fix(desktop): support self-signed remote HTTPS windows

Route remote windows through a trusted local HTTPS proxy so WebView2 accepts secure cookies with self-signed servers. Preserve remote base paths, rewrite origin headers for proxied requests, and keep the certificate helper buildable outside Windows.
This commit is contained in:
Pascal André
2026-04-12 02:20:06 +02:00
parent a795869064
commit adcaf3a116
6 changed files with 3991 additions and 28 deletions

View File

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"tracing-core",
@@ -4691,6 +5171,12 @@ version = "0.2.11"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "673aac59facbab8a9007c7f6108d11f63b603f7cabff99fabf650fea5c32b861"
[[package]]
name = "untrusted"
version = "0.9.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "8ecb6da28b8a351d773b68d5825ac39017e680750f980f3a1a85cd8dd28a47c1"
[[package]]
name = "url"
version = "2.5.8"
@@ -4902,6 +5388,19 @@ dependencies = [
"wasmparser",
]
[[package]]
name = "wasm-streams"
version = "0.4.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "15053d8d85c7eccdbefef60f06769760a563c7f0a9d6902a13d35c7800b0ad65"
dependencies = [
"futures-util",
"js-sys",
"wasm-bindgen",
"wasm-bindgen-futures",
"web-sys",
]
[[package]]
name = "wasm-streams"
version = "0.5.0"
@@ -4937,6 +5436,16 @@ dependencies = [
"wasm-bindgen",
]
[[package]]
name = "web-time"
version = "1.1.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "5a6580f308b1fad9207618087a65c04e7a10bc77e02c8e84e9b00dd4b12fa0bb"
dependencies = [
"js-sys",
"wasm-bindgen",
]
[[package]]
name = "web_atoms"
version = "0.2.3"
@@ -4993,6 +5502,15 @@ dependencies = [
"system-deps",
]
[[package]]
name = "webpki-roots"
version = "1.0.6"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "22cfaf3c063993ff62e73cb4311efde4db1efb31ab78a3e5c457939ad5cc0bed"
dependencies = [
"rustls-pki-types",
]
[[package]]
name = "webview2-com"
version = "0.38.2"
@@ -5286,6 +5804,15 @@ dependencies = [
"windows-targets 0.48.5",
]
[[package]]
name = "windows-sys"
version = "0.52.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "282be5f36a8ce781fad8c8ae18fa3f9beff57ec1b52cb3de0789201425d9a33d"
dependencies = [
"windows-targets 0.52.6",
]
[[package]]
name = "windows-sys"
version = "0.59.0"
@@ -5802,6 +6329,15 @@ version = "0.2.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "b9cc00251562a284751c9973bace760d86c0276c471b4be569fe6b068ee97a56"
[[package]]
name = "yasna"
version = "0.5.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "e17bb3549cc1321ae1296b9cdc2698e2b6cb1992adfa19a8c72e5b7a738f44cd"
dependencies = [
"time",
]
[[package]]
name = "yoke"
version = "0.8.1"
@@ -5927,6 +6463,12 @@ dependencies = [
"synstructure",
]
[[package]]
name = "zeroize"
version = "1.8.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "b97154e67e32c85465826e8bcc1c59429aaaf107c1e4a9e53c8d8ccd5eff88d0"
[[package]]
name = "zerotrie"
version = "0.2.3"

View File

@@ -12,11 +12,20 @@ tauri = { version = "2.5.2", features = [ "devtools"] }
serde = { version = "1", features = ["derive"] }
serde_json = "1"
serde_yaml = "0.9"
axum = "0.7"
axum-server = { version = "0.7", features = ["tls-rustls"] }
bytes = "1"
futures-util = "0.3"
rcgen = "0.13"
rustls = { version = "0.23", features = ["ring"] }
reqwest = { version = "0.12", default-features = false, features = ["http2", "charset", "json", "stream", "rustls-tls"] }
rand = "0.8"
regex = "1"
once_cell = "1"
parking_lot = "0.12"
thiserror = "1"
anyhow = "1"
tokio = { version = "1", features = ["macros", "rt-multi-thread", "net", "sync"] }
which = "4"
libc = "0.2"
keepawake = "0.6"
@@ -28,4 +37,4 @@ url = "2"
tauri-plugin-notification = "2"
[target.'cfg(windows)'.dependencies]
windows-sys = { version = "0.59", features = ["Win32_Foundation", "Win32_UI_Shell", "Win32_Security", "Win32_System_JobObjects"] }
windows-sys = { version = "0.59", features = ["Win32_Foundation", "Win32_Security_Cryptography", "Win32_UI_Shell", "Win32_Security", "Win32_System_JobObjects"] }

File diff suppressed because it is too large Load Diff

View File

@@ -0,0 +1,167 @@
use rcgen::{CertificateParams, DnType, KeyPair, SanType};
use std::fs;
use std::path::PathBuf;
use std::time::Duration;
const CERT_DIR_NAME: &str = "proxy-certs";
const CERT_PEM_FILE: &str = "proxy.crt";
const KEY_PEM_FILE: &str = "proxy.key";
const CERT_DER_FILE: &str = "proxy.der";
const TRUSTED_MARKER: &str = ".trusted";
#[cfg(windows)]
const WINDOWS_APP_USER_MODEL_ID: &str = "ai.neuralnomads.codenomad.client";
/// Holds PEM-encoded certificate and private key for the local HTTPS proxy.
