matter which HTTP method is used. prepare may produce output; if it calls finish (or redirect, etc), processing stops here. 4. One of the HTTP methods is called: get(), post(), put(), etc. If the URL regular called when the client disconnects; applications may choose to detect this case and halt further processing. Note that there is no guarantee that a closed connection can be detected promptly. • get_current_user place to set a custom Server header. Note that setting such headers in the normal flow of request processing may not do what you want, since headers may be reset during error handling. RequestHandler.write(chunk:

matter which HTTP method is used. prepare may produce output; if it calls finish (or redirect, etc), processing stops here. 4. One of the HTTP methods is called: get(), post(), put(), etc. If the URL regular called when the client disconnects; applications may choose to detect this case and halt further processing. Note that there is no guarantee that a closed connection can be detected promptly.get_current_user place to set a custom Server header. Note that setting such headers in the normal flow of request processing may not do what you want, since headers may be reset during error handling. RequestHandler.write(chunk:

库的结构。这个 GUI 库包含一些可供 开发者使用的类型，比如 Button 或 TextField。在此之上，gui 的用户希望创建自定义的可以 绘制于屏幕上的类型：比如，一个程序员可能会增加 Image，另一个可能会增加 SelectBox。 这个例子中并不会实现一个功能完善的 GUI 库，不过会展示其中各个部分是如何结合在一起 的。编写库的时候，我们不可能知晓并定义所有其他程序员希望创建的类型。我们所知晓的是 draw 方法时具体会发生什么，只要该值会有那个方法可供我们调用即可。 在拥有继承的语言中，可以定义一个名为 Component 的类，该类上有一个 draw 方法。其他的 类比如 Button、Image 和 SelectBox 会从 Component 派生并因此继承 draw 方法。它们各自都 可以重写 draw 方法来定义自己的行为，但是框架会把所有这些类型当作是 Component 的实例， Gecko/20100101 Firefox/99.0", "Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/ avif,image/webp,*/*;q=0.8", "Accept-Language: en-US,en;q=0.5", "Accept-Encoding: gzip, deflate