yannstatic/static/2019/12/25/Fail2ban.html

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<article itemscope itemtype="http://schema.org/Article"><div class="article__header"><header><h1 style="color:Tomato;">Fail2ban</h1></header></div><meta itemprop="headline" content="Fail2ban"><div class="article__info clearfix"><ul class="left-col menu"><li>
2024-11-08 14:10:33 +01:00
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<i class="far fa-calendar-alt"></i>&nbsp;<span title="Création" style="color:#FF00FF">25&nbsp;déc.&nbsp;&nbsp;2019</span>
<span title="Modification" style="color:#00FF7F">27&nbsp;sept.&nbsp;2022</span></li></ul></div><meta itemprop="datePublished" content="2022-09-27T00:00:00+02:00">
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<summary><b>Afficher/cacher Sommaire</b></summary>
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</details><h2 id="fail2ban">Fail2ban</h2>
<p><img src="/images/fail2ban.png" alt="Fail2ban" /></p>
<p><em>Fail2ban lit des fichiers de log et bannit les adresses IP qui ont obtenu un trop grand nombre déchecs lors de lauthentification. Il met à jour les règles du pare-feu pour rejeter cette adresse IP. Ces règles peuvent êtres défines par lutilisateur.</em></p>
<p>Les commandes sont exécutées en mode su sudo</p>
<p>Installation</p>
<div class="language-plaintext highlighter-rouge"><div class="highlight"><pre class="highlight"><code>apt install fail2ban
</code></pre></div></div>
<p><strong>fail2ban.conf</strong></p>
<p>Rien à faire dans le fichier <strong>/etc/fail2ban/fail2ban.conf</strong>, vous pouvez laisser les options par défaut</p>
<p><strong>jail.conf</strong></p>
<p>Copier la configuration par défaut afin quelle ne soit pas supprimée en cas de mise à jour.</p>
<div class="language-plaintext highlighter-rouge"><div class="highlight"><pre class="highlight"><code>cp /etc/fail2ban/jail.conf /etc/fail2ban/jail.local
</code></pre></div></div>
<p>Ce fichier est beaucoup plus intéressant, il contient tous les services à monitorer, et vous allez le découvrir, fail2ban ne se limite pas à SSH…</p>
<div class="language-plaintext highlighter-rouge"><div class="highlight"><pre class="highlight"><code>nano /etc/fail2ban/jail.local
</code></pre></div></div>
<blockquote>
<p>Tous les commentaires ont été supprimés pour allèger le fichier.<br />
Les commentaires sont visibles dans le fichier original <strong>jail.conf</strong></p>
</blockquote>
<div class="language-plaintext highlighter-rouge"><div class="highlight"><pre class="highlight"><code>[INCLUDES]
before = paths-debian.conf
[DEFAULT]
ignoreip = 127.0.0.1/8
bantime = 600
findtime = 600
maxretry = 3
backend = auto
usedns = warn
logencoding = auto
filter = %(__name__)s
destemail = root@localhost
sender = root@localhost
mta = sendmail
protocol = tcp
chain = INPUT
port = 0:65535
fail2ban_agent = Fail2Ban/%(fail2ban_version)s
banaction = iptables-multiport
banaction_allports = iptables-allports
protocol="%(protocol)s", chain="%(chain)s"]
action_mw = %(banaction)s[name=%(__name__)s, bantime="%(bantime)s", port="%(port)s", protocol="%(protocol)s", chain="%(chain)s"]
%(mta)s-whois[name=%(__name__)s, sender="%(sender)s", dest="%(destemail)s", protocol="%(protocol)s", chain="%(chain)s"]
action_mwl = %(banaction)s[name=%(__name__)s, bantime="%(bantime)s", port="%(port)s", protocol="%(protocol)s", chain="%(chain)s"]
%(mta)s-whois-lines[name=%(__name__)s, sender="%(sender)s", dest="%(destemail)s", logpath=%(logpath)s, chain="%(chain)s"]
action_xarf = %(banaction)s[name=%(__name__)s, bantime="%(bantime)s", port="%(port)s", protocol="%(protocol)s", chain="%(chain)s"]
