+                doc.href = url;
+
+                const disposition = xhr.getResponseHeader('content-disposition');
+                let filename = '';
+                if (disposition && disposition.indexOf('attachment') !== -1) {
+                    const filenameRegex = /filename[^;=\n]*=((['"]).*?\2|[^;\n]*)/;
+                    const matches = filenameRegex.exec(disposition);
+                    if (matches !== null && matches[1]) {
+                        filename = matches[1].replace(/['"]/g, '');
+                    }
+                }
+
+                doc.download = filename;
+                doc.click();
+                window.URL.revokeObjectURL(url);
+                document.body.removeChild(doc);
+            } else {
                 try {
                     const o           = JSON.parse(xhr.response)[0],
                         response      = new Response(o);
@@ -365,6 +388,7 @@ export class Form
                         + 'Response: ' + xhr.response
                     );
                 }
+            }
         });
 
         request.setResultCallback(0, function (xhr)