added user login/signup

2026-01-21 17:21:09 +01:00 · 2019-07-26 23:02:30 +08:00
parent ffb8cc5ef9
commit 607ad029dd
52 changed files with 2087 additions and 1100 deletions
--- a/backend/conf/config.yml
+++ b/backend/conf/config.yml
@@ -12,6 +12,7 @@ server:
  host: 0.0.0.0
  port: 8000
  master: "Y"
+  secret: "crawlab"
 spider:
  path: "/Users/yeqing/projects/crawlab/spiders"
 task:
--- a/backend/constants/user.go
+++ b/backend/constants/user.go
@@ -0,0 +1,6 @@
+package constants
+
+const (
+	RoleAdmin  = "admin"
+	RoleNormal = "normal"
+)
--- a/backend/go.mod
+++ b/backend/go.mod
@@ -4,6 +4,7 @@ go 1.12

 require (
 	github.com/apex/log v1.1.1
+	github.com/dgrijalva/jwt-go v3.2.0+incompatible
 	github.com/fsnotify/fsnotify v1.4.7
 	github.com/gin-gonic/gin v1.4.0
 	github.com/globalsign/mgo v0.0.0-20181015135952-eeefdecb41b8
--- a/backend/go.sum
+++ b/backend/go.sum
@@ -1,4 +1,5 @@
 cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
 github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
 github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
@@ -20,7 +21,9 @@ github.com/coreos/go-semver v0.2.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3Ee
 github.com/coreos/go-systemd v0.0.0-20190321100706-95778dfbb74e/go.mod h1:F5haX7vjVVG0kc13fIWeqUViNPyEJxv/OmvnBo0Yme4=
 github.com/coreos/pkg v0.0.0-20180928190104-399ea9e2e55f/go.mod h1:E3G3o1h8I7cfcXa63jLwjI0eiQQMgzzUDFVpN/nH/eA=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/dgrijalva/jwt-go v3.2.0+incompatible h1:7qlOGliEKZXTDg6OTjfoBKDXWrumCAMpl/TFQ4/5kLM=
 github.com/dgrijalva/jwt-go v3.2.0+incompatible/go.mod h1:E3ru+11k8xSBh+hMPgOLZmtrrCbhqsmaPHjLKYnJCaQ=
 github.com/dgryski/go-sip13 v0.0.0-20181026042036-e10d5fee7954/go.mod h1:vAd38F8PWV+bWy6jNmig1y/TA+kYO4g3RSRF0IAv0no=
 github.com/fatih/color v1.7.0/go.mod h1:Zm6kSWBoL9eyXnKyktHP6abPY2pDugNf5KwzbycvMj4=
@@ -60,14 +63,17 @@ github.com/hpcloud/tail v1.0.0/go.mod h1:ab1qPbhIpdTxEkNHXyeSf5vhxWSCs/tWer42PpO
 github.com/jmespath/go-jmespath v0.0.0-20180206201540-c2b33e8439af/go.mod h1:Nht3zPeWKUH0NzdCt2Blrr5ys8VGpn0CEB0cQHVjt7k=
 github.com/jonboulle/clockwork v0.1.0/go.mod h1:Ii8DK3G1RaLaWxj9trq07+26W01tbo22gdxWY5EU2bo=
 github.com/jpillora/backoff v0.0.0-20180909062703-3050d21c67d7/go.mod h1:2iMrUgbbvHEiQClaW2NsSzMyGHqN+rDFqY705q49KG0=
+github.com/json-iterator/go v1.1.6 h1:MrUvLMLTMxbqFJ9kzlvat/rYZqZnW3u4wkLzWTaFwKs=
 github.com/json-iterator/go v1.1.6/go.mod h1:+SdeFBvtyEkXs7REEP0seUULqWtbJapLOCVDaaPEHmU=
 github.com/julienschmidt/httprouter v1.2.0/go.mod h1:SYymIcj16QtmaHHD7aYtjjsJG7VTCxuUUipMqKk8s4w=
 github.com/kisielk/errcheck v1.1.0/go.mod h1:EZBBE59ingxPouuu3KfxchcWSUPOHkagtvWXihfKN4Q=
 github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+oQHNcck=
 github.com/konsorten/go-windows-terminal-sequences v1.0.1/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
 github.com/kr/logfmt v0.0.0-20140226030751-b84e30acd515/go.mod h1:+0opPa2QZZtGFBFZlji/RkVcI2GknAs/DXo4wKdlNEc=
+github.com/kr/pretty v0.1.0 h1:L/CwN0zerZDmRFUapSPitk6f+Q3+0za1rQkzVuMiMFI=
 github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
 github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
+github.com/kr/text v0.1.0 h1:45sCR5RtlFHMR4UwH9sdQ5TC8v0qDQCHnXt+kaKSTVE=
 github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
 github.com/magiconair/properties v1.8.0 h1:LLgXmsheXeRoUOBOjtwPQCWIYqM/LU1ayDtDePerRcY=
 github.com/magiconair/properties v1.8.0/go.mod h1:PppfXfuXeibc/6YijjN8zIbojt8czPbwD3XqdrwzmxQ=
@@ -81,7 +87,9 @@ github.com/matttproud/golang_protobuf_extensions v1.0.1/go.mod h1:D8He9yQNgCq6Z5
 github.com/mgutz/ansi v0.0.0-20170206155736-9520e82c474b/go.mod h1:01TrycV0kFyexm33Z7vhZRXopbI8J3TDReVlkTgMUxE=
 github.com/mitchellh/mapstructure v1.1.2 h1:fmNYVwqnSfB9mZU6OS2O6GsXM+wcskZDuKQzvN1EDeE=
 github.com/mitchellh/mapstructure v1.1.2/go.mod h1:FVVH3fgwuzCH5S8UJGiWEs2h04kUh9fWfEaFds41c1Y=
+github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd h1:TRLaZ9cD/w8PVh93nsPXa1VrQ6jlwL5oN8l14QlcNfg=
 github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=
+github.com/modern-go/reflect2 v1.0.1 h1:9f412s+6RmYXLWZSEzVVgPGK7C2PphHj5RJrvfx9AWI=
 github.com/modern-go/reflect2 v1.0.1/go.mod h1:bx2lNnkwVCuqBIxFjflWJWanXIb3RllmbCylyMrvgv0=
 github.com/mwitkow/go-conntrack v0.0.0-20161129095857-cc309e4a2223/go.mod h1:qRWi+5nqEBWmkhHvq77mSJWrCKwh8bxhgT7d/eI7P4U=
 github.com/oklog/ulid v1.3.1/go.mod h1:CirwcVhetQ6Lv90oh/F+FBtV6XMibvdAFo93nm5qn4U=
@@ -92,6 +100,7 @@ github.com/pelletier/go-toml v1.2.0/go.mod h1:5z9KED0ma1S8pY6P1sdut58dfprrGBbd/9
 github.com/pkg/errors v0.8.0/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pkg/errors v0.8.1 h1:iURUrRGxPUNPdy5/HRSm+Yj6okJ6UtLINN0Q9M4+h3I=
 github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/prometheus/client_golang v0.9.1/go.mod h1:7SWBe2y4D6OKWSNQJUaRYU/AaXPKyh/dDVn+NZz0KFw=
 github.com/prometheus/client_golang v0.9.3/go.mod h1:/TN21ttK/J9q6uSwhBd54HahCDft0ttaMvbicHlPoso=
@@ -126,6 +135,7 @@ github.com/spf13/viper v1.4.0/go.mod h1:PTJ7Z/lr49W6bUbkmS1V3by4uWynFiR9p7+dSq/y
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/objx v0.1.1/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
+github.com/stretchr/testify v1.3.0 h1:TivCn/peBQ7UY8ooIcPgZFpTNSz0Q2U6UrFlUfqbe0Q=
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
 github.com/tj/assert v0.0.0-20171129193455-018094318fb0/go.mod h1:mZ9/Rh9oLWpLLDRpvE+3b7gP/C2YyLFYxNmcLnPTMe0=
 github.com/tj/go-elastic v0.0.0-20171221160941-36157cbbebc2/go.mod h1:WjeM0Oo1eNAjXGDx2yma7uG2XoyRZTq1uv3M/o7imD0=
@@ -153,6 +163,7 @@ golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn
 golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
 golang.org/x/net v0.0.0-20190503192946-f4e77d36d62c/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
 golang.org/x/net v0.0.0-20190522155817-f3200d17e092/go.mod h1:HSz+uSET+XFnRR8LxR5pz3Of3rY3CfYBVs4xY44aLks=
+golang.org/x/net v0.0.0-20190620200207-3b0461eec859 h1:R/3boaszxrf1GEUWTVDzSKVwLmSJpwZ1yqXm8j0v2QI=
 golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
@@ -179,8 +190,10 @@ google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZi
 google.golang.org/grpc v1.21.0/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM=
 gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 h1:qIbj1fsPNlZgppZ+VLlY7N33q108Sa+fhmuc+sWQYwY=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys=
+gopkg.in/go-playground/assert.v1 v1.2.1 h1:xoYuJVE7KT85PYWrN730RguIQO0ePzVRfFMXadIrXTM=
 gopkg.in/go-playground/assert.v1 v1.2.1/go.mod h1:9RXL0bg/zibRAgZUYszZSwO/z8Y/a8bDuhia5mkpMnE=
 gopkg.in/go-playground/validator.v8 v8.18.2 h1:lFB4DoMU6B626w8ny76MV7VX6W2VHct2GVOI3xgiMrQ=
 gopkg.in/go-playground/validator.v8 v8.18.2/go.mod h1:RX2a/7Ha8BgOhfk7j780h4/u/RRjR0eouCJSH80/M2Y=
--- a/backend/main.go
+++ b/backend/main.go
@@ -71,6 +71,13 @@ func main() {
 	}
 	log.Info("初始化爬虫服务成功")

+	// 初始化用户服务
+	if err := services.InitUserService(); err != nil {
+		debug.PrintStack()
+		panic(err)
+	}
+	log.Info("初始化用户服务成功")
+
 	// 以下为主节点服务
 	if services.IsMaster() {
 		// 中间件
@@ -113,6 +120,13 @@ func main() {
 		app.DELETE("/schedules/:id", routes.DeleteSchedule) // 删除定时任务
 		// 统计数据
 		app.GET("/stats/home", routes.GetHomeStats) // 首页统计数据
+		// 用户
+		app.GET("/users", routes.GetUserList)       // 用户列表
+		app.GET("/users/:id", routes.GetUser)       // 用户详情
+		app.PUT("/users", routes.PutUser)           // 添加用户
+		app.POST("/users/:id", routes.PostUser)     // 更改用户
+		app.DELETE("/users/:id", routes.DeleteUser) // 删除用户
+		app.POST("/login", routes.Login)            // 用户登录
 	}

 	// 路由ping
--- a/backend/middlewares/auth.go
+++ b/backend/middlewares/auth.go
@@ -0,0 +1,8 @@
+package middlewares
+
+import "github.com/gin-gonic/gin"
+
+func AuthorizationMiddleware() gin.HandlerFunc {
+	return func(c *gin.Context) {
+	}
+}
--- a/backend/model/user.go
+++ b/backend/model/user.go
@@ -0,0 +1,105 @@
+package model
+
+import (
+	"crawlab/database"
+	"github.com/apex/log"
+	"github.com/globalsign/mgo"
+	"github.com/globalsign/mgo/bson"
+	"github.com/pkg/errors"
+	"runtime/debug"
+	"time"
+)
+
+type User struct {
+	Id       bson.ObjectId `json:"_id" bson:"_id"`
+	Username string        `json:"username" bson:"username"`
+	Password string        `json:"password" bson:"password"`
+	Role     string        `json:"role" bson:"role"`
+
+	CreateTs time.Time `json:"create_ts" bson:"create_ts"`
+	UpdateTs time.Time `json:"update_ts" bson:"update_ts"`
+}
+
+func (user *User) Add() error {
+	s, c := database.GetCol("users")
+	defer s.Close()
+
+	// 如果存在用户名相同的用户，抛错
+	user2, err := GetUserByUsername(user.Username)
+	if err != nil {
+		if err == mgo.ErrNotFound {
+			// pass
+		} else {
+			log.Errorf(err.Error())
+			debug.PrintStack()
+			return err
+		}
+	} else {
+		if user2.Username == user.Username {
+			return errors.New("username already exists")
+		}
+	}
+
+	user.Id = bson.NewObjectId()
+	user.UpdateTs = time.Now()
+	user.CreateTs = time.Now()
+	if err := c.Insert(user); err != nil {
+		log.Errorf(err.Error())
+		debug.PrintStack()
+		return err
+	}
+
+	return nil
+}
+
+func GetUser(id bson.ObjectId) (User, error) {
+	s, c := database.GetCol("users")
+	defer s.Close()
+	var user User
+	if err := c.Find(bson.M{"_id": id}).One(&user); err != nil {
+		log.Errorf(err.Error())
+		debug.PrintStack()
+		return user, err
+	}
+	return user, nil
+}
+
+func GetUserByUsername(username string) (User, error) {
+	s, c := database.GetCol("users")
+	defer s.Close()
+
+	var user User
+	if err := c.Find(bson.M{"username": username}).One(&user); err != nil {
+		if err != mgo.ErrNotFound {
+			log.Errorf(err.Error())
+			debug.PrintStack()
+			return user, err
+		}
+	}
+
+	return user, nil
+}
+
+func GetUserList(filter interface{}, skip int, limit int, sortKey string) ([]User, error) {
+	s, c := database.GetCol("tasks")
+	defer s.Close()
+
+	var users []User
+	if err := c.Find(filter).Skip(skip).Limit(limit).Sort(sortKey).All(&users); err != nil {
+		debug.PrintStack()
+		return users, err
+	}
+	return users, nil
+}
+
+func GetUserListTotal(filter interface{}) (int, error) {
+	s, c := database.GetCol("users")
+	defer s.Close()
+
+	var result int
+	result, err := c.Find(filter).Count()
+	if err != nil {
+		return result, err
+	}
+	return result, nil
+}
--- a/backend/routes/user.go
+++ b/backend/routes/user.go
@@ -0,0 +1,141 @@
+package routes
+
+import (
+	"crawlab/constants"
+	"crawlab/model"
+	"crawlab/services"
+	"crawlab/utils"
+	"github.com/gin-gonic/gin"
+	"github.com/globalsign/mgo/bson"
+	"github.com/pkg/errors"
+	"net/http"
+)
+
+type UserListRequestData struct {
+	PageNum  int `form:"page_num"`
+	PageSize int `form:"page_size"`
+}
+
+type UserRequestData struct {
+	Username string `json:"username"`
+	Password string `json:"password"`
+}
+
+func GetUser(c *gin.Context) {
+	id := c.Param("id")
+
+	user, err := model.GetUser(bson.ObjectIdHex(id))
+	if err != nil {
+		HandleError(http.StatusInternalServerError, c, err)
+		return
+	}
+
+	c.JSON(http.StatusOK, Response{
+		Status:  "ok",
+		Message: "success",
+		Data:    user,
+	})
+}
+
+func GetUserList(c *gin.Context) {
+	// 绑定数据
+	data := UserListRequestData{}
+	if err := c.ShouldBindQuery(&data); err != nil {
+		HandleError(http.StatusBadRequest, c, err)
+		return
+	}
+	if data.PageNum == 0 {
+		data.PageNum = 1
+	}
+	if data.PageSize == 0 {
+		data.PageNum = 10
+	}
+
+	// 获取用户列表
+	users, err := model.GetUserList(nil, (data.PageNum-1)*data.PageSize, data.PageSize, "-create_ts")
+	if err != nil {
+		HandleError(http.StatusInternalServerError, c, err)
+		return
+	}
+
+	// 获取总用户数
+	total, err := model.GetTaskListTotal(nil)
+	if err != nil {
+		HandleError(http.StatusInternalServerError, c, err)
+		return
+	}
+
+	c.JSON(http.StatusOK, ListResponse{
+		Status:  "ok",
+		Message: "success",
+		Data:    users,
+		Total:   total,
+	})
+}
+
+func PutUser(c *gin.Context) {
+	// 绑定请求数据
+	var reqData UserRequestData
+	if err := c.ShouldBindJSON(&reqData); err != nil {
+		HandleError(http.StatusBadRequest, c, err)
+		return
+	}
+
+	// 添加用户
+	user := model.User{
+		Username: reqData.Username,
+		Password: utils.EncryptPassword(reqData.Password),
+		Role:     constants.RoleNormal,
+	}
+	if err := user.Add(); err != nil {
+		HandleError(http.StatusInternalServerError, c, err)
+		return
+	}
+
+	c.JSON(http.StatusOK, Response{
+		Status:  "ok",
+		Message: "success",
+	})
+}
+
+func PostUser(c *gin.Context) {
+}
+
+func DeleteUser(c *gin.Context) {
+}
+
+func Login(c *gin.Context) {
+	// 绑定请求数据
+	var reqData UserRequestData
+	if err := c.ShouldBindJSON(&reqData); err != nil {
+		HandleError(http.StatusUnauthorized, c, errors.New("not authorized"))
+		return
+	}
+
+	// 获取用户
+	user, err := model.GetUserByUsername(reqData.Username)
+	if err != nil {
+		HandleError(http.StatusUnauthorized, c, errors.New("not authorized"))
+		return
+	}
+
+	// 校验密码
+	encPassword := utils.EncryptPassword(reqData.Password)
+	if user.Password != encPassword {
+		HandleError(http.StatusUnauthorized, c, errors.New("not authorized"))
+		return
+	}
+
+	// 获取token
+	tokenStr, err := services.GetToken(user.Username)
+	if err != nil {
+		HandleError(http.StatusUnauthorized, c, errors.New("not authorized"))
+		return
+	}
+
+	c.JSON(http.StatusOK, Response{
+		Status:  "ok",
+		Message: "success",
+		Data:    tokenStr,
+	})
+}
--- a/backend/services/system.go
+++ b/backend/services/system.go
@@ -33,6 +33,8 @@ var executableNameMap = map[string]string{
 	"go": "Go",
 	// node
 	"node": "NodeJS",
+	// php
+	"php": "PHP",
 	// windows command
 	"cmd": "Windows Command Prompt",
 	// linux shell
--- a/backend/services/user.go
+++ b/backend/services/user.go
@@ -0,0 +1,45 @@
+package services
+
+import (
+	"crawlab/constants"
+	"crawlab/model"
+	"crawlab/utils"
+	"github.com/apex/log"
+	"github.com/dgrijalva/jwt-go"
+	"github.com/spf13/viper"
+	"runtime/debug"
+	"time"
+)
+
+func InitUserService() error {
+	adminUser := model.User{
+		Username: "admin",
+		Password: utils.EncryptPassword("admin"),
+		Role:     constants.RoleAdmin,
+	}
+	if err := adminUser.Add(); err != nil {
+		// pass
+	}
+	return nil
+}
+
+func GetToken(username string) (tokenStr string, err error) {
+	user, err := model.GetUserByUsername(username)
+	if err != nil {
+		log.Errorf(err.Error())
+		debug.PrintStack()
+		return
+	}
+
+	token := jwt.NewWithClaims(jwt.SigningMethodHS256, jwt.MapClaims{
+		"id":       user.Id,
+		"username": user.Username,
+		"nbf":      time.Now().Unix(),
+	})
+
+	tokenStr, err = token.SignedString([]byte(viper.GetString("server.secret")))
+	if err != nil {
+		return
+	}
+	return
+}
--- a/backend/utils/user.go
+++ b/backend/utils/user.go
@@ -0,0 +1,14 @@
+package utils
+
+import (
+	"crypto/md5"
+	"fmt"
+	"io"
+)
+
+func EncryptPassword(str string) string {
+	w := md5.New()
+	io.WriteString(w, str)
+	md5str := fmt.Sprintf("%x", w.Sum(nil))
+	return md5str
+}
--- a/backend/vendor/github.com/dgrijalva/jwt-go/.gitignore
+++ b/backend/vendor/github.com/dgrijalva/jwt-go/.gitignore
@@ -0,0 +1,4 @@
+.DS_Store
+bin
+
+
--- a/backend/vendor/github.com/dgrijalva/jwt-go/.travis.yml
+++ b/backend/vendor/github.com/dgrijalva/jwt-go/.travis.yml
@@ -0,0 +1,13 @@
+language: go
+
+script:
+    - go vet ./...
+    - go test -v ./...
+
+go:
+  - 1.3
+  - 1.4
+  - 1.5
+  - 1.6
+  - 1.7
+  - tip
--- a/backend/vendor/github.com/dgrijalva/jwt-go/LICENSE
+++ b/backend/vendor/github.com/dgrijalva/jwt-go/LICENSE
@@ -0,0 +1,8 @@
+Copyright (c) 2012 Dave Grijalva
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
--- a/backend/vendor/github.com/dgrijalva/jwt-go/MIGRATION_GUIDE.md
+++ b/backend/vendor/github.com/dgrijalva/jwt-go/MIGRATION_GUIDE.md
@@ -0,0 +1,97 @@
+## Migration Guide from v2 -> v3
+
+Version 3 adds several new, frequently requested features.  To do so, it introduces a few breaking changes.  We've worked to keep these as minimal as possible.  This guide explains the breaking changes and how you can quickly update your code.
+
+### `Token.Claims` is now an interface type
+
+The most requested feature from the 2.0 verison of this library was the ability to provide a custom type to the JSON parser for claims. This was implemented by introducing a new interface, `Claims`, to replace `map[string]interface{}`.  We also included two concrete implementations of `Claims`: `MapClaims` and `StandardClaims`.
+
+`MapClaims` is an alias for `map[string]interface{}` with built in validation behavior.  It is the default claims type when using `Parse`.  The usage is unchanged except you must type cast the claims property.
+
+The old example for parsing a token looked like this..
+
+```go
+	if token, err := jwt.Parse(tokenString, keyLookupFunc); err == nil {
+		fmt.Printf("Token for user %v expires %v", token.Claims["user"], token.Claims["exp"])
+	}
+```
+
+is now directly mapped to...
+
+```go
+	if token, err := jwt.Parse(tokenString, keyLookupFunc); err == nil {
+		claims := token.Claims.(jwt.MapClaims)
+		fmt.Printf("Token for user %v expires %v", claims["user"], claims["exp"])
+	}
+```
+
+`StandardClaims` is designed to be embedded in your custom type.  You can supply a custom claims type with the new `ParseWithClaims` function.  Here's an example of using a custom claims type.
+
+```go
+	type MyCustomClaims struct {
+		User string
+		*StandardClaims
+	}
+	
+	if token, err := jwt.ParseWithClaims(tokenString, &MyCustomClaims{}, keyLookupFunc); err == nil {
+		claims := token.Claims.(*MyCustomClaims)
+		fmt.Printf("Token for user %v expires %v", claims.User, claims.StandardClaims.ExpiresAt)
+	}
+```
+
+### `ParseFromRequest` has been moved
+
+To keep this library focused on the tokens without becoming overburdened with complex request processing logic, `ParseFromRequest` and its new companion `ParseFromRequestWithClaims` have been moved to a subpackage, `request`.  The method signatues have also been augmented to receive a new argument: `Extractor`.
+
+`Extractors` do the work of picking the token string out of a request.  The interface is simple and composable.
+
+This simple parsing example:
+
+```go
+	if token, err := jwt.ParseFromRequest(tokenString, req, keyLookupFunc); err == nil {
+		fmt.Printf("Token for user %v expires %v", token.Claims["user"], token.Claims["exp"])
+	}
+```
+
+is directly mapped to:
+
+```go
+	if token, err := request.ParseFromRequest(req, request.OAuth2Extractor, keyLookupFunc); err == nil {
+		claims := token.Claims.(jwt.MapClaims)
+		fmt.Printf("Token for user %v expires %v", claims["user"], claims["exp"])
+	}
+```
+
+There are several concrete `Extractor` types provided for your convenience:
+
+* `HeaderExtractor` will search a list of headers until one contains content.
+* `ArgumentExtractor` will search a list of keys in request query and form arguments until one contains content.
+* `MultiExtractor` will try a list of `Extractors` in order until one returns content.
+* `AuthorizationHeaderExtractor` will look in the `Authorization` header for a `Bearer` token.
+* `OAuth2Extractor` searches the places an OAuth2 token would be specified (per the spec): `Authorization` header and `access_token` argument
+* `PostExtractionFilter` wraps an `Extractor`, allowing you to process the content before it's parsed.  A simple example is stripping the `Bearer ` text from a header
+
+
+### RSA signing methods no longer accept `[]byte` keys
+
+Due to a [critical vulnerability](https://auth0.com/blog/2015/03/31/critical-vulnerabilities-in-json-web-token-libraries/), we've decided the convenience of accepting `[]byte` instead of `rsa.PublicKey` or `rsa.PrivateKey` isn't worth the risk of misuse.
+
+To replace this behavior, we've added two helper methods: `ParseRSAPrivateKeyFromPEM(key []byte) (*rsa.PrivateKey, error)` and `ParseRSAPublicKeyFromPEM(key []byte) (*rsa.PublicKey, error)`.  These are just simple helpers for unpacking PEM encoded PKCS1 and PKCS8 keys. If your keys are encoded any other way, all you need to do is convert them to the `crypto/rsa` package's types.
+
+```go 
+	func keyLookupFunc(*Token) (interface{}, error) {
+		// Don't forget to validate the alg is what you expect:
+		if _, ok := token.Method.(*jwt.SigningMethodRSA); !ok {
+			return nil, fmt.Errorf("Unexpected signing method: %v", token.Header["alg"])
+		}
+		
+		// Look up key 
+		key, err := lookupPublicKey(token.Header["kid"])
+		if err != nil {
+			return nil, err
+		}
+		
+		// Unpack key from PEM encoded PKCS8
+		return jwt.ParseRSAPublicKeyFromPEM(key)
+	}
+```
--- a/backend/vendor/github.com/dgrijalva/jwt-go/README.md
+++ b/backend/vendor/github.com/dgrijalva/jwt-go/README.md
@@ -0,0 +1,100 @@
+# jwt-go
+
+[![Build Status](https://travis-ci.org/dgrijalva/jwt-go.svg?branch=master)](https://travis-ci.org/dgrijalva/jwt-go)
+[![GoDoc](https://godoc.org/github.com/dgrijalva/jwt-go?status.svg)](https://godoc.org/github.com/dgrijalva/jwt-go)
+
+A [go](http://www.golang.org) (or 'golang' for search engine friendliness) implementation of [JSON Web Tokens](http://self-issued.info/docs/draft-ietf-oauth-json-web-token.html)
+
+**NEW VERSION COMING:** There have been a lot of improvements suggested since the version 3.0.0 released in 2016. I'm working now on cutting two different releases: 3.2.0 will contain any non-breaking changes or enhancements. 4.0.0 will follow shortly which will include breaking changes. See the 4.0.0 milestone to get an idea of what's coming. If you have other ideas, or would like to participate in 4.0.0, now's the time. If you depend on this library and don't want to be interrupted, I recommend you use your dependency mangement tool to pin to version 3. 
+
+**SECURITY NOTICE:** Some older versions of Go have a security issue in the cryotp/elliptic. Recommendation is to upgrade to at least 1.8.3. See issue #216 for more detail.
+
+**SECURITY NOTICE:** It's important that you [validate the `alg` presented is what you expect](https://auth0.com/blog/2015/03/31/critical-vulnerabilities-in-json-web-token-libraries/). This library attempts to make it easy to do the right thing by requiring key types match the expected alg, but you should take the extra step to verify it in your usage.  See the examples provided.
+
+## What the heck is a JWT?
+
+JWT.io has [a great introduction](https://jwt.io/introduction) to JSON Web Tokens.
+
+In short, it's a signed JSON object that does something useful (for example, authentication).  It's commonly used for `Bearer` tokens in Oauth 2.  A token is made of three parts, separated by `.`'s.  The first two parts are JSON objects, that have been [base64url](http://tools.ietf.org/html/rfc4648) encoded.  The last part is the signature, encoded the same way.
+
+The first part is called the header.  It contains the necessary information for verifying the last part, the signature.  For example, which encryption method was used for signing and what key was used.
+
+The part in the middle is the interesting bit.  It's called the Claims and contains the actual stuff you care about.  Refer to [the RFC](http://self-issued.info/docs/draft-jones-json-web-token.html) for information about reserved keys and the proper way to add your own.
+
+## What's in the box?
+
+This library supports the parsing and verification as well as the generation and signing of JWTs.  Current supported signing algorithms are HMAC SHA, RSA, RSA-PSS, and ECDSA, though hooks are present for adding your own.
+
+## Examples
+
+See [the project documentation](https://godoc.org/github.com/dgrijalva/jwt-go) for examples of usage:
+
+* [Simple example of parsing and validating a token](https://godoc.org/github.com/dgrijalva/jwt-go#example-Parse--Hmac)
+* [Simple example of building and signing a token](https://godoc.org/github.com/dgrijalva/jwt-go#example-New--Hmac)
+* [Directory of Examples](https://godoc.org/github.com/dgrijalva/jwt-go#pkg-examples)
+
+## Extensions
+
+This library publishes all the necessary components for adding your own signing methods.  Simply implement the `SigningMethod` interface and register a factory method using `RegisterSigningMethod`.  
+
+Here's an example of an extension that integrates with the Google App Engine signing tools: https://github.com/someone1/gcp-jwt-go
+
+## Compliance
+
+This library was last reviewed to comply with [RTF 7519](http://www.rfc-editor.org/info/rfc7519) dated May 2015 with a few notable differences:
+
+* In order to protect against accidental use of [Unsecured JWTs](http://self-issued.info/docs/draft-ietf-oauth-json-web-token.html#UnsecuredJWT), tokens using `alg=none` will only be accepted if the constant `jwt.UnsafeAllowNoneSignatureType` is provided as the key.
+
+## Project Status & Versioning
+
+This library is considered production ready.  Feedback and feature requests are appreciated.  The API should be considered stable.  There should be very few backwards-incompatible changes outside of major version updates (and only with good reason).
+
+This project uses [Semantic Versioning 2.0.0](http://semver.org).  Accepted pull requests will land on `master`.  Periodically, versions will be tagged from `master`.  You can find all the releases on [the project releases page](https://github.com/dgrijalva/jwt-go/releases).
+
+While we try to make it obvious when we make breaking changes, there isn't a great mechanism for pushing announcements out to users.  You may want to use this alternative package include: `gopkg.in/dgrijalva/jwt-go.v3`.  It will do the right thing WRT semantic versioning.
+
+**BREAKING CHANGES:*** 
+* Version 3.0.0 includes _a lot_ of changes from the 2.x line, including a few that break the API.  We've tried to break as few things as possible, so there should just be a few type signature changes.  A full list of breaking changes is available in `VERSION_HISTORY.md`.  See `MIGRATION_GUIDE.md` for more information on updating your code.
+
+## Usage Tips
+
+### Signing vs Encryption
+
+A token is simply a JSON object that is signed by its author. this tells you exactly two things about the data:
+
+* The author of the token was in the possession of the signing secret
+* The data has not been modified since it was signed
+
+It's important to know that JWT does not provide encryption, which means anyone who has access to the token can read its contents. If you need to protect (encrypt) the data, there is a companion spec, `JWE`, that provides this functionality. JWE is currently outside the scope of this library.
+
+### Choosing a Signing Method
+
+There are several signing methods available, and you should probably take the time to learn about the various options before choosing one.  The principal design decision is most likely going to be symmetric vs asymmetric.
+
+Symmetric signing methods, such as HSA, use only a single secret. This is probably the simplest signing method to use since any `[]byte` can be used as a valid secret. They are also slightly computationally faster to use, though this rarely is enough to matter. Symmetric signing methods work the best when both producers and consumers of tokens are trusted, or even the same system. Since the same secret is used to both sign and validate tokens, you can't easily distribute the key for validation.
+
+Asymmetric signing methods, such as RSA, use different keys for signing and verifying tokens. This makes it possible to produce tokens with a private key, and allow any consumer to access the public key for verification.
+
+### Signing Methods and Key Types
+
+Each signing method expects a different object type for its signing keys. See the package documentation for details. Here are the most common ones:
+
+* The [HMAC signing method](https://godoc.org/github.com/dgrijalva/jwt-go#SigningMethodHMAC) (`HS256`,`HS384`,`HS512`) expect `[]byte` values for signing and validation
+* The [RSA signing method](https://godoc.org/github.com/dgrijalva/jwt-go#SigningMethodRSA) (`RS256`,`RS384`,`RS512`) expect `*rsa.PrivateKey` for signing and `*rsa.PublicKey` for validation
+* The [ECDSA signing method](https://godoc.org/github.com/dgrijalva/jwt-go#SigningMethodECDSA) (`ES256`,`ES384`,`ES512`) expect `*ecdsa.PrivateKey` for signing and `*ecdsa.PublicKey` for validation
+
+### JWT and OAuth
+
+It's worth mentioning that OAuth and JWT are not the same thing. A JWT token is simply a signed JSON object. It can be used anywhere such a thing is useful. There is some confusion, though, as JWT is the most common type of bearer token used in OAuth2 authentication.
+
+Without going too far down the rabbit hole, here's a description of the interaction of these technologies:
+
+* OAuth is a protocol for allowing an identity provider to be separate from the service a user is logging in to. For example, whenever you use Facebook to log into a different service (Yelp, Spotify, etc), you are using OAuth.
+* OAuth defines several options for passing around authentication data. One popular method is called a "bearer token". A bearer token is simply a string that _should_ only be held by an authenticated user. Thus, simply presenting this token proves your identity. You can probably derive from here why a JWT might make a good bearer token.
+* Because bearer tokens are used for authentication, it's important they're kept secret. This is why transactions that use bearer tokens typically happen over SSL.
+
+## More
+
+Documentation can be found [on godoc.org](http://godoc.org/github.com/dgrijalva/jwt-go).
+
+The command line utility included in this project (cmd/jwt) provides a straightforward example of token creation and parsing as well as a useful tool for debugging your own integration. You'll also find several implementation examples in the documentation.
--- a/backend/vendor/github.com/dgrijalva/jwt-go/VERSION_HISTORY.md
+++ b/backend/vendor/github.com/dgrijalva/jwt-go/VERSION_HISTORY.md
@@ -0,0 +1,118 @@
+## `jwt-go` Version History
+
+#### 3.2.0
+
+* Added method `ParseUnverified` to allow users to split up the tasks of parsing and validation
+* HMAC signing method returns `ErrInvalidKeyType` instead of `ErrInvalidKey` where appropriate
+* Added options to `request.ParseFromRequest`, which allows for an arbitrary list of modifiers to parsing behavior. Initial set include `WithClaims` and `WithParser`. Existing usage of this function will continue to work as before.
+* Deprecated `ParseFromRequestWithClaims` to simplify API in the future.
+
+#### 3.1.0
+
+* Improvements to `jwt` command line tool
+* Added `SkipClaimsValidation` option to `Parser`
+* Documentation updates
+
+#### 3.0.0
+
+* **Compatibility Breaking Changes**: See MIGRATION_GUIDE.md for tips on updating your code
+	* Dropped support for `[]byte` keys when using RSA signing methods.  This convenience feature could contribute to security vulnerabilities involving mismatched key types with signing methods.
+	* `ParseFromRequest` has been moved to `request` subpackage and usage has changed
+	* The `Claims` property on `Token` is now type `Claims` instead of `map[string]interface{}`.  The default value is type `MapClaims`, which is an alias to `map[string]interface{}`.  This makes it possible to use a custom type when decoding claims.
+* Other Additions and Changes
+	* Added `Claims` interface type to allow users to decode the claims into a custom type
+	* Added `ParseWithClaims`, which takes a third argument of type `Claims`.  Use this function instead of `Parse` if you have a custom type you'd like to decode into.
+	* Dramatically improved the functionality and flexibility of `ParseFromRequest`, which is now in the `request` subpackage
