377 lines
13 KiB
Rust
377 lines
13 KiB
Rust
//! Navigator backend for web
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use js_sys::{Array, ArrayBuffer, Uint8Array};
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use ruffle_core::backend::navigator::{
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async_return, create_fetch_error, create_specific_fetch_error, ErrorResponse, NavigationMethod,
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NavigatorBackend, OpenURLMode, OwnedFuture, Request, SuccessResponse,
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};
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use ruffle_core::config::NetworkingAccessMode;
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use ruffle_core::indexmap::IndexMap;
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use ruffle_core::loader::Error;
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use ruffle_core::socket::{ConnectionState, SocketAction, SocketHandle};
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use std::sync::mpsc::{Receiver, Sender};
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use std::sync::Arc;
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use std::time::Duration;
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use tracing_subscriber::layer::Layered;
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use tracing_subscriber::Registry;
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use tracing_wasm::WASMLayer;
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use url::{ParseError, Url};
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use wasm_bindgen::JsCast;
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use wasm_bindgen_futures::{spawn_local, JsFuture};
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use web_sys::{
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window, Blob, BlobPropertyBag, HtmlFormElement, HtmlInputElement, Request as WebRequest,
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RequestInit, Response as WebResponse,
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};
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pub struct WebNavigatorBackend {
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log_subscriber: Arc<Layered<WASMLayer, Registry>>,
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allow_script_access: bool,
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allow_networking: NetworkingAccessMode,
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upgrade_to_https: bool,
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base_url: Option<Url>,
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open_url_mode: OpenURLMode,
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}
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impl WebNavigatorBackend {
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pub fn new(
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allow_script_access: bool,
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allow_networking: NetworkingAccessMode,
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upgrade_to_https: bool,
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base_url: Option<String>,
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log_subscriber: Arc<Layered<WASMLayer, Registry>>,
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open_url_mode: OpenURLMode,
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) -> Self {
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let window = web_sys::window().expect("window()");
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// Upgrade to HTTPS takes effect if the current page is hosted on HTTPS.
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let upgrade_to_https =
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upgrade_to_https && window.location().protocol().expect("protocol()") == "https:";
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// Retrieve and parse `document.baseURI`.
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let document_base_uri = || {
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let document = window.document().expect("document()");
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if let Ok(Some(base_uri)) = document.base_uri() {
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return Url::parse(&base_uri).ok();
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}
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None
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};
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let base_url = if let Some(mut base_url) = base_url {
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// Adding trailing slash so `Url::parse` will not drop the last part.
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if !base_url.ends_with('/') {
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base_url.push('/');
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}
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Url::parse(&base_url)
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.ok()
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.or_else(|| document_base_uri().and_then(|base_uri| base_uri.join(&base_url).ok()))
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} else {
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document_base_uri()
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};
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if base_url.is_none() {
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tracing::error!("Could not get base URL for base directory inference.");
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}
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Self {
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allow_script_access,
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allow_networking,
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upgrade_to_https,
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base_url,
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log_subscriber,
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open_url_mode,
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}
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}
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}
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impl NavigatorBackend for WebNavigatorBackend {
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fn navigate_to_url(
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&self,
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url: &str,
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target: &str,
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vars_method: Option<(NavigationMethod, IndexMap<String, String>)>,
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) {
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// If the URL is empty, ignore the request.
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if url.is_empty() {
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return;
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}
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let url = match self.resolve_url(url) {
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Ok(url) => {
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if url.scheme() == "file" {
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tracing::error!(
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"Can't open the local URL {} on WASM target",
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url.to_string()
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);
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return;
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} else {
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url
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}
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}
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Err(e) => {
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tracing::error!(
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"Could not parse URL because of {}, the corrupt URL was: {}",
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e,
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url
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);
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return;
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}
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};
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// If `allowNetworking` is set to `internal` or `none`, block all `navigate_to_url` calls.
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if self.allow_networking != NetworkingAccessMode::All {
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tracing::warn!("SWF tried to open a URL, but opening URLs is not allowed");
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return;
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}
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// If `allowScriptAccess` is disabled, reject the `javascript:` scheme.
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// Also reject any attempt to open a URL when `target` is a keyword that affects the current tab.
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if !self.allow_script_access {
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if url.scheme() == "javascript" {
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tracing::warn!("SWF tried to run a script, but script access is not allowed");
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return;
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} else {
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match target.to_lowercase().as_str() {
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"_parent" | "_self" | "_top" | "" => {
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tracing::warn!("SWF tried to open a URL, but opening URLs in the current tab is prevented by script access");
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return;
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}
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_ => (),
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}
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}
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}
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let window = window().expect("window()");
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if url.scheme() != "javascript" {
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if self.open_url_mode == OpenURLMode::Confirm {
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let message = format!("The SWF file wants to open the website {}", &url);
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// TODO: Add a checkbox with a GUI toolkit
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let confirm = window
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.confirm_with_message(&message)
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.expect("confirm_with_message()");
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if !confirm {
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tracing::info!(
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"SWF tried to open a website, but the user declined the request"
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);
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return;
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}
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} else if self.open_url_mode == OpenURLMode::Deny {
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tracing::warn!("SWF tried to open a website, but opening a website is not allowed");
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return;
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}
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// If the user confirmed or if in `Allow` mode, open the website.
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}
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// TODO: Should we return a result for failed opens? Does Flash care?
