在express.js中设置cookie出现j：前缀 [英] Set cookie in express.js appear j: prefix

问题描述

我正在尝试使用res.cookie设置cookie，如下所示：

I'm trying to set cookie using res.cookie like below:

res.cookie('userId',req.user._id); //set cookie here
console.log(req.user._id); //returned correct value, eg abc

然后我在我的cookie中看到j：abc ，为什么会发生这种情况？

then I'm seeing j:"abc" in my cookie, why does this happens?

推荐答案

我知道这有点晚了，但我自己也遇到过这个问题而且一直在挖掘一点点。看起来他们用j：为任何JSON字符串添加前缀，因此他们知道在解析它时它是一个JSON字符串。这基本上意味着你必须手动删除j：，如果你正在使用其他方式解析它。

I know this is a bit late, but I came across this issue myself and have been digging around a bit. It seems they're prefixing any JSON strings with "j:" so they know it's a JSON string when parsing it back. What this basically means is that you have to manually remove the "j:" if you're using some other way of parsing it.

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