[英]How to create native module for node.js
I want to create my own native Nodejs module. 我想创建自己的本机Nodejs模块。 I have been following http://nodejs.org/docs/latest/api/addons.html and try to understand how to create native module . 我一直在关注http://nodejs.org/docs/latest/api/addons.html并尝试了解如何创建本机模块。
First created hello.cc 首先创建了hello.cc
#include <node.h>
#include <v8.h>
using namespace v8;
Handle<Value> Method(const Arguments& args) {
HandleScope scope;
return scope.Close(String::New("world"));
}
void init(Handle<Object> exports) {
exports->Set(String::NewSymbol("hello"),
FunctionTemplate::New(Method)->GetFunction());
}
NODE_MODULE(hello, init)
Then created binding.gyp 然后创建binding.gyp
{
"targets": [
{
"target_name": "hello",
"sources": [ "hello.cc" ]
}
]
}
Then I ran these command 然后我运行了这些命令
node-gyp configure
node-gyp build
finally created hello.js 最后创建了hello.js.
var addon = require('./build/Release/hello');
console.log(addon.hello());
At this time I got error like 这时我得到了错误
module.js:355
Module._extensions[extension](this, filename);
and so on. 等等。
I tried to build your example but I don't achieve to complete because of V8 versions. 我试图建立你的例子,但由于V8版本我无法完成。
So I followed the nodejs addon example again. 所以我再次关注nodejs addon示例 。 Today the example is a little different at yours. 今天的例子与你的有点不同。 And all works right. 一切正常。
My environment is the following: 我的环境如下:
I hope this will be useful. 我希望这会有用。
I guess your example comes from following this tutorial, problem is that I get several compiler errors that seems to be due to missing imports on the current release of node
: 我想你的例子来自本教程,问题是我得到了几个编译器错误,这些错误似乎是由于当前版本的node
上缺少导入:
../hello.cc:7:15: error: calling a protected constructor of class 'v8::HandleScope'
HandleScope scope;
^
/Users/admin/.node-gyp/4.2.6/include/node/v8.h:885:13: note: declared protected here
V8_INLINE HandleScope() {}
^
../hello.cc:8:16: error: no member named 'Close' in 'v8::HandleScope'
return scope.Close(String::New("world"));
~~~~~ ^
../hello.cc:8:30: error: no member named 'New' in 'v8::String'
return scope.Close(String::New("world"));
~~~~~~~~^
../hello.cc:13:29: error: cannot initialize a parameter of type 'v8::Isolate *' with an lvalue of type 'Handle<v8::Value> (const v8::internal::Arguments &)'
FunctionTemplate::New(Method)->GetFunction());
^~~~~~
/Users/admin/.node-gyp/4.2.6/include/node/v8.h:4350:16: note: passing argument to parameter 'isolate' here
Isolate* isolate, FunctionCallback callback = 0,
^
../hello.cc:12:23: error: no member named 'NewSymbol' in 'v8::String'
target->Set(String::NewSymbol("hello"),
~~~~~~~~^
In file included from ../hello.cc:1:
In file included from /Users/admin/.node-gyp/4.2.6/include/node/node.h:42:
/Users/admin/.node-gyp/4.2.6/include/node/v8.h:327:9: error: cannot initialize a member subobject of type 'v8::FunctionTemplate *' with an lvalue of type 'const char *'
: val_(that) {}
^ ~~~~
../hello.cc:8:34: note: in instantiation of function template specialization 'v8::Local<v8::FunctionTemplate>::Local<const char>' requested here
return scope.Close(String::New("world"));
Node version is 节点版本是
macbookproloreto:native admin$ node -v
v4.2.6
while node-gyp
is 而node-gyp
是
macbookproloreto:native admin$ node-gyp -v
v3.3.1
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