wip

Cargo.lock

@@ -84,6 +84,28 @@ version = "1.0.75"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a4668cab20f66d8d020e1fbc0ebe47217433c1b6c8f2040faf858554e394ace6"
 
+[[package]]
+name = "async-stream"
+version = "0.3.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cd56dd203fef61ac097dd65721a419ddccb106b2d2b70ba60a6b529f03961a51"
+dependencies = [
+ "async-stream-impl",
+ "futures-core",
+ "pin-project-lite",
+]
+
+[[package]]
+name = "async-stream-impl"
+version = "0.3.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "16e62a023e7c117e27523144c5d2459f4397fcc3cab0085af8e2224f643a0193"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.40",
+]
+
 [[package]]
 name = "async-trait"
 version = "0.1.74"
@@ -596,7 +618,8 @@ dependencies = [
 [[package]]
 name = "imbl-value"
 version = "0.1.0"
-source = "git+https://github.com/Start9Labs/imbl-value.git#929395141c3a882ac366c12ac9402d0ebaa2201b"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8b6d3d8cdfd1ac46aab6195692baf9c65dd34dcc7e7ddfb426a2c014736ba90c"
 dependencies = [
  "imbl",
  "serde",
@@ -929,6 +952,7 @@ dependencies = [
 name = "rpc-toolkit"
 version = "0.2.3"
 dependencies = [
+ "async-stream",
  "async-trait",
  "clap",
  "futures",

rpc-toolkit/Cargo.toml

@@ -16,11 +16,12 @@ cbor = ["serde_cbor"]
 default = ["cbor"]
 
 [dependencies]
+async-stream = "0.3"
 async-trait = "0.1"
 clap = "4"
 futures = "0.3"
 hyper = { version = "1", features = ["server", "http1", "http2", "client"] }
-imbl-value = { git = "https://github.com/Start9Labs/imbl-value.git" }
+imbl-value = "0.1"
 lazy_static = "1.4"
 openssl = { version = "0.10", features = ["vendored"] }
 reqwest = { version = "0.11" }

rpc-toolkit/src/cli.rs

@@ -14,7 +14,7 @@ use crate::command::{AsyncCommand, DynCommand, LeafCommand, ParentInfo};
 use crate::util::{combine, invalid_params, parse_error};
 use crate::{CliBindings, ParentChain};
 
-impl<Context> DynCommand<Context> {
+impl<Context: crate::Context> DynCommand<Context> {
     fn cli_app(&self) -> Option<clap::Command> {
         if let Some(cli) = &self.cli {
             Some(
@@ -54,11 +54,11 @@ impl<Context> DynCommand<Context> {
     }
 }
 
-struct CliApp<Context> {
+struct CliApp<Context: crate::Context> {
     cli: CliBindings,
     commands: Vec<DynCommand<Context>>,
 }
-impl<Context> CliApp<Context> {
+impl<Context: crate::Context> CliApp<Context> {
     pub fn new<Cmd: FromArgMatches + CommandFactory + Serialize>(
         commands: Vec<DynCommand<Context>>,
     ) -> Self {
@@ -90,11 +90,11 @@ impl<Context> CliApp<Context> {
     }
 }
 
-pub struct CliAppAsync<Context> {
+pub struct CliAppAsync<Context: crate::Context> {
     app: CliApp<Context>,
     make_ctx: Box<dyn FnOnce(Value) -> BoxFuture<'static, Result<Context, RpcError>> + Send>,
 }
-impl<Context> CliAppAsync<Context> {
+impl<Context: crate::Context> CliAppAsync<Context> {
     pub fn new<
         Cmd: FromArgMatches + CommandFactory + Serialize + DeserializeOwned + Send,
         F: FnOnce(Cmd) -> Fut + Send + 'static,
@@ -140,11 +140,11 @@ impl<Context> CliAppAsync<Context> {
     }
 }
 
