javascript - python flask: How to handle send_file on the client side -

i generated excel file server-side in situ input given on client side using xlwt , stringio. send file client, s/he can save (ideally save dialog).

i trying send_file, not javascript/jquery/ajax, not know how handle on client side. based on code below (gathered flask homepage), give me hint how there?

thanks help!

here's code:

please note: js code triggered click event on button. works fine when passing json client server , back...

python

import stringio import wordpuzzle # code creates excel file  @app.route('/_create_wordsearch') def create_wordsearch():      wordlist = json.loads(request.args.get('wordlist'))      # create stringio object     output = stringio.stringio()      # instantiate puzzlegrid class     p = wordpuzzle.puzzlegrid(wordlist)      # create puzzle     p.main()      # create xls file in memory     p.output2excel(output)      # set start     output.seek(0)      # send client     return send_file(output, mimetype='application/vnd.ms-excel') 

js

$(document).ready(function() {     $("#create_btn").bind('click', function(){         //get words list         var list = [];         $("#wordlist option").each(function(){             list.push($(this).val());         });         $.getjson($script_root + '/_create_wordsearch', {             wordlist: json.stringify(list)         }, function(data){             // goes in here?         });         return false;     }); }); 

assuming have div on page use target:

<div id="exportdiv"></div> 

replace $.getjson call code this:

var url = $script_root + '/_create_wordsearch';  // hide div, write form $('#exportdiv').hide()     .html('<form id="exportform" action="' + url + '" target="_blank" method="get">'         + '<textarea name="wordlist">' + json.stringify(list) +'</textarea>'         + '</form>');  // submit form $('#exportform').submit(); 

and on server side, need unescape json. i'm not if can feed markup.unescape() directly json.loads like:

wordlist = json.loads(markup(request.args.get('wordlist')).unescape())