PrivateBin/js/privatebin.js

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2012-04-22 18:45:45 +08:00
/**
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* PrivateBin
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*
* a zero-knowledge paste bin
*
* @see {@link https://github.com/PrivateBin/PrivateBin}
* @copyright 2012 Sébastien SAUVAGE ({@link http://sebsauvage.net})
* @license {@link https://www.opensource.org/licenses/zlib-license.php The zlib/libpng License}
* @version 1.1
* @name PrivateBin
* @namespace
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*/
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'use strict';
/** global: Base64 */
/** global: FileReader */
/** global: RawDeflate */
/** global: history */
/** global: navigator */
/** global: prettyPrint */
/** global: prettyPrintOne */
/** global: showdown */
/** global: sjcl */
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// Immediately start random number generator collector.
sjcl.random.startCollectors();
jQuery.PrivateBin = function($, sjcl, Base64, RawDeflate) {
/**
* static helper methods
*
* @name helper
* @class
*/
var helper = {
/**
* converts a duration (in seconds) into human friendly approximation
*
* @name helper.secondsToHuman
* @function
* @param {number} seconds
* @return {Array}
*/
secondsToHuman: function(seconds)
{
var v;
if (seconds < 60)
{
v = Math.floor(seconds);
return [v, 'second'];
}
if (seconds < 60 * 60)
{
v = Math.floor(seconds / 60);
return [v, 'minute'];
}
if (seconds < 60 * 60 * 24)
{
v = Math.floor(seconds / (60 * 60));
return [v, 'hour'];
}
// If less than 2 months, display in days:
if (seconds < 60 * 60 * 24 * 60)
{
v = Math.floor(seconds / (60 * 60 * 24));
return [v, 'day'];
}
v = Math.floor(seconds / (60 * 60 * 24 * 30));
return [v, 'month'];
},
/**
* text range selection
*
* @see {@link https://stackoverflow.com/questions/985272/jquery-selecting-text-in-an-element-akin-to-highlighting-with-your-mouse}
* @name helper.selectText
* @function
* @param {string} element - Indentifier of the element to select (id="")
*/
selectText: function(element)
{
var doc = document,
text = doc.getElementById(element),
range,
selection;
// MS
if (doc.body.createTextRange)
{
range = doc.body.createTextRange();
range.moveToElementText(text);
range.select();
}
// all others
else if (window.getSelection)
{
selection = window.getSelection();
range = doc.createRange();
range.selectNodeContents(text);
selection.removeAllRanges();
selection.addRange(range);
}
},
/**
* set text of a DOM element (required for IE),
* this is equivalent to element.text(text)
*
* @name helper.setElementText
* @function
* @param {Object} element - a DOM element
* @param {string} text - the text to enter
*/
setElementText: function(element, text)
{
// For IE<10: Doesn't support white-space:pre-wrap; so we have to do this...
if ($('#oldienotice').is(':visible')) {
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var html = this.htmlEntities(text).replace(/\n/ig, '\r\n<br>');
element.html('<pre>' + html + '</pre>');
}
// for other (sane) browsers:
else
{
element.text(text);
}
},
/**
* replace last child of element with message
*
* @name helper.setMessage
* @function
* @param {Object} element - a jQuery wrapped DOM element
* @param {string} message - the message to append
*/
setMessage: function(element, message)
{
var content = element.contents();
if (content.length > 0)
{
content[content.length - 1].nodeValue = ' ' + message;
}
else
{
this.setElementText(element, message);
}
},
/**
* convert URLs to clickable links.
* URLs to handle:
* <pre>
* magnet:?xt.1=urn:sha1:YNCKHTQCWBTRNJIV4WNAE52SJUQCZO5C&xt.2=urn:sha1:TXGCZQTH26NL6OUQAJJPFALHG2LTGBC7
* http://example.com:8800/zero/?6f09182b8ea51997#WtLEUO5Epj9UHAV9JFs+6pUQZp13TuspAUjnF+iM+dM=
* http://user:example.com@localhost:8800/zero/?6f09182b8ea51997#WtLEUO5Epj9UHAV9JFs+6pUQZp13TuspAUjnF+iM+dM=
* </pre>
*
* @name helper.urls2links
* @function
* @param {Object} element - a jQuery DOM element
*/
urls2links: function(element)
{
var markup = '<a href="$1" rel="nofollow">$1</a>';
element.html(
element.html().replace(
/((http|https|ftp):\/\/[\w?=&.\/-;#@~%+-]+(?![\w\s?&.\/;#~%"=-]*>))/ig,
markup
)
);
element.html(
element.html().replace(
/((magnet):[\w?=&.\/-;#@~%+-]+)/ig,
markup
)
);
},
/**
* minimal sprintf emulation for %s and %d formats
*
* @see {@link https://stackoverflow.com/questions/610406/javascript-equivalent-to-printf-string-format#4795914}
* @name helper.sprintf
* @function
* @param {string} format
* @param {...*} args - one or multiple parameters injected into format string
* @return {string}
*/
sprintf: function()
{
var args = arguments;
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if (typeof arguments[0] === 'object')
{
args = arguments[0];
}
var format = args[0],
i = 1;
return format.replace(/%((%)|s|d)/g, function (m) {
// m is the matched format, e.g. %s, %d
var val;
if (m[2]) {
val = m[2];
} else {
val = args[i];
// A switch statement so that the formatter can be extended.