+	* Added `ParseFromRequestWithClaims` which is the `FromRequest` equivalent of `ParseWithClaims`
+	* Added new interface type `Extractor`, which is used for extracting JWT strings from http requests.  Used with `ParseFromRequest` and `ParseFromRequestWithClaims`.
+	* Added several new, more specific, validation errors to error type bitmask
+	* Moved examples from README to executable example files
+	* Signing method registry is now thread safe
+	* Added new property to `ValidationError`, which contains the raw error returned by calls made by parse/verify (such as those returned by keyfunc or json parser)
+
+#### 2.7.0
+
+This will likely be the last backwards compatible release before 3.0.0, excluding essential bug fixes.
+
+* Added new option `-show` to the `jwt` command that will just output the decoded token without verifying
+* Error text for expired tokens includes how long it's been expired
+* Fixed incorrect error returned from `ParseRSAPublicKeyFromPEM`
+* Documentation updates
+
+#### 2.6.0
+
+* Exposed inner error within ValidationError
+* Fixed validation errors when using UseJSONNumber flag
+* Added several unit tests
+
+#### 2.5.0
+
+* Added support for signing method none.  You shouldn't use this.  The API tries to make this clear.
+* Updated/fixed some documentation
+* Added more helpful error message when trying to parse tokens that begin with `BEARER `
+
+#### 2.4.0
+
+* Added new type, Parser, to allow for configuration of various parsing parameters
+	* You can now specify a list of valid signing methods.  Anything outside this set will be rejected.
+	* You can now opt to use the `json.Number` type instead of `float64` when parsing token JSON
+* Added support for [Travis CI](https://travis-ci.org/dgrijalva/jwt-go)
+* Fixed some bugs with ECDSA parsing
+
+#### 2.3.0
+
+* Added support for ECDSA signing methods
+* Added support for RSA PSS signing methods (requires go v1.4)
+
+#### 2.2.0
+
+* Gracefully handle a `nil` `Keyfunc` being passed to `Parse`.  Result will now be the parsed token and an error, instead of a panic.
+
+#### 2.1.0
+
+Backwards compatible API change that was missed in 2.0.0.
+
+* The `SignedString` method on `Token` now takes `interface{}` instead of `[]byte`
+
+#### 2.0.0
+
+There were two major reasons for breaking backwards compatibility with this update.  The first was a refactor required to expand the width of the RSA and HMAC-SHA signing implementations.  There will likely be no required code changes to support this change.
+
+The second update, while unfortunately requiring a small change in integration, is required to open up this library to other signing methods.  Not all keys used for all signing methods have a single standard on-disk representation.  Requiring `[]byte` as the type for all keys proved too limiting.  Additionally, this implementation allows for pre-parsed tokens to be reused, which might matter in an application that parses a high volume of tokens with a small set of keys.  Backwards compatibilty has been maintained for passing `[]byte` to the RSA signing methods, but they will also accept `*rsa.PublicKey` and `*rsa.PrivateKey`.
+
+It is likely the only integration change required here will be to change `func(t *jwt.Token) ([]byte, error)` to `func(t *jwt.Token) (interface{}, error)` when calling `Parse`.
+
+* **Compatibility Breaking Changes**
+	* `SigningMethodHS256` is now `*SigningMethodHMAC` instead of `type struct`
+	* `SigningMethodRS256` is now `*SigningMethodRSA` instead of `type struct`
+	* `KeyFunc` now returns `interface{}` instead of `[]byte`
+	* `SigningMethod.Sign` now takes `interface{}` instead of `[]byte` for the key
+	* `SigningMethod.Verify` now takes `interface{}` instead of `[]byte` for the key
+* Renamed type `SigningMethodHS256` to `SigningMethodHMAC`.  Specific sizes are now just instances of this type.
+    * Added public package global `SigningMethodHS256`
+    * Added public package global `SigningMethodHS384`
+    * Added public package global `SigningMethodHS512`
+* Renamed type `SigningMethodRS256` to `SigningMethodRSA`.  Specific sizes are now just instances of this type.
+    * Added public package global `SigningMethodRS256`
+    * Added public package global `SigningMethodRS384`
+    * Added public package global `SigningMethodRS512`
+* Moved sample private key for HMAC tests from an inline value to a file on disk.  Value is unchanged.
+* Refactored the RSA implementation to be easier to read
+* Exposed helper methods `ParseRSAPrivateKeyFromPEM` and `ParseRSAPublicKeyFromPEM`
+
+#### 1.0.2
+
+* Fixed bug in parsing public keys from certificates
+* Added more tests around the parsing of keys for RS256
+* Code refactoring in RS256 implementation.  No functional changes
+
+#### 1.0.1
+
+* Fixed panic if RS256 signing method was passed an invalid key
+
+#### 1.0.0
+
+* First versioned release
+* API stabilized
+* Supports creating, signing, parsing, and validating JWT tokens
+* Supports RS256 and HS256 signing methods
--- a/backend/vendor/github.com/dgrijalva/jwt-go/claims.go
+++ b/backend/vendor/github.com/dgrijalva/jwt-go/claims.go
@@ -0,0 +1,134 @@
+package jwt
+
+import (
+	"crypto/subtle"
+	"fmt"
+	"time"
+)
+
+// For a type to be a Claims object, it must just have a Valid method that determines
+// if the token is invalid for any supported reason
+type Claims interface {
+	Valid() error
+}
+
+// Structured version of Claims Section, as referenced at
+// https://tools.ietf.org/html/rfc7519#section-4.1
+// See examples for how to use this with your own claim types
+type StandardClaims struct {
+	Audience  string `json:"aud,omitempty"`
+	ExpiresAt int64  `json:"exp,omitempty"`
+	Id        string `json:"jti,omitempty"`
+	IssuedAt  int64  `json:"iat,omitempty"`
+	Issuer    string `json:"iss,omitempty"`
+	NotBefore int64  `json:"nbf,omitempty"`
+	Subject   string `json:"sub,omitempty"`
+}
+
+// Validates time based claims "exp, iat, nbf".
+// There is no accounting for clock skew.
+// As well, if any of the above claims are not in the token, it will still
+// be considered a valid claim.
+func (c StandardClaims) Valid() error {
+	vErr := new(ValidationError)
+	now := TimeFunc().Unix()
+
+	// The claims below are optional, by default, so if they are set to the
+	// default value in Go, let's not fail the verification for them.
+	if c.VerifyExpiresAt(now, false) == false {
+		delta := time.Unix(now, 0).Sub(time.Unix(c.ExpiresAt, 0))
+		vErr.Inner = fmt.Errorf("token is expired by %v", delta)
+		vErr.Errors |= ValidationErrorExpired
+	}
+
+	if c.VerifyIssuedAt(now, false) == false {
+		vErr.Inner = fmt.Errorf("Token used before issued")
+		vErr.Errors |= ValidationErrorIssuedAt
+	}
+
+	if c.VerifyNotBefore(now, false) == false {
+		vErr.Inner = fmt.Errorf("token is not valid yet")
+		vErr.Errors |= ValidationErrorNotValidYet
+	}
+
+	if vErr.valid() {
+		return nil
+	}
+
+	return vErr
+}
+
+// Compares the aud claim against cmp.
+// If required is false, this method will return true if the value matches or is unset
+func (c *StandardClaims) VerifyAudience(cmp string, req bool) bool {
+	return verifyAud(c.Audience, cmp, req)
+}
+
+// Compares the exp claim against cmp.
+// If required is false, this method will return true if the value matches or is unset
+func (c *StandardClaims) VerifyExpiresAt(cmp int64, req bool) bool {
+	return verifyExp(c.ExpiresAt, cmp, req)
+}
+
+// Compares the iat claim against cmp.
+// If required is false, this method will return true if the value matches or is unset
+func (c *StandardClaims) VerifyIssuedAt(cmp int64, req bool) bool {
+	return verifyIat(c.IssuedAt, cmp, req)
+}
+
+// Compares the iss claim against cmp.
+// If required is false, this method will return true if the value matches or is unset
+func (c *StandardClaims) VerifyIssuer(cmp string, req bool) bool {
+	return verifyIss(c.Issuer, cmp, req)
+}
+
+// Compares the nbf claim against cmp.
+// If required is false, this method will return true if the value matches or is unset
+func (c *StandardClaims) VerifyNotBefore(cmp int64, req bool) bool {
+	return verifyNbf(c.NotBefore, cmp, req)
+}
+
+// ----- helpers
+
+func verifyAud(aud string, cmp string, required bool) bool {
+	if aud == "" {
+		return !required
+	}
+	if subtle.ConstantTimeCompare([]byte(aud), []byte(cmp)) != 0 {
+		return true
+	} else {
+		return false
+	}
+}
+
+func verifyExp(exp int64, now int64, required bool) bool {
+	if exp == 0 {
+		return !required
+	}
+	return now <= exp
+}
+
+func verifyIat(iat int64, now int64, required bool) bool {
+	if iat == 0 {
+		return !required
+	}
+	return now >= iat
+}
+
+func verifyIss(iss string, cmp string, required bool) bool {
+	if iss == "" {
+		return !required
+	}
+	if subtle.ConstantTimeCompare([]byte(iss), []byte(cmp)) != 0 {
+		return true
+	} else {
+		return false
+	}
+}
+
+func verifyNbf(nbf int64, now int64, required bool) bool {
+	if nbf == 0 {
+		return !required
+	}
+	return now >= nbf
+}
--- a/backend/vendor/github.com/dgrijalva/jwt-go/doc.go
+++ b/backend/vendor/github.com/dgrijalva/jwt-go/doc.go
@@ -0,0 +1,4 @@
+// Package jwt is a Go implementation of JSON Web Tokens: http://self-issued.info/docs/draft-jones-json-web-token.html
+//
+// See README.md for more info.
+package jwt
--- a/backend/vendor/github.com/dgrijalva/jwt-go/ecdsa.go
+++ b/backend/vendor/github.com/dgrijalva/jwt-go/ecdsa.go
@@ -0,0 +1,148 @@
+package jwt
+
+import (
+	"crypto"
+	"crypto/ecdsa"
+	"crypto/rand"
+	"errors"
+	"math/big"
+)
+
+var (
+	// Sadly this is missing from crypto/ecdsa compared to crypto/rsa
+	ErrECDSAVerification = errors.New("crypto/ecdsa: verification error")
+)
+
+// Implements the ECDSA family of signing methods signing methods
+// Expects *ecdsa.PrivateKey for signing and *ecdsa.PublicKey for verification
+type SigningMethodECDSA struct {
+	Name      string
+	Hash      crypto.Hash
+	KeySize   int
+	CurveBits int
+}
+
+// Specific instances for EC256 and company
+var (
+	SigningMethodES256 *SigningMethodECDSA
+	SigningMethodES384 *SigningMethodECDSA
+	SigningMethodES512 *SigningMethodECDSA
+)
+
+func init() {
+	// ES256
+	SigningMethodES256 = &SigningMethodECDSA{"ES256", crypto.SHA256, 32, 256}
+	RegisterSigningMethod(SigningMethodES256.Alg(), func() SigningMethod {
+		return SigningMethodES256
+	})
+
+	// ES384
+	SigningMethodES384 = &SigningMethodECDSA{"ES384", crypto.SHA384, 48, 384}
+	RegisterSigningMethod(SigningMethodES384.Alg(), func() SigningMethod {
+		return SigningMethodES384
+	})
+
+	// ES512
+	SigningMethodES512 = &SigningMethodECDSA{"ES512", crypto.SHA512, 66, 521}
+	RegisterSigningMethod(SigningMethodES512.Alg(), func() SigningMethod {
+		return SigningMethodES512
+	})
+}
+
+func (m *SigningMethodECDSA) Alg() string {
+	return m.Name
+}
+
+// Implements the Verify method from SigningMethod
+// For this verify method, key must be an ecdsa.PublicKey struct
+func (m *SigningMethodECDSA) Verify(signingString, signature string, key interface{}) error {
+	var err error
+
+	// Decode the signature
+	var sig []byte
+	if sig, err = DecodeSegment(signature); err != nil {
+		return err
+	}
+
+	// Get the key
+	var ecdsaKey *ecdsa.PublicKey
+	switch k := key.(type) {
+	case *ecdsa.PublicKey:
+		ecdsaKey = k
+	default:
+		return ErrInvalidKeyType
+	}
+
+	if len(sig) != 2*m.KeySize {
+		return ErrECDSAVerification
+	}
+
+	r := big.NewInt(0).SetBytes(sig[:m.KeySize])
+	s := big.NewInt(0).SetBytes(sig[m.KeySize:])
+
+	// Create hasher
+	if !m.Hash.Available() {
+		return ErrHashUnavailable
+	}
+	hasher := m.Hash.New()
+	hasher.Write([]byte(signingString))
+
+	// Verify the signature
+	if verifystatus := ecdsa.Verify(ecdsaKey, hasher.Sum(nil), r, s); verifystatus == true {
+		return nil
+	} else {
+		return ErrECDSAVerification
+	}
+}
+
+// Implements the Sign method from SigningMethod
+// For this signing method, key must be an ecdsa.PrivateKey struct
+func (m *SigningMethodECDSA) Sign(signingString string, key interface{}) (string, error) {
+	// Get the key
+	var ecdsaKey *ecdsa.PrivateKey
+	switch k := key.(type) {
+	case *ecdsa.PrivateKey:
+		ecdsaKey = k
+	default:
+		return "", ErrInvalidKeyType
+	}
+
+	// Create the hasher
+	if !m.Hash.Available() {
+		return "", ErrHashUnavailable
+	}
+
+	hasher := m.Hash.New()
+	hasher.Write([]byte(signingString))
+
+	// Sign the string and return r, s
+	if r, s, err := ecdsa.Sign(rand.Reader, ecdsaKey, hasher.Sum(nil)); err == nil {
+		curveBits := ecdsaKey.Curve.Params().BitSize
+
+		if m.CurveBits != curveBits {
+			return "", ErrInvalidKey
+		}
+
+		keyBytes := curveBits / 8
+		if curveBits%8 > 0 {
+			keyBytes += 1
+		}
+
+		// We serialize the outpus (r and s) into big-endian byte arrays and pad
+		// them with zeros on the left to make sure the sizes work out. Both arrays
+		// must be keyBytes long, and the output must be 2*keyBytes long.
+		rBytes := r.Bytes()
+		rBytesPadded := make([]byte, keyBytes)
+		copy(rBytesPadded[keyBytes-len(rBytes):], rBytes)
+
+		sBytes := s.Bytes()
+		sBytesPadded := make([]byte, keyBytes)
+		copy(sBytesPadded[keyBytes-len(sBytes):], sBytes)
+
+		out := append(rBytesPadded, sBytesPadded...)
+
+		return EncodeSegment(out), nil
+	} else {
+		return "", err
+	}
+}
--- a/backend/vendor/github.com/dgrijalva/jwt-go/ecdsa_utils.go
+++ b/backend/vendor/github.com/dgrijalva/jwt-go/ecdsa_utils.go
@@ -0,0 +1,67 @@
+package jwt
+
+import (
+	"crypto/ecdsa"
+	"crypto/x509"
+	"encoding/pem"
+	"errors"
+)
+
+var (
+	ErrNotECPublicKey  = errors.New("Key is not a valid ECDSA public key")
+	ErrNotECPrivateKey = errors.New("Key is not a valid ECDSA private key")
+)
+
+// Parse PEM encoded Elliptic Curve Private Key Structure
+func ParseECPrivateKeyFromPEM(key []byte) (*ecdsa.PrivateKey, error) {
+	var err error
+
+	// Parse PEM block
+	var block *pem.Block
+	if block, _ = pem.Decode(key); block == nil {
+		return nil, ErrKeyMustBePEMEncoded
+	}
+
+	// Parse the key
+	var parsedKey interface{}
+	if parsedKey, err = x509.ParseECPrivateKey(block.Bytes); err != nil {
+		return nil, err
+	}
+
+	var pkey *ecdsa.PrivateKey
+	var ok bool
+	if pkey, ok = parsedKey.(*ecdsa.PrivateKey); !ok {
+		return nil, ErrNotECPrivateKey
+	}
+
+	return pkey, nil
+}
+
+// Parse PEM encoded PKCS1 or PKCS8 public key
+func ParseECPublicKeyFromPEM(key []byte) (*ecdsa.PublicKey, error) {
+	var err error
+
+	// Parse PEM block
+	var block *pem.Block
+	if block, _ = pem.Decode(key); block == nil {
+		return nil, ErrKeyMustBePEMEncoded
+	}
+
+	// Parse the key
+	var parsedKey interface{}
+	if parsedKey, err = x509.ParsePKIXPublicKey(block.Bytes); err != nil {
+		if cert, err := x509.ParseCertificate(block.Bytes); err == nil {
+			parsedKey = cert.PublicKey
+		} else {
+			return nil, err
+		}
+	}
+
+	var pkey *ecdsa.PublicKey
+	var ok bool
+	if pkey, ok = parsedKey.(*ecdsa.PublicKey); !ok {
+		return nil, ErrNotECPublicKey
+	}
+
+	return pkey, nil
+}
--- a/backend/vendor/github.com/dgrijalva/jwt-go/errors.go
+++ b/backend/vendor/github.com/dgrijalva/jwt-go/errors.go
@@ -0,0 +1,59 @@
+package jwt
+
+import (
+	"errors"
+)
+
+// Error constants
+var (
+	ErrInvalidKey      = errors.New("key is invalid")
+	ErrInvalidKeyType  = errors.New("key is of invalid type")
+	ErrHashUnavailable = errors.New("the requested hash function is unavailable")
+)
+
+// The errors that might occur when parsing and validating a token
+const (
+	ValidationErrorMalformed        uint32 = 1 << iota // Token is malformed
+	ValidationErrorUnverifiable                        // Token could not be verified because of signing problems
+	ValidationErrorSignatureInvalid                    // Signature validation failed
+
+	// Standard Claim validation errors
+	ValidationErrorAudience      // AUD validation failed
+	ValidationErrorExpired       // EXP validation failed
+	ValidationErrorIssuedAt      // IAT validation failed
+	ValidationErrorIssuer        // ISS validation failed
+	ValidationErrorNotValidYet   // NBF validation failed
+	ValidationErrorId            // JTI validation failed
+	ValidationErrorClaimsInvalid // Generic claims validation error
+)
+
+// Helper for constructing a ValidationError with a string error message
+func NewValidationError(errorText string, errorFlags uint32) *ValidationError {
+	return &ValidationError{
+		text:   errorText,
+		Errors: errorFlags,
+	}
+}
+
+// The error from Parse if token is not valid
+type ValidationError struct {
+	Inner  error  // stores the error returned by external dependencies, i.e.: KeyFunc
+	Errors uint32 // bitfield.  see ValidationError... constants
+	text   string // errors that do not have a valid error just have text
+}
+
+// Validation error is an error type
+func (e ValidationError) Error() string {
+	if e.Inner != nil {
+		return e.Inner.Error()
+	} else if e.text != "" {
+		return e.text
+	} else {
+		return "token is invalid"
+	}
+}
+
+// No errors
+func (e *ValidationError) valid() bool {
+	return e.Errors == 0
+}
--- a/backend/vendor/github.com/dgrijalva/jwt-go/hmac.go
+++ b/backend/vendor/github.com/dgrijalva/jwt-go/hmac.go
@@ -0,0 +1,95 @@
+package jwt
+
+import (
+	"crypto"
+	"crypto/hmac"
+	"errors"
+)
+
+// Implements the HMAC-SHA family of signing methods signing methods
+// Expects key type of []byte for both signing and validation
+type SigningMethodHMAC struct {
+	Name string
+	Hash crypto.Hash
+}
+
+// Specific instances for HS256 and company
+var (
+	SigningMethodHS256  *SigningMethodHMAC
+	SigningMethodHS384  *SigningMethodHMAC
+	SigningMethodHS512  *SigningMethodHMAC
+	ErrSignatureInvalid = errors.New("signature is invalid")
+)
+
+func init() {
+	// HS256
+	SigningMethodHS256 = &SigningMethodHMAC{"HS256", crypto.SHA256}
+	RegisterSigningMethod(SigningMethodHS256.Alg(), func() SigningMethod {
+		return SigningMethodHS256
+	})
+
+	// HS384
+	SigningMethodHS384 = &SigningMethodHMAC{"HS384", crypto.SHA384}
+	RegisterSigningMethod(SigningMethodHS384.Alg(), func() SigningMethod {
+		return SigningMethodHS384
+	})
+
+	// HS512
+	SigningMethodHS512 = &SigningMethodHMAC{"HS512", crypto.SHA512}
+	RegisterSigningMethod(SigningMethodHS512.Alg(), func() SigningMethod {
+		return SigningMethodHS512
+	})
+}
+
+func (m *SigningMethodHMAC) Alg() string {
+	return m.Name
+}
+
+// Verify the signature of HSXXX tokens.  Returns nil if the signature is valid.
+func (m *SigningMethodHMAC) Verify(signingString, signature string, key interface{}) error {
+	// Verify the key is the right type
+	keyBytes, ok := key.([]byte)
+	if !ok {
+		return ErrInvalidKeyType
+	}
+
+	// Decode signature, for comparison
+	sig, err := DecodeSegment(signature)
+	if err != nil {
+		return err
+	}
+
+	// Can we use the specified hashing method?
+	if !m.Hash.Available() {
+		return ErrHashUnavailable
+	}
+
+	// This signing method is symmetric, so we validate the signature
+	// by reproducing the signature from the signing string and key, then
+	// comparing that against the provided signature.
+	hasher := hmac.New(m.Hash.New, keyBytes)
+	hasher.Write([]byte(signingString))
+	if !hmac.Equal(sig, hasher.Sum(nil)) {
+		return ErrSignatureInvalid
+	}
+
+	// No validation errors.  Signature is good.
+	return nil
+}
+
+// Implements the Sign method from SigningMethod for this signing method.
+// Key must be []byte
+func (m *SigningMethodHMAC) Sign(signingString string, key interface{}) (string, error) {
+	if keyBytes, ok := key.([]byte); ok {
+		if !m.Hash.Available() {
+			return "", ErrHashUnavailable
+		}
+
+		hasher := hmac.New(m.Hash.New, keyBytes)
+		hasher.Write([]byte(signingString))
+
+		return EncodeSegment(hasher.Sum(nil)), nil
+	}
+
+	return "", ErrInvalidKeyType
+}
--- a/backend/vendor/github.com/dgrijalva/jwt-go/map_claims.go
+++ b/backend/vendor/github.com/dgrijalva/jwt-go/map_claims.go
@@ -0,0 +1,94 @@
+package jwt
+
+import (
+	"encoding/json"
+	"errors"
+	// "fmt"
+)
+
+// Claims type that uses the map[string]interface{} for JSON decoding
+// This is the default claims type if you don't supply one
+type MapClaims map[string]interface{}
+
+// Compares the aud claim against cmp.
+// If required is false, this method will return true if the value matches or is unset
+func (m MapClaims) VerifyAudience(cmp string, req bool) bool {
+	aud, _ := m["aud"].(string)
+	return verifyAud(aud, cmp, req)
+}
+
+// Compares the exp claim against cmp.
+// If required is false, this method will return true if the value matches or is unset
+func (m MapClaims) VerifyExpiresAt(cmp int64, req bool) bool {
+	switch exp := m["exp"].(type) {
+	case float64:
+		return verifyExp(int64(exp), cmp, req)
+	case json.Number:
+		v, _ := exp.Int64()
+		return verifyExp(v, cmp, req)
+	}
+	return req == false
+}
+
+// Compares the iat claim against cmp.
+// If required is false, this method will return true if the value matches or is unset
+func (m MapClaims) VerifyIssuedAt(cmp int64, req bool) bool {
+	switch iat := m["iat"].(type) {
+	case float64:
+		return verifyIat(int64(iat), cmp, req)
+	case json.Number:
+		v, _ := iat.Int64()
+		return verifyIat(v, cmp, req)
+	}
+	return req == false
+}
+
+// Compares the iss claim against cmp.
+// If required is false, this method will return true if the value matches or is unset
+func (m MapClaims) VerifyIssuer(cmp string, req bool) bool {
+	iss, _ := m["iss"].(string)
+	return verifyIss(iss, cmp, req)
+}
+
+// Compares the nbf claim against cmp.
+// If required is false, this method will return true if the value matches or is unset
+func (m MapClaims) VerifyNotBefore(cmp int64, req bool) bool {
+	switch nbf := m["nbf"].(type) {
+	case float64:
+		return verifyNbf(int64(nbf), cmp, req)
+	case json.Number:
+		v, _ := nbf.Int64()
+		return verifyNbf(v, cmp, req)
+	}
+	return req == false
+}
+
+// Validates time based claims "exp, iat, nbf".
+// There is no accounting for clock skew.
+// As well, if any of the above claims are not in the token, it will still
+// be considered a valid claim.
+func (m MapClaims) Valid() error {
+	vErr := new(ValidationError)
+	now := TimeFunc().Unix()
+
+	if m.VerifyExpiresAt(now, false) == false {
+		vErr.Inner = errors.New("Token is expired")
+		vErr.Errors |= ValidationErrorExpired
+	}
+
+	if m.VerifyIssuedAt(now, false) == false {
+		vErr.Inner = errors.New("Token used before issued")
+		vErr.Errors |= ValidationErrorIssuedAt
+	}
+
+	if m.VerifyNotBefore(now, false) == false {
+		vErr.Inner = errors.New("Token is not valid yet")
+		vErr.Errors |= ValidationErrorNotValidYet
+	}
+
+	if vErr.valid() {
+		return nil
+	}
+
+	return vErr
+}
--- a/backend/vendor/github.com/dgrijalva/jwt-go/none.go
+++ b/backend/vendor/github.com/dgrijalva/jwt-go/none.go
@@ -0,0 +1,52 @@
+package jwt
+
+// Implements the none signing method.  This is required by the spec
+// but you probably should never use it.
+var SigningMethodNone *signingMethodNone
+
+const UnsafeAllowNoneSignatureType unsafeNoneMagicConstant = "none signing method allowed"
+
+var NoneSignatureTypeDisallowedError error
+
+type signingMethodNone struct{}
+type unsafeNoneMagicConstant string
+
+func init() {
+	SigningMethodNone = &signingMethodNone{}
+	NoneSignatureTypeDisallowedError = NewValidationError("'none' signature type is not allowed", ValidationErrorSignatureInvalid)
+
+	RegisterSigningMethod(SigningMethodNone.Alg(), func() SigningMethod {
+		return SigningMethodNone
+	})
+}
+
+func (m *signingMethodNone) Alg() string {
+	return "none"
+}
+
+// Only allow 'none' alg type if UnsafeAllowNoneSignatureType is specified as the key
+func (m *signingMethodNone) Verify(signingString, signature string, key interface{}) (err error) {
+	// Key must be UnsafeAllowNoneSignatureType to prevent accidentally
+	// accepting 'none' signing method
+	if _, ok := key.(unsafeNoneMagicConstant); !ok {
+		return NoneSignatureTypeDisallowedError
+	}
+	// If signing method is none, signature must be an empty string
+	if signature != "" {
+		return NewValidationError(
