PrivateBin/js/zerobin.js

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/**
* ZeroBin
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*
* a zero-knowledge paste bin
*
* @link http://sebsauvage.net/wiki/doku.php?id=php:zerobin
* @copyright 2012 Sébastien SAUVAGE (sebsauvage.net)
* @license http://www.opensource.org/licenses/zlib-license.php The zlib/libpng License
* @version 0.19
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*/
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// Immediately start random number generator collector.
sjcl.random.startCollectors();
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/**
* Converts a duration (in seconds) into human readable format.
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*
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* @param int seconds
* @return string
*/
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function secondsToHuman(seconds)
{
if (seconds<60) { var v=Math.floor(seconds); return v+' second'+((v>1)?'s':''); }
if (seconds<60*60) { var v=Math.floor(seconds/60); return v+' minute'+((v>1)?'s':''); }
if (seconds<60*60*24) { var v=Math.floor(seconds/(60*60)); return v+' hour'+((v>1)?'s':''); }
// If less than 2 months, display in days:
if (seconds<60*60*24*60) { var v=Math.floor(seconds/(60*60*24)); return v+' day'+((v>1)?'s':''); }
var v=Math.floor(seconds/(60*60*24*30)); return v+' month'+((v>1)?'s':'');
}
/**
* Converts an associative array to an encoded string
* for appending to the anchor.
*
* @param object associative_array Object to be serialized
* @return string
*/
function hashToParameterString(associativeArray)
{
var parameterString = ""
for (key in associativeArray)
{
if( parameterString === "" )
{
parameterString = encodeURIComponent(key);
parameterString += "=" + encodeURIComponent(associativeArray[key]);
} else {
parameterString += "&" + encodeURIComponent(key);
parameterString += "=" + encodeURIComponent(associativeArray[key]);
}
}
//padding for URL shorteners
parameterString += "&p=p";
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return parameterString;
}
/**
* Converts a string to an associative array.
*
* @param string parameter_string String containing parameters
* @return object
*/
function parameterStringToHash(parameterString)
{
var parameterHash = {};
var parameterArray = parameterString.split("&");
for (var i = 0; i < parameterArray.length; i++) {
//var currentParamterString = decodeURIComponent(parameterArray[i]);
var pair = parameterArray[i].split("=");
var key = decodeURIComponent(pair[0]);
var value = decodeURIComponent(pair[1]);
parameterHash[key] = value;
}
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return parameterHash;
}
/**
* Get an associative array of the parameters found in the anchor
*
* @return object
**/
function getParameterHash()
{
var hashIndex = window.location.href.indexOf("#");
if (hashIndex >= 0) {
return parameterStringToHash(window.location.href.substring(hashIndex + 1));
} else {
return {};
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}
}
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/**
* Compress a message (deflate compression). Returns base64 encoded data.
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*
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* @param string message
* @return base64 string data
*/
function compress(message) {
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return Base64.toBase64( RawDeflate.deflate( Base64.utob(message) ) );
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}
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/**
* Decompress a message compressed with compress().
*/
function decompress(data) {
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return Base64.btou( RawDeflate.inflate( Base64.fromBase64(data) ) );
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}
/**
* Compress, then encrypt message with key.
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*
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* @param string key
* @param string message
* @return encrypted string data
*/
function zeroCipher(key, message) {
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return sjcl.encrypt(key,compress(message));
}
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/**
* Decrypt message with key, then decompress.
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*
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* @param key
* @param encrypted string data
* @return string readable message
*/
function zeroDecipher(key, data) {
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return decompress(sjcl.decrypt(key,data));
}
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/**
* @return the current script location (without search or hash part of the URL).
* eg. http://server.com/zero/?aaaa#bbbb --> http://server.com/zero/
*/
function scriptLocation() {
var scriptLocation = window.location.href.substring(0,window.location.href.length
- window.location.search.length - window.location.hash.length);
var hashIndex = scriptLocation.indexOf("#");
if (hashIndex !== -1) {
scriptLocation = scriptLocation.substring(0, hashIndex)
}
return scriptLocation
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}
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/**
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* @return the paste unique identifier from the URL
* eg. 'c05354954c49a487'
*/
function pasteID() {
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return window.location.search.substring(1);
}
function htmlEntities(str) {
return String(str).replace(/&/g, '&amp;').replace(/</g, '&lt;').replace(/>/g, '&gt;').replace(/"/g, '&quot;');
}
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/**
* Set text of a DOM element (required for IE)
* This is equivalent to element.text(text)
* @param object element : a DOM element.
* @param string text : the text to enter.
