nodejs 设置允许跨域

app. all( '/decompression', function( req, res, next) {

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

// res.header('Access-Control-Allow-Methods', 'PUT, GET, POST, DELETE, OPTIONS');

// res.header("Access-Control-Allow-Headers", "X-Requested-With");

// res.header('Access-Control-Allow-Headers', 'Content-Type');

next();

});