+			"'none' signing method with non-empty signature",
+			ValidationErrorSignatureInvalid,
+		)
+	}
+
+	// Accept 'none' signing method.
+	return nil
+}
+
+// Only allow 'none' signing if UnsafeAllowNoneSignatureType is specified as the key
+func (m *signingMethodNone) Sign(signingString string, key interface{}) (string, error) {
+	if _, ok := key.(unsafeNoneMagicConstant); ok {
+		return "", nil
+	}
+	return "", NoneSignatureTypeDisallowedError
+}
--- a/backend/vendor/github.com/dgrijalva/jwt-go/parser.go
+++ b/backend/vendor/github.com/dgrijalva/jwt-go/parser.go
@@ -0,0 +1,148 @@
+package jwt
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"strings"
+)
+
+type Parser struct {
+	ValidMethods         []string // If populated, only these methods will be considered valid
+	UseJSONNumber        bool     // Use JSON Number format in JSON decoder
+	SkipClaimsValidation bool     // Skip claims validation during token parsing
+}
+
+// Parse, validate, and return a token.
+// keyFunc will receive the parsed token and should return the key for validating.
+// If everything is kosher, err will be nil
+func (p *Parser) Parse(tokenString string, keyFunc Keyfunc) (*Token, error) {
+	return p.ParseWithClaims(tokenString, MapClaims{}, keyFunc)
+}
+
+func (p *Parser) ParseWithClaims(tokenString string, claims Claims, keyFunc Keyfunc) (*Token, error) {
+	token, parts, err := p.ParseUnverified(tokenString, claims)
+	if err != nil {
+		return token, err
+	}
+
+	// Verify signing method is in the required set
+	if p.ValidMethods != nil {
+		var signingMethodValid = false
+		var alg = token.Method.Alg()
+		for _, m := range p.ValidMethods {
+			if m == alg {
+				signingMethodValid = true
+				break
+			}
+		}
+		if !signingMethodValid {
+			// signing method is not in the listed set
+			return token, NewValidationError(fmt.Sprintf("signing method %v is invalid", alg), ValidationErrorSignatureInvalid)
+		}
+	}
+
+	// Lookup key
+	var key interface{}
+	if keyFunc == nil {
+		// keyFunc was not provided.  short circuiting validation
+		return token, NewValidationError("no Keyfunc was provided.", ValidationErrorUnverifiable)
+	}
+	if key, err = keyFunc(token); err != nil {
+		// keyFunc returned an error
+		if ve, ok := err.(*ValidationError); ok {
+			return token, ve
+		}
+		return token, &ValidationError{Inner: err, Errors: ValidationErrorUnverifiable}
+	}
+
+	vErr := &ValidationError{}
+
+	// Validate Claims
+	if !p.SkipClaimsValidation {
+		if err := token.Claims.Valid(); err != nil {
+
+			// If the Claims Valid returned an error, check if it is a validation error,
+			// If it was another error type, create a ValidationError with a generic ClaimsInvalid flag set
+			if e, ok := err.(*ValidationError); !ok {
+				vErr = &ValidationError{Inner: err, Errors: ValidationErrorClaimsInvalid}
+			} else {
+				vErr = e
+			}
+		}
+	}
+
+	// Perform validation
+	token.Signature = parts[2]
+	if err = token.Method.Verify(strings.Join(parts[0:2], "."), token.Signature, key); err != nil {
+		vErr.Inner = err
+		vErr.Errors |= ValidationErrorSignatureInvalid
+	}
+
+	if vErr.valid() {
+		token.Valid = true
+		return token, nil
+	}
+
+	return token, vErr
+}
+
+// WARNING: Don't use this method unless you know what you're doing
+//
+// This method parses the token but doesn't validate the signature. It's only
+// ever useful in cases where you know the signature is valid (because it has
+// been checked previously in the stack) and you want to extract values from
+// it.
+func (p *Parser) ParseUnverified(tokenString string, claims Claims) (token *Token, parts []string, err error) {
+	parts = strings.Split(tokenString, ".")
+	if len(parts) != 3 {
+		return nil, parts, NewValidationError("token contains an invalid number of segments", ValidationErrorMalformed)
+	}
+
+	token = &Token{Raw: tokenString}
+
+	// parse Header
+	var headerBytes []byte
+	if headerBytes, err = DecodeSegment(parts[0]); err != nil {
+		if strings.HasPrefix(strings.ToLower(tokenString), "bearer ") {
+			return token, parts, NewValidationError("tokenstring should not contain 'bearer '", ValidationErrorMalformed)
+		}
+		return token, parts, &ValidationError{Inner: err, Errors: ValidationErrorMalformed}
+	}
+	if err = json.Unmarshal(headerBytes, &token.Header); err != nil {
+		return token, parts, &ValidationError{Inner: err, Errors: ValidationErrorMalformed}
+	}
+
+	// parse Claims
+	var claimBytes []byte
+	token.Claims = claims
+
+	if claimBytes, err = DecodeSegment(parts[1]); err != nil {
+		return token, parts, &ValidationError{Inner: err, Errors: ValidationErrorMalformed}
+	}
+	dec := json.NewDecoder(bytes.NewBuffer(claimBytes))
+	if p.UseJSONNumber {
+		dec.UseNumber()
+	}
+	// JSON Decode.  Special case for map type to avoid weird pointer behavior
+	if c, ok := token.Claims.(MapClaims); ok {
+		err = dec.Decode(&c)
+	} else {
+		err = dec.Decode(&claims)
+	}
+	// Handle decode error
+	if err != nil {
+		return token, parts, &ValidationError{Inner: err, Errors: ValidationErrorMalformed}
+	}
+
+	// Lookup signature method
+	if method, ok := token.Header["alg"].(string); ok {
+		if token.Method = GetSigningMethod(method); token.Method == nil {
+			return token, parts, NewValidationError("signing method (alg) is unavailable.", ValidationErrorUnverifiable)
+		}
+	} else {
+		return token, parts, NewValidationError("signing method (alg) is unspecified.", ValidationErrorUnverifiable)
+	}
+
+	return token, parts, nil
+}
--- a/backend/vendor/github.com/dgrijalva/jwt-go/rsa.go
+++ b/backend/vendor/github.com/dgrijalva/jwt-go/rsa.go
@@ -0,0 +1,101 @@
+package jwt
+
+import (
+	"crypto"
+	"crypto/rand"
+	"crypto/rsa"
+)
+
+// Implements the RSA family of signing methods signing methods
+// Expects *rsa.PrivateKey for signing and *rsa.PublicKey for validation
+type SigningMethodRSA struct {
+	Name string
+	Hash crypto.Hash
+}
+
+// Specific instances for RS256 and company
+var (
+	SigningMethodRS256 *SigningMethodRSA
+	SigningMethodRS384 *SigningMethodRSA
+	SigningMethodRS512 *SigningMethodRSA
+)
+
+func init() {
+	// RS256
+	SigningMethodRS256 = &SigningMethodRSA{"RS256", crypto.SHA256}
+	RegisterSigningMethod(SigningMethodRS256.Alg(), func() SigningMethod {
+		return SigningMethodRS256
+	})
+
+	// RS384
+	SigningMethodRS384 = &SigningMethodRSA{"RS384", crypto.SHA384}
+	RegisterSigningMethod(SigningMethodRS384.Alg(), func() SigningMethod {
+		return SigningMethodRS384
+	})
+
+	// RS512
+	SigningMethodRS512 = &SigningMethodRSA{"RS512", crypto.SHA512}
+	RegisterSigningMethod(SigningMethodRS512.Alg(), func() SigningMethod {
+		return SigningMethodRS512
+	})
+}
+
+func (m *SigningMethodRSA) Alg() string {
+	return m.Name
+}
+
+// Implements the Verify method from SigningMethod
+// For this signing method, must be an *rsa.PublicKey structure.
+func (m *SigningMethodRSA) Verify(signingString, signature string, key interface{}) error {
+	var err error
+
+	// Decode the signature
+	var sig []byte
+	if sig, err = DecodeSegment(signature); err != nil {
+		return err
+	}
+
+	var rsaKey *rsa.PublicKey
+	var ok bool
+
+	if rsaKey, ok = key.(*rsa.PublicKey); !ok {
+		return ErrInvalidKeyType
+	}
+
+	// Create hasher
+	if !m.Hash.Available() {
+		return ErrHashUnavailable
+	}
+	hasher := m.Hash.New()
+	hasher.Write([]byte(signingString))
+
+	// Verify the signature
+	return rsa.VerifyPKCS1v15(rsaKey, m.Hash, hasher.Sum(nil), sig)
+}
+
+// Implements the Sign method from SigningMethod
+// For this signing method, must be an *rsa.PrivateKey structure.
+func (m *SigningMethodRSA) Sign(signingString string, key interface{}) (string, error) {
+	var rsaKey *rsa.PrivateKey
+	var ok bool
+
+	// Validate type of key
+	if rsaKey, ok = key.(*rsa.PrivateKey); !ok {
+		return "", ErrInvalidKey
+	}
+
+	// Create the hasher
+	if !m.Hash.Available() {
+		return "", ErrHashUnavailable
+	}
+
+	hasher := m.Hash.New()
+	hasher.Write([]byte(signingString))
+
+	// Sign the string and return the encoded bytes
+	if sigBytes, err := rsa.SignPKCS1v15(rand.Reader, rsaKey, m.Hash, hasher.Sum(nil)); err == nil {
+		return EncodeSegment(sigBytes), nil
+	} else {
+		return "", err
+	}
+}
--- a/backend/vendor/github.com/dgrijalva/jwt-go/rsa_pss.go
+++ b/backend/vendor/github.com/dgrijalva/jwt-go/rsa_pss.go
@@ -0,0 +1,126 @@
+// +build go1.4
+
+package jwt
+
+import (
+	"crypto"
+	"crypto/rand"
+	"crypto/rsa"
+)
+
+// Implements the RSAPSS family of signing methods signing methods
+type SigningMethodRSAPSS struct {
+	*SigningMethodRSA
+	Options *rsa.PSSOptions
+}
+
+// Specific instances for RS/PS and company
+var (
+	SigningMethodPS256 *SigningMethodRSAPSS
+	SigningMethodPS384 *SigningMethodRSAPSS
+	SigningMethodPS512 *SigningMethodRSAPSS
+)
+
+func init() {
+	// PS256
+	SigningMethodPS256 = &SigningMethodRSAPSS{
+		&SigningMethodRSA{
+			Name: "PS256",
+			Hash: crypto.SHA256,
+		},
+		&rsa.PSSOptions{
+			SaltLength: rsa.PSSSaltLengthAuto,
+			Hash:       crypto.SHA256,
+		},
+	}
+	RegisterSigningMethod(SigningMethodPS256.Alg(), func() SigningMethod {
+		return SigningMethodPS256
+	})
+
+	// PS384
+	SigningMethodPS384 = &SigningMethodRSAPSS{
+		&SigningMethodRSA{
+			Name: "PS384",
+			Hash: crypto.SHA384,
+		},
+		&rsa.PSSOptions{
+			SaltLength: rsa.PSSSaltLengthAuto,
+			Hash:       crypto.SHA384,
+		},
+	}
+	RegisterSigningMethod(SigningMethodPS384.Alg(), func() SigningMethod {
+		return SigningMethodPS384
+	})
+
+	// PS512
+	SigningMethodPS512 = &SigningMethodRSAPSS{
+		&SigningMethodRSA{
+			Name: "PS512",
+			Hash: crypto.SHA512,
+		},
+		&rsa.PSSOptions{
+			SaltLength: rsa.PSSSaltLengthAuto,
+			Hash:       crypto.SHA512,
+		},
+	}
+	RegisterSigningMethod(SigningMethodPS512.Alg(), func() SigningMethod {
+		return SigningMethodPS512
+	})
+}
+
+// Implements the Verify method from SigningMethod
+// For this verify method, key must be an rsa.PublicKey struct
+func (m *SigningMethodRSAPSS) Verify(signingString, signature string, key interface{}) error {
+	var err error
+
+	// Decode the signature
+	var sig []byte
+	if sig, err = DecodeSegment(signature); err != nil {
+		return err
+	}
+
+	var rsaKey *rsa.PublicKey
+	switch k := key.(type) {
+	case *rsa.PublicKey:
+		rsaKey = k
+	default:
+		return ErrInvalidKey
+	}
+
+	// Create hasher
+	if !m.Hash.Available() {
+		return ErrHashUnavailable
+	}
+	hasher := m.Hash.New()
+	hasher.Write([]byte(signingString))
+
+	return rsa.VerifyPSS(rsaKey, m.Hash, hasher.Sum(nil), sig, m.Options)
+}
+
+// Implements the Sign method from SigningMethod
+// For this signing method, key must be an rsa.PrivateKey struct
+func (m *SigningMethodRSAPSS) Sign(signingString string, key interface{}) (string, error) {
+	var rsaKey *rsa.PrivateKey
+
+	switch k := key.(type) {
+	case *rsa.PrivateKey:
+		rsaKey = k
+	default:
+		return "", ErrInvalidKeyType
+	}
+
+	// Create the hasher
+	if !m.Hash.Available() {
+		return "", ErrHashUnavailable
+	}
+
+	hasher := m.Hash.New()
+	hasher.Write([]byte(signingString))
+
+	// Sign the string and return the encoded bytes
+	if sigBytes, err := rsa.SignPSS(rand.Reader, rsaKey, m.Hash, hasher.Sum(nil), m.Options); err == nil {
+		return EncodeSegment(sigBytes), nil
+	} else {
+		return "", err
+	}
+}
--- a/backend/vendor/github.com/dgrijalva/jwt-go/rsa_utils.go
+++ b/backend/vendor/github.com/dgrijalva/jwt-go/rsa_utils.go
@@ -0,0 +1,101 @@
+package jwt
+
+import (
+	"crypto/rsa"
+	"crypto/x509"
+	"encoding/pem"
+	"errors"
+)
+
+var (
+	ErrKeyMustBePEMEncoded = errors.New("Invalid Key: Key must be PEM encoded PKCS1 or PKCS8 private key")
+	ErrNotRSAPrivateKey    = errors.New("Key is not a valid RSA private key")
+	ErrNotRSAPublicKey     = errors.New("Key is not a valid RSA public key")
+)
+
+// Parse PEM encoded PKCS1 or PKCS8 private key
+func ParseRSAPrivateKeyFromPEM(key []byte) (*rsa.PrivateKey, error) {
+	var err error
+
+	// Parse PEM block
+	var block *pem.Block
+	if block, _ = pem.Decode(key); block == nil {
+		return nil, ErrKeyMustBePEMEncoded
+	}
+
+	var parsedKey interface{}
+	if parsedKey, err = x509.ParsePKCS1PrivateKey(block.Bytes); err != nil {
+		if parsedKey, err = x509.ParsePKCS8PrivateKey(block.Bytes); err != nil {
+			return nil, err
+		}
+	}
+
+	var pkey *rsa.PrivateKey
+	var ok bool
+	if pkey, ok = parsedKey.(*rsa.PrivateKey); !ok {
+		return nil, ErrNotRSAPrivateKey
+	}
+
+	return pkey, nil
+}
+
+// Parse PEM encoded PKCS1 or PKCS8 private key protected with password
+func ParseRSAPrivateKeyFromPEMWithPassword(key []byte, password string) (*rsa.PrivateKey, error) {
+	var err error
+
+	// Parse PEM block
+	var block *pem.Block
+	if block, _ = pem.Decode(key); block == nil {
+		return nil, ErrKeyMustBePEMEncoded
+	}
+
+	var parsedKey interface{}
+
+	var blockDecrypted []byte
+	if blockDecrypted, err = x509.DecryptPEMBlock(block, []byte(password)); err != nil {
+		return nil, err
+	}
+
+	if parsedKey, err = x509.ParsePKCS1PrivateKey(blockDecrypted); err != nil {
+		if parsedKey, err = x509.ParsePKCS8PrivateKey(blockDecrypted); err != nil {
+			return nil, err
+		}
+	}
+
+	var pkey *rsa.PrivateKey
+	var ok bool
+	if pkey, ok = parsedKey.(*rsa.PrivateKey); !ok {
+		return nil, ErrNotRSAPrivateKey
+	}
+
+	return pkey, nil
+}
+
+// Parse PEM encoded PKCS1 or PKCS8 public key
+func ParseRSAPublicKeyFromPEM(key []byte) (*rsa.PublicKey, error) {
+	var err error
+
+	// Parse PEM block
+	var block *pem.Block
+	if block, _ = pem.Decode(key); block == nil {
+		return nil, ErrKeyMustBePEMEncoded
+	}
+
+	// Parse the key
+	var parsedKey interface{}
+	if parsedKey, err = x509.ParsePKIXPublicKey(block.Bytes); err != nil {
+		if cert, err := x509.ParseCertificate(block.Bytes); err == nil {
+			parsedKey = cert.PublicKey
+		} else {
+			return nil, err
+		}
+	}
+
+	var pkey *rsa.PublicKey
+	var ok bool
+	if pkey, ok = parsedKey.(*rsa.PublicKey); !ok {
+		return nil, ErrNotRSAPublicKey
+	}
+
+	return pkey, nil
+}
--- a/backend/vendor/github.com/dgrijalva/jwt-go/signing_method.go
+++ b/backend/vendor/github.com/dgrijalva/jwt-go/signing_method.go
@@ -0,0 +1,35 @@
+package jwt
+
+import (
+	"sync"
+)
+
+var signingMethods = map[string]func() SigningMethod{}
+var signingMethodLock = new(sync.RWMutex)
+
+// Implement SigningMethod to add new methods for signing or verifying tokens.
+type SigningMethod interface {
+	Verify(signingString, signature string, key interface{}) error // Returns nil if signature is valid
+	Sign(signingString string, key interface{}) (string, error)    // Returns encoded signature or error
+	Alg() string                                                   // returns the alg identifier for this method (example: 'HS256')
+}
+
+// Register the "alg" name and a factory function for signing method.
+// This is typically done during init() in the method's implementation
+func RegisterSigningMethod(alg string, f func() SigningMethod) {
+	signingMethodLock.Lock()
+	defer signingMethodLock.Unlock()
+
+	signingMethods[alg] = f
+}
+
+// Get a signing method from an "alg" string
+func GetSigningMethod(alg string) (method SigningMethod) {
+	signingMethodLock.RLock()
+	defer signingMethodLock.RUnlock()
+
+	if methodF, ok := signingMethods[alg]; ok {
+		method = methodF()
+	}
+	return
+}
--- a/backend/vendor/github.com/dgrijalva/jwt-go/token.go
+++ b/backend/vendor/github.com/dgrijalva/jwt-go/token.go
@@ -0,0 +1,108 @@
+package jwt
+
+import (
+	"encoding/base64"
+	"encoding/json"
+	"strings"
+	"time"
+)
+
+// TimeFunc provides the current time when parsing token to validate "exp" claim (expiration time).
+// You can override it to use another time value.  This is useful for testing or if your
+// server uses a different time zone than your tokens.
+var TimeFunc = time.Now
+
+// Parse methods use this callback function to supply
+// the key for verification.  The function receives the parsed,
+// but unverified Token.  This allows you to use properties in the
+// Header of the token (such as `kid`) to identify which key to use.
+type Keyfunc func(*Token) (interface{}, error)
+
+// A JWT Token.  Different fields will be used depending on whether you're
+// creating or parsing/verifying a token.
+type Token struct {
+	Raw       string                 // The raw token.  Populated when you Parse a token
+	Method    SigningMethod          // The signing method used or to be used
+	Header    map[string]interface{} // The first segment of the token
+	Claims    Claims                 // The second segment of the token
+	Signature string                 // The third segment of the token.  Populated when you Parse a token
+	Valid     bool                   // Is the token valid?  Populated when you Parse/Verify a token
+}
+
+// Create a new Token.  Takes a signing method
+func New(method SigningMethod) *Token {
+	return NewWithClaims(method, MapClaims{})
+}
+
+func NewWithClaims(method SigningMethod, claims Claims) *Token {
+	return &Token{
+		Header: map[string]interface{}{
+			"typ": "JWT",
+			"alg": method.Alg(),
+		},
+		Claims: claims,
+		Method: method,
+	}
+}
+
+// Get the complete, signed token
+func (t *Token) SignedString(key interface{}) (string, error) {
+	var sig, sstr string
+	var err error
+	if sstr, err = t.SigningString(); err != nil {
+		return "", err
+	}
+	if sig, err = t.Method.Sign(sstr, key); err != nil {
+		return "", err
+	}
+	return strings.Join([]string{sstr, sig}, "."), nil
+}
+
+// Generate the signing string.  This is the
+// most expensive part of the whole deal.  Unless you
+// need this for something special, just go straight for
+// the SignedString.
+func (t *Token) SigningString() (string, error) {
+	var err error
+	parts := make([]string, 2)
+	for i, _ := range parts {
+		var jsonValue []byte
+		if i == 0 {
+			if jsonValue, err = json.Marshal(t.Header); err != nil {
+				return "", err
+			}
+		} else {
+			if jsonValue, err = json.Marshal(t.Claims); err != nil {
+				return "", err
+			}
+		}
+
+		parts[i] = EncodeSegment(jsonValue)
+	}
+	return strings.Join(parts, "."), nil
+}
+
+// Parse, validate, and return a token.
+// keyFunc will receive the parsed token and should return the key for validating.
+// If everything is kosher, err will be nil
+func Parse(tokenString string, keyFunc Keyfunc) (*Token, error) {
+	return new(Parser).Parse(tokenString, keyFunc)
+}
+
+func ParseWithClaims(tokenString string, claims Claims, keyFunc Keyfunc) (*Token, error) {
+	return new(Parser).ParseWithClaims(tokenString, claims, keyFunc)
+}
+
+// Encode JWT specific base64url encoding with padding stripped
+func EncodeSegment(seg []byte) string {
+	return strings.TrimRight(base64.URLEncoding.EncodeToString(seg), "=")
+}
+
+// Decode JWT specific base64url encoding with padding stripped
+func DecodeSegment(seg string) ([]byte, error) {
+	if l := len(seg) % 4; l > 0 {
+		seg += strings.Repeat("=", 4-l)
+	}
+
+	return base64.URLEncoding.DecodeString(seg)
+}
--- a/backend/vendor/github.com/mitchellh/mapstructure/go.mod
+++ b/backend/vendor/github.com/mitchellh/mapstructure/go.mod
@@ -1,3 +1 @@
 module github.com/mitchellh/mapstructure
-
-go 1.12
--- a/backend/vendor/github.com/robfig/cron/.gitignore
+++ b/backend/vendor/github.com/robfig/cron/.gitignore
@@ -1,22 +0,0 @@
-# Compiled Object files, Static and Dynamic libs (Shared Objects)
-*.o
-*.a
-*.so
-
-# Folders
-_obj
-_test
-
-# Architecture specific extensions/prefixes
-*.[568vq]
-[568vq].out
-
-*.cgo1.go
-*.cgo2.c
-_cgo_defun.c
-_cgo_gotypes.go
-_cgo_export.*
-
-_testmain.go
-
-*.exe
--- a/backend/vendor/github.com/robfig/cron/.travis.yml
+++ b/backend/vendor/github.com/robfig/cron/.travis.yml
@@ -1 +0,0 @@
-language: go
--- a/backend/vendor/github.com/robfig/cron/LICENSE
+++ b/backend/vendor/github.com/robfig/cron/LICENSE
@@ -1,21 +0,0 @@
-Copyright (C) 2012 Rob Figueiredo
-All Rights Reserved.
-
-MIT LICENSE
-
-Permission is hereby granted, free of charge, to any person obtaining a copy of
-this software and associated documentation files (the "Software"), to deal in
-the Software without restriction, including without limitation the rights to
-use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
-the Software, and to permit persons to whom the Software is furnished to do so,
-subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
-FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
-COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
-IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
-CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
--- a/backend/vendor/github.com/robfig/cron/README.md
+++ b/backend/vendor/github.com/robfig/cron/README.md
@@ -1,6 +0,0 @@
-[![GoDoc](http://godoc.org/github.com/robfig/cron?status.png)](http://godoc.org/github.com/robfig/cron) 
-[![Build Status](https://travis-ci.org/robfig/cron.svg?branch=master)](https://travis-ci.org/robfig/cron)
-
-# cron
-
-Documentation here: https://godoc.org/github.com/robfig/cron
--- a/backend/vendor/github.com/robfig/cron/constantdelay.go
+++ b/backend/vendor/github.com/robfig/cron/constantdelay.go
@@ -1,27 +0,0 @@
-package cron
-
-import "time"
-
-// ConstantDelaySchedule represents a simple recurring duty cycle, e.g. "Every 5 minutes".
-// It does not support jobs more frequent than once a second.
-type ConstantDelaySchedule struct {
-	Delay time.Duration
-}
-
-// Every returns a crontab Schedule that activates once every duration.
-// Delays of less than a second are not supported (will round up to 1 second).
-// Any fields less than a Second are truncated.
-func Every(duration time.Duration) ConstantDelaySchedule {
-	if duration < time.Second {
-		duration = time.Second
-	}
-	return ConstantDelaySchedule{
-		Delay: duration - time.Duration(duration.Nanoseconds())%time.Second,
-	}
-}
-
-// Next returns the next time this should be run.
-// This rounds so that the next activation time will be on the second.
-func (schedule ConstantDelaySchedule) Next(t time.Time) time.Time {
-	return t.Add(schedule.Delay - time.Duration(t.Nanosecond())*time.Nanosecond)
-}
--- a/backend/vendor/github.com/robfig/cron/cron.go
+++ b/backend/vendor/github.com/robfig/cron/cron.go
@@ -1,259 +0,0 @@
-package cron
-
-import (
-	"log"
-	"runtime"
-	"sort"
-	"time"
-)
-
-// Cron keeps track of any number of entries, invoking the associated func as
-// specified by the schedule. It may be started, stopped, and the entries may
-// be inspected while running.
-type Cron struct {
-	entries  []*Entry
-	stop     chan struct{}
-	add      chan *Entry
-	snapshot chan []*Entry
-	running  bool
-	ErrorLog *log.Logger
-	location *time.Location
-}
-
-// Job is an interface for submitted cron jobs.
-type Job interface {
-	Run()
-}
-
-// The Schedule describes a job's duty cycle.
-type Schedule interface {
-	// Return the next activation time, later than the given time.
-	// Next is invoked initially, and then each time the job is run.
-	Next(time.Time) time.Time
-}
-
-// Entry consists of a schedule and the func to execute on that schedule.
-type Entry struct {
-	// The schedule on which this job should be run.
-	Schedule Schedule
-
-	// The next time the job will run. This is the zero time if Cron has not been
-	// started or this entry's schedule is unsatisfiable
-	Next time.Time
-
-	// The last time this job was run. This is the zero time if the job has never
-	// been run.
-	Prev time.Time
-
-	// The Job to run.
-	Job Job
-}
-
-// byTime is a wrapper for sorting the entry array by time
-// (with zero time at the end).
-type byTime []*Entry
-
-func (s byTime) Len() int      { return len(s) }
-func (s byTime) Swap(i, j int) { s[i], s[j] = s[j], s[i] }
-func (s byTime) Less(i, j int) bool {
-	// Two zero times should return false.
-	// Otherwise, zero is "greater" than any other time.
-	// (To sort it at the end of the list.)
-	if s[i].Next.IsZero() {
-		return false
-	}
-	if s[j].Next.IsZero() {
-		return true
-	}
-	return s[i].Next.Before(s[j].Next)
-}
-
-// New returns a new Cron job runner, in the Local time zone.
-func New() *Cron {
