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// Copyright Joyent, Inc. and other Node contributors. |
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// |
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// Permission is hereby granted, free of charge, to any person obtaining a |
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// copy of this software and associated documentation files (the |
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// "Software"), to deal in the Software without restriction, including |
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// without limitation the rights to use, copy, modify, merge, publish, |
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// distribute, sublicense, and/or sell copies of the Software, and to permit |
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// persons to whom the Software is furnished to do so, subject to the |
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// following conditions: |
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// |
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// The above copyright notice and this permission notice shall be included |
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// in all copies or substantial portions of the Software. |
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// |
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
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// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN |
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// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, |
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// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR |
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// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE |
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// USE OR OTHER DEALINGS IN THE SOFTWARE. |
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#include "async_wrap-inl.h" |
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#include "env-inl.h" |
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#include "handle_wrap.h" |
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#include "node.h" |
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#include "node_external_reference.h" |
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#include "string_bytes.h" |
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namespace node { |
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using v8::Context; |
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using v8::DontDelete; |
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using v8::DontEnum; |
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using v8::FunctionCallbackInfo; |
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using v8::FunctionTemplate; |
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using v8::HandleScope; |
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using v8::Integer; |
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using v8::Local; |
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using v8::MaybeLocal; |
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using v8::Object; |
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using v8::PropertyAttribute; |
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using v8::ReadOnly; |
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using v8::Signature; |
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using v8::String; |
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using v8::Value; |
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namespace { |
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class FSEventWrap: public HandleWrap { |
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public: |
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static void Initialize(Local<Object> target, |
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Local<Value> unused, |
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Local<Context> context, |
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void* priv); |
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static void RegisterExternalReferences(ExternalReferenceRegistry* registry); |
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static void New(const FunctionCallbackInfo<Value>& args); |
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static void Start(const FunctionCallbackInfo<Value>& args); |
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static void GetInitialized(const FunctionCallbackInfo<Value>& args); |
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SET_NO_MEMORY_INFO() |
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SET_MEMORY_INFO_NAME(FSEventWrap) |
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SET_SELF_SIZE(FSEventWrap) |
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private: |
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static const encoding kDefaultEncoding = UTF8; |
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FSEventWrap(Environment* env, Local<Object> object); |
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~FSEventWrap() override = default; |
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static void OnEvent(uv_fs_event_t* handle, const char* filename, int events, |
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int status); |
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uv_fs_event_t handle_; |
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enum encoding encoding_ = kDefaultEncoding; |
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}; |
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FSEventWrap::FSEventWrap(Environment* env, Local<Object> object) |
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: HandleWrap(env, |
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object, |
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reinterpret_cast<uv_handle_t*>(&handle_), |
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AsyncWrap::PROVIDER_FSEVENTWRAP) { |
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MarkAsUninitialized(); |
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} |
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void FSEventWrap::GetInitialized(const FunctionCallbackInfo<Value>& args) { |
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FSEventWrap* wrap = Unwrap<FSEventWrap>(args.This()); |
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✗✓ |
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CHECK_NOT_NULL(wrap); |
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✓✓ |
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args.GetReturnValue().Set(!wrap->IsHandleClosing()); |
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} |
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void FSEventWrap::Initialize(Local<Object> target, |
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Local<Value> unused, |
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Local<Context> context, |
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void* priv) { |
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Environment* env = Environment::GetCurrent(context); |
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Local<FunctionTemplate> t = env->NewFunctionTemplate(New); |
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t->InstanceTemplate()->SetInternalFieldCount( |
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FSEventWrap::kInternalFieldCount); |
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t->Inherit(HandleWrap::GetConstructorTemplate(env)); |
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env->SetProtoMethod(t, "start", Start); |
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Local<FunctionTemplate> get_initialized_templ = |
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FunctionTemplate::New(env->isolate(), |
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GetInitialized, |
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Local<Value>(), |
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Signature::New(env->isolate(), t)); |
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t->PrototypeTemplate()->SetAccessorProperty( |
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FIXED_ONE_BYTE_STRING(env->isolate(), "initialized"), |
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get_initialized_templ, |
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Local<FunctionTemplate>(), |
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static_cast<PropertyAttribute>(ReadOnly | DontDelete | DontEnum)); |
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env->SetConstructorFunction(target, "FSEvent", t); |
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} |
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void FSEventWrap::RegisterExternalReferences( |
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ExternalReferenceRegistry* registry) { |
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registry->Register(New); |
