I am updating my twilio sms messaging tool to use express 4. On one one line of code I am having an issue.

var mediaUrl = request.param('MediaUrl' + i); //deprecated in express 4

When I attempt to update with this line

var mediaUrl = request.query.MediaUrl + i;

it no longer links to the twilio MediaURL. Here is the complete code for reference.

var numMedia = parseInt( request.body.NumMedia );
if (numMedia > 0) {
    for (i = 0; i < numMedia; i++) {

        //var mediaUrl = request.query.MediaUrl + i;
        var mediaUrl = request.param('MediaUrl' + i); //deprecated in express 4

        groupRef.where( {"memberNumber":request.query.From} ).limit(1).on( "value", function ( data ){
            if( data.count() ){
                data.forEach( function( snapshot ){
                    var member = snapshot.value();
                    messagesRef.push({
                        sid: request.body.MessageSid,
                        type:'text',
                        tstamp: new Date().toLocaleString('en-US', { timeZone: "America/Denver" }),
                        fromName:member.memberName,
                        fromNumber:request.body.From,
                        message:"",
                        media:mediaUrl,
                        groupNumber:request.body.To
                    });
                });
            }
        });
    }
}