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navigator.rs
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navigator.rs
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mod fetch;
use crate::backends::executor::{spawn_tokio, FutureSpawner};
use crate::backends::navigator::fetch::{Response, ResponseBody};
use crate::content::PlayingContent;
use async_channel::{Receiver, Sender, TryRecvError};
use async_io::Timer;
use futures_lite::FutureExt;
use reqwest::{cookie, header, Proxy};
use ruffle_core::backend::navigator::{
async_return, create_fetch_error, get_encoding, ErrorResponse, NavigationMethod,
NavigatorBackend, OpenURLMode, OwnedFuture, Request, SocketMode, SuccessResponse,
};
use ruffle_core::indexmap::IndexMap;
use ruffle_core::loader::Error;
use ruffle_core::socket::{ConnectionState, SocketAction, SocketHandle};
use std::collections::HashSet;
use std::fs::File;
use std::io;
use std::io::ErrorKind;
use std::path::Path;
use std::rc::Rc;
use std::sync::{Arc, Mutex};
use std::time::Duration;
use tokio::io::{AsyncReadExt, AsyncWriteExt};
use tokio::net::TcpStream;
use tracing::warn;
use url::{ParseError, Url};
pub trait NavigatorInterface: Clone + Send + 'static {
fn navigate_to_website(&self, url: Url, ask: bool);
fn open_file(&self, path: &Path) -> impl std::future::Future<Output = io::Result<File>> + Send;
fn confirm_socket(
&self,
host: &str,
port: u16,
) -> impl std::future::Future<Output = bool> + Send;
}
/// Implementation of `NavigatorBackend` for non-web environments that can call
/// out to a web browser.
pub struct ExternalNavigatorBackend<F: FutureSpawner, I: NavigatorInterface> {
/// Sink for tasks sent to us through `spawn_future`.
future_spawner: F,
/// The url to use for all relative fetches.
base_url: Url,
// Client to use for network requests
client: Option<Rc<reqwest::Client>>,
socket_allowed: HashSet<String>,
socket_mode: SocketMode,
upgrade_to_https: bool,
open_url_mode: OpenURLMode,
content: Rc<PlayingContent>,
interface: I,
}
impl<F: FutureSpawner, I: NavigatorInterface> ExternalNavigatorBackend<F, I> {
/// Construct a navigator backend with fetch and async capability.
#[allow(clippy::too_many_arguments)]
pub fn new(
mut base_url: Url,
referer: Option<Url>,
cookie: Option<String>,
future_spawner: F,
proxy: Option<Url>,
upgrade_to_https: bool,
open_url_mode: OpenURLMode,
socket_allowed: HashSet<String>,
socket_mode: SocketMode,
content: Rc<PlayingContent>,
interface: I,
) -> Self {
let mut builder = reqwest::ClientBuilder::new()
.cookie_store(true)
.user_agent(concat!(
"Ruffle/",
env!("CARGO_PKG_VERSION"),
" (https://ruffle.rs)"
));
if let Some(referer) = referer {
let mut headers = header::HeaderMap::new();
headers.insert(header::REFERER, referer.to_string().parse().unwrap());
builder = builder.default_headers(headers);
}
if let Some(cookie) = cookie {
let cookie_jar = cookie::Jar::default();
cookie_jar.add_cookie_str(&cookie, &base_url);
let cookie_store = std::sync::Arc::new(cookie_jar);
builder = builder.cookie_provider(cookie_store)
}
if let Some(proxy) = proxy {
match Proxy::all(proxy.clone()) {
Ok(proxy) => {
builder = builder.proxy(proxy);
}
Err(e) => {
tracing::error!("Couldn't configure proxy {proxy}: {e}")
}
}
}
let client = builder.build().ok().map(Rc::new);
// Force replace the last segment with empty. //
if let Ok(mut base_url) = base_url.path_segments_mut() {
base_url.pop().pop_if_empty().push("");
}
Self {
future_spawner,
client,
base_url,
upgrade_to_https,
open_url_mode,
socket_allowed,
socket_mode,
content,
interface,
}
}
}
impl<F: FutureSpawner + 'static, I: NavigatorInterface> NavigatorBackend
for ExternalNavigatorBackend<F, I>
{
fn navigate_to_url(
&self,
url: &str,
_target: &str,
vars_method: Option<(NavigationMethod, IndexMap<String, String>)>,
) {
//TODO: Should we return a result for failed opens? Does Flash care?