switch (m)
{
case '%d':
val = parseFloat(val);
if (isNaN(val)) {
val = 0;
}
break;
default:
// Default is %s
}
++i;
}
return val;
});
},
/**
* get value of cookie, if it was set, empty string otherwise
*
* @see {@link http://www.w3schools.com/js/js_cookies.asp}
* @name helper.getCookie
* @function
* @param {string} cname
* @return {string}
*/
getCookie: function(cname) {
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var name = cname + '=',
ca = document.cookie.split(';');
for (var i = 0; i < ca.length; ++i) {
var c = ca[i];
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while (c.charAt(0) === ' ')
{
c = c.substring(1);
}
if (c.indexOf(name) === 0)
{
return c.substring(name.length, c.length);
}
}
return '';
},
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/**
* get the current script location (without search or hash part of the URL),
* eg. http://example.com/path/?aaaa#bbbb --> http://example.com/path/
*
* @name helper.scriptLocation
* @function
* @return {string} current script location
*/
scriptLocation: function()
{
var scriptLocation = window.location.href.substring(
0,
window.location.href.length - window.location.search.length - window.location.hash.length
),
hashIndex = scriptLocation.indexOf('?');
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if (hashIndex !== -1)
{
scriptLocation = scriptLocation.substring(0, hashIndex);
}
return scriptLocation;
},
/**
* get the pastes unique identifier from the URL,
* eg. http://example.com/path/?c05354954c49a487#c05354954c49a487 returns c05354954c49a487
*
* @name helper.pasteId
* @function
* @return {string} unique identifier
*/
pasteId: function()
{
return window.location.search.substring(1);
},
/**
* return the deciphering key stored in anchor part of the URL
*
* @name helper.pageKey
* @function
* @return {string} key
*/
pageKey: function()
{
var key = window.location.hash.substring(1),
i = key.indexOf('&');
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// Some web 2.0 services and redirectors add data AFTER the anchor
// (such as &utm_source=...). We will strip any additional data.
if (i > -1)
{
key = key.substring(0, i);
}
return key;
},
/**
* convert all applicable characters to HTML entities
*
* @see {@link https://www.owasp.org/index.php/XSS_(Cross_Site_Scripting)_Prevention_Cheat_Sheet#RULE_.231_-_HTML_Escape_Before_Inserting_Untrusted_Data_into_HTML_Element_Content}
* @name helper.htmlEntities
* @function
* @param {string} str
* @return {string} escaped HTML
*/
htmlEntities: function(str) {
return String(str).replace(
/[&<>"'`=\/]/g, function(s) {
return helper.entityMap[s];
});
},
/**
* character to HTML entity lookup table
*
* @see {@link https://github.com/janl/mustache.js/blob/master/mustache.js#L60}
* @name helper.entityMap
* @enum {Object}
* @readonly
*/
entityMap: {
'&': '&amp;',
'<': '&lt;',
'>': '&gt;',
'"': '&quot;',
"'": '&#39;',
'/': '&#x2F;',
'`': '&#x60;',
'=': '&#x3D;'
}
};
/**
* internationalization methods
*
* @name i18n
* @class
*/
var i18n = {
/**
* supported languages, minus the built in 'en'
*
* @name i18n.supportedLanguages
* @prop {string[]}
* @readonly
*/
supportedLanguages: ['de', 'es', 'fr', 'it', 'no', 'pl', 'oc', 'ru', 'sl', 'zh'],
/**
* translate a string, alias for i18n.translate()
*
* @name i18n._
* @function
* @param {string} messageId
* @param {...*} args - one or multiple parameters injected into placeholders
* @return {string}
*/
_: function()
{
return this.translate(arguments);
},
/**
* translate a string
*
* @name i18n.translate
* @function
* @param {string} messageId
* @param {...*} args - one or multiple parameters injected into placeholders
* @return {string}
*/
translate: function()
{
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var args = arguments, messageId;
if (typeof arguments[0] === 'object')
{
args = arguments[0];
}
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var usesPlurals = $.isArray(args[0]);
if (usesPlurals)
{
// use the first plural form as messageId, otherwise the singular
messageId = (args[0].length > 1 ? args[0][1] : args[0][0]);
}
else
{
messageId = args[0];
}
if (messageId.length === 0)
{
return messageId;
}
if (!this.translations.hasOwnProperty(messageId))
{
if (this.language !== 'en')
{
console.debug(
'Missing ' + this.language + ' translation for: ' + messageId
);
}
this.translations[messageId] = args[0];
}
if (usesPlurals && $.isArray(this.translations[messageId]))
{
var n = parseInt(args[1] || 1, 10),
key = this.getPluralForm(n),
maxKey = this.translations[messageId].length - 1;
if (key > maxKey)
{
key = maxKey;
}
args[0] = this.translations[messageId][key];
args[1] = n;
}
else
{
args[0] = this.translations[messageId];
}
return helper.sprintf(args);
},
/**
* per language functions to use to determine the plural form
*
* @see {@link http://localization-guide.readthedocs.org/en/latest/l10n/pluralforms.html}
* @name i18n.getPluralForm
* @function
* @param {number} n
* @return {number} array key
*/
getPluralForm: function(n) {
switch (this.language)
{
case 'fr':
case 'oc':
case 'zh':
return (n > 1 ? 1 : 0);
case 'pl':
return (n === 1 ? 0 : (n % 10 >= 2 && n %10 <=4 && (n % 100 < 10 || n % 100 >= 20) ? 1 : 2));
case 'ru':
return (n % 10 === 1 && n % 100 !== 11 ? 0 : (n % 10 >= 2 && n % 10 <= 4 && (n % 100 < 10 || n % 100 >= 20) ? 1 : 2));
case 'sl':
return (n % 100 === 1 ? 1 : (n % 100 === 2 ? 2 : (n % 100 === 3 || n % 100 === 4 ? 3 : 0)));
// de, en, es, it, no
default:
return (n !== 1 ? 1 : 0);
}
},
/**
* load translations into cache, then trigger controller initialization
*
* @name i18n.loadTranslations
* @function
*/
loadTranslations: function()
