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ws.rs
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ws.rs
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use std::{ops::*, sync::Arc};
use wasm_bindgen::{prelude::*, JsCast};
use web_sys::{MessageEvent, WebSocket as WebSocketSys};
#[derive(Clone)]
pub struct WebSocket {
sys: WebSocketSys,
}
impl WebSocket {
pub fn new(url: &str) -> Result<Self, String> {
// Open the web socket
let ws_sys = WebSocketSys::new(url).map_err(|err| format!("{:?}", err))?;
Ok(Self { sys: ws_sys })
}
}
impl WebSocket {
pub fn set_onopen(&mut self, mut callback: Box<dyn FnMut() + Send + Sync>) {
let callback = Closure::wrap(Box::new(move |_e: web_sys::ProgressEvent| {
callback.deref_mut()();
}) as Box<dyn FnMut(web_sys::ProgressEvent)>);
self.sys.set_onopen(Some(callback.as_ref().unchecked_ref()));
callback.forget();
}
pub fn set_onclose(&mut self, callback: Box<dyn Fn() + Send + Sync>) {
let callback = Closure::wrap(Box::new(move |_e: web_sys::ProgressEvent| {
callback.deref()();
}) as Box<dyn FnMut(web_sys::ProgressEvent)>);
self.sys
.set_onclose(Some(callback.as_ref().unchecked_ref()));
callback.forget();
}
pub fn set_onmessage(&mut self, callback: Box<dyn Fn(Vec<u8>) + Send + Sync>) {
let callback = Arc::new(callback);
let fr = web_sys::FileReader::new().unwrap();
let fr_c = fr.clone();
let onloadend_cb = {
let callback = callback.clone();
Closure::wrap(Box::new(move |_e: web_sys::ProgressEvent| {
let array = js_sys::Uint8Array::new(&fr_c.result().unwrap());
let data = array.to_vec();
callback.deref()(data);
}) as Box<dyn FnMut(web_sys::ProgressEvent)>)
};
fr.set_onloadend(Some(onloadend_cb.as_ref().unchecked_ref()));
onloadend_cb.forget();
// Attach the message process
let onmessage_callback = {
let callback = callback.clone();
Closure::wrap(Box::new(move |e: MessageEvent| {
if let Ok(abuf) = e.data().dyn_into::<js_sys::ArrayBuffer>() {
let data = js_sys::Uint8Array::new(&abuf).to_vec();
callback.deref()(data);
} else if let Ok(blob) = e.data().dyn_into::<web_sys::Blob>() {
fr.read_as_array_buffer(&blob).expect("blob not readable");
} else if let Ok(txt) = e.data().dyn_into::<js_sys::JsString>() {
tracing::debug!(%txt, "message event, received Text");
} else {
tracing::debug!("websocket received unknown message type");
}
}) as Box<dyn FnMut(MessageEvent)>)
};
self.sys.set_binary_type(web_sys::BinaryType::Arraybuffer);
self.sys
.set_onmessage(Some(onmessage_callback.as_ref().unchecked_ref()));
onmessage_callback.forget();
}
pub fn send(&mut self, data: Vec<u8>) -> Result<(), String> {
let data_len = data.len();
let array = js_sys::Uint8Array::new_with_length(data_len as u32);
array.copy_from(&data[..]);
self.sys
.send_with_array_buffer(&array.buffer())
.map_err(|err| format!("{:?}", err))
}
}