diff --git a/app.js b/app.js
index f0ccd7d48..bfa7d356e 100644
--- a/app.js
+++ b/app.js
@@ -29,7 +29,6 @@ var getImageMimeType = require('./lib/utils.js').getImageMimeType
 // core
 var config = require('./lib/config.js')
 var logger = require('./lib/logger.js')
-var auth = require('./lib/auth.js')
 var response = require('./lib/response.js')
 var models = require('./lib/models')
 
@@ -165,7 +164,6 @@ app.use(flash())
 // passport
 app.use(passport.initialize())
 app.use(passport.session())
-auth.registerAuthMethod()
 
 // serialize and deserialize
 passport.serializeUser(function (user, done) {
@@ -200,164 +198,10 @@ app.engine('ejs', ejs.renderFile)
 // set view engine
 app.set('view engine', 'ejs')
 
-function setReturnToFromReferer (req) {
-  var referer = req.get('referer')
-  if (!req.session) req.session = {}
-  req.session.returnTo = referer
-}
-
-// facebook auth
-if (config.facebook) {
-  app.get('/auth/facebook', function (req, res, next) {
-    setReturnToFromReferer(req)
-    passport.authenticate('facebook')(req, res, next)
-  })
-  // facebook auth callback
-  app.get('/auth/facebook/callback',
-        passport.authenticate('facebook', {
-          successReturnToOrRedirect: config.serverurl + '/',
-          failureRedirect: config.serverurl + '/'
-        }))
-}
-// twitter auth
-if (config.twitter) {
-  app.get('/auth/twitter', function (req, res, next) {
-    setReturnToFromReferer(req)
-    passport.authenticate('twitter')(req, res, next)
-  })
-  // twitter auth callback
-  app.get('/auth/twitter/callback',
-        passport.authenticate('twitter', {
-          successReturnToOrRedirect: config.serverurl + '/',
-          failureRedirect: config.serverurl + '/'
-        }))
-}
-// github auth
-if (config.github) {
-  app.get('/auth/github', function (req, res, next) {
-    setReturnToFromReferer(req)
-    passport.authenticate('github')(req, res, next)
-  })
-  // github auth callback
-  app.get('/auth/github/callback',
-        passport.authenticate('github', {
-          successReturnToOrRedirect: config.serverurl + '/',
-          failureRedirect: config.serverurl + '/'
-        }))
-  if (!config.gitlab.scope || config.gitlab.scope === 'api') {
-    // gitlab callback actions
-    app.get('/auth/gitlab/callback/:noteId/:action', response.gitlabActions)
-  }
-}
-// gitlab auth
-if (config.gitlab) {
-  app.get('/auth/gitlab', function (req, res, next) {
-    setReturnToFromReferer(req)
-    passport.authenticate('gitlab')(req, res, next)
-  })
-  // gitlab auth callback
-  app.get('/auth/gitlab/callback',
-        passport.authenticate('gitlab', {
-          successReturnToOrRedirect: config.serverurl + '/',
-          failureRedirect: config.serverurl + '/'
-        }))
-  // gitlab callback actions
-  app.get('/auth/gitlab/callback/:noteId/:action', response.gitlabActions)
-}
-// dropbox auth
-if (config.dropbox) {
-  app.get('/auth/dropbox', function (req, res, next) {
-    setReturnToFromReferer(req)
-    passport.authenticate('dropbox-oauth2')(req, res, next)
-  })
-  // dropbox auth callback
-  app.get('/auth/dropbox/callback',
-        passport.authenticate('dropbox-oauth2', {
-          successReturnToOrRedirect: config.serverurl + '/',
-          failureRedirect: config.serverurl + '/'
-        }))
-}
-// google auth
-if (config.google) {
-  app.get('/auth/google', function (req, res, next) {
-    setReturnToFromReferer(req)
-    passport.authenticate('google', { scope: ['profile'] })(req, res, next)
-  })
-  // google auth callback
-  app.get('/auth/google/callback',
-        passport.authenticate('google', {
-          successReturnToOrRedirect: config.serverurl + '/',
-          failureRedirect: config.serverurl + '/'
-        }))
-}
-// ldap auth
-if (config.ldap) {
-  app.post('/auth/ldap', urlencodedParser, function (req, res, next) {
-    if (!req.body.username || !req.body.password) return response.errorBadRequest(res)
-    setReturnToFromReferer(req)
-    passport.authenticate('ldapauth', {
-      successReturnToOrRedirect: config.serverurl + '/',
-      failureRedirect: config.serverurl + '/',
-      failureFlash: true
-    })(req, res, next)
-  })
-}
-// email auth
-if (config.email) {
-  if (config.allowemailregister) {
-    app.post('/register', urlencodedParser, function (req, res, next) {
-      if (!req.body.email || !req.body.password) return response.errorBadRequest(res)
-      if (!validator.isEmail(req.body.email)) return response.errorBadRequest(res)
-      models.User.findOrCreate({
-        where: {
-          email: req.body.email
-        },
-        defaults: {
-          password: req.body.password
-        }
-      }).spread(function (user, created) {
-        if (user) {
-          if (created) {
-            if (config.debug) {
-              logger.info('user registered: ' + user.id)
-            }
-            req.flash('info', "You've successfully registered, please signin.")
