Question

我尝试通过做与wiki相同的事情来调用SpookyJS中的外部函数：https://github.com/WaterfallEngineering/SpookyJS/wiki/Introduction

但是当我尝试以下代码时，我有这个错误：

ReferenceError：找不到变量：test

try {
    var Spooky = require('spooky');
} catch (e) {
    var Spooky = require('../lib/spooky');
}

var urls = ["http://www.google.fr",
            "http://www.yahoo.com"
          ];

exports.clicker = function(req, res)
{
  console.log("FIRST: " + visitUrl + " \n\n\n END FIRST");


  var visitUrl = function(urlIndex, nbClicked)
  {
      console.log("HELLO");
  };

  var spooky = new Spooky(
    {
      child: {
        // transport: 'http'
      },
      casper: {
        logLevel: 'debug',
        verbose: true
      }
    }, function (err)
    {
      if (err)
      {
        e = new Error('Failed to initialize SpookyJS');
        e.details = err;
        throw e;
      }

      spooky.start(urls[0]);

      console.log("SECOND: " + visitUrl + " \n\n\n END SECOND");

      spooky.then([{
        test: visitUrl
      }, function(){

        console.log("THIRD: " + test + " \n\n\n END THIRD");
      }]);

      spooky.run();
    });

    // Uncomment this block to see all of the things Casper has to say.
    // There are a lot.
    // He has opinions.
    spooky.on('console', function (line) {
      console.log(line);
    });

    spooky.on('hello', function (greeting) {
      console.log(greeting);
    });

    spooky.on('log', function (log) {
      if (log.space === 'remote') {
        console.log(log.message.replace(/ \- .*/, ''));
      }
    });
}

以下两个日志有效：

console.log("FIRST: " + visitUrl + " \n\n\n END FIRST");
console.log("SECOND: " + visitUrl + " \n\n\n END SECOND");

但是第三个负责错误信息：

console.log("THIRD: " + test + " \n\n\n END THIRD");

有什么建议吗？

Answer 1

我想对你的帖子发表评论，而不是给出一个很好的答案，但我没有它的声誉，嗯。

您无法在灰化中传递函数。如果你要做

var x = 'HELLO'
spooky.then([{
    XinCasper : x
}, function(){
    //do something with XinCasper
}])

那会有用。如果要传递对象或数组，请在casper范围内使用JSON.stringify并重建。

如果你想从casper范围访问怪异的函数，请使用事件发射器，如下所示（主要参见最后一行）：

try {
var Spooky = require('spooky');
} catch (e) {
    var Spooky = require('../lib/spooky');
}

var urls = ["http://www.google.fr",
        "http://www.yahoo.com"
      ];

exports.clicker = function(req, res)
{
console.log("FIRST: " + visitUrl + " \n\n\n END FIRST");


var visitUrl = function(urlIndex, nbClicked)
{
  console.log("HELLO");
};

var spooky = new Spooky(
{
  child: {
    // transport: 'http'
  },
  casper: {
    logLevel: 'debug',
    verbose: true
  }
}, function (err)
{
  if (err)
  {
    e = new Error('Failed to initialize SpookyJS');
    e.details = err;
    throw e;
  }

  spooky.start(urls[0]);

  console.log("SECOND: " + visitUrl + " \n\n\n END SECOND");

  spooky.then(function(){
      //casper scope
      var y = 'something'
      this.emit('third', y)
  });

  spooky.run();
});

spooky.on('third', function(y){
    console.log('Hey, I can output ' + y + ' here.') 
}

Answer 2

显然，您使用的是变量test

console.log("THIRD: " + test + " \n\n\n END THIRD");

没有先声明。

var test;

可能用req替换它。：）

Answer 3

最后，我成功地使用PhantomJS-node而不是SpookyJS来做我需要的。

ReferenceError：无法使用SpookyJS查找变量

3 个答案: