. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 6.3 HTTP servers and clients . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . implementions of HTTP (HTTPServer and AsyncHTTPClient). • An asynchronous networking library including the classes IOLoop and IOStream, which serve as the building blocks for the HTTP components and can other protocols. The Tornado web framework and HTTP server together offer a full-stack alternative to WSGI. While it is possible to use the Tornado HTTP server as a container for other WSGI frameworks

Prerequisites: Tornado 6.3 requires Python 3.9 or newer. The following optional packages may be useful:pycurl [http://pycurl.io/] is used by the optional tornado.curl_httpclient. Libcurl version 7.22 or higher is required browser HTTP servers and clients tornado.httpserver — Non-blocking HTTP server tornado.httpclient — Asynchronous HTTP client tornado.httputil — Manipulate HTTP headers and URLs tornado.http1connection http1connection – HTTP/1.x client/server implementation Asynchronous networking tornado.ioloop — Main event loop tornado.iostream — Convenient wrappers for non-blocking socketstornado.netutil — Miscellaneous network

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;