{
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var language = helper.getCookie('lang');
if (language.length === 0)
{
language = (navigator.language || navigator.userLanguage).substring(0, 2);
}
// note that 'en' is built in, so no translation is necessary
if (i18n.supportedLanguages.indexOf(language) === -1)
{
controller.init();
}
else
{
$.getJSON('i18n/' + language + '.json', function(data) {
i18n.language = language;
i18n.translations = data;
controller.init();
});
}
},
/**
* built in language
*
* @name i18n.language
* @prop {string}
*/
language: 'en',
/**
* translation cache
*
* @name i18n.translations
* @enum {Object}
*/
translations: {}
};
/**
* filter methods
*
* @name filter
* @class
*/
var filter = {
/**
* compress a message (deflate compression), returns base64 encoded data
*
* @name filter.compress
* @function
* @param {string} message
* @return {string} base64 data
*/
compress: function(message)
{
return Base64.toBase64( RawDeflate.deflate( Base64.utob(message) ) );
},
/**
* decompress a message compressed with filter.compress()
*
* @name filter.decompress
* @function
* @param {string} data - base64 data
* @return {string} message
*/
decompress: function(data)
{
return Base64.btou( RawDeflate.inflate( Base64.fromBase64(data) ) );
},
/**
* compress, then encrypt message with given key and password
*
* @name filter.cipher
* @function
* @param {string} key
* @param {string} password
* @param {string} message
* @return {string} data - JSON with encrypted data
*/
cipher: function(key, password, message)
{
// Galois Counter Mode, keysize 256 bit, authentication tag 128 bit
var options = {mode: 'gcm', ks: 256, ts: 128};
if ((password || '').trim().length === 0)
{
return sjcl.encrypt(key, this.compress(message), options);
}
return sjcl.encrypt(key + sjcl.codec.hex.fromBits(sjcl.hash.sha256.hash(password)), this.compress(message), options);
},
/**
* decrypt message with key, then decompress
*
* @name filter.decipher
* @function
* @param {string} key
* @param {string} password
* @param {string} data - JSON with encrypted data
* @return {string} decrypted message
*/
decipher: function(key, password, data)
{
if (data !== undefined)
{
try
{
return this.decompress(sjcl.decrypt(key, data));
}
catch(err)
{
try
{
return this.decompress(sjcl.decrypt(key + sjcl.codec.hex.fromBits(sjcl.hash.sha256.hash(password)), data));
}
catch(e)
{}
}
}
return '';
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}
};
/**
* PrivateBin logic
*
* @name controller
* @class
*/
var controller = {
/**
* headers to send in AJAX requests
*
* @name controller.headers
* @enum {Object}
*/
headers: {'X-Requested-With': 'JSONHttpRequest'},
/**
* URL shortners create address
*
* @name controller.shortenerUrl
* @prop {string}
*/
shortenerUrl: '',
/**
* URL of newly created paste
*
* @name controller.createdPasteUrl
* @prop {string}
*/
createdPasteUrl: '',
/**
* ask the user for the password and set it
*
* @name controller.requestPassword
* @function
*/
requestPassword: function()
{
if (this.passwordModal.length === 0) {
var password = prompt(i18n._('Please enter the password for this paste:'), '');
if (password === null)
{
throw 'password prompt canceled';
}
if (password.length === 0)
{
this.requestPassword();
} else {
this.passwordInput.val(password);
this.displayMessages();
}
} else {
this.passwordModal.modal();
}
},
/**
* use given format on paste, defaults to plain text
*
* @name controller.formatPaste
* @function
* @param {string} format
* @param {string} text
*/
formatPaste: function(format, text)
{
helper.setElementText(this.clearText, text);
helper.setElementText(this.prettyPrint, text);
switch (format || 'plaintext')
{
case 'markdown':
if (typeof showdown === 'object')
{
var converter = new showdown.Converter({
strikethrough: true,
tables: true,
tablesHeaderId: true
});
this.clearText.html(
converter.makeHtml(text)
);
// add table classes from bootstrap css
this.clearText.find('table').addClass('table-condensed table-bordered');
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this.clearText.removeClass('hidden');
}
this.prettyMessage.addClass('hidden');
break;
case 'syntaxhighlighting':
if (typeof prettyPrintOne === 'function')
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{
if (typeof prettyPrint === 'function')
{
prettyPrint();
}
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this.prettyPrint.html(
prettyPrintOne(
helper.htmlEntities(text), null, true
)
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);
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}
// fall through, as the rest is the same
default:
// convert URLs to clickable links
helper.urls2links(this.clearText);
helper.urls2links(this.prettyPrint);
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this.clearText.addClass('hidden');
if (format === 'plaintext')
{
this.prettyPrint.css('white-space', 'pre-wrap');
this.prettyPrint.css('word-break', 'normal');
this.prettyPrint.removeClass('prettyprint');
}
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this.prettyMessage.removeClass('hidden');
}
},
/**
* show decrypted text in the display area, including discussion (if open)
*
* @name controller.displayMessages
* @function
* @param {Object} [paste] - (optional) object including comments to display (items = array with keys ('data','meta'))
*/
displayMessages: function(paste)
{
paste = paste || $.parseJSON(this.cipherData.text());
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var key = helper.pageKey(),
password = this.passwordInput.val();
if (!this.prettyPrint.hasClass('prettyprinted')) {
// Try to decrypt the paste.