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match vars_method {
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Some((navmethod, formvars)) => {
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let document = window.document().expect("document()");
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let body = match document.body() {
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Some(body) => body,
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None => return,
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};
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let form: HtmlFormElement = document
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.create_element("form")
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.expect("create_element() must succeed")
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.dyn_into()
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.expect("create_element(\"form\") didn't give us a form");
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form.set_method(&navmethod.to_string());
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form.set_action(url.as_str());
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if !target.is_empty() {
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form.set_target(target);
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}
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for (key, value) in formvars {
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let hidden: HtmlInputElement = document
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.create_element("input")
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.expect("create_element() must succeed")
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.dyn_into()
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.expect("create_element(\"input\") didn't give us an input");
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hidden.set_type("hidden");
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hidden.set_name(&key);
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hidden.set_value(&value);
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let _ = form.append_child(&hidden);
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}
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let _ = body.append_child(&form);
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let _ = form.submit();
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}
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None => {
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if target.is_empty() {
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let _ = window.location().assign(url.as_str());
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} else {
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let _ = window.open_with_url_and_target(url.as_str(), target);
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}
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}
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};
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}
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fn fetch(&self, request: Request) -> OwnedFuture<SuccessResponse, ErrorResponse> {
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let url = match self.resolve_url(request.url()) {
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Ok(url) => {
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if url.scheme() == "file" {
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return async_return(create_specific_fetch_error(
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"WASM target can't fetch local URL",
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url.as_str(),
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"",
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));
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} else {
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url
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}
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}
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Err(e) => {
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return async_return(create_fetch_error(request.url(), e));
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}
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};
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Box::pin(async move {
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let mut init = RequestInit::new();
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init.method(&request.method().to_string());
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if let Some((data, mime)) = request.body() {
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let blob = Blob::new_with_buffer_source_sequence_and_options(
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&Array::from_iter([Uint8Array::from(data.as_slice()).buffer()]),
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BlobPropertyBag::new().type_(mime),
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)
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.map_err(|_| ErrorResponse {
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url: url.to_string(),
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error: Error::FetchError("Got JS error".to_string()),
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})?
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.dyn_into()
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.map_err(|_| ErrorResponse {
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url: url.to_string(),
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error: Error::FetchError("Got JS error".to_string()),
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})?;
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init.body(Some(&blob));
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}
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let web_request = match WebRequest::new_with_str_and_init(url.as_str(), &init) {
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Ok(web_request) => web_request,
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Err(_) => {
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return create_specific_fetch_error(
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"Unable to create request for",
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url.as_str(),
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"",
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)
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}
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};
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let headers = web_request.headers();
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for (header_name, header_val) in request.headers() {
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headers
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.set(header_name, header_val)
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.map_err(|_| ErrorResponse {
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url: url.to_string(),
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error: Error::FetchError("Got JS error".to_string()),
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})?;
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}
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let window = web_sys::window().expect("window()");
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let fetchval = JsFuture::from(window.fetch_with_request(&web_request))
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.await
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.map_err(|_| ErrorResponse {
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url: url.to_string(),
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error: Error::FetchError("Got JS error".to_string()),
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})?;
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let response: WebResponse = fetchval.dyn_into().map_err(|_| ErrorResponse {
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url: url.to_string(),
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error: Error::FetchError("Fetch result wasn't a WebResponse".to_string()),
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})?;
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let url = response.url();
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let status = response.status();
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let redirected = response.redirected();
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if !response.ok() {
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let error = Error::HttpNotOk(
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format!("HTTP status is not ok, got {}", response.status_text()),
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status,
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redirected,
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);
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return Err(ErrorResponse { url, error });
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}
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let body: ArrayBuffer = JsFuture::from(response.array_buffer().map_err(|_| {
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ErrorResponse {
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url: url.clone(),
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error: Error::FetchError("Got JS error".to_string()),
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}
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})?)
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.await
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.map_err(|_| ErrorResponse {
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url: url.clone(),
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error: Error::FetchError(
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"Could not allocate array buffer for response".to_string(),
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),
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})?
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.dyn_into()
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.map_err(|_| ErrorResponse {
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url: url.clone(),
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error: Error::FetchError("array_buffer result wasn't an ArrayBuffer".to_string()),
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})?;
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let body = Uint8Array::new(&body).to_vec();
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Ok(SuccessResponse {
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url,
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body,
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status,
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redirected,
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})
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})
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}
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fn resolve_url(&self, url: &str) -> Result<Url, ParseError> {
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if let Some(base_url) = &self.base_url {
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match base_url.join(url) {
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Ok(full_url) => Ok(self.pre_process_url(full_url)),
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Err(error) => Err(error),
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}
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} else {
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match Url::parse(url) {
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Ok(parsed_url) => Ok(self.pre_process_url(parsed_url)),
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Err(error) => Err(error),
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}
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}
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}
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fn spawn_future(&mut self, future: OwnedFuture<(), Error>) {
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let subscriber = self.log_subscriber.clone();
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spawn_local(async move {
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let _subscriber = tracing::subscriber::set_default(subscriber);
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if let Err(e) = future.await {
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tracing::error!("Asynchronous error occurred: {}", e);
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}
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})
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}
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fn pre_process_url(&self, mut url: Url) -> Url {
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if self.upgrade_to_https && url.scheme() == "http" && url.set_scheme("https").is_err() {
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tracing::error!("Url::set_scheme failed on: {}", url);
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}
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url
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}
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fn connect_socket(
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&mut self,
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_host: String,
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_port: u16,
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_timeout: Duration,
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handle: SocketHandle,
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_receiver: Receiver<Vec<u8>>,
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sender: Sender<SocketAction>,
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) {
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// FIXME: Add way to call out to JS code.
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sender
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.send(SocketAction::Connect(handle, ConnectionState::Failed))
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.expect("working channel send");
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}
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}
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