我正在努力教自己如何更好地使用PhantomJS。
我想要点击一个特定的选择器（如下所示）。
#s-t-menu > li:nth-child(3) > a
我已打开一个页面，已登录，现在想要关注链接。但是，到目前为止，我在跟踪此链接方面一直没有结果（登录成功）。我的代码如下：
//********SETUP**********\\
var webPage = require('webpage');
var page = webPage.create();
page.settings.userAgent = 'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/44.0.2403.157 Safari/537.36';
page.settings.javascriptEnabled = true;
page.settings.loadImages = false;
phantom.cookiesEnabled = true;
phantom.javascriptEnabled = true;
page.onConsoleMessage = function(msg, lineNum, sourceId) {
console.log(msg);
};
//******END SETUP************\\
//******FUNCTIONS************\\
function click(el){
var ev = document.createEvent("MouseEvent");
ev.initMouseEvent(
"click",
true /* bubble */, true /* cancelable */,
window, null,
0, 0, 0, 0, /* coordinates */
false, false, false, false, /* modifier keys */
0 /*left*/, null
);
el.dispatchEvent(ev);
}
//******END FUNCTIONS*******\\
//*****OPEN PAGES*****\\
page.open("https://helphub.me/login", function(status) {
if ( status === "success" ) {
console.log("Opened Login Page Succesfully \n");
page.includeJs("http://ajax.googleapis.com/ajax/libs/jquery/1.6.1/jquery.min.js", function(){
page.evaluate(function() {
//*****LOGS IN*****\\
document.querySelector("#login_header > span.ll > form > input:nth-child(1)").value = "REDACTED_FOR_STACKEXCHANGE";
document.querySelector("#login_header > span.ll > form > input:nth-child(2)").value = "REDACTED_FOR_STACKEXCHANGE";
document.querySelector("[name='loginf']").submit();
console.log("Logged In \n");
document.querySelector("#s-t-menu > li:nth-child(3) > a").click();
});
});
//*****SCREENSHOT FOR EVALUATION*****\\
window.setTimeout(function () {
page.render('/Screenshots/LoggedIn.png');
phantom.exit();
}, 5000);
//******SCREENSHOT END****************\\
}
});
//*****END OPEN PAGES*****\\
在当前状态下，我在控制台中收到以下内容：
Opened Login Page Succesfully
The page at https://helphub.me/login ran insecure content from http://ajax.googleapis.com/ajax/libs/jquery/1.6.1/jquery.min.js.
Facebook Pixel Warning: Multiple pixels with conflicting versions were detected on this page
Logged In
TypeError: null is not an object (evaluating 'document.querySelector("#s-t-menu > li:nth-child(3) > a").click')
undefined:10
:14
Facebook Pixel Warning: Multiple pixels with conflicting versions were detected on this page
我也尝试过：
$("#s-t-menu > li:nth-child(3) > a").click();
并获取
Opened Login Page Succesfully
The page at https://helphub.me/login ran insecure content from http://ajax.googleapis.com/ajax/libs/jquery/1.6.1/jquery.min.js.
