从Node.js调用C ++库(节点插件/node-ffi) [英] Call C++ library from Node.js (Node addons / node-ffi)
问题描述
我正在尝试将一个外部C ++库(我可以访问.so文件以及头文件)集成到我的Node.js应用程序中.
I'm trying to integrate an external C++ library (I have access to the .so file as well as the header files) into my Node.js application.
经过大量研究，我的选择减少到:
After a lot of research my options are reduced to:
-
编写节点插件
使用 node-ffi
根据node-ffi的gitHub的定义，我无法确定它是否可以直接在C ++库上运行:
From node-ffi's gitHub's definition I can't tell if it will or will not work directly on C++ libraries:
node-ffi是一个Node.js插件，用于使用纯JavaScript加载和调用动态库.它可以用于创建与本机库的绑定，而无需编写任何C ++代码.
node-ffi is a Node.js addon for loading and calling dynamic libraries using pure JavaScript. It can be used to create bindings to native libraries without writing any C++ code.
所以我的问题是:
- 选项1)是否暗示以某种方式重写外部C ++库?
- node-ffi是否可以直接调用C ++库而无需编写任何类型的C包装器?
在C/C ++方面，我不是专家，因此，如果我错过了一些基本的知识以使您能够回答，请告诉我，以便我改善问题.
I'm no expert when it comes to C/C++ so if I missed something basic for you to be able to answer please let me know so I can improve my question.
推荐答案
node-ffi似乎主要用于C程序.我在上周经历了这一点，并发现节点插件的运气要好得多.您要做的是在库中的C ++代码和node.js之间编写垫片.在我的情况下，我需要为安全协议编码和解码数据包，因此我制作了包含数据包的节点缓冲区，并编写了将数据从缓冲区中取出的C ++代码，然后将数据发送到编码并解码的C代码中.解码的数据包.
node-ffi seems to be primarily for C programs. I went through this in the last week, and found much better luck with node addons. What you have to do is write a shim between the C++ code in the library and node.js. In my case, I needed to encode and decode packets for a security protocol, so I made node buffers that contained the packets, and wrote C++ code that got the data out of the buffers, then send the data to my C code that encoded and decoded packets.
此页面: http://luismreis.github.io/node -bindings-guide/docs/returning.html 提供了一些很棒的示例，说明了如何在C ++中将数据放入和取出node.js缓冲区.
This page: http://luismreis.github.io/node-bindings-guide/docs/returning.html has some great examples of how to get data in and out of node.js buffers in C++.
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