//NOTE: Flash desktop players / projectors ignore the window parameter,
// unless it's a `_layer`, and we shouldn't handle that anyway.
let mut parsed_url = match self.resolve_url(url) {
Ok(parsed_url) => parsed_url,
Err(e) => {
tracing::error!(
"Could not parse URL because of {}, the corrupt URL was: {}",
e,
url
);
return;
}
};
let modified_url = match vars_method {
Some((_, query_pairs)) if !query_pairs.is_empty() => {
{
//lifetime limiter because we don't have NLL yet
let mut modifier = parsed_url.query_pairs_mut();
for (k, v) in query_pairs.iter() {
modifier.append_pair(k, v);
}
}
parsed_url
}
_ => parsed_url,
};
if modified_url.scheme() == "javascript" {
tracing::warn!(
"SWF tried to run a script on desktop, but javascript calls are not allowed"
);
return;
}
if self.open_url_mode == OpenURLMode::Deny {
tracing::warn!("SWF tried to open a website, but opening a website is not allowed");
return;
}
let ask = self.open_url_mode == OpenURLMode::Confirm;
self.interface.navigate_to_website(modified_url, ask);
}
fn fetch(&self, request: Request) -> OwnedFuture<Box<dyn SuccessResponse>, ErrorResponse> {
// TODO: honor sandbox type (local-with-filesystem, local-with-network, remote, ...)
let mut processed_url = match self.resolve_url(request.url()) {
Ok(url) => url,
Err(e) => {
return async_return(create_fetch_error(request.url(), e));
}
};
let client = self.client.clone();
match processed_url.scheme() {
"file" => {
let content = self.content.clone();
let interface = self.interface.clone();
Box::pin(async move {
// We send the original url (including query parameters)
// back to ruffle_core in the `Response`
let response_url = processed_url.clone();
// Flash supports query parameters with local urls.
// SwfMovie takes care of exposing those to ActionScript -
// when we actually load a filesystem url, strip them out.
processed_url.set_query(None);
let contents = content.get_local_file(&processed_url, interface).await;
let response: Box<dyn SuccessResponse> = Box::new(Response {
url: response_url.to_string(),
response_body: ResponseBody::File(contents),
text_encoding: None,
status: 0,
redirected: false,
});
Ok(response)
})
}
_ => Box::pin(async move {
let client = client.ok_or_else(|| ErrorResponse {
url: processed_url.to_string(),
error: Error::FetchError("Network unavailable".to_string()),
})?;
let mut request_builder = match request.method() {
NavigationMethod::Get => client.get(processed_url.clone()),
NavigationMethod::Post => client.post(processed_url.clone()),
};
let (body_data, mime) = request.body().clone().unwrap_or_default();
for (name, val) in request.headers().iter() {
request_builder = request_builder.header(name, val);
}
request_builder = request_builder.header("Content-Type", &mime);
request_builder = request_builder.body(body_data);
let response = spawn_tokio(request_builder.send()).await.map_err(|e| {
let inner = if e.is_connect() {
Error::InvalidDomain(processed_url.to_string())
} else {
Error::FetchError(e.to_string())
};
ErrorResponse {
url: processed_url.to_string(),
error: inner,
}
})?;
let url = response.url().to_string();
let text_encoding = response
.headers()
.get("Content-Type")
.and_then(|content_type| content_type.to_str().ok())
.and_then(get_encoding);
let status = response.status().as_u16();
let redirected = *response.url() != processed_url;
if !response.status().is_success() {
let error = Error::HttpNotOk(
format!("HTTP status is not ok, got {}", response.status()),
status,
redirected,
response.content_length().unwrap_or_default(),
);
return Err(ErrorResponse { url, error });
}
let response: Box<dyn SuccessResponse> = Box::new(Response {
url,
response_body: ResponseBody::Network(Arc::new(Mutex::new(Some(response)))),
text_encoding,
status,
redirected,
});
Ok(response)
}),
}
}
fn resolve_url(&self, url: &str) -> Result<Url, ParseError> {
match self.base_url.join(url) {
Ok(url) => Ok(self.pre_process_url(url)),
Err(error) => Err(error),
}
}
fn spawn_future(&mut self, future: OwnedFuture<(), Error>) {
self.future_spawner.spawn(future);
}
fn pre_process_url(&self, mut url: Url) -> Url {
if self.upgrade_to_https && url.scheme() == "http" && url.set_scheme("https").is_err() {
tracing::error!("Url::set_scheme failed on: {}", url);
}
url
}
fn connect_socket(
&mut self,
host: String,
port: u16,
timeout: Duration,
handle: SocketHandle,
receiver: Receiver<Vec<u8>>,
sender: Sender<SocketAction>,
) {
let addr = format!("{}:{}", host, port);
let is_allowed = self.socket_allowed.contains(&addr);
let socket_mode = self.socket_mode;
let interface = self.interface.clone();
let future = Box::pin(async move {
match (is_allowed, socket_mode) {
(false, SocketMode::Allow) | (true, _) => {} // the process is allowed to continue. just dont do anything.
(false, SocketMode::Deny) => {
// Just fail the connection.
sender
.try_send(SocketAction::Connect(handle, ConnectionState::Failed))
.expect("working channel send");
tracing::warn!(
"SWF tried to open a socket, but opening a socket is not allowed"
);
return;
}
(false, SocketMode::Ask) => {
let attempt_sandbox_connect = interface.confirm_socket(&host, port).await;
if !attempt_sandbox_connect {
// fail the connection.
sender
.try_send(SocketAction::Connect(handle, ConnectionState::Failed))
.expect("working channel send");
return;
}
}
}
let host2 = host.clone();
let timeout = async {
Timer::after(timeout).await;
Result::<TcpStream, io::Error>::Err(io::Error::new(ErrorKind::TimedOut, ""))
};
let mut stream = match TcpStream::connect((host, port)).or(timeout).await {
Err(e) if e.kind() == ErrorKind::TimedOut => {
warn!("Connection to {}:{} timed out", host2, port);
sender
.try_send(SocketAction::Connect(handle, ConnectionState::TimedOut))
.expect("working channel send");
return;
}
Ok(stream) => {
sender
.try_send(SocketAction::Connect(handle, ConnectionState::Connected))
.expect("working channel send");
stream
}
Err(err) => {
warn!("Failed to connect to {}:{}, error: {}", host2, port, err);
sender
.try_send(SocketAction::Connect(handle, ConnectionState::Failed))
.expect("working channel send");
return;
}
};
let sender = sender;
//NOTE: We clone the sender here as we cant share it between async tasks.
let sender2 = sender.clone();
let (mut read, mut write) = stream.split();
let read = async move {
loop {
let mut buffer = [0; 4096];
match read.read(&mut buffer).await {
Err(e) if e.kind() == ErrorKind::TimedOut => {} // try again later.
Err(_) | Ok(0) => {
sender
.try_send(SocketAction::Close(handle))
.expect("working channel send");
break;
}
Ok(read) => {
let buffer = buffer.into_iter().take(read).collect::<Vec<_>>();
sender
.try_send(SocketAction::Data(handle, buffer))
.expect("working channel send");
}
};
}
};
let write = async move {
let mut pending_write = vec![];
loop {
let close_connection = loop {
match receiver.try_recv() {
Ok(val) => {
pending_write.extend(val);
}
Err(TryRecvError::Empty) => break false,
Err(TryRecvError::Closed) => {
//NOTE: Channel sender has been dropped.
// This means we have to close the connection,
// but not here, as we might have a pending write.
break true;
}
}
};
if !pending_write.is_empty() {
match write.write(&pending_write).await {
Err(e) if e.kind() == ErrorKind::TimedOut => {} // try again later.
Err(_) => {
sender2
.try_send(SocketAction::Close(handle))
.expect("working channel send");
return;
}
Ok(written) => {
let _ = pending_write.drain(..written);
}
}
} else if close_connection {
return;
} else {
// Receiver is empty and there's no pending data,
// we may block here and wait for new data.
match receiver.recv().await {
Ok(val) => {
pending_write.extend(val);
}
Err(_) => {
// Ignore the error here, it will be
// reported again in try_recv.