*/
function setElementText(element, text) {
// For IE<10.
if ($('#oldienotice').is(":visible")) {
// IE<10 does not support white-space:pre-wrap; so we have to do this BIG UGLY STINKING THING.
var html = htmlEntities(text).replace(/\n/ig,"\r\n<br>");
element.html('<pre>'+html+'</pre>');
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}
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// for other (sane) browsers:
else {
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element.text(text);
}
}
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/**
* Show decrypted text in the display area, including discussion (if open)
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*
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* @param string key : decryption key
* @param array comments : Array of messages to display (items = array with keys ('data','meta')
*/
function displayMessages(key, comments) {
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try { // Try to decrypt the paste.
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var cleartext = zeroDecipher(key, comments[0].data);
} catch(err) {
$('#cleartext').addClass('hidden');
$('#prettymessage').addClass('hidden');
$('#clonebutton').addClass('hidden');
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showError('Could not decrypt data (Wrong key ?)');
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return;
}
setElementText($('#cleartext'), cleartext);
setElementText($('#prettyprint'), cleartext);
urls2links($('#cleartext')); // Convert URLs to clickable links.
prettyPrint();
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// Display paste expiration.
if (comments[0].meta.expire_date) $('#remainingtime').removeClass('foryoureyesonly').text('This document will expire in '+secondsToHuman(comments[0].meta.remaining_time)+'.').removeClass('hidden');
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if (comments[0].meta.burnafterreading) {
$('#remainingtime').addClass('foryoureyesonly').text('FOR YOUR EYES ONLY. Don\'t close this window, this message can\'t be displayed again.').removeClass('hidden');
$('#clonebutton').addClass('hidden'); // Discourage cloning (as it can't really be prevented).
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}
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// If the discussion is opened on this paste, display it.
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if (comments[0].meta.opendiscussion) {
$('#comments').html('');
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// For each comment.
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for (var i = 1; i < comments.length; i++) {
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var comment=comments[i];
var cleartext="[Could not decrypt comment ; Wrong key ?]";
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try {
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cleartext = zeroDecipher(key, comment.data);
} catch(err) { }
var place = $('#comments');
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// If parent comment exists, display below (CSS will automatically shift it right.)
var cname = '#comment_'+comment.meta.parentid
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// If the element exists in page
if ($(cname).length) {
place = $(cname);
}
var divComment = $('<article><div class="comment" id="comment_' + comment.meta.commentid+'">'
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+ '<div class="commentmeta"><span class="nickname"></span><span class="commentdate"></span></div><div class="commentdata"></div>'
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+ '<button onclick="open_reply($(this),\'' + comment.meta.commentid + '\');return false;" class="btn btn-default">Reply</button>'
+ '</div></article>');
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setElementText(divComment.find('div.commentdata'), cleartext);
// Convert URLs to clickable links in comment.
urls2links(divComment.find('div.commentdata'));
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divComment.find('span.nickname').html('<i>(Anonymous)</i>');
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// Try to get optional nickname:
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try {
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divComment.find('span.nickname').text(zeroDecipher(key, comment.meta.nickname));
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} catch(err) { }
divComment.find('span.commentdate').text(' ('+(new Date(comment.meta.postdate*1000).toString())+')').attr('title','CommentID: ' + comment.meta.commentid);
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// If an avatar is available, display it.
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if (comment.meta.vizhash) {
divComment.find('span.nickname').before('<img src="' + comment.meta.vizhash + '" class="vizhash" title="Anonymous avatar (Vizhash of the IP address)" />');
}
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place.append(divComment);
}
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$('#comments').append('<div class="comment"><button onclick="open_reply($(this),\'' + pasteID() + '\');return false;" class="btn btn-default">Add comment</button></div>');
$('#discussion').removeClass('hidden');
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}
}
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/**
* Open the comment entry when clicking the "Reply" button of a comment.
* @param object source : element which emitted the event.
* @param string commentid = identifier of the comment we want to reply to.
*/
function open_reply(source, commentid) {
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$('div.reply').remove(); // Remove any other reply area.
source.after('<div class="reply">'
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+ '<input type="text" id="nickname" class="form-control" title="Optional nickname..." value="Optional nickname..." />'
+ '<textarea id="replymessage" class="replymessage form-control" cols="80" rows="7"></textarea>'
+ '<br /><button id="replybutton" onclick="send_comment(\'' + commentid + '\');return false;" class="btn btn-default">Post comment</button>'
+ '<div id="replystatus"> </div>'
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+ '</div>');
$('#nickname').focus(function() {
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if ($(this).val() == $(this).attr('title')) {
$(this).val('');
}
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});
$('#replymessage').focus();
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}
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/**
* Send a reply in a discussion.
* @param string parentid : the comment identifier we want to send a reply to.