xarf-login-attack[service=%(__name__)s, sender="%(sender)s", logpath=%(logpath)s, port="%(port)s"]
action_cf_mwl = cloudflare[cfuser="%(cfemail)s", cftoken="%(cfapikey)s"]
%(mta)s-whois-lines[name=%(__name__)s, sender="%(sender)s", dest="%(destemail)s", logpath=%(logpath)s, chain="%(chain)s"]
action_blocklist_de = blocklist_de[email="%(sender)s", service=%(filter)s, apikey="%(blocklist_de_apikey)s", agent="%(fail2ban_agent)s"]
action_badips = badips.py[category="%(__name__)s", banaction="%(banaction)s", agent="%(fail2ban_agent)s"]
action_badips_report = badips[category="%(__name__)s", agent="%(fail2ban_agent)s"]
action = %(action_)s
</code></pre></div></div>
<p>Pour envoyer un mail contenant le whois, placez la variable sur :</p>
<div class="language-plaintext highlighter-rouge"><div class="highlight"><pre class="highlight"><code>action = %(action_mw)s
</code></pre></div></div>
<p>Pour envoyer un mail avec le whois ET les logs, placez la variable sur :</p>
<div class="language-plaintext highlighter-rouge"><div class="highlight"><pre class="highlight"><code>action = %(action_mwl)s
</code></pre></div></div>
<p>Pour activer la surveillance dun service, il suffit de placer la variable “enabled” à “true”</p>
<p>Par défaut la protection du service SSH est activée, pas les autres.</p>
<p>Si votre ssh nécoute pas sur le port 22, pensez à le changer… (port = N° de port).</p>
<p>Rappelez vous également que le loglevel de SSHD (<strong>/etc/ssh/sshd_config</strong>) doit absolument être positionné sur DEBUG (<strong>LogLevel DEBUG</strong>) sans quoi, Fail2ban ne bloquera rien concernant SSH.</p>
<div class="language-plaintext highlighter-rouge"><div class="highlight"><pre class="highlight"><code>#
# JAILS
#
# SSH
[sshd]
enabled = true
port = 55027
logpath = %(sshd_log)s
backend = %(sshd_backend)s
# Mail servers
[postfix]
enabled = true
port = smtp,ssmtp,submission
filter = postfix
logpath = /var/log/mail.log
[sasl]
enabled = true
port = smtp,ssmtp,submission,imap2,imap3,imaps,pop3,pop3s
filter = postfix-sasl
# You might consider monitoring /var/log/mail.warn instead if you are
# running postfix since it would provide the same log lines at the
# "warn" level but overall at the smaller filesize.
logpath = /var/log/mail.log
[dovecot]
enabled = true
port = smtp,ssmtp,submission,imap2,imap3,imaps,pop3,pop3s
filter = dovecot
logpath = /var/log/mail.log
# nginx
[nginx-http-auth]
enabled = true
port = http,https
logpath = %(nginx_error_log)s
</code></pre></div></div>
<p>Redémarrer fail2ban pour implémenter les règles:</p>
<div class="language-plaintext highlighter-rouge"><div class="highlight"><pre class="highlight"><code>systemctl restart fail2ban
</code></pre></div></div>
<p>Afficher les règles de pare-feu actuelles</p>
<div class="language-plaintext highlighter-rouge"><div class="highlight"><pre class="highlight"><code>iptables -S
</code></pre></div></div>
<div class="language-plaintext highlighter-rouge"><div class="highlight"><pre class="highlight"><code>-P INPUT DROP
-P FORWARD DROP
-P OUTPUT ACCEPT
-N f2b-dovecot
-N f2b-nginx-http-auth
-N f2b-postfix
-N f2b-sasl
-N f2b-sshd
-A INPUT -p tcp -m multiport --dports 25,465,587 -j f2b-postfix
-A INPUT -p tcp -m multiport --dports 80,443 -j f2b-nginx-http-auth
-A INPUT -p tcp -m multiport --dports 55027 -j f2b-sshd
-A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
-A INPUT -i lo -j ACCEPT
-A INPUT -p icmp -j ACCEPT
-A INPUT -p tcp -m tcp --dport 55027 -j ACCEPT
-A INPUT -p tcp -m tcp --dport 53 -j ACCEPT
-A INPUT -p udp -m udp --dport 53 -j ACCEPT
-A INPUT -p tcp -m tcp --dport 80 -j ACCEPT
-A INPUT -p tcp -m tcp --dport 443 -j ACCEPT
-A INPUT -p tcp -m tcp --dport 993 -j ACCEPT
