return {"type": "click", "x": float(m.group(1)), "y": float(m.group(2))}
First, we do a type assertion to ensure the ResponseWriter implements http.Flusher. This is key to SSE. http.ResponseWriter buffers the response by default. Fine for usual http responses, but for SSE we need the response to be sent immediately, or “Flushed”.
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There are more things in the language to be excited about, but these three in，更多细节参见Line下载
首轮附加赛胜利已为学校带来丰厚收益，面对史上第二大的59分分差，虽败犹荣。