pub struct LocalCert {
pub cert_pem: String,
pub key_pem: String,
pub cert_der: Vec<u8>,
}
/// Returns the directory where proxy certificates are stored.
fn cert_dir() -> Result<PathBuf, String> {
let base = dirs::data_local_dir()
.ok_or_else(|| "Cannot determine local app data directory".to_string())?;
#[cfg(windows)]
{
return Ok(base.join(WINDOWS_APP_USER_MODEL_ID).join(CERT_DIR_NAME));
}
#[cfg(not(windows))]
{
Ok(base.join("codenomad").join(CERT_DIR_NAME))
}
}
/// Ensures a self-signed certificate exists on disk, generating one if needed.
/// Returns the PEM cert, PEM key, and DER cert bytes.
pub fn ensure_local_cert() -> Result<LocalCert, String> {
let dir = cert_dir()?;
let cert_pem_path = dir.join(CERT_PEM_FILE);
let key_pem_path = dir.join(KEY_PEM_FILE);
let cert_der_path = dir.join(CERT_DER_FILE);
// If all files exist, load from disk
if cert_pem_path.exists() && key_pem_path.exists() && cert_der_path.exists() {
let cert_pem = fs::read_to_string(&cert_pem_path)
.map_err(|e| format!("Failed to read {}: {e}", cert_pem_path.display()))?;
let key_pem = fs::read_to_string(&key_pem_path)
.map_err(|e| format!("Failed to read {}: {e}", key_pem_path.display()))?;
let cert_der = fs::read(&cert_der_path)
.map_err(|e| format!("Failed to read {}: {e}", cert_der_path.display()))?;
return Ok(LocalCert {
cert_pem,
key_pem,
cert_der,
});
}
// Generate a new self-signed certificate
fs::create_dir_all(&dir)
.map_err(|e| format!("Failed to create cert dir {}: {e}", dir.display()))?;
let mut params = CertificateParams::default();
params
.distinguished_name
.push(DnType::CommonName, "CodeNomad Local Proxy");
params.subject_alt_names = vec![
SanType::DnsName("localhost".try_into().map_err(|e| format!("{e}"))?),
SanType::IpAddress(std::net::IpAddr::V4(std::net::Ipv4Addr::LOCALHOST)),
];
// Valid for 10 years
params.not_before = rcgen::date_time_ymd(2024, 1, 1);
let ten_years = Duration::from_secs(10 * 365 * 24 * 3600);
params.not_after = params.not_before + ten_years;
let key_pair = KeyPair::generate().map_err(|e| format!("Key generation failed: {e}"))?;
let cert = params
.self_signed(&key_pair)
.map_err(|e| format!("Certificate generation failed: {e}"))?;
let cert_pem = cert.pem();
let key_pem = key_pair.serialize_pem();
let cert_der = cert.der().to_vec();
fs::write(&cert_pem_path, &cert_pem)
.map_err(|e| format!("Failed to write {}: {e}", cert_pem_path.display()))?;
fs::write(&key_pem_path, &key_pem)
.map_err(|e| format!("Failed to write {}: {e}", key_pem_path.display()))?;
fs::write(&cert_der_path, &cert_der)
.map_err(|e| format!("Failed to write {}: {e}", cert_der_path.display()))?;
// Remove the trusted marker since this is a new cert
let marker = dir.join(TRUSTED_MARKER);
let _ = fs::remove_file(&marker);
Ok(LocalCert {
cert_pem,
key_pem,
cert_der,
})
}
/// Returns true if the certificate has already been added to the Windows trust
/// store (indicated by the `.trusted` marker file).
