Node.js Addons Translation (c + + extension) _node.js

PS: Please upgrade the Node 6.2.1,node Upgrade command NPM install-g N;n stable first. Node.js extension is a dynamic link library written through c/s + +, and is loaded by Node.js function require () function, which is like using a common node.js module. It mainly provides interfaces between node and C + + library.

In this way, if a method or function is implemented through the node extension, it becomes quite complex, involving several modules and interface knowledge:

V8: A JavaScript implemented through the C + + library. V8 provides a mechanism for creating objects, callback functions, and so on. Most of the V8API documents are in the V8.h header file. Dot me V8 online documentation

LIBUV: A C Library of event loops for a platform that implements Node.js worker threads and asynchronous behavior. It also serves as a Cross-platform abstraction library for simply posix-like access to many common tasks of all major operating system systems, such as file system interactions, sockets, timers, and system events. LIBUV also provides an abstract pthreads-like thread that can be used for more complex asynchrony. Node.js-C + + extensions need to go beyond standard event loops. Plug-in authors encourage thinking about how to avoid blocking I/O event loops and accomplishing task-intensive work by LIBUV non-blocking system operations, worker threads, and user-defined threads.

Node.js Built-in Library: The Node.js itself uses a large number of C + + extended api,c/c++ extensions when one of the most important classes Node:objectwrap

node.js Numerous static link libraries such as OpenSSL:Node.js's other libraries under its source directory tree Deps directory. For more information, please see · Node.js ' s own dependencies for additional information. I node.js the official Extension Library sample, which is probably the starting point for you to write a C + + extensions library for Node.js. Only the V8 and OpenSSL classes are often used frequently in node C + + extensions.

Node + C + + expansion first bullet-The latest example Hello World

This example applies to node.js version number V5.0.

Hello.js
Const addon = require ('./build/release/addon ');
Console.log (Addon.hello ()); ' World '
//hello.cc
#include <node.h>
#include <v8.h>
namespace Demo {
using V8:: Functioncallbackinfo;
Using V8::isolate;
Using V8::local;
Using V8::object;
Using V8::string;
Using V8::value;
void method (const functioncallbackinfo<value>& args) {
isolate* isolate = args. Getisolate ();
Args. Getreturnvalue (). Set (String::newfromutf8 (Isolate, "world"));
}
void Init (local<object> exports) {
Node_set_method (exports, "Hello", method);
}
Node_module (addon, init)
}//Namespace demo 
//Binding.gyp
{
"targets": [
{
] target_ Name ': ' Addon ',
' sources ': [' hello.cc ']
}
]

NODE-GYP command

Copy Code code as follows:

Node-gyp Configure Build

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