1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
// Copyright 2024 New Vector Ltd.
// Copyright 2021-2024 The Matrix.org Foundation C.I.C.
//
// SPDX-License-Identifier: AGPL-3.0-only
// Please see LICENSE in the repository root for full details.

#![deny(clippy::future_not_send)]
#![allow(
    // Some axum handlers need that
    clippy::unused_async,
    // Because of how axum handlers work, we sometime have take many arguments
    clippy::too_many_arguments,
    // Code generated by tracing::instrument trigger this when returning an `impl Trait`
    // See https://github.com/tokio-rs/tracing/issues/2613
    clippy::let_with_type_underscore,
)]

use std::{convert::Infallible, time::Duration};

use axum::{
    extract::{FromRef, FromRequestParts, OriginalUri, RawQuery, State},
    http::Method,
    response::{Html, IntoResponse},
    routing::{get, post},
    Extension, Router,
};
use graphql::ExtraRouterParameters;
use headers::HeaderName;
use hyper::{
    header::{
        ACCEPT, ACCEPT_LANGUAGE, AUTHORIZATION, CONTENT_LANGUAGE, CONTENT_LENGTH, CONTENT_TYPE,
    },
    StatusCode, Version,
};
use mas_axum_utils::{cookies::CookieJar, FancyError};
use mas_data_model::SiteConfig;
use mas_http::CorsLayerExt;
use mas_keystore::{Encrypter, Keystore};
use mas_matrix::BoxHomeserverConnection;
use mas_policy::Policy;
use mas_router::{Route, UrlBuilder};
use mas_storage::{BoxClock, BoxRepository, BoxRng};
use mas_templates::{ErrorContext, NotFoundContext, TemplateContext, Templates};
use passwords::PasswordManager;
use sqlx::PgPool;
use tower::util::AndThenLayer;
use tower_http::cors::{Any, CorsLayer};

mod admin;
mod compat;
mod graphql;
mod health;
mod oauth2;
pub mod passwords;
pub mod upstream_oauth2;
mod views;

mod activity_tracker;
mod captcha;
mod preferred_language;
mod rate_limit;
#[cfg(test)]
mod test_utils;

/// Implement `From<E>` for `RouteError`, for "internal server error" kind of
/// errors.
#[macro_export]
macro_rules! impl_from_error_for_route {
    ($route_error:ty : $error:ty) => {
        impl From<$error> for $route_error {
            fn from(e: $error) -> Self {
                Self::Internal(Box::new(e))
            }
        }
    };
    ($error:ty) => {
        impl_from_error_for_route!(self::RouteError: $error);
    };
}

pub use mas_axum_utils::{cookies::CookieManager, ErrorWrapper};

pub use self::{
    activity_tracker::{ActivityTracker, Bound as BoundActivityTracker},
    admin::router as admin_api_router,
    graphql::{
        schema as graphql_schema, schema_builder as graphql_schema_builder, Schema as GraphQLSchema,
    },
    preferred_language::PreferredLanguage,
    rate_limit::{Limiter, RequesterFingerprint},
    upstream_oauth2::cache::MetadataCache,
};

pub fn healthcheck_router<S>() -> Router<S>
where
    S: Clone + Send + Sync + 'static,
    PgPool: FromRef<S>,
{
    Router::new().route(mas_router::Healthcheck::route(), get(self::health::get))
}

pub fn graphql_router<S>(playground: bool, undocumented_oauth2_access: bool) -> Router<S>
where
    S: Clone + Send + Sync + 'static,
    graphql::Schema: FromRef<S>,
    BoundActivityTracker: FromRequestParts<S>,
    BoxRepository: FromRequestParts<S>,
    BoxClock: FromRequestParts<S>,
    Encrypter: FromRef<S>,
    CookieJar: FromRequestParts<S>,
{
    let mut router = Router::new()
        .route(
            mas_router::GraphQL::route(),
            get(self::graphql::get).post(self::graphql::post),
        )
        // Pass the undocumented_oauth2_access parameter through the request extension, as it is
        // per-listener
        .layer(Extension(ExtraRouterParameters {
            undocumented_oauth2_access,
        }))
        .layer(
            CorsLayer::new()
                .allow_origin(Any)
                .allow_methods(Any)
                .allow_otel_headers([
                    AUTHORIZATION,
                    ACCEPT,
                    ACCEPT_LANGUAGE,
                    CONTENT_LANGUAGE,
                    CONTENT_TYPE,
                ]),
        );

    if playground {
        router = router.route(
            mas_router::GraphQLPlayground::route(),
            get(self::graphql::playground),
        );
    }