-	return NewWithLocation(time.Now().Location())
-}
-
-// NewWithLocation returns a new Cron job runner.
-func NewWithLocation(location *time.Location) *Cron {
-	return &Cron{
-		entries:  nil,
-		add:      make(chan *Entry),
-		stop:     make(chan struct{}),
-		snapshot: make(chan []*Entry),
-		running:  false,
-		ErrorLog: nil,
-		location: location,
-	}
-}
-
-// A wrapper that turns a func() into a cron.Job
-type FuncJob func()
-
-func (f FuncJob) Run() { f() }
-
-// AddFunc adds a func to the Cron to be run on the given schedule.
-func (c *Cron) AddFunc(spec string, cmd func()) error {
-	return c.AddJob(spec, FuncJob(cmd))
-}
-
-// AddJob adds a Job to the Cron to be run on the given schedule.
-func (c *Cron) AddJob(spec string, cmd Job) error {
-	schedule, err := Parse(spec)
-	if err != nil {
-		return err
-	}
-	c.Schedule(schedule, cmd)
-	return nil
-}
-
-// Schedule adds a Job to the Cron to be run on the given schedule.
-func (c *Cron) Schedule(schedule Schedule, cmd Job) {
-	entry := &Entry{
-		Schedule: schedule,
-		Job:      cmd,
-	}
-	if !c.running {
-		c.entries = append(c.entries, entry)
-		return
-	}
-
-	c.add <- entry
-}
-
-// Entries returns a snapshot of the cron entries.
-func (c *Cron) Entries() []*Entry {
-	if c.running {
-		c.snapshot <- nil
-		x := <-c.snapshot
-		return x
-	}
-	return c.entrySnapshot()
-}
-
-// Location gets the time zone location
-func (c *Cron) Location() *time.Location {
-	return c.location
-}
-
-// Start the cron scheduler in its own go-routine, or no-op if already started.
-func (c *Cron) Start() {
-	if c.running {
-		return
-	}
-	c.running = true
-	go c.run()
-}
-
-// Run the cron scheduler, or no-op if already running.
-func (c *Cron) Run() {
-	if c.running {
-		return
-	}
-	c.running = true
-	c.run()
-}
-
-func (c *Cron) runWithRecovery(j Job) {
-	defer func() {
-		if r := recover(); r != nil {
-			const size = 64 << 10
-			buf := make([]byte, size)
-			buf = buf[:runtime.Stack(buf, false)]
-			c.logf("cron: panic running job: %v\n%s", r, buf)
-		}
-	}()
-	j.Run()
-}
-
-// Run the scheduler. this is private just due to the need to synchronize
-// access to the 'running' state variable.
-func (c *Cron) run() {
-	// Figure out the next activation times for each entry.
-	now := c.now()
-	for _, entry := range c.entries {
-		entry.Next = entry.Schedule.Next(now)
-	}
-
-	for {
-		// Determine the next entry to run.
-		sort.Sort(byTime(c.entries))
-
-		var timer *time.Timer
-		if len(c.entries) == 0 || c.entries[0].Next.IsZero() {
-			// If there are no entries yet, just sleep - it still handles new entries
-			// and stop requests.
-			timer = time.NewTimer(100000 * time.Hour)
-		} else {
-			timer = time.NewTimer(c.entries[0].Next.Sub(now))
-		}
-
-		for {
-			select {
-			case now = <-timer.C:
-				now = now.In(c.location)
-				// Run every entry whose next time was less than now
-				for _, e := range c.entries {
-					if e.Next.After(now) || e.Next.IsZero() {
-						break
-					}
-					go c.runWithRecovery(e.Job)
-					e.Prev = e.Next
-					e.Next = e.Schedule.Next(now)
-				}
-
-			case newEntry := <-c.add:
-				timer.Stop()
-				now = c.now()
-				newEntry.Next = newEntry.Schedule.Next(now)
-				c.entries = append(c.entries, newEntry)
-
-			case <-c.snapshot:
-				c.snapshot <- c.entrySnapshot()
-				continue
-
-			case <-c.stop:
-				timer.Stop()
-				return
-			}
-
-			break
-		}
-	}
-}
-
-// Logs an error to stderr or to the configured error log
-func (c *Cron) logf(format string, args ...interface{}) {
-	if c.ErrorLog != nil {
-		c.ErrorLog.Printf(format, args...)
-	} else {
-		log.Printf(format, args...)
-	}
-}
-
-// Stop stops the cron scheduler if it is running; otherwise it does nothing.
-func (c *Cron) Stop() {
-	if !c.running {
-		return
-	}
-	c.stop <- struct{}{}
-	c.running = false
-}
-
-// entrySnapshot returns a copy of the current cron entry list.
-func (c *Cron) entrySnapshot() []*Entry {
-	entries := []*Entry{}
-	for _, e := range c.entries {
-		entries = append(entries, &Entry{
-			Schedule: e.Schedule,
-			Next:     e.Next,
-			Prev:     e.Prev,
-			Job:      e.Job,
-		})
-	}
-	return entries
-}
-
-// now returns current time in c location
-func (c *Cron) now() time.Time {
-	return time.Now().In(c.location)
-}
--- a/backend/vendor/github.com/robfig/cron/doc.go
+++ b/backend/vendor/github.com/robfig/cron/doc.go
@@ -1,129 +0,0 @@
-/*
-Package cron implements a cron spec parser and job runner.
-
-Usage
-
-Callers may register Funcs to be invoked on a given schedule.  Cron will run
-them in their own goroutines.
-
-	c := cron.New()
-	c.AddFunc("0 30 * * * *", func() { fmt.Println("Every hour on the half hour") })
-	c.AddFunc("@hourly",      func() { fmt.Println("Every hour") })
-	c.AddFunc("@every 1h30m", func() { fmt.Println("Every hour thirty") })
-	c.Start()
-	..
-	// Funcs are invoked in their own goroutine, asynchronously.
-	...
-	// Funcs may also be added to a running Cron
-	c.AddFunc("@daily", func() { fmt.Println("Every day") })
-	..
-	// Inspect the cron job entries' next and previous run times.
-	inspect(c.Entries())
-	..
-	c.Stop()  // Stop the scheduler (does not stop any jobs already running).
-
-CRON Expression Format
-
-A cron expression represents a set of times, using 6 space-separated fields.
-
-	Field name   | Mandatory? | Allowed values  | Allowed special characters
-	----------   | ---------- | --------------  | --------------------------
-	Seconds      | Yes        | 0-59            | * / , -
-	Minutes      | Yes        | 0-59            | * / , -
-	Hours        | Yes        | 0-23            | * / , -
-	Day of month | Yes        | 1-31            | * / , - ?
-	Month        | Yes        | 1-12 or JAN-DEC | * / , -
-	Day of week  | Yes        | 0-6 or SUN-SAT  | * / , - ?
-
-Note: Month and Day-of-week field values are case insensitive.  "SUN", "Sun",
-and "sun" are equally accepted.
-
-Special Characters
-
-Asterisk ( * )
-
-The asterisk indicates that the cron expression will match for all values of the
-field; e.g., using an asterisk in the 5th field (month) would indicate every
-month.
-
-Slash ( / )
-
-Slashes are used to describe increments of ranges. For example 3-59/15 in the
-1st field (minutes) would indicate the 3rd minute of the hour and every 15
-minutes thereafter. The form "*\/..." is equivalent to the form "first-last/...",
-that is, an increment over the largest possible range of the field.  The form
-"N/..." is accepted as meaning "N-MAX/...", that is, starting at N, use the
-increment until the end of that specific range.  It does not wrap around.
-
-Comma ( , )
-
-Commas are used to separate items of a list. For example, using "MON,WED,FRI" in
-the 5th field (day of week) would mean Mondays, Wednesdays and Fridays.
-
-Hyphen ( - )
-
-Hyphens are used to define ranges. For example, 9-17 would indicate every
-hour between 9am and 5pm inclusive.
-
-Question mark ( ? )
-
-Question mark may be used instead of '*' for leaving either day-of-month or
-day-of-week blank.
-
-Predefined schedules
-
-You may use one of several pre-defined schedules in place of a cron expression.
-
-	Entry                  | Description                                | Equivalent To
-	-----                  | -----------                                | -------------
-	@yearly (or @annually) | Run once a year, midnight, Jan. 1st        | 0 0 0 1 1 *
-	@monthly               | Run once a month, midnight, first of month | 0 0 0 1 * *
-	@weekly                | Run once a week, midnight between Sat/Sun  | 0 0 0 * * 0
-	@daily (or @midnight)  | Run once a day, midnight                   | 0 0 0 * * *
-	@hourly                | Run once an hour, beginning of hour        | 0 0 * * * *
-
-Intervals
-
-You may also schedule a job to execute at fixed intervals, starting at the time it's added 
-or cron is run. This is supported by formatting the cron spec like this:
-
-    @every <duration>
-
-where "duration" is a string accepted by time.ParseDuration
-(http://golang.org/pkg/time/#ParseDuration).
-
-For example, "@every 1h30m10s" would indicate a schedule that activates after
-1 hour, 30 minutes, 10 seconds, and then every interval after that.
-
-Note: The interval does not take the job runtime into account.  For example,
-if a job takes 3 minutes to run, and it is scheduled to run every 5 minutes,
-it will have only 2 minutes of idle time between each run.
-
-Time zones
-
-All interpretation and scheduling is done in the machine's local time zone (as
-provided by the Go time package (http://www.golang.org/pkg/time).
-
-Be aware that jobs scheduled during daylight-savings leap-ahead transitions will
-not be run!
-
-Thread safety
-
-Since the Cron service runs concurrently with the calling code, some amount of
-care must be taken to ensure proper synchronization.
-
-All cron methods are designed to be correctly synchronized as long as the caller
-ensures that invocations have a clear happens-before ordering between them.
-
-Implementation
-
-Cron entries are stored in an array, sorted by their next activation time.  Cron
-sleeps until the next job is due to be run.
-
-Upon waking:
- - it runs each entry that is active on that second
- - it calculates the next run times for the jobs that were run
- - it re-sorts the array of entries by next activation time.
- - it goes to sleep until the soonest job.
-*/
-package cron
--- a/backend/vendor/github.com/robfig/cron/parser.go
+++ b/backend/vendor/github.com/robfig/cron/parser.go
@@ -1,380 +0,0 @@
-package cron
-
-import (
-	"fmt"
-	"math"
-	"strconv"
-	"strings"
-	"time"
-)
-
-// Configuration options for creating a parser. Most options specify which
-// fields should be included, while others enable features. If a field is not
-// included the parser will assume a default value. These options do not change
-// the order fields are parse in.
-type ParseOption int
-
-const (
-	Second      ParseOption = 1 << iota // Seconds field, default 0
-	Minute                              // Minutes field, default 0
-	Hour                                // Hours field, default 0
-	Dom                                 // Day of month field, default *
-	Month                               // Month field, default *
-	Dow                                 // Day of week field, default *
-	DowOptional                         // Optional day of week field, default *
-	Descriptor                          // Allow descriptors such as @monthly, @weekly, etc.
-)
-
-var places = []ParseOption{
-	Second,
-	Minute,
-	Hour,
-	Dom,
-	Month,
-	Dow,
-}
-
-var defaults = []string{
-	"0",
-	"0",
-	"0",
-	"*",
-	"*",
-	"*",
-}
-
-// A custom Parser that can be configured.
-type Parser struct {
-	options   ParseOption
-	optionals int
-}
-
-// Creates a custom Parser with custom options.
-//
-//  // Standard parser without descriptors
-//  specParser := NewParser(Minute | Hour | Dom | Month | Dow)
-//  sched, err := specParser.Parse("0 0 15 */3 *")
-//
-//  // Same as above, just excludes time fields
-//  subsParser := NewParser(Dom | Month | Dow)
-//  sched, err := specParser.Parse("15 */3 *")
-//
-//  // Same as above, just makes Dow optional
-//  subsParser := NewParser(Dom | Month | DowOptional)
-//  sched, err := specParser.Parse("15 */3")
-//
-func NewParser(options ParseOption) Parser {
-	optionals := 0
-	if options&DowOptional > 0 {
-		options |= Dow
-		optionals++
-	}
-	return Parser{options, optionals}
-}
-
-// Parse returns a new crontab schedule representing the given spec.
-// It returns a descriptive error if the spec is not valid.
-// It accepts crontab specs and features configured by NewParser.
-func (p Parser) Parse(spec string) (Schedule, error) {
-	if len(spec) == 0 {
-		return nil, fmt.Errorf("Empty spec string")
-	}
-	if spec[0] == '@' && p.options&Descriptor > 0 {
-		return parseDescriptor(spec)
-	}
-
-	// Figure out how many fields we need
-	max := 0
-	for _, place := range places {
-		if p.options&place > 0 {
-			max++
-		}
-	}
-	min := max - p.optionals
-
-	// Split fields on whitespace
-	fields := strings.Fields(spec)
-
-	// Validate number of fields
-	if count := len(fields); count < min || count > max {
-		if min == max {
-			return nil, fmt.Errorf("Expected exactly %d fields, found %d: %s", min, count, spec)
-		}
-		return nil, fmt.Errorf("Expected %d to %d fields, found %d: %s", min, max, count, spec)
-	}
-
-	// Fill in missing fields
-	fields = expandFields(fields, p.options)
-
-	var err error
-	field := func(field string, r bounds) uint64 {
-		if err != nil {
-			return 0
-		}
-		var bits uint64
-		bits, err = getField(field, r)
-		return bits
-	}
-
-	var (
-		second     = field(fields[0], seconds)
-		minute     = field(fields[1], minutes)
-		hour       = field(fields[2], hours)
-		dayofmonth = field(fields[3], dom)
-		month      = field(fields[4], months)
-		dayofweek  = field(fields[5], dow)
-	)
-	if err != nil {
-		return nil, err
-	}
-
-	return &SpecSchedule{
-		Second: second,
-		Minute: minute,
-		Hour:   hour,
-		Dom:    dayofmonth,
-		Month:  month,
-		Dow:    dayofweek,
-	}, nil
-}
-
-func expandFields(fields []string, options ParseOption) []string {
-	n := 0
-	count := len(fields)
-	expFields := make([]string, len(places))
-	copy(expFields, defaults)
-	for i, place := range places {
-		if options&place > 0 {
-			expFields[i] = fields[n]
-			n++
-		}
-		if n == count {
-			break
-		}
-	}
-	return expFields
-}
-
-var standardParser = NewParser(
-	Minute | Hour | Dom | Month | Dow | Descriptor,
-)
-
-// ParseStandard returns a new crontab schedule representing the given standardSpec
-// (https://en.wikipedia.org/wiki/Cron). It differs from Parse requiring to always
-// pass 5 entries representing: minute, hour, day of month, month and day of week,
-// in that order. It returns a descriptive error if the spec is not valid.
-//
-// It accepts
-//   - Standard crontab specs, e.g. "* * * * ?"
-//   - Descriptors, e.g. "@midnight", "@every 1h30m"
-func ParseStandard(standardSpec string) (Schedule, error) {
-	return standardParser.Parse(standardSpec)
-}
-
-var defaultParser = NewParser(
-	Second | Minute | Hour | Dom | Month | DowOptional | Descriptor,
-)
-
-// Parse returns a new crontab schedule representing the given spec.
-// It returns a descriptive error if the spec is not valid.
-//
-// It accepts
-//   - Full crontab specs, e.g. "* * * * * ?"
-//   - Descriptors, e.g. "@midnight", "@every 1h30m"
-func Parse(spec string) (Schedule, error) {
-	return defaultParser.Parse(spec)
-}
-
-// getField returns an Int with the bits set representing all of the times that
-// the field represents or error parsing field value.  A "field" is a comma-separated
-// list of "ranges".
-func getField(field string, r bounds) (uint64, error) {
-	var bits uint64
-	ranges := strings.FieldsFunc(field, func(r rune) bool { return r == ',' })
-	for _, expr := range ranges {
-		bit, err := getRange(expr, r)
-		if err != nil {
-			return bits, err
-		}
-		bits |= bit
-	}
-	return bits, nil
-}
-
-// getRange returns the bits indicated by the given expression:
-//   number | number "-" number [ "/" number ]
-// or error parsing range.
-func getRange(expr string, r bounds) (uint64, error) {
-	var (
-		start, end, step uint
-		rangeAndStep     = strings.Split(expr, "/")
-		lowAndHigh       = strings.Split(rangeAndStep[0], "-")
-		singleDigit      = len(lowAndHigh) == 1
-		err              error
-	)
-
-	var extra uint64
-	if lowAndHigh[0] == "*" || lowAndHigh[0] == "?" {
-		start = r.min
-		end = r.max
-		extra = starBit
-	} else {
-		start, err = parseIntOrName(lowAndHigh[0], r.names)
-		if err != nil {
-			return 0, err
-		}
-		switch len(lowAndHigh) {
-		case 1:
-			end = start
-		case 2:
-			end, err = parseIntOrName(lowAndHigh[1], r.names)
-			if err != nil {
-				return 0, err
-			}
-		default:
-			return 0, fmt.Errorf("Too many hyphens: %s", expr)
-		}
-	}
-
-	switch len(rangeAndStep) {
-	case 1:
-		step = 1
-	case 2:
-		step, err = mustParseInt(rangeAndStep[1])
-		if err != nil {
-			return 0, err
-		}
-
-		// Special handling: "N/step" means "N-max/step".
-		if singleDigit {
-			end = r.max
-		}
-	default:
-		return 0, fmt.Errorf("Too many slashes: %s", expr)
-	}
-
-	if start < r.min {
-		return 0, fmt.Errorf("Beginning of range (%d) below minimum (%d): %s", start, r.min, expr)
-	}
-	if end > r.max {
-		return 0, fmt.Errorf("End of range (%d) above maximum (%d): %s", end, r.max, expr)
-	}
-	if start > end {
-		return 0, fmt.Errorf("Beginning of range (%d) beyond end of range (%d): %s", start, end, expr)
-	}
-	if step == 0 {
-		return 0, fmt.Errorf("Step of range should be a positive number: %s", expr)
-	}
-
-	return getBits(start, end, step) | extra, nil
-}
-
-// parseIntOrName returns the (possibly-named) integer contained in expr.
-func parseIntOrName(expr string, names map[string]uint) (uint, error) {
-	if names != nil {
-		if namedInt, ok := names[strings.ToLower(expr)]; ok {
-			return namedInt, nil
-		}
-	}
-	return mustParseInt(expr)
-}
-
-// mustParseInt parses the given expression as an int or returns an error.
-func mustParseInt(expr string) (uint, error) {
-	num, err := strconv.Atoi(expr)
-	if err != nil {
-		return 0, fmt.Errorf("Failed to parse int from %s: %s", expr, err)
-	}
-	if num < 0 {
-		return 0, fmt.Errorf("Negative number (%d) not allowed: %s", num, expr)
-	}
-
-	return uint(num), nil
-}
-
-// getBits sets all bits in the range [min, max], modulo the given step size.
-func getBits(min, max, step uint) uint64 {
-	var bits uint64
-
-	// If step is 1, use shifts.
-	if step == 1 {
-		return ^(math.MaxUint64 << (max + 1)) & (math.MaxUint64 << min)
-	}
-
-	// Else, use a simple loop.
-	for i := min; i <= max; i += step {
-		bits |= 1 << i
-	}
-	return bits
-}
-
-// all returns all bits within the given bounds.  (plus the star bit)
-func all(r bounds) uint64 {
-	return getBits(r.min, r.max, 1) | starBit
-}
-
-// parseDescriptor returns a predefined schedule for the expression, or error if none matches.
-func parseDescriptor(descriptor string) (Schedule, error) {
-	switch descriptor {
-	case "@yearly", "@annually":
-		return &SpecSchedule{
-			Second: 1 << seconds.min,
-			Minute: 1 << minutes.min,
-			Hour:   1 << hours.min,
-			Dom:    1 << dom.min,
-			Month:  1 << months.min,
-			Dow:    all(dow),
-		}, nil
-
-	case "@monthly":
-		return &SpecSchedule{
-			Second: 1 << seconds.min,
-			Minute: 1 << minutes.min,
-			Hour:   1 << hours.min,
-			Dom:    1 << dom.min,
-			Month:  all(months),
-			Dow:    all(dow),
-		}, nil
-
-	case "@weekly":
-		return &SpecSchedule{
-			Second: 1 << seconds.min,
-			Minute: 1 << minutes.min,
-			Hour:   1 << hours.min,
-			Dom:    all(dom),
-			Month:  all(months),
-			Dow:    1 << dow.min,
-		}, nil
-
-	case "@daily", "@midnight":
-		return &SpecSchedule{
-			Second: 1 << seconds.min,
-			Minute: 1 << minutes.min,
-			Hour:   1 << hours.min,
-			Dom:    all(dom),
-			Month:  all(months),
-			Dow:    all(dow),
-		}, nil
-
-	case "@hourly":
-		return &SpecSchedule{
-			Second: 1 << seconds.min,
-			Minute: 1 << minutes.min,
-			Hour:   all(hours),
-			Dom:    all(dom),
-			Month:  all(months),
-			Dow:    all(dow),
-		}, nil
-	}
-
-	const every = "@every "
-	if strings.HasPrefix(descriptor, every) {
-		duration, err := time.ParseDuration(descriptor[len(every):])
-		if err != nil {
-			return nil, fmt.Errorf("Failed to parse duration %s: %s", descriptor, err)
-		}
-		return Every(duration), nil
-	}
-
-	return nil, fmt.Errorf("Unrecognized descriptor: %s", descriptor)
-}
--- a/backend/vendor/github.com/robfig/cron/spec.go
+++ b/backend/vendor/github.com/robfig/cron/spec.go
@@ -1,158 +0,0 @@
-package cron
-
-import "time"
-
-// SpecSchedule specifies a duty cycle (to the second granularity), based on a
-// traditional crontab specification. It is computed initially and stored as bit sets.
-type SpecSchedule struct {
-	Second, Minute, Hour, Dom, Month, Dow uint64
-}
-
-// bounds provides a range of acceptable values (plus a map of name to value).
-type bounds struct {
-	min, max uint
-	names    map[string]uint
-}
-
-// The bounds for each field.
-var (
-	seconds = bounds{0, 59, nil}
-	minutes = bounds{0, 59, nil}
-	hours   = bounds{0, 23, nil}
-	dom     = bounds{1, 31, nil}
-	months  = bounds{1, 12, map[string]uint{
-		"jan": 1,
-		"feb": 2,
-		"mar": 3,
-		"apr": 4,
-		"may": 5,
-		"jun": 6,
-		"jul": 7,
-		"aug": 8,
-		"sep": 9,
-		"oct": 10,
-		"nov": 11,
-		"dec": 12,
-	}}
-	dow = bounds{0, 6, map[string]uint{
-		"sun": 0,
-		"mon": 1,
-		"tue": 2,
-		"wed": 3,
-		"thu": 4,
-		"fri": 5,
-		"sat": 6,
-	}}
-)
-
-const (
-	// Set the top bit if a star was included in the expression.
-	starBit = 1 << 63
-)
-
-// Next returns the next time this schedule is activated, greater than the given
-// time.  If no time can be found to satisfy the schedule, return the zero time.
-func (s *SpecSchedule) Next(t time.Time) time.Time {
-	// General approach:
-	// For Month, Day, Hour, Minute, Second:
-	// Check if the time value matches.  If yes, continue to the next field.
-	// If the field doesn't match the schedule, then increment the field until it matches.
-	// While incrementing the field, a wrap-around brings it back to the beginning
-	// of the field list (since it is necessary to re-verify previous field
-	// values)
-
-	// Start at the earliest possible time (the upcoming second).
-	t = t.Add(1*time.Second - time.Duration(t.Nanosecond())*time.Nanosecond)
-
-	// This flag indicates whether a field has been incremented.
-	added := false
-
-	// If no time is found within five years, return zero.
-	yearLimit := t.Year() + 5
-
-WRAP:
-	if t.Year() > yearLimit {
-		return time.Time{}
-	}
-
-	// Find the first applicable month.
-	// If it's this month, then do nothing.
-	for 1<<uint(t.Month())&s.Month == 0 {
-		// If we have to add a month, reset the other parts to 0.
-		if !added {
-			added = true
-			// Otherwise, set the date at the beginning (since the current time is irrelevant).
-			t = time.Date(t.Year(), t.Month(), 1, 0, 0, 0, 0, t.Location())
-		}
-		t = t.AddDate(0, 1, 0)
-
-		// Wrapped around.
-		if t.Month() == time.January {
-			goto WRAP
-		}
-	}
-
-	// Now get a day in that month.
-	for !dayMatches(s, t) {
-		if !added {
-			added = true
-			t = time.Date(t.Year(), t.Month(), t.Day(), 0, 0, 0, 0, t.Location())
-		}
-		t = t.AddDate(0, 0, 1)
-
-		if t.Day() == 1 {
-			goto WRAP
-		}
-	}
-
-	for 1<<uint(t.Hour())&s.Hour == 0 {
-		if !added {
-			added = true
-			t = time.Date(t.Year(), t.Month(), t.Day(), t.Hour(), 0, 0, 0, t.Location())
-		}
-		t = t.Add(1 * time.Hour)
-
-		if t.Hour() == 0 {
-			goto WRAP
-		}
-	}
-
-	for 1<<uint(t.Minute())&s.Minute == 0 {
-		if !added {
-			added = true
-			t = t.Truncate(time.Minute)
-		}
-		t = t.Add(1 * time.Minute)
-
-		if t.Minute() == 0 {
-			goto WRAP
-		}
-	}
-
-	for 1<<uint(t.Second())&s.Second == 0 {
-		if !added {
-			added = true
-			t = t.Truncate(time.Second)
-		}
-		t = t.Add(1 * time.Second)
-
-		if t.Second() == 0 {
-			goto WRAP
-		}
-	}
-
-	return t
-}
-
-// dayMatches returns true if the schedule's day-of-week and day-of-month
-// restrictions are satisfied by the given time.
-func dayMatches(s *SpecSchedule, t time.Time) bool {
-	var (
-		domMatch bool = 1<<uint(t.Day())&s.Dom > 0
-		dowMatch bool = 1<<uint(t.Weekday())&s.Dow > 0
-	)
-	if s.Dom&starBit > 0 || s.Dow&starBit > 0 {
-		return domMatch && dowMatch
-	}
-	return domMatch || dowMatch
-}
--- a/backend/vendor/github.com/spf13/afero/go.mod
+++ b/backend/vendor/github.com/spf13/afero/go.mod
@@ -1,3 +1 @@
 module github.com/spf13/afero
-
-go 1.12
--- a/backend/vendor/github.com/spf13/jwalterweatherman/go.mod
+++ b/backend/vendor/github.com/spf13/jwalterweatherman/go.mod
@@ -1,3 +1 @@
 module github.com/spf13/jwalterweatherman
-
-go 1.12
--- a/backend/vendor/gopkg.in/yaml.v2/go.mod
+++ b/backend/vendor/gopkg.in/yaml.v2/go.mod
@@ -1,3 +1,5 @@
-module gopkg.in/yaml.v2
+module "gopkg.in/yaml.v2"

