mirror of
https://github.com/denoland/deno.git
synced 2024-10-31 09:14:20 -04:00
619 lines
17 KiB
Rust
619 lines
17 KiB
Rust
// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
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use serde::ser;
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use serde::ser::Serialize;
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use std::cell::RefCell;
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use crate::error::{Error, Result};
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use crate::keys::v8_struct_key;
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use crate::magic::transl8::MAGIC_FIELD;
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use crate::magic::transl8::{opaque_deref_mut, opaque_recv, MagicType, ToV8};
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use crate::{
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magic, ByteString, DetachedBuffer, StringOrBuffer, U16String, ZeroCopyBuf,
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};
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type JsValue<'s> = v8::Local<'s, v8::Value>;
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type JsResult<'s> = Result<JsValue<'s>>;
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type ScopePtr<'a, 'b, 'c> = &'c RefCell<&'b mut v8::HandleScope<'a>>;
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pub fn to_v8<'a, T>(scope: &mut v8::HandleScope<'a>, input: T) -> JsResult<'a>
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where
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T: Serialize,
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{
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let scopeptr = RefCell::new(scope);
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let serializer = Serializer::new(&scopeptr);
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input.serialize(serializer)
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}
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/// Wraps other serializers into an enum tagged variant form.
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/// Uses {"Variant": ...payload...} for compatibility with serde-json.
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pub struct VariantSerializer<'a, 'b, 'c, S> {
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inner: S,
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scope: ScopePtr<'a, 'b, 'c>,
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variant: &'static str,
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}
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impl<'a, 'b, 'c, S> VariantSerializer<'a, 'b, 'c, S> {
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pub fn new(
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scope: ScopePtr<'a, 'b, 'c>,
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variant: &'static str,
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inner: S,
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) -> Self {
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Self {
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inner,
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scope,
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variant,
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}
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}
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fn end(self, inner: impl FnOnce(S) -> JsResult<'a>) -> JsResult<'a> {
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let value = inner(self.inner)?;
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let scope = &mut *self.scope.borrow_mut();
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let null = v8::null(scope).into();
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let key = v8_struct_key(scope, self.variant).into();
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let obj =
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v8::Object::with_prototype_and_properties(scope, null, &[key], &[value]);
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Ok(obj.into())
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}
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}
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impl<'a, 'b, 'c, S> ser::SerializeTupleVariant
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for VariantSerializer<'a, 'b, 'c, S>
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where
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S: ser::SerializeTupleStruct<Ok = JsValue<'a>, Error = Error>,
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{
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type Ok = JsValue<'a>;
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type Error = Error;
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fn serialize_field<T: ?Sized + Serialize>(
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&mut self,
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value: &T,
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) -> Result<()> {
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self.inner.serialize_field(value)
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}
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fn end(self) -> JsResult<'a> {
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self.end(S::end)
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}
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}
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impl<'a, 'b, 'c, S> ser::SerializeStructVariant
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for VariantSerializer<'a, 'b, 'c, S>
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where
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S: ser::SerializeStruct<Ok = JsValue<'a>, Error = Error>,
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{
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type Ok = JsValue<'a>;
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type Error = Error;
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fn serialize_field<T: ?Sized + Serialize>(
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&mut self,
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key: &'static str,
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value: &T,
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) -> Result<()> {
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self.inner.serialize_field(key, value)
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}
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fn end(self) -> JsResult<'a> {
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self.end(S::end)
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}
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}
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pub struct ArraySerializer<'a, 'b, 'c> {
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pending: Vec<JsValue<'a>>,
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scope: ScopePtr<'a, 'b, 'c>,
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}
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impl<'a, 'b, 'c> ArraySerializer<'a, 'b, 'c> {
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pub fn new(scope: ScopePtr<'a, 'b, 'c>, len: Option<usize>) -> Self {
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let pending = match len {
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Some(len) => Vec::with_capacity(len),
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None => vec![],
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};
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Self { pending, scope }
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}
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}
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impl<'a, 'b, 'c> ser::SerializeSeq for ArraySerializer<'a, 'b, 'c> {
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type Ok = JsValue<'a>;
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type Error = Error;
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fn serialize_element<T: ?Sized + Serialize>(
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&mut self,
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value: &T,
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) -> Result<()> {
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let x = value.serialize(Serializer::new(self.scope))?;
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self.pending.push(x);
