Add accessible format, add support for multiple CAPTCHAS on a page (use class instead of id for container)
This commit is contained in:
Skylar Ittner
parent
f61e08d699
commit
a62d1b85e0
31
api.php
31
api.php
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@ -35,9 +35,15 @@ switch ($VARS['action']) {
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$scrambled_insert[] = ["sid" => $sid, "aid" => $scrambled['real'][$i], "acode" => $scrambled['fake'][$i]];
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}
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$database->insert("scrambled_answers", $scrambled_insert);
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$questions = ["Please click on the [].", "Click the [].", "Find the []."];
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$accessible_questions = ["Please type [] here.", "Enter [] into the box.", "Type []."];
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shuffle($questions);
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shuffle($accessible_questions);
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$resp = [
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"session" => $skey,
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"question" => $correct_answer['aname'],
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"id_prefix" => substr(hash("md5", mt_rand()), 3, 5),
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"question_i" => str_replace("[]", $correct_answer['aname'], $questions[0]),
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"question_a" => str_replace("[]", $correct_answer['aname'], $accessible_questions[0]),
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"answers" => $scrambled["fake"]
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];
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exit(json_encode($resp));
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@ -88,15 +94,28 @@ switch ($VARS['action']) {
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echo json_encode(["session" => $VARS['session_id'], "result" => false, "msg" => "Session key already used."]);
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exit();
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}
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if (!$database->has("scrambled_answers", ["AND" => ["sid" => $sid, "acode" => $VARS['answer_id']]])) {
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$image = false;
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if ($database->has("scrambled_answers", ["AND" => ["sid" => $sid, "acode" => $VARS['answer_id']]])) {
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// Image maybe correct
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$image = true;
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} else if ($database->has("sessions", ["[>]answers" => ["aid" => "aid"]], ["AND" => ["sid" => $sid, "aname" => $VARS['answer_id']]])) {
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// Accessible text correct
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$image = false;
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} else {
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// Invalid answer
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echo json_encode(["session" => $VARS['session_id'], "result" => false, "msg" => "Answer invalid."]);
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exit();
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}
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$aid = $database->get('scrambled_answers', 'aid', ["AND" => ["sid" => $sid, "acode" => $VARS['answer_id']]]);
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if ($database->has('sessions', ["AND" => ["sid" => $sid, "aid" => $aid]])) {
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echo json_encode(["session" => $VARS['session_id'], "result" => true]);
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if ($image) {
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$aid = $database->get('scrambled_answers', 'aid', ["AND" => ["sid" => $sid, "acode" => $VARS['answer_id']]]);
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if ($database->has('sessions', ["AND" => ["sid" => $sid, "aid" => $aid]])) {
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echo json_encode(["session" => $VARS['session_id'], "result" => true]);
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} else {
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echo json_encode(["session" => $VARS['session_id'], "result" => false, "msg" => "Answer incorrect."]);
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}
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} else {
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echo json_encode(["session" => $VARS['session_id'], "result" => false, "msg" => "Answer incorrect."]);
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echo json_encode(["session" => $VARS['session_id'], "result" => true]);
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}
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$database->update("sessions", ['expired' => 1], ["sid" => $sid]);
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exit();
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@ -42,4 +42,28 @@ Don't use this file in your site; captcheck.js contains it.
