💾 Archived View for alchemi.dev › en › projects › kochab › files › src › user_management › routes.rs captured on 2022-07-16 at 16:43:54.
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use anyhow::Result;
use serde::{Serialize, de::DeserializeOwned};
#[cfg(feature = "dashmap")]
use dashmap::DashMap;
#[cfg(not(feature = "dashmap"))]
use std::collections::HashMap;
#[cfg(not(feature = "dashmap"))]
use std::sync::RwLock;
use std::future::Future;
use crate::{Document, Request, Response};
use crate::types::document::HeadingLevel;
use crate::user_management::{
User,
RegisteredUser,
UserManagerError,
user::NotSignedInUser,
};
/// Import this trait to use [`add_um_routes()`](Self::add_um_routes())
pub trait UserManagementRoutes: private::Sealed {
/// Add pre-configured routes to the serve to handle authentication
///
/// Specifically, the following routes are added:
/// * `/account`, the main settings & login page
/// * `/account/askcert`, a page which always prompts for a certificate
/// * `/account/register`, for users to register a new account
/// * `/account/login`, for users to link their certificate to an existing account
/// * `/account/password`, to change the user's password
///
/// If this method is used, no more routes should be added under `/account`. If you
/// would like to direct a user to login from your application, you should send them
/// to `/account`, which will start the login/registration flow.
///
/// The `redir` argument allows you to specify the point that users will be directed
/// to return to once their account has been created.
fn add_um_routes<UserData: Serialize + DeserializeOwned + Default + 'static>(self) -> Self;
/// Add a special route that requires users to be logged in
///
/// In addition to the normal [`Request`], your handler will recieve a copy of the
/// [`RegisteredUser`] for the current user. If a user tries to connect to the page
/// without logging in, they will be prompted to register or link an account.
///
/// To use this method, ensure that [`add_um_routes()`](Self::add_um_routes()) has
/// also been called.
fn add_authenticated_route<UserData, Handler, F>(
self,
path: &'static str,
handler: Handler,
) -> Self
where
UserData: Serialize + DeserializeOwned + 'static + Send + Sync,
Handler: Clone + Send + Sync + 'static + Fn(Request, RegisteredUser<UserData>) -> F,
F: Send + Sync + 'static + Future<Output = Result<Response>>;
/// Add a special route that requires users to be logged in AND takes input
///
/// Like with [`add_authenticated_route()`](Self::add_authenticated_route()), this
/// prompts the user to log in if they haven't already, but additionally prompts the
/// user for input before running the handler with both the user object and the input
/// they provided.
///
/// To a user, this might look something like this:
/// * Click a link to `/your/route`
/// * See a screen asking you to sign in or create an account
/// * Create a new account, and return to the app.
/// * Now, clicking the link shows the prompt provided.
/// * After entering some value, the user receives the response from the handler.
///
/// For a user whose already logged in, this will just look like a normal input route,
/// where they enter some query and see a page. This method just takes the burden of
/// having to check if the user sent a query string and respond with an INPUT response
/// if not.
///
/// To use this method, ensure that [`add_um_routes()`](Self::add_um_routes()) has
/// also been called.
fn add_authenticated_input_route<UserData, Handler, F>(
self,
path: &'static str,
prompt: &'static str,
handler: Handler,
) -> Self
where
UserData: Serialize + DeserializeOwned + 'static + Send + Sync,
Handler: Clone + Send + Sync + 'static + Fn(Request, RegisteredUser<UserData>, String) -> F,
F: Send + Sync + 'static + Future<Output = Result<Response>>;
}
impl UserManagementRoutes for crate::Server {
/// Add pre-configured routes to the serve to handle authentication
///
/// See [`UserManagementRoutes::add_um_routes()`]
fn add_um_routes<UserData: Serialize + DeserializeOwned + Default + 'static>(self) -> Self {
let clients_page = Response::success_gemini(include_str!("pages/clients.gmi"));
#[allow(unused_mut)]
let mut modified_self = self.add_route("/account", handle_base::<UserData>)
.add_route("/account/askcert", handle_ask_cert::<UserData>)
.add_route("/account/register", handle_register::<UserData>)
.add_route("/account/clients", clients_page);
#[cfg(feature = "user_management_advanced")] {
modified_self = modified_self
.add_route("/account/login", handle_login::<UserData>)
.add_route("/account/password", handle_password::<UserData>);
}
modified_self
}
/// Add a special route that requires users to be logged in
///
/// See [`UserManagementRoutes::add_authenticated_route()`]
fn add_authenticated_route<UserData, Handler, F>(
self,
path: &'static str,
handler: Handler,
) -> Self
where
UserData: Serialize + DeserializeOwned + 'static + Send + Sync,
Handler: Clone + Send + Sync + 'static + Fn(Request, RegisteredUser<UserData>) -> F,
F: Send + Sync + 'static + Future<Output = Result<Response>>
{
self.add_route(path, move|request: Request| {
let handler = handler.clone();
async move {
let segments = request.path_segments();
let segments = segments.iter().map(String::as_ref).collect::<Vec<&str>>();
Ok(match request.user::<UserData>()? {
User::Unauthenticated => {
render_unauth_page(segments)
},
User::NotSignedIn(user) => {
save_redirect(&user, segments);
Response::success_gemini(NSI)
},
User::SignedIn(user) => {
(handler)(request, user).await?
},
})
}
})
}
/// Add a special route that requires users to be logged in AND takes input
///
/// See [`UserManagementRoutes::add_authenticated_input_route()`]
fn add_authenticated_input_route<UserData, Handler, F>(
self,
path: &'static str,
prompt: &'static str,
handler: Handler,
) -> Self
where
UserData: Serialize + DeserializeOwned + 'static + Send + Sync,
Handler: Clone + Send + Sync + 'static + Fn(Request, RegisteredUser<UserData>, String) -> F,
F: Send + Sync + 'static + Future<Output = Result<Response>>
{
self.add_authenticated_route(path, move|request, user| {
let handler = handler.clone();
async move {
if let Some(input) = request.input().map(str::to_owned) {
(handler.clone())(request, user, input).await
} else {
Ok(Response::input(prompt))
}
}
})
}
}
#[cfg(feature = "user_management_advanced")]
const NSI: &str = include_str!("pages/nsi.gmi");
#[cfg(not(feature = "user_management_advanced"))]
const NSI: &str = include_str!("pages/nopass/nsi.gmi");
// TODO periodically clean these
#[cfg(feature = "dashmap")]
lazy_static::lazy_static! {
static ref PENDING_REDIRECTS: DashMap<[u8; 32], String> = Default::default();
}
#[cfg(not(feature = "dashmap"))]
lazy_static::lazy_static! {
static ref PENDING_REDIRECTS: RwLock<HashMap<[u8; 32], String>> = Default::default();
}
async fn handle_base<UserData: Serialize + DeserializeOwned>(request: Request) -> Result<Response> {
let segments = request.trailing_segments().iter().map(String::as_str).collect::<Vec<&str>>();
Ok(match request.user::<UserData>()? {
User::Unauthenticated => {
render_unauth_page(segments)
},
User::NotSignedIn(usr) => {
save_redirect(&usr, segments);
Response::success_gemini(NSI)
},
User::SignedIn(user) => {
render_settings_menu(user)
},
})
}
async fn handle_ask_cert<UserData: Serialize + DeserializeOwned>(request: Request) -> Result<Response> {
Ok(match request.user::<UserData>()? {
User::Unauthenticated => {
Response::client_certificate_required("Please select a client certificate to proceed.")
},
User::NotSignedIn(nsi) => {
let segments = request.trailing_segments().iter().map(String::as_str).collect::<Vec<&str>>();
save_redirect(&nsi, segments);
#[cfg(feature = "user_management_advanced")] {
Response::success_gemini(include_str!("pages/askcert/success.gmi"))
}
#[cfg(not(feature = "user_management_advanced"))] {
Response::success_gemini(include_str!("pages/nopass/askcert/success.gmi"))
}
},
User::SignedIn(user) => {
Response::success_gemini(format!(
include_str!("pages/askcert/exists.gmi"),
username = user.username(),
redirect = get_redirect(&user),
))
},
})
}
async fn handle_register<UserData: Serialize + DeserializeOwned + Default>(request: Request) -> Result<Response> {
Ok(match request.user::<UserData>()? {
User::Unauthenticated => {
render_unauth_page(&[""])
},
User::NotSignedIn(nsi) => {
if let Some(username) = request.input() {
match nsi.register::<UserData>(username.to_owned()) {
Err(UserManagerError::UsernameNotUnique) => {
#[cfg(feature = "user_management_advanced")] {
Response::success_gemini(format!(
include_str!("pages/register/exists.gmi"),
username = username,
))
}
#[cfg(not(feature = "user_management_advanced"))] {
Response::success_gemini(format!(
include_str!("pages/register/exists.gmi"),
username = username,
))
}
},
Ok(user) => {
#[cfg(feature = "user_management_advanced")] {
Response::success_gemini(format!(
include_str!("pages/register/success.gmi"),
username = username,
redirect = get_redirect(&user),
))
}
#[cfg(not(feature = "user_management_advanced"))] {
Response::success_gemini(format!(
include_str!("pages/nopass/register/success.gmi"),
username = username,
redirect = get_redirect(&user),
))
}
},
Err(e) => return Err(e.into())
}
} else {
Response::input("Please pick a username")
}
},
User::SignedIn(user) => {
render_settings_menu(user)
},
})
}
#[cfg(feature = "user_management_advanced")]
async fn handle_login<UserData: Serialize + DeserializeOwned + Default>(request: Request) -> Result<Response> {
