258 lines
8.8 KiB
Rust
258 lines
8.8 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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url_from_relative_url, NavigationMethod, NavigatorBackend, OwnedFuture, RequestOptions,
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};
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use ruffle_core::indexmap::IndexMap;
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use ruffle_core::loader::Error;
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use std::borrow::Cow;
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use url::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::{window, Blob, BlobPropertyBag, Document, Request, RequestInit, Response};
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pub struct WebNavigatorBackend {
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allow_script_access: bool,
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upgrade_to_https: bool,
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base_url: Option<String>,
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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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upgrade_to_https: bool,
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mut base_url: Option<String>,
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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().unwrap_or_default() == "https:";
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if let Some(base) = &mut base_url {
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// Adding trailing slash so url::parse will not drop last part
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if !base.ends_with('/') {
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base.push('/');
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}
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if Url::parse(base).is_err() {
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let document = window.document().expect("Could not get document");
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if let Ok(Some(doc_base_uri)) = document.base_uri() {
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let doc_url =
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Url::parse(&doc_base_uri).expect("Could not parse document base uri");
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if let Ok(joined_url) = doc_url.join(base) {
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base_url = Some(joined_url.into());
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} else {
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log::error!("Bad base directory {}", base);
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base_url = None;
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}
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} else {
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log::error!("Could not get document base_uri for base directory inference");
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base_url = None;
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}
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}
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}
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Self {
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allow_script_access,
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upgrade_to_https,
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base_url,
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}
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}
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fn base_uri(&self, document: &Document) -> Option<String> {
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if let Some(base_url) = self.base_url.clone() {
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Some(base_url)
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} else if let Ok(Some(base_uri)) = document.base_uri() {
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Some(base_uri)
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} else {
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None
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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: String,
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window_spec: Option<String>,
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vars_method: Option<(NavigationMethod, IndexMap<String, String>)>,
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) {
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// If the URL is empty, we ignore the request
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if url.is_empty() {
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return;
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}
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if let Some(window) = window() {
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let document = window.document().expect("Could not get document");
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let base_uri = match self.base_uri(&document) {
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Some(base_uri) => base_uri,
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_ => return,
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};
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let url = if let Ok(new_url) = url_from_relative_url(&base_uri, &url) {
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new_url
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} else {
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return;
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};
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// If allowScriptAccess is disabled, we should reject the javascript scheme
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if !self.allow_script_access && url.scheme() == "javascript" {
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log::warn!("SWF tried to run a script, but script access is not allowed");
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return;
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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, window_spec) {
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(Some((navmethod, formvars)), window_spec) => {
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let form_url = self.pre_process_url(url).to_string();
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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 = document
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.create_element("form")
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.unwrap()
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.dyn_into::<web_sys::HtmlFormElement>()
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.unwrap();
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let _ = form.set_attribute(
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"method",
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match navmethod {
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NavigationMethod::Get => "get",
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NavigationMethod::Post => "post",
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},
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);
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let _ = form.set_attribute("action", &form_url);
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if let Some(target) = window_spec {
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let _ = form.set_attribute("target", &target);
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}
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for (k, v) in formvars.iter() {
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let hidden = document.create_element("input").unwrap();
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let _ = hidden.set_attribute("type", "hidden");
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let _ = hidden.set_attribute("name", k);
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let _ = hidden.set_attribute("value", v);
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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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(_, Some(ref window_name)) if !window_name.is_empty() => {
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let _ = window.open_with_url_and_target(url.as_str(), window_name);
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}
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_ => {
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let _ = window.location().assign(url.as_str());
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}
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};
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}
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}
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fn fetch(&self, url: &str, options: RequestOptions) -> OwnedFuture<Vec<u8>, Error> {
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let url = if let Ok(parsed_url) = Url::parse(url) {
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self.pre_process_url(parsed_url).to_string()
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} else {
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self.resolve_relative_url(url).to_string()
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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(match options.method() {
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NavigationMethod::Get => "GET",
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NavigationMethod::Post => "POST",
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});
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if let Some((data, mime)) = options.body() {
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let arraydata = ArrayBuffer::new(data.len() as u32);
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let u8data = Uint8Array::new(&arraydata);
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for (i, byte) in data.iter().enumerate() {
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u8data.fill(*byte, i as u32, i as u32 + 1);
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}
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let blobparts = Array::new();
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blobparts.push(&arraydata);
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let mut blobprops = BlobPropertyBag::new();
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blobprops.type_(mime);
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let datablob =
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Blob::new_with_buffer_source_sequence_and_options(&blobparts, &blobprops)
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.unwrap()
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.dyn_into()
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.unwrap();
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init.body(Some(&datablob));
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}
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let request = Request::new_with_str_and_init(&url, &init)
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.map_err(|_| Error::FetchError(format!("Unable to create request for {}", url)))?;
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let window = web_sys::window().unwrap();
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let fetchval = JsFuture::from(window.fetch_with_request(&request))
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.await
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.map_err(|_| Error::FetchError("Got JS error".to_string()))?;
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let resp: Response = fetchval.dyn_into().unwrap();
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if !resp.ok() {
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return Err(Error::FetchError(format!(
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"HTTP status is not ok, got {}",
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resp.status_text()
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)));
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}
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let data: ArrayBuffer = JsFuture::from(resp.array_buffer().unwrap())
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.await
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.map_err(|_| {
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Error::FetchError("Could not allocate array buffer for response".to_string())
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})?
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.dyn_into()
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.unwrap();
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let jsarray = Uint8Array::new(&data);
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let mut rust_array = vec![0; jsarray.length() as usize];
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jsarray.copy_to(&mut rust_array);
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Ok(rust_array)
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})
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}
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fn spawn_future(&mut self, future: OwnedFuture<(), Error>) {
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spawn_local(async move {
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if let Err(e) = future.await {
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log::error!("Asynchronous error occurred: {}", e);
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}
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})
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}
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fn resolve_relative_url<'a>(&self, url: &'a str) -> Cow<'a, str> {
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let window = web_sys::window().expect("window()");
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let document = window.document().expect("document()");
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if let Some(base_uri) = self.base_uri(&document) {
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if let Ok(new_url) = url_from_relative_url(&base_uri, url) {
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return String::from(new_url).into();
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}
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}
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url.into()
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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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log::error!("Url::set_scheme failed on: {}", url);
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}
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url
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}
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}
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