-          } else {
-            if (config.debug) {
-              logger.info('user found: ' + user.id)
-            }
-            req.flash('error', 'This email has been used, please try another one.')
-          }
-          return res.redirect(config.serverurl + '/')
-        }
-        req.flash('error', 'Failed to register your account, please try again.')
-        return res.redirect(config.serverurl + '/')
-      }).catch(function (err) {
-        logger.error('auth callback failed: ' + err)
-        return response.errorInternalError(res)
-      })
-    })
-  }
 app.use(require('./lib/web/baseRouter'))
 app.use(require('./lib/web/statusRouter'))
+app.use(require('./lib/web/auth'))
 
-  app.post('/login', urlencodedParser, function (req, res, next) {
-    if (!req.body.email || !req.body.password) return response.errorBadRequest(res)
-    if (!validator.isEmail(req.body.email)) return response.errorBadRequest(res)
-    setReturnToFromReferer(req)
-    passport.authenticate('local', {
-      successReturnToOrRedirect: config.serverurl + '/',
-      failureRedirect: config.serverurl + '/',
-      failureFlash: 'Invalid email or password.'
-    })(req, res, next)
-  })
-}
-// logout
-app.get('/logout', function (req, res) {
-  if (config.debug && req.isAuthenticated()) { logger.info('user logout: ' + req.user.id) }
-  req.logout()
-  res.redirect(config.serverurl + '/')
-})
 var history = require('./lib/history.js')
 // get history
 app.get('/history', history.historyGet)
diff --git a/lib/auth.js b/lib/auth.js
deleted file mode 100644
index 3e129b957..000000000
--- a/lib/auth.js
+++ /dev/null
@@ -1,194 +0,0 @@
-'use strict'
-// auth
-// external modules
-var passport = require('passport')
-var FacebookStrategy = require('passport-facebook').Strategy
-var TwitterStrategy = require('passport-twitter').Strategy
-var GithubStrategy = require('passport-github').Strategy
-var GitlabStrategy = require('passport-gitlab2').Strategy
-var DropboxStrategy = require('passport-dropbox-oauth2').Strategy
-var GoogleStrategy = require('passport-google-oauth20').Strategy
-var LdapStrategy = require('passport-ldapauth')
-var LocalStrategy = require('passport-local').Strategy
-var validator = require('validator')
-
-// core
-var config = require('./config.js')
-var logger = require('./logger.js')
-var models = require('./models')
-
-function callback (accessToken, refreshToken, profile, done) {
-  // logger.info(profile.displayName || profile.username);
-  var stringifiedProfile = JSON.stringify(profile)
-  models.User.findOrCreate({
-    where: {
-      profileid: profile.id.toString()
-    },
-    defaults: {
-      profile: stringifiedProfile,
-      accessToken: accessToken,
-      refreshToken: refreshToken
-    }
-  }).spread(function (user, created) {
-    if (user) {
-      var needSave = false
-      if (user.profile !== stringifiedProfile) {
-        user.profile = stringifiedProfile
-        needSave = true
-      }
-      if (user.accessToken !== accessToken) {
-        user.accessToken = accessToken
-        needSave = true
-      }
-      if (user.refreshToken !== refreshToken) {
-        user.refreshToken = refreshToken
-        needSave = true
-      }
-      if (needSave) {
-        user.save().then(function () {
-          if (config.debug) { logger.info('user login: ' + user.id) }
-          return done(null, user)
-        })
-      } else {
-        if (config.debug) { logger.info('user login: ' + user.id) }
-        return done(null, user)
-      }
-    }
-  }).catch(function (err) {
-    logger.error('auth callback failed: ' + err)
-    return done(err, null)
-  })
-}
-
-function registerAuthMethod () {
-// facebook
-  if (config.facebook) {
-    passport.use(new FacebookStrategy({
-      clientID: config.facebook.clientID,
-      clientSecret: config.facebook.clientSecret,