Logged In
Facebook Pixel Warning: Multiple pixels with conflicting versions were detected on this page
在所有这些情况下，当我去查看截图时，我现在处于正确的屏幕上;我刚刚登录。
当我运行命令时，我包括
--ignore-ssl-errors=yes
最后，我尝试使用Google Chrome控制台
document.querySelector("#s-t-menu > li:nth-child(3) > a").click();
在登录页面上，它工作正常。
任何帮助表示赞赏！ :)
整个HTML网页来源如下：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:og="http://ogp.me/ns#"
xmlns:fb="http://www.facebook.com/2008/fbml">
<head>
<meta charset="utf-8" />
<meta property="og:type" content="website" />
<meta property="og:title" content="" />
<meta property="og:url" content="https://helphub.me/dashboard/?signup=success" />
<meta property="og:description" content="" />
<meta name="description" content="Get help from expert online tutors over online messaging and tutoring calls, 24/7. Get started with online tutoring today!" />
<meta property="og:description" content="HelpHub connects students with tutors over online messaging and tutoring calls." />
<link rel="image_src" href="https://helphub.me/img/ogimage.jpg" />
<meta property="og:image" content="https://helphub.me/img/ogimage.jpg" />
<meta property="og:type" content="website" />
<meta property="og:title" content="Dashboard – HelpHub" />
<meta property="og:url" content="https://helphub.me/" />
<title>Dashboard – HelpHub</title>
<base href="https://helphub.me/" />
<link href="style.css" media="screen" rel="stylesheet" type="text/css" />
<meta name="apple-itunes-app" content="app-id=915930220">
<link href="https://helphub.me/bootstrap.css" media="screen" rel="stylesheet" type="text/css" />
<link href="https://helphub.me/animations.css" media="screen" rel="stylesheet" type="text/css" />
<link rel="stylesheet" type="text/css" href="jquery.timepicker.css" />
<link rel="stylesheet" type="text/css" href="https://helphub.me/d_base.css" />
<link rel="stylesheet" type="text/css" href="//code.jquery.com/ui/1.10.3/themes/smoothness/jquery-ui.css" />
<link rel="stylesheet" type="text/css" href="https://cdnjs.cloudflare.com/ajax/libs/qtip2/2.2.0/jquery.qtip.min.css" />
<link type="text/css" rel="stylesheet" media="all" href="chat/css/chat.css" />
<script type="text/javascript" src="https://helphub.me/javascript/jquery-1.10.2.min.js"></script>
<script src='https://static.opentok.com/v2/js/opentok.min.js'></script>
<script type="text/javascript" src="js/bootstrap.min.js"></script>
<script type="text/javascript" src="/inputfocus.js"></script>
<script type="text/javascript" src="/functions.js"></script>
<script type="text/javascript" src="chat/js/chatjs.php"></script>
<!--[if lte IE 7]>
<link type="text/css" rel="stylesheet" media="all" href="css/screen_ie.css" />
<![endif]-->
<script type="text/javascript" src="//use.typekit.net/pyo7dcc.js"></script>
<script type="text/javascript">try{Typekit.load();}catch(e){}</script>
<script src="javascript/call_tutor.js"></script>
<script type="text/javascript" src="javascript/accept_call.js"></script>
<link rel="stylesheet" type="text/css" href="css/whiteboard.css" />
<link rel="stylesheet" href="/jquery.fancybox.css?v=2.1.4" type="text/css" media="screen" />
<link href="flat.css" rel="stylesheet" />
<link rel="stylesheet" href="css/basics.css">
<link rel="stylesheet" href="css/font-awesome.min.css">
<script type="text/javascript" src="js/jquery.datetimepicker.js"></script>
<script type="text/javascript" src="js/tutor_dashboard.js"></script>
<link href="/css/tutor_dashboard.css" media="screen" rel="stylesheet" type="text/css" />
<link rel="stylesheet" type="text/css" href="css/jquery.datetimepicker.css"/ >
<script type="text/javascript">(function(e,b){if(!b.__SV){var a,f,i,g;window.mixpanel=b;a=e.createElement("script");a.type="text/javascript";a.async=!0;a.src=("https:"===e.location.protocol?"https:":"http:")+'//cdn.mxpnl.com/libs/mixpanel-2.2.min.js';f=e.getElementsByTagName("script")[0];f.parentNode.insertBefore(a,f);b._i=[];b.init=function(a,e,d){function f(b,h){var a=h.split(".");2==a.length&&(b=b[a[0]],h=a[1]);b[h]=function(){b.push([h].concat(Array.prototype.slice.call(arguments,0)))}}var c=b;"undefined"!==