-require gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405
+require (
+	"gopkg.in/check.v1" v0.0.0-20161208181325-20d25e280405
+)
--- a/backend/vendor/gopkg.in/yaml.v2/go.sum
+++ b/backend/vendor/gopkg.in/yaml.v2/go.sum
@@ -1 +0,0 @@
-gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
--- a/backend/vendor/modules.txt
+++ b/backend/vendor/modules.txt
@@ -1,5 +1,7 @@
 # github.com/apex/log v1.1.1
 github.com/apex/log
+# github.com/dgrijalva/jwt-go v3.2.0+incompatible
+github.com/dgrijalva/jwt-go
 # github.com/fsnotify/fsnotify v1.4.7
 github.com/fsnotify/fsnotify
 # github.com/gin-contrib/sse v0.0.0-20190301062529-5545eab6dad3
@@ -47,8 +49,6 @@ github.com/modern-go/reflect2
 github.com/pelletier/go-toml
 # github.com/pkg/errors v0.8.1
 github.com/pkg/errors
-# github.com/robfig/cron v1.2.0
-github.com/robfig/cron
 # github.com/satori/go.uuid v1.2.0
 github.com/satori/go.uuid
 # github.com/spf13/afero v1.1.2
--- a/frontend/src/i18n/zh.js
+++ b/frontend/src/i18n/zh.js
@@ -236,6 +236,11 @@ export default {
  'Do you allow us to collect some statistics to improve Crawlab?': '您允许我们收集统计数据以更好地优化Crawlab？',
  'Saved file successfully': '成功保存文件',
  'An error happened when fetching the data': '请求数据时出错',
+  'Error when logging in (Please check username and password)': '登录时出错（请检查用户名密码）',
+  'Please enter the correct username': '请输入正确用户名',
+  'Password length should be no shorter than 5': '密码长度不能小于5',
+  'Two passwords must be the same': '两个密码必须要一致',
+  'username already exists': '用户名已存在',

