node.js调用c++组件.md

#node.js调用c++组件

安装环境

windows

安装node.js

http://nodejs.cn/

下载安装即可

安装node-gyp

https://github.com/nodejs/node-gyp

You can install with npm:

$ npm install -g node-gyp

You will also need to install:

• On Unix:

  • python (v2.7 recommended, v3.x.x is not supported)
  • make
  • A proper C/C++ compiler toolchain, like GCC

• On Mac OS X:

  • python (v2.7 recommended, v3.x.x is not supported) (already installed on Mac OS X)
  • Xcode
    • You also need to install the Command Line Tools via Xcode. You can find this under the menu Xcode -> Preferences -> Downloads
    • This step will install gcc and the related toolchain containing make

• On Windows:

  • Option 1: Install all the required tools and configurations using Microsoft's windows-build-tools using npm install --global --production windows-build-tools from an elevated PowerShell or CMD.exe (run as Administrator).

  • Option 2: Install tools and configuration manually:

    • Visual C++ Build Environment:
      • Option 1: Install Visual C++ Build Tools using the Default Install option.
      • Option 2: Install Visual Studio 2015 (or modify an existing installation) and select Common Tools for Visual C++ during setup. This also works with the free Community and Express for Desktop editions.

  • Install Python 2.7 (v3.x.x is not supported), and run npm config set python python2.7 (or see below for further instructions on specifying the proper Python version and path.)

  • Launch cmd, npm config set msvs_version 2015

模块绑定（.gyp）

{
  "targets": [
    {
      "target_name": "test",
      "sources": [ "hello.cc" ]
    }
  ]
}

.CC文件

// add.cc
#include <node.h>

namespace demo {

using v8::Exception;
using v8::FunctionCallbackInfo;
using v8::Isolate;
using v8::Local;
using v8::Number;
using v8::Object;
using v8::String;
using v8::Value;

void add(const FunctionCallbackInfo<Value>& args) {
	Isolate* isolate = args.GetIsolate();

	// Check the number of arguments passed.
	if (args.Length() < 2) {
		// Throw an Error that is passed back to JavaScript
		isolate->ThrowException(Exception::TypeError(
		String::NewFromUtf8(isolate, "Wrong number of arguments")));
		return;
	}
	// Check the argument types
	if (!args[0]->IsNumber() || !args[1]->IsNumber()) {
		isolate->ThrowException(Exception::TypeError(
		String::NewFromUtf8(isolate, "Wrong arguments")));
		return;
	}

	// Perform the operation
	double value = args[0]->NumberValue() + args[1]->NumberValue();
	Local<Number> num = Number::New(isolate, value);

	// Set the return value (using the passed in
	// FunctionCallbackInfo<Value>&)
	args.GetReturnValue().Set(num);
}

void myInit(Local<Object> exports) {
	NODE_SET_METHOD(exports, "add", add);
}

NODE_MODULE(test, myInit)

}

.js文件

var test = require('./build/Release/test');

console.log(test.hello()); 
console.log(test.myHello());