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("127.0.0.1/index2.php", function () { this.echo("FIRST GOOD PAGE", "GREEN_BAR"); casper.options.stepTimeout = timeout; }); casper.thenOpen("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 和 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 waitFor 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("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.更多推荐
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