typeof d?c=b[d]=[]:d="mixpanel";c.people=c.people||[];c.toString=function(b){var a="mixpanel";"mixpanel"!==d&&(a+="."+d);b||(a+=" (stub)");return a};c.people.toString=function(){return c.toString(1)+".people (stub)"};i="disable track track_pageview track_links track_forms register register_once alias unregister identify name_tag set_config people.set people.set_once people.increment people.append people.track_charge people.clear_charges people.delete_user".split(" ");for(g=0;g<i.length;g++)f(c,i[g]);
b._i.push([a,e,d])};b.__SV=1.2}})(document,window.mixpanel||[]);
mixpanel.init("96c84aa9e26ab91ee361872c1c01a430");</script>
</head>
<body>
<script type="text/javascript">
var WRInitTime=(new Date()).getTime();
</script>
<div id="header">
<ul id="call-notification"></ul>
<div class="container">
<div class="top">
<h4 class="logo"><a href="./dashboard" class="indent">HelpHub</a></h4>
<span class="searchheader">
<form method="get" action="/search/" name="searchheader">
<div class='bbox'>
<input class="searchh" name="q" value="Search tutors by subject, school, or city..." id="search" />
</div>
</form>
</span>
<span class="usettings">
<i class="settings"><a href="/settings"></a></i>
<ul class="settings_pulldown settings_pulldown_s">
<li><h4>Your credits are: <br><span id="show_my_user_balance">$0.00</span><span id="my_user_balance">0</span></h4><br><a href="/settings/billing" class="btn btn-success vam">Add Credits</a></li>
<li><a href="/settings">Profile Settings</a></li>
<li><a href="/settings/billing">Add Credits</a></li>
<li><a href="/settings/tutoring">Tutoring Settings</a></li>
<li><a href="/logout.php">Logout</a></li>
</ul>
<a class="msgs_h" href="/dashboard"><i class="glyphicon glyphicon-dashboard"></i></a>
<a class="msgs_h" href="/messages"><i class="glyphicon glyphicon-envelope"></i></a>
<i class="ask tooltipthis" data-tooltip="Post a question and reach all of our tutors at once. You will be notified when you receive answers."><a data-toggle="modal" data-target="#AskModal" href="#"></a></i>
<a href="/TestGroundTutoring" class="myavatar"><img class="avatar_tip" alt="" src="img/noavatar.jpg" /></a>
</span>
</div>
</div>
</div>
<div class="main_dashboard_container">
<div id="dashboard_sidebar">
<div class="sidebar_content_dashboard">
<div class="sidebar_uinfo">
<div class="s-u-photo">
<a href="/TestGroundTutoring"><img alt="" src="img/noavatar.jpg" /></a>
</div>
<span class="s-u-balance">
Your earnings: <strong>$0.00</strong>
</span>
</div>
<ul id="s-t-menu">
<li><a href="/dashboard"><i class="fa fa-tachometer"></i> Dashboard</a></li>
<li><a href="/messages"><i class="fa fa-envelope"></i>Messages</a></li>
<li><a href="/questions"><i class="fa fa-question-circle"></i>Questions</a></li>
<li><a href="/calendar"><i class="fa fa-calendar"></i>Calendar</a></li>
<li><a href="/dashboard/group-tutoring"><i class="fa fa-users"></i>Group Tutoring</a></li>
<li>
<a href="/settings"><i class="fa fa-cog"></i>Settings</a>
<ul class="n_menu">
<li><a href="/settings"><i class="fa fa-user"></i>Profile Settings</a></li>
<li><a href="/settings/tutoring"><i class="fa fa-cogs"></i>Tutoring Settings</a></li>
<li><a href="/settings/availability"><i class="fa fa-clock-o"></i>Set Availability</a></li>
<li><a href="/settings/payments"><i class="fa fa-money"></i>Payment Settings</a></li>
</ul>
</li>
</ul>
</div>
</div>
<div id="middle-container-d">
<div class="container_dashboard">
<div class="dashboard_widget">
<h2>Twitter Leads</h2>
<p class="tw_leads_link">If you'd like to share your HelpHub profile with people on Twitter, simply tweet this link:
https://helphub.me/TestGroundTutoring</p>
<div class="dash_scrollable twitter_leads">
<p>Twitter leads are temporarily unavailable. Please check back later.</p>
</div>
</div>
<div class="dashboard_widget">
<h2>Your profile visibility</h2>
<div class="dash_scrollable">
<div class="tutor_iq_section">
<h4>Your <em>Tutor Karma</em> is</h3>
<h3>
100 </h3>
<p>Your <em>Tutor Karma</em> increases your visibility on the site. These are some ways you can increase it:</p>
</div>
<div id="show_dashboard_tips"></div>
<script type="text/javascript">
$(document).ready(function(){
get_dashboard_tips();
});
</script>
</div>
</div>
<div class="dashboard_widget">
<h2>Who's seen your profile</h2>
<div class="dash_scrollable">
<p>Nobody has recently seen your profile.</p> </div>
</div>
<div class="dashboard_widget">
<h2>Your account activity</h2>