-A INPUT -p tcp -m tcp --dport 587 -j ACCEPT
-A INPUT -p tcp -m tcp --dport 25 -j ACCEPT
-A OUTPUT -o lo -j ACCEPT
-A OUTPUT -p tcp -m tcp --dport 55027 -j ACCEPT
-A OUTPUT -p tcp -m tcp --dport 53 -j ACCEPT
-A OUTPUT -p udp -m udp --dport 53 -j ACCEPT
-A OUTPUT -p tcp -m tcp --dport 80 -j ACCEPT
-A OUTPUT -p tcp -m tcp --dport 443 -j ACCEPT
-A OUTPUT -p tcp -m tcp --dport 993 -j ACCEPT
-A OUTPUT -p tcp -m tcp --dport 587 -j ACCEPT
-A OUTPUT -p tcp -m tcp --dport 25 -j ACCEPT
-A f2b-dovecot -j RETURN
-A f2b-nginx-http-auth -j RETURN
-A f2b-postfix -j RETURN
-A f2b-sasl -j RETURN
-A f2b-sshd -j RETURN
</code></pre></div></div>
<h2 id="ufw-avec-fail2ban">UFW avec Fail2ban</h2>
<p>Comme nous le savons, ufw est un très bon choix en raison de sa facilité dutilisation, pour un environnement réseau peu complexe, je lutilise généralement au lieu décrire directement des règles iptables.</p>
<p>Mais fail2ban na pas de configuration jail pour ufw par défaut</p>
<p><strong>Comment utiliser ufw avec fail2ban ?</strong></p>
<p>Avant tout, installons fail2ban sur le dispositif, nous pouvons simplement utiliser le gestionnaire de paquets pour le faire, voici ce que je fais sous Debian</p>
<div class="language-plaintext highlighter-rouge"><div class="highlight"><pre class="highlight"><code>sudo apt install fail2ban
</code></pre></div></div>
<p>Nous devons savoir que fail2ban fonctionne avec deux fichiers de configuration habituellement, les fichiers de configuration jail et filter :</p>
<ul>
<li>configuration jail : définit chaque politique jail.</li>
<li>configuration du filtre : définit le fonctionnement de chaque filtre.</li>
</ul>
<p>Dans la plupart des cas, nous pouvons trouver le fichier de configuration jail par défaut dans <code class="language-plaintext highlighter-rouge">/etc/fail2ban/jail.conf</code>, nous devrions dabord sauvegarder ce fichier, ou simplement créer une autre configuration jail sous <code class="language-plaintext highlighter-rouge">/etc/fail2ban/jail.local</code> et désactiver certaines règles en double de lancienne. Voici ma configuration jail <code class="language-plaintext highlighter-rouge">/etc/fail2ban/jail.local</code> maintenant :</p>
<div class="language-plaintext highlighter-rouge"><div class="highlight"><pre class="highlight"><code>[ufw]
enabled=true
filter=ufw.aggressive
action=iptables-allports
logpath=/var/log/ufw.log
maxretry=1
bantime=-1
[sshd]
enabled=true
filter=sshd
mode=normal
port=22
protocol=tcp
logpath=/var/log/auth.log
maxretry=3
bantime=-1
ignoreip = 127.0.0.0/8 ::1
</code></pre></div></div>
<p>Vous pouvez définir votre propre politique de jail comme vous le souhaitez. Et maintenant, nous avons besoin dune configuration de filtre pour définir comment ufw jail fonctionne exactement, créons un fichier de configuration de filtre <code class="language-plaintext highlighter-rouge">/etc/fail2ban/filter.d/ufw.aggressive.conf</code> et ajoutons ceci :</p>
<div class="language-plaintext highlighter-rouge"><div class="highlight"><pre class="highlight"><code>[Definition]
failregex = [UFW BLOCK].+SRC=&lt;HOST&gt; DST
ignoreregex =
</code></pre></div></div>
<p>Cela signifie quil faut récupérer lIP source qui est rejetée par lufw, afin quelle puisse fonctionner avec la politique que nous avons définie ci-dessus. Enfin, démarrons fail2ban :</p>
<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>systemctl <span class="nb">enable </span>fail2ban
systemctl start fail2ban
systemctl status fail2ban
</code></pre></div></div>
<p>Pour vérifier létat de la prison :</p>
<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>fail2ban-client status ufw
fail2ban-client status sshd
</code></pre></div></div>
<p>Débannir une IP dun jail spécifique :</p>
<div class="language-plaintext highlighter-rouge"><div class="highlight"><pre class="highlight"><code>fail2ban-client set ufw unbanip 192.0.2.2
</code></pre></div></div>
<p>Pour plus dinformations, vous pouvez simplement lire la <a href="https://www.fail2ban.org/wiki/index.php/Main_Page">documentation de fail2ban</a>.</p>
<p class="warning">Après avoir configuré le service fail2ban comme ci-dessus, toute personne essayant de scanner les ports du serveur se verra refuser laccès à tous les ports du serveur à partir du moment où il commence à scanner et est bloqué par ufw pour la première fois, il ne va pas trouver dautres ports ouverts et les ports encore accessibles pour dautres personnes. Mais vous devez faire attention en même temps, si vous avez bloqué les requêtes ICMP dans lufw, fail2ban bloquera toute personne qui essaiera denvoyer un ping à votre serveur.</p>
<p class="warning">Pendant un certain temps dutilisation, je me suis bloqué une fois, et jai dû utiliser un autre réseau pour me connecter au serveur. Je dois dire que cest mon erreur, mais voici une autre chose, parfois jutilise mon serveur comme un proxy, un jour je ne peux pas me connecter à Telegram, et jai découvert que cest parce que fail2ban a interdit une adresse IP Telegram, je nai aucune idée comment cette chose est arrivée. Donc, ces histoires nous ont dit, utilisez cet outil avec précaution, et noubliez pas dajouter les adresses IP auxquelles votre service doit se connecter comme IP à ignorer.</p>
<p class="warning">Lenvironnement du réseau public est très complexe et dangereux, et il existe dinnombrables dispositifs malveillants qui tentent danalyser les adresses IP sur Internet en permanence. Cela signifie que lutilisation de fail2ban sur le réseau public nécessite une lecture fréquente des journaux et une écriture fréquente des règles de pare-feu. Même si un seul exemple ne suffit pas, je dois mentionner que fail2ban a cassé mon service ufw une fois sur mon Raspberry Pi. Si vous utilisez fail2ban dans un environnement réseau complexe et sur un appareil bas de gamme, vous devrez peut-être faire plus attention à létat du service.</p>
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}
outer: for (var i = 0, j = 0; i < qlen; i++) {
var nch = needle.charCodeAt(i);
while (j < tlen) {
if (haystack.charCodeAt(j++) === nch) {
continue outer;
}
}
return false;
}
return true;
}
var _$fuzzysearch_1 = fuzzysearch;
'use strict'
/* removed: const _$fuzzysearch_1 = require('fuzzysearch') */;
var _$FuzzySearchStrategy_5 = new FuzzySearchStrategy()
function FuzzySearchStrategy () {
this.matches = function (string, crit) {
return _$fuzzysearch_1(crit.toLowerCase(), string.toLowerCase())
}
}
'use strict'
var _$LiteralSearchStrategy_6 = new LiteralSearchStrategy()
function LiteralSearchStrategy () {
this.matches = function (str, crit) {
if (!str) return false
str = str.trim().toLowerCase()
crit = crit.trim().toLowerCase()
return crit.split(' ').filter(function (word) {
return str.indexOf(word) >= 0
}).length === crit.split(' ').length
}
}
'use strict'
var _$Repository_4 = {
put: put,
clear: clear,
search: search,
setOptions: __setOptions_4
}
/* removed: const _$FuzzySearchStrategy_5 = require('./SearchStrategies/FuzzySearchStrategy') */;
/* removed: const _$LiteralSearchStrategy_6 = require('./SearchStrategies/LiteralSearchStrategy') */;
function NoSort () {
return 0
}
const data = []
let opt = {}
opt.fuzzy = false
opt.limit = 10
opt.searchStrategy = opt.fuzzy ? _$FuzzySearchStrategy_5 : _$LiteralSearchStrategy_6
opt.sort = NoSort
opt.exclude = []
function put (data) {