    router
}

pub fn discovery_router<S>() -> Router<S>
where
    S: Clone + Send + Sync + 'static,
    Keystore: FromRef<S>,
    SiteConfig: FromRef<S>,
    UrlBuilder: FromRef<S>,
    BoxClock: FromRequestParts<S>,
    BoxRng: FromRequestParts<S>,
{
    Router::new()
        .route(
            mas_router::OidcConfiguration::route(),
            get(self::oauth2::discovery::get),
        )
        .route(
            mas_router::Webfinger::route(),
            get(self::oauth2::webfinger::get),
        )
        .layer(
            CorsLayer::new()
                .allow_origin(Any)
                .allow_methods(Any)
                .allow_otel_headers([
                    AUTHORIZATION,
                    ACCEPT,
                    ACCEPT_LANGUAGE,
                    CONTENT_LANGUAGE,
                    CONTENT_TYPE,
                ])
                .max_age(Duration::from_secs(60 * 60)),
        )
}

pub fn api_router<S>() -> Router<S>
where
    S: Clone + Send + Sync + 'static,
    Keystore: FromRef<S>,
    UrlBuilder: FromRef<S>,
    BoxRepository: FromRequestParts<S>,
    ActivityTracker: FromRequestParts<S>,
    BoundActivityTracker: FromRequestParts<S>,
    Encrypter: FromRef<S>,
    reqwest::Client: FromRef<S>,
    SiteConfig: FromRef<S>,
    BoxHomeserverConnection: FromRef<S>,
    BoxClock: FromRequestParts<S>,
    BoxRng: FromRequestParts<S>,
    Policy: FromRequestParts<S>,
{
    // All those routes are API-like, with a common CORS layer
    Router::new()
        .route(
            mas_router::OAuth2Keys::route(),
            get(self::oauth2::keys::get),
        )
        .route(
            mas_router::OidcUserinfo::route(),
            get(self::oauth2::userinfo::get).post(self::oauth2::userinfo::get),
        )
        .route(
            mas_router::OAuth2Introspection::route(),
            post(self::oauth2::introspection::post),
        )
        .route(
            mas_router::OAuth2Revocation::route(),
            post(self::oauth2::revoke::post),
        )
        .route(
            mas_router::OAuth2TokenEndpoint::route(),
            post(self::oauth2::token::post),
        )
        .route(
            mas_router::OAuth2RegistrationEndpoint::route(),
            post(self::oauth2::registration::post),
        )
        .route(
            mas_router::OAuth2DeviceAuthorizationEndpoint::route(),
            post(self::oauth2::device::authorize::post),
        )
        .layer(
            CorsLayer::new()
                .allow_origin(Any)
                .allow_methods(Any)
                .allow_otel_headers([
                    AUTHORIZATION,
                    ACCEPT,
                    ACCEPT_LANGUAGE,
                    CONTENT_LANGUAGE,
                    CONTENT_TYPE,
                ])
                .max_age(Duration::from_secs(60 * 60)),
        )
}

#[allow(clippy::trait_duplication_in_bounds)]
pub fn compat_router<S>() -> Router<S>
where
    S: Clone + Send + Sync + 'static,
    UrlBuilder: FromRef<S>,
    SiteConfig: FromRef<S>,
    BoxHomeserverConnection: FromRef<S>,
    PasswordManager: FromRef<S>,
    Limiter: FromRef<S>,
    BoundActivityTracker: FromRequestParts<S>,
    RequesterFingerprint: FromRequestParts<S>,
    BoxRepository: FromRequestParts<S>,
    BoxClock: FromRequestParts<S>,
    BoxRng: FromRequestParts<S>,
{
    Router::new()
        .route(
            mas_router::CompatLogin::route(),
            get(self::compat::login::get).post(self::compat::login::post),
        )
        .route(
            mas_router::CompatLogout::route(),
            post(self::compat::logout::post),
        )
        .route(
            mas_router::CompatRefresh::route(),
            post(self::compat::refresh::post),
        )
        .route(
            mas_router::CompatLoginSsoRedirect::route(),
            get(self::compat::login_sso_redirect::get),
        )
        .route(
            mas_router::CompatLoginSsoRedirectIdp::route(),
            get(self::compat::login_sso_redirect::get),
        )
        .route(
            mas_router::CompatLoginSsoRedirectSlash::route(),
            get(self::compat::login_sso_redirect::get),
        )
        .layer(
            CorsLayer::new()
                .allow_origin(Any)
                .allow_methods(Any)
                .allow_otel_headers([
                    AUTHORIZATION,
                    ACCEPT,
                    ACCEPT_LANGUAGE,
                    CONTENT_LANGUAGE,
                    CONTENT_TYPE,
                    HeaderName::from_static("x-requested-with"),
                ])
                .max_age(Duration::from_secs(60 * 60)),
        )
}

#[allow(clippy::too_many_lines)]
pub fn human_router<S>(templates: Templates) -> Router<S>
where
    S: Clone + Send + Sync + 'static,
    UrlBuilder: FromRef<S>,
    PreferredLanguage: FromRequestParts<S>,
    BoxRepository: FromRequestParts<S>,
    CookieJar: FromRequestParts<S>,
    BoundActivityTracker: FromRequestParts<S>,
    RequesterFingerprint: FromRequestParts<S>,
    Encrypter: FromRef<S>,
    Templates: FromRef<S>,
    Keystore: FromRef<S>,
    PasswordManager: FromRef<S>,
    MetadataCache: FromRef<S>,
    SiteConfig: FromRef<S>,
    Limiter: FromRef<S>,
    reqwest::Client: FromRef<S>,
    BoxHomeserverConnection: FromRef<S>,
    BoxClock: FromRequestParts<S>,
    BoxRng: FromRequestParts<S>,
    Policy: FromRequestParts<S>,
{
    Router::new()
        // XXX: hard-coded redirect from /account to /account/
        .route(
            "/account",
            get(
                |State(url_builder): State<UrlBuilder>, RawQuery(query): RawQuery| async move {
                    let prefix = url_builder.prefix().unwrap_or_default();
                    let route = mas_router::Account::route();
                    let destination = if let Some(query) = query {
                        format!("{prefix}{route}?{query}")
                    } else {
                        format!("{prefix}{route}")
                    };

                    axum::response::Redirect::to(&destination)
                },
            ),
        )
        .route(mas_router::Account::route(), get(self::views::app::get))
        .route(
            mas_router::AccountWildcard::route(),
            get(self::views::app::get),
        )
        .route(
            mas_router::AccountRecoveryFinish::route(),
            get(self::views::app::get_anonymous),
        )
        .route(
            mas_router::ChangePasswordDiscovery::route(),
            get(|State(url_builder): State<UrlBuilder>| async move {
                url_builder.redirect(&mas_router::AccountPasswordChange)
            }),
        )
        .route(mas_router::Index::route(), get(self::views::index::get))
        .route(
            mas_router::Login::route(),
            get(self::views::login::get).post(self::views::login::post),
        )
        .route(mas_router::Logout::route(), post(self::views::logout::post))
        .route(
            mas_router::Reauth::route(),
            get(self::views::reauth::get).post(self::views::reauth::post),
        )
        .route(
            mas_router::Register::route(),
            get(self::views::register::get).post(self::views::register::post),
        )
        .route(
            mas_router::AccountVerifyEmail::route(),
            get(self::views::account::emails::verify::get)
                .post(self::views::account::emails::verify::post),
        )
        .route(
            mas_router::AccountAddEmail::route(),
            get(self::views::account::emails::add::get)
                .post(self::views::account::emails::add::post),
        )
        .route(
            mas_router::AccountRecoveryStart::route(),
            get(self::views::recovery::start::get).post(self::views::recovery::start::post),
        )
        .route(
            mas_router::AccountRecoveryProgress::route(),
            get(self::views::recovery::progress::get).post(self::views::recovery::progress::post),
        )
        .route(
            mas_router::OAuth2AuthorizationEndpoint::route(),
            get(self::oauth2::authorization::get),
        )
        .route(
            mas_router::ContinueAuthorizationGrant::route(),
            get(self::oauth2::authorization::complete::get),
        )
        .route(
            mas_router::Consent::route(),
            get(self::oauth2::consent::get).post(self::oauth2::consent::post),
        )
        .route(
            mas_router::CompatLoginSsoComplete::route(),
            get(self::compat::login_sso_complete::get).post(self::compat::login_sso_complete::post),
        )
        .route(
            mas_router::UpstreamOAuth2Authorize::route(),
            get(self::upstream_oauth2::authorize::get),
        )
        .route(
            mas_router::UpstreamOAuth2Callback::route(),
            get(self::upstream_oauth2::callback::handler)
                .post(self::upstream_oauth2::callback::handler),
        )
        .route(
            mas_router::UpstreamOAuth2Link::route(),
            get(self::upstream_oauth2::link::get).post(self::upstream_oauth2::link::post),
        )
        .route(
            mas_router::DeviceCodeLink::route(),
            get(self::oauth2::device::link::get),
        )
        .route(
            mas_router::DeviceCodeConsent::route(),
            get(self::oauth2::device::consent::get).post(self::oauth2::device::consent::post),
        )
        .layer(AndThenLayer::new(
            move |response: axum::response::Response| async move {
                if response.status().is_server_error() {
                    // Error responses should have an ErrorContext attached to them
                    let ext = response.extensions().get::<ErrorContext>();
                    if let Some(ctx) = ext {
                        if let Ok(res) = templates.render_error(ctx) {
                            let (mut parts, _original_body) = response.into_parts();
                            parts.headers.remove(CONTENT_TYPE);
                            parts.headers.remove(CONTENT_LENGTH);
                            return Ok((parts, Html(res)).into_response());
                        }
                    }
                }

                Ok::<_, Infallible>(response)
            },
        ))
}

/// The fallback handler for all routes that don't match anything else.
///
/// # Errors
///
/// Returns an error if the template rendering fails.
pub async fn fallback(
    State(templates): State<Templates>,
    OriginalUri(uri): OriginalUri,
    method: Method,
    version: Version,
    PreferredLanguage(locale): PreferredLanguage,
) -> Result<impl IntoResponse, FancyError> {
    let ctx = NotFoundContext::new(&method, version, &uri).with_language(locale);
    // XXX: this should look at the Accept header and return JSON if requested

    let res = templates.render_not_found(&ctx)?;

    Ok((StatusCode::NOT_FOUND, Html(res)))
}