}
}
}
}
};
//NOTE: If one future exits, this will take the other one down too.
tokio::select! {
_ = read => {},
_ = write => {},
};
if let Err(e) = stream.shutdown().await {
tracing::warn!("Failed to shutdown write half of TcpStream: {e}");
}
});
tokio::spawn(future);
}
}
#[cfg(test)]
#[allow(clippy::unwrap_used)]
mod tests {
use ruffle_core::socket::SocketAction::{Close, Connect, Data};
use std::net::SocketAddr;
use std::str::FromStr;
use tokio::net::TcpListener;
use tokio::task;
use super::*;
impl NavigatorInterface for () {
fn navigate_to_website(&self, _url: Url, _ask: bool) {}
async fn open_file(&self, path: &Path) -> io::Result<File> {
File::open(path)
}
async fn confirm_socket(&self, _host: &str, _port: u16) -> bool {
true
}
}
const TIMEOUT_ZERO: Duration = Duration::ZERO;
// The timeout has to be large enough to allow "instantaneous" actions
// and local IO to execute, but small enough to fail tests quickly.
const TIMEOUT: Duration = Duration::from_secs(1);
struct TestFutureSpawner;
impl FutureSpawner for TestFutureSpawner {
fn spawn(&self, future: OwnedFuture<(), Error>) {
task::spawn_local(future);
}
}
macro_rules! async_timeout {
() => {
async {
Timer::after(TIMEOUT).await;
panic!("An action which should complete timed out")
}
};
}
macro_rules! async_test {
(
async fn $test_name:ident() $content:block
) => {
#[tokio::test(flavor = "current_thread")]
async fn $test_name() {
task::LocalSet::new().run_until(async move $content).await;
}
}
}
macro_rules! dummy_handle {
() => {
SocketHandle::default()
};
}
macro_rules! assert_next_socket_actions {
($receiver:expr;) => {
// no more actions
};
($receiver:expr; $action:expr, $($more:expr,)*) => {
assert_eq!($receiver.recv().or(async_timeout!()).await.expect("receive action"), $action);
assert_next_socket_actions!($receiver; $($more,)*);
};
}
fn new_test_backend(socket_allow: bool) -> ExternalNavigatorBackend<TestFutureSpawner, ()> {
let url = Url::parse("https://example.com/path/").unwrap();
ExternalNavigatorBackend::new(
url.clone(),
None,
None,
TestFutureSpawner,
None,
false,
OpenURLMode::Allow,
Default::default(),
if socket_allow {
SocketMode::Allow
} else {
SocketMode::Deny
},
Rc::new(PlayingContent::DirectFile(url)),
(),
)
}
async fn start_test_server() -> (task::JoinHandle<TcpStream>, SocketAddr) {
let listener = TcpListener::bind("127.0.0.1:0").await.unwrap();
let addr = listener.local_addr().unwrap();
let accept_task = task::spawn_local(async move {
let (socket, _) = listener.accept().or(async_timeout!()).await.unwrap();
socket
});
(accept_task, addr)
}
fn connect_test_socket(
addr: SocketAddr,
timeout: Duration,
socket_allow: bool,
) -> (Sender<Vec<u8>>, Receiver<SocketAction>) {
let mut backend = new_test_backend(socket_allow);
let (write, receiver) = async_channel::unbounded();
let (sender, read) = async_channel::unbounded();
backend.connect_socket(
addr.ip().to_string(),
addr.port(),
timeout,
dummy_handle!(),
receiver,
sender,
);
(write, read)
}
async fn write_server(server_socket: &mut TcpStream, data: &str) {
server_socket
.write(data.as_bytes())
.or(async_timeout!())
.await
.expect("server write");
}
async fn read_server(server_socket: &mut TcpStream) -> String {
let mut buffer = [0; 4096];
let read = match server_socket.read(&mut buffer).await {
Err(e) => {
panic!("server read error: {}", e);
}
Ok(read) => read,
};
let buffer = buffer.into_iter().take(read).collect::<Vec<_>>();
String::from_utf8(buffer).unwrap()
}
async fn write_client(client_write: &Sender<Vec<u8>>, data: &str) {
client_write
.send(data.as_bytes().to_vec())
.or(async_timeout!())
.await
.expect("client write");
}
#[macro_rules_attribute::apply(async_test)]
async fn test_socket_timeout() {
let (_accept_task, addr) = start_test_server().await;
let (_client_write, client_read) = connect_test_socket(addr, TIMEOUT_ZERO, true);
assert_next_socket_actions!(
client_read;
Connect(dummy_handle!(), ConnectionState::TimedOut),
);
}
#[macro_rules_attribute::apply(async_test)]
async fn test_socket_connect() {
let (accept_task, addr) = start_test_server().await;
let (_client_write, client_read) = connect_test_socket(addr, TIMEOUT, true);
let _server_socket = accept_task.await.unwrap();
assert_next_socket_actions!(
client_read;
Connect(dummy_handle!(), ConnectionState::Connected),
);
}
#[macro_rules_attribute::apply(async_test)]
async fn test_socket_deny() {
let (_accept_task, addr) = start_test_server().await;
let (_client_write, client_read) = connect_test_socket(addr, TIMEOUT, false);
assert_next_socket_actions!(
client_read;
Connect(dummy_handle!(), ConnectionState::Failed),
);
}
#[macro_rules_attribute::apply(async_test)]
async fn test_socket_fail() {
// We want to use here an address that will cause the connection to fail instantly.
