如何解决此问题？：如果！options.algorithms抛出新的错误“应该设置算法”；错误：应设置算法

问题描述

我正在通过PACKT平台（https://github.com/PacktPublishing/Full-Stack-React-Projects-Second-Edition/tree/master/Chapter03%20and%2004/mern-skeleton）了解有关MERN的信息，但是由于发现下一个错误，所以我无法运行代码。

if (!options.algorithms) throw new Error('algorithms should be set');
        
Error: algorithms should be set
    at module.exports (/home/npalaciosv/Documents/Full Stack React Projects/Mern_Projects/Chapter3/node_modules/express-jwt/lib/index.js:22:34)
    at Module.eval (webpack:///./server/controllers/auth.controller.js?:65:73)
    at eval (webpack:///./server/controllers/auth.controller.js?:111:30)
    at Module../server/controllers/auth.controller.js (/home/npalaciosv/Documents/Full Stack React Projects/Mern_Projects/Chapter3/dist/server.generated.js:312:1)
    at __webpack_require__ (/home/npalaciosv/Documents/Full Stack React Projects/Mern_Projects/Chapter3/dist/server.generated.js:21:30)
    at Module.eval (webpack:///./server/routes/user.routes.js?:5:86)
    at eval (webpack:///./server/routes/user.routes.js?:43:30)
    at Module../server/routes/user.routes.js (/home/npalaciosv/Documents/Full Stack React Projects/Mern_Projects/Chapter3/dist/server.generated.js:396:1)
    at __webpack_require__ (/home/npalaciosv/Documents/Full Stack React Projects/Mern_Projects/Chapter3/dist/server.generated.js:21:30)
    at Module.eval (webpack:///./server/express.js?:17:77)
    at eval (webpack:///./server/express.js?:133:30)
    at Module../server/express.js (/home/npalaciosv/Documents/Full Stack React Projects/Mern_Projects/Chapter3/dist/server.generated.js:348:1)
    at __webpack_require__ (/home/npalaciosv/Documents/Full Stack React Projects/Mern_Projects/Chapter3/dist/server.generated.js:21:30)
    at eval (webpack:///./server/server.js?:3:66)
    at Module../server/server.js (/home/npalaciosv/Documents/Full Stack React Projects/Mern_Projects/Chapter3/dist/server.generated.js:408:1)
    at __webpack_require__ (/home/npalaciosv/Documents/Full Stack React Projects/Mern_Projects/Chapter3/dist/server.generated.js:21:30)

[nodemon] app crashed - waiting for file changes before starting...

我已经在其他类似的出版物中阅读了有关此主题的信息，发现解决方案是修复此代码：

expressJwt({ secret:  process.env.JWT_SECRET,algorithms: ['RS256'] })

@Tugayİlik回复

但是我不知道到底该在哪里添加此代码？

解决方法

我已经检查了您的文件。请转到“服务器”文件夹，=>“控制器”文件夹=>“ auth.controller.js”文件；然后从55-58行向下滚动，您会看到“

const requireSignin = expressJwt({
  secret: config.jwtSecret,userProperty: 'auth'
})

使用以下方法进行更改：

const requireSignin = expressJwt({
  secret: config.jwtSecret,userProperty: 'auth',algorithms: ['HS256'],});

请告诉我它是否有效。一切顺利。

事实是，使用您在此处放置的代码，任何人都很难帮助您确定代码的确切位置。

但是，就在“错误：应该设置算法”之前，您将看到类似以下内容：“ C：\ Users \ personsName \ Desktop \ folderName \ subFolderName \ fileName.js：65” 您只需注意subFolderName => fileName.js;然后，“：65”会显示错误所在的行或最近的行（请注意，它一定不是上面显示的65行，我只是用它作了说明）。

同样，通常应在您要查找的“ auth.js”文件之一中。

事实是您可能出现该错误的原因是因为代码中必须使用algorithm参数，而默认算法是HS256。

因此您应该粘贴的代码将是：

expressJwt({ secret:  process.env.JWT_SECRET,algorithms: ['HS256'] })

algorithm algorithm express-jwt