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.captcheck_error_message {
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color: red;
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}
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.captcheck_question_image {
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display: initial;
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}
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.captcheck_question_access {
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display: none;
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}
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.captcheck_alt_question_button {
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float: right;
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font-size: 80%;
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cursor: pointer;
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color: inherit;
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text-decoration: inherit;
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}
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.captcheck_answer_images {
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display: initial;
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}
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.captcheck_answer_access {
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display: none;
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}
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@ -1 +1 @@
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function chooseAnswer(e){var a=document.getElementById("captcheck_answer_"+e);a.checked=!0}window.onload=function(){var e="https://captcheck.netsyms.com/api.php",a=function(e,a){var n=new XMLHttpRequest;n.open("GET",e,!0),n.onreadystatechange=function(){4==this.readyState&&a(this.status,this.responseText)},n.send()};a(e+"?action=new",function(a,n){var c=document.createElement("style");c.innerHTML=".captcheck_box,.captcheck_label_message,.captcheck_label_message b{color:#000;font-family:Ubuntu,Arial,sans-serif}.captcheck_box{border:1px solid #e0e0e0;border-radius:3px;display:inline-block;padding:3px;margin:5px 2px 5px 1px;background-color:#f5f5f5}.captcheck_answer_label>input{visibility:hidden;position:absolute}.captcheck_answer_label>input+img{cursor:pointer;border:2px solid transparent;border-radius:3px;min-width:32px;width:18%;max-width:64px}.captcheck_answer_label>input:checked+img{cursor:pointer;border:2px solid #424242;border-radius:3px}.captcheck_error_message{color:red}",document.body.appendChild(c);var t=document.getElementById("captcheck_container"),s=document.createElement("div");if(s.setAttribute("class","captcheck_box"),t.appendChild(s),200==a){for(var r=JSON.parse(n),i="",o=0,p=r.answers.length;p>o;o++){var d=e+"?action=img&s="+r.session+"&c="+r.answers[o];i+="<span class='captcheck_answer_label' onclick='chooseAnswer(\""+r.answers[o]+"\")'><input id='captcheck_answer_"+r.answers[o]+"' type='radio' name='captcheck_selected_answer' value='"+r.answers[o]+"' /><img src='"+d+"' /></span>"}var l=document.createElement("div");l.innerHTML=i;var h=document.createElement("div");h.setAttribute("class","captcheck_label_message"),h.innerHTML="Click on the <b>"+r.question+"</b>:",s.appendChild(h),s.appendChild(l);var u=document.createElement("span");u.innerHTML="<input type='hidden' name='captcheck_session_code' value='"+r.session+"' />",s.appendChild(u)}else s.innerHTML="<span class='captcheck_error_message'>There was a problem loading the CAPTCHA.</span>"})};
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function chooseAnswer(e,t){var a=document.getElementById("captcheck_"+e+"_answer_"+t);return a.checked=!0,!1}function switchMode(e){var t=document.getElementById("captcheck_"+e+"_alt_question_button"),a=document.getElementById("captcheck_"+e+"_question_image"),c=document.getElementById("captcheck_"+e+"_question_access"),n=document.getElementById("captcheck_"+e+"_answer_images"),s=document.getElementById("captcheck_"+e+"_answer_access");"> Text mode"==t.innerHTML?(t.innerHTML="> Image mode",a.style.display="none",c.style.display="initial",n.style.display="none",s.style.display="initial",s.innerHTML="<input type='text' name='captcheck_selected_answer' aria-label='Type your answer here.' autocomplete='off' autofill='off'/>"):(t.innerHTML="> Text mode",a.style.display="initial",c.style.display="none",n.style.display="initial",s.style.display="none",s.innerHTML="")}window.onload=function(){var e="https://captcheck.netsyms.com/api.php",t=document.createElement("style");t.innerHTML=".captcheck_box,.captcheck_label_message,.captcheck_label_message b{color:#000;font-family:Ubuntu,Arial,sans-serif}.captcheck_box{border:1px solid #e0e0e0;border-radius:3px;display:inline-block;padding:3px;margin:5px 2px 5px 1px;background-color:#f5f5f5}.captcheck_answer_label>input{visibility:hidden;position:absolute}.captcheck_answer_label>input+img{cursor:pointer;border:2px solid transparent;border-radius:3px;min-width:32px;width:18%;max-width:64px}.captcheck_answer_label>input:checked+img{cursor:pointer;border:2px solid #424242;border-radius:3px}.captcheck_error_message{color:red}.captcheck_question_image{display:initial}.captcheck_question_access{display:none}.captcheck_alt_question_button{float:right;font-size:80%;cursor:pointer;color:inherit;text-decoration:inherit}.captcheck_answer_images{display:initial}.captcheck_answer_access{display:none}",document.body.appendChild(t),Array.prototype.forEach.call(document.getElementsByClassName("captcheck_container"),function(t){var a=new XMLHttpRequest;a.open("GET",e+"?action=new",!0),a.onreadystatechange=function(){if(4==this.readyState){var a=this.status,c=this.responseText,n=document.createElement("div");if(n.setAttribute("class","captcheck_box"),t.appendChild(n),200==a){for(var s=JSON.parse(c),i=s.id_prefix,r="<div class='captcheck_answer_images' id='captcheck_"+i+"_answer_images'>",o=0,l=s.answers.length;l>o;o++){var p=e+"?action=img&s="+s.session+"&c="+s.answers[o];r+="<a class='captcheck_answer_label' href='' tabindex='0' onClick='chooseAnswer(\""+i+'","'+s.answers[o]+"\"); return false;' onEnter='chooseAnswer(\""+i+'","'+s.answers[o]+"\"); return false;'><input id='captcheck_"+i+"_answer_"+s.answers[o]+"' type='radio' name='captcheck_selected_answer' value='"+s.answers[o]+"' /><img