Remember, in other API calls, using GET, all the parameters can and do appear as query parameters on the URL line; using POST, they appear in the body of the HTTP request.
记住，在其他 API 调用中，若使用 GET，则所有参数可以作为查询参数出现在 URL 行；若使用 POST，则参数出现在 HTTP 请求的主体中。
2
The first line checks to see if there is any POST data.
第一行检查是否有 POST 数据。
3
Later, when it becomes necessary to post the modified line to the bus, the whole cache line is written at once.