login 报出这个错误Error: Can't set headers after they are sent.

来源：10-9 session连接redis

iceps

2019-05-13

代码基本都用老师的代码了
登录成功报出这个错误Error: Can’t set headers after they are sent.
如果登录失败显示正常
如果store: sessionStore注释掉登录功能都正常了
不知道问题出在哪里？
错误信息如下

Error: Can't set headers after they are sent.
    at validateHeader (_http_outgoing.js:491:11)
    at ServerResponse.setHeader (_http_outgoing.js:498:3)
    at ServerResponse.header (C:\Users\Administrator\Desktop\all_files\blog-express\node_modules\express\lib\response.js:767:10)
    at ServerResponse.send (C:\Users\Administrator\Desktop\all_files\blog-express\node_modules\express\lib\response.js:170:12)
    at done (C:\Users\Administrator\Desktop\all_files\blog-express\node_modules\express\lib\response.js:1004:10)
    at Object.exports.renderFile (C:\Users\Administrator\Desktop\all_files\blog-express\node_modules\jade\lib\index.js:374:12)
    at View.exports.__express [as engine] (C:\Users\Administrator\Desktop\all_files\blog-express\node_modules\jade\lib\index.js:417:11)
    at View.render (C:\Users\Administrator\Desktop\all_files\blog-express\node_modules\express\lib\view.js:135:8)
    at tryRender (C:\Users\Administrator\Desktop\all_files\blog-express\node_modules\express\lib\application.js:640:10)
    at Function.render (C:\Users\Administrator\Desktop\all_files\blog-express\node_modules\express\lib\application.js:592:3)
Error: Can't set headers after they are sent.
    at validateHeader (_http_outgoing.js:491:11)
    at ServerResponse.setHeader (_http_outgoing.js:498:3)
    at ServerResponse.header (C:\Users\Administrator\Desktop\all_files\blog-express\node_modules\express\lib\response.js:767:10)
    at ServerResponse.contentType (C:\Users\Administrator\Desktop\all_files\blog-express\node_modules\express\lib\response.js:595:15)
    at ServerResponse.send (C:\Users\Administrator\Desktop\all_files\blog-express\node_modules\express\lib\response.js:145:14)
    at done (C:\Users\Administrator\Desktop\all_files\blog-express\node_modules\express\lib\response.js:1004:10)
    at Object.exports.renderFile (C:\Users\Administrator\Desktop\all_files\blog-express\node_modules\jade\lib\index.js:374:12)
    at View.exports.__express [as engine] (C:\Users\Administrator\Desktop\all_files\blog-express\node_modules\jade\lib\index.js:417:11)
    at View.render (C:\Users\Administrator\Desktop\all_files\blog-express\node_modules\express\lib\view.js:135:8)
    at tryRender (C:\Users\Administrator\Desktop\all_files\blog-express\node_modules\express\lib\application.js:640:10)

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