try
{
if (paste.attachment)
{
var attachment = filter.decipher(key, password, paste.attachment);
if (attachment.length === 0)
{
if (password.length === 0)
{
this.requestPassword();
return;
}
attachment = filter.decipher(key, password, paste.attachment);
}
if (attachment.length === 0)
{
throw 'failed to decipher attachment';
}
if (paste.attachmentname)
{
var attachmentname = filter.decipher(key, password, paste.attachmentname);
if (attachmentname.length > 0)
{
this.attachmentLink.attr('download', attachmentname);
}
}
this.attachmentLink.attr('href', attachment);
this.attachment.removeClass('hidden');
// if the attachment is an image, display it
var imagePrefix = 'data:image/';
if (attachment.substring(0, imagePrefix.length) === imagePrefix)
{
this.image.html(
$(document.createElement('img'))
.attr('src', attachment)
.attr('class', 'img-thumbnail')
);
this.image.removeClass('hidden');
}
}
var cleartext = filter.decipher(key, password, paste.data);
if (cleartext.length === 0 && password.length === 0 && !paste.attachment)
{
this.requestPassword();
return;
}
if (cleartext.length === 0 && !paste.attachment)
{
throw 'failed to decipher message';
}
this.passwordInput.val(password);
if (cleartext.length > 0)
{
$('#pasteFormatter').val(paste.meta.formatter);
this.formatPaste(paste.meta.formatter, cleartext);
}
}
catch(err)
{
this.stateOnlyNewPaste();
this.showError(i18n._('Could not decrypt data (Wrong key?)'));
return;
}
}
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// display paste expiration / for your eyes only
if (paste.meta.expire_date)
{
var expiration = helper.secondsToHuman(paste.meta.remaining_time),
expirationLabel = [
'This document will expire in %d ' + expiration[1] + '.',
'This document will expire in %d ' + expiration[1] + 's.'
];
helper.setMessage(this.remainingTime, i18n._(expirationLabel, expiration[0]));
this.remainingTime.removeClass('foryoureyesonly')
.removeClass('hidden');
}
if (paste.meta.burnafterreading)
{
// unfortunately many web servers don't support DELETE (and PUT) out of the box
$.ajax({
type: 'POST',
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url: helper.scriptLocation() + '?' + helper.pasteId(),
data: {deletetoken: 'burnafterreading'},
dataType: 'json',
headers: this.headers
})
.fail(function() {
controller.showError(i18n._('Could not delete the paste, it was not stored in burn after reading mode.'));
});
helper.setMessage(this.remainingTime, i18n._(
'FOR YOUR EYES ONLY. Don\'t close this window, this message can\'t be displayed again.'
));
this.remainingTime.addClass('foryoureyesonly')
.removeClass('hidden');
// discourage cloning (as it can't really be prevented)
this.cloneButton.addClass('hidden');
}
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// if the discussion is opened on this paste, display it
if (paste.meta.opendiscussion)
{
this.comments.html('');
// iterate over comments
for (var i = 0; i < paste.comments.length; ++i)
{
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var place = this.comments,
comment = paste.comments[i],
commenttext = filter.decipher(key, password, comment.data),
// if parent comment exists, display below (CSS will automatically shift it to the right)
cname = '#comment_' + comment.parentid,
divComment = $('<article><div class="comment" id="comment_' + comment.id
+ '"><div class="commentmeta"><span class="nickname"></span>'
+ '<span class="commentdate"></span></div>'
+ '<div class="commentdata"></div>'
+ '<button class="btn btn-default btn-sm">'
+ i18n._('Reply') + '</button></div></article>'),
divCommentData = divComment.find('div.commentdata');
// if the element exists in page
if ($(cname).length)
{
place = $(cname);
}
divComment.find('button').click({commentid: comment.id}, $.proxy(this.openReply, this));
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helper.setElementText(divCommentData, commenttext);
helper.urls2links(divCommentData);
// try to get optional nickname
var nick = filter.decipher(key, password, comment.meta.nickname);
if (nick.length > 0)
{
divComment.find('span.nickname').text(nick);
}
else
{
divComment.find('span.nickname').html('<i>' + i18n._('Anonymous') + '</i>');
}
divComment.find('span.commentdate')
.text(' (' + (new Date(comment.meta.postdate * 1000).toLocaleString()) + ')')
.attr('title', 'CommentID: ' + comment.id);
// if an avatar is available, display it
if (comment.meta.vizhash)
{
divComment.find('span.nickname')
.before(
'<img src="' + comment.meta.vizhash + '" class="vizhash" title="' +
i18n._('Anonymous avatar (Vizhash of the IP address)') + '" /> '
);
}
place.append(divComment);
}
var divComment = $(
'<div class="comment"><button class="btn btn-default btn-sm">' +
i18n._('Add comment') + '</button></div>'
);
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divComment.find('button').click({commentid: helper.pasteId()}, $.proxy(this.openReply, this));
this.comments.append(divComment);
this.discussion.removeClass('hidden');
}
},
/**
* open the comment entry when clicking the "Reply" button of a comment
*
* @name controller.openReply
* @function
* @param {Event} event
*/
openReply: function(event)
{
event.preventDefault();
// remove any other reply area
$('div.reply').remove();
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var source = $(event.target),
commentid = event.data.commentid,
hint = i18n._('Optional nickname...'),
reply = $(
'<div class="reply"><input type="text" id="nickname" ' +
'class="form-control" title="' + hint + '" placeholder="' +
hint + '" /><textarea id="replymessage" class="replymessage ' +
'form-control" cols="80" rows="7"></textarea><br />' +
'<div id="replystatus"></div><button id="replybutton" ' +
'class="btn btn-default btn-sm">' + i18n._('Post comment') +
'</button></div>'
);
reply.find('button').click(
{parentid: commentid},
$.proxy(this.sendComment, this)
);
source.after(reply);
this.replyStatus = $('#replystatus');
$('#replymessage').focus();
},
/**
* send a reply in a discussion
*
* @name controller.sendComment
* @function
* @param {Event} event
*/
sendComment: function(event)
{
event.preventDefault();
this.errorMessage.addClass('hidden');
// do not send if no data
var replyMessage = $('#replymessage');
if (replyMessage.val().length === 0)
{
return;
}
this.showStatus(i18n._('Sending comment...'), true);
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var parentid = event.data.parentid,
key = helper.pageKey(),
cipherdata = filter.cipher(key, this.passwordInput.val(), replyMessage.val()),
ciphernickname = '',
nick = $('#nickname').val();
if (nick.length > 0)
{
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ciphernickname = filter.cipher(key, this.passwordInput.val(), nick);
}
var data_to_send = {
data: cipherdata,
parentid: parentid,
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pasteid: helper.pasteId(),
nickname: ciphernickname
};
$.ajax({
type: 'POST',
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url: helper.scriptLocation(),
data: data_to_send,
dataType: 'json',
headers: this.headers,
success: function(data)
{
if (data.status === 0)
{
controller.showStatus(i18n._('Comment posted.'));
$.ajax({
type: 'GET',
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url: helper.scriptLocation() + '?' + helper.pasteId(),
dataType: 'json',
headers: controller.headers,
success: function(data)
{
if (data.status === 0)
{
controller.displayMessages(data);
}
else if (data.status === 1)
{
controller.showError(i18n._('Could not refresh display: %s', data.message));
}
else
{
controller.showError(i18n._('Could not refresh display: %s', i18n._('unknown status')));
}
}
})
.fail(function() {
controller.showError(i18n._('Could not refresh display: %s', i18n._('server error or not responding')));
});
}
else if (data.status === 1)
{
controller.showError(i18n._('Could not post comment: %s', data.message));
}
else
{
controller.showError(i18n._('Could not post comment: %s', i18n._('unknown status')));
}
}
})
.fail(function() {
controller.showError(i18n._('Could not post comment: %s', i18n._('server error or not responding')));
});
},
/**
* send a new paste to server
*
* @name controller.sendData
* @function
* @param {Event} event
*/
sendData: function(event)
{
event.preventDefault();
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var file = document.getElementById('file'),
files = (file && file.files) ? file.files : null; // FileList object
// do not send if no data.
