javascript - Handle file download from ajax post -


i have javascript app sends ajax post requests url. response might json string or might file (as attachment). can detect content-type , content-disposition in ajax call, once detect response contains file, how offer client download it? i've read number of similar threads here none of them provide answer i'm looking for.

please, please, please not post answers suggesting shouldn't use ajax or should redirect browser, because none of option. using plain html form not option. need show download dialog client. can done , how?

edit:

apparently, cannot done, there simple workaround, suggested accepted answer. comes across issue in future, here's how solved it:

$.ajax({     type: "post",     url: url,     data: params,     success: function(response, status, request) {         var disp = request.getresponseheader('content-disposition');         if (disp && disp.search('attachment') != -1) {             var form = $('<form method="post" action="' + url + '">');             $.each(params, function(k, v) {                 form.append($('<input type="hidden" name="' + k +                         '" value="' + v + '">'));             });             $('body').append(form);             form.submit();         }     } });

so basically, generate html form same params used in ajax request , submit it.

create form, use post method, submit form - there's no need iframe. when server page responds request, write response header mime type of file, , present download dialog - i've done number of times.

you want content-type of application/download - search how provide download whatever language you're using.


Comments

Post a Comment

Popular posts from this blog

Why does Ruby on Rails generate add a blank line to the end of a file? -

running rails generate controller foo home results in: class foocontroller < application controller def home end end (there's nothing on line in actual file, blank line) is there purpose blank line? it's common use newline indicate end of line, last line. many editors (like vi, use) add in newline silently. consensus text files (especially in unix world) should end in newline, , there have been problems historically if wasn't present. why should text files end newline? the tool used count lines in file "wc" counts newlines in file, without trailing newline show 3 instead of 4. it improves readability of templates used in generator. consider: https://github.com/rails/rails/blob/master/railties/lib/rails/generators/rails/controller/templates/controller.rb to remove trailing newline, template have last line of: end<% end -%> instead of: end <% end -%> that seems less readable me. the discussion below refers ...
Read more

keyboard - Smiles and long press feature in Android -

i've created android keyboard. how add features inserting smilies, , using long keypresses display symbols? to create long-press behavior allows select several options pop-up menu, follow guide (specifically pop-up menu section): http://developer.android.com/guide/topics/ui/menus.html smileys (also known emoticons) combination of keys, understood programs , parsed same way. have do, when clicks smiley face on keyboard, simulate pressing of key combination matching emoticon. example, when clicks smiley, should simulate key presses ':' , ')' :). here's list of emoticons: http://en.wikipedia.org/wiki/list_of_emoticons
Read more

node.js - Bad Request - node js ajax post -

i'm using express 3.0 , node v0.11.0. have button submits form , i'm using ajax post data json object node server. client code is: $('#contact').submit(function(e) { console.log('submit called'); var formdata = json.stringify($('form').serializeobject()); console.log(formdata); $.ajax({ url: "http://localhost:3000/savedata/", type: "post", datatype: 'json', data: {objectdata: formdata}, contenttype: "application/json", complete: function() { console.log('process complete'); }, success: function(data) { console.log('process sucess'); }, error: function() { console.log('process error'); }, }); return false; }); then on server: var express = require('express'); var app = express(); app.set('views', __dirname + '/views'); app.set('view engine', 'jade'); app.use(express.bodyparser());...
Read more