<div class="dash_scrollable">
<p>Your account hasn't had any recent tutoring activity.</p><p>Every time you call a tutor, you will see the amount spent and the length of the call.</p> </div>
</div>
</div>
</div>
</div>
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<div id="AskModal" class="modal hide fade" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true">
<button type="button" class="close" data-dismiss="modal" aria-hidden="true">×</button>
<div class="modal-header">
<h2 id="myModalLabel">Ask a Question</h2>
</div>
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<form method="post" action="/signup" name="signupform" class="signupform"><p><label><strong>Choose a nickname</strong> (it cannot be changed later)<br><input type="text" value="" name="nick" maxlenght="60" class="inputsignup"></label></p><p><label><strong>What's your E-mail?</strong><br><input type="text" value="" name="semail" maxlenght="160" class="inputsignup"></label> </p> <p><label> <strong>Choose a password</strong><br> <input type="password" name="pass" class="inputsignup"> </label> </p> <p> <label><input name="agree" class="check" type="checkbox" value="1"> I have read and agree with the <a href="/tos" target="_blank">Terms of Service</a>.</label> </p> <input type="hidden" name="modal" value="1" /><p class="buttons"><button type="submit">Create an account</button></p> </form>
</div>
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<a href="/online-tutoring-jobs">Become a tutor</a>
</div>
</div>
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<label>Try Math, Chemistry, English...<br />
<input class="search" value="" id="search" name="q" placeholder="Search tutors, subjects, or schools..." />
</label>
</span>
<h4>Advanced search:</h4>
<span class='inputbox'>
<label>By School:<br />
<input class="advanced_input" value="" name="network" placeholder="School name..." />
</label>
<label>By City or Location:<br />
<input value="" class="advanced_input" name="city" placeholder="Add a city..." />
</label>
<label>Order by:<br />
<select name="orderby" onchange="this.form.submit();" size="1" class="minimarginbotton">
<option value="relevance">Relevance</option>
<option value="lowest">Lowest rate</option>
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</select>
</label>
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</span>
</form>
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Your <em>Tutor Karma</em> is <strong>100</strong>
</a>
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<script type="text/javascript" src="https://helphub.me/jquery.parallax-1.1.3.js"></script>
<script type="text/javascript" src="https://helphub.me/datepair.js"></script>
<script type="text/javascript" src="https://helphub.me/notify.min.js"></script>
<script type="text/javascript" src="https://helphub.me/jquery.timepicker.js"></script>
<script type="text/javascript" src="https://helphub.me/js/jquery.qtip.min.js"></script>
<script src="https://helphub.me/js/flatui-checkbox.js"></script>
<script src="https://helphub.me/js/flatui-radio.js"></script>
<script src="https://helphub.me/js/jquery.tagsinput.js"></script>
<script src="//code.jquery.com/ui/1.10.3/jquery-ui.js"></script>
<script src="https://helphub.me/js/jquery.placeholder.js"></script>
<script src="https://helphub.me/js/jquery.stacktable.js"></script>
<script src="https://helphub.me/js/search_suggestions.js"></script>
<script src="https://helphub.me/js/jquery.geocomplete.js"></script>
<script type="text/javascript" src="https://helphub.me/javascript/jquery.fileupload.js"></script>
<script type="text/javascript" src="https://helphub.me/javascript/vendor/jquery.ui.widget.js"></script>
<script type="text/javascript" src="https://helphub.me/javascript/jquery.iframe-transport.js"></script>
</body>
</html>
答案 0 :(得分：0)
提交登录页面后，通常会在页面重新加载或更新之前一段时间，因此您必须等待（不可靠 - 未知需要多长时间）或使用在页面加载完成后触发的回调：
page.onLoadFinished = function(){
var currentUrl = page.evaluate(function() {
return window.location.href;
};
// we're not on .../login page anymore
// (if after login site redirects you elsewhere)
if(currentUrl.indexOf("login") == -1) {
// do stuff you want to do after login
} else {
// login here
}
}
page.open("https://example.com/");