pub fn is_cert_trusted() -> bool {
cert_dir()
.map(|dir| dir.join(TRUSTED_MARKER).exists())
.unwrap_or(false)
}
/// Adds the DER-encoded certificate to the Windows `CurrentUser\Root` store.
/// This will show a one-time Windows security confirmation dialog.
/// After success, writes a `.trusted` marker file to avoid re-prompting.
#[cfg(windows)]
pub fn trust_cert_in_store(cert_der: &[u8]) -> Result<(), String> {
use windows_sys::Win32::Security::Cryptography::{
CertAddEncodedCertificateToStore, CertCloseStore, CertOpenSystemStoreW,
CERT_STORE_ADD_REPLACE_EXISTING, PKCS_7_ASN_ENCODING, X509_ASN_ENCODING,
};
if is_cert_trusted() {
return Ok(());
}
// "Root" in UTF-16
let store_name: Vec<u16> = "Root\0".encode_utf16().collect();
unsafe {
let store = CertOpenSystemStoreW(0, store_name.as_ptr());
if store.is_null() {
return Err("Failed to open CurrentUser\\Root certificate store".into());
}
let encoding = X509_ASN_ENCODING | PKCS_7_ASN_ENCODING;
let result = CertAddEncodedCertificateToStore(
store,
encoding,
cert_der.as_ptr(),
cert_der.len() as u32,
CERT_STORE_ADD_REPLACE_EXISTING,
std::ptr::null_mut(),
);
CertCloseStore(store, 0);
if result == 0 {
return Err("Failed to add certificate to trust store. \
The user may have declined the security dialog."
.into());
}
}
// Write marker file
let dir = cert_dir()?;
fs::write(dir.join(TRUSTED_MARKER), "trusted")
.map_err(|e| format!("Failed to write trust marker: {e}"))?;
Ok(())
}
#[cfg(not(windows))]
pub fn trust_cert_in_store(_cert_der: &[u8]) -> Result<(), String> {
// On non-Windows platforms, certificate trust is not yet implemented.
// The proxy will still work but the browser may show a warning.
Ok(())
}

View File

@@ -1,9 +1,12 @@
#![cfg_attr(not(debug_assertions), windows_subsystem = "windows")]
mod cert_manager;
mod cli_manager;
mod remote_proxy;
use cli_manager::{CliProcessManager, CliStatus};
use keepawake::KeepAwake;
use remote_proxy::{start_remote_proxy, ProxyTlsConfig, RemoteProxyHandle};
use serde::Deserialize;
use serde_json::json;
use std::collections::HashMap;
@@ -45,6 +48,7 @@ pub struct AppState {
pub wake_lock: Mutex<Option<KeepAwake>>,
pub zoom_level: Mutex<f64>,
pub remote_origins: Mutex<HashMap<String, String>>,
pub remote_proxies: Mutex<HashMap<String, RemoteProxyHandle>>,
}
#[derive(Debug, Deserialize)]
@@ -119,7 +123,7 @@ fn is_dev_mode() -> bool {
fn should_allow_internal(url: &Url) -> bool {
match url.scheme() {
"tauri" | "asset" | "file" => true,
"tauri" | "asset" | "file" | "about" => true,
// On Windows/WebView2, Tauri serves the app assets from `tauri.localhost`.
// This must be treated as an internal origin or the navigation guard will
// redirect it to the system browser and the app will appear blank.
@@ -167,15 +171,11 @@ fn intercept_navigation<R: Runtime>(webview: &Webview<R>, url: &Url) -> bool {
false
}
#[tauri::command]
fn open_remote_window(app: AppHandle, payload: RemoteWindowPayload) -> Result<(), String> {
if payload.skip_tls_verify && payload.base_url.starts_with("https://") {
return Err(
"Tauri cannot bypass self-signed HTTPS certificates automatically yet. Trust the certificate in your OS first, then reconnect, or use the CodeNomad Electron app."
