How to read XML identity provider metadata?

[alexbran8]

I am trying to implement the SAML passport login, but I need to read the XML file containing the metadata received from my identity provider. How can I do this?

this is my code:
passport.use( new SamlStrategy( { path: '/login/callback', entryPoint: "/metadata.xml", issuer: 'passport-saml', protocol: "http://", cert: 'fake cert', // cert must be provided logoutUrl: "/ " }, function(profile, done) { findByEmail(profile.email, function(err, user) { if (err) { return done(err); } return done(null, user); }); } ) )

I could not find in the documentation exactly how to do this...