windows - application working with smart card readers vs RDP and switching users -


one windows application works smart card readers. has cycle that:

do{ lerr = scardlistreaders( hcontext, ... ); if ( lerr != scard_s_success )     return 1; //show readers }while(!stop)

i.e. gets current list of readers, shows it. problem not work correct rdp connection. let's suppose have computer (comp_a) smart card reader (reader_a), computer b (comp_b) reader b (reader_b). application launched on comp_a , shows reader_a in list of readers. connect comp_b comp_a via rdp. correct result of must there reader_b in list. application "crashes" because scardlistreaders returns scard_e_service_stopped. goggling gave answer need re-establish context. new version of cycle:

do{ lerr = scardlistreaders( hcontext, ... ); if ( lerr == scard_e_service_stopped ) {     scardreleasecontext( hcontext );     //sleep(10000)     scardestablishcontext( ..., &hcontext );     lerr = scardlistreaders( hcontext, ... ); } if ( lerr != scard_s_success )     return 1; //show readers }while(!stop)

it not work, scardlistreaders returns reader_a in list. suppose because new scardestablishcontext ends before rdp connection set. @ least if sleep uncommented works correct. similar situation user switching, i.e. scardlistreaders returns scard_e_service_stopped when user chooses "switch user".

the question how make correct code? how determine rdp connection or user switching? how re-establish scard context?

actually made changes use wtsquerysessioninformation function wtsclientprotocoltype parameter. wait when wtsclientprotocoltype = 2 , call scardestablishcontext. not sure correct , not correct switch user.


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