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#include "node_internals.h"
#include "node_buffer.h"
#include "node_errors.h"
#include "util-inl.h"
#include "base_object-inl.h"
namespace node {
using v8::Array;
using v8::ArrayBuffer;
using v8::Context;
using v8::Function;
using v8::FunctionCallbackInfo;
using v8::FunctionTemplate;
using v8::Integer;
using v8::Isolate;
using v8::Just;
using v8::Local;
using v8::Maybe;
using v8::MaybeLocal;
using v8::Nothing;
using v8::Object;
using v8::SharedArrayBuffer;
using v8::String;
using v8::Value;
using v8::ValueDeserializer;
using v8::ValueSerializer;
namespace {
class SerializerContext : public BaseObject,
public ValueSerializer::Delegate {
public:
SerializerContext(Environment* env,
Local<Object> wrap);
~SerializerContext() override = default;
void ThrowDataCloneError(Local<String> message) override;
Maybe<bool> WriteHostObject(Isolate* isolate, Local<Object> object) override;
Maybe<uint32_t> GetSharedArrayBufferId(
Isolate* isolate, Local<SharedArrayBuffer> shared_array_buffer) override;
static void SetTreatArrayBufferViewsAsHostObjects(
const FunctionCallbackInfo<Value>& args);
static void New(const FunctionCallbackInfo<Value>& args);
static void WriteHeader(const FunctionCallbackInfo<Value>& args);
static void WriteValue(const FunctionCallbackInfo<Value>& args);
static void ReleaseBuffer(const FunctionCallbackInfo<Value>& args);
static void TransferArrayBuffer(const FunctionCallbackInfo<Value>& args);
static void WriteUint32(const FunctionCallbackInfo<Value>& args);
static void WriteUint64(const FunctionCallbackInfo<Value>& args);
static void WriteDouble(const FunctionCallbackInfo<Value>& args);
static void WriteRawBytes(const FunctionCallbackInfo<Value>& args);
SET_NO_MEMORY_INFO()
SET_MEMORY_INFO_NAME(SerializerContext)
SET_SELF_SIZE(SerializerContext)
private:
ValueSerializer serializer_;
};
class DeserializerContext : public BaseObject,
public ValueDeserializer::Delegate {
public:
DeserializerContext(Environment* env,
Local<Object> wrap,
Local<Value> buffer);
~DeserializerContext() override = default;
MaybeLocal<Object> ReadHostObject(Isolate* isolate) override;
static void New(const FunctionCallbackInfo<Value>& args);
static void ReadHeader(const FunctionCallbackInfo<Value>& args);
static void ReadValue(const FunctionCallbackInfo<Value>& args);
static void TransferArrayBuffer(const FunctionCallbackInfo<Value>& args);
static void GetWireFormatVersion(const FunctionCallbackInfo<Value>& args);
static void ReadUint32(const FunctionCallbackInfo<Value>& args);
static void ReadUint64(const FunctionCallbackInfo<Value>& args);
static void ReadDouble(const FunctionCallbackInfo<Value>& args);
static void ReadRawBytes(const FunctionCallbackInfo<Value>& args);
SET_NO_MEMORY_INFO()
SET_MEMORY_INFO_NAME(DeserializerContext)
SET_SELF_SIZE(DeserializerContext)
private:
const uint8_t* data_;
const size_t length_;
ValueDeserializer deserializer_;
};
SerializerContext::SerializerContext(Environment* env, Local<Object> wrap)
: BaseObject(env, wrap),
serializer_(env->isolate(), this) {
MakeWeak();
}
void SerializerContext::ThrowDataCloneError(Local<String> message) {
Local<Value> args[1] = { message };
Local<Value> get_data_clone_error =
object()->Get(env()->context(),
env()->get_data_clone_error_string())
.ToLocalChecked();
CHECK(get_data_clone_error->IsFunction());
MaybeLocal<Value> error =
get_data_clone_error.As<Function>()->Call(env()->context(),
object(),
arraysize(args),
args);
if (error.IsEmpty()) return;
env()->isolate()->ThrowException(error.ToLocalChecked());
}
Maybe<uint32_t> SerializerContext::GetSharedArrayBufferId(
Isolate* isolate, Local<SharedArrayBuffer> shared_array_buffer) {
Local<Value> args[1] = { shared_array_buffer };
Local<Value> get_shared_array_buffer_id =
object()->Get(env()->context(),
env()->get_shared_array_buffer_id_string())