.to_string(),
);
}
async fn open_remote_window_impl(
app: AppHandle,
payload: RemoteWindowPayload,
tls_config: Option<ProxyTlsConfig>,
) -> Result<(), String> {
let parsed = Url::parse(&payload.base_url).map_err(|err| err.to_string())?;
let label = format!("remote-{}", payload.id);
let title = format!(
@@ -184,8 +184,41 @@ fn open_remote_window(app: AppHandle, payload: RemoteWindowPayload) -> Result<()
parsed.host_str().unwrap_or(payload.base_url.as_str())
);
let state = app.state::<AppState>();
let reuses_existing_proxy = {
let proxies = state.remote_proxies.lock().map_err(|err| err.to_string())?;
proxies
.get(&label)
.map(|existing| existing.matches(&parsed, payload.skip_tls_verify))
.unwrap_or(false)
};
let local_url = if reuses_existing_proxy {
let proxies = state.remote_proxies.lock().map_err(|err| err.to_string())?;
proxies
.get(&label)
.map(|handle| handle.entry_url().clone())
.ok_or_else(|| "Remote proxy disappeared before reuse".to_string())?
} else {
let new_proxy =
start_remote_proxy(parsed.clone(), payload.skip_tls_verify, tls_config).await?;
let local_url = new_proxy.entry_url().clone();
let mut proxies = state.remote_proxies.lock().map_err(|err| err.to_string())?;
if let Some(existing) = proxies.remove(&label) {
existing.shutdown();
}
proxies.insert(label.clone(), new_proxy);
local_url
};
app.state::<AppState>()
.remote_origins
.lock()
.map_err(|err| err.to_string())?
.insert(label.clone(), local_url.origin().ascii_serialization());
if let Some(existing) = app.get_webview_window(&label) {
let _ = existing.navigate(parsed.clone());
let _ = existing.navigate(local_url.clone());
let _ = existing.set_title(&title);
let _ = existing.show();
let _ = existing.unminimize();
@@ -193,25 +226,24 @@ fn open_remote_window(app: AppHandle, payload: RemoteWindowPayload) -> Result<()
return Ok(());
}
app.state::<AppState>()
.remote_origins
.lock()
.map_err(|err| err.to_string())?
.insert(label.clone(), parsed.origin().ascii_serialization());
let window =
WebviewWindowBuilder::new(&app, label.clone(), WebviewUrl::External(parsed.clone()))
.title(title)
.inner_size(1400.0, 900.0)
.min_inner_size(800.0, 600.0)
.build()
.map_err(|err| err.to_string())?;
let window = WebviewWindowBuilder::new(&app, label.clone(), WebviewUrl::External(local_url))
.title(title)
.inner_size(1400.0, 900.0)
.min_inner_size(800.0, 600.0)
.build()
.map_err(|err| err.to_string())?;
let app_handle = app.clone();
let label_for_cleanup = label.clone();
window.on_window_event(move |event| {
if let WindowEvent::Destroyed = event {
if let Ok(mut origins) = app_handle.state::<AppState>().remote_origins.lock() {
origins.remove(&label);
origins.remove(&label_for_cleanup);
}
if let Ok(mut proxies) = app_handle.state::<AppState>().remote_proxies.lock() {
if let Some(handle) = proxies.remove(&label_for_cleanup) {
handle.shutdown();
}
}
}
});
@@ -219,6 +251,27 @@ fn open_remote_window(app: AppHandle, payload: RemoteWindowPayload) -> Result<()
Ok(())
}
#[tauri::command]
async fn open_remote_window(app: AppHandle, payload: RemoteWindowPayload) -> Result<(), String> {
let tls_config = match cert_manager::ensure_local_cert() {
Ok(local_cert) => {
if let Err(err) = cert_manager::trust_cert_in_store(&local_cert.cert_der) {
eprintln!("[tauri] failed to trust proxy cert: {err}");
}
Some(ProxyTlsConfig {
cert_pem: local_cert.cert_pem,
key_pem: local_cert.key_pem,
})
}
Err(err) => {
eprintln!("[tauri] failed to generate proxy cert, falling back to HTTP: {err}");
None
}
};
open_remote_window_impl(app, payload, tls_config).await