-      callbackURL: config.serverurl + '/auth/facebook/callback'
-    }, callback))
-  }
-// twitter
-  if (config.twitter) {
-    passport.use(new TwitterStrategy({
-      consumerKey: config.twitter.consumerKey,
-      consumerSecret: config.twitter.consumerSecret,
-      callbackURL: config.serverurl + '/auth/twitter/callback'
-    }, callback))
-  }
-// github
-  if (config.github) {
-    passport.use(new GithubStrategy({
-      clientID: config.github.clientID,
-      clientSecret: config.github.clientSecret,
-      callbackURL: config.serverurl + '/auth/github/callback'
-    }, callback))
-  }
-// gitlab
-  if (config.gitlab) {
-    passport.use(new GitlabStrategy({
-      baseURL: config.gitlab.baseURL,
-      clientID: config.gitlab.clientID,
-      clientSecret: config.gitlab.clientSecret,
-      scope: config.gitlab.scope,
-      callbackURL: config.serverurl + '/auth/gitlab/callback'
-    }, callback))
-  }
-// dropbox
-  if (config.dropbox) {
-    passport.use(new DropboxStrategy({
-      apiVersion: '2',
-      clientID: config.dropbox.clientID,
-      clientSecret: config.dropbox.clientSecret,
-      callbackURL: config.serverurl + '/auth/dropbox/callback'
-    }, callback))
-  }
-// google
-  if (config.google) {
-    passport.use(new GoogleStrategy({
-      clientID: config.google.clientID,
-      clientSecret: config.google.clientSecret,
-      callbackURL: config.serverurl + '/auth/google/callback'
-    }, callback))
-  }
-// ldap
-  if (config.ldap) {
-    passport.use(new LdapStrategy({
-      server: {
-        url: config.ldap.url || null,
-        bindDn: config.ldap.bindDn || null,
-        bindCredentials: config.ldap.bindCredentials || null,
-        searchBase: config.ldap.searchBase || null,
-        searchFilter: config.ldap.searchFilter || null,
-        searchAttributes: config.ldap.searchAttributes || null,
-        tlsOptions: config.ldap.tlsOptions || null
-      }
-    },
-    function (user, done) {
-      var profile = {
-        id: 'LDAP-' + user.uidNumber,
-        username: user.uid,
-        displayName: user.displayName,
-        emails: user.mail ? [user.mail] : [],
-        avatarUrl: null,
-        profileUrl: null,
-        provider: 'ldap'
-      }
-      var stringifiedProfile = JSON.stringify(profile)
-      models.User.findOrCreate({
-        where: {
-          profileid: profile.id.toString()
-        },
-        defaults: {
-          profile: stringifiedProfile
-        }
-      }).spread(function (user, created) {
-        if (user) {
-          var needSave = false
-          if (user.profile !== stringifiedProfile) {
-            user.profile = stringifiedProfile
-            needSave = true
-          }
-          if (needSave) {
-            user.save().then(function () {
-              if (config.debug) { logger.info('user login: ' + user.id) }
-              return done(null, user)
-            })
-          } else {
-            if (config.debug) { logger.info('user login: ' + user.id) }
-            return done(null, user)
-          }
-        }
-      }).catch(function (err) {
-        logger.error('ldap auth failed: ' + err)
-        return done(err, null)
-      })
-    }))
-  }
-// email
-  if (config.email) {
-    passport.use(new LocalStrategy({
-      usernameField: 'email'
-    },
-    function (email, password, done) {
-      if (!validator.isEmail(email)) return done(null, false)
-      models.User.findOne({
-        where: {
-          email: email
-        }
-      }).then(function (user) {
-        if (!user) return done(null, false)
-        if (!user.verifyPassword(password)) return done(null, false)
-        return done(null, user)
-      }).catch(function (err) {
-        logger.error(err)
-        return done(err)
-      })
-    }))
-  }
-}
-
-module.exports = {
-  registerAuthMethod: registerAuthMethod
-}
diff --git a/lib/web/auth/dropbox/index.js b/lib/web/auth/dropbox/index.js
