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<?php
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if (!defined('BASEPATH'))
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exit('No direct script access allowed');
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class Index extends CI_Controller {
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public function __construct() {
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parent::__construct();
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$this->load->library('simple_html_dom_lib');
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}
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public function index() {
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$this->load->view('welcome');
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}
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public function optimize() {
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$htmlsource = $this->input->post('htmlsource');
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$websitehost = $this->input->post('websitehost');
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if (empty($htmlsource) || empty($websitehost)) {
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$this->output->set_status_header(500);
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echo 'error:htmlsource or websitehost is empty!';
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return false;
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}
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//域名后面不能有/
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if (substr($websitehost, -1, 1) == '/') {
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$websitehost = substr($websitehost, 0, -1);
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}
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$html_object = str_get_html($htmlsource);
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if (!empty($html_object)) {
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//提取和下载所有CSS样式，包括链接文件和页面样式
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$link_css_array = array();
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$css_content = '';
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foreach ($html_object->find('link') as $link_css) {
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if ($link_css->rel == 'stylesheet' && !empty($link_css->href)) {
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$link_css_array[] = $link_css->href;
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$link_css->outertext = ''; //删除链接
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}
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}
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//print_r($link_css_array);
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foreach ($link_css_array as $item) {
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$css_content.= GET_HTTP($this->format_url($item, $websitehost));
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}
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foreach ($html_object->find('style') as $style_css) {
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if ($style_css->type == "text/css") {
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$css_content .= $style_css->innertext;
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}
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}
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// echo $css_content;
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// echo $html_object;die();
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//
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//提取和下载所有JS脚本，包括链接文件和页面脚本
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$link_js_array = array();
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$js_content = '';
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foreach ($html_object->find('script') as $link_script) {
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if (!empty($link_script->src)) {
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$link_js_array[] = $link_script->src;
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$link_script->outertext = ''; //删除链接，移动到页底
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} else {
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//网页内的js不需要提取
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//$js_content.= $link_script->innertext;//js的内容
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$js_content.= $link_script;
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$link_script->outertext = ''; //删除js，移动到页底
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}
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}
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foreach ($link_js_array as $item) {
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//$js_content.= GET_HTTP($this->format_url($item, $websitehost));
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}
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//echo $js_content;
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//把网页内容和css提交到purifycss处理
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$optimize_css = GET_HTTP('http://184.172.113.219:33033/', 'html_source=' . urlencode($htmlsource) . '&html_css=' . urlencode($css_content), 'POST');
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if (empty($optimize_css)) {
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$this->output->set_status_header(500);
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echo 'css精简错误';
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echo '<!-- ' . $css_content . ' -->';
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return FALSE;
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}
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//把精简的css添加到head后面
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$html_object = str_replace('</title>', '</title><style type="text/css">' . $optimize_css . "</style>", $html_object);
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//在最后加载原始css文件和js文件
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$lastload_js = '<script>';
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//把css移动到页面底部
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foreach ($link_css_array as $item) {
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$lastload_js.='var elem=document.createElement("link");elem.rel="stylesheet";elem.type="text/css";elem.href="' . $item . '";document.body.appendChild(elem);';
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}
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$lastload_js.='</script>';
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//把js移动到页面底部
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foreach ($link_js_array as $item) {
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$lastload_js.='<script src="' . $item . '"></script>';
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}
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$lastload_js.=$js_content;
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$html_object = str_replace('</body>', $lastload_js . '</body>', $html_object);
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}
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echo $html_object;
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}
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//格式化url，保证请求的URL有域名，//更换为对应的域名路径
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function format_url($url, $host = '') {
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if (substr($url, 0, 8) == 'https://' || substr($url, 0, 7) == 'http://') {
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return urldecode($url);
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}
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if (substr($url, 0, 2) == '//') { //https或http
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return urldecode(str_replace('//', 'http://', $url));
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}
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return urldecode($host . $url);
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}
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}
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