-pub struct CliAppSync<Context> {
+pub struct CliAppSync<Context: crate::Context> {
     app: CliApp<Context>,
     make_ctx: Box<dyn FnOnce(Value) -> Result<Context, RpcError> + Send>,
 }
-impl<Context> CliAppSync<Context> {
+impl<Context: crate::Context> CliAppSync<Context> {
     pub fn new<
         Cmd: FromArgMatches + CommandFactory + Serialize + DeserializeOwned + Send,
         F: FnOnce(Cmd) -> Result<Context, RpcError> + Send + 'static,
@@ -187,11 +187,11 @@ impl<Context> CliAppSync<Context> {
 }
 
 #[async_trait::async_trait]
-pub trait CliContext {
+pub trait CliContext: crate::Context {
     async fn call_remote(&self, method: &str, params: Value) -> Result<Value, RpcError>;
 }
 
-pub trait CliContextHttp {
+pub trait CliContextHttp: crate::Context {
     fn client(&self) -> &Client;
     fn url(&self) -> Url;
 }
@@ -243,6 +243,7 @@ impl<T: CliContextHttp + Sync> CliContext for T {
 }
 
 pub trait RemoteCommand<Context: CliContext>: LeafCommand {
+    fn metadata() -> Context::Metadata;
     fn subcommands(chain: ParentChain<Self>) -> Vec<DynCommand<Context>> {
         drop(chain);
         Vec::new()
@@ -257,6 +258,9 @@ where
     T::Err: From<RpcError>,
     Context: CliContext + Send + 'static,
 {
+    fn metadata() -> Context::Metadata {
+        T::metadata()
+    }
     async fn implementation(
         self,
         ctx: Context,
@@ -276,4 +280,7 @@ where
         )
         .map_err(parse_error)?)
     }
+    fn subcommands(chain: ParentChain<Self>) -> Vec<DynCommand<Context>> {
+        T::subcommands(chain)
+    }
 }

rpc-toolkit/src/command.rs

@@ -1,4 +1,5 @@
 use std::marker::PhantomData;
+use std::sync::Arc;
 
 use clap::{ArgMatches, CommandFactory, FromArgMatches};
 use futures::future::BoxFuture;
@@ -12,18 +13,22 @@ use crate::util::{extract, Flat};
 
 /// Stores a command's implementation for a given context
 /// Can be created from anything that implements ParentCommand, AsyncCommand, or SyncCommand
-pub struct DynCommand<Context> {
+pub struct DynCommand<Context: crate::Context> {
     pub(crate) name: &'static str,
+    pub(crate) metadata: Context::Metadata,
     pub(crate) implementation: Option<Implementation<Context>>,
     pub(crate) cli: Option<CliBindings>,
     pub(crate) subcommands: Vec<Self>,
 }
 
 pub(crate) struct Implementation<Context> {
-    pub(crate) async_impl: Box<
-        dyn Fn(Context, Vec<&'static str>, Value) -> BoxFuture<'static, Result<Value, RpcError>>,
+    pub(crate) async_impl: Arc<
+        dyn Fn(Context, Vec<&'static str>, Value) -> BoxFuture<'static, Result<Value, RpcError>>
+            + Send
+            + Sync,
     >,
-    pub(crate) sync_impl: Box<dyn Fn(Context, Vec<&'static str>, Value) -> Result<Value, RpcError>>,
+    pub(crate) sync_impl:
+        Box<dyn Fn(Context, Vec<&'static str>, Value) -> Result<Value, RpcError> + Send + Sync>,
 }
 
 pub(crate) struct CliBindings {
@@ -107,15 +112,17 @@ where
 }
 
 /// Implement this for a command that has no implementation, but simply exists to organize subcommands
-pub trait ParentCommand<Context>: Command {
+pub trait ParentCommand<Context: crate::Context>: Command {
+    fn metadata() -> Context::Metadata;
     fn subcommands(chain: ParentChain<Self>) -> Vec<DynCommand<Context>>;
 }
-impl<Context> DynCommand<Context> {
+impl<Context: crate::Context> DynCommand<Context> {
     pub fn from_parent<
         Cmd: ParentCommand<Context> + FromArgMatches + CommandFactory + Serialize,
     >() -> Self {
         Self {
             name: Cmd::NAME,
+            metadata: Cmd::metadata(),
             implementation: None,
             cli: Some(CliBindings::from_parent::<Cmd>()),
             subcommands: Cmd::subcommands(ParentChain::<Cmd>(PhantomData)),
@@ -124,6 +131,7 @@ impl<Context> DynCommand<Context> {
     pub fn from_parent_no_cli<Cmd: ParentCommand<Context>>() -> Self {
         Self {
             name: Cmd::NAME,
+            metadata: Cmd::metadata(),
             implementation: None,
             cli: None,
             subcommands: Cmd::subcommands(ParentChain::<Cmd>(PhantomData)),
@@ -140,7 +148,8 @@ pub trait LeafCommand: Command {
 
 /// Implement this if your Command's implementation is async
 #[async_trait::async_trait]
-pub trait AsyncCommand<Context>: LeafCommand {
+pub trait AsyncCommand<Context: crate::Context>: LeafCommand {
+    fn metadata() -> Context::Metadata;
     async fn implementation(
         self,
         ctx: Context,
@@ -155,7 +164,7 @@ impl<Context: crate::Context> Implementation<Context> {
     fn for_async<Cmd: AsyncCommand<Context>>(contains: Contains<Cmd::Parent>) -> Self {
         drop(contains);
         Self {
-            async_impl: Box::new(|ctx, parent_method, params| {
+            async_impl: Arc::new(|ctx, parent_method, params| {
                 async move {
                     let parent_params = extract::<Cmd::Parent>(&params)?;
                     imbl_value::to_value(
@@ -211,6 +220,7 @@ impl<Context: crate::Context> DynCommand<Context> {
     ) -> Self {
         Self {
             name: Cmd::NAME,
+            metadata: Cmd::metadata(),
             implementation: Some(Implementation::for_async::<Cmd>(contains)),
             cli: Some(CliBindings::from_leaf::<Cmd>()),
             subcommands: Cmd::subcommands(ParentChain::<Cmd>(PhantomData)),
@@ -219,6 +229,7 @@ impl<Context: crate::Context> DynCommand<Context> {
     pub fn from_async_no_cli<Cmd: AsyncCommand<Context>>(contains: Contains<Cmd::Parent>) -> Self {
         Self {
             name: Cmd::NAME,
+            metadata: Cmd::metadata(),
             implementation: Some(Implementation::for_async::<Cmd>(contains)),
             cli: None,
             subcommands: Cmd::subcommands(ParentChain::<Cmd>(PhantomData)),
@@ -227,8 +238,9 @@ impl<Context: crate::Context> DynCommand<Context> {
 }
 
 /// Implement this if your Command's implementation is not async
-pub trait SyncCommand<Context>: LeafCommand {
+pub trait SyncCommand<Context: crate::Context>: LeafCommand {
     const BLOCKING: bool;
+    fn metadata() -> Context::Metadata;
     fn implementation(
         self,
         ctx: Context,
@@ -239,12 +251,12 @@ pub trait SyncCommand<Context>: LeafCommand {
         Vec::new()
     }
 }
-impl<Context: Send + 'static> Implementation<Context> {
+impl<Context: crate::Context> Implementation<Context> {
     fn for_sync<Cmd: SyncCommand<Context>>(contains: Contains<Cmd::Parent>) -> Self {
         drop(contains);
         Self {
             async_impl: if Cmd::BLOCKING {
-                Box::new(|ctx, parent_method, params| {
+                Arc::new(|ctx, parent_method, params| {
                     tokio::task::spawn_blocking(move || {
                         let parent_params = extract::<Cmd::Parent>(&params)?;
                         imbl_value::to_value(
@@ -276,7 +288,7 @@ impl<Context: Send + 'static> Implementation<Context> {
                     .boxed()
                 })
             } else {
-                Box::new(|ctx, parent_method, params| {
+                Arc::new(|ctx, parent_method, params| {
                     async move {
                         let parent_params = extract::<Cmd::Parent>(&params)?;
                         imbl_value::to_value(
@@ -327,12 +339,13 @@ impl<Context: Send + 'static> Implementation<Context> {
         }
     }
 }
-impl<Context: Send + 'static> DynCommand<Context> {
+impl<Context: crate::Context> DynCommand<Context> {
     pub fn from_sync<Cmd: SyncCommand<Context> + FromArgMatches + CommandFactory + Serialize>(
         contains: Contains<Cmd::Parent>,
     ) -> Self {
         Self {
             name: Cmd::NAME,
+            metadata: Cmd::metadata(),
             implementation: Some(Implementation::for_sync::<Cmd>(contains)),
             cli: Some(CliBindings::from_leaf::<Cmd>()),
             subcommands: Cmd::subcommands(ParentChain::<Cmd>(PhantomData)),
@@ -341,6 +354,7 @@ impl<Context: Send + 'static> DynCommand<Context> {
     pub fn from_sync_no_cli<Cmd: SyncCommand<Context>>(contains: Contains<Cmd::Parent>) -> Self {
         Self {
             name: Cmd::NAME,
+            metadata: Cmd::metadata(),
             implementation: Some(Implementation::for_sync::<Cmd>(contains)),
             cli: None,
             subcommands: Cmd::subcommands(ParentChain::<Cmd>(PhantomData)),

rpc-toolkit/src/context.rs

@@ -1,6 +1,7 @@
 use tokio::runtime::Handle;
 
 pub trait Context: Send + 'static {
+    type Metadata: Default;
     fn runtime(&self) -> Handle {
         Handle::current()
     }

rpc-toolkit/src/lib.rs

@@ -23,6 +23,7 @@ pub use context::Context;
 ///
 /// See also: [arg](rpc_toolkit_macro::arg), [context](rpc_toolkit_macro::context)
 pub use rpc_toolkit_macro::command;
+pub use server::*;
 pub use {clap, futures, hyper, reqwest, serde, serde_json, tokio, url, yajrc};
 
 mod cli;
@@ -31,4 +32,5 @@ mod command;
 mod context;
 // mod metadata;
 // pub mod rpc_server_helpers;
+mod server;
 mod util;

rpc-toolkit/src/server/mod.rs

@@ -0,0 +1,224 @@
+use std::sync::Arc;
+
+use futures::future::{join_all, BoxFuture};
+use futures::stream::{BoxStream, Fuse};
+use futures::{Future, FutureExt, Stream, StreamExt, TryStreamExt};
+use imbl_value::Value;
+use tokio::runtime::Handle;
+use tokio::task::JoinHandle;
+use yajrc::{AnyParams, RpcError, RpcMethod, RpcRequest, RpcResponse, SingleOrBatchRpcRequest};
+
+use crate::util::{invalid_request, parse_error};
+use crate::DynCommand;
+
+mod http;
+mod socket;
+
+pub use http::*;
+pub use socket::*;
+
+impl<Context: crate::Context> DynCommand<Context> {
+    fn cmd_from_method(
+        &self,
+        method: &[&str],
+        parent_method: Vec<&'static str>,
+    ) -> Result<(Vec<&'static str>, &DynCommand<Context>), RpcError> {
+        let mut ret_method = parent_method;
+        ret_method.push(self.name);
+        if let Some((cmd, rest)) = method.split_first() {
+            self.subcommands
+                .iter()
+                .find(|c| c.name == *cmd)
+                .ok_or(yajrc::METHOD_NOT_FOUND_ERROR)?
+                .cmd_from_method(rest, ret_method)
+        } else {
+            Ok((ret_method, self))
+        }
+    }
+}
+
+pub struct Server<Context: crate::Context> {
+    commands: Vec<DynCommand<Context>>,
+    make_ctx: Arc<dyn Fn() -> BoxFuture<'static, Result<Context, RpcError>> + Send + Sync>,
+}
+impl<Context: crate::Context> Server<Context> {
+    pub fn new<
+        F: Fn() -> Fut + Send + Sync + 'static,
+        Fut: Future<Output = Result<Context, RpcError>> + Send + 'static,
+    >(
+        commands: Vec<DynCommand<Context>>,
+        make_ctx: F,
+    ) -> Self {
+        Server {
+            commands,
+            make_ctx: Arc::new(move || make_ctx().boxed()),
+        }
+    }
+
+    pub fn handle_command(
+        &self,
+        method: &str,
+        params: Value,
+    ) -> impl Future<Output = Result<Value, RpcError>> + Send + 'static {
+        let from_self = (|| {
+            let method: Vec<_> = method.split(".").collect();
+            let (cmd, rest) = method.split_first().ok_or(yajrc::METHOD_NOT_FOUND_ERROR)?;
+            let (method, cmd) = self
+                .commands
+                .iter()
+                .find(|c| c.name == *cmd)
+                .ok_or(yajrc::METHOD_NOT_FOUND_ERROR)?
+                .cmd_from_method(rest, Vec::new())?;
+            Ok::<_, RpcError>((
+                cmd.implementation
+                    .as_ref()
+                    .ok_or(yajrc::METHOD_NOT_FOUND_ERROR)?
+                    .async_impl
+                    .clone(),
+                self.make_ctx.clone(),
+                method,
+                params,
+            ))
+        })();
+
+        async move {
+            let (implementation, make_ctx, method, params) = from_self?;
+            implementation(make_ctx().await?, method, params).await
+        }
+    }
+
+    fn handle_single_request(
+        &self,
+        RpcRequest { id, method, params }: RpcRequest,
+    ) -> impl Future<Output = RpcResponse> + Send + 'static {
+        let handle = (|| {
+            Ok::<_, RpcError>(self.handle_command(
+                method.as_str(),
+                match params {
+                    AnyParams::Named(a) => serde_json::Value::Object(a).into(),
+                    _ => {
+                        return Err(RpcError {
+                            data: Some("positional parameters unsupported".into()),
+                            ..yajrc::INVALID_PARAMS_ERROR
+                        })
+                    }
+                },
+            ))
+        })();
+        async move {
+            RpcResponse {
+                id,
+                result: match handle {
+                    Ok(handle) => handle.await.map(serde_json::Value::from),
+                    Err(e) => Err(e),
+                },
+            }
+        }
+    }
+
+    pub fn handle(&self, request: Value) -> BoxFuture<'static, Result<Value, RpcError>> {
+        let request =
+            imbl_value::from_value::<SingleOrBatchRpcRequest>(request).map_err(invalid_request);
+        match request {
+            Ok(SingleOrBatchRpcRequest::Single(req)) => {
+                let fut = self.handle_single_request(req);
+                async { imbl_value::to_value(&fut.await).map_err(parse_error) }.boxed()
+            }
+            Ok(SingleOrBatchRpcRequest::Batch(reqs)) => {
+                let futs: Vec<_> = reqs
+                    .into_iter()
+                    .map(|req| self.handle_single_request(req))
+                    .collect();
+                async { imbl_value::to_value(&join_all(futs).await).map_err(parse_error) }.boxed()
+            }
+            Err(e) => async { Err(e) }.boxed(),
+        }
+    }
+
+    pub fn stream<'a>(
+        &'a self,
+        requests: impl Stream<Item = Result<Value, RpcError>> + Send + 'a,
+    ) -> impl Stream<Item = Result<Value, RpcError>> + 'a {
+        let mut running = RunningCommands::default();
+        let mut requests = requests.boxed().fuse();
+        async fn next<'a, Context: crate::Context>(
+            server: &'a Server<Context>,
+            running: &mut RunningCommands,
+            requests: &mut Fuse<BoxStream<'a, Result<Value, RpcError>>>,
+        ) -> Result<Option<Value>, RpcError> {
+            loop {
+                tokio::select! {
+                    req = requests.try_next() => {
+                        let req = req?;
+                        if let Some(req) = req {
+                            running.running.push(tokio::spawn(server.handle(req)));
+                        } else {
+                            running.closed = true;
+                        }
+                    }
+                    res = running.try_next() => {
+                        return res;
+                    }
+                }
+            }
+        }
+        async_stream::try_stream! {
+            while let Some(res) = next(self, &mut running, &mut requests).await? {
+                yield res;
+            }
+        }
+    }
+}
+
+#[derive(Default)]
+struct RunningCommands {
+    closed: bool,
+    running: Vec<JoinHandle<Result<Value, RpcError>>>,
+}
+
+impl Stream for RunningCommands {
+    type Item = Result<Value, RpcError>;
+    fn poll_next(
+        mut self: std::pin::Pin<&mut Self>,
+        cx: &mut std::task::Context<'_>,
+    ) -> std::task::Poll<Option<Self::Item>> {
+        let item = self
+            .running
+            .iter_mut()
+            .enumerate()
+            .find_map(|(i, f)| match f.poll_unpin(cx) {
+                std::task::Poll::Pending => None,
+                std::task::Poll::Ready(e) => Some((
+                    i,
+                    e.map_err(|e| RpcError {
+                        data: Some(e.to_string().into()),
+                        ..yajrc::INTERNAL_ERROR
+                    })
+                    .and_then(|a| a),
+                )),
+            });
+        match item {
+            Some((idx, res)) => {
+                drop(self.running.swap_remove(idx));
+                std::task::Poll::Ready(Some(res))
+            }
+            None => {
+                if !self.closed || !self.running.is_empty() {
+                    std::task::Poll::Pending
+                } else {
+                    std::task::Poll::Ready(None)
+                }
+            }
+        }
+    }
+}
+impl Drop for RunningCommands {
+    fn drop(&mut self) {
+        for hdl in &self.running {
+            hdl.abort();
+        }
+        if let Ok(rt) = Handle::try_current() {
+            rt.block_on(join_all(std::mem::take(&mut self.running).into_iter()));
+        }
+    }
+}