new file mode 100644
index 000000000..c03fbc57d
--- /dev/null
+++ b/lib/web/auth/dropbox/index.js
@@ -0,0 +1,29 @@
+'use strict'
+
+const Router = require('express').Router
+const passport = require('passport')
+const DropboxStrategy = require('passport-dropbox-oauth2').Strategy
+const config = require('../../../config')
+const {setReturnToFromReferer, passportGeneralCallback} = require('../utils')
+
+let dropboxAuth = module.exports = Router()
+
+passport.use(new DropboxStrategy({
+  apiVersion: '2',
+  clientID: config.dropbox.clientID,
+  clientSecret: config.dropbox.clientSecret,
+  callbackURL: config.serverurl + '/auth/dropbox/callback'
+}, passportGeneralCallback))
+
+dropboxAuth.get('/auth/dropbox', function (req, res, next) {
+  setReturnToFromReferer(req)
+  passport.authenticate('dropbox-oauth2')(req, res, next)
+})
+
+// dropbox auth callback
+dropboxAuth.get('/auth/dropbox/callback',
+  passport.authenticate('dropbox-oauth2', {
+    successReturnToOrRedirect: config.serverurl + '/',
+    failureRedirect: config.serverurl + '/'
+  })
+)
diff --git a/lib/web/auth/email/index.js b/lib/web/auth/email/index.js
new file mode 100644
index 000000000..760075f85
--- /dev/null
+++ b/lib/web/auth/email/index.js
@@ -0,0 +1,74 @@
+'use strict'
+
+const Router = require('express').Router
+const passport = require('passport')
+const validator = require('validator')
+const LocalStrategy = require('passport-local').Strategy
+const config = require('../../../config')
+const models = require('../../../models')
+const logger = require('../../../logger')
+const {setReturnToFromReferer} = require('../utils')
+const {urlencodedParser} = require('../../utils')
+const response = require('../../../response')
+
+let emailAuth = module.exports = Router()
+
+passport.use(new LocalStrategy({
+  usernameField: 'email'
+}, function (email, password, done) {
+  if (!validator.isEmail(email)) return done(null, false)
+  models.User.findOne({
+    where: {
+      email: email
+    }
+  }).then(function (user) {
+    if (!user) return done(null, false)
+    if (!user.verifyPassword(password)) return done(null, false)
+    return done(null, user)
+  }).catch(function (err) {
+    logger.error(err)
+    return done(err)
+  })
+}))
+
+if (config.allowemailregister) {
+  emailAuth.post('/register', urlencodedParser, function (req, res, next) {
+    if (!req.body.email || !req.body.password) return response.errorBadRequest(res)
+    if (!validator.isEmail(req.body.email)) return response.errorBadRequest(res)
+    models.User.findOrCreate({
+      where: {
+        email: req.body.email
+      },
+      defaults: {
+        password: req.body.password
+      }
+    }).spread(function (user, created) {
+      if (user) {
+        if (created) {
+          logger.debug('user registered: ' + user.id)
+          req.flash('info', "You've successfully registered, please signin.")
+        } else {
+          logger.debug('user found: ' + user.id)
+          req.flash('error', 'This email has been used, please try another one.')
+        }
+        return res.redirect(config.serverurl + '/')
+      }
+      req.flash('error', 'Failed to register your account, please try again.')
+      return res.redirect(config.serverurl + '/')
+    }).catch(function (err) {
+      logger.error('auth callback failed: ' + err)
+      return response.errorInternalError(res)
+    })
+  })
+}
+
+emailAuth.post('/login', urlencodedParser, function (req, res, next) {
+  if (!req.body.email || !req.body.password) return response.errorBadRequest(res)
+  if (!validator.isEmail(req.body.email)) return response.errorBadRequest(res)
+  setReturnToFromReferer(req)
+  passport.authenticate('local', {
+    successReturnToOrRedirect: config.serverurl + '/',
+    failureRedirect: config.serverurl + '/',
+    failureFlash: 'Invalid email or password.'