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registry->Register(Start); |
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registry->Register(GetInitialized); |
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} |
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void FSEventWrap::New(const FunctionCallbackInfo<Value>& args) { |
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✗✓ |
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CHECK(args.IsConstructCall()); |
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Environment* env = Environment::GetCurrent(args); |
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new FSEventWrap(env, args.This()); |
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} |
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// wrap.start(filename, persistent, recursive, encoding) |
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void FSEventWrap::Start(const FunctionCallbackInfo<Value>& args) { |
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Environment* env = Environment::GetCurrent(args); |
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FSEventWrap* wrap = Unwrap<FSEventWrap>(args.This()); |
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✗✓ |
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CHECK_NOT_NULL(wrap); |
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CHECK(wrap->IsHandleClosing()); // Check that Start() has not been called. |
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const int argc = args.Length(); |
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✗✓ |
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CHECK_GE(argc, 4); |
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BufferValue path(env->isolate(), args[0]); |
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✗✓ |
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CHECK_NOT_NULL(*path); |
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✓✗ |
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unsigned int flags = 0; |
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✗✓ |
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if (args[2]->IsTrue()) |
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flags |= UV_FS_EVENT_RECURSIVE; |
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wrap->encoding_ = ParseEncoding(env->isolate(), args[3], kDefaultEncoding); |
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int err = uv_fs_event_init(wrap->env()->event_loop(), &wrap->handle_); |
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✗✓ |
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if (err != 0) { |
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return args.GetReturnValue().Set(err); |
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} |
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err = uv_fs_event_start(&wrap->handle_, OnEvent, *path, flags); |
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wrap->MarkAsInitialized(); |
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✓✓ |
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if (err != 0) { |
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FSEventWrap::Close(args); |
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return args.GetReturnValue().Set(err); |
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} |
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// Check for persistent argument |
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✓✓ |
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if (!args[1]->IsTrue()) { |
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uv_unref(reinterpret_cast<uv_handle_t*>(&wrap->handle_)); |
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} |
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args.GetReturnValue().Set(err); |
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} |
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void FSEventWrap::OnEvent(uv_fs_event_t* handle, const char* filename, |
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int events, int status) { |
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FSEventWrap* wrap = static_cast<FSEventWrap*>(handle->data); |
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Environment* env = wrap->env(); |
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HandleScope handle_scope(env->isolate()); |
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Context::Scope context_scope(env->context()); |
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✗✓ |
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CHECK_EQ(wrap->persistent().IsEmpty(), false); |
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// We're in a bind here. libuv can set both UV_RENAME and UV_CHANGE but |
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// the Node API only lets us pass a single event to JS land. |
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// |
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// The obvious solution is to run the callback twice, once for each event. |
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// However, since the second event is not allowed to fire if the handle is |
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// closed after the first event, and since there is no good way to detect |
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// closed handles, that option is out. |
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// |
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// For now, ignore the UV_CHANGE event if UV_RENAME is also set. Make the |
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// assumption that a rename implicitly means an attribute change. Not too |
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// unreasonable, right? Still, we should revisit this before v1.0. |
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Local<String> event_string; |
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✗✓ |
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if (status) { |
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event_string = String::Empty(env->isolate()); |
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✓✓ |
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} else if (events & UV_RENAME) { |
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event_string = env->rename_string(); |
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✓✗ |
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} else if (events & UV_CHANGE) { |
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event_string = env->change_string(); |
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} else { |
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CHECK(0 && "bad fs events flag"); |
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} |
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Local<Value> argv[] = { |
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Integer::New(env->isolate(), status), |
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event_string, |
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Null(env->isolate()) |
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}; |
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✓✗ |
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if (filename != nullptr) { |
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Local<Value> error; |
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MaybeLocal<Value> fn = StringBytes::Encode(env->isolate(), |
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filename, |
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wrap->encoding_, |
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&error); |
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if (fn.IsEmpty()) { |
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argv[0] = Integer::New(env->isolate(), UV_EINVAL); |
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argv[2] = StringBytes::Encode(env->isolate(), |
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filename, |
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strlen(filename), |
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BUFFER, |
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&error).ToLocalChecked(); |
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} else { |
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argv[2] = fn.ToLocalChecked(); |
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} |
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} |
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wrap->MakeCallback(env->onchange_string(), arraysize(argv), argv); |
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} |
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} // anonymous namespace |
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} // namespace node |
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NODE_MODULE_CONTEXT_AWARE_INTERNAL(fs_event_wrap, node::FSEventWrap::Initialize) |
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NODE_MODULE_EXTERNAL_REFERENCE(fs_event_wrap, |
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node::FSEventWrap::RegisterExternalReferences) |