  // 登录
  'Sign in': '登录',
--- a/frontend/src/router/index.js
+++ b/frontend/src/router/index.js
@@ -26,6 +26,7 @@ Vue.use(Router)
 **/
 export const constantRouterMap = [
  { path: '/login', component: () => import('../views/login/index'), hidden: true },
+  { path: '/signup', component: () => import('../views/login/index'), hidden: true },
  { path: '/404', component: () => import('../views/404'), hidden: true },
  { path: '/', redirect: '/home' },

@@ -222,7 +223,16 @@ router.beforeEach((to, from, next) => {
  } else {
    window.document.title = 'Crawlab'
  }
-  next()
+
+  if (['/login', '/signup'].includes(to.path)) {
+    next()
+  } else {
+    if (window.localStorage.getItem('token')) {
+      next()
+    } else {
+      next('/login')
+    }
+  }
 })

 router.afterEach((to, from, next) => {
--- a/frontend/src/store/index.js
+++ b/frontend/src/store/index.js
@@ -1,7 +1,7 @@
 import Vue from 'vue'
 import Vuex from 'vuex'
 import app from './modules/app'
-// import user from './modules/user'
+import user from './modules/user'
 import tagsView from './modules/tagsView'
 import dialogView from './modules/dialogView'
 import node from './modules/node'
@@ -20,7 +20,7 @@ Vue.use(Vuex)
 const store = new Vuex.Store({
  modules: {
    app,
-    // user,
+    user,
    tagsView,
    dialogView,
    node,
--- a/frontend/src/store/modules/user.js
+++ b/frontend/src/store/modules/user.js
@@ -1,9 +1,10 @@
-import { login, logout, getInfo } from '@/api/login'
-import { getToken, setToken, removeToken } from '@/utils/auth'
+import request from '../../api/request'

 const user = {
+  namespaced: true,
+
  state: {
-    token: getToken(),
+    // token: getToken(),
    name: '',
    avatar: '',
    roles: []
@@ -26,58 +27,60 @@ const user = {

  actions: {
    // 登录
-    Login ({ commit }, userInfo) {
+    login ({ commit }, userInfo) {
      const username = userInfo.username.trim()
      return new Promise((resolve, reject) => {
-        login(username, userInfo.password).then(response => {
-          const data = response.data
-          setToken(data.token)
-          commit('SET_TOKEN', data.token)
-          resolve()
-        }).catch(error => {
-          reject(error)
-        })
+        request.post('/login', { username, password: userInfo.password })
+          .then(response => {
+            const token = response.data.data
+            commit('SET_TOKEN', token)
+            window.localStorage.setItem('token', token)
+            resolve()
+          })
+          .catch(error => {
+            reject(error)
+          })
      })
    },

    // 获取用户信息
-    GetInfo ({ commit, state }) {
+    // getInfo ({ commit, state }) {
+    //   return new Promise((resolve, reject) => {
+    //     getInfo(state.token).then(response => {
+    //       const data = response.data
+    //       if (data.roles && data.roles.length > 0) { // 验证返回的roles是否是一个非空数组
+    //         commit('SET_ROLES', data.roles)
+    //       } else {
+    //         reject(new Error('getInfo: roles must be a non-null array !'))
+    //       }
+    //       commit('SET_NAME', data.name)
+    //       commit('SET_AVATAR', data.avatar)
+    //       resolve(response)
+    //     }).catch(error => {
+    //       reject(error)
+    //     })
+    //   })
+    // },
+
+    // 注册
+    register ({ dispatch, commit, state }, userInfo) {
      return new Promise((resolve, reject) => {
-        getInfo(state.token).then(response => {
-          const data = response.data
-          if (data.roles && data.roles.length > 0) { // 验证返回的roles是否是一个非空数组
-            commit('SET_ROLES', data.roles)
-          } else {
-            reject(new Error('getInfo: roles must be a non-null array !'))
-          }
-          commit('SET_NAME', data.name)
-          commit('SET_AVATAR', data.avatar)
-          resolve(response)
-        }).catch(error => {
-          reject(error)
-        })
+        request.put('/users', { username: userInfo.username, password: userInfo.password })
+          .then(() => {
+            resolve()
+          })
+          .catch(r => {
+            reject(r.response.data.error)
+          })
      })
    },

    // 登出
-    LogOut ({ commit, state }) {
+    logout ({ commit, state }) {
      return new Promise((resolve, reject) => {
-        logout(state.token).then(() => {
-          commit('SET_TOKEN', '')
-          commit('SET_ROLES', [])
-          removeToken()
-          resolve()
-        }).catch(error => {
-          reject(error)
-        })
-      })
-    },
-
-    // 前端 登出
-    FedLogOut ({ commit }) {
-      return new Promise(resolve => {
+        window.localStorage.removeItem('token')
        commit('SET_TOKEN', '')
-        removeToken()
+        commit('SET_ROLES', [])
        resolve()
      })
    }
--- a/frontend/src/views/layout/components/Navbar.vue
+++ b/frontend/src/views/layout/components/Navbar.vue
@@ -51,6 +51,7 @@ export default {
      this.$store.dispatch('ToggleSideBar')
    },
    logout () {
+      this.$store.dispatch('user/logout')
      this.$router.push('/login')
    },
    setLang (lang) {
--- a/frontend/src/views/login/index.vue
+++ b/frontend/src/views/login/index.vue
@@ -50,9 +50,9 @@
        </div>
        <div class="right">
          <span v-if="isSignUp">{{$t('Has Account')}}, </span>
-          <span v-if="isSignUp" class="sign-in" @click="isSignUp=false">{{$t('Sign-in')}} ></span>
+          <span v-if="isSignUp" class="sign-in" @click="$router.push('/login')">{{$t('Sign-in')}} ></span>
          <span v-if="!isSignUp">{{$t('New to Crawlab')}}, </span>
-          <span v-if="!isSignUp" class="sign-up" @click="isSignUp=true">{{$t('Sign-up')}} ></span>
+          <span v-if="!isSignUp" class="sign-up" @click="$router.push('/signup')">{{$t('Sign-up')}} ></span>
        </div>
      </div>
      <div class="tips">
@@ -66,21 +66,29 @@
 </template>

 <script>
-import { isvalidUsername } from '@/utils/validate'
+import { isValidUsername } from '../../utils/validate'

 export default {
  name: 'Login',
  data () {
    const validateUsername = (rule, value, callback) => {
-      if (!isvalidUsername(value)) {
-        callback(new Error('请输入正确的用户名'))
+      if (!isValidUsername(value)) {
+        callback(new Error(this.$t('Please enter the correct username')))
      } else {
        callback()
      }
    }
    const validatePass = (rule, value, callback) => {
      if (value.length < 5) {
-        callback(new Error('密码不能小于5位'))
+        callback(new Error(this.$t('Password length should be no shorter than 5')))
+      } else {
+        callback()
+      }
+    }
+    const validateConfirmPass = (rule, value, callback) => {
+      if (!this.isSignUp) return callback()
+      if (value !== this.loginForm.password) {
+        callback(new Error(this.$t('Two passwords must be the same')))
      } else {
        callback()
      }
@@ -93,41 +101,47 @@ export default {
      },
      loginRules: {
        username: [{ required: true, trigger: 'blur', validator: validateUsername }],
-        password: [{ required: true, trigger: 'blur', validator: validatePass }]
+        password: [{ required: true, trigger: 'blur', validator: validatePass }],
+        confirmPassword: [{ required: true, trigger: 'blur', validator: validateConfirmPass }]
      },
      loading: false,
      pwdType: 'password',
-      redirect: undefined,
-      isSignUp: false
+      redirect: undefined
+    }
+  },
+  computed: {
+    isSignUp () {
+      return this.$route.path === '/signup'
    }
  },
  methods: {
-    showPwd () {
-      if (this.pwdType === 'password') {
-        this.pwdType = ''
-      } else {
-        this.pwdType = 'password'
-      }
-    },
    handleLogin () {
-      this.$router.push('/')
-
-      // this.$refs.loginForm.validate(valid => {
-      //   if (valid) {
-      //     this.loading = true
-      //     this.$store.dispatch('Login', this.loginForm).then(() => {
-      //       this.loading = false
-      //       this.$router.push({ path: this.redirect || '/' })
-      //     }).catch(() => {
-      //       this.loading = false
-      //     })
-      //   } else {
-      //     console.log('error submit!!')
-      //     return false
-      //   }
-      // })
+      this.$refs.loginForm.validate(valid => {
+        if (valid) {
+          this.loading = true
+          this.$store.dispatch('user/login', this.loginForm).then(() => {
+            this.loading = false
+            this.$router.push({ path: this.redirect || '/' })
+          }).catch(() => {
+            this.$message.error(this.$t('Error when logging in (Please check username and password)'))
+            this.loading = false
+          })
+        }
+      })
    },
    handleSignup () {
+      this.$refs.loginForm.validate(valid => {
+        if (valid) {
+          this.loading = true
+          this.$store.dispatch('user/register', this.loginForm).then(() => {
+            this.handleLogin()
+            this.loading = false
+          }).catch(err => {
+            this.$message.error(this.$t(err))
+            this.loading = false
+          })
+        }
+      })
    }
  },
  mounted () {
@@ -289,17 +303,17 @@ const initCanvas = () => {
        line-height: 44px;
      }
    }
-  }

-  .el-button {
-    height: 44px;
-    border-radius: 22px;
-  }
+    .el-button {
+      height: 44px;
+      border-radius: 22px;
+    }

-  #canvas {
-    position: fixed;
-    top: 0;
-    left: 0;
+    #canvas {
+      position: fixed;
+      top: 0;
+      left: 0;
+    }
  }
 </style>
				`@@ -1 +0,0 @@`
				`gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=`