+  })(req, res, next)
+})
diff --git a/lib/web/auth/facebook/index.js b/lib/web/auth/facebook/index.js
new file mode 100644
index 000000000..0e5474d8c
--- /dev/null
+++ b/lib/web/auth/facebook/index.js
@@ -0,0 +1,29 @@
+'use strict'
+
+const Router = require('express').Router
+const passport = require('passport')
+const FacebookStrategy = require('passport-facebook').Strategy
+
+const config = require('../../../config')
+const {setReturnToFromReferer, passportGeneralCallback} = require('../utils')
+
+let facebookAuth = module.exports = Router()
+
+passport.use(new FacebookStrategy({
+  clientID: config.facebook.clientID,
+  clientSecret: config.facebook.clientSecret,
+  callbackURL: config.serverurl + '/auth/facebook/callback'
+}, passportGeneralCallback))
+
+facebookAuth.get('/auth/facebook', function (req, res, next) {
+  setReturnToFromReferer(req)
+  passport.authenticate('facebook')(req, res, next)
+})
+
+// facebook auth callback
+facebookAuth.get('/auth/facebook/callback',
+  passport.authenticate('facebook', {
+    successReturnToOrRedirect: config.serverurl + '/',
+    failureRedirect: config.serverurl + '/'
+  })
+)
diff --git a/lib/web/auth/github/index.js b/lib/web/auth/github/index.js
new file mode 100644
index 000000000..2a26669cd
--- /dev/null
+++ b/lib/web/auth/github/index.js
@@ -0,0 +1,28 @@
+'use strict'
+
+const Router = require('express').Router
+const passport = require('passport')
+const GithubStrategy = require('passport-github').Strategy
+const config = require('../../../config')
+const {setReturnToFromReferer, passportGeneralCallback} = require('../utils')
+
+let githubAuth = module.exports = Router()
+
+passport.use(new GithubStrategy({
+  clientID: config.github.clientID,
+  clientSecret: config.github.clientSecret,
+  callbackURL: config.serverurl + '/auth/github/callback'
+}, passportGeneralCallback))
+
+githubAuth.get('/auth/github', function (req, res, next) {
+  setReturnToFromReferer(req)
+  passport.authenticate('github')(req, res, next)
+})
+
+// github auth callback
+githubAuth.get('/auth/github/callback',
+  passport.authenticate('github', {
+    successReturnToOrRedirect: config.serverurl + '/',
+    failureRedirect: config.serverurl + '/'
+  })
+)
diff --git a/lib/web/auth/gitlab/index.js b/lib/web/auth/gitlab/index.js
new file mode 100644
index 000000000..51de1602e
--- /dev/null
+++ b/lib/web/auth/gitlab/index.js
@@ -0,0 +1,36 @@
+'use strict'
+
+const Router = require('express').Router
+const passport = require('passport')
+const GitlabStrategy = require('passport-gitlab2').Strategy
+const config = require('../../../config')
+const response = require('../../../response')
+const {setReturnToFromReferer, passportGeneralCallback} = require('../utils')
+
+let gitlabAuth = module.exports = Router()
+
+passport.use(new GitlabStrategy({
+  baseURL: config.gitlab.baseURL,
+  clientID: config.gitlab.clientID,
+  clientSecret: config.gitlab.clientSecret,
+  scope: config.gitlab.scope,
+  callbackURL: config.serverurl + '/auth/gitlab/callback'
+}, passportGeneralCallback))
+
+gitlabAuth.get('/auth/gitlab', function (req, res, next) {
+  setReturnToFromReferer(req)
+  passport.authenticate('gitlab')(req, res, next)
+})
+
+// gitlab auth callback
+gitlabAuth.get('/auth/gitlab/callback',
+  passport.authenticate('gitlab', {
+    successReturnToOrRedirect: config.serverurl + '/',
+    failureRedirect: config.serverurl + '/'
+  })
+)
+
+if (!config.gitlab.scope || config.gitlab.scope === 'api') {
+  // gitlab callback actions
+  gitlabAuth.get('/auth/gitlab/callback/:noteId/:action', response.gitlabActions)
+}
diff --git a/lib/web/auth/google/index.js b/lib/web/auth/google/index.js
new file mode 100644
index 000000000..bf2a260f7
