load->library('simple_html_dom_lib');
}
public function index()
{
$this->load->view('welcome');
}
public function optimize()
{
$htmlsource = $this->input->post('htmlsource');
$websitehost = $this->input->post('websitehost');
$template_name = $this->input->post('template_name');
$create_amp = $this->input->post('create_amp');
$debug = $this->input->post('debug');
if (empty($htmlsource) || empty($websitehost)) {
$this->output->set_status_header(500);
echo 'error:htmlsource or websitehost is empty!';
log_message('error', "htmlsource or websitehost is empty! " . $websitehost);
return false;
}
//域名后面不能有/
if (substr($websitehost, -1, 1) == '/') {
$websitehost = substr($websitehost, 0, -1);
}
$html_object = str_get_html($htmlsource);
if (!empty($html_object)) {
//提取和下载所有CSS样式，包括链接文件和页面样式
$link_css_array = array();
$css_content = '';
foreach ($html_object->find('link') as $link_css) {
if ($link_css->rel == 'stylesheet' && !empty($link_css->href)) {
$link_css_array[] = $link_css->href;
$link_css->outertext = ''; //删除链接
}
}
//print_r($link_css_array);
foreach ($link_css_array as $item) {
$get_http_temp = GET_HTTP($this->format_url($item, $websitehost));
if ($get_http_temp == false) {
$this->output->set_status_header(404);
echo 'CSS文件下载错误';
log_message('error', "optimize CSS文件下载错误! " . $item);
return FALSE;
}
$css_content .= $get_http_temp;
}
foreach ($html_object->find('style') as $style_css) {
if ($style_css->type == "text/css") {
$css_content .= $style_css->innertext;
}
}
// echo $css_content;
// echo $html_object;die();
//
//提取和下载所有JS脚本，包括链接文件和页面脚本
$link_js_array = array();
$js_inline_content = '';
$js_jquery_content = '';
foreach ($html_object->find('script') as $link_script) {
if (!empty($link_script->src)) {
if (empty($link_script->defer) && empty($link_script->async)) { //没有defer标记的才处理，否则让js延后加载
$link_js_array[] = $link_script->src;
$link_script->outertext = ''; //删除链接，移动到页底
}
} else {
//网页内的js不需要提取
//$js_content.= $link_script->innertext;//js的内容
// $js_content.= $link_script;//js的内容，包含';
$js_content = $js_scr_content . $js_jquery_content;
//延迟加载js，需要把返回的js代码保存到一个文件中，然后替换占位符，以便加载js文件
$lastload_js .= '';
$lastload_js .= $js_inline_content;
$html_object = str_replace('', $lastload_js . '', $html_object);
}
//只返回AMP代码
if (!empty($create_amp)) {
$amp = $this->create_amp($html_object, $template_name, $websitehost,$debug);
echo json_encode(array('result' => 'ok', 'data' => array('amp' => $amp)));
return;
}
echo json_encode(array('result' => 'ok', 'data' => array('html_object' => $html_object, 'js_content' => $js_content)));
}
//格式化url，保证请求的URL有域名，//更换为对应的域名路径
function format_url($url, $host = '')
{
if (substr($url, 0, 8) == 'https://' || substr($url, 0, 7) == 'http://') {
$url = str_replace('http://', 'https://', $url);//http要改为https
return urldecode($url);
}
if (substr($url, 0, 2) == '//') { //https或http
return urldecode('https://'.substr($url, 2, strlen($url)-2)); //只替换开头的//，部分url不规范，有//在url中间
}
return urldecode($host . $url);
}
//生成AMP版本 用移动端版本生成
/*
1.加载站点AMP模板，模板只有导航、头部、底部
2.删除全部js引用和内链代码
3.删除全部css引用，内联css放入