mirror of
https://github.com/denoland/deno.git
synced 2024-12-28 18:19:08 -05:00
110 lines
3.7 KiB
Rust
110 lines
3.7 KiB
Rust
// Copyright 2018-2021 the Deno authors. All rights reserved. MIT license.
|
|
|
|
use crate::error::AnyError;
|
|
use crate::serialize_op_result;
|
|
use crate::Op;
|
|
use crate::OpFn;
|
|
use crate::OpPayload;
|
|
use crate::OpState;
|
|
use crate::ZeroCopyBuf;
|
|
use serde::de::DeserializeOwned;
|
|
use serde::Serialize;
|
|
use std::cell::RefCell;
|
|
use std::future::Future;
|
|
use std::rc::Rc;
|
|
|
|
/// Creates an op that passes data synchronously using JSON.
|
|
///
|
|
/// The provided function `op_fn` has the following parameters:
|
|
/// * `&mut OpState`: the op state, can be used to read/write resources in the runtime from an op.
|
|
/// * `V`: the deserializable value that is passed to the Rust function.
|
|
/// * `&mut [ZeroCopyBuf]`: raw bytes passed along, usually not needed if the JSON value is used.
|
|
///
|
|
/// `op_fn` returns a serializable value, which is directly returned to JavaScript.
|
|
///
|
|
/// When registering an op like this...
|
|
/// ```ignore
|
|
/// let mut runtime = JsRuntime::new(...);
|
|
/// runtime.register_op("hello", deno_core::json_op_sync(Self::hello_op));
|
|
/// ```
|
|
///
|
|
/// ...it can be invoked from JS using the provided name, for example:
|
|
/// ```js
|
|
/// Deno.core.ops();
|
|
/// let result = Deno.core.jsonOpSync("function_name", args);
|
|
/// ```
|
|
///
|
|
/// The `Deno.core.ops()` statement is needed once before any op calls, for initialization.
|
|
/// A more complete example is available in the examples directory.
|
|
pub fn json_op_sync<F, V, R>(op_fn: F) -> Box<OpFn>
|
|
where
|
|
F: Fn(&mut OpState, V, Option<ZeroCopyBuf>) -> Result<R, AnyError> + 'static,
|
|
V: DeserializeOwned,
|
|
R: Serialize + 'static,
|
|
{
|
|
Box::new(move |state, payload, buf| -> Op {
|
|
let result = payload
|
|
.deserialize()
|
|
.and_then(|args| op_fn(&mut state.borrow_mut(), args, buf));
|
|
Op::Sync(serialize_op_result(result, state))
|
|
})
|
|
}
|
|
|
|
/// Creates an op that passes data asynchronously using JSON.
|
|
///
|
|
/// The provided function `op_fn` has the following parameters:
|
|
/// * `Rc<RefCell<OpState>`: the op state, can be used to read/write resources in the runtime from an op.
|
|
/// * `V`: the deserializable value that is passed to the Rust function.
|
|
/// * `BufVec`: raw bytes passed along, usually not needed if the JSON value is used.
|
|
///
|
|
/// `op_fn` returns a future, whose output is a serializable value. This value will be asynchronously
|
|
/// returned to JavaScript.
|
|
///
|
|
/// When registering an op like this...
|
|
/// ```ignore
|
|
/// let mut runtime = JsRuntime::new(...);
|
|
/// runtime.register_op("hello", deno_core::json_op_async(Self::hello_op));
|
|
/// ```
|
|
///
|
|
/// ...it can be invoked from JS using the provided name, for example:
|
|
/// ```js
|
|
/// Deno.core.ops();
|
|
/// let future = Deno.core.jsonOpAsync("function_name", args);
|
|
/// ```
|
|
///
|
|
/// The `Deno.core.ops()` statement is needed once before any op calls, for initialization.
|
|
/// A more complete example is available in the examples directory.
|
|
pub fn json_op_async<F, V, R, RV>(op_fn: F) -> Box<OpFn>
|
|
where
|
|
F: Fn(Rc<RefCell<OpState>>, V, Option<ZeroCopyBuf>) -> R + 'static,
|
|
V: DeserializeOwned,
|
|
R: Future<Output = Result<RV, AnyError>> + 'static,
|
|
RV: Serialize + 'static,
|
|
{
|
|
let try_dispatch_op = move |state: Rc<RefCell<OpState>>,
|
|
p: OpPayload,
|
|
buf: Option<ZeroCopyBuf>|
|
|
-> Result<Op, AnyError> {
|
|
// Parse args
|
|
let args = p.deserialize()?;
|
|
|
|
use crate::futures::FutureExt;
|
|
let fut = op_fn(state.clone(), args, buf)
|
|
.map(move |result| serialize_op_result(result, state));
|
|
Ok(Op::Async(Box::pin(fut)))
|
|
};
|
|
|
|
Box::new(
|
|
move |state: Rc<RefCell<OpState>>,
|
|
p: OpPayload,
|
|
b: Option<ZeroCopyBuf>|
|
|
-> Op {
|
|
match try_dispatch_op(state.clone(), p, b) {
|
|
Ok(op) => op,
|
|
Err(err) => {
|
|
Op::Sync(serialize_op_result(Err::<(), AnyError>(err), state))
|
|
}
|
|
}
|
|
},
|
|
)
|
|
}
|