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| app.all("*",function(req,res,next){
//设置允许跨域的域名，*代表允许任意域名跨域
res.header("Access-Control-Allow-Origin",req.headers.origin||'*');
//允许的header类型
res.header("Access-Control-Allow-Headers","Content-Type,Authorization,X-Requested-With");
// //跨域允许的请求方式
res.header("Access-Control-Allow-Methods","PUT,POST,GET,DELETE,OPTIONS");
// 可以带cookies
res.header("Access-Control-Allow-Credentials",true);
if(req.method=='OPTIONS'){
res.sendStatus(200);
}else{
next();
}
})
|