}
fn collect_directory_paths(paths: &[std::path::PathBuf]) -> Vec<String> {
paths
.iter()
@@ -346,6 +399,8 @@ fn set_windows_app_user_model_id() {
fn set_windows_app_user_model_id() {}
fn main() {
let _ = rustls::crypto::ring::default_provider().install_default();
let navigation_guard: TauriPlugin<Wry, ()> = PluginBuilder::new("external-link-guard")
.on_navigation(|webview, url| intercept_navigation(webview, url))
.build();
@@ -373,6 +428,7 @@ fn main() {
wake_lock: Mutex::new(None),
zoom_level: Mutex::new(DEFAULT_ZOOM_LEVEL),
remote_origins: Mutex::new(HashMap::new()),
remote_proxies: Mutex::new(HashMap::new()),
})
.setup(|app| {
set_windows_app_user_model_id();

View File

@@ -0,0 +1,382 @@
use axum::body::Body;
use axum::extract::{Request, State};
use axum::http::{HeaderMap, HeaderName, HeaderValue, StatusCode, Uri};
use axum::response::Response;
use axum::routing::any;
use axum::Router;
use axum_server::tls_rustls::RustlsConfig;
use futures_util::TryStreamExt;
use rand::RngCore;
use reqwest::redirect::Policy;
use reqwest::Client;
use std::collections::HashSet;
use std::sync::atomic::{AtomicBool, Ordering};
use std::sync::Arc;
use url::Url;
const PROXY_TOKEN_QUERY: &str = "proxy_token";
#[derive(Clone)]
struct ProxyState {
client: Client,
target_base_url: Url,
local_base_url: Url,
session_token: String,
session_activated: Arc<AtomicBool>,
}
/// TLS configuration for the local HTTPS proxy.
pub struct ProxyTlsConfig {
pub cert_pem: String,
pub key_pem: String,
}
pub struct RemoteProxyHandle {
local_base_url: Url,
entry_url: Url,
target_base_url: Url,
skip_tls_verify: bool,
server_handle: axum_server::Handle,
}
impl RemoteProxyHandle {
pub fn local_base_url(&self) -> &Url {
&self.local_base_url
}
pub fn entry_url(&self) -> &Url {
&self.entry_url
}
pub fn matches(&self, target_base_url: &Url, skip_tls_verify: bool) -> bool {
self.target_base_url == *target_base_url && self.skip_tls_verify == skip_tls_verify
}
pub fn shutdown(&self) {
self.server_handle.shutdown();
}
}
impl Drop for RemoteProxyHandle {
fn drop(&mut self) {
self.shutdown();
}
}
pub async fn start_remote_proxy(
target_base_url: Url,
skip_tls_verify: bool,
tls_config: Option<ProxyTlsConfig>,
) -> Result<RemoteProxyHandle, String> {
let client = Client::builder()
.redirect(Policy::none())
.danger_accept_invalid_certs(skip_tls_verify)
.build()
.map_err(|err| err.to_string())?;
// Pre-bind a std TcpListener on port 0 to discover the actual port
let std_listener = std::net::TcpListener::bind("127.0.0.1:0")
.map_err(|err| err.to_string())?;
let address = std_listener.local_addr().map_err(|err| err.to_string())?;
let scheme = if tls_config.is_some() { "https" } else { "http" };
let local_base_url =
Url::parse(&format!("{scheme}://{address}")).map_err(|err| err.to_string())?;
let session_token = generate_session_token();
let mut entry_url = local_base_url.clone();
entry_url.set_path(target_base_url.path());
entry_url.set_query(Some(&format!("{PROXY_TOKEN_QUERY}={session_token}")));
let state = Arc::new(ProxyState {
client,
target_base_url: target_base_url.clone(),
local_base_url: local_base_url.clone(),
session_token,
session_activated: Arc::new(AtomicBool::new(false)),
});
let app = Router::new()
.route("/*path", any(proxy_request))
.route("/", any(proxy_request))
.with_state(state);
let server_handle = axum_server::Handle::new();
let handle_clone = server_handle.clone();
if let Some(tls) = tls_config {
let rustls_config =
RustlsConfig::from_pem(tls.cert_pem.into_bytes(), tls.key_pem.into_bytes())