--- /dev/null
+++ b/lib/web/auth/google/index.js
@@ -0,0 +1,27 @@
+'use strict'
+
+const Router = require('express').Router
+const passport = require('passport')
+var GoogleStrategy = require('passport-google-oauth20').Strategy
+const config = require('../../../config')
+const {setReturnToFromReferer, passportGeneralCallback} = require('../utils')
+
+let facebookAuth = module.exports = Router()
+
+passport.use(new GoogleStrategy({
+  clientID: config.google.clientID,
+  clientSecret: config.google.clientSecret,
+  callbackURL: config.serverurl + '/auth/google/callback'
+}, passportGeneralCallback))
+
+facebookAuth.get('/auth/google', function (req, res, next) {
+  setReturnToFromReferer(req)
+  passport.authenticate('google', { scope: ['profile'] })(req, res, next)
+})
+  // google auth callback
+facebookAuth.get('/auth/google/callback',
+  passport.authenticate('google', {
+    successReturnToOrRedirect: config.serverurl + '/',
+    failureRedirect: config.serverurl + '/'
+  })
+)
diff --git a/lib/web/auth/index.js b/lib/web/auth/index.js
new file mode 100644
index 000000000..3a2038000
--- /dev/null
+++ b/lib/web/auth/index.js
@@ -0,0 +1,26 @@
+'use strict'
+
+const Router = require('express').Router
+
+const config = require('../../config')
+const logger = require('../../logger')
+
+const authRouter = module.exports = Router()
+
+if (config.facebook) authRouter.use('/', require('./facebook'))
+if (config.twitter) authRouter.use('/', require('./twitter'))
+if (config.github) authRouter.use('/', require('./github'))
+if (config.gitlab) authRouter.use('/', require('./gitlab'))
+if (config.dropbox) authRouter.use('/', require('./dropbox'))
+if (config.google) authRouter.use('/', require('./google'))
+if (config.ldap) authRouter.use('/', require('./ldap'))
+if (config.email) authRouter.use('/', require('./email'))
+
+// logout
+authRouter.get('/logout', function (req, res) {
+  if (config.debug && req.isAuthenticated()) {
+    logger.debug('user logout: ' + req.user.id)
+  }
+  req.logout()
+  res.redirect(config.serverurl + '/')
+})
diff --git a/lib/web/auth/ldap/index.js b/lib/web/auth/ldap/index.js
new file mode 100644
index 000000000..766c5cbcc
--- /dev/null
+++ b/lib/web/auth/ldap/index.js
@@ -0,0 +1,74 @@
+'use strict'
+
+const Router = require('express').Router
+const passport = require('passport')
+const LDAPStrategy = require('passport-ldapauth')
+const config = require('../../../config')
+const models = require('../../../models')
+const logger = require('../../../logger')
+const {setReturnToFromReferer} = require('../utils')
+const {urlencodedParser} = require('../../utils')
+const response = require('../../../response')
+
+let ldapAuth = module.exports = Router()
+
+passport.use(new LDAPStrategy({
+  server: {
+    url: config.ldap.url || null,
+    bindDn: config.ldap.bindDn || null,
+    bindCredentials: config.ldap.bindCredentials || null,
+    searchBase: config.ldap.searchBase || null,
+    searchFilter: config.ldap.searchFilter || null,
+    searchAttributes: config.ldap.searchAttributes || null,
+    tlsOptions: config.ldap.tlsOptions || null
+  }
+}, function (user, done) {
+  var profile = {
+    id: 'LDAP-' + user.uidNumber,
+    username: user.uid,
+    displayName: user.displayName,
+    emails: user.mail ? [user.mail] : [],
+    avatarUrl: null,
+    profileUrl: null,
+    provider: 'ldap'
+  }
+  var stringifiedProfile = JSON.stringify(profile)
+  models.User.findOrCreate({
+    where: {
+      profileid: profile.id.toString()
+    },
+    defaults: {
+      profile: stringifiedProfile
+    }
+  }).spread(function (user, created) {
+    if (user) {
+      var needSave = false
+      if (user.profile !== stringifiedProfile) {
+        user.profile = stringifiedProfile