*/
function send_comment(parentid) {
// Do not send if no data.
if ($('#replymessage').val().length==0) {
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return;
}
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showStatus('Sending comment...', spin=true);
var cipherdata = zeroCipher(pageKey(), $('#replymessage').val());
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var ciphernickname = '';
var nick=$('#nickname').val();
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if (nick != '' && nick != 'Optional nickname...') {
ciphernickname = zeroCipher(pageKey(), nick);
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}
var data_to_send = { data:cipherdata,
parentid: parentid,
pasteid: pasteID(),
nickname: ciphernickname
};
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$.post(scriptLocation(), data_to_send, 'json')
.error(function() {
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showError('Comment could not be sent (server error or not responding).');
})
.success(function(data) {
if (data.status == 0) {
showStatus('Comment posted.');
location.reload();
}
else if (data.status==1) {
showError('Could not post comment: '+data.message);
}
else {
showError('Could not post comment.');
}
});
}
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/**
* Send a new paste to server
*/
function send_data() {
// Do not send if no data.
if ($('#message').val().length == 0) {
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return;
}
// If sjcl has not collected enough entropy yet, display a message.
if (!sjcl.random.isReady())
{
showStatus('Sending paste (Please move your mouse for more entropy)...', spin=true);
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sjcl.random.addEventListener('seeded', function(){ send_data(); });
return;
}
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showStatus('Sending paste...', spin=true);
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var randomkey = sjcl.codec.base64.fromBits(sjcl.random.randomWords(8, 0), 0);
var cipherdata = zeroCipher(randomkey, $('#message').val());
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var data_to_send = { data: cipherdata,
expire: $('#pasteExpiration').val(),
burnafterreading: $('#burnafterreading').is(':checked') ? 1 : 0,
opendiscussion: $('#opendiscussion').is(':checked') ? 1 : 0
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};
$.post(scriptLocation(), data_to_send, 'json')
.error(function() {
showError('Data could not be sent (serveur error or not responding).');
})
.success(function(data) {
if (data.status == 0) {
stateExistingPaste();
var url = scriptLocation() + "?" + data.id + '#' + randomkey;
var deleteUrl = scriptLocation() + "?pasteid=" + data.id + '&deletetoken=' + data.deletetoken;
showStatus('');
$('#pastelink').html('Your paste is <a id="pasteurl" href="' + url + '">' + url + '</a> <span id="copyhint">(Hit CTRL+C to copy)</span>');
$('#deletelink').html('<a href="' + deleteUrl + '">Delete data</a>');
$('#pasteresult').removeClass('hidden');
selectText('pasteurl'); // We pre-select the link so that the user only has to CTRL+C the link.
setElementText($('#cleartext'), $('#message').val());
setElementText($('#prettyprint'), $('#message').val());
urls2links($('#cleartext'));
showStatus('');
prettyPrint();
}
else if (data.status==1) {
showError('Could not create paste: '+data.message);
}
else {
showError('Could not create paste.');
}
});
}
/** Text range selection.
* From: http://stackoverflow.com/questions/985272/jquery-selecting-text-in-an-element-akin-to-highlighting-with-your-mouse
* @param string element : Indentifier of the element to select (id="").
*/
function selectText(element) {
var doc = document
, text = doc.getElementById(element)
, range, selection
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;
if (doc.body.createTextRange) { //ms
range = doc.body.createTextRange();
range.moveToElementText(text);
range.select();
} else if (window.getSelection) { //all others
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selection = window.getSelection();
range = doc.createRange();
range.selectNodeContents(text);
selection.removeAllRanges();
selection.addRange(range);
}
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}
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/**
* Put the screen in "New paste" mode.
*/
function stateNewPaste() {
$('#sendbutton').removeClass('hidden');
$('#clonebutton').addClass('hidden');
$('#rawtextbutton').addClass('hidden');
$('#expiration').removeClass('hidden');
$('#remainingtime').addClass('hidden');
$('#burnafterreadingoption').removeClass('hidden');
$('#opendisc').removeClass('hidden');
$('#newbutton').removeClass('hidden');
$('#pasteresult').addClass('hidden');
$('#message').text('');
$('#message').removeClass('hidden');
$('#cleartext').addClass('hidden');
$('#message').focus();
$('#discussion').addClass('hidden');
$('#prettymessage').addClass('hidden');
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}
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/**
* Put the screen in "Existing paste" mode.
*/
function stateExistingPaste() {
$('#sendbutton').addClass('hidden');
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// No "clone" for IE<10.
if ($('#oldienotice').is(":visible")) {
$('#clonebutton').addClass('hidden');
}
else {
$('#clonebutton').removeClass('hidden');
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}
$('#rawtextbutton').removeClass('hidden');
$('#expiration').addClass('hidden');
$('#burnafterreadingoption').addClass('hidden');
$('#opendisc').addClass('hidden');
$('#newbutton').removeClass('hidden');
$('#pasteresult').addClass('hidden');
$('#message').addClass('hidden');
$('#cleartext').addClass('hidden');
$('#prettymessage').removeClass('hidden');
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}
/** Return raw text
*/
function rawText()
{
var paste = $('#cleartext').html();
var newDoc = document.open('text/html', 'replace');
newDoc.write('<pre>'+paste+'</pre>');
newDoc.close();
}
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/**
* Clone the current paste.
