The picture of the verification code cannot be displayed
回眸的冷漠2018-11-18 19:46:33
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Can generate four-letter words, but cannot generate pictures. The captured exception prompts that var numtxt in the refresh method = req.session.validat_num = validat_num in r.random(4) is undefined. Does anyone know what is going on?
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
