Saving a notebook when the jupyter server won't allow it (e.g. Request Entity Too Large)

notebook.save.js

(function(console){

    console.save = function(data, filename){

        if(!data) {
            data = Jupyter.notebook.toJSON();
        }

        filename = Jupyter.notebook.notebook_name;
        if(!filename) {
          filename = 'console.ipynb'
        }
        
        
        if(typeof data === "object"){
            data = JSON.stringify(data, undefined, 4)
        }

        var blob = new Blob([data], {type: 'text/json'}),
            e    = document.createEvent('MouseEvents'),
            a    = document.createElement('a')

        a.download = filename
        a.href = window.URL.createObjectURL(blob)
        a.dataset.downloadurl =  ['text/json', a.download, a.href].join(':')
        e.initMouseEvent('click', true, false, window, 0, 0, 0, 0, 0, false, false, false, false, 0, null)
        a.dispatchEvent(e)
    }
})(console)