为什么在包装在exports.handler中时,Lambda上的代码出错?

时间:2017-02-09 20:58:42

标签: javascript node.js amazon-web-services aws-lambda aws-api-gateway

我正在使用这个casperjs nodejs app:read the documentation

我已经让我的代码在本地工作并且在上传到Lambda时,但是我需要将我的代码包装在exports.handler中,这样我就可以从API网关向函数传递数据。 (我已经使用其他未使用此应用程序的函数执行此操作。)当我将我的代码放在exports.handler中时,它会失败。我已经测试过将事件数据添加到lambda中的测试事件中,并且我已尝试对其进行硬编码。当我的代码在exports.handler中时,两者都失败了。为什么exports.handler会破坏这段代码?

没有exports.handler的工作代码:

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');}
};

exports.handler中的代码失败:

[]

Lambda回复:

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

日志:

Encounter.findOne({ order: 'random()' }).then((encounter) => {
    // single random encounter
});

2 个答案:

答案 0 :(得分:0)

确保您还使用casper组件上传依赖项“node_modules”。 给出错误是因为在lambda执行中没有在require中找到该组件。

答案 1 :(得分:0)

请点击此链接:https://github.com/narainsagar/node-casperjs-aws-lambda/issues/6#issuecomment-279177650

  

您好,您可以通过casper args支持将数据传递给scrapper脚本:

     

在index.js文件中对runCasper函数进行一些更改,如下所示:

 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'));
     

在您的casper脚本中,您可以获得这样的参数数据   下面:

{{1}}
     

希望这会有所帮助..

干杯,

纳拉因