Multiple LDAP Server Configurations Support

[addnab]

This is to help with scenarios where you'd want the user who is getting authenticated to decide which LDAP Server they'd like to authenticate with.

The Multiple LDAP Server configurations can be stored in a Database and the required configuration to authenticate with can be fetched based on the user's request.

var getLDAPConfiguration = function(req, callback) {
    //Fetch the required configuration from DB
    var opts = fetchConfigFromDB(req.body.ldapServerId); 
    callback(null, opts);
  });
};

var LdapStrategy = require('passport-ldapauth').Strategy;

passport.use(new LdapStrategy(getLDAPConfiguration,
  function(user, done) {
    ...
    return done(null, user);
  }
));

[vesse]

Please see if you could detect given function signature and if the given function only accepts the callback print a deprecated-message and call without the req. Also, please include tests for both one and two parameters. This way the change would not be a breaking one and we can then remove the callback only -branch when making a bigger version bump.

[vesse]

Terribly sorry for the delay, I didn't want to accept a breaking change and then this just slipped my mind. I added some comments to the commit if you're still interested in getting this accepted.

[mrfamazing]

I need something similar actually, i like the idea of just being able to change the name of the strategy, if not the leave it the default 'ldapauth', then I can load multiple instances of LdapStrategy with different names for different domains. That would be a simple solution.