potato
高性能、简洁语法的HTTP框架。
用法
加入库的引用:
cargo add potato
cargo add tokio --features full
最简单的示例:
use potato::*;
#[http_get("/hello")]
async fn hello() -> HttpResponse {
HttpResponse::html("hello world")
}
#[tokio::main]
async fn main() {
let mut server = HttpServer::new("0.0.0.0:8080");
_ = server.run().await;
}
如上所示,定义一个HTTP请求处理函数非常简洁。通过将 http_get
替换为 http_post
、http_put
、http_delete
、http_options
、http_head
可创建对应请求的处理函数。
HTTP请求处理函数可直接指定String、i32等类型的参数,可简化从body或url query提取的步骤,简化开发。示例:
#[http_get("/hello")]
async fn hello(name: String) -> HttpResponse {
HttpResponse::html("hello world, {}!")
}
HTTP请求处理函数还可包含以下类型参数:
req: potato::HttpRequest
请求结构体
client: std::net::SocketAddr
客户端IP
wsctx: &mut potato::WebsocketContext
升级Websocket连接的上下文对象
示例参数完全体:
#[http_get("/hello")]
async fn hello(req: HttpRequest, client: std::net::SocketAddr, wsctx: &mut WebsocketContext) -> HttpResponse {
todo!()
}
按需加入即可,不需要的参数可省略。
HTTP请求处理函数返回类型支持以下几种格式:
anyhow::Result<()>
anyhow::Result<HttpResponse>
()
HttpResponse
示例Websocket:
#[http_get("/")]
async fn index() -> HttpResponse {
HttpResponse::html(r#"<!DOCTYPE html><html>
<head><title>Websocket Test</title></head>
<body>
<h1>Websocket Test</h1>
<div id="status"><p><em>Connecting...</em></p></div>
<script>
const status = document.getElementById('status');
const ws = new WebSocket(`ws://${location.host}/ws`);
ws.onopen = function() {
status.innerHTML = '<p><em>Connected!</em></p>';
};
</script>
</body>
</html>"#)
}
#[http_get("/ws")]
async fn websocket(req: HttpRequest, wsctx: &mut WebsocketContext) -> anyhow::Result<()> {
let mut ws = wsctx.upgrade_websocket(&req).await?;
ws.write_text("hello websocket").await?;
loop {
match ws.read_frame().await? {
WsFrame::Text(text) => ws.write_text(&text).await?,
WsFrame::Binary(bin) => ws.write_binary(bin).await?,
}
}
}
#[tokio::main]
async fn main() {
let mut server = HttpServer::new("0.0.0.0:8080");
_ = server.run().await;
}