rpc-toolkit/src/server/socket.rs

@@ -0,0 +1,25 @@
+use futures::{AsyncWrite, Future, Stream};
+use tokio::io::AsyncRead;
+use tokio::sync::oneshot;
+use yajrc::RpcError;
+
+use crate::Server;
+
+pub struct ShutdownHandle(oneshot::Sender<()>);
+
+pub struct SocketServer<Context: crate::Context> {
+    server: Server<Context>,
+}
+impl<Context: crate::Context> SocketServer<Context> {
+    pub fn run_json<T: AsyncRead + AsyncWrite>(
+        &self,
+        listener: impl Stream<Item = T>,
+    ) -> (ShutdownHandle, impl Future<Output = Result<(), RpcError>>) {
+        let (shutdown_send, shutdown_recv) = oneshot::channel();
+        (ShutdownHandle(shutdown_send), async move {
+            //asdf
+            //adf
+            Ok(())
+        })
+    }
+}

rpc-toolkit/src/util.rs

@@ -35,6 +35,13 @@ pub fn invalid_params(e: imbl_value::Error) -> RpcError {
     }
 }
 
+pub fn invalid_request(e: imbl_value::Error) -> RpcError {
+    RpcError {
+        data: Some(e.to_string().into()),
+        ..yajrc::INVALID_REQUEST_ERROR
+    }
+}
+
 pub fn parse_error(e: imbl_value::Error) -> RpcError {
     RpcError {
         data: Some(e.to_string().into()),