Question

我用一个网页尝试了这个代码，当我们按下keydown时，它的内容会动态加载。（比如facebook）

目标是获取所有净流量并将其打印到控制台。

var page = require('webpage').create(),
    system = require('system'),
    address;

if (system.args.length === 1) {
    console.log('Usage: netlog.js <some URL>');
    phantom.exit(1);
} else {
    address = system.args[1];

    page.onLoadFinished      = function(req) {
        console.log('requested: ' + JSON.stiringify(req, undefined, 4));

    };
    page.open(url, function () {
        page.sendEvent('keypress', page.event.key.keydown); 
    });
    page.onResourceRequested = function (req) {
        console.log('requested: ' + JSON.stringify(req, undefined, 4));
    };

    page.onResourceReceived = function (res) {
        console.log('received: ' + JSON.stringify(res, undefined, 4));
    };


    page.open(address, function (status) {
        if (status !== 'success') {
            console.log('FAIL to load the address');
        }
        phantom.exit();
    });

}

Answer 1

首先，PhantomJS是异步的。您同时打开两个页面。当第二页page.open()加载第一页时中止。这意味着您的page.sendEvent()来电永远不会被执行。

如果您想查看事件是否正在执行某些操作，您需要让页面加载并在执行某些操作后稍等一下以查看是否有请求：

if (system.args.length === 1) {
    console.log('Usage: netlog.js <some URL>');
    phantom.exit(1);
} else {
    address = system.args[1];

    page.onResourceRequested = function (req) {
        console.log('requested: ' + JSON.stringify(req, undefined, 4));
    };

    page.onResourceReceived = function (res) {
        console.log('received: ' + JSON.stringify(res, undefined, 4));
    };


    page.open(address, function (status) {
        if (status !== 'success') {
            console.log('FAIL to load the address');
            phantom.exit(1);
        }

        page.sendEvent('keypress', page.event.key.keydown); 

        setTimeout(function(){
            phantom.exit();
        }, 1000);
    });
}

发送keydown事件在PhantomJS

1 个答案: