C/C++实现nodejs扩展接口 node-addon-api

1. 软件准备

• windows7或者更高版本

• python3或者更高版本

  C:\Users\macrored\Desktop>python --version
  Python 3.7.7

• node或者更高版本

  C:\Users\macrored\Desktop>node -v
  v12.16.1

• vs_BuildTools/Visual Studio 15或者更高版本

  

2. 实例

新建一个文件夹

• package.json

  {
    "name": "test-cpp-module",
    "version": "0.1.0",
    "private": true,
    "gypfile": true,
    "dependencies": {
      "node-addon-api": "^2.0.0"
    }
  }

• binding.gyp

  {
    "targets": [
      {
        "target_name": "democpp",
        "sources": [
          "democpp.cc"
        ],
        "include_dirs": [
          "<!@(node -p \"require('node-addon-api').include\")"
        ],
        "libraries": [ 
  
        ],
        "dependencies": [
          "<!(node -p \"require('node-addon-api').gyp\")"
        ],
        "cflags!": ["-fno-exceptions"],
        "cflags_cc!": ["-fno-exceptions"],
        "defines": ["NAPI_CPP_EXCEPTIONS"],
        "xcode_settings": {
          "GCC_ENABLE_CPP_EXCEPTIONS": "YES"
        }
      }
    ]
  }

• democpp.cc

  #include <napi.h>
  
  using namespace Napi;
  
  String Hello(const CallbackInfo& info) {
    return String::New(info.Env(), "world");
  }
  
  Napi::Object  Init(Env env, Object exports) {
    exports.Set("hello", Function::New(env, Hello));
    return exports;
  }
  NODE_API_MODULE(addon, Init)

在当前文件夹开启命令行，保持网络畅通，运行npm install

E:\WorkSpace\Code\node-addon-cplus>npm install

> test-cpp-module@0.1.0 install E:\WorkSpace\Code\node-addon-cplus
> node-gyp rebuild


E:\WorkSpace\Code\node-addon-cplus>if not defined npm_config_node_gyp (node "D:Program Files\nodejs\node_modules\npm\node_modules\npm-lifecycle\node-gyp-bin\\.
.\..\node_modules\node-gyp\bin\node-gyp.js" rebuild )  else (node "D:\Program Fi
les\nodejs\node_modules\npm\node_modules\node-gyp\bin\node-gyp.js" rebuild )
Building the projects in this solution one at a time. To enable parallel build,
please add the "/m" switch.
  nothing.c
  win_delay_load_hook.cc
  nothing.vcxproj -> E:\WorkSpace\Code\node-addon-cplus\build\Release\\nothing.
  lib
  democpp.cc
  win_delay_load_hook.cc
e:\workspace\code\node-addon-cplus\node_modules\node-addon-api\napi-inl.h(2141)
: warning C4530: C++ exception handler used, but unwind semantics are not enabl
ed. Specify /EHsc (compiling source file ..\democpp.cc) [E:\WorkSpace\Code\node
-addon-cplus\build\democpp.vcxproj]
     Creating library E:\WorkSpace\Code\node-addon-cplus\build\Release\democpp.
  lib and object E:\WorkSpace\Code\node-addon-cplus\build\Release\democpp.exp
  democpp.vcxproj -> E:\WorkSpace\Code\node-addon-cplus\build\Release\\democpp.
  node
npm notice created a lockfile as package-lock.json. You should commit this file.

added 1 package from 50 contributors and audited 1 package in 15.303s
found 0 vulnerabilities


E:\WorkSpace\Code\node-addon-cplus>

顺利编译，此时在得到输出文件.\build\Release\democpp.node，下一步，在node中调用hello()

E:\WorkSpace\Code\node-addon-cplus>node
Welcome to Node.js v12.16.1.
Type ".help" for more information.
> testapp=require('./build/Release/democpp.node')
{ hello: [Function] }
> testapp.hello()
'world'
>

提供上述实例源文件链接

参考文章

[1] 简单上手nodejs调用c++(c++和js的混合编程)

[2] node-addon-examples

原文：https://www.cnblogs.com/macrored/p/12543462.html