HTTP POST请求完成后，您将从Location响应报头读取图表url，并设置(重置)图表图像的源。

Once the HTTP POST request is complete, you will read the chart URL from the Location response header and (re) set the source of the chart image.

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首先，调用这个Ruby脚本收集图表数据(存储为graph . dot)；然后，使用GraphViz生成图表图像(这里使用circo，它指定一个圆形布局)。

Then, use GraphViz to generate the graph image (here, using circo, which specifies a circular layout). The process of generating this image is defined as follows.

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盲人会更容易辨别图表、菜单、图像、弹出窗口和超链接里的文本嵌入。

Blind users will be able to more easily discern text embedded in charts, menus, pictures, pop-ups, and hyperlinks.

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