if (this.message.val().length === 0 && !(files && files[0]))
{
return;
}
// if sjcl has not collected enough entropy yet, display a message
if (!sjcl.random.isReady())
{
this.showStatus(i18n._('Sending paste (Please move your mouse for more entropy)...'), true);
sjcl.random.addEventListener('seeded', function() {
this.sendData(event);
});
return;
}
$('.navbar-toggle').click();
this.password.addClass('hidden');
this.showStatus(i18n._('Sending paste...'), true);
this.stateSubmittingPaste();
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var randomkey = sjcl.codec.base64.fromBits(sjcl.random.randomWords(8, 0), 0),
password = this.passwordInput.val();
if(files && files[0])
{
if(typeof FileReader === undefined)
{
// revert loading status…
this.stateNewPaste();
this.showError(i18n._('Your browser does not support uploading encrypted files. Please use a newer browser.'));
return;
}
var reader = new FileReader();
// closure to capture the file information
reader.onload = (function(theFile)
{
return function(e) {
controller.sendDataContinue(
randomkey,
filter.cipher(randomkey, password, e.target.result),
filter.cipher(randomkey, password, theFile.name)
);
};
})(files[0]);
reader.readAsDataURL(files[0]);
}
else if(this.attachmentLink.attr('href'))
{
this.sendDataContinue(
randomkey,
filter.cipher(randomkey, password, this.attachmentLink.attr('href')),
this.attachmentLink.attr('download')
);
}
else
{
this.sendDataContinue(randomkey, '', '');
}
},
/**
* send a new paste to server, step 2
*
* @name controller.sendDataContinue
* @function
* @param {string} randomkey
* @param {string} cipherdata_attachment
* @param {string} cipherdata_attachment_name
*/
sendDataContinue: function(randomkey, cipherdata_attachment, cipherdata_attachment_name)
{
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var cipherdata = filter.cipher(randomkey, this.passwordInput.val(), this.message.val()),
data_to_send = {
data: cipherdata,
expire: $('#pasteExpiration').val(),
formatter: $('#pasteFormatter').val(),
burnafterreading: this.burnAfterReading.is(':checked') ? 1 : 0,
opendiscussion: this.openDiscussion.is(':checked') ? 1 : 0
};
if (cipherdata_attachment.length > 0)
{
data_to_send.attachment = cipherdata_attachment;
if (cipherdata_attachment_name.length > 0)
{
data_to_send.attachmentname = cipherdata_attachment_name;
}
}
$.ajax({
type: 'POST',
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url: helper.scriptLocation(),
data: data_to_send,
dataType: 'json',
headers: this.headers,
success: function(data)
{
if (data.status === 0) {
controller.stateExistingPaste();
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var url = helper.scriptLocation() + '?' + data.id + '#' + randomkey,
deleteUrl = helper.scriptLocation() + '?pasteid=' + data.id + '&deletetoken=' + data.deletetoken;
controller.showStatus('');
controller.errorMessage.addClass('hidden');
// show new URL in browser bar
history.pushState({type: 'newpaste'}, document.title, url);
$('#pastelink').html(
i18n._(
'Your paste is <a id="pasteurl" href="%s">%s</a> <span id="copyhint">(Hit [Ctrl]+[c] to copy)</span>',
url, url
) + controller.shortenUrl(url)
);
// save newly created element
controller.pasteUrl = $('#pasteurl');
// and add click event
controller.pasteUrl.click($.proxy(controller.pasteLinkClick, controller));
var shortenButton = $('#shortenbutton');
if (shortenButton) {
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shortenButton.click($.proxy(controller.sendToShortener, controller));
}
$('#deletelink').html('<a href="' + deleteUrl + '">' + i18n._('Delete data') + '</a>');
controller.pasteResult.removeClass('hidden');
// we pre-select the link so that the user only has to [Ctrl]+[c] the link
helper.selectText('pasteurl');
controller.showStatus('');
controller.formatPaste(data_to_send.formatter, controller.message.val());
}
else if (data.status === 1)
{
// revert loading status…
controller.stateNewPaste();
controller.showError(i18n._('Could not create paste: %s', data.message));
}
else
{
// revert loading status…
controller.stateNewPaste();
controller.showError(i18n._('Could not create paste: %s', i18n._('unknown status')));
}
}
})
.fail(function()
{
// revert loading status…
this.stateNewPaste();
controller.showError(i18n._('Could not create paste: %s', i18n._('server error or not responding')));
});
},
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/**
* check if a URL shortener was defined and create HTML containing a link to it
*
* @name controller.shortenUrl
* @function
* @param {string} url
* @return {string} html
*/
shortenUrl: function(url)
{
var shortenerHtml = $('#shortenbutton');
if (shortenerHtml) {
this.shortenerUrl = shortenerHtml.data('shortener');
this.createdPasteUrl = url;
return ' ' + $('<div />').append(shortenerHtml.clone()).html();
}
return '';
},
/**
* put the screen in "New paste" mode
*
* @name controller.stateNewPaste
* @function
*/
stateNewPaste: function()
{
this.message.text('');
