Node js - How to send request into small chunk of data (Error: request entity too large)

Question

Every time I am trying to send a huge Json object(contains images base64) over the network to my node js server.I get this

Error: request entity too large

There is solution like this link ( stackoverflow question ) that recommend to increase the limit on the node js server. I am looking for a client side solution. Is there any way to break down the data sent and have the server wait to receive all the packets and then process? (promise??)

Hypothetically speaking , if my files is 20mb, even if my limit is set to 5mb, I will be able to send it, it will just take more time. Is it possible? Can you please put me on the right track?

I am using express on the back end side

Here some code to refer:

    //AJAX CALL
    var promise = $.Deferred();
    $.ajax('/module/report/ddl',{
        data: {
            widget: JSON.stringify(widget), <--- large, very large
            filename: filename,
            username: username,
            reportname: reportName
        },
        type: 'POST',
        success: function(result){
            //Do something
            promise.resolve(result);
        },
        error :function(err) {
            /* Act on the event */
            promise.reject(err);
        }
    });
    return promise;
}

Here is my server side

   router.route('/ddl').post(ddlReport));
   function ddlReport(req, res){
     var filename = req.body.filename;
     var widgets = req.body.widget; <--- Once again large
     var username = req.body.username;


ctrl.ddlProcess(widgets,filename,title,username,function(err, result){
    if(err){
        res.status(422).send(err);
    }else {
        res.send(result);
    }
});

}

If you need anymore information, let me know! I am trying to find a solution that would be best even if it is not the one that I suggested!

Thank you for your time! Have good day!

Answer 1

Have you tried to break your large json into small pieces and send them separately? Just add some additional info like {packet: 1, total: 20, data: ... (one small piece of large data)} Then send them at same time via ajax or one by one. And on node server side collect all of those 20 pieces. Additionally you can have some checksum.