To switch between modes, an additional check is required in each pass of the main program loop.
要在模式间进行切换，需要对主程序循环的每次循环执行额外的检查。
Nothing too complex in Listing 5: it simply performs an additional check for the user's input and passes that input to the srsearch parameter.
清单5并不复杂：它仅是简单地检查用户的输入，并将输入传递给srsearch参数。
To make sure that not only did the server finish with a request but that it also reported an OK status, add an additional check in your callback function as shown in Listing 7.
为了确保服务器不但完成了一个请求，而且还报告了一个OK状态，请在您的回调函数中添加另外一个检查功能，如 清单 7 所示。
To make sure that not only did the server finish with a request but that it also reported an OK status, add an additional check in your callback function as shown in Listing 7.
为了确保服务器不但完成了一个请求，而且还报告了一个OK状态，请在您的回调函数中添加另外一个检查功能，如 清单 7 所示。
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