如何从SDK插件数据文件夹加载DLL？

Question

我们使用Web IDE创建插件.我的test.dll位于数据文件夹中.如何通过js-ctypes加载它？

像"c:\ test.dll"这样的绝对路径没有问题,但我不能用这个路径来分发它.

var lib = ctypes.open("c:\\test.dll"); 
// works but how i get path to addon inner data directory?

Answer 1

我给你的阻力最小的方式......还有其他方法,比如从已安装的XPI中手动解压缩DLL,但这样做太宽泛,容易出错且复杂.

1. 您需要"unpack": true在package.json中定义,以便在安装时解压缩XPI.

2. 您需要使用self.data.url()各种其他工具来确定DLL文件的实际路径.在URI成为文件URI之前,URI可能会在"resource:"和/或"chrome:"URI中被多次包装.所以这也需要打开.

   const {Cc, Cu, Ci} = require("chrome");
   Cu.import("resource://gre/modules/Services.jsm");
   const ResProtocolHandler = Services.io.getProtocolHandler("resource").
                              QueryInterface(Ci.nsIResProtocolHandler);
   const ChromeRegistry = Cc["@mozilla.org/chrome/chrome-registry;1"].
                          getService(Ci.nsIChromeRegistry);
   
   function resolveToFile(uri) {
     switch (uri.scheme) {
       case "chrome":
         return resolveToFile(ChromeRegistry.convertChromeURL(uri));
       case "resource":
         return resolveToFile(Services.io.newURI(ResProtocolHandler.resolveURI(uri), null, null));
       case "file":
         return uri.QueryInterface(Ci.nsIFileURL).file;
       default:
         throw new Error("Cannot resolve");
     }
   }
   
   const {data} = require("self");
   let dll = data.url("test.dll");
   dll = resolveToFile(Services.io.newURI(dll, null, null));
   console.log(dll.path); // dll.path is the full, platform-dependent path for the file.