首先使用 npm 安装 jwt 和 express 框架，然后制作一个中间件文件，该文件将检查是否设置了 tokek。
Middleware.js：
let jwt = require('jsonwebtoken');
const config = require('./config.js');
let checkToken = (req, res, next) => {
let token = req.headers['authorization']; // Express headers are auto converted to lowercase
if (token) {
if (token.startsWith('Bearer ')) { // Checks if it contains Bearer
// Remove Bearer from string
token = token.slice(7, token.length); //Separate Bearer and get token
}
jwt.verify(token, config.secret, (err, decoded) => { //Inser the token and verify it.
if (err) {
return res.json({
status: false,
message: 'Token is not valid'
});
} else {
req.decoded = decoded;
next();
}
});
} else {
return res.json({
status: false,
message: 'Access denied! No token provided.'
});
}
};
接下来，创建一个包含秘密的配置文件。
配置js：
module.exports = {
secret: 'worldisfullofdevelopers'
};
最后，创建一个令牌路由，该路由将创建您的令牌，然后其余调用将针对该令牌进行身份验证。
Index.js：
const middleware = require('./middleware');
const jwt = require("jsonwebtoken");
const config = require('./config.js');
//Call token Route
app.use('/token', (req, res, next) => {
//Generate Token
let token = jwt.sign({ username: "test" },
config.secret,
{
expiresIn: '1h' // expires in 1 hours
}
);
//Send Token
res.json({
success: true,
message: 'Authentication successful!',
token: token
});
});
//Add Authentication to all routes
app.use(middleware.checkToken);
//===> All the routes after middleware will be checked for token
app.use('/getUser', (req, res, next) => {;
console.log('do something')
});