一、为什么需要使用DLL
需要使用系统 API 操作或扩展应用程序;
需要调用第三方的接口API,特别是与硬件设备进行通信,而这些接口 API 基本上都是通过 C++ 动态链接库(DLL)实现的;
需要调用C++实现的一些复杂算法等。
二、node-ffi 是什么
node-ffi:Node.js Foreign Function Interface
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. It also simplifies the augmentation of node.js with C code as it takes care of handling the translation of types across JavaScript and C, which can add reams of boilerplate code to your otherwise simple C. See the example/factorial for an example of this use case.
WARNING: node-ffi
assumes you know what you're doing. You can pretty easily create situations where you will segfault the interpreter and unless you've got C debugger skills, you probably won't know what's going on.
上面是 node-ffi 的介绍,英语不好,就不翻译了。
三、electron 使用 node-ffi
使用上一篇文章里的项目,在 package.json 的 dependencies 节点上加上node-ffi 依赖:
"dependencies": { "electron": "^1.6.11", "ffi": "2.2.0" }
然后安装缺失的 npm 包(参考之前的
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