your code in the same way you would if it were synchronous. This is especially important for error handling, since try/except blocks work as you would expect in coroutines while this is difficult to achieve that overrides methods such as write_error and get_current_user and then subclass your own BaseHandler instead of RequestHandler for all your specific handlers. Handling request input The request handler the arguments passed into member variables; it may not produce any output or call methods like send_error. 3. prepare() is called. This is most useful in a base class shared by all of your handler subclasses

main coroutine The Application object Subclassing RequestHandler Handling request input Overriding RequestHandler methods Error Handling Redirection Asynchronous handlers Templates and UI Configuring your code in the same way you would if it were synchronous. This is especially important for error handling, since try/except blocks work as you would expect in coroutines while this is difficult to achieve that overrides methods such as write_error and get_current_user and then subclass your own BaseHandler instead of RequestHandler for all your specific handlers. Handling request input The request handler

v0.3.0 Compiling rand v0.8.5 Compiling guessing_game v0.1.0 (file:///projects/guessing_game) error[E0308]: mismatched types --> src/main.rs:23:21 | 23 | match guess.cmp(&secret_number) { more information about this error, try `rustc --explain E0308`. 31/562Rust 程序设计语言 简体中文版 error: could not compile `guessing_game` (bin "guessing_game") due to 1 previous error 错误的核心表明这里有 不匹配的类型（mismatched variables 的新项目。 接着，在新建的 variables 目录，打开 src/main.rs 并将代码替换为如下代码，这些代码还不能 编译，我们会首次检查到不可变错误（immutability error）： 文件名：src/main.rs fn main() { let x = 5; println!("The value of x is: {x}"); x = 6;