.await
.map_err(|err| format!("Failed to build RustlsConfig: {err}"))?;
tauri::async_runtime::spawn(async move {
let server = axum_server::from_tcp_rustls(std_listener, rustls_config)
.handle(handle_clone)
.serve(app.into_make_service());
if let Err(err) = server.await {
eprintln!("[tauri] remote proxy (HTTPS) stopped with error: {err}");
}
});
} else {
tauri::async_runtime::spawn(async move {
let server = axum_server::from_tcp(std_listener)
.handle(handle_clone)
.serve(app.into_make_service());
if let Err(err) = server.await {
eprintln!("[tauri] remote proxy (HTTP) stopped with error: {err}");
}
});
}
Ok(RemoteProxyHandle {
local_base_url,
entry_url,
target_base_url,
skip_tls_verify,
server_handle,
})
}
async fn proxy_request(
State(state): State<Arc<ProxyState>>,
request: Request,
) -> Result<Response<Body>, StatusCode> {
if !state.session_activated.load(Ordering::SeqCst) {
if request_bootstraps_session(&request, &state.session_token) {
state.session_activated.store(true, Ordering::SeqCst);
return Ok(build_bootstrap_response(request.uri())?);
}
return Err(StatusCode::FORBIDDEN);
}
let upstream_url = build_upstream_url(&state.target_base_url, request.uri())
.map_err(|_| StatusCode::BAD_REQUEST)?;
let mut builder = state
.client
.request(request.method().clone(), upstream_url.clone());
builder = builder.headers(filter_request_headers(
request.headers(),
&state.target_base_url,
)?);
let body = axum::body::to_bytes(request.into_body(), usize::MAX)
.await
.map_err(|_| StatusCode::BAD_REQUEST)?;
if !body.is_empty() {
builder = builder.body(body);
}
let upstream = builder.send().await.map_err(map_upstream_error)?;
let status = upstream.status();
let headers = rewrite_response_headers(
upstream.headers(),
&state.target_base_url,
&state.local_base_url,
)?;
let stream = upstream
.bytes_stream()
.map_err(|err| std::io::Error::other(err.to_string()));
let mut response = Response::new(Body::from_stream(stream));
*response.status_mut() = status;
*response.headers_mut() = headers;
Ok(response)
}
fn build_upstream_url(base_url: &Url, uri: &Uri) -> Result<Url, url::ParseError> {
let mut url = base_url.clone();
url.set_path(uri.path());
url.set_query(strip_proxy_token_query(uri.query()).as_deref());
Ok(url)
}
fn generate_session_token() -> String {
let mut bytes = [0_u8; 16];
rand::thread_rng().fill_bytes(&mut bytes);
bytes.iter().map(|byte| format!("{byte:02x}")).collect()
}
fn request_bootstraps_session(request: &Request, session_token: &str) -> bool {
request.uri().query().is_some_and(|query| {
url::form_urlencoded::parse(query.as_bytes())
.any(|(name, value)| name == PROXY_TOKEN_QUERY && value == session_token)
})
}
fn build_bootstrap_response(uri: &Uri) -> Result<Response<Body>, StatusCode> {
let redirect_target = sanitized_request_target(uri);
Response::builder()
.status(StatusCode::FOUND)
.header(axum::http::header::LOCATION, redirect_target)
.body(Body::empty())
.map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)
}
fn sanitized_request_target(uri: &Uri) -> String {
let path = if uri.path().is_empty() { "/" } else { uri.path() };
match strip_proxy_token_query(uri.query()) {
Some(query) if !query.is_empty() => format!("{path}?{query}"),
_ => path.to_string(),
}
}
fn strip_proxy_token_query(query: Option<&str>) -> Option<String> {
let query = query?;
let filtered: Vec<(std::borrow::Cow<'_, str>, std::borrow::Cow<'_, str>)> =
url::form_urlencoded::parse(query.as_bytes())
.filter(|(name, _)| name != PROXY_TOKEN_QUERY)
.collect();
if filtered.is_empty() {
return None;
}
Some(