this.attachment.addClass('hidden');
this.cloneButton.addClass('hidden');
this.rawTextButton.addClass('hidden');
this.remainingTime.addClass('hidden');
this.pasteResult.addClass('hidden');
this.clearText.addClass('hidden');
this.discussion.addClass('hidden');
this.prettyMessage.addClass('hidden');
this.loadingIndicator.addClass('hidden');
this.sendButton.removeClass('hidden');
this.expiration.removeClass('hidden');
this.formatter.removeClass('hidden');
this.burnAfterReadingOption.removeClass('hidden');
this.openDisc.removeClass('hidden');
this.newButton.removeClass('hidden');
this.password.removeClass('hidden');
this.attach.removeClass('hidden');
this.message.removeClass('hidden');
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this.preview.removeClass('hidden');
this.message.focus();
},
/**
* put the screen in mode after submitting a paste
*
* @name controller.stateSubmittingPaste
* @function
*/
stateSubmittingPaste: function()
{
this.message.text('');
this.attachment.addClass('hidden');
this.cloneButton.addClass('hidden');
this.rawTextButton.addClass('hidden');
this.remainingTime.addClass('hidden');
this.pasteResult.addClass('hidden');
this.clearText.addClass('hidden');
this.discussion.addClass('hidden');
this.prettyMessage.addClass('hidden');
this.sendButton.addClass('hidden');
this.expiration.addClass('hidden');
this.formatter.addClass('hidden');
this.burnAfterReadingOption.addClass('hidden');
this.openDisc.addClass('hidden');
this.newButton.addClass('hidden');
this.password.addClass('hidden');
this.attach.addClass('hidden');
this.message.addClass('hidden');
this.preview.addClass('hidden');
this.loadingIndicator.removeClass('hidden');
},
/**
* put the screen in a state where the only option is to submit a
* new paste
*
* @name controller.stateOnlyNewPaste
* @function
*/
stateOnlyNewPaste: function()
{
this.message.text('');
this.attachment.addClass('hidden');
this.cloneButton.addClass('hidden');
this.rawTextButton.addClass('hidden');
this.remainingTime.addClass('hidden');
this.pasteResult.addClass('hidden');
this.clearText.addClass('hidden');
this.discussion.addClass('hidden');
this.prettyMessage.addClass('hidden');
this.sendButton.addClass('hidden');
this.expiration.addClass('hidden');
this.formatter.addClass('hidden');
this.burnAfterReadingOption.addClass('hidden');
this.openDisc.addClass('hidden');
this.password.addClass('hidden');
this.attach.addClass('hidden');
this.message.addClass('hidden');
this.preview.addClass('hidden');
this.loadingIndicator.addClass('hidden');
this.newButton.removeClass('hidden');
},
/**
* put the screen in "Existing paste" mode
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*
* @name controller.stateExistingPaste
* @function
* @param {boolean} [preview=false] - (optional) tell if the preview tabs should be displayed, defaults to false
*/
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stateExistingPaste: function(preview)
{
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preview = preview || false;
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if (!preview)
{
// no "clone" for IE<10.
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if ($('#oldienotice').is(":visible"))
{
this.cloneButton.addClass('hidden');
}
else
{
this.cloneButton.removeClass('hidden');
}
this.rawTextButton.removeClass('hidden');
this.sendButton.addClass('hidden');
this.attach.addClass('hidden');
this.expiration.addClass('hidden');
this.formatter.addClass('hidden');
this.burnAfterReadingOption.addClass('hidden');
this.openDisc.addClass('hidden');
this.newButton.removeClass('hidden');
this.preview.addClass('hidden');
}
this.pasteResult.addClass('hidden');
this.message.addClass('hidden');
this.clearText.addClass('hidden');
this.prettyMessage.addClass('hidden');
this.loadingIndicator.addClass('hidden');
},
/**
* when "burn after reading" is checked, disable discussion
*
* @name controller.changeBurnAfterReading
* @function
*/
changeBurnAfterReading: function()
{
if (this.burnAfterReading.is(':checked') )
{
this.openDisc.addClass('buttondisabled');
this.openDiscussion.attr({checked: false, disabled: true});
}
else
{
this.openDisc.removeClass('buttondisabled');
this.openDiscussion.removeAttr('disabled');
}
},
/**
* when discussion is checked, disable "burn after reading"
*
* @name controller.changeOpenDisc
* @function
*/
changeOpenDisc: function()
{
if (this.openDiscussion.is(':checked') )
{
this.burnAfterReadingOption.addClass('buttondisabled');
this.burnAfterReading.attr({checked: false, disabled: true});
}
else
{
this.burnAfterReadingOption.removeClass('buttondisabled');
this.burnAfterReading.removeAttr('disabled');
}
},
/**
* forward to URL shortener
*
* @name controller.sendToShortener
* @function
* @param {Event} event
*/
sendToShortener: function(event)
{
event.preventDefault();
window.location.href = this.shortenerUrl + encodeURIComponent(this.createdPasteUrl);
},
/**
* reload the page
*
* This takes the user to the PrivateBin home page.