if (isObject(data)) {
return addObject(data)
}
if (isArray(data)) {
return addArray(data)
}
return undefined
}
function clear () {
data.length = 0
return data
}
function isObject (obj) {
return Boolean(obj) && Object.prototype.toString.call(obj) === '[object Object]'
}
function isArray (obj) {
return Boolean(obj) && Object.prototype.toString.call(obj) === '[object Array]'
}
function addObject (_data) {
data.push(_data)
return data
}
function addArray (_data) {
const added = []
clear()
for (let i = 0, len = _data.length; i < len; i++) {
if (isObject(_data[i])) {
added.push(addObject(_data[i]))
}
}
return added
}
function search (crit) {
if (!crit) {
return []
}
return findMatches(data, crit, opt.searchStrategy, opt).sort(opt.sort)
}
function __setOptions_4 (_opt) {
opt = _opt || {}
opt.fuzzy = _opt.fuzzy || false
opt.limit = _opt.limit || 10
opt.searchStrategy = _opt.fuzzy ? _$FuzzySearchStrategy_5 : _$LiteralSearchStrategy_6
opt.sort = _opt.sort || NoSort
opt.exclude = _opt.exclude || []
}
function findMatches (data, crit, strategy, opt) {
const matches = []
for (let i = 0; i < data.length && matches.length < opt.limit; i++) {
const match = findMatchesInObject(data[i], crit, strategy, opt)
if (match) {
matches.push(match)
}
}
return matches
}
function findMatchesInObject (obj, crit, strategy, opt) {
for (const key in obj) {
if (!isExcluded(obj[key], opt.exclude) && strategy.matches(obj[key], crit)) {
return obj
}
}
}
function isExcluded (term, excludedTerms) {
for (let i = 0, len = excludedTerms.length; i < len; i++) {
const excludedTerm = excludedTerms[i]
if (new RegExp(excludedTerm).test(term)) {
return true
}
}
return false
}
/* globals ActiveXObject:false */
'use strict'
var _$JSONLoader_2 = {
load: load
}
function load (location, callback) {
const xhr = getXHR()
xhr.open('GET', location, true)
xhr.onreadystatechange = createStateChangeListener(xhr, callback)
xhr.send()
}
function createStateChangeListener (xhr, callback) {
return function () {
if (xhr.readyState === 4 && xhr.status === 200) {
try {
callback(null, JSON.parse(xhr.responseText))
} catch (err) {
callback(err, null)
}
}
}
}
function getXHR () {
return window.XMLHttpRequest ? new window.XMLHttpRequest() : new ActiveXObject('Microsoft.XMLHTTP')
}
'use strict'
var _$OptionsValidator_3 = function OptionsValidator (params) {
if (!validateParams(params)) {
throw new Error('-- OptionsValidator: required options missing')
}
if (!(this instanceof OptionsValidator)) {
return new OptionsValidator(params)
}
const requiredOptions = params.required
this.getRequiredOptions = function () {
return requiredOptions
}
this.validate = function (parameters) {
const errors = []
requiredOptions.forEach(function (requiredOptionName) {
if (typeof parameters[requiredOptionName] === 'undefined') {
errors.push(requiredOptionName)
}
})
return errors
}
function validateParams (params) {
if (!params) {
return false
}
return typeof params.required !== 'undefined' && params.required instanceof Array
}
}
'use strict'
var _$utils_9 = {
merge: merge,
isJSON: isJSON
}
function merge (defaultParams, mergeParams) {
const mergedOptions = {}
for (const option in defaultParams) {
mergedOptions[option] = defaultParams[option]
if (typeof mergeParams[option] !== 'undefined') {
mergedOptions[option] = mergeParams[option]
}
}
return mergedOptions
}
function isJSON (json) {
try {
if (json instanceof Object && JSON.parse(JSON.stringify(json))) {
return true
}
return false
} catch (err) {
return false
}
}
var _$src_8 = {};
(function (window) {
'use strict'
let options = {
searchInput: null,
resultsContainer: null,
json: [],
success: Function.prototype,
