nodejs addon c++ 连接其他库文件 node-gyp

1. 使用静态库

1, test.js

?

1 2 3 4 5

var addon = require('./hello');   var mpsse = addon.hello();   console.log(mpsse.x);

2, hello.cpp

?

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34

#include <node.h> #include <v8.h>   #include "NFCInfo.h" //外部静态库的头文件   using namespace v8; <br>//静态类用作全局变量，可以返回js对象。 class JSNFC{ public:     static void init(Handle<Object> target){         nfcObj = Object::New();         nfcObj->Set(String::NewSymbol("x"), Integer::New(10) );     }           static Handle<Object> nfcObj; };   Handle<Object> JSNFC::nfcObj;   Handle<Value> Method(const Arguments& args) {   HandleScope scope;<br><br>　　//测试的外部静态类方法 　　NFCInfo nfc("NFC"); 　　nfc.writeSmartposter("zhibin","232323");<br>   　return scope.Close( JSNFC::nfcObj  ); }   void init(Handle<Object> target) {         target->Set(String::NewSymbol("hello"),                 FunctionTemplate::New(Method)->GetFunction());     　　JSNFC::init(target); } NODE_MODULE(hello, init)

　　

3，binding.gyp

?

1 2 3 4 5 6 7 8 9 10 11

{   "targets": [     {       "target_name": "hello",       "sources": [ "hello.cpp" ],     'include_dirs': [                        './include'     ]     }   ] }

　　

?

1	include_dirs是外部库的头文件<br><br>4，mybuild.sh<br><br>

?

1 2	node-gyp configure build gcc -fexceptions -O2 -o hello.node ./build/Release/obj.target/hello/hello.o ./libmynfclib.a /usr/local/lib/libnfc.a  -shared -fPIC

　在当前目录生成了 hello.node 可执行动态库。

执行node-gyp test.js.

---

或者只要在binding.gyp加入一句话：

?

1 2 3 4 5 6 7 8 9 10 11 12

{   "targets": [     {       "target_name": "hello",       "sources": [ "hello.cpp" ],     'include_dirs': [                        './include'     ],     "libraries":["/home/user/workspace/nodejs/libpanda.a", "/usr/local/lib/libnfc.a"]     }   ] }

　　

---

 

 

2.使用动态库，避免两个静态库有redefine。

1）binding.gyp

?

1 2 3 4 5 6 7 8 9 10 11 12 13

{   "targets": [     {       "target_name": "hello",       "sources": [ "hello.cpp" ],     'include_dirs': [                        './include'     ],     "libraries":["/home/user/workspace/nodejs/libpanda.a", "/usr/local/lib/libnfc.so","/usr/local/lib/libmpsse.so"],     "cflags!":["-fexceptions"]     }   ] }

2) hello.cpp

#include <node.h>
#include <v8.h>

#include "NFCInfo.h"
#include "AccelerMeter.h"

#define WIRING_DEFINE_CONSTANT(NAME, VALUE) (target)->Set( \
        v8::String::NewSymbol(NAME), \
        v8::Integer::New(VALUE), \
        static_cast<v8::PropertyAttribute>(v8::None) \
);

using namespace v8;

class JSNFC {
public:
    static void init(Handle<Object> target) {
        //Here can store target object.
    }
    
    static Handle<Object> readADXL() {
        
        AccelerMeter am("AccelerMeter");
        am.readADXL();
        Handle<Object> mpsseObj = Object::New();
        mpsseObj->Set(String::NewSymbol("x"), Integer::New(am.x));
        mpsseObj->Set(String::NewSymbol("y"), Integer::New(am.y));
        mpsseObj->Set(String::NewSymbol("z"), Integer::New(am.z));
        
        return mpsseObj;
    }    

};

Handle<Value> sendSmartposter(const Arguments& args) {
    HandleScope scope;
    
    NFCInfo nfc("NFC");    
    nfc.writeSmartposter("zhibin", "232323");
    bool ret = nfc.send();
    return scope.Close(Integer::New((ret?1:0)));
}

Handle<Value> readADXL(const Arguments& args) {
    HandleScope scope;    
    ;
    return scope.Close(JSNFC::readADXL());
}

void init(Handle<Object> target) {
    target->Set(String::NewSymbol("smartposter"), FunctionTemplate::New(sendSmartposter)->GetFunction());    
    target->Set(String::NewSymbol("readADXL"), FunctionTemplate::New(readADXL)->GetFunction());
    
    JSNFC::init(target);
}
NODE_MODULE(hello, init)

3) test.js

//var addon = require('./hello');
var addon = require('./build/Release/hello');



var mpsse = addon.readADXL();

console.log(mpsse.x); 
console.log(mpsse.y); 
console.log(mpsse.z); 

console.log(addon.smartposter());

4) 编译运行：

 node-gyp build

node test.js