url::form_urlencoded::Serializer::new(String::new())
.extend_pairs(filtered)
.finish(),
)
}
fn filter_request_headers(
headers: &HeaderMap,
target_base_url: &Url,
) -> Result<HeaderMap, StatusCode> {
let mut forwarded = HeaderMap::new();
for (name, value) in headers {
if is_hop_by_hop_header(name) || *name == axum::http::header::HOST {
continue;
}
forwarded.append(name.clone(), value.clone());
}
let host = target_base_url.host_str().ok_or(StatusCode::BAD_REQUEST)?;
let host_value = match target_base_url.port() {
Some(port) => format!("{host}:{port}"),
None => host.to_string(),
};
forwarded.insert(
axum::http::header::HOST,
HeaderValue::from_str(&host_value).map_err(|_| StatusCode::BAD_REQUEST)?,
);
let target_origin = target_base_url.origin().ascii_serialization();
if let Ok(origin) = HeaderValue::from_str(&target_origin) {
forwarded.insert(axum::http::header::ORIGIN, origin);
}
if let Some(referer) = rewrite_referer_header(headers, target_base_url) {
forwarded.insert(
axum::http::header::REFERER,
HeaderValue::from_str(&referer).map_err(|_| StatusCode::BAD_REQUEST)?,
);
}
Ok(forwarded)
}
fn rewrite_referer_header(headers: &HeaderMap, target_base_url: &Url) -> Option<String> {
let referer = headers.get(axum::http::header::REFERER)?.to_str().ok()?;
let parsed = Url::parse(referer).ok()?;
let mut rewritten = target_base_url.clone();
rewritten.set_path(parsed.path());
rewritten.set_query(parsed.query());
rewritten.set_fragment(parsed.fragment());
Some(rewritten.to_string())
}
fn rewrite_response_headers(
headers: &HeaderMap,
target_base_url: &Url,
local_base_url: &Url,
) -> Result<HeaderMap, StatusCode> {
let mut rewritten = HeaderMap::new();
for (name, value) in headers {
if is_hop_by_hop_header(name) {
continue;
}
if *name == axum::http::header::LOCATION {
if let Ok(location) = value.to_str() {
let next = rewrite_location(location, target_base_url, local_base_url);
rewritten.append(
name.clone(),
HeaderValue::from_str(&next).map_err(|_| StatusCode::BAD_GATEWAY)?,
);
continue;
}
}
if *name == axum::http::header::SET_COOKIE {
if let Ok(cookie) = value.to_str() {
let next = rewrite_set_cookie(cookie);
rewritten.append(
name.clone(),
HeaderValue::from_str(&next).map_err(|_| StatusCode::BAD_GATEWAY)?,
);
continue;
}
}
rewritten.append(name.clone(), value.clone());
}
Ok(rewritten)
}
fn rewrite_set_cookie(cookie: &str) -> String {
cookie
.split(';')
.map(str::trim)
.filter(|part| !part.get(..7).is_some_and(|prefix| prefix.eq_ignore_ascii_case("Domain=")))
.collect::<Vec<_>>()
.join("; ")
}
fn rewrite_location(location: &str, target_base_url: &Url, local_base_url: &Url) -> String {
let Ok(parsed) = target_base_url.join(location) else {
return location.to_string();
};
if parsed.origin() != target_base_url.origin() {
return location.to_string();
}
let mut rewritten = local_base_url.clone();
rewritten.set_path(parsed.path());
rewritten.set_query(parsed.query());
rewritten.set_fragment(parsed.fragment());
rewritten.to_string()
}
fn map_upstream_error(error: reqwest::Error) -> StatusCode {
if error.is_timeout() {
StatusCode::GATEWAY_TIMEOUT
} else if error.is_connect() {
StatusCode::BAD_GATEWAY
} else {
StatusCode::INTERNAL_SERVER_ERROR
}
}
fn is_hop_by_hop_header(name: &HeaderName) -> bool {
static HOP_BY_HOP: std::sync::OnceLock<HashSet<&'static str>> = std::sync::OnceLock::new();
HOP_BY_HOP
.get_or_init(|| {
HashSet::from([
"connection",
"keep-alive",
"proxy-authenticate",
"proxy-authorization",
"te",
"trailer",
"transfer-encoding",
"upgrade",
])
})
.contains(name.as_str())
}