searchResultTemplate: '<li><a href="{url}" title="{desc}">{title}</a></li>',
templateMiddleware: Function.prototype,
sortMiddleware: function () {
return 0
},
noResultsText: 'No results found',
limit: 10,
fuzzy: false,
debounceTime: null,
exclude: []
}
let debounceTimerHandle
const debounce = function (func, delayMillis) {
if (delayMillis) {
clearTimeout(debounceTimerHandle)
debounceTimerHandle = setTimeout(func, delayMillis)
} else {
func.call()
}
}
const requiredOptions = ['searchInput', 'resultsContainer', 'json']
/* removed: const _$Templater_7 = require('./Templater') */;
/* removed: const _$Repository_4 = require('./Repository') */;
/* removed: const _$JSONLoader_2 = require('./JSONLoader') */;
const optionsValidator = _$OptionsValidator_3({
required: requiredOptions
})
/* removed: const _$utils_9 = require('./utils') */;
window.SimpleJekyllSearch = function (_options) {
const errors = optionsValidator.validate(_options)
if (errors.length > 0) {
throwError('You must specify the following required options: ' + requiredOptions)
}
options = _$utils_9.merge(options, _options)
_$Templater_7.setOptions({
template: options.searchResultTemplate,
middleware: options.templateMiddleware
})
_$Repository_4.setOptions({
fuzzy: options.fuzzy,
limit: options.limit,
sort: options.sortMiddleware,
exclude: options.exclude
})
if (_$utils_9.isJSON(options.json)) {
initWithJSON(options.json)
} else {
initWithURL(options.json)
}
const rv = {
search: search
}
typeof options.success === 'function' && options.success.call(rv)
return rv
}
function initWithJSON (json) {
_$Repository_4.put(json)
registerInput()
}
function initWithURL (url) {
_$JSONLoader_2.load(url, function (err, json) {
if (err) {
throwError('failed to get JSON (' + url + ')')
}
initWithJSON(json)
})
}
function emptyResultsContainer () {
options.resultsContainer.innerHTML = ''
}
function appendToResultsContainer (text) {
options.resultsContainer.innerHTML += text
}
function registerInput () {
options.searchInput.addEventListener('input', function (e) {
if (isWhitelistedKey(e.which)) {
emptyResultsContainer()
debounce(function () { search(e.target.value) }, options.debounceTime)
}
})
}
function search (query) {
if (isValidQuery(query)) {
emptyResultsContainer()
render(_$Repository_4.search(query), query)
}
}
function render (results, query) {
const len = results.length
if (len === 0) {
return appendToResultsContainer(options.noResultsText)
}
for (let i = 0; i < len; i++) {
results[i].query = query
appendToResultsContainer(_$Templater_7.compile(results[i]))
}
}
function isValidQuery (query) {
return query && query.length > 0
}
function isWhitelistedKey (key) {
return [13, 16, 20, 37, 38, 39, 40, 91].indexOf(key) === -1
}
function throwError (message) {
throw new Error('SimpleJekyllSearch --- ' + message)
}
})(window)
}());
</script>
<!-- Configuration -->
<script>
SimpleJekyllSearch({
searchInput: document.getElementById('search-input'),
resultsContainer: document.getElementById('results-container'),
noResultsText: '<p>Aucun résultat!</p>',
json: '/search.json',
searchResultTemplate: '<li><a href="{url}">{date}&nbsp;{title}</a>&nbsp;(Création {create})</li>'
})
</script>
</div></div>
<script>(function() {
var SOURCES = window.TEXT_VARIABLES.sources;
window.Lazyload.js(SOURCES.jquery, function() {
function scrollToAnchor(anchor, duration, callback) {
var $root = this;
$root.animate({ scrollTop: $(anchor).position().top }, duration, function() {
window.history.replaceState(null, '', window.location.href.split('#')[0] + anchor);
callback && callback();
});
}
$.fn.scrollToAnchor = scrollToAnchor;
});
})();
(function() {
var SOURCES = window.TEXT_VARIABLES.sources;
