EmbeddedFilesEndpoint not working for index.html in subdirectory

[czy-29]

I have the following two files at the same level of Cargo.toml:

static/index.html
static/test/index.html

Then I wrote the following code:

use poem::{endpoint::EmbeddedFilesEndpoint, listener::TcpListener, Route, Server};
use rust_embed::RustEmbed;

#[derive(RustEmbed)]
#[folder = "static"]
pub struct Static;

#[tokio::main]
async fn main() -> Result<(), std::io::Error> {
    if std::env::var_os("RUST_LOG").is_none() {
        std::env::set_var("RUST_LOG", "poem=debug");
    }
    tracing_subscriber::fmt::init();

    let app = Route::new().nest("/static", EmbeddedFilesEndpoint::<Static>::new());
    Server::new(TcpListener::bind("0.0.0.0:3000"))
        .run(app)
        .await
}

When I visit http://127.0.0.1:3000/static, the program can get static/index.html correctly.
When I visit http://127.0.0.1:3000/static/test/index.html, the program can also get static/test/index.html correctly.
But when I visit http://127.0.0.1:3000/static/test and http://127.0.0.1:3000/static/test/, I get 404 errors. But they should be correctly redirected to static/test/index.html just like static/index.html.
I think this is a bug.

[czy-29]

中文版本：
标题：EmbeddedFilesEndpoint对于子目录中的index.html不工作

我在Cargo.toml的相同层级下有如下两个文件：

static/index.html
static/test/index.html

然后我写了如下代码：

use poem::{endpoint::EmbeddedFilesEndpoint, listener::TcpListener, Route, Server};
use rust_embed::RustEmbed;

#[derive(RustEmbed)]
#[folder = "static"]
pub struct Static;

#[tokio::main]
async fn main() -> Result<(), std::io::Error> {
    if std::env::var_os("RUST_LOG").is_none() {
        std::env::set_var("RUST_LOG", "poem=debug");
    }
    tracing_subscriber::fmt::init();

    let app = Route::new().nest("/static", EmbeddedFilesEndpoint::<Static>::new());
    Server::new(TcpListener::bind("0.0.0.0:3000"))
        .run(app)
        .await
}

当我访问http://127.0.0.1:3000/static时，程序可以正确地获取static/index.html。
当我访问http://127.0.0.1:3000/static/test/index.html时，程序也可以正确地获取static/test/index.html。
但是当我访问http://127.0.0.1:3000/static/test以及 http://127.0.0.1:3000/static/test/时，均得到404错误。但它们本应该像static/index.html一样，被正确地重定向到static/test/index.html上。
我认为这是一个bug。

[czy-29]

I submitted a PR to fix this bug, welcome to review: #825
我自己提交了修复本bug的pr，欢迎大佬们review：#825