src='"+p+"' /></a>"}r+="</div>";var d=document.createElement("div");d.innerHTML=r+"<div class='captcheck_answer_access' id='captcheck_"+i+"_answer_access'></div>";var _=document.createElement("div");_.setAttribute("class","captcheck_label_message"),_.setAttribute("id","captcheck_"+i+"_label_message"),_.innerHTML="<span class='captcheck_question_image' id='captcheck_"+i+"_question_image'>"+s.question_i+"</span><span class='captcheck_question_access' id='captcheck_"+i+"_question_access'>"+s.question_a+"</span><a href='' class='captcheck_alt_question_button' onClick='switchMode(\""+i+"\"); return false;' onEnter='switchMode(\""+i+"\"); return false;' id='captcheck_"+i+"_alt_question_button' aria-label='Switch between image and text question' tabindex='0'>> Text mode</a>",n.appendChild(_),n.appendChild(d);var h=document.createElement("span");h.innerHTML="<input type='hidden' name='captcheck_session_code' value='"+s.session+"' />",n.appendChild(h)}else n.innerHTML="<span class='captcheck_error_message'>There was a problem loading the CAPTCHA.</span>"}},a.send()})};
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121
captcheck.js
121
captcheck.js
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@ -1,60 +1,87 @@
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window.onload = function () {
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var api_url = "https://captcheck.netsyms.com/api.php";
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var getJSON = function (url, callback) {
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/* Add custom styles */
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var styles = document.createElement('style');
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/* Remove newlines/comments from captcheck.css and put it here */
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styles.innerHTML = ".captcheck_box,.captcheck_label_message,.captcheck_label_message b{color:#000;font-family:Ubuntu,Arial,sans-serif}.captcheck_box{border:1px solid #e0e0e0;border-radius:3px;display:inline-block;padding:3px;margin:5px 2px 5px 1px;background-color:#f5f5f5}.captcheck_answer_label>input{visibility:hidden;position:absolute}.captcheck_answer_label>input+img{cursor:pointer;border:2px solid transparent;border-radius:3px;min-width:32px;width:18%;max-width:64px}.captcheck_answer_label>input:checked+img{cursor:pointer;border:2px solid #424242;border-radius:3px}.captcheck_error_message{color:red}.captcheck_question_image{display:initial}.captcheck_question_access{display:none}.captcheck_alt_question_button{float:right;font-size:80%;cursor:pointer;color:inherit;text-decoration:inherit}.captcheck_answer_images{display:initial}.captcheck_answer_access{display:none}";
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document.body.appendChild(styles);
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/* Loop over all the CAPTCHA containers on the page, setting up a different CAPTCHA in each */
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Array.prototype.forEach.call(document.getElementsByClassName("captcheck_container"), function (container) {
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var xhr = new XMLHttpRequest();
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xhr.open('GET', url, true);
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xhr.open('GET', api_url + "?action=new", true);
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xhr.onreadystatechange = function () {
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if (this.readyState == 4) {
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callback(this.status, this.responseText);
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var status = this.status;
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var json = this.responseText;
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/* Create captcha div */
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var captcha = document.createElement("div");
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captcha.setAttribute("class", "captcheck_box");
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container.appendChild(captcha);
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if (status == 200) {
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var data = JSON.parse(json);
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// ID prefix to use for this instance
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var idp = data.id_prefix;
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/* Create answer buttons */
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var answers = "<div class='captcheck_answer_images' id='captcheck_" + idp + "_answer_images'>";
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for (var i = 0, len = data.answers.length; i < len; i++) {
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var src = api_url + "?action=img&s=" + data.session + "&c=" + data.answers[i];
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answers += "<a class='captcheck_answer_label' href='' tabindex='0' onClick='chooseAnswer(\"" + idp + "\",\"" + data.answers[i] + "\"); return false;' onEnter='chooseAnswer(\"" + idp + "\",\"" + data.answers[i] + "\"); return false;'><input id='captcheck_" + idp + "_answer_" + data.answers[i] + "' type='radio' name='captcheck_selected_answer' value='" + data.answers[i] + "' /><img src='" + src + "' /></a>";
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}
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answers += "</div>";
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var answer_div = document.createElement("div");
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answer_div.innerHTML = answers + "<div class='captcheck_answer_access' id='captcheck_" + idp + "_answer_access'></div>";
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/* Create question */
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var question_div = document.createElement("div");
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question_div.setAttribute("class", "captcheck_label_message");
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question_div.setAttribute("id", "captcheck_" + idp + "_label_message")