window.Lazyload.js(SOURCES.jquery, function() {
function affix(options) {
var $root = this, $window = $(window), $scrollTarget, $scroll,
offsetBottom = 0, scrollTarget = window, scroll = window.document, disabled = false, isOverallScroller = true,
rootTop, rootLeft, rootHeight, scrollBottom, rootBottomTop,
hasInit = false, curState;
function setOptions(options) {
var _options = options || {};
_options.offsetBottom && (offsetBottom = _options.offsetBottom);
_options.scrollTarget && (scrollTarget = _options.scrollTarget);
_options.scroll && (scroll = _options.scroll);
_options.disabled !== undefined && (disabled = _options.disabled);
$scrollTarget = $(scrollTarget);
isOverallScroller = window.isOverallScroller($scrollTarget[0]);
$scroll = $(scroll);
}
function preCalc() {
top();
rootHeight = $root.outerHeight();
rootTop = $root.offset().top + (isOverallScroller ? 0 : $scrollTarget.scrollTop());
rootLeft = $root.offset().left;
}
function calc(needPreCalc) {
needPreCalc && preCalc();
scrollBottom = $scroll.outerHeight() - offsetBottom - rootHeight;
rootBottomTop = scrollBottom - rootTop;
}
function top() {
if (curState !== 'top') {
$root.removeClass('fixed').css({
left: 0,
top: 0
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curState = 'top';
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function fixed() {
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$root.addClass('fixed').css({
left: rootLeft + 'px',
top: 0
});
curState = 'fixed';
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}
function bottom() {
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left: 0,
top: rootBottomTop + 'px'
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curState = 'bottom';
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var interval, timeout;
calc(true); setState();
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calc();
}, 100);
timeout = setTimeout(function() {
clearInterval(interval);
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window.pageLoad.then(function() {
setTimeout(function() {
clearInterval(interval);
clearTimeout(timeout);
}, 3000);
});
$scrollTarget.on('scroll', function() {
disabled || setState();
});
$window.on('resize', function() {
disabled || (calc(true), setState());
});
hasInit = true;
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setOptions(options);
if (!disabled) {
init();
}
$window.on('resize', window.throttle(function() {
init();
}, 200));
return {
setOptions: setOptions,
refresh: function() {
calc(true, { animation: false }); setState();
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};
}
$.fn.affix = affix;
});
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var SOURCES = window.TEXT_VARIABLES.sources;
window.Lazyload.js(SOURCES.jquery, function() {
function toc(options) {
var $root = this, $window = $(window), $scrollTarget, $scroller, $tocUl = $('<ul class="toc toc--ellipsis"></ul>'), $tocLi, $headings, $activeLast, $activeCur,
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headingsPos, scrolling = false, hasRendered = false, hasInit = false;
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var _options = options || {};
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_options.container && (container = _options.container);
_options.scrollTarget && (scrollTarget = _options.scrollTarget);
_options.scroller && (scroller = _options.scroller);
_options.disabled !== undefined && (disabled = _options.disabled);
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$scrollTarget = $(scrollTarget);
$scroller = $(scroller);
}
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headingsPos = [];
$headings.each(function() {