*/
function clonePaste() {
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stateNewPaste();
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//Erase the id and the key in url
history.replaceState(document.title, document.title, scriptLocation());
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showStatus('');
$('#message').text($('#cleartext').text());
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}
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/**
* Create a new paste.
*/
function newPaste() {
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stateNewPaste();
showStatus('');
$('#message').text('');
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}
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/**
* Display an error message
* (We use the same function for paste and reply to comments)
*/
function showError(message) {
$('#status').addClass('errorMessage').text(message);
$('#replystatus').addClass('errorMessage').text(message);
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}
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/**
* Display status
* (We use the same function for paste and reply to comments)
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*
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* @param string message : text to display
* @param boolean spin (optional) : tell if the "spinning" animation should be displayed.
*/
function showStatus(message, spin) {
$('#replystatus').removeClass('errorMessage');
$('#replystatus').text(message);
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if (!message) {
$('#status').html(' ');
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return;
}
if (message == '') {
$('#status').html(' ');
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return;
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}
$('#status').removeClass('errorMessage');
$('#status').text(message);
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if (spin) {
var img = '<img src="img/busy.gif" style="width:16px;height:9px;margin:0px 4px 0px 0px;" />';
$('#status').prepend(img);
$('#replystatus').prepend(img);
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}
}
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/**
* Convert URLs to clickable links.
* URLs to handle:
* <code>
* magnet:?xt.1=urn:sha1:YNCKHTQCWBTRNJIV4WNAE52SJUQCZO5C&xt.2=urn:sha1:TXGCZQTH26NL6OUQAJJPFALHG2LTGBC7
* http://localhost:8800/zero/?6f09182b8ea51997#WtLEUO5Epj9UHAV9JFs+6pUQZp13TuspAUjnF+iM+dM=
* http://user:password@localhost:8800/zero/?6f09182b8ea51997#WtLEUO5Epj9UHAV9JFs+6pUQZp13TuspAUjnF+iM+dM=
* </code>
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*
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* @param object element : a jQuery DOM element.
* @FIXME: add ppa & apt links.
*/
function urls2links(element) {
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var re = /((http|https|ftp):\/\/[\w?=&.\/-;#@~%+-]+(?![\w\s?&.\/;#~%"=-]*>))/ig;
element.html(element.html().replace(re,'<a href="$1" rel="nofollow">$1</a>'));
var re = /((magnet):[\w?=&.\/-;#@~%+-]+)/ig;
element.html(element.html().replace(re,'<a href="$1">$1</a>'));
}
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/**
* Return the deciphering key stored in anchor part of the URL
*/
function pageKey() {
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var key = window.location.hash.substring(1); // Get key
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// Some stupid web 2.0 services and redirectors add data AFTER the anchor
// (such as &utm_source=...).
// We will strip any additional data.
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// First, strip everything after the equal sign (=) which signals end of base64 string.
i = key.indexOf('='); if (i>-1) { key = key.substring(0,i+1); }
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// If the equal sign was not present, some parameters may remain:
i = key.indexOf('&'); if (i>-1) { key = key.substring(0,i); }
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// Then add trailing equal sign if it's missing
if (key.charAt(key.length-1)!=='=') key+='=';
return key;
}
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$(function() {
// hide "no javascript" message
$('#noscript').hide();
// If "burn after reading" is checked, disable discussion.
$('#burnafterreading').change(function() {
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if ($(this).is(':checked') ) {
$('#opendisc').addClass('buttondisabled');
$('#opendiscussion').attr({checked: false});
$('#opendiscussion').attr('disabled',true);
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}
else {
$('#opendisc').removeClass('buttondisabled');
$('#opendiscussion').removeAttr('disabled');
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}
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});
// Display status returned by php code if any (eg. Paste was properly deleted.)
if ($('#status').text().length > 0) {
showStatus($('#status').text(),false);
return;
}
$('#status').html(' '); // Keep line height even if content empty.
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// Display an existing paste
if ($('#cipherdata').text().length > 1) {
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// Missing decryption key in URL ?
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if (window.location.hash.length == 0) {
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showError('Cannot decrypt paste: Decryption key missing in URL (Did you use a redirector or an URL shortener which strips part of the URL ?)');
return;
}
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// List of messages to display
var messages = jQuery.parseJSON($('#cipherdata').text());
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// Show proper elements on screen.
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stateExistingPaste();
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displayMessages(pageKey(), messages);
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}
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// Display error message from php code.
else if ($('#errormessage').text().length>1) {
showError($('#errormessage').text());
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}
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// Create a new paste.
else {
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newPaste();
}
});