+        needSave = true
+      }
+      if (needSave) {
+        user.save().then(function () {
+          if (config.debug) { logger.debug('user login: ' + user.id) }
+          return done(null, user)
+        })
+      } else {
+        if (config.debug) { logger.debug('user login: ' + user.id) }
+        return done(null, user)
+      }
+    }
+  }).catch(function (err) {
+    logger.error('ldap auth failed: ' + err)
+    return done(err, null)
+  })
+}))
+
+ldapAuth.post('/auth/ldap', urlencodedParser, function (req, res, next) {
+  if (!req.body.username || !req.body.password) return response.errorBadRequest(res)
+  setReturnToFromReferer(req)
+  passport.authenticate('ldapauth', {
+    successReturnToOrRedirect: config.serverurl + '/',
+    failureRedirect: config.serverurl + '/',
+    failureFlash: true
+  })(req, res, next)
+})
diff --git a/lib/web/auth/twitter/index.js b/lib/web/auth/twitter/index.js
new file mode 100644
index 000000000..5429522de
--- /dev/null
+++ b/lib/web/auth/twitter/index.js
@@ -0,0 +1,29 @@
+'use strict'
+
+const Router = require('express').Router
+const passport = require('passport')
+const TwitterStrategy = require('passport-twitter').Strategy
+
+const config = require('../../../config')
+const {setReturnToFromReferer, passportGeneralCallback} = require('../utils')
+
+let twitterAuth = module.exports = Router()
+
+passport.use(new TwitterStrategy({
+  consumerKey: config.twitter.consumerKey,
+  consumerSecret: config.twitter.consumerSecret,
+  callbackURL: config.serverurl + '/auth/twitter/callback'
+}, passportGeneralCallback))
+
+twitterAuth.get('/auth/twitter', function (req, res, next) {
+  setReturnToFromReferer(req)
+  passport.authenticate('twitter')(req, res, next)
+})
+
+// twitter auth callback
+twitterAuth.get('/auth/twitter/callback',
+  passport.authenticate('twitter', {
+    successReturnToOrRedirect: config.serverurl + '/',
+    failureRedirect: config.serverurl + '/'
+  })
+)
diff --git a/lib/web/auth/utils.js b/lib/web/auth/utils.js
new file mode 100644
index 000000000..ff7a12375
--- /dev/null
+++ b/lib/web/auth/utils.js
@@ -0,0 +1,53 @@
+'use strict'
+
+const models = require('../../models')
+const config = require('../../config')
+const logger = require('../../logger')
+
+exports.setReturnToFromReferer = function setReturnToFromReferer (req) {
+  var referer = req.get('referer')
+  if (!req.session) req.session = {}
+  req.session.returnTo = referer
+}
+
+exports.passportGeneralCallback = function callback (accessToken, refreshToken, profile, done) {
+  var stringifiedProfile = JSON.stringify(profile)
+  models.User.findOrCreate({
+    where: {
+      profileid: profile.id.toString()
+    },
+    defaults: {
+      profile: stringifiedProfile,
+      accessToken: accessToken,
+      refreshToken: refreshToken
+    }
+  }).spread(function (user, created) {
+    if (user) {
+      var needSave = false
+      if (user.profile !== stringifiedProfile) {
+        user.profile = stringifiedProfile
+        needSave = true
+      }
+      if (user.accessToken !== accessToken) {
+        user.accessToken = accessToken
+        needSave = true
+      }
+      if (user.refreshToken !== refreshToken) {
+        user.refreshToken = refreshToken
+        needSave = true
+      }
+      if (needSave) {
+        user.save().then(function () {
+          if (config.debug) { logger.info('user login: ' + user.id) }
+          return done(null, user)
+        })
+      } else {
+        if (config.debug) { logger.info('user login: ' + user.id) }
+        return done(null, user)
+      }
+    }
+  }).catch(function (err) {
+    logger.error('auth callback failed: ' + err)
+    return done(err, null)
+  })
+}