.ToLocalChecked();
if (!get_shared_array_buffer_id->IsFunction()) {
return ValueSerializer::Delegate::GetSharedArrayBufferId(
isolate, shared_array_buffer);
}
MaybeLocal<Value> id =
get_shared_array_buffer_id.As<Function>()->Call(env()->context(),
object(),
arraysize(args),
args);
if (id.IsEmpty()) return Nothing<uint32_t>();
return id.ToLocalChecked()->Uint32Value(env()->context());
}
Maybe<bool> SerializerContext::WriteHostObject(Isolate* isolate,
Local<Object> input) {
MaybeLocal<Value> ret;
Local<Value> args[1] = { input };
Local<Value> write_host_object =
object()->Get(env()->context(),
env()->write_host_object_string()).ToLocalChecked();
if (!write_host_object->IsFunction()) {
return ValueSerializer::Delegate::WriteHostObject(isolate, input);
}
ret = write_host_object.As<Function>()->Call(env()->context(),
object(),
arraysize(args),
args);
if (ret.IsEmpty())
return Nothing<bool>();
return Just(true);
}
void SerializerContext::New(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
new SerializerContext(env, args.This());
}
void SerializerContext::WriteHeader(const FunctionCallbackInfo<Value>& args) {
SerializerContext* ctx;
ASSIGN_OR_RETURN_UNWRAP(&ctx, args.Holder());
ctx->serializer_.WriteHeader();
}
void SerializerContext::WriteValue(const FunctionCallbackInfo<Value>& args) {
SerializerContext* ctx;
ASSIGN_OR_RETURN_UNWRAP(&ctx, args.Holder());
Maybe<bool> ret =
ctx->serializer_.WriteValue(ctx->env()->context(), args[0]);
if (ret.IsJust()) args.GetReturnValue().Set(ret.FromJust());
}
void SerializerContext::SetTreatArrayBufferViewsAsHostObjects(
const FunctionCallbackInfo<Value>& args) {
SerializerContext* ctx;
ASSIGN_OR_RETURN_UNWRAP(&ctx, args.Holder());
bool value = args[0]->BooleanValue(ctx->env()->isolate());
ctx->serializer_.SetTreatArrayBufferViewsAsHostObjects(value);
}
void SerializerContext::ReleaseBuffer(const FunctionCallbackInfo<Value>& args) {
SerializerContext* ctx;
ASSIGN_OR_RETURN_UNWRAP(&ctx, args.Holder());
// Note: Both ValueSerializer and this Buffer::New() variant use malloc()
// as the underlying allocator.
std::pair<uint8_t*, size_t> ret = ctx->serializer_.Release();
auto buf = Buffer::New(ctx->env(),
reinterpret_cast<char*>(ret.first),
ret.second,
true /* uses_malloc */);
if (!buf.IsEmpty()) {
args.GetReturnValue().Set(buf.ToLocalChecked());
}
}
void SerializerContext::TransferArrayBuffer(
const FunctionCallbackInfo<Value>& args) {
SerializerContext* ctx;
ASSIGN_OR_RETURN_UNWRAP(&ctx, args.Holder());
Maybe<uint32_t> id = args[0]->Uint32Value(ctx->env()->context());
if (id.IsNothing()) return;
if (!args[1]->IsArrayBuffer())
return node::THROW_ERR_INVALID_ARG_TYPE(
ctx->env(), "arrayBuffer must be an ArrayBuffer");
Local<ArrayBuffer> ab = args[1].As<ArrayBuffer>();
ctx->serializer_.TransferArrayBuffer(id.FromJust(), ab);
return;
}
void SerializerContext::WriteUint32(const FunctionCallbackInfo<Value>& args) {
SerializerContext* ctx;
ASSIGN_OR_RETURN_UNWRAP(&ctx, args.Holder());
Maybe<uint32_t> value = args[0]->Uint32Value(ctx->env()->context());
if (value.IsNothing()) return;
ctx->serializer_.WriteUint32(value.FromJust());
}
void SerializerContext::WriteUint64(const FunctionCallbackInfo<Value>& args) {
SerializerContext* ctx;
ASSIGN_OR_RETURN_UNWRAP(&ctx, args.Holder());
Maybe<uint32_t> arg0 = args[0]->Uint32Value(ctx->env()->context());
Maybe<uint32_t> arg1 = args[1]->Uint32Value(ctx->env()->context());
if (arg0.IsNothing() || arg1.IsNothing())
return;
uint64_t hi = arg0.FromJust();
uint64_t lo = arg1.FromJust();
ctx->serializer_.WriteUint64((hi << 32) | lo);
}
void SerializerContext::WriteDouble(const FunctionCallbackInfo<Value>& args) {
SerializerContext* ctx;
ASSIGN_OR_RETURN_UNWRAP(&ctx, args.Holder());
Maybe<double> value = args[0]->NumberValue(ctx->env()->context());
if (value.IsNothing()) return;