Ok(match request.user::<UserData>()? {
User::Unauthenticated => {
render_unauth_page(&[""])
},
User::NotSignedIn(nsi) => {
if let Some(username) = request.trailing_segments().get(0) {
if let Some(password) = request.input() {
match nsi.attach::<UserData>(username, Some(password.as_bytes())) {
Err(UserManagerError::PasswordNotSet) | Ok(None) => {
Response::success_gemini(format!(
include_str!("pages/login/wrong.gmi"),
username = username,
))
},
Ok(Some(user)) => {
Response::success_gemini(format!(
include_str!("pages/login/success.gmi"),
username = username,
redirect = get_redirect(&user),
))
},
Err(e) => return Err(e.into()),
}
} else {
Response::sensitive_input("Please enter your password")
}
} else if let Some(username) = request.input() {
Response::redirect_temporary(
format!("/account/login/{}", username).as_str()
)
} else {
Response::input("Please enter your username")
}
},
User::SignedIn(user) => {
render_settings_menu(user)
},
})
}
#[cfg(feature = "user_management_advanced")]
async fn handle_password<UserData: Serialize + DeserializeOwned + Default>(request: Request) -> Result<Response> {
Ok(match request.user::<UserData>()? {
User::Unauthenticated => {
render_unauth_page(&[""])
},
User::NotSignedIn(nsi) => {
save_redirect(&nsi, &[""]);
Response::success_gemini(NSI)
},
User::SignedIn(mut user) => {
if let Some(password) = request.input() {
user.set_password(password)?;
Response::success_gemini(include_str!("pages/password/success.gmi"))
} else {
Response::sensitive_input(
format!("Please enter a {}password",
if user.has_password() {
"new "
} else {
""
}
)
)
}
},
})
}
fn render_settings_menu<UserData: Serialize + DeserializeOwned>(
user: RegisteredUser<UserData>
) -> Response {
let mut document = Document::new();
document
.add_heading(HeadingLevel::H1, "User Settings")
.add_blank_line()
.add_text(&format!("Welcome {}!", user.username()))
.add_blank_line()
.add_link(get_redirect(&user).as_str(), "Back to the app")
.add_blank_line();
#[cfg(feature = "user_management_advanced")]
document
.add_text(
if user.has_password() {
concat!(
"You currently have a password set. This can be used to link any new",
" certificates or clients to your account. If you don't remember your",
" password, or would like to change it, you may do so here.",
)
} else {
concat!(
"You don't currently have a password set! Without a password, you cannot",
" link any new certificates to your account, and if you lose your current",
" client or certificate, you won't be able to recover your account.",
)
}
)
.add_blank_line()
.add_link("/account/password", if user.has_password() { "Change password" } else { "Set password" });
document.into()
}
fn render_unauth_page<'a>(
redirect: impl AsRef<[&'a str]>,
) -> Response {
Response::success_gemini(format!(
include_str!("pages/unauth.gmi"),
redirect = redirect.as_ref().join("/"),
))
}
fn save_redirect<'a>(
user: &NotSignedInUser,
redirect: impl AsRef<[&'a str]>,
) {
let mut redirect = redirect.as_ref().join("/");
redirect.insert(0, '/');
if redirect.len() > 1 {
#[cfg(feature = "dashmap")]
let ref_to_map = &*PENDING_REDIRECTS;
#[cfg(not(feature = "dashmap"))]
let mut ref_to_map = PENDING_REDIRECTS.write().unwrap();
debug!("Added \"{}\" as redirect for cert {:x?}", redirect, &user.certificate);
ref_to_map.insert(user.certificate, redirect);
}
}
fn get_redirect<T: Serialize + DeserializeOwned>(user: &RegisteredUser<T>) -> String {
let cert = user.active_certificate().unwrap();
#[cfg(feature = "dashmap")]
let maybe_redir = PENDING_REDIRECTS.get(cert).map(|r| r.clone());
#[cfg(not(feature = "dashmap"))]
let ref_to_map = PENDING_REDIRECTS.read().unwrap();
#[cfg(not(feature = "dashmap"))]
let maybe_redir = ref_to_map.get(cert).cloned();
let redirect = maybe_redir.unwrap_or_else(||"/".to_string());
debug!("Accessed redirect to \"{}\" for cert {:x?}", redirect, cert);
redirect
}
mod private {
pub trait Sealed {}
impl Sealed for crate::Server {}
}