*
* @name controller.reloadPage
* @function
* @param {Event} event
*/
reloadPage: function(event)
{
event.preventDefault();
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window.location.href = helper.scriptLocation();
},
/**
* return raw text
*
* @name controller.rawText
* @function
* @param {Event} event
*/
rawText: function(event)
{
event.preventDefault();
var paste = $('#pasteFormatter').val() === 'markdown' ?
this.prettyPrint.text() : this.clearText.text();
history.pushState(
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null, document.title, helper.scriptLocation() + '?' +
helper.pasteId() + '#' + helper.pageKey()
);
// we use text/html instead of text/plain to avoid a bug when
// reloading the raw text view (it reverts to type text/html)
var newDoc = document.open('text/html', 'replace');
newDoc.write('<pre>' + helper.htmlEntities(paste) + '</pre>');
newDoc.close();
},
/**
* clone the current paste
*
* @name controller.clonePaste
* @function
* @param {Event} event
*/
clonePaste: function(event)
{
event.preventDefault();
this.stateNewPaste();
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// erase the id and the key in url
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history.replaceState(null, document.title, helper.scriptLocation());
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this.showStatus('');
if (this.attachmentLink.attr('href'))
{
this.clonedFile.removeClass('hidden');
this.fileWrap.addClass('hidden');
}
this.message.text(
$('#pasteFormatter').val() === 'markdown' ?
this.prettyPrint.text() : this.clearText.text()
);
$('.navbar-toggle').click();
},
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/**
* set the expiration on bootstrap templates
*
* @name controller.setExpiration
* @function
* @param {Event} event
*/
setExpiration: function(event)
{
event.preventDefault();
var target = $(event.target);
$('#pasteExpiration').val(target.data('expiration'));
$('#pasteExpirationDisplay').text(target.text());
},
/**
* set the format on bootstrap templates
*
* @name controller.setFormat
* @function
* @param {Event} event
*/
setFormat: function(event)
{
event.preventDefault();
var target = $(event.target);
$('#pasteFormatter').val(target.data('format'));
$('#pasteFormatterDisplay').text(target.text());
if (this.messagePreview.parent().hasClass('active')) {
this.viewPreview(event);
}
},
/**
* set the language in a cookie and reload the page
*
* @name controller.setLanguage
* @function
* @param {Event} event
*/
setLanguage: function(event)
{
document.cookie = 'lang=' + $(event.target).data('lang');
this.reloadPage(event);
},
/**
* support input of tab character
*
* @name controller.supportTabs
* @function
* @param {Event} event
*/
supportTabs: function(event)
{
var keyCode = event.keyCode || event.which;
// tab was pressed
if (keyCode === 9)
{
// prevent the textarea to lose focus
event.preventDefault();
// get caret position & selection
var val = this.value,
start = this.selectionStart,
end = this.selectionEnd;
// set textarea value to: text before caret + tab + text after caret
this.value = val.substring(0, start) + '\t' + val.substring(end);
// put caret at right position again
this.selectionStart = this.selectionEnd = start + 1;
}
},
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/**
* view the editor tab
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*
* @name controller.viewEditor
* @function
* @param {Event} event
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*/
viewEditor: function(event)
{
event.preventDefault();
this.messagePreview.parent().removeClass('active');
this.messageEdit.parent().addClass('active');
this.message.focus();
this.stateNewPaste();
},
/**
* view the preview tab
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*
* @name controller.viewPreview
* @function
* @param {Event} event
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*/
viewPreview: function(event)
{
event.preventDefault();
this.messageEdit.parent().removeClass('active');
this.messagePreview.parent().addClass('active');
this.message.focus();
this.stateExistingPaste(true);
this.formatPaste($('#pasteFormatter').val(), this.message.val());
},
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/**
* handle history (pop) state changes
*
* currently this does only handle redirects to the home page.
*
* @name controller.historyChange
* @function
* @param {Event} event
*/
historyChange: function(event)
{
var currentLocation = helper.scriptLocation();
if (event.originalEvent.state === null && // no state object passed
event.originalEvent.target.location.href === currentLocation && // target location is home page
window.location.href === currentLocation // and we are not already on the home page
) {
// redirect to home page
window.location.href = currentLocation;
}
},
/**
* Forces opening the paste if the link does not do this automatically.
*
* This is necessary as browsers will not reload the page when it is
* already loaded (which is fake as it is set via history.pushState()).