ctx->serializer_.WriteDouble(value.FromJust());
}
void SerializerContext::WriteRawBytes(const FunctionCallbackInfo<Value>& args) {
SerializerContext* ctx;
ASSIGN_OR_RETURN_UNWRAP(&ctx, args.Holder());
if (!args[0]->IsArrayBufferView()) {
return node::THROW_ERR_INVALID_ARG_TYPE(
ctx->env(), "source must be a TypedArray or a DataView");
}
ArrayBufferViewContents<char> bytes(args[0]);
ctx->serializer_.WriteRawBytes(bytes.data(), bytes.length());
}
DeserializerContext::DeserializerContext(Environment* env,
Local<Object> wrap,
Local<Value> buffer)
: BaseObject(env, wrap),
data_(reinterpret_cast<const uint8_t*>(Buffer::Data(buffer))),
length_(Buffer::Length(buffer)),
deserializer_(env->isolate(), data_, length_, this) {
object()->Set(env->context(), env->buffer_string(), buffer).Check();
MakeWeak();
}
MaybeLocal<Object> DeserializerContext::ReadHostObject(Isolate* isolate) {
Local<Value> read_host_object =
object()->Get(env()->context(),
env()->read_host_object_string()).ToLocalChecked();
if (!read_host_object->IsFunction()) {
return ValueDeserializer::Delegate::ReadHostObject(isolate);
}
Isolate::AllowJavascriptExecutionScope allow_js(isolate);
MaybeLocal<Value> ret =
read_host_object.As<Function>()->Call(env()->context(),
object(),
0,
nullptr);
if (ret.IsEmpty())
return MaybeLocal<Object>();
Local<Value> return_value = ret.ToLocalChecked();
if (!return_value->IsObject()) {
env()->ThrowTypeError("readHostObject must return an object");
return MaybeLocal<Object>();
}
return return_value.As<Object>();
}
void DeserializerContext::New(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
if (!args[0]->IsArrayBufferView()) {
return node::THROW_ERR_INVALID_ARG_TYPE(
env, "buffer must be a TypedArray or a DataView");
}
new DeserializerContext(env, args.This(), args[0]);
}
void DeserializerContext::ReadHeader(const FunctionCallbackInfo<Value>& args) {
DeserializerContext* ctx;
ASSIGN_OR_RETURN_UNWRAP(&ctx, args.Holder());
Maybe<bool> ret = ctx->deserializer_.ReadHeader(ctx->env()->context());
if (ret.IsJust()) args.GetReturnValue().Set(ret.FromJust());
}
void DeserializerContext::ReadValue(const FunctionCallbackInfo<Value>& args) {
DeserializerContext* ctx;
ASSIGN_OR_RETURN_UNWRAP(&ctx, args.Holder());
MaybeLocal<Value> ret = ctx->deserializer_.ReadValue(ctx->env()->context());
if (!ret.IsEmpty()) args.GetReturnValue().Set(ret.ToLocalChecked());
}
void DeserializerContext::TransferArrayBuffer(
const FunctionCallbackInfo<Value>& args) {
DeserializerContext* ctx;
ASSIGN_OR_RETURN_UNWRAP(&ctx, args.Holder());
Maybe<uint32_t> id = args[0]->Uint32Value(ctx->env()->context());
if (id.IsNothing()) return;
if (args[1]->IsArrayBuffer()) {
Local<ArrayBuffer> ab = args[1].As<ArrayBuffer>();
ctx->deserializer_.TransferArrayBuffer(id.FromJust(), ab);
return;
}
if (args[1]->IsSharedArrayBuffer()) {
Local<SharedArrayBuffer> sab = args[1].As<SharedArrayBuffer>();
ctx->deserializer_.TransferSharedArrayBuffer(id.FromJust(), sab);
return;
}
return node::THROW_ERR_INVALID_ARG_TYPE(
ctx->env(), "arrayBuffer must be an ArrayBuffer or SharedArrayBuffer");
}
void DeserializerContext::GetWireFormatVersion(
const FunctionCallbackInfo<Value>& args) {
DeserializerContext* ctx;
ASSIGN_OR_RETURN_UNWRAP(&ctx, args.Holder());
args.GetReturnValue().Set(ctx->deserializer_.GetWireFormatVersion());
}
void DeserializerContext::ReadUint32(const FunctionCallbackInfo<Value>& args) {
DeserializerContext* ctx;
ASSIGN_OR_RETURN_UNWRAP(&ctx, args.Holder());
uint32_t value;
bool ok = ctx->deserializer_.ReadUint32(&value);
if (!ok) return ctx->env()->ThrowError("ReadUint32() failed");
return args.GetReturnValue().Set(value);
}
void DeserializerContext::ReadUint64(const FunctionCallbackInfo<Value>& args) {
DeserializerContext* ctx;
ASSIGN_OR_RETURN_UNWRAP(&ctx, args.Holder());
uint64_t value;
bool ok = ctx->deserializer_.ReadUint64(&value);
