Переглянути джерело

Add accessible format, add support for multiple CAPTCHAS on a page (use class instead of id for container)

tags/v0.3^0
Skylar Ittner 2 роки тому
джерело
коміт
a62d1b85e0
6 змінених файлів з 131 додано та 61 видалено
  1. 25
    6
      api.php
  2. 24
    0
      captcheck.css
  3. 1
    1
      captcheck.dist.js
  4. 74
    47
      captcheck.js
  5. 5
    5
      readme.md
  6. 2
    2
      test.html

+ 25
- 6
api.php Переглянути файл

@@ -35,9 +35,15 @@ switch ($VARS['action']) {
$scrambled_insert[] = ["sid" => $sid, "aid" => $scrambled['real'][$i], "acode" => $scrambled['fake'][$i]];
}
$database->insert("scrambled_answers", $scrambled_insert);
$questions = ["Please click on the [].", "Click the [].", "Find the []."];
$accessible_questions = ["Please type [] here.", "Enter [] into the box.", "Type []."];
shuffle($questions);
shuffle($accessible_questions);
$resp = [
"session" => $skey,
"question" => $correct_answer['aname'],
"id_prefix" => substr(hash("md5", mt_rand()), 3, 5),
"question_i" => str_replace("[]", $correct_answer['aname'], $questions[0]),
"question_a" => str_replace("[]", $correct_answer['aname'], $accessible_questions[0]),
"answers" => $scrambled["fake"]
];
exit(json_encode($resp));
@@ -88,15 +94,28 @@ switch ($VARS['action']) {
echo json_encode(["session" => $VARS['session_id'], "result" => false, "msg" => "Session key already used."]);
exit();
}
if (!$database->has("scrambled_answers", ["AND" => ["sid" => $sid, "acode" => $VARS['answer_id']]])) {

$image = false;
if ($database->has("scrambled_answers", ["AND" => ["sid" => $sid, "acode" => $VARS['answer_id']]])) {
// Image maybe correct
$image = true;
} else if ($database->has("sessions", ["[>]answers" => ["aid" => "aid"]], ["AND" => ["sid" => $sid, "aname" => $VARS['answer_id']]])) {
// Accessible text correct
$image = false;
} else {
// Invalid answer
echo json_encode(["session" => $VARS['session_id'], "result" => false, "msg" => "Answer invalid."]);
exit();
}
$aid = $database->get('scrambled_answers', 'aid', ["AND" => ["sid" => $sid, "acode" => $VARS['answer_id']]]);
if ($database->has('sessions', ["AND" => ["sid" => $sid, "aid" => $aid]])) {
echo json_encode(["session" => $VARS['session_id'], "result" => true]);
if ($image) {
$aid = $database->get('scrambled_answers', 'aid', ["AND" => ["sid" => $sid, "acode" => $VARS['answer_id']]]);
if ($database->has('sessions', ["AND" => ["sid" => $sid, "aid" => $aid]])) {
echo json_encode(["session" => $VARS['session_id'], "result" => true]);
} else {
echo json_encode(["session" => $VARS['session_id'], "result" => false, "msg" => "Answer incorrect."]);
}
} else {
echo json_encode(["session" => $VARS['session_id'], "result" => false, "msg" => "Answer incorrect."]);
echo json_encode(["session" => $VARS['session_id'], "result" => true]);
}
$database->update("sessions", ['expired' => 1], ["sid" => $sid]);
exit();

+ 24
- 0
captcheck.css Переглянути файл

@@ -42,4 +42,28 @@ Don't use this file in your site; captcheck.js contains it.

.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;
}

+ 1
- 1
captcheck.dist.js Переглянути файл

@@ -1 +1 @@
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>"})};
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");"&gt; Text mode"==t.innerHTML?(t.innerHTML="&gt; 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="&gt; 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'>&gt; 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()})};

+ 74
- 47
captcheck.js Переглянути файл

@@ -1,60 +1,87 @@
window.onload = function () {
var api_url = "https://captcheck.netsyms.com/api.php";
var getJSON = function (url, callback) {

/* Add custom styles */
var styles = document.createElement('style');
/* Remove newlines/comments from captcheck.css and put it here */
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}";
document.body.appendChild(styles);

/* Loop over all the CAPTCHA containers on the page, setting up a different CAPTCHA in each */
Array.prototype.forEach.call(document.getElementsByClassName("captcheck_container"), function (container) {
var xhr = new XMLHttpRequest();
xhr.open('GET', url, true);
xhr.open('GET', api_url + "?action=new", true);
xhr.onreadystatechange = function () {
if (this.readyState == 4) {
callback(this.status, this.responseText);
}
};
xhr.send();
};
getJSON(api_url + "?action=new", function (status, json) {
/* Add custom styles */
var styles = document.createElement('style');
/* Remove newlines/comments from captcheck.css and put it here */
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;}";
document.body.appendChild(styles);
var status = this.status;
var json = this.responseText;
/* Create captcha div */
var captcha = document.createElement("div");
captcha.setAttribute("class", "captcheck_box");
container.appendChild(captcha);