// On Windows and macOS we use an IPv6 black hole address,
// as connections to 127.0.0.42:226 do not fail instantly.
// On Linux we try to use a loopback address with an unused port,
// because some hosts try connecting to the black hole address.
let addr = if cfg!(target_os = "linux") {
SocketAddr::from_str("127.0.0.42:226")
} else {
SocketAddr::from_str("[100::]:42")
}
.expect("test address");
let (_client_write, client_read) = connect_test_socket(addr, TIMEOUT, true);
assert_next_socket_actions!(
client_read;
Connect(dummy_handle!(), ConnectionState::Failed),
);
}
#[macro_rules_attribute::apply(async_test)]
async fn test_socket_server_close() {
let (accept_task, addr) = start_test_server().await;
let (_client_write, client_read) = connect_test_socket(addr, TIMEOUT, true);
let server_socket = accept_task.await.unwrap();
assert_next_socket_actions!(
client_read;
Connect(dummy_handle!(), ConnectionState::Connected),
);
drop(server_socket);
assert_next_socket_actions!(
client_read;
Close(dummy_handle!()),
);
}
#[macro_rules_attribute::apply(async_test)]
async fn test_socket_client_close() {
let (accept_task, addr) = start_test_server().await;
let (client_write, client_read) = connect_test_socket(addr, TIMEOUT, true);
let mut server_socket = accept_task.await.unwrap();
assert_next_socket_actions!(
client_read;
Connect(dummy_handle!(), ConnectionState::Connected),
);
drop(client_write);
assert_eq!(read_server(&mut server_socket).await, "");
}
#[macro_rules_attribute::apply(async_test)]
async fn test_socket_basic_communication() {
let (accept_task, addr) = start_test_server().await;
let (client_write, client_read) = connect_test_socket(addr, TIMEOUT, true);
let mut server_socket = accept_task.await.unwrap();
assert_next_socket_actions!(
client_read;
Connect(dummy_handle!(), ConnectionState::Connected),
);
write_server(&mut server_socket, "Hello World!").await;
assert_next_socket_actions!(
client_read;
Data(dummy_handle!(), "Hello World!".as_bytes().to_vec()),
);
write_client(&client_write, "Hello from client").await;
assert_eq!(read_server(&mut server_socket).await, "Hello from client");
write_server(&mut server_socket, "from server 2").await;
write_client(&client_write, "from client 2").await;
assert_next_socket_actions!(
client_read;
Data(dummy_handle!(), "from server 2".as_bytes().to_vec()),
);
assert_eq!(read_server(&mut server_socket).await, "from client 2");
}
#[macro_rules_attribute::apply(async_test)]
async fn test_socket_flush_before_close() {
let (accept_task, addr) = start_test_server().await;
let (client_write, client_read) = connect_test_socket(addr, TIMEOUT, true);
let mut server_socket = accept_task.await.unwrap();
assert_next_socket_actions!(
client_read;
Connect(dummy_handle!(), ConnectionState::Connected),
);
write_client(&client_write, "Sending some data").await;
client_write.close();
assert_eq!(read_server(&mut server_socket).await, "Sending some data");
}
}