开发环境创建分类时出现“jwt must be provided”错误求助

问题核心 #

提交创建分类的请求时，接口的认证中间件requireSignIn无法获取到JWT令牌，导致jsonwebtoken库抛出jwt must be provided错误，请求被拦截，无法执行后续业务逻辑。

错误栈 #

at module.exports [as verify] (C:\Users\AMANULLAH\Desktop\shopping app\backend\node_modules\jsonwebtoken\verify.js:60:17)
at requireSignIn (C:\Users\AMANULLAH\Desktop\shopping app\backend\middlewares\authmiddleware.js:9:28)
at Layer.handle [as handle_request] (C:\Users\AMANULLAH\Desktop\shopping app\backend\node_modules\express\lib\router\layer.js:95:5)
at next (C:\Users\AMANULLAH\Desktop\shopping app\backend\node_modules\express\lib\router\route.js:144:13)
at Route.dispatch (C:\Users\AMANULLAH\Desktop\shopping app\backend\node_modules\express\lib\router\route.js:114:3)  
at Layer.handle [as handle_request] (C:\Users\AMANULLAH\Desktop\shopping app\backend\node_modules\express\lib\router\layer.js:95:5)
at C:\Users\AMANULLAH\Desktop\shopping app\backend\node_modules\express\lib\router\index.js:284:15
at Function.process_params (C:\Users\AMANULLAH\Desktop\shopping app\backend\node_modules\express\lib\router\index.js:346:12)
at next (C:\Users\AMANULLAH\Desktop\shopping app\backend\node_modules\express\lib\router\index.js:280:10)
at Function.handle (C:\Users\AMANULLAH\Desktop\shopping app\backend\node_modules\express\lib\router\index.js:175:3)

错误根源是authmiddleware.js第9行的requireSignIn中间件调用jsonwebtoken的验证方法时，没有获取到JWT令牌，导致请求被拦截，无法进入分类创建的业务逻辑。

解决步骤 #

• 检查前端请求头，确认是否携带Authorization字段，格式必须为Bearer <用户登录后获取的JWT令牌>
• 确认用户已完成登录流程，且获取的JWT令牌未过期（可通过jwt.io解析验证）
• 查看authmiddleware.js中requireSignIn的实现，确认它读取JWT的位置（比如是否从req.headers.authorization提取），确保前端传参位置与后端逻辑匹配
• 临时排查时，可先注释创建分类接口的requireSignIn中间件，确认接口业务逻辑正常后再重新接入认证验证

内容的提问来源于stack exchange，提问作者AMAN ULLAH