headingsPos.push(Math.floor($(this).position().top));
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var scrollTop = $scrollTarget.scrollTop(), i;
if (disabled || !headingsPos || headingsPos.length < 1) { return; }
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if (scrollTop >= headingsPos[i]) {
$activeCur = $tocLi.eq(i);
} else {
$activeCur || ($activeCur = $tocLi.eq(i));
break;
}
}
}
$activeLast && $activeLast.removeClass('active');
($activeLast = $activeCur).addClass('active');
}
function render() {
if(!hasRendered) {
$root.append($tocUl);
$headings.each(function() {
var $this = $(this);
$tocUl.append($('<li></li>').addClass('toc-' + $this.prop('tagName').toLowerCase())
.append($('<a></a>').text($this.text()).attr('href', '#' + $this.prop('id'))));
});
$tocLi = $tocUl.children('li');
$tocUl.on('click', 'a', function(e) {
e.preventDefault();
var $this = $(this);
scrolling = true;
setState($this.parent());
$scroller.scrollToAnchor($this.attr('href'), 400, function() {
scrolling = false;
});
});
}
hasRendered = true;
}
function init() {
var interval, timeout;
if(!hasInit) {
render(); calc(); setState(null, scrolling);
// run calc every 100 millisecond
interval = setInterval(function() {
calc();
}, 100);
timeout = setTimeout(function() {
clearInterval(interval);
}, 45000);
window.pageLoad.then(function() {
setTimeout(function() {
clearInterval(interval);
clearTimeout(timeout);
}, 3000);
});
$scrollTarget.on('scroll', function() {
disabled || setState(null, scrolling);
});
$window.on('resize', window.throttle(function() {
if (!disabled) {
render(); calc(); setState(null, scrolling);
}
}, 100));
}
hasInit = true;
}
setOptions(options);
if (!disabled) {
init();
}
$window.on('resize', window.throttle(function() {
init();
}, 200));
return {
setOptions: setOptions
};
}
$.fn.toc = toc;
});
})();
/*(function () {
})();*/
</script><script>
/* toc must before affix, since affix need to konw toc' height. */(function() {
var SOURCES = window.TEXT_VARIABLES.sources;
var TOC_SELECTOR = window.TEXT_VARIABLES.site.toc.selectors;
window.Lazyload.js(SOURCES.jquery, function() {
var $window = $(window);
var $articleContent = $('.js-article-content');
var $tocRoot = $('.js-toc-root'), $col2 = $('.js-col-aside');
var toc;
var tocDisabled = false;
var hasSidebar = $('.js-page-root').hasClass('layout--page--sidebar');
var hasToc = $articleContent.find(TOC_SELECTOR).length > 0;
function disabled() {
return $col2.css('display') === 'none' || !hasToc;
}
tocDisabled = disabled();
toc = $tocRoot.toc({
selectors: TOC_SELECTOR,
container: $articleContent,
scrollTarget: hasSidebar ? '.js-page-main' : null,
scroller: hasSidebar ? '.js-page-main' : null,
disabled: tocDisabled
});
$window.on('resize', window.throttle(function() {
tocDisabled = disabled();
toc && toc.setOptions({
disabled: tocDisabled
});
}, 100));
});
})();
(function() {
var SOURCES = window.TEXT_VARIABLES.sources;
window.Lazyload.js(SOURCES.jquery, function() {
var $window = $(window), $pageFooter = $('.js-page-footer');
var $pageAside = $('.js-page-aside');
var affix;
var tocDisabled = false;
var hasSidebar = $('.js-page-root').hasClass('layout--page--sidebar');
affix = $pageAside.affix({
offsetBottom: $pageFooter.outerHeight(),
scrollTarget: hasSidebar ? '.js-page-main' : null,
scroller: hasSidebar ? '.js-page-main' : null,
scroll: hasSidebar ? $('.js-page-main').children() : null,
disabled: tocDisabled
});
$window.on('resize', window.throttle(function() {
affix && affix.setOptions({
disabled: tocDisabled
});
}, 100));
window.pageAsideAffix = affix;
});
})();
</script><!---->
</div>
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