本文介绍了CasperJS跳过超时的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我的casperjs测试中有一个页面有图像,我不要等到这个页面加载到下一步。我该怎么做 ?
我试过这种方式

I have one page in my casperjs test that has images , I dont what to wait until this page loaded to go to the next step. How can I do it ? I have tryed this way

var casper = require("casper").create({
   onStepTimeout: function() {
                        this.echo("TIMEOUT" + this.requestUrl,"RED_BAR");
   // Some skip page controlling code 
   },
);
var timeout = ~~casper.cli.get(0);

casper.start("http://127.0.0.1/index2.php", function () {
    this.echo("FIRST GOOD PAGE", "GREEN_BAR");
    casper.options.stepTimeout = timeout;
});

casper.thenOpen("http://127.0.0.1/slowpage.php", function() {
        this.echo("SECOND PAGE LOADED - I want to be called even  have received Timeout!", "GREEN_BAR");
});

casper.then(function() {
    this.echo("THEN!", "GREEN_BAR"); 
});

但是casper只是在加载slopage.php之前调用onStepTimeout。

But it casper just calls onStepTimeout until slopage.php is loaded.

推荐答案

您可以在casper中添加 request.abort(); 步骤结束步骤并继续下一步:

You can add request.abort(); in a casper step to end the step and proceed to the next step:

casper.then(function() {
  request.abort();
  this.echo('You will never see me');
});

casper.then(function() {
  this.echo('I execute next');
});

您还可以根据打开请求。此函数将检查匹配的URL,然后在打开之前中止,并将返回http状态代码:

You can also check if you want to abort based on open request. This function will check the url for a match and then abort before opening and will return an http status code:

casper.on('page.resource.requested', function(requestData, request) {
    if (requestData.url.indexOf('slowpage.php') !== -1) {
        request.abort();
    }
});

您可以更改 waitTimeout stepTimeout 设置。此外,在 pageSettings 下,您可以使casper不加载图像。示例:

You can change the waitTimeout and stepTimeout settings. Also, under pageSettings you can make casper not load images. Example:

var casper = require('casper').create ({
    waitTimeout: 10000,
    stepTimeout: 10000,
    verbose: true,
    viewportSize: {
      width: 1400,
      height: 768
    },
    pageSettings: {
      "userAgent": 'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.10 (KHTML, like Gecko) Chrome/23.0.1262.0 Safari/537.10',
      "loadImages": false,
      "loadPlugins": false,         
      "webSecurityEnabled": false,
      "ignoreSslErrors": true
    },
    onWaitTimeout: function() {
        //throw new Error
    },
    onStepTimeout: function() {
        //throw new Error
    }
});

你可以使用casper 等待页面完全加载。只需返回true 。它甚至有自己的超时功能。所以你可以这样做:

You can use casper waitFor to wait until the page has completely loaded. Just return true. It even has its own timeout function. So you could do something like this:

casper.waitFor(function check() {
    casper.thenOpen("http://127.0.0.1/slowpage.php", function() {
        //+++ casper will wait until this returns true to move forward. 
        //+++ The default timeout is set to 5000ms
        this.evaluate(function() {
          //checks for element exist
          if (document.getElementById('someElement')) {
            console.log('Im loaded!');
            return true;
          }
        });
    });   
}, function then() {    // step to execute when function check() is ok
    //+++ executes ONLY after the 'casper.thenOpen' returns true.
    this.echo("THEN!", "GREEN_BAR");
}, function timeout() { // step to execute if check has failed
    //+++ code for on timeout.  This is different than onStepTimeOut.
},1000);// custom timeOut setting.

这篇关于CasperJS跳过超时的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!

10-28 23:41