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question_div.innerHTML = "<span class='captcheck_question_image' id='captcheck_" + idp + "_question_image'>" + data.question_i + "</span><span class='captcheck_question_access' id='captcheck_" + idp + "_question_access'>" + data.question_a + "</span><a href='' class='captcheck_alt_question_button' onClick='switchMode(\"" + idp + "\"); return false;' onEnter='switchMode(\"" + idp + "\"); return false;' id='captcheck_" + idp + "_alt_question_button' aria-label='Switch between image and text question' tabindex='0'>> Text mode</a>";
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/* Add question and answers */
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captcha.appendChild(question_div);
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captcha.appendChild(answer_div);
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/* Add hidden session ID element */
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var skey_input = document.createElement("span");
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skey_input.innerHTML = "<input type='hidden' name='captcheck_session_code' value='" + data.session + "' />";
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captcha.appendChild(skey_input);
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} else {
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/* Add error message */
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captcha.innerHTML = "<span class='captcheck_error_message'>There was a problem loading the CAPTCHA.</span>";
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}
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}
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};
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xhr.send();
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};
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getJSON(api_url + "?action=new", function (status, json) {
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/* Add custom styles */
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var styles = document.createElement('style');
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/* Remove newlines/comments from captcheck.css and put it here */
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styles.innerHTML = ".captcheck_box {font-family: Ubuntu, Arial, sans-serif; color: black; border: 1px solid #e0e0e0; border-radius: 3px; display: inline-block; padding: 3px; margin: 5px 2px 5px 1px; background-color: #f5f5f5;} .captcheck_label_message, .captcheck_label_message b {color: black; font-family: Ubuntu, Arial, sans-serif;} .captcheck_answer_label > input {visibility: hidden; position: absolute;} .captcheck_answer_label > input + img {cursor: pointer; border: 2px solid transparent; border-radius: 3px; min-width: 32px; width: 18%; max-width: 64px;} .captcheck_answer_label > input:checked + img {cursor: pointer; border: 2px solid #424242; border-radius: 3px;} .captcheck_error_message {color: red;}";
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document.body.appendChild(styles);
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/* Get captcha container div */
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var container = document.getElementById("captcheck_container");
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/* Create captcha div */
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var captcha = document.createElement("div");
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captcha.setAttribute("class", "captcheck_box");
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container.appendChild(captcha);
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if (status == 200) {
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var data = JSON.parse(json);
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/* Create answer buttons */
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var answers = "";
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for (var i = 0, len = data.answers.length; i < len; i++) {
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var src = api_url + "?action=img&s=" + data.session + "&c=" + data.answers[i];
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answers += "<span class='captcheck_answer_label' onclick='chooseAnswer(\"" + data.answers[i] + "\")'><input id='captcheck_answer_" + data.answers[i] + "' type='radio' name='captcheck_selected_answer' value='" + data.answers[i] + "' /><img src='" + src + "' /></span>";
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}
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var answer_div = document.createElement("div");
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answer_div.innerHTML = answers;
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/* Create question */
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var question_div = document.createElement("div");
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question_div.setAttribute("class", "captcheck_label_message");
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question_div.innerHTML = "Click on the <b>" + data.question + "</b>:";
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/* Add question and answers */
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captcha.appendChild(question_div);
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captcha.appendChild(answer_div);
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/* Add hidden session ID element */
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var skey_input = document.createElement("span");
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skey_input.innerHTML = "<input type='hidden' name='captcheck_session_code' value='" + data.session + "' />";
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captcha.appendChild(skey_input);
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} else {
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/* Add error message */
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captcha.innerHTML = "<span class='captcheck_error_message'>There was a problem loading the CAPTCHA.</span>";
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}
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});
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}
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function chooseAnswer(ans) {
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var box = document.getElementById("captcheck_answer_" + ans);