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Ok(())
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}
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fn end(self) -> JsResult<'a> {
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let elements = self.pending.iter().as_slice();
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let scope = &mut *self.scope.borrow_mut();
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let arr = v8::Array::new_with_elements(scope, elements);
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Ok(arr.into())
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}
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}
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impl<'a, 'b, 'c> ser::SerializeTuple for ArraySerializer<'a, 'b, 'c> {
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type Ok = JsValue<'a>;
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type Error = Error;
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fn serialize_element<T: ?Sized + Serialize>(
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&mut self,
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value: &T,
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) -> Result<()> {
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ser::SerializeSeq::serialize_element(self, value)
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}
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fn end(self) -> JsResult<'a> {
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ser::SerializeSeq::end(self)
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}
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}
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impl<'a, 'b, 'c> ser::SerializeTupleStruct for ArraySerializer<'a, 'b, 'c> {
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type Ok = JsValue<'a>;
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type Error = Error;
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fn serialize_field<T: ?Sized + Serialize>(
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&mut self,
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value: &T,
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) -> Result<()> {
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ser::SerializeTuple::serialize_element(self, value)
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}
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fn end(self) -> JsResult<'a> {
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ser::SerializeTuple::end(self)
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}
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}
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pub struct ObjectSerializer<'a, 'b, 'c> {
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scope: ScopePtr<'a, 'b, 'c>,
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keys: Vec<v8::Local<'a, v8::Name>>,
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values: Vec<JsValue<'a>>,
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}
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impl<'a, 'b, 'c> ObjectSerializer<'a, 'b, 'c> {
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pub fn new(scope: ScopePtr<'a, 'b, 'c>, len: usize) -> Self {
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let keys = Vec::with_capacity(len);
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let values = Vec::with_capacity(len);
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Self {
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scope,
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keys,
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values,
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}
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}
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}
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impl<'a, 'b, 'c> ser::SerializeStruct for ObjectSerializer<'a, 'b, 'c> {
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type Ok = JsValue<'a>;
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type Error = Error;
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fn serialize_field<T: ?Sized + Serialize>(
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&mut self,
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key: &'static str,
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value: &T,
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) -> Result<()> {
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let value = value.serialize(Serializer::new(self.scope))?;
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let scope = &mut *self.scope.borrow_mut();
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let key = v8_struct_key(scope, key).into();
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self.keys.push(key);
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self.values.push(value);
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Ok(())
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}
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fn end(self) -> JsResult<'a> {
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let scope = &mut *self.scope.borrow_mut();
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let null = v8::null(scope);
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let obj = v8::Object::with_prototype_and_properties(
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scope,
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null.into(),
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&self.keys[..],
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&self.values[..],
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);
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Ok(obj.into())
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}
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}
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pub struct MagicalSerializer<'a, 'b, 'c, T> {
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scope: ScopePtr<'a, 'b, 'c>,
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opaque: u64,
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p1: std::marker::PhantomData<T>,
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}
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impl<'a, 'b, 'c, T> MagicalSerializer<'a, 'b, 'c, T> {
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pub fn new(scope: ScopePtr<'a, 'b, 'c>) -> MagicalSerializer<'a, 'b, 'c, T> {
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Self {
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scope,
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opaque: 0,
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p1: std::marker::PhantomData::<T> {},
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}
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}
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}
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impl<'a, 'b, 'c, T: MagicType + ToV8> ser::SerializeStruct
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for MagicalSerializer<'a, 'b, 'c, T>
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{
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type Ok = JsValue<'a>;
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type Error = Error;
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fn serialize_field<U: ?Sized + Serialize>(
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&mut self,
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key: &'static str,
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value: &U,
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) -> Result<()> {
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assert_eq!(key, MAGIC_FIELD);
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let ptr: &U = value;
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// SAFETY: MagicalSerializer only ever receives single field u64s,
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// type-safety is ensured by MAGIC_NAME checks in `serialize_struct()`
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self.opaque = unsafe { opaque_recv(ptr) };
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Ok(())
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}
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fn end(self) -> JsResult<'a> {
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// SAFETY: transerialization assumptions imply `T` is still alive.
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let x: &mut T = unsafe { opaque_deref_mut(self.opaque) };
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let scope = &mut *self.scope.borrow_mut();
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x.to_v8(scope)
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}
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}
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// Dispatches between magic and regular struct serializers
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pub enum StructSerializers<'a, 'b, 'c> {
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Magic(MagicalSerializer<'a, 'b, 'c, magic::Value<'a>>),
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ZeroCopyBuf(MagicalSerializer<'a, 'b, 'c, ZeroCopyBuf>),
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MagicDetached(MagicalSerializer<'a, 'b, 'c, DetachedBuffer>),
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MagicByteString(MagicalSerializer<'a, 'b, 'c, ByteString>),
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MagicU16String(MagicalSerializer<'a, 'b, 'c, U16String>),
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MagicStringOrBuffer(MagicalSerializer<'a, 'b, 'c, StringOrBuffer>),
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Regular(ObjectSerializer<'a, 'b, 'c>),
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}
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impl<'a, 'b, 'c> ser::SerializeStruct for StructSerializers<'a, 'b, 'c> {
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type Ok = JsValue<'a>;
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type Error = Error;
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fn serialize_field<T: ?Sized + Serialize>(
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&mut self,
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key: &'static str,
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value: &T,
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) -> Result<()> {
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match self {
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StructSerializers::Magic(s) => s.serialize_field(key, value),
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StructSerializers::ZeroCopyBuf(s) => s.serialize_field(key, value),
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StructSerializers::MagicDetached(s) => s.serialize_field(key, value),
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StructSerializers::MagicByteString(s) => s.serialize_field(key, value),
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StructSerializers::MagicU16String(s) => s.serialize_field(key, value),
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StructSerializers::MagicStringOrBuffer(s) => {
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s.serialize_field(key, value)
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}
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StructSerializers::Regular(s) => s.serialize_field(key, value),
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}
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}
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fn end(self) -> JsResult<'a> {
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match self {
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StructSerializers::Magic(s) => s.end(),
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StructSerializers::ZeroCopyBuf(s) => s.end(),
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StructSerializers::MagicDetached(s) => s.end(),
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StructSerializers::MagicByteString(s) => s.end(),
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StructSerializers::MagicU16String(s) => s.end(),
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StructSerializers::MagicStringOrBuffer(s) => s.end(),
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StructSerializers::Regular(s) => s.end(),
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}
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}
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}
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// Serializes to JS Objects, NOT JS Maps ...
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pub struct MapSerializer<'a, 'b, 'c> {
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scope: ScopePtr<'a, 'b, 'c>,
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keys: Vec<v8::Local<'a, v8::Name>>,
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values: Vec<JsValue<'a>>,
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}
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impl<'a, 'b, 'c> MapSerializer<'a, 'b, 'c> {
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pub fn new(scope: ScopePtr<'a, 'b, 'c>, len: Option<usize>) -> Self {
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let keys = Vec::with_capacity(len.unwrap_or_default());
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let values = Vec::with_capacity(len.unwrap_or_default());
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Self {
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scope,
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keys,
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values,
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}
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}
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}
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impl<'a, 'b, 'c> ser::SerializeMap for MapSerializer<'a, 'b, 'c> {
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type Ok = JsValue<'a>;
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type Error = Error;
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fn serialize_key<T: ?Sized + Serialize>(&mut self, key: &T) -> Result<()> {
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let key = key.serialize(Serializer::new(self.scope))?;
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self.keys.push(key.try_into().map_err(|_| {
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Error::Message("Serialized Maps expect String keys".into())
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})?);
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Ok(())
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}
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fn serialize_value<T: ?Sized + Serialize>(
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&mut self,
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value: &T,
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) -> Result<()> {
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let v8_value = value.serialize(Serializer::new(self.scope))?;
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self.values.push(v8_value);
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Ok(())
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}
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fn end(self) -> JsResult<'a> {
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debug_assert!(self.keys.len() == self.values.len());
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let scope = &mut *self.scope.borrow_mut();
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let null = v8::null(scope).into();
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let obj = v8::Object::with_prototype_and_properties(
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scope,
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null,
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&self.keys[..],
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&self.values[..],
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);
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Ok(obj.into())
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}
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}
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pub struct Serializer<'a, 'b, 'c> {
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scope: ScopePtr<'a, 'b, 'c>,
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}
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impl<'a, 'b, 'c> Serializer<'a, 'b, 'c> {
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pub fn new(scope: ScopePtr<'a, 'b, 'c>) -> Self {
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Serializer { scope }
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}
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}
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macro_rules! forward_to {
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($($name:ident($ty:ty, $to:ident, $lt:lifetime);)*) => {
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$(fn $name(self, v: $ty) -> JsResult<$lt> {
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self.$to(v as _)
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})*
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};
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}
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const MAX_SAFE_INTEGER: i64 = (1 << 53) - 1;
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const MIN_SAFE_INTEGER: i64 = -MAX_SAFE_INTEGER;
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impl<'a, 'b, 'c> ser::Serializer for Serializer<'a, 'b, 'c> {
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type Ok = v8::Local<'a, v8::Value>;
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type Error = Error;
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type SerializeSeq = ArraySerializer<'a, 'b, 'c>;
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type SerializeTuple = ArraySerializer<'a, 'b, 'c>;
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type SerializeTupleStruct = ArraySerializer<'a, 'b, 'c>;
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type SerializeTupleVariant =
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VariantSerializer<'a, 'b, 'c, ArraySerializer<'a, 'b, 'c>>;
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type SerializeMap = MapSerializer<'a, 'b, 'c>;
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type SerializeStruct = StructSerializers<'a, 'b, 'c>;
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type SerializeStructVariant =
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VariantSerializer<'a, 'b, 'c, StructSerializers<'a, 'b, 'c>>;
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forward_to! {
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serialize_i8(i8, serialize_i32, 'a);
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serialize_i16(i16, serialize_i32, 'a);
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serialize_u8(u8, serialize_u32, 'a);
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serialize_u16(u16, serialize_u32, 'a);
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serialize_f32(f32, serialize_f64, 'a);
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}
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fn serialize_i32(self, v: i32) -> JsResult<'a> {
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Ok(v8::Integer::new(&mut self.scope.borrow_mut(), v).into())
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}
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fn serialize_u32(self, v: u32) -> JsResult<'a> {
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Ok(v8::Integer::new_from_unsigned(&mut self.scope.borrow_mut(), v).into())
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}
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fn serialize_i64(self, v: i64) -> JsResult<'a> {
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let s = &mut self.scope.borrow_mut();
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// If i64 can fit in max safe integer bounds then serialize as v8::Number
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// otherwise serialize as v8::BigInt
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if (MIN_SAFE_INTEGER..=MAX_SAFE_INTEGER).contains(&v) {
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Ok(v8::Number::new(s, v as _).into())
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} else {
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Ok(v8::BigInt::new_from_i64(s, v).into())
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}
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}
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fn serialize_u64(self, v: u64) -> JsResult<'a> {
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let s = &mut self.scope.borrow_mut();
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// If u64 can fit in max safe integer bounds then serialize as v8::Number
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// otherwise serialize as v8::BigInt
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if v <= (MAX_SAFE_INTEGER as u64) {
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Ok(v8::Number::new(s, v as _).into())
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} else {
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Ok(v8::BigInt::new_from_u64(s, v).into())
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}
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}
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fn serialize_f64(self, v: f64) -> JsResult<'a> {
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Ok(v8::Number::new(&mut self.scope.borrow_mut(), v).into())
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}
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fn serialize_bool(self, v: bool) -> JsResult<'a> {
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Ok(v8::Boolean::new(&mut self.scope.borrow_mut(), v).into())
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}
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fn serialize_char(self, v: char) -> JsResult<'a> {
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self.serialize_str(&v.to_string())
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}
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fn serialize_str(self, v: &str) -> JsResult<'a> {
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Ok(
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v8::String::new(&mut self.scope.borrow_mut(), v)
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.unwrap()
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.into(),
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)
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}
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fn serialize_bytes(self, v: &[u8]) -> JsResult<'a> {
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Ok(slice_to_uint8array(&mut self.scope.borrow_mut(), v).into())
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}
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fn serialize_none(self) -> JsResult<'a> {
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Ok(v8::null(&mut self.scope.borrow_mut()).into())
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}
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fn serialize_some<T: ?Sized + Serialize>(self, value: &T) -> JsResult<'a> {
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value.serialize(self)
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}
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fn serialize_unit(self) -> JsResult<'a> {
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Ok(v8::null(&mut self.scope.borrow_mut()).into())
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}
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fn serialize_unit_struct(self, _name: &'static str) -> JsResult<'a> {
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Ok(v8::null(&mut self.scope.borrow_mut()).into())
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}
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/// For compatibility with serde-json, serialises unit variants as "Variant" strings.
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fn serialize_unit_variant(
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self,
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_name: &'static str,
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|
_variant_index: u32,
|
|
variant: &'static str,
|
|
) -> JsResult<'a> {
|
|
Ok(v8_struct_key(&mut self.scope.borrow_mut(), variant).into())
|
|
}
|
|
|
|
fn serialize_newtype_struct<T: ?Sized + Serialize>(
|
|
self,
|
|
_name: &'static str,
|
|
value: &T,
|
|
) -> JsResult<'a> {
|
|
value.serialize(self)
|
|
}
|
|
|
|
fn serialize_newtype_variant<T: ?Sized + Serialize>(
|
|
self,
|
|
_name: &'static str,
|
|
_variant_index: u32,
|
|
variant: &'static str,
|
|
value: &T,
|
|
) -> JsResult<'a> {
|
|
let scope = self.scope;
|
|
let x = self.serialize_newtype_struct(variant, value)?;
|
|
VariantSerializer::new(scope, variant, x).end(Ok)
|
|
}
|
|
|
|
/// Serialises any Rust iterable into a JS Array
|
|
fn serialize_seq(self, len: Option<usize>) -> Result<Self::SerializeSeq> {
|
|
Ok(ArraySerializer::new(self.scope, len))
|
|
}
|
|
|
|
fn serialize_tuple(self, len: usize) -> Result<Self::SerializeTuple> {
|
|
self.serialize_seq(Some(len))
|
|
}
|
|
|
|
fn serialize_tuple_struct(
|
|
self,
|
|
_name: &'static str,
|
|
len: usize,
|
|
) -> Result<Self::SerializeTupleStruct> {
|
|
self.serialize_tuple(len)
|
|
}
|
|
|
|
fn serialize_tuple_variant(
|
|
self,
|
|
_name: &'static str,
|
|
_variant_index: u32,
|
|
variant: &'static str,
|
|
len: usize,
|
|
) -> Result<Self::SerializeTupleVariant> {
|
|
Ok(VariantSerializer::new(
|
|
self.scope,
|
|
variant,
|
|
self.serialize_tuple_struct(variant, len)?,
|
|
))
|
|
}
|
|
|
|
fn serialize_map(self, len: Option<usize>) -> Result<Self::SerializeMap> {
|
|
// Serializes a rust Map (e.g: BTreeMap, HashMap) to a v8 Object
|
|
// TODO: consider allowing serializing to v8 Maps (e.g: via a magic type)
|
|
// since they're lighter and better suited for K/V data
|
|
// and maybe restrict keys (e.g: strings and numbers)
|
|
Ok(MapSerializer::new(self.scope, len))
|
|
}
|
|
|
|
/// Serialises Rust typed structs into plain JS objects.
