首先,我是 Rust 的新手 :-)
问题:我想创建一个名为 RestServer 的模块,其中包含添加路由和启动服务器的方法( actix-web )。
struct Route
{
url: String,
request: String,
handler: Box<dyn Fn(HttpRequest) -> HttpResponse>
}
impl PartialEq for Route {
fn eq(&self, other: &Self) -> bool {
self.url == other.url
}
}
impl Eq for Route {}
impl Hash for Route {
fn hash<H: Hasher>(&self, hasher: &mut H) {
self.url.hash(hasher);
}
}
这是路由结构,该结构包含路由 url、请求类型(GET、POST 等)和 hanlder 是必须捕获请求并返回 HTTPResponse 的函数
pub struct RestServer
{
scopes: HashMap<String, Rc<HashSet<Route>>>,
routes: HashSet<Route>,
host: String,
}
impl RestServer {
pub fn add_route(self, req: &str, funct: impl Fn(HttpRequest) -> HttpResponse + 'static,
route: &str, scope: Option<&str>) -> RestServer
{
let mut routes_end = self.routes;
let mut scopes_end = self.scopes;
let url = self.host;
let route = Route {
url: String::from(route),
request: String::from(req),
handler: Box::new(funct)
};
if let Some(x) = scope {
if let Some(y) = scopes_end.get(x) {
let mut cloned_y = Rc::clone(y);
cloned_y.insert(route);
scopes_end.insert(String::from(x), cloned_y);
}else {
let mut hash_scopes = HashSet::new();
hash_scopes.insert(route);
scopes_end.insert(String::from(x), Rc::new(hash_scopes));
}
} else {
routes_end.insert(route);
}
RestServer {
scopes: scopes_end,
routes: routes_end,
host: String::from(url)
}
}
最新的代码是 RestServer 的实现。最重要的部分是add_route函数,该函数接收作为参数的路由字符串、函数处理程序、请求字符串和范围。首先我创建路由对象。我检查范围是否存在于 HashMap 中,如果是,我必须采用实际范围并更新 HashSet。
当我构建代码时,我收到以下错误
error[E0596]: cannot borrow data in an `Rc` as mutable
--> interface/src/rest/mod.rs:60:17
|
60 | cloned_y.insert(route);
| ^^^^^^^^ cannot borrow as mutable
|
= help: trait `DerefMut` is required to modify through a dereference, but it is not
implemented for `std::rc::Rc<std::collections::HashSet<rest::Route>>`
我知道编译器给了我一些帮助,但老实说,我不知道该怎么做,或者我是否可以用一些简单的解决方案来做。在谷歌进行大量搜索后,我在 RefCell 中找到了一个解决方案,但不是很清楚
在此先感谢您的帮助