Question

首先让我说我是node.js和Promises的新手。

我正在使用Bluebird来宣传node.js中的一些代码。

原始代码是用C ++编写的（项目名称：sapnwrfc）。我有一个使用回调的工作示例，如下所示：

con.Open(conParams, function(err) {                                             
  // some error handling                                                                         
  var func = con.Lookup('ZHELLO_RFC');                                          
  console.log(func.Invoke.toString());                                          
  func.Invoke({ }, function(err, result) {                                      
            console.log(result);                                                
  });                                                                           
});

上面的代码运行得很好，toString()输出给了我function Invoke() { [native code] }。我使用下面的蓝鸟宣传它：

var Promise = require('bluebird');
var sapnwrfc = Promise.promisifyAll(require('sapnwrfc'));

// setup

con.OpenAsync(conParams).then(function(err) {
  // some error handling
  var hello = con.Lookup('ZHELLO_RFC');
  console.log(hello.Invoke.toString());
  return Promise.promisify(hello.Invoke)({ })
}).then(function(err, result) {
  // some error handling
  console.log(result);
});

当我运行上面的代码片段时，我在输出中得到了这个：

Unhandled rejection TypeError: Illegal invocation
    at tryCatcher (/home/phil/bc_workspace/MyProject/MyCode/node_modules/bluebird/js/release/util.js:16:23)
    at ret (eval at makeNodePromisifiedEval (/home/phil/bc_workspace/MyProject/MyCode/node_modules/bluebird/js/release/promisify.js:184:12), <anonymous>:14:23)
    at /home/phil/bc_workspace/MyProject/MyCode/sapOnly.js:27:44
    at tryCatcher (/home/phil/bc_workspace/MyProject/MyCode/node_modules/bluebird/js/release/util.js:16:23)
    at Promise._settlePromiseFromHandler (/home/phil/bc_workspace/MyProject/MyCode/node_modules/bluebird/js/release/promise.js:512:31)
    at Promise._settlePromise (/home/phil/bc_workspace/MyProject/MyCode/node_modules/bluebird/js/release/promise.js:569:18)
    at Promise._settlePromise0 (/home/phil/bc_workspace/MyProject/MyCode/node_modules/bluebird/js/release/promise.js:614:10)
    at Promise._settlePromises (/home/phil/bc_workspace/MyProject/MyCode/node_modules/bluebird/js/release/promise.js:693:18)
    at Promise._fulfill (/home/phil/bc_workspace/MyProject/MyCode/node_modules/bluebird/js/release/promise.js:638:18)
    at /home/phil/bc_workspace/MyProject/MyCode/node_modules/bluebird/js/release/nodeback.js:42:21

我错过了什么，或者是否支持本机代码？

是否可以在node.js中使用本机代码进行函数化？

0 个答案: