爲什麼包裝在exports.handler中時，此代碼在Lambda上出錯？

Question

我使用這個casperjs應用的NodeJS：https://github.com/narainsagar/node-casperjs-aws-lambda

我已經得到我的代碼在本地工作，當上傳到LAMBDA，但我需要我的包裏面的代碼exports.handler所以我可以傳遞數據和從來自API網關的功能。 （我已經用其他不使用這個應用程序的函數來做這件事。）當我把我的代碼放到exports.handler中時，它失敗了。我已經測試了將事件數據添加到lambda中的測試事件中，並且我嘗試了對其進行硬編碼。當我的代碼位於exports.handler內時，兩者都失敗。爲什麼exports.handler會破壞這段代碼？

工作代碼W/O exports.handler：

var ua = 'Mozilla/5.0 (iPad; CPU OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1'; 

var casper = require('casper').create({ 
    viewportSize: {width: 768, height: 1024}, 
    userAgent: ua//, 
    //verbose: true, 
    //logLevel: 'debug' 
}); 

exports.handler = function (event, context) { 

    var login = {}; 
    var usrObj = { 
     succ: {}, 
     err: [] 
    }; 
    //exit function 
    var exit = function() { 
     setTimeout(function() { 
      casper.page.close(); 
      casper.exit(); 
      casper.bypass(1); 
     }, 10); 
    }; 
    //success & error message function 
    var message = function(dat) { 
     if (dat === 'credentials') { 
      usrObj['err'].push('Error: Login credentials are missing'); 
     } 
     else if (dat) { 
      usrObj['err'].push(dat); 
     } 

     if (usrObj['err'].length > 0) { 
      console.log('Error not empty...'); 
      console.log(JSON.stringify(usrObj.err)); 
      context.fail(JSON.stringify(usrObj.err)); 
      return exit(); 
     } 
     else if (usrObj['succ']) { 
      console.log('Success not empty...'); 
      console.log(JSON.stringify(usrObj.succ)); 
      context.succeed(JSON.stringify(usrObj.succ)); 
      return exit(); 
     } 
    }; 

    //trim login credentials 
    login.email = event.email; 
    login.pw = event.pw; 

    if (login.email && login.pw) { 

     casper.start('https://vimeo.com/log_in'); 
     casper.waitForSelector('form#login_form', 
      function success() { 
       this.echo(this.getCurrentUrl()); 
       this.sendKeys('form#login_form input[name="email"]', login.email); 
       this.sendKeys('form#login_form input[name="password"]', login.pw); 
       this.click('form#login_form input[type=submit][value="Log in with email"]'); 
      }, 
      function fail() { 
       message('Error with Vimeo [page not loading]') 
      } 
     ); 
     casper.waitForSelector('#page_header>h1>a', 
      function success() { 
       this.echo(this.getCurrentUrl()); 
       usrObj['succ']['uname'] = this.getHTML('span.topnav_user_name'); 
       usrObj['succ']['profile'] = this.getElementAttribute('li.topnav_user_profile>a', 'href'); 
       var test = []; 
       if (!usrObj.succ.uname) {test.push('Username not retrieved')} 
       if (!usrObj.succ.profile) {test.push('Profile link not retrieved')} 
       if (test.length > 0) {message(test.join('<br />'));} 
       //else {message();} 
      }, 
      function fail() { 
       message('Login not successful'); 
      } 
     ); 
     casper.thenOpen('https://vimeo.com/staceydavidgearz', 
      function success() { 
       this.echo('Stacey David Profile: ' + this.getTitle()); 
       this.echo(this.getCurrentUrl()); 
       var finish = function() { 
        usrObj['succ']['foll'] = true; 
        message(); 
       } 
       var foll = this.getElementAttribute('button[data-fatal-attraction="container:profile_page|component:follow"] > svg', 'viewBox'); 
       if (foll === '0 0 10 10') { 
        this.click('button[data-fatal-attraction="container:profile_page|component:follow"]'); 
        setTimeout(function() { 
         foll = this.getElementAttribute('button[data-fatal-attraction="container:profile_page|component:follow"] > svg', 'viewBox'); 
         if (foll === '0 0 10 10') { 
          message('Can\'t follow SD'); 

         } 
         else {finish();} 
        }, 250); 
       } 
       else { 
        finish(); 
       } 
      }, 
      function fail() { 
       message('Not going to Stacey David profile page.'); 
      } 
     ); 

     casper.run(); 
    } 
    else {message('credentials');} 
}; 

LAMBDA響應：

var ua = 'Mozilla/5.0 (iPad; CPU OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1' 
var casper = require('casper').create({ 
    viewportSize: {width: 768, height: 1024}, 
    userAgent: ua 
}); 
var login = {email: 'fakeemail@gmail.com', pw: 'fakepw'} 
var usrObj = { 
    succ: {}, 
    err: [] 
}; 

//exit function 
function exit() { 
    setTimeout(function() { 
     casper.exit(); 
     casper.bypass(1); 
    }, 10); 
} 
//success & error message function 
function message(dat) { 
    if (dat === 'credentials') { 
     console.log('Error: Login credentials are missing'); 
     return exit(); 
    } 
    else if (dat) { 
     console.log(dat); 
     return exit(); 
    } 

    if (usrObj['err'].length > 0) { 
     console.log('Error not empty...'); 
     console.log(usrObj.err); 
     return exit(); 
    } 
    else if (usrObj['succ']) { 
     console.log('Success not empty...'); 
     console.log(JSON.stringify(usrObj.succ)); 
     return exit(); 
    } 

} 

//trim login credentials 
login.email = login.email.trim(); 
login.pw = login.pw.trim(); 

if (login.email && login.pw) { 

    casper.start('https://vimeo.com/log_in'); 
    casper.waitForSelector('form#login_form', 
     function success() { 
      this.echo(this.getCurrentUrl()); 
      this.sendKeys('form#login_form input[name="email"]', login.email); 
      this.sendKeys('form#login_form input[name="password"]', login.pw); 
      this.click('form#login_form input[type=submit][value="Log in with email"]'); 
     }, 
     function fail() { 
      message('Error with Vimeo [page not loading]') 
     } 
    ); 
    casper.waitForSelector('#page_header>h1>a', 
     function success() { 
      this.echo(this.getCurrentUrl()); 
      usrObj['succ']['uname'] = this.getHTML('span.topnav_user_name'); 
      usrObj['succ']['profile'] = this.getElementAttribute('li.topnav_user_profile>a', 'href'); 
      var test = []; 
      if (!usrObj.succ.uname) {test.push('Username not retrieved')} 
      if (!usrObj.succ.profile) {test.push('Profile link not retrieved')} 
      if (test.length > 0) {message(test.join('<br />'));} 
      //else {message();} 
     }, 
     function fail() { 
      message('Login not successful'); 
     } 
    ); 
    casper.thenOpen('https://vimeo.com/staceydavidgearz', 
     function success() { 
      this.echo('Stacey David Profile: ' + this.getTitle()); 
      this.echo(this.getCurrentUrl()); 
      var finish = function() { 
       usrObj['succ']['foll'] = true; 
       message(); 
      } 
      //var foll = this.getHTML('button[data-fatal-attraction="container:profile_page|component:follow"] > span'); 
      var foll = this.getElementAttribute('button[data-fatal-attraction="container:profile_page|component:follow"] > svg', 'viewBox'); 
      if (foll === '0 0 10 10') { 
       this.click('button[data-fatal-attraction="container:profile_page|component:follow"]'); 
       setTimeout(function() { 
        foll = this.getElementAttribute('button[data-fatal-attraction="container:profile_page|component:follow"] > svg', 'viewBox'); 
        if (foll === '0 0 10 10') { 
         message('Can\'t follow SD'); 

        } 
        else {finish();} 
       }, 250); 
      } 
      else { 
       finish(); 
      } 
     }, 
     function fail() { 
      message('Not going to Stacey David profile page.'); 
     } 
    ); 

    casper.run(); 
} 
else {message('credentials');} 

代碼中exports.handler失敗

身體

[] 

日誌：

Calling casperJS: /var/task/node_modules/casperjs/bin/casperjs [ '/var/task/casperjs-script.js' ] { PHANTOMJS_EXECUTABLE: '/var/task/phantomjs' } 
child process exited with code 1 

Answer 1

請確保您還上傳了您的依賴關係「node_modules」與casper組件。 給出的錯誤是因爲lambda執行沒有在require中找到該組件。

Answer 2

請點擊此鏈接：https://github.com/narainsagar/node-casperjs-aws-lambda/issues/6#issuecomment-279177650

嗨，你可以通過你的數據通過卡斯帕ARGS支持刮板腳本：

使runCasper功能index.js文件中像這樣一些變化：

var childArgs = [ 
path.join(__dirname, scriptName), 
***@***.***', 
'--password=12345' 
]; 

，並在您卡斯帕腳本，你可以得到的參數數據，如低於此 ：

var utils = require('utils'); 

utils.dump(casper.cli.get('email')); 
utils.dump(casper.cli.get('password')); 
// OR 
// utils.dump(casper.cli.raw.get('email')); 
// utils.dump(casper.cli.raw.get('password')); 

希望這有助於..

乾杯，

納瑞恩