查找token

查找数据库Token是否存在

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UserSchema.statics.findByToken = function (token) {
 var User = this;
 var decoded;

 try {
   decoded = jwt.verify(token, 'abc123');
 } catch (e) {
   return Promise.reject();
 }

 return User.findOne({
   '_id': decoded._id,
   'tokens.token': token,
   'tokens.access': 'auth'
 });
};

auth-middleware

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//auth middlewire,代码重用性高。
var authenticate = (req, res, next) => {
 var token = req.header('x-auth');

 User.findByToken(token).then((user) => {
   if (!user) {
     return Promise.reject();
   }

   req.user = user;
   req.token = token;
   next();
 }).catch((e) => {
   res.status(401).send();
 });
};

url

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app.get('/users/me', authenticate, (req, res) => {
 res.send(req.user);
});

完整代码

postman.js

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var mongoose = require('mongoose');
var express = require('express');
var bodyParser = require('body-parser');
const {ObjectID} = require('mongodb');
var _ = require('lodash');

const validator = require('validator');


const jwt = require('jsonwebtoken');
//app
var app = express();
const port = process.env.PORT || 3000;
//express middleware  Jonson对象与字符串转换。
app.use(bodyParser.json());

//
mongoose.Promise = global.Promise;
//连接mogodb
mongoose.connect(process.env.MONGODB_URI || 'mongodb://localhost:27017/TodoApp');

//模版
var Todo = mongoose.model('Todo',{
   text:{
     type:String,  //类型
     required:true, //必须要有
     minlength:1, //最小长度
     trim:true   //去除空格
   },
   completed:{
     type:Boolean,
     default:false  //默认值
   },
   completedAt:{
     type:Number,
     default:null
   }
});





var UserSchema = new mongoose.Schema({
 email: {
   type: String,
   required: true,
   trim: true,
   minlength: 1,
   unique: true,
   validate: {
     validator: validator.isEmail,
     message: '{VALUE} is not a valid email'
   }
 },
 password: {
   type: String,
   require: true,
   minlength: 6
 },
 tokens: [{
   access: {
     type: String,
     required: true
   },
   token: {
     type: String,
     required: true
   }
 }]
});

UserSchema.methods.toJSON = function () {
 var user = this;
 var userObject = user.toObject();

 return _.pick(userObject, ['_id', 'email']);
};

UserSchema.methods.generateAuthToken = function () {
 var user = this;
 var access = 'auth';
 var token = jwt.sign({_id: user._id.toHexString(), access}, 'abc123').toString();

 user.tokens = user.tokens.concat([{access,token}]);

 return user.save().then(() => {
   return token;  //返回token
 });
};


UserSchema.statics.findByToken = function (token) {
 var User = this;
 var decoded;

 try {
   decoded = jwt.verify(token, 'abc123');
 } catch (e) {
   return Promise.reject();
 }

 return User.findOne({
   '_id': decoded._id,
   'tokens.token': token,
   'tokens.access': 'auth'
 });
};


var User = mongoose.model('User', UserSchema);





//auth middlewire

var authenticate = (req, res, next) => {
 var token = req.header('x-auth');

 User.findByToken(token).then((user) => {
   if (!user) {
     return Promise.reject();
   }

   req.user = user;
   req.token = token;
   next();
 }).catch((e) => {
   res.status(401).send();
 });
};



app.get('/users/me', authenticate, (req, res) => {
 res.send(req.user);
});



//express route
app.post('/todos',(req,res)=>{
//  console.log(req.body);

   //建立对象document
   var todo = new Todo({
       text:req.body.text
   });
   //保存
     todo.save().then((doc)=>{
     res.send(doc);
   },(e)=>{
       res.status(400).send(e);
   });

})
//获取所有属性

app.get('/todos', (req, res) => {
 Todo.find().then((todos) => {
   res.send({todos});
 }, (e) => {
   res.status(400).send(e);
 })
});


//查询id
app.get('/todos/:id', (req, res) => {
 var id = req.params.id;

 if (!ObjectID.isValid(id)) {
   return res.status(404).send();
 }

 Todo.findById(id).then((todo) => {
   if (!todo) {
     return res.status(404).send();
   }

   res.send({todo});
 }).catch((e) => {
   res.status(400).send();
 });
});


//删除
app.delete('/todos/:id', (req, res) => {
 var id = req.params.id;

 if (!ObjectID.isValid(id)) {
   return res.status(404).send();
 }

 Todo.findByIdAndRemove(id).then((todo) => {
   if (!todo) {
     return res.status(404).send();
   }

   res.send({todo});
 }).catch((e) => {
   res.status(400).send();
 });
});

//更新
app.patch('/todos/:id', (req, res) => {
 var id = req.params.id;
 var body = _.pick(req.body, ['text', 'completed']);

 if (!ObjectID.isValid(id)) {
   return res.status(404).send();
 }

 if (_.isBoolean(body.completed) && body.completed) {
   body.completedAt = new Date().getTime();
 } else {
   body.completed = false;
   body.completedAt = null;
 }

 Todo.findByIdAndUpdate(id, {$set: body}, {new: true}).then((todo) => {
   if (!todo) {
     return res.status(404).send();
   }

   res.send({todo});
 }).catch((e) => {
   res.status(400).send();
 })
});


// POST /users
app.post('/users', (req, res) => {
 var body = _.pick(req.body, ['email', 'password']);
 var user = new User(body);

 user.save().then(() => {
   return user.generateAuthToken(); //调用方法,产生auth token并保存。
 }).then((token) => {
   res.header('x-auth', token).send(user); //设置了响应头
 }).catch((e) => {
   res.status(400).send(e);
 })
});

//监听
app.listen(port,()=>{
   console.log(`Start on port ${port}`);
});
module.exports = {
  app,
  Todo
}

测试

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1、打开mongoDB > ./mongod -dbpath /Users/jackson/Downloads/mongodb-data
2、运行 >node postman.js
3、打开postman 选择post 输入 >localhost:3000/users
Body中填入:
{
"email": "zhuimengshaonian07@gmail.com",
"password" : "123abc!"
}
返回:
{
   "_id": "5bfe716591e78c6a4ad8c164",
   "email": "zhuimengshaonian07@gmail.com"
}

header:
x-auth →eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJfaWQiOiI1YmZlNzE2NTkxZTc4YzZhNGFkOGMxNjQiLCJhY2Nlc3MiOiJhdXRoIiwiaWF0IjoxNTQzNDAxODI5fQ.wOKNzkls_w_jA5YVkCo0r9gFZ4-KtD6GarRiCDpAPr8

4、localhost:3000/users/me
增加header:
x-auth →eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJfaWQiOiI1YmZlNzE2NTkxZTc4YzZhNGFkOGMxNjQiLCJhY2Nlc3MiOiJhdXRoIiwiaWF0IjoxNTQzNDAxODI5fQ.wOKNzkls_w_jA5YVkCo0r9gFZ4-KtD6GarRiCDpAPr8

查询后返回:
{
   "_id": "5bfe716591e78c6a4ad8c164",
   "email": "zhuimengshaonian07@gmail.com"
}

nodejs渐入佳境[25]-express-middleware+mongoDB实现用户权限验证_区块链