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function chooseAnswer(idp, ans) {
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var box = document.getElementById("captcheck_" + idp + "_answer_" + ans);
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box.checked = true;
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return false;
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}
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function switchMode(idp) {
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var switch_label = document.getElementById("captcheck_" + idp + "_alt_question_button");
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var img_q = document.getElementById("captcheck_" + idp + "_question_image");
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var acc_q = document.getElementById("captcheck_" + idp + "_question_access");
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var img_a = document.getElementById("captcheck_" + idp + "_answer_images");
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var acc_a = document.getElementById("captcheck_" + idp + "_answer_access");
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if (switch_label.innerHTML == "> Text mode") {
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switch_label.innerHTML = "> Image mode";
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img_q.style.display = "none";
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acc_q.style.display = "initial";
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img_a.style.display = "none";
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acc_a.style.display = "initial";
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acc_a.innerHTML = "<input type='text' name='captcheck_selected_answer' aria-label='Type your answer here.' autocomplete='off' autofill='off'/>";
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} else {
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switch_label.innerHTML = "> Text mode";
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img_q.style.display = "initial";
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acc_q.style.display = "none";
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img_a.style.display = "initial";
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acc_a.style.display = "none";
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acc_a.innerHTML = "";
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}
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}
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10
readme.md
10
readme.md
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@ -8,8 +8,8 @@ IE9+. Uses icons from Font-Awesome.
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How to use
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----------
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In your form, put an empty div with the ID "captcheck_container".
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Add `captcheck.js` into your page.
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In your form, put an empty div with the class "captcheck_container".
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Add `captcheck.js` (or `captcheck.dist.js`) into your page.
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<!DOCTYPE html>
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<html>
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@ -22,7 +22,7 @@ Add `captcheck.js` into your page.
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<body>
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<form action="submit.php">
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<input type="text" name="form_field" placeholder="Some random form field" />
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<div id="captcheck_container">
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<div class="captcheck_container">
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</div>
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<button type="submit">Submit Form</button>
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</form>
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@ -65,7 +65,7 @@ Execution Flow
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JS -> API: Request session ID, question, and answers (with scrambled random codes)
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API -> JS: Sends info, saves session ID, correct answer, and scrambled answer codes in DB
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JS -> API: Requests answer images by sending scrambled value and session ID
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JS -> FORM: Adds hidden field with value=session ID, displays question and images
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JS -> FORM: Adds hidden field with value=session ID, displays question and images (or text box)
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[USER SUBMITS FORM]
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SITE -> API: Sends session ID and scrambled answer
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SITE -> API: Sends session ID and answer
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API -> SITE: Responds with true/false to indicate if the answer is valid, marks session as expired to prevent CAPTCHA reuse
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@ -7,9 +7,9 @@
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<script src="captcheck.js"></script>
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</head>
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<body>
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<form action="submit.php" method="POST">
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<form action="test.php" method="POST">
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<input type="text" name="form_field" placeholder="Some random form field" />
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<div id="captcheck_container">
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<div class="captcheck_container">
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</div>
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<button type="submit">Submit Form</button>
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</form>
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