PhantomJs 与 Casperjs

利用PhantomJS做网页截图经济适用，但其API较少，做其他功能就比较吃力了。

CasperJs是对phantomjs的一次封装。即phantomjs是原生的，而casperjs是封装在以phantomjs基础上的玩意。

用CasperJS浏览页面比用PhantomJS更加方便和直观。

相关传送门：

# 官网
http://casperjs.org/
 
# github
https://github.com/casperjs/casperjs
 
# 快速入门
http://docs.casperjs.org/en/latest/quickstart.html
 
# API文档
http://docs.casperjs.org/en/latest/modules/index.html
 
# Event事件API文档
http://docs.casperjs.org/en/latest/events-filters.html#events-reference

# 利用phantomjs+casperjs实现登陆抓取网页并截图
http://blog.csdn.net/longhaoyou/article/details/43524977
 
# 入门练习demo
http://blog.csdn.net/kiwi_coder/article/details/36248353
 
# 利用nodejs+phantomjs+casperjs采集淘宝商品的价格
http://www.cnblogs.com/xinzhyu/p/4214669.html
 
# 萌萌CasperJS第1篇 1分钟写完爬虫 拿亚马逊商品数据
http://blog.csdn.net/sagomilk/article/details/20800543

# 解决乱码问题：

phantom.outputEncoding = "gbk";

# 利用open / AJAX发送HTTP请求

http://docs.casperjs.org/en/latest/modules/casper.html#open
 
http://docs.casperjs.org/en/latest/modules/clientutils.html#sendajax

# 监听页面的错误

phantom.outputEncoding = "gbk";
var casper = require('casper').create({
    viewportSize: {width: , height: },
    waitTimeout:
});
 
// 需要先申明，然后再start
casper.on('page.error', function (err) {
        this.echo(err)
})
 
casper.start('http://localhost:8081/#/home', function () {
    this.echo('Casper Starting');
})
 
casper.run();

# 快速判断元素是否存在

var casper = require('casper').create();
 
casper.start('http://domain.tld/page.html', function() {
    if (this.exists('h1.page-title')) {
        this.echo('the heading exists');
    }
});
 
casper.run();

# 建议对click之后的验证加入wait操作。这样可以有更好的保证. 并且建议尽可能使用thenClick。除非点击的元素要在指定的区域

  // houseBusinessDetails
    this.thenClick('.listviewItem:nth-child(1) .busitem').wait(, function () {
        this.echo(this.getCurrentUrl());
        this.capture('capture/houseBusinessDetails.png')
    })

# 可以用thenOpen进行跳转界面

  // carBusiness
    this.thenOpen('http://localhost:8081/#/carBusiness').waitForSelector('.listviewItem').wait(, function () {
        this.echo(this.getCurrentUrl());
        this.capture('capture/carBusiness.png')
    })

个人练手笔记

phantom.outputEncoding = "gbk";
var casper = require('casper').create({
    viewportSize: {width: 414, height: 736},
    waitTimeout:30000,
});
 
const u = function ()　{
    casper.echo("当前正在操作的URL为：" + casper.getCurrentUrl())
}
 
// 需要先申明，然后再start
casper.on('page.error', function (err) {
     this.echo("出现了error等级的错误信息------- " +  err, 1);
})
 
casper.start('http://localhost:8081/', function () {
    // Home
    this.waitForSelector("#app .centers-sec", function () {
        u()
        this.capture('capture/home.png')
    })
 
    // houseBusiness
    this.thenClick('.module:nth-child(1)').wait(1500, function () {
        u()
        this.capture('capture/houseBusiness.png')
    })
 
    // houseBusinessDetails
    this.thenClick('.listviewItem:nth-child(1) .busitem').wait(1500, function () {
        u()
        this.capture('capture/houseBusinessDetails.png')
    })
 
    // carBusiness
    this.thenOpen('http://localhost:8081/#/carBusiness').waitForSelector('.listviewItem').wait(1500, function () {
        u()
        this.capture('capture/carBusiness.png')
    })
 
    // CarBusinessDetails
    this.thenClick('.listviewItem:nth-child(1) .busitem').wait(1500, function () {
        u()
        this.capture('capture/CarBusinessDetails.png')
    })
 
    // lentOutDetail
    this.then(function () {
        if (this.exists('#header .right-btn a')) {
            this.thenClick('#header .right-btn a').wait(1500, function () {
                u()
                this.capture('capture/lentOutDetail.png')
            })
        }
    })
 
    // myBusiness
    this.thenOpen('http://localhost:8081/#/myBusiness').wait(1500, function () {
        u()
        this.capture('capture/myBusiness0.png')
    }).thenClick(".mint-tab-item:nth-child(2)").wait(2500, function () {
        u()
        this.capture('capture/myBusiness1.png')
    }).thenClick(".mint-tab-item:nth-child(3)").wait(1000, function () {
        u()
        this.capture('capture/myBusiness2.png')
    })
 
    // userInfo
    this.thenOpen('http://localhost:8081/#/user/userInfo').wait(1500, function () {
        u()
        this.capture('capture/userInfo.png')
    })
 
    // qrcode
    this.thenOpen('http://localhost:8081/#/qrcode').wait(1500, function () {
        u()
        this.capture('capture/qrcode.png')
    })
 
    // allLedger
    this.thenOpen('http://localhost:8081/#/allLedger').wait(3500, function () {
        u()
        this.capture('capture/allLedger.png')
    })
 
    // AutoRepay
    this.thenOpen('http://localhost:8081/#/AutoRepay').wait(3500, function () {
        u()
        this.capture('capture/AutoRepay.png')
    })
 
    // auditAssign
    this.thenOpen('http://localhost:8081/#/auditAssign').wait(2500, function () {
        u()
        this.capture('capture/auditAssign.png')
    })
})
 
casper.run();