最近做项目,需要实现网页抓屏。摸索后,决定采用phantomjs 实现。
phantomjs 的功能很强大,做爬虫应用,抓取网页数据、网页截屏、页面访问自动化等。
主要是 针对 抓屏的 demo实现.
php 代码:
<?php
/**
* Created by PhpStorm.
* User: Administrator
* Date: 2017/11/9 0009
* Time: 下午 4:41
*/
$dir = '';
$cmd = "{$dir}phantomjs --output-encoding=utf-8 ";
$js = $dir . "imagebin.js ";
$url = " http://baidu.com ";
$img_path = 'test.jpg';
$parms = " 795*1110px ";
$ssl = "{$cmd}{$js}{$url}{$img_path}{$parms}";
exec($ssl, $log, $status);
JS 代码:
var page = require('webpage').create(),
system = require('system'),
address, output, size;
//system 获得系统操作对象,包括命令行参数、phantomjs系统设置等信息
// page获取操作dom或web网页的对象,通过它可以打开网页、接收网页内容、request
if (system.args.length < 3 || system.args.length > 5) {
console.log('Usage: rasterize.js URL filename [paperwidth*paperheight|paperformat] [zoom]');
console.log(' paper (pdf output) examples: "5in*7.5in", "10cm*20cm", "A4", "Letter"');
console.log(' image (png/jpg output) examples: "1920px" entire page, window width 1920px');
console.log(' "800px*600px" window, clipped to 800x600');
phantom.exit(1);
} else {
address = system.args[1];
output = system.args[2];
page.viewportSize = {width: 600, height: 600};
if (system.args.length > 3 && system.args[2].substr(-4) === ".pdf") {
size = system.args[3].split('*');
page.paperSize = size.length === 2 ? {width: size[0], height: size[1], margin: '0px'}
: {format: system.args[3], orientation: 'portrait', margin: '1cm'};
} else if (system.args.length > 3 && system.args[3].substr(-2) === "px") {
size = system.args[3].split('*');
// console.log(size);
// phantom.exit(1);
if (size.length === 2) {
pageWidth = parseInt(size[0], 10);
pageHeight = parseInt(size[1], 10);
page.viewportSize = {width: pageWidth, height: pageHeight};
page.clipRect = {top: 10, left: 10, width: pageWidth, height: pageHeight};
} else {
console.log("size:", system.args[3]);
pageWidth = parseInt(system.args[3], 10);
pageHeight = parseInt(pageWidth * 3 / 4, 10); // it's as good an assumption as any
console.log ("pageHeight:", pageHeight);
page.viewportSize = {width: pageWidth, height: pageHeight};
}
}
if (system.args.length > 4) {
page.zoomFactor = system.args[4];
}
page.open(address , function (status) {
if (status !== 'success') {
console.log('Unable to load the address!');
phantom.exit(1);
} else {
window.setTimeout(function () {
page.render(output);
phantom.exit();
}, 200);
}
});
}
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