我会改进你的第一个解决方案：

I would improve your first solution:

• 在客户端，收集Highcharts图表的选项


• 使用每个图表的选项将AJAX发送到Highcharts服务器。返回将是base64或服务器上的图像的URL


• 当所有数据将从Highcharts服务器返回时，使用另一个AJAX将URL /图像发布到您的后端


• 在你的后端（Ruby，nodeJS，无论如何）收集图像并生成PPT

• on the client side, gather options for Highcharts charts
• send AJAX to Highcharts server with options for each of the charts. Returned will be base64 or URL to the image on the server
• when all data will come back from your Highcharts server, use another AJAX to post URLs/images to your backend
• in your backend (Ruby, nodeJS, whatever) gather images and generate PPT

前三步，这里是一个简单的实现： http://jsfiddle.net/3dptu2s3/

For first three steps, here is simple implementation: http://jsfiddle.net/3dptu2s3/

和代码（注意：你不必加载Highcharts库）：

And code (Note: you don't have to load Highcharts library):

• 一些基本选项：

• some basic options:

var chartOptions = {
    exporting: {
        url: 'http://export.highcharts.com/'
    },
    xAxis: {
        categories: ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun',
            'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec']
    },
    series: [{
        data: [29.9, 71.5, 106.4, 129.2, 144.0, 176.0, 135.6, 148.5, 216.4, 194.1, 95.6, 54.4]
    }]
};

var obj = {
        options: JSON.stringify(chartOptions),
        type: 'image/png',
        async: true
    },
    exportUrl = chartOptions.exporting.url,
    imgContainer = $("#container");

var calls = [];

for (var i = 0; i < 4; i++) {
    calls.push({
        type: 'post',
        url: exportUrl,
        data: obj,
    });
}

$.when(
    $.ajax(calls[0]),   
    $.ajax(calls[1]),
    $.ajax(calls[2]),
    $.ajax(calls[3])
).done(function (c1, c2, c3, c4) {
    var urls = [];
    $.each(arguments, function(i, chart) {
        urls.push(exportUrl + chart[0]);
        /*
            Here you can send URLs to the backend:
            $.post("url/to/backend", urls, function(data) {
                console.log(data);
            })
        */
    });
});

事实上，您可以通过AJAX进行通信使用前端。如果您愿意，可以直接从后端使用AJAX调用。

In fact, you can communicate by AJAX without using frontend. Use AJAX calls directly from your backend if you want to.