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//!
//! An aria2 websocket jsonrpc in Rust.
//!
//! [aria2 RPC docs](https://aria2.github.io/manual/en/html/aria2c.html#methods)
//!
//! ## Features
//!
//! - Almost all methods and structed responses
//! - Auto reconnect
//! - Ensures `on_complete` and `on_error` hook to be executed even after reconnected.
//! - Supports notifications
//!
//! ## Example
//!
//! ```no_run
//! use std::sync::Arc;
//!
//! use aria2_ws::{Client, Callbacks, TaskOptions};
//! use futures::FutureExt;
//! use serde_json::json;
//! use tokio::{spawn, sync::Semaphore};
//!
//! #[tokio::main]
//! async fn main() {
//! let client = Client::connect("ws://127.0.0.1:6800/jsonrpc", None)
//! .await
//! .unwrap();
//! let options = TaskOptions {
//! split: Some(2),
//! header: Some(vec!["Referer: https://www.pixiv.net/".to_string()]),
//! all_proxy: Some("http://127.0.0.1:10809".to_string()),
//! // Add extra options which are not included in TaskOptions.
//! extra_options: json!({"max-download-limit": "200K"})
//! .as_object()
//! .unwrap()
//! .clone(),
//! ..Default::default()
//! };
//!
//! // use `tokio::sync::Semaphore` to wait for all tasks to finish.
//! let semaphore = Arc::new(Semaphore::new(0));
//! client
//! .add_uri(
//! vec![
//! "https://i.pximg.net/img-original/img/2020/05/15/06/56/03/81572512_p0.png"
//! .to_string(),
//! ],
//! Some(options.clone()),
//! None,
//! Some(Callbacks {
//! on_complete: Some({
//! let s = semaphore.clone();
//! async move {
//! s.add_permits(1);
//! println!("Task 1 completed!");
//! }
//! .boxed()
//! }),
//! on_error: Some({
//! let s = semaphore.clone();
//! async move {
//! s.add_permits(1);
//! println!("Task 1 error!");
//! }
//! .boxed()
//! }),
//! }),
//! )
//! .await
//! .unwrap();
//!
//! // Will 404
//! client
//! .add_uri(
//! vec![
//! "https://i.pximg.net/img-original/img/2022/01/05/23/32/16/95326322_p0.pngxxxx"
//! .to_string(),
//! ],
//! Some(options.clone()),
//! None,
//! Some(Callbacks {
//! on_complete: Some({
//! let s = semaphore.clone();
//! async move {
//! s.add_permits(1);
//! println!("Task 2 completed!");
//! }
//! .boxed()
//! }),
//! on_error: Some({
//! let s = semaphore.clone();
//! async move {
//! s.add_permits(1);
//! println!("Task 2 error!");
//! }
//! .boxed()
//! }),
//! }),
//! )
//! .await
//! .unwrap();
//!
//! let mut not = client.subscribe_notifications();
//!
//! spawn(async move {
//! while let Ok(msg) = not.recv().await {
//! println!("Received notification {:?}", &msg);
//! }
//! });
//!
//! // Wait for 2 tasks to finish.
//! let _ = semaphore.acquire_many(2).await.unwrap();
//!
//! client.shutdown().await.unwrap();
//! }
//!
//! ```
mod callback;
mod client;
mod error;
mod method;
mod options;
pub mod response;
mod utils;
pub use error::Error;
pub use options::TaskOptions;
// Re-export `Map` for `TaskOptions`.
pub use callback::Callbacks;
pub use client::{Client, InnerClient};
pub use serde_json::Map;
use serde::{Deserialize, Serialize};
use serde_json::Value;
use snafu::OptionExt;
pub(crate) type Result<T> = std::result::Result<T, Error>;
#[derive(Serialize, Deserialize, Debug, Clone)]
pub struct RpcRequest {
pub id: Option<i32>,
pub jsonrpc: String,
pub method: String,
#[serde(default)]
pub params: Vec<Value>,
}
/// Error returned by RPC calls.
#[derive(Serialize, Deserialize, Debug, Clone)]
pub struct Aria2Error {
pub code: i32,
pub message: String,
}
impl std::fmt::Display for Aria2Error {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
write!(
f,
"aria2 responsed error: code {}: {}",
self.code, self.message
)
}
}
impl std::error::Error for Aria2Error {}
#[derive(Deserialize, Debug, Clone)]
pub struct RpcResponse {
pub id: Option<i32>,
pub jsonrpc: String,
pub result: Option<Value>,
pub error: Option<Aria2Error>,
}
/// Events about download progress from aria2.
#[derive(Debug, Clone, PartialEq, Eq, Copy, Hash)]
pub enum Event {
Start,
Pause,
Stop,
Complete,
Error,
/// This notification will be sent when a torrent download is complete but seeding is still going on.
BtComplete,
}
impl TryFrom<&str> for Event {
type Error = crate::Error;
fn try_from(value: &str) -> Result<Self> {
use Event::*;
let event = match value {
"aria2.onDownloadStart" => Start,
"aria2.onDownloadPause" => Pause,
"aria2.onDownloadStop" => Stop,
"aria2.onDownloadComplete" => Complete,
"aria2.onDownloadError" => Error,
"aria2.onBtDownloadComplete" => BtComplete,
_ => return error::ParseSnafu { value, to: "Event" }.fail(),
};
Ok(event)
}
}
#[derive(Debug, Clone, PartialEq, Eq)]
pub enum Notification {
Aria2 { gid: String, event: Event },
WebSocketConnected,
WebsocketClosed,
}
impl TryFrom<&RpcRequest> for Notification {
type Error = crate::Error;
fn try_from(req: &RpcRequest) -> Result<Self> {
let gid = (|| req.params.get(0)?.get("gid")?.as_str())()
.with_context(|| error::ParseSnafu {
value: format!("{:?}", req),
to: "Notification",
})?
.to_string();
let event = req.method.as_str().try_into()?;
Ok(Notification::Aria2 { gid, event })
}
}
#[cfg(test)]
mod tests {
fn check_if_send<T: Send + Sync>() {}
#[test]
fn t() {
check_if_send::<crate::error::Error>();
check_if_send::<crate::Client>();
}
}