node——Request header field Authorization is not allowed by Access-Control-Allow-Headers in preflight response
我在请求头中添加了Authorization,结果出错,有跨越问题。
解决方法:
const allowHeaders = "Origin, Expires, Content-Type, X-E4M-With, Authorization";
app.all("*", function (req, res, next) {
//设置允许跨域的域名,*代表允许人员域名跨域
res.header("Access-Control-Allow-Origin", "*");
//允许的header类型
res.header("Access-Control-Allow-Headers", allowHeaders);
//允许的header类型
res.header("Access-Control-Allow-Methods", "DELETE,PUT,POST,GET,OPTIONS");
if (req.method.toLowerCase() == 'options')
res.send(200); //让options尝试请求快速结束
else
next();
})
在这里res.header("Access-Control-Allow-Headers", allowHeaders);
可以写想要使用的头