|
|
fn serialize_struct(
|
|
self,
|
|
name: &'static str,
|
|
len: usize,
|
|
) -> Result<Self::SerializeStruct> {
|
|
match name {
|
|
ByteString::MAGIC_NAME => {
|
|
let m = MagicalSerializer::<ByteString>::new(self.scope);
|
|
Ok(StructSerializers::MagicByteString(m))
|
|
}
|
|
U16String::MAGIC_NAME => {
|
|
let m = MagicalSerializer::<U16String>::new(self.scope);
|
|
Ok(StructSerializers::MagicU16String(m))
|
|
}
|
|
ZeroCopyBuf::MAGIC_NAME => {
|
|
let m = MagicalSerializer::<ZeroCopyBuf>::new(self.scope);
|
|
Ok(StructSerializers::ZeroCopyBuf(m))
|
|
}
|
|
DetachedBuffer::MAGIC_NAME => {
|
|
let m = MagicalSerializer::<DetachedBuffer>::new(self.scope);
|
|
Ok(StructSerializers::MagicDetached(m))
|
|
}
|
|
StringOrBuffer::MAGIC_NAME => {
|
|
let m = MagicalSerializer::<StringOrBuffer>::new(self.scope);
|
|
Ok(StructSerializers::MagicStringOrBuffer(m))
|
|
}
|
|
magic::Value::MAGIC_NAME => {
|
|
let m = MagicalSerializer::<magic::Value<'a>>::new(self.scope);
|
|
Ok(StructSerializers::Magic(m))
|
|
}
|
|
_ => {
|
|
// Regular structs
|
|
let o = ObjectSerializer::new(self.scope, len);
|
|
Ok(StructSerializers::Regular(o))
|
|
}
|
|
}
|
|
}
|
|
|
|
fn serialize_struct_variant(
|
|
self,
|
|
_name: &'static str,
|
|
_variant_index: u32,
|
|
variant: &'static str,
|
|
len: usize,
|
|
) -> Result<Self::SerializeStructVariant> {
|
|
let scope = self.scope;
|
|
let x = self.serialize_struct(variant, len)?;
|
|
Ok(VariantSerializer::new(scope, variant, x))
|
|
}
|
|
}
|
|
|
|
pub fn slice_to_uint8array<'a>(
|
|
scope: &mut v8::HandleScope<'a>,
|
|
buf: &[u8],
|
|
) -> v8::Local<'a, v8::Uint8Array> {
|
|
let buffer = if buf.is_empty() {
|
|
v8::ArrayBuffer::new(scope, 0)
|
|
} else {
|
|
let store: v8::UniqueRef<_> =
|
|
v8::ArrayBuffer::new_backing_store(scope, buf.len());
|
|
// SAFETY: raw memory copy into the v8 ArrayBuffer allocated above
|
|
unsafe {
|
|
std::ptr::copy_nonoverlapping(
|
|
buf.as_ptr(),
|
|
store.data().unwrap().as_ptr() as *mut u8,
|
|
buf.len(),
|
|
)
|
|
}
|
|
v8::ArrayBuffer::with_backing_store(scope, &store.make_shared())
|
|
};
|
|
v8::Uint8Array::new(scope, buffer, 0, buf.len())
|
|
.expect("Failed to create UintArray8")
|
|
}
|