if (!ok) return ctx->env()->ThrowError("ReadUint64() failed");
uint32_t hi = static_cast<uint32_t>(value >> 32);
uint32_t lo = static_cast<uint32_t>(value);
Isolate* isolate = ctx->env()->isolate();
Local<Value> ret[] = {
Integer::NewFromUnsigned(isolate, hi),
Integer::NewFromUnsigned(isolate, lo)
};
return args.GetReturnValue().Set(Array::New(isolate, ret, arraysize(ret)));
}
void DeserializerContext::ReadDouble(const FunctionCallbackInfo<Value>& args) {
DeserializerContext* ctx;
ASSIGN_OR_RETURN_UNWRAP(&ctx, args.Holder());
double value;
bool ok = ctx->deserializer_.ReadDouble(&value);
if (!ok) return ctx->env()->ThrowError("ReadDouble() failed");
return args.GetReturnValue().Set(value);
}
void DeserializerContext::ReadRawBytes(
const FunctionCallbackInfo<Value>& args) {
DeserializerContext* ctx;
ASSIGN_OR_RETURN_UNWRAP(&ctx, args.Holder());
Maybe<int64_t> length_arg = args[0]->IntegerValue(ctx->env()->context());
if (length_arg.IsNothing()) return;
size_t length = length_arg.FromJust();
const void* data;
bool ok = ctx->deserializer_.ReadRawBytes(length, &data);
if (!ok) return ctx->env()->ThrowError("ReadRawBytes() failed");
const uint8_t* position = reinterpret_cast<const uint8_t*>(data);
CHECK_GE(position, ctx->data_);
CHECK_LE(position + length, ctx->data_ + ctx->length_);
const uint32_t offset = position - ctx->data_;
CHECK_EQ(ctx->data_ + offset, position);
args.GetReturnValue().Set(offset);
}
void Initialize(Local<Object> target,
Local<Value> unused,
Local<Context> context,
void* priv) {
Environment* env = Environment::GetCurrent(context);
Local<FunctionTemplate> ser =
env->NewFunctionTemplate(SerializerContext::New);
ser->InstanceTemplate()->SetInternalFieldCount(
SerializerContext::kInternalFieldCount);
env->SetProtoMethod(ser, "writeHeader", SerializerContext::WriteHeader);
env->SetProtoMethod(ser, "writeValue", SerializerContext::WriteValue);
env->SetProtoMethod(ser, "releaseBuffer", SerializerContext::ReleaseBuffer);
env->SetProtoMethod(ser,
"transferArrayBuffer",
SerializerContext::TransferArrayBuffer);
env->SetProtoMethod(ser, "writeUint32", SerializerContext::WriteUint32);
env->SetProtoMethod(ser, "writeUint64", SerializerContext::WriteUint64);
env->SetProtoMethod(ser, "writeDouble", SerializerContext::WriteDouble);
env->SetProtoMethod(ser, "writeRawBytes", SerializerContext::WriteRawBytes);
env->SetProtoMethod(ser,
"_setTreatArrayBufferViewsAsHostObjects",
SerializerContext::SetTreatArrayBufferViewsAsHostObjects);
Local<String> serializerString =
FIXED_ONE_BYTE_STRING(env->isolate(), "Serializer");
ser->SetClassName(serializerString);
target->Set(env->context(),
serializerString,
ser->GetFunction(env->context()).ToLocalChecked()).Check();
Local<FunctionTemplate> des =
env->NewFunctionTemplate(DeserializerContext::New);
des->InstanceTemplate()->SetInternalFieldCount(
DeserializerContext::kInternalFieldCount);
env->SetProtoMethod(des, "readHeader", DeserializerContext::ReadHeader);
env->SetProtoMethod(des, "readValue", DeserializerContext::ReadValue);
env->SetProtoMethod(des,
"getWireFormatVersion",
DeserializerContext::GetWireFormatVersion);
env->SetProtoMethod(des,
"transferArrayBuffer",
DeserializerContext::TransferArrayBuffer);
env->SetProtoMethod(des, "readUint32", DeserializerContext::ReadUint32);
env->SetProtoMethod(des, "readUint64", DeserializerContext::ReadUint64);
env->SetProtoMethod(des, "readDouble", DeserializerContext::ReadDouble);
env->SetProtoMethod(des, "_readRawBytes", DeserializerContext::ReadRawBytes);
Local<String> deserializerString =
FIXED_ONE_BYTE_STRING(env->isolate(), "Deserializer");
des->SetClassName(deserializerString);
target->Set(env->context(),
deserializerString,
des->GetFunction(env->context()).ToLocalChecked()).Check();
}
} // anonymous namespace
} // namespace node
NODE_MODULE_CONTEXT_AWARE_INTERNAL(serdes, node::Initialize)
|