/* Get captcha container div */
var container = document.getElementById("captcheck_container");
/* Create captcha div */
var captcha = document.createElement("div");
captcha.setAttribute("class", "captcheck_box");
container.appendChild(captcha);
if (status == 200) {
var data = JSON.parse(json);
/* Create answer buttons */
var answers = "";
for (var i = 0, len = data.answers.length; i < len; i++) {
var src = api_url + "?action=img&s=" + data.session + "&c=" + data.answers[i];
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>";
}
var answer_div = document.createElement("div");
answer_div.innerHTML = answers;
/* Create question */
var question_div = document.createElement("div");
question_div.setAttribute("class", "captcheck_label_message");
question_div.innerHTML = "Click on the <b>" + data.question + "</b>:";
if (status == 200) {
var data = JSON.parse(json);
// ID prefix to use for this instance
var idp = data.id_prefix;
/* Create answer buttons */
var answers = "<div class='captcheck_answer_images' id='captcheck_" + idp + "_answer_images'>";
for (var i = 0, len = data.answers.length; i < len; i++) {
var src = api_url + "?action=img&s=" + data.session + "&c=" + data.answers[i];
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>";
}
answers += "</div>";
var answer_div = document.createElement("div");
answer_div.innerHTML = answers + "<div class='captcheck_answer_access' id='captcheck_" + idp + "_answer_access'></div>";
/* Create question */
var question_div = document.createElement("div");
question_div.setAttribute("class", "captcheck_label_message");
question_div.setAttribute("id", "captcheck_" + idp + "_label_message")
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'>&gt; Text mode</a>";

/* Add question and answers */
captcha.appendChild(question_div);
captcha.appendChild(answer_div);
/* Add question and answers */
captcha.appendChild(question_div);
captcha.appendChild(answer_div);

/* Add hidden session ID element */
var skey_input = document.createElement("span");
skey_input.innerHTML = "<input type='hidden' name='captcheck_session_code' value='" + data.session + "' />";
captcha.appendChild(skey_input);
} else {
/* Add error message */
captcha.innerHTML = "<span class='captcheck_error_message'>There was a problem loading the CAPTCHA.</span>";
}
/* Add hidden session ID element */
var skey_input = document.createElement("span");
skey_input.innerHTML = "<input type='hidden' name='captcheck_session_code' value='" + data.session + "' />";
captcha.appendChild(skey_input);
} else {
/* Add error message */
captcha.innerHTML = "<span class='captcheck_error_message'>There was a problem loading the CAPTCHA.</span>";
}
}
};
xhr.send();
});
}

function chooseAnswer(ans) {
var box = document.getElementById("captcheck_answer_" + ans);
function chooseAnswer(idp, ans) {
var box = document.getElementById("captcheck_" + idp + "_answer_" + ans);
box.checked = true;
return false;
}

function switchMode(idp) {
var switch_label = document.getElementById("captcheck_" + idp + "_alt_question_button");
var img_q = document.getElementById("captcheck_" + idp + "_question_image");
var acc_q = document.getElementById("captcheck_" + idp + "_question_access");
var img_a = document.getElementById("captcheck_" + idp + "_answer_images");
var acc_a = document.getElementById("captcheck_" + idp + "_answer_access");
if (switch_label.innerHTML == "&gt; Text mode") {
switch_label.innerHTML = "&gt; Image mode";
img_q.style.display = "none";
acc_q.style.display = "initial";
img_a.style.display = "none";
acc_a.style.display = "initial";
acc_a.innerHTML = "<input type='text' name='captcheck_selected_answer' aria-label='Type your answer here.' autocomplete='off' autofill='off'/>";
} else {
switch_label.innerHTML = "&gt; Text mode";
img_q.style.display = "initial";
acc_q.style.display = "none";
img_a.style.display = "initial";
acc_a.style.display = "none";
acc_a.innerHTML = "";
}
}

+ 5
- 5
readme.md Переглянути файл

@@ -8,8 +8,8 @@ IE9+. Uses icons from Font-Awesome.
How to use
----------

In your form, put an empty div with the ID "captcheck_container".
Add `captcheck.js` into your page.
In your form, put an empty div with the class "captcheck_container".
Add `captcheck.js` (or `captcheck.dist.js`) into your page.

<!DOCTYPE html>
<html>
@@ -22,7 +22,7 @@ Add `captcheck.js` into your page.
<body>
<form action="submit.php">
<input type="text" name="form_field" placeholder="Some random form field" />
<div id="captcheck_container">
<div class="captcheck_container">
</div>
<button type="submit">Submit Form</button>
</form>
@@ -65,7 +65,7 @@ Execution Flow
JS -> API: Request session ID, question, and answers (with scrambled random codes)
API -> JS: Sends info, saves session ID, correct answer, and scrambled answer codes in DB
JS -> API: Requests answer images by sending scrambled value and session ID
JS -> FORM: Adds hidden field with value=session ID, displays question and images
JS -> FORM: Adds hidden field with value=session ID, displays question and images (or text box)
[USER SUBMITS FORM]
SITE -> API: Sends session ID and scrambled answer
SITE -> API: Sends session ID and answer
API -> SITE: Responds with true/false to indicate if the answer is valid, marks session as expired to prevent CAPTCHA reuse

+ 2
- 2
test.html Переглянути файл

@@ -7,9 +7,9 @@
<script src="captcheck.js"></script>
</head>
<body>
<form action="submit.php" method="POST">
<form action="test.php" method="POST">
<input type="text" name="form_field" placeholder="Some random form field" />
<div id="captcheck_container">
<div class="captcheck_container">
</div>
<button type="submit">Submit Form</button>
</form>

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