*
* @name controller.pasteLinkClick
* @function
* @param {Event} event
*/
pasteLinkClick: function(event)
{
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// check if location is (already) shown in URL bar
if (window.location.href === this.pasteUrl.attr('href')) {
// if so we need to load link by reloading the current site
window.location.reload(true);
}
},
/**
* create a new paste
*
* @name controller.newPaste
* @function
*/
newPaste: function()
{
this.stateNewPaste();
this.showStatus('');
this.message.text('');
this.changeBurnAfterReading();
this.changeOpenDisc();
},
/**
* removes an attachment
*
* @name controller.removeAttachment
* @function
*/
removeAttachment: function()
{
this.clonedFile.addClass('hidden');
// removes the saved decrypted file data
this.attachmentLink.attr('href', '');
// the only way to deselect the file is to recreate the input
this.fileWrap.html(this.fileWrap.html());
this.fileWrap.removeClass('hidden');
},
/**
* decrypt using the password from the modal dialog
*
* @name controller.decryptPasswordModal
* @function
*/
decryptPasswordModal: function()
{
this.passwordInput.val(this.passwordDecrypt.val());
this.displayMessages();
},
/**
* submit a password in the modal dialog
*
* @name controller.submitPasswordModal
* @function
* @param {Event} event
*/
submitPasswordModal: function(event)
{
event.preventDefault();
this.passwordModal.modal('hide');
},
/**
* display an error message,
* we use the same function for paste and reply to comments
*
* @name controller.showError
* @function
* @param {string} message - text to display
*/
showError: function(message)
{
if (this.status.length)
{
this.status.addClass('errorMessage').text(message);
}
else
{
this.errorMessage.removeClass('hidden');
helper.setMessage(this.errorMessage, message);
}
if (typeof this.replyStatus !== 'undefined') {
this.replyStatus.addClass('errorMessage');
this.replyStatus.addClass(this.errorMessage.attr('class'));
if (this.status.length)
{
this.replyStatus.html(this.status.html());
}
else
{
this.replyStatus.html(this.errorMessage.html());
}
}
},
/**
* display a status message,
* we use the same function for paste and reply to comments
*
* @name controller.showStatus
* @function
* @param {string} message - text to display
* @param {boolean} [spin=false] - (optional) tell if the "spinning" animation should be displayed, defaults to false
*/
showStatus: function(message, spin)
{
if (spin || false)
{
var img = '<img src="img/busy.gif" style="width:16px;height:9px;margin:0 4px 0 0;" />';
this.status.prepend(img);
if (typeof this.replyStatus !== 'undefined') {
this.replyStatus.prepend(img);
}
}
if (typeof this.replyStatus !== 'undefined') {
this.replyStatus.removeClass('errorMessage').text(message);
}
if (!message)
{
this.status.html(' ');
return;
}
if (message === '')
{
this.status.html(' ');
return;
}
this.status.removeClass('errorMessage').text(message);
},
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/**
* bind events to DOM elements
*
* @name controller.bindEvents
* @function
*/
bindEvents: function()
{
this.burnAfterReading.change($.proxy(this.changeBurnAfterReading, this));
this.openDisc.change($.proxy(this.changeOpenDisc, this));
this.sendButton.click($.proxy(this.sendData, this));
this.cloneButton.click($.proxy(this.clonePaste, this));
this.rawTextButton.click($.proxy(this.rawText, this));
this.fileRemoveButton.click($.proxy(this.removeAttachment, this));
$('.reloadlink').click($.proxy(this.reloadPage, this));
this.message.keydown(this.supportTabs);
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this.messageEdit.click($.proxy(this.viewEditor, this));
this.messagePreview.click($.proxy(this.viewPreview, this));
// bootstrap template drop downs
$('ul.dropdown-menu li a', $('#expiration').parent()).click($.proxy(this.setExpiration, this));
$('ul.dropdown-menu li a', $('#formatter').parent()).click($.proxy(this.setFormat, this));
$('#language ul.dropdown-menu li a').click($.proxy(this.setLanguage, this));
// page template drop down
$('#language select option').click($.proxy(this.setLanguage, this));
// handle modal password request on decryption
this.passwordModal.on('shown.bs.modal', $.proxy(this.passwordDecrypt.focus, this));
this.passwordModal.on('hidden.bs.modal', $.proxy(this.decryptPasswordModal, this));
this.passwordForm.submit($.proxy(this.submitPasswordModal, this));
$(window).on('popstate', $.proxy(this.historyChange, this));
},
/**
* main application
*
* @name controller.init
* @function
*/
init: function()
{
// hide "no javascript" message
$('#noscript').hide();
// preload jQuery wrapped DOM elements and bind events
this.attach = $('#attach');
this.attachment = $('#attachment');
this.attachmentLink = $('#attachment a');
this.burnAfterReading = $('#burnafterreading');
this.burnAfterReadingOption = $('#burnafterreadingoption');
this.cipherData = $('#cipherdata');
this.clearText = $('#cleartext');
this.cloneButton = $('#clonebutton');
this.clonedFile = $('#clonedfile');
this.comments = $('#comments');
this.discussion = $('#discussion');
this.errorMessage = $('#errormessage');
this.expiration = $('#expiration');
this.fileRemoveButton = $('#fileremovebutton');
this.fileWrap = $('#filewrap');
this.formatter = $('#formatter');
this.image = $('#image');
this.loadingIndicator = $('#loadingindicator');
this.message = $('#message');
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this.messageEdit = $('#messageedit');
this.messagePreview = $('#messagepreview');
this.newButton = $('#newbutton');
this.openDisc = $('#opendisc');
this.openDiscussion = $('#opendiscussion');
this.password = $('#password');
this.passwordInput = $('#passwordinput');
this.passwordModal = $('#passwordmodal');
this.passwordForm = $('#passwordform');
this.passwordDecrypt = $('#passworddecrypt');
this.pasteResult = $('#pasteresult');
// this.pasteUrl is saved in sendDataContinue() if/after it is
// actually created
this.prettyMessage = $('#prettymessage');
this.prettyPrint = $('#prettyprint');
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this.preview = $('#preview');
this.rawTextButton = $('#rawtextbutton');
this.remainingTime = $('#remainingtime');
this.sendButton = $('#sendbutton');
this.status = $('#status');
this.bindEvents();
// display status returned by php code, if any (eg. paste was properly deleted)
if (this.status.text().length > 0)
{
this.showStatus(this.status.text());
return;
}
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// keep line height even if content empty
this.status.html(' ');
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// display an existing paste
if (this.cipherData.text().length > 1)
{
// missing decryption key in URL?
if (window.location.hash.length === 0)
{
this.showError(i18n._('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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// show proper elements on screen
this.stateExistingPaste();
this.displayMessages();
}
// display error message from php code
else if (this.errorMessage.text().length > 1)
{
this.showError(this.errorMessage.text());
}
// create a new paste
else
{
this.newPaste();
}
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}
}
/**
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* main application start, called when DOM is fully loaded and
* runs controller initalization after translations are loaded
*/
$(i18n.loadTranslations);
return {
helper: helper,
i18n: i18n,
filter: filter,
controller: controller
};
}(jQuery, sjcl, Base64, RawDeflate);