CORS error Access-Control-Allow-Origin Multiple type, nodejs

흔히 보는 CORS Access-control-allow-origin error

참고:

 

Single type

res.setHeader("Access-Control-Allow-Origin", "yourdomain" );

 

multiple type

 

app.use((req, res, next) => {

const allowedOrigins = ["http://localhost:3000", "https://yourdomain.co", "https://otheryourdomain.co"];

const origin = req.headers.origin;

if (allowedOrigins.includes(origin)) {

res.setHeader("Access-Control-Allow-Origin", origin);

}

 

next();

});

 

wildcard type (보안상 추천드리고 싶지않음)

res.header("Access-Control-Allow-Origin","*")