查找token

查找数据库Token是否存在

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
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

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
//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

1
2
3
app.get('/users/me', authenticate, (req, res) => {
  res.send(req.user);
});

完整代码

postman.js

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
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

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
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