295 lines
10 KiB
Rust
295 lines
10 KiB
Rust
use super::util::SurfResultExt as _;
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use crate::{editor::Buffer, language::LanguageRegistry, worktree::Worktree};
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use anyhow::{anyhow, Context, Result};
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use gpui::executor::Background;
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use gpui::{AsyncAppContext, ModelHandle, Task};
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use lazy_static::lazy_static;
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use postage::prelude::Stream;
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use smol::lock::Mutex;
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use std::collections::HashMap;
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use std::time::Duration;
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use std::{convert::TryFrom, future::Future, sync::Arc};
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use surf::Url;
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pub use zed_rpc::{proto, ConnectionId, PeerId, TypedEnvelope};
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use zed_rpc::{
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proto::{EnvelopedMessage, RequestMessage},
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rest, Peer, Receipt,
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};
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lazy_static! {
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static ref ZED_SERVER_URL: String =
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std::env::var("ZED_SERVER_URL").unwrap_or("https://zed.dev".to_string());
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}
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#[derive(Clone)]
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pub struct Client {
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peer: Arc<Peer>,
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pub state: Arc<Mutex<ClientState>>,
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}
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pub struct ClientState {
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connection_id: Option<ConnectionId>,
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pub shared_worktrees: HashMap<u64, ModelHandle<Worktree>>,
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pub shared_buffers: HashMap<PeerId, HashMap<usize, ModelHandle<Buffer>>>,
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pub language_registry: Arc<LanguageRegistry>,
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}
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impl Client {
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pub fn new(language_registry: Arc<LanguageRegistry>) -> Self {
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Self {
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peer: Peer::new(),
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state: Arc::new(Mutex::new(ClientState {
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connection_id: None,
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shared_worktrees: Default::default(),
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shared_buffers: Default::default(),
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language_registry,
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})),
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}
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}
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pub fn on_message<H, M>(&self, handler: H, cx: &mut gpui::MutableAppContext)
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where
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H: 'static + for<'a> MessageHandler<'a, M>,
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M: proto::EnvelopedMessage,
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{
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let this = self.clone();
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let mut messages = smol::block_on(this.peer.add_message_handler::<M>());
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cx.spawn(|mut cx| async move {
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while let Some(message) = messages.recv().await {
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if let Err(err) = handler.handle(message, &this, &mut cx).await {
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log::error!("error handling message: {:?}", err);
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}
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}
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})
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.detach();
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}
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pub async fn log_in_and_connect(&self, cx: &AsyncAppContext) -> surf::Result<ConnectionId> {
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if let Some(connection_id) = self.state.lock().await.connection_id {
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return Ok(connection_id);
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}
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let (user_id, access_token) = Self::login(cx.platform(), &cx.background_executor()).await?;
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let mut response = surf::get(format!(
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"{}{}",
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*ZED_SERVER_URL,
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&rest::GET_RPC_ADDRESS_PATH
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))
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.header(
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"Authorization",
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http_auth_basic::Credentials::new(&user_id, &access_token).as_http_header(),
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)
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.await
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.context("rpc address request failed")?;
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let rest::GetRpcAddressResponse { address } = response
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.body_json()
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.await
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.context("failed to parse rpc address response")?;
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self.connect(
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&address,
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user_id.parse()?,
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access_token,
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&cx.background_executor(),
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)
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.await
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}
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pub async fn connect(
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&self,
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address: &str,
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user_id: i32,
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access_token: String,
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executor: &Arc<Background>,
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) -> surf::Result<ConnectionId> {
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// TODO - If the `ZED_SERVER_URL` uses https, then wrap this stream in
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// a TLS stream using `native-tls`.
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let stream = smol::net::TcpStream::connect(&address).await?;
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log::info!("connected to rpc address {}", address);
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let connection_id = self.peer.add_connection(stream).await;
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executor
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.spawn(self.peer.handle_messages(connection_id))
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.detach();
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let auth_response = self
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.peer
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.request(
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connection_id,
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proto::Auth {
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user_id,
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access_token,
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},
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)
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.await
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.context("rpc auth request failed")?;
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if !auth_response.credentials_valid {
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Err(anyhow!("failed to authenticate with RPC server"))?;
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}
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Ok(connection_id)
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}
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pub fn login(
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platform: Arc<dyn gpui::Platform>,
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executor: &Arc<gpui::executor::Background>,
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) -> Task<Result<(String, String)>> {
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let executor = executor.clone();
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executor.clone().spawn(async move {
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if let Some((user_id, access_token)) = platform.read_credentials(&ZED_SERVER_URL) {
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log::info!("already signed in. user_id: {}", user_id);
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return Ok((user_id, String::from_utf8(access_token).unwrap()));
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}
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// Generate a pair of asymmetric encryption keys. The public key will be used by the
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// zed server to encrypt the user's access token, so that it can'be intercepted by
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// any other app running on the user's device.
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let (public_key, private_key) =
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zed_rpc::auth::keypair().expect("failed to generate keypair for auth");
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let public_key_string =
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String::try_from(public_key).expect("failed to serialize public key for auth");
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// Start an HTTP server to receive the redirect from Zed's sign-in page.
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let server = tiny_http::Server::http("127.0.0.1:0").expect("failed to find open port");
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let port = server.server_addr().port();
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// Open the Zed sign-in page in the user's browser, with query parameters that indicate
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// that the user is signing in from a Zed app running on the same device.
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platform.open_url(&format!(
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"{}/sign_in?native_app_port={}&native_app_public_key={}",
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*ZED_SERVER_URL, port, public_key_string
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));
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// Receive the HTTP request from the user's browser. Retrieve the user id and encrypted
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// access token from the query params.
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//
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// TODO - Avoid ever starting more than one HTTP server. Maybe switch to using a
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// custom URL scheme instead of this local HTTP server.
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let (user_id, access_token) = executor
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.spawn(async move {
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if let Some(req) = server.recv_timeout(Duration::from_secs(10 * 60))? {
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let path = req.url();
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let mut user_id = None;
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let mut access_token = None;
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let url = Url::parse(&format!("http://example.com{}", path))
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.context("failed to parse login notification url")?;
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for (key, value) in url.query_pairs() {
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if key == "access_token" {
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access_token = Some(value.to_string());
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} else if key == "user_id" {
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user_id = Some(value.to_string());
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}
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}
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req.respond(
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tiny_http::Response::from_string(LOGIN_RESPONSE).with_header(
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tiny_http::Header::from_bytes("Content-Type", "text/html").unwrap(),
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),
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)
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.context("failed to respond to login http request")?;
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Ok((
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user_id.ok_or_else(|| anyhow!("missing user_id parameter"))?,
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access_token
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.ok_or_else(|| anyhow!("missing access_token parameter"))?,
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))
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} else {
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Err(anyhow!("didn't receive login redirect"))
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}
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})
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.await?;
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let access_token = private_key
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.decrypt_string(&access_token)
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.context("failed to decrypt access token")?;
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platform.activate(true);
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platform.write_credentials(&ZED_SERVER_URL, &user_id, access_token.as_bytes());
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Ok((user_id.to_string(), access_token))
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})
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}
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pub fn send<T: EnvelopedMessage>(
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&self,
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connection_id: ConnectionId,
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message: T,
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) -> impl Future<Output = Result<()>> {
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self.peer.send(connection_id, message)
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}
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pub fn request<T: RequestMessage>(
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&self,
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connection_id: ConnectionId,
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request: T,
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) -> impl Future<Output = Result<T::Response>> {
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self.peer.request(connection_id, request)
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}
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pub fn respond<T: RequestMessage>(
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&self,
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receipt: Receipt<T>,
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response: T::Response,
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) -> impl Future<Output = Result<()>> {
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self.peer.respond(receipt, response)
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}
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}
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pub trait MessageHandler<'a, M: proto::EnvelopedMessage> {
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type Output: 'a + Future<Output = anyhow::Result<()>>;
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fn handle(
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&self,
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message: TypedEnvelope<M>,
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rpc: &'a Client,
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cx: &'a mut gpui::AsyncAppContext,
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) -> Self::Output;
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}
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impl<'a, M, F, Fut> MessageHandler<'a, M> for F
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where
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M: proto::EnvelopedMessage,
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F: Fn(TypedEnvelope<M>, &'a Client, &'a mut gpui::AsyncAppContext) -> Fut,
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Fut: 'a + Future<Output = anyhow::Result<()>>,
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{
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type Output = Fut;
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fn handle(
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&self,
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message: TypedEnvelope<M>,
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rpc: &'a Client,
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cx: &'a mut gpui::AsyncAppContext,
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) -> Self::Output {
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(self)(message, rpc, cx)
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}
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}
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const WORKTREE_URL_PREFIX: &'static str = "zed://worktrees/";
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pub fn encode_worktree_url(id: u64, access_token: &str) -> String {
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format!("{}{}/{}", WORKTREE_URL_PREFIX, id, access_token)
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}
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pub fn decode_worktree_url(url: &str) -> Option<(u64, String)> {
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let path = url.strip_prefix(WORKTREE_URL_PREFIX)?;
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let mut parts = path.split('/');
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let id = parts.next()?.parse::<u64>().ok()?;
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let access_token = parts.next()?;
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if access_token.is_empty() {
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return None;
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}
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Some((id, access_token.to_string()))
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}
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const LOGIN_RESPONSE: &'static str = "
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<!DOCTYPE html>
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<html>
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<script>window.close();</script>
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</html>
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";
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#[test]
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fn test_encode_and_decode_worktree_url() {
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let url = encode_worktree_url(5, "deadbeef");
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assert_eq!(decode_worktree_url(&url), Some((5, "deadbeef".to_string())));
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assert